diff options
| -rw-r--r-- | epan/sigcomp-udvm.c | 1155 | ||||
| -rw-r--r-- | epan/sigcomp-udvm.h | 4 | ||||
| -rw-r--r-- | epan/sigcomp_state_hdlr.c | 1294 | ||||
| -rw-r--r-- | epan/sigcomp_state_hdlr.h | 90 |
4 files changed, 1323 insertions, 1220 deletions
diff --git a/epan/sigcomp-udvm.c b/epan/sigcomp-udvm.c index 1217809ea5..57b1234cac 100644 --- a/epan/sigcomp-udvm.c +++ b/epan/sigcomp-udvm.c @@ -37,7 +37,6 @@ #include <stdio.h> #include <stdlib.h> #include <string.h> -#include <math.h> #include <glib.h> #ifdef NEED_SNPRINTF_H @@ -91,6 +90,7 @@ static gboolean print_level_1; static gboolean print_level_2; static gboolean print_level_3; +static gint show_instr_detail_level; /* Internal result code values of decompression failures */ const value_string result_code_vals[] = { @@ -103,13 +103,14 @@ const value_string result_code_vals[] = { { 6, "Atempt to jump outside of UDVM memory" }, { 7, "L in input-bits > 16" }, { 8, "input_bit_order > 7" }, - { 9, "Instruction Decompression failure encounterd" }, + { 9, "Instruction Decompression failure encountered" }, {10, "Input huffman failed j > n" }, - {11, "Input bits requested beond end of message" }, + {11, "Input bits requested beyond end of message" }, {12, "more than four state creation requests are made before the END-MESSAGE instruction" }, {13, "state_retention_priority is 65535" }, {14, "Input bytes requested beond end of message" }, {15, "Maximum number of UDVM cycles reached" }, + {16, "UDVM stack underflow" }, { 255, "This branch isn't coded yet" }, { 0, NULL } }; @@ -125,7 +126,10 @@ static int decomp_dispatch_get_bits(tvbuff_t *message_tvb,proto_tree *udvm_tree, tvbuff_t* decompress_sigcomp_message(tvbuff_t *bytecode_tvb, tvbuff_t *message_tvb, packet_info *pinfo, - proto_tree *udvm_tree, gint udvm_mem_dest, gint print_flags, gint hf_id) + proto_tree *udvm_tree, gint udvm_mem_dest, + gint print_flags, gint hf_id, + gint header_len, + gint byte_code_state_len, gint byte_code_id_len) { tvbuff_t *decomp_tvb; guint8 buff[UDVM_MEMORY_SIZE]; @@ -153,6 +157,8 @@ decompress_sigcomp_message(tvbuff_t *bytecode_tvb, tvbuff_t *message_tvb, packet guint16 byte_copy_right; guint16 byte_copy_left; guint16 input_bit_order; + guint16 stack_location; + guint16 stack_fill; guint16 result; guint msg_end = tvb_reported_length_remaining(message_tvb, 0); guint16 result_code; @@ -212,10 +218,13 @@ decompress_sigcomp_message(tvbuff_t *bytecode_tvb, tvbuff_t *message_tvb, packet guint16 returned_parameters_location; guint16 start_value; + /* Set print parameters */ print_level_1 = FALSE; print_level_2 = FALSE; print_level_3 = FALSE; + show_instr_detail_level = 0; + switch( print_flags ) { @@ -224,18 +233,22 @@ decompress_sigcomp_message(tvbuff_t *bytecode_tvb, tvbuff_t *message_tvb, packet case 1: print_level_1 = TRUE; + show_instr_detail_level = 1; break; case 2: print_level_1 = TRUE; print_level_2 = TRUE; + show_instr_detail_level = 1; break; case 3: print_level_1 = TRUE; print_level_2 = TRUE; print_level_3 = TRUE; + show_instr_detail_level = 2; break; default: print_level_1 = TRUE; + show_instr_detail_level = 1; break; } @@ -243,7 +256,6 @@ decompress_sigcomp_message(tvbuff_t *bytecode_tvb, tvbuff_t *message_tvb, packet - /* UDVM memory must be initialised to zero */ while ( i < UDVM_MEMORY_SIZE ) { buff[i] = 0; @@ -273,8 +285,8 @@ decompress_sigcomp_message(tvbuff_t *bytecode_tvb, tvbuff_t *message_tvb, packet * Figure 5: Initializing Useful Values in UDVM memory */ /* UDVM_memory_size */ - buff[0] = 0; - buff[1] = 0; + buff[0] = (UDVM_MEMORY_SIZE >> 8) & 0x00FF; + buff[1] = UDVM_MEMORY_SIZE & 0x00FF; /* cycles_per_bit */ buff[2] = 0; buff[3] = 16; @@ -282,11 +294,12 @@ decompress_sigcomp_message(tvbuff_t *bytecode_tvb, tvbuff_t *message_tvb, packet buff[4] = 0; buff[5] = 1; /* partial_state_ID_length */ - buff[6] = 0; - buff[7] = 0; + buff[6] = (byte_code_id_len >> 8) & 0x00FF; + buff[7] = byte_code_id_len & 0x00FF; /* state_length */ - buff[8] = 0; - buff[9] = 0; + buff[8] = (byte_code_state_len >> 8) & 0x00FF; + buff[9] = byte_code_state_len & 0x00FF; + code_length = tvb_reported_length_remaining(bytecode_tvb, 0); cycles_per_bit = buff[2] << 8; @@ -294,7 +307,7 @@ decompress_sigcomp_message(tvbuff_t *bytecode_tvb, tvbuff_t *message_tvb, packet /* * maximum_UDVM_cycles = (8 * n + 1000) * cycles_per_bit */ - maximum_UDVM_cycles = (( 8 * msg_end ) + 1000) * cycles_per_bit; + maximum_UDVM_cycles = (( 8 * (header_len + msg_end) ) + 1000) * cycles_per_bit; proto_tree_add_text(udvm_tree, bytecode_tvb, offset, 1,"maximum_UDVM_cycles(%u) = (( 8 * msg_end(%u) ) + 1000) * cycles_per_bit(%u)",maximum_UDVM_cycles,msg_end,cycles_per_bit); proto_tree_add_text(udvm_tree, bytecode_tvb, offset, 1,"Message Length: %u,Byte code length: %u, Maximum UDVM cycles: %u",msg_end,code_length,maximum_UDVM_cycles); @@ -363,7 +376,7 @@ execute_next_instruction: case SIGCOMP_INSTR_AND: /* 1 AND ($operand_1, %operand_2) */ used_udvm_cycles++; - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, "Addr: %u ## AND(1) (operand_1, operand_2)", current_address); @@ -371,17 +384,23 @@ execute_next_instruction: /* $operand_1*/ operand_address = current_address + 1; next_operand_address = dissect_udvm_reference_operand(buff, operand_address, &operand_1, &result_dest); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u operand_1 %u", operand_address, operand_1); } operand_address = next_operand_address; /* %operand_2*/ next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &operand_2); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u operand_2 %u", operand_address, operand_2); } + if (show_instr_detail_level == 1) + { + proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, + "Addr: %u ## AND (operand_1=%u, operand_2=%u)", + current_address, operand_1, operand_2); + } /* execute the instruction */ result = operand_1 & operand_2; lsb = result & 0xff; @@ -399,7 +418,7 @@ execute_next_instruction: case SIGCOMP_INSTR_OR: /* 2 OR ($operand_1, %operand_2) */ used_udvm_cycles++; - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, "Addr: %u ## OR(2) (operand_1, operand_2)", current_address); @@ -407,17 +426,23 @@ execute_next_instruction: /* $operand_1*/ operand_address = current_address + 1; next_operand_address = dissect_udvm_reference_operand(buff, operand_address, &operand_1, &result_dest); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u operand_1 %u", operand_address, operand_1); } operand_address = next_operand_address; /* %operand_2*/ next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &operand_2); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u operand_2 %u", operand_address, operand_2); } + if (show_instr_detail_level == 1) + { + proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, + "Addr: %u ## OR (operand_1=%u, operand_2=%u)", + current_address, operand_1, operand_2); + } /* execute the instruction */ result = operand_1 | operand_2; lsb = result & 0xff; @@ -435,7 +460,7 @@ execute_next_instruction: case SIGCOMP_INSTR_NOT: /* 3 NOT ($operand_1) */ used_udvm_cycles++; - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, "Addr: %u ## NOT(3) ($operand_1)", current_address); @@ -443,10 +468,16 @@ execute_next_instruction: /* $operand_1*/ operand_address = current_address + 1; next_operand_address = dissect_udvm_reference_operand(buff, operand_address, &operand_1, &result_dest); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u operand_1 %u", operand_address, operand_1); } + if (show_instr_detail_level == 1) + { + proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, + "Addr: %u ## NOT (operand_1=%u)", + current_address, operand_1); + } /* execute the instruction */ result = operand_1 ^ 0xffff; lsb = result & 0xff; @@ -463,7 +494,7 @@ execute_next_instruction: case SIGCOMP_INSTR_LSHIFT: /* 4 LSHIFT ($operand_1, %operand_2) */ used_udvm_cycles++; - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, "Addr: %u ## LSHIFT(4) ($operand_1, operand_2)", current_address); @@ -471,17 +502,23 @@ execute_next_instruction: /* $operand_1*/ operand_address = current_address + 1; next_operand_address = dissect_udvm_reference_operand(buff, operand_address, &operand_1, &result_dest); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u operand_1 %u", operand_address, operand_1); } operand_address = next_operand_address; /* %operand_2*/ next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &operand_2); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u operand_2 %u", operand_address, operand_2); } + if (show_instr_detail_level == 1) + { + proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, + "Addr: %u ## LSHIFT (operand_1=%u, operand_2=%u)", + current_address, operand_1, operand_2); + } /* execute the instruction */ result = operand_1 << operand_2; lsb = result & 0xff; @@ -496,9 +533,9 @@ execute_next_instruction: goto execute_next_instruction; break; - case SIGCOMP_INSTR_RSHIFT: /* 5 RSHIFT ($operand_1, %operand_2) */ + case SIGCOMP_INSTR_RSHIFT: /* 5 RSHIFT ($operand_1, %operand_2) */ used_udvm_cycles++; - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, "Addr: %u ## RSHIFT(5) (operand_1, operand_2)", current_address); @@ -506,17 +543,23 @@ execute_next_instruction: /* $operand_1*/ operand_address = current_address + 1; next_operand_address = dissect_udvm_reference_operand(buff, operand_address, &operand_1, &result_dest); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u operand_1 %u", operand_address, operand_1); } operand_address = next_operand_address; /* %operand_2*/ next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &operand_2); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u operand_2 %u", operand_address, operand_2); } + if (show_instr_detail_level == 1) + { + proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, + "Addr: %u ## RSHIFT (operand_1=%u, operand_2=%u)", + current_address, operand_1, operand_2); + } /* execute the instruction */ result = operand_1 >> operand_2; lsb = result & 0xff; @@ -530,9 +573,9 @@ execute_next_instruction: current_address = next_operand_address; goto execute_next_instruction; break; - case SIGCOMP_INSTR_ADD: /* 6 ADD ($operand_1, %operand_2) */ + case SIGCOMP_INSTR_ADD: /* 6 ADD ($operand_1, %operand_2) */ used_udvm_cycles++; - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, "Addr: %u ## ADD(6) (operand_1, operand_2)", current_address); @@ -540,17 +583,23 @@ execute_next_instruction: /* $operand_1*/ operand_address = current_address + 1; next_operand_address = dissect_udvm_reference_operand(buff, operand_address, &operand_1, &result_dest); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u operand_1 %u", operand_address, operand_1); } operand_address = next_operand_address; /* %operand_2*/ next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &operand_2); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u operand_2 %u", operand_address, operand_2); } + if (show_instr_detail_level == 1) + { + proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, + "Addr: %u ## ADD (operand_1=%u, operand_2=%u)", + current_address, operand_1, operand_2); + } /* execute the instruction */ result = operand_1 + operand_2; lsb = result & 0xff; @@ -564,9 +613,9 @@ execute_next_instruction: current_address = next_operand_address; goto execute_next_instruction; - case SIGCOMP_INSTR_SUBTRACT: /* 7 SUBTRACT ($operand_1, %operand_2) */ + case SIGCOMP_INSTR_SUBTRACT: /* 7 SUBTRACT ($operand_1, %operand_2) */ used_udvm_cycles++; - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, "Addr: %u ## SUBTRACT(7) (operand_1, operand_2)", current_address); @@ -574,17 +623,23 @@ execute_next_instruction: /* $operand_1*/ operand_address = current_address + 1; next_operand_address = dissect_udvm_reference_operand(buff, operand_address, &operand_1, &result_dest); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u operand_1 %u", operand_address, operand_1); } operand_address = next_operand_address; /* %operand_2*/ next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &operand_2); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u operand_2 %u", operand_address, operand_2); } + if (show_instr_detail_level == 1) + { + proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, + "Addr: %u ## SUBTRACT (operand_1=%u, operand_2=%u)", + current_address, operand_1, operand_2); + } /* execute the instruction */ result = operand_1 - operand_2; lsb = result & 0xff; @@ -601,7 +656,7 @@ execute_next_instruction: case SIGCOMP_INSTR_MULTIPLY: /* 8 MULTIPLY ($operand_1, %operand_2) */ used_udvm_cycles++; - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, "Addr: %u ##MULTIPLY(8) (operand_1, operand_2)", current_address); @@ -609,17 +664,23 @@ execute_next_instruction: /* $operand_1*/ operand_address = current_address + 1; next_operand_address = dissect_udvm_reference_operand(buff, operand_address, &operand_1, &result_dest); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u operand_1 %u", operand_address, operand_1); } operand_address = next_operand_address; /* %operand_2*/ next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &operand_2); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u operand_2 %u", operand_address, operand_2); } + if (show_instr_detail_level == 1) + { + proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, + "Addr: %u ## MULTIPLY (operand_1=%u, operand_2=%u)", + current_address, operand_1, operand_2); + } /* * execute the instruction * MULTIPLY (m, n) := m * n (modulo 2^16) @@ -643,7 +704,7 @@ execute_next_instruction: case SIGCOMP_INSTR_DIVIDE: /* 9 DIVIDE ($operand_1, %operand_2) */ used_udvm_cycles++; - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, "Addr: %u ## DIVIDE(9) (operand_1, operand_2)", current_address); @@ -651,17 +712,23 @@ execute_next_instruction: /* $operand_1*/ operand_address = current_address + 1; next_operand_address = dissect_udvm_reference_operand(buff, operand_address, &operand_1, &result_dest); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u operand_1 %u", operand_address, operand_1); } operand_address = next_operand_address; /* %operand_2*/ next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &operand_2); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u operand_2 %u", operand_address, operand_2); } + if (show_instr_detail_level == 1) + { + proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, + "Addr: %u ## DIVIDE (operand_1=%u, operand_2=%u)", + current_address, operand_1, operand_2); + } /* * execute the instruction * DIVIDE (m, n) := floor(m / n) @@ -672,7 +739,7 @@ execute_next_instruction: result_code = 4; goto decompression_failure; } - result = (guint16)floor(operand_1/operand_2); + result = operand_1 / operand_2; lsb = result & 0xff; msb = result >> 8; buff[result_dest] = msb; @@ -687,7 +754,7 @@ execute_next_instruction: case SIGCOMP_INSTR_REMAINDER: /* 10 REMAINDER ($operand_1, %operand_2) */ used_udvm_cycles++; - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, "Addr: %u ## REMAINDER(10) (operand_1, operand_2)", current_address); @@ -695,17 +762,23 @@ execute_next_instruction: /* $operand_1*/ operand_address = current_address + 1; next_operand_address = dissect_udvm_reference_operand(buff, operand_address, &operand_1, &result_dest); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u operand_1 %u", operand_address, operand_1); } operand_address = next_operand_address; /* %operand_2*/ next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &operand_2); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u operand_2 %u", operand_address, operand_2); } + if (show_instr_detail_level == 1) + { + proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, + "Addr: %u ## REMAINDER (operand_1=%u, operand_2=%u)", + current_address, operand_1, operand_2); + } /* * execute the instruction * REMAINDER (m, n) := m - n * floor(m / n) @@ -716,7 +789,7 @@ execute_next_instruction: result_code = 4; goto decompression_failure; } - result = operand_1 - operand_2 * (guint16)floor(operand_1/operand_2); + result = operand_1 - operand_2 * (operand_1 / operand_2); lsb = result & 0xff; msb = result >> 8; buff[result_dest] = msb; @@ -791,7 +864,7 @@ execute_next_instruction: break; case SIGCOMP_INSTR_LOAD: /* 14 LOAD (%address, %value) */ - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, "Addr: %u ## LOAD(14) (%%address, %%value)", current_address); @@ -799,13 +872,19 @@ execute_next_instruction: operand_address = current_address + 1; /* %address */ next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &address); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u Address %u", operand_address, address); } operand_address = next_operand_address; /* %value */ next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &value); + if (show_instr_detail_level == 1) + { + proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, + "Addr: %u ## LOAD (%%address=%u, %%value=%u)", + current_address, address, value); + } lsb = value & 0xff; msb = value >> 8; @@ -829,7 +908,7 @@ execute_next_instruction: * the UDVM memory to specified values. * Hmm what if the value to load only takes one byte ? Chose to always load two bytes. */ - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, "Addr: %u ## MULTILOAD(15) (%%address, #n, value_0, ..., value_n-1)", current_address); @@ -837,7 +916,7 @@ execute_next_instruction: operand_address = current_address + 1; /* %address */ next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &address); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u Address %u", operand_address, address); } @@ -845,10 +924,16 @@ execute_next_instruction: /* #n */ next_operand_address = decode_udvm_literal_operand(buff,operand_address, &n); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u n %u", operand_address, n); } + if (show_instr_detail_level == 1) + { + proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, + "Addr: %u ## MULTILOAD (%%address=%u, #n=%u, value_0, ..., value_%d)", + current_address, address, n, n-1); + } operand_address = next_operand_address; used_udvm_cycles = used_udvm_cycles + 1 + n; while ( n > 0) { @@ -877,7 +962,7 @@ execute_next_instruction: break; case SIGCOMP_INSTR_PUSH: /* 16 PUSH (%value) */ - if (print_level_1 ){ + if (show_instr_detail_level == 2){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, "Addr: %u ## PUSH(16) (value)", current_address); @@ -885,34 +970,86 @@ execute_next_instruction: operand_address = current_address + 1; /* %value */ next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &value); - if (print_level_1 ){ + if (show_instr_detail_level == 2){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u Value %u", operand_address, value); } + if (show_instr_detail_level == 1) + { + proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, + "Addr: %u ## PUSH (value=%u)", + current_address, value); + } + current_address = next_operand_address; + + /* Push the value address onto the stack */ + stack_location = (buff[70] << 8) | buff[71]; + stack_fill = (buff[stack_location] << 8) + | buff[(stack_location+1) & 0xFFFF]; + address = (stack_location + stack_fill * 2 + 2) & 0xFFFF; + + buff[address] = (value >> 8) & 0x00FF; + buff[(address+1) & 0xFFFF] = value & 0x00FF; + + stack_fill = (stack_fill + 1) & 0xFFFF; + buff[stack_location] = (stack_fill >> 8) & 0x00FF; + buff[(stack_location+1) & 0xFFFF] = stack_fill & 0x00FF; + used_udvm_cycles++; - proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Execution of this instruction is NOT implemented"); + goto execute_next_instruction; + break; case SIGCOMP_INSTR_POP: /* 17 POP (%address) */ - if (print_level_1 ){ + if (show_instr_detail_level == 2){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, - "Addr: %u ## POP(17) (address)", + "Addr: %u ## POP(16) (value)", current_address); } operand_address = current_address + 1; - /* %address */ - next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &address); - if (print_level_1 ){ - proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u Address %u", - operand_address, address); + /* %value */ + next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &destination); + if (show_instr_detail_level == 2){ + proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u Value %u", + operand_address, destination); } - operand_address = next_operand_address; + if (show_instr_detail_level == 1) + { + proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, + "Addr: %u ## POP (address=%u)", + current_address, destination); + } + current_address = next_operand_address; + + /* Pop value from the top of the stack */ + stack_location = (buff[70] << 8) | buff[71]; + stack_fill = (buff[stack_location] << 8) + | buff[(stack_location+1) & 0xFFFF]; + if (stack_fill == 0) + { + result_code = 16; + goto decompression_failure; + } + + stack_fill = (stack_fill - 1) & 0xFFFF; + buff[stack_location] = (stack_fill >> 8) & 0x00FF; + buff[(stack_location+1) & 0xFFFF] = stack_fill & 0x00FF; + + address = (stack_location + stack_fill * 2 + 2) & 0xFFFF; + value = (buff[address] << 8) + | buff[(address+1) & 0xFFFF]; + + /* ... and store the popped value. */ + buff[destination] = (value >> 8) & 0x00FF; + buff[(destination+1) & 0xFFFF] = value & 0x00FF; + used_udvm_cycles++; - proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Execution of this instruction is NOT implemented"); + goto execute_next_instruction; + break; case SIGCOMP_INSTR_COPY: /* 18 COPY (%position, %length, %destination) */ - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, "Addr: %u ## COPY(18) (position, length, destination)", current_address); @@ -920,7 +1057,7 @@ execute_next_instruction: operand_address = current_address + 1; /* %position */ next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &position); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u position %u", operand_address, position); } @@ -928,7 +1065,7 @@ execute_next_instruction: /* %length */ next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &length); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u Length %u", operand_address, length); } @@ -936,10 +1073,16 @@ execute_next_instruction: /* %destination */ next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &destination); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u Destination %u", operand_address, destination); } + if (show_instr_detail_level == 1) + { + proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, + "Addr: %u ## COPY (position=%u, length=%u, destination=%u)", + current_address, position, length, destination); + } current_address = next_operand_address; /* * 8.4. Byte copying @@ -960,29 +1103,40 @@ execute_next_instruction: byte_copy_right = byte_copy_right | buff[67]; byte_copy_left = buff[64] << 8; byte_copy_left = byte_copy_left | buff[65]; - if (print_level_1 ){ + if (print_level_2 ){ proto_tree_add_text(udvm_tree, message_tvb, input_address, 1, " byte_copy_right = %u", byte_copy_right); } while ( n < length ){ - if ( k == byte_copy_right ){ - k = byte_copy_left; - } - buff[k] = buff[position + n]; - if (print_level_1 ){ + buff[k] = buff[position]; + if (print_level_2 ){ proto_tree_add_text(udvm_tree, message_tvb, input_address, 1, - " Copying value: %u (0x%x) to Addr: %u", buff[position + n], buff[position + n], k); + " Copying value: %u (0x%x) to Addr: %u", + buff[position], buff[position], k); } + position = ( position + 1 ) & 0xffff; k = ( k + 1 ) & 0xffff; n++; + + /* + * Check for circular buffer wrapping after the positions are + * incremented. If either started at BCR then they should continue + * to increment beyond BCR. + */ + if ( k == byte_copy_right ){ + k = byte_copy_left; + } + if ( position == byte_copy_right ){ + position = byte_copy_left; + } } used_udvm_cycles = used_udvm_cycles + 1 + length; goto execute_next_instruction; break; case SIGCOMP_INSTR_COPY_LITERAL: /* 19 COPY-LITERAL (%position, %length, $destination) */ - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, "Addr: %u ## COPY-LITERAL(19) (position, length, $destination)", current_address); @@ -990,15 +1144,15 @@ execute_next_instruction: operand_address = current_address + 1; /* %position */ next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &position); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u position %u", - operand_address, address); + operand_address, position); } operand_address = next_operand_address; /* %length */ next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &length); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u Length %u", operand_address, length); } @@ -1007,10 +1161,16 @@ execute_next_instruction: /* $destination */ next_operand_address = dissect_udvm_reference_operand(buff, operand_address, &ref_destination, &result_dest); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u destination %u", operand_address, ref_destination); } + if (show_instr_detail_level == 1) + { + proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, + "Addr: %u ## COPY-LITERAL (position=%u, length=%u, $destination=%u)", + current_address, position, length, destination); + } current_address = next_operand_address; @@ -1033,22 +1193,34 @@ execute_next_instruction: byte_copy_right = byte_copy_right | buff[67]; byte_copy_left = buff[64] << 8; byte_copy_left = byte_copy_left | buff[65]; - if (print_level_1 ){ + if (print_level_2 ){ proto_tree_add_text(udvm_tree, message_tvb, input_address, 1, " byte_copy_right = %u", byte_copy_right); } while ( n < length ){ - if ( k == byte_copy_right ){ - k = byte_copy_left; - } - buff[k] = buff[position + n]; - if (print_level_1 ){ + buff[k] = buff[position]; + if (print_level_2 ){ proto_tree_add_text(udvm_tree, message_tvb, input_address, 1, - " Copying value: %u (0x%x) to Addr: %u", buff[position + n], buff[position + n], k); + " Copying value: %u (0x%x) to Addr: %u", + buff[position], buff[position], k); } + position = ( position + 1 ) & 0xffff; k = ( k + 1 ) & 0xffff; n++; + + /* + * Check for circular buffer wrapping after the positions are + * incremented. It is important that k cannot be left set + * to BCR. Also, if either started at BCR then they should continue + * to increment beyond BCR. + */ + if ( k == byte_copy_right ){ + k = byte_copy_left; + } + if ( position == byte_copy_right ){ + position = byte_copy_left; + } } buff[result_dest] = k >> 8; buff[result_dest + 1] = k & 0x00ff; @@ -1058,7 +1230,7 @@ execute_next_instruction: break; case SIGCOMP_INSTR_COPY_OFFSET: /* 20 COPY-OFFSET (%offset, %length, $destination) */ - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, "Addr: %u ## COPY-OFFSET(20) (offset, length, $destination)", current_address); @@ -1066,7 +1238,7 @@ execute_next_instruction: operand_address = current_address + 1; /* %offset */ next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &multy_offset); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u offset %u", operand_address, multy_offset); } @@ -1074,7 +1246,7 @@ execute_next_instruction: /* %length */ next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &length); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u Length %u", operand_address, length); } @@ -1083,10 +1255,17 @@ execute_next_instruction: /* $destination */ next_operand_address = dissect_udvm_reference_operand(buff, operand_address, &ref_destination, &result_dest); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u $destination %u", operand_address, ref_destination); } + + if (show_instr_detail_level == 1) + { + proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, + "Addr: %u ## COPY-OFFSET (offset=%u, length=%u, $destination=%u)", + current_address, multy_offset, length, result_dest); + } current_address = next_operand_address; /* Execute the instruction: @@ -1102,14 +1281,26 @@ execute_next_instruction: byte_copy_right = buff[66] << 8; byte_copy_right = byte_copy_right | buff[67]; - if ( (byte_copy_left + multy_offset) > ( ref_destination )){ - /* wrap around */ - position = byte_copy_right - ( multy_offset - ( ref_destination - byte_copy_left )); - }else{ - position = ref_destination - multy_offset; + /* + * In order to work out the position, simple arithmetic is tricky + * to apply because there some nasty corner cases. A simple loop + * is inefficient but the logic is simple. + * + * FUTURE: This could be optimised. + */ + for (position = ref_destination, i = 0; i < multy_offset; i++) + { + if ( position == byte_copy_left ) + { + position = (byte_copy_right - 1) & 0xffff; + } + else + { + position = (position - 1) & 0xffff; + } } - if (print_level_1 ){ + if (print_level_2 ){ proto_tree_add_text(udvm_tree, message_tvb, input_address, 1, " byte_copy_left = %u byte_copy_right = %u position= %u", byte_copy_left, byte_copy_right, position); @@ -1134,30 +1325,33 @@ execute_next_instruction: n = 0; k = ref_destination; - byte_copy_right = buff[66] << 8; - byte_copy_right = byte_copy_right | buff[67]; - byte_copy_left = buff[64] << 8; - byte_copy_left = byte_copy_left | buff[65]; if (print_level_2 ){ proto_tree_add_text(udvm_tree, message_tvb, input_address, 1, " byte_copy_left = %u byte_copy_right = %u", byte_copy_left, byte_copy_right); } while ( n < length ){ + buff[k] = buff[position]; + if (print_level_2 ){ + proto_tree_add_text(udvm_tree, message_tvb, input_address, 1, + " Copying value: %5u (0x%x) from Addr: %u to Addr: %u", + buff[position], buff[position],(position), k); + } + n++; + k = ( k + 1 ) & 0xffff; + position = ( position + 1 ) & 0xffff; + + /* + * Check for circular buffer wrapping after the positions are + * incremented. It is important that k cannot be left set + * to BCR. Also, if either started at BCR then they should continue + * to increment beyond BCR. + */ if ( k == byte_copy_right ){ k = byte_copy_left; } if ( position == byte_copy_right ){ position = byte_copy_left; } - buff[k] = buff[position]; - if (print_level_1 ){ - proto_tree_add_text(udvm_tree, message_tvb, input_address, 1, - " Copying value: %5u (0x%x) from Addr: %u to Addr: %u", - buff[position + n], buff[position + n],(position + n), k); - } - k = ( k + 1 ) & 0xffff; - n++; - position++; } buff[result_dest] = k >> 8; buff[result_dest + 1] = k & 0x00ff; @@ -1166,7 +1360,7 @@ execute_next_instruction: break; case SIGCOMP_INSTR_MEMSET: /* 21 MEMSET (%address, %length, %start_value, %offset) */ - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, "Addr: %u ## MEMSET(21) (address, length, start_value, offset)", current_address); @@ -1175,7 +1369,7 @@ execute_next_instruction: /* %address */ next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &address); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u Address %u", operand_address, address); } @@ -1183,14 +1377,14 @@ execute_next_instruction: /* %length, */ next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &length); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u Length %u", operand_address, length); } operand_address = next_operand_address; /* %start_value */ next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &start_value); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u start_value %u", operand_address, start_value); } @@ -1198,10 +1392,16 @@ execute_next_instruction: /* %offset */ next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &multy_offset); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u offset %u", operand_address, multy_offset); } + if (show_instr_detail_level == 1) + { + proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, + "Addr: %u ## MEMSET (address=%u, length=%u, start_value=%u, offset=%u)", + current_address, address, length, start_value, multy_offset); + } current_address = next_operand_address; /* exetute the instruction * The sequence of values used by the MEMSET instruction is specified by @@ -1238,7 +1438,7 @@ execute_next_instruction: case SIGCOMP_INSTR_JUMP: /* 22 JUMP (@address) */ - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, "Addr: %u ## JUMP(22) (@address)", current_address); @@ -1247,10 +1447,16 @@ execute_next_instruction: /* @address */ /* operand_value = (memory_address_of_instruction + D) modulo 2^16 */ next_operand_address = decode_udvm_address_operand(buff,operand_address, &at_address, current_address); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u @Address %u", operand_address, at_address); } + if (show_instr_detail_level == 1) + { + proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, + "Addr: %u ## JUMP (@address=%u)", + current_address, at_address); + } current_address = at_address; used_udvm_cycles++; goto execute_next_instruction; @@ -1259,7 +1465,7 @@ execute_next_instruction: case SIGCOMP_INSTR_COMPARE: /* 23 */ /* COMPARE (%value_1, %value_2, @address_1, @address_2, @address_3) */ - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, "Addr: %u ## COMPARE(23) (value_1, value_2, @address_1, @address_2, @address_3)", current_address); @@ -1268,7 +1474,7 @@ execute_next_instruction: /* %value_1 */ next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &value_1); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u Value %u", operand_address, value_1); } @@ -1276,7 +1482,7 @@ execute_next_instruction: /* %value_2 */ next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &value_2); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u Value %u", operand_address, value_2); } @@ -1286,7 +1492,7 @@ execute_next_instruction: /* operand_value = (memory_address_of_instruction + D) modulo 2^16 */ next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &at_address_1); at_address_1 = ( current_address + at_address_1) & 0xffff; - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u @Address %u", operand_address, at_address_1); } @@ -1297,7 +1503,7 @@ execute_next_instruction: /* operand_value = (memory_address_of_instruction + D) modulo 2^16 */ next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &at_address_2); at_address_2 = ( current_address + at_address_2) & 0xffff; - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u @Address %u", operand_address, at_address_2); } @@ -1307,10 +1513,16 @@ execute_next_instruction: /* operand_value = (memory_address_of_instruction + D) modulo 2^16 */ next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &at_address_3); at_address_3 = ( current_address + at_address_3) & 0xffff; - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u @Address %u", operand_address, at_address_3); } + if (show_instr_detail_level == 1) + { + proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, + "Addr: %u ## COMPARE (value_1=%u, value_2=%u, @address_1=%u, @address_2=%u, @address_3=%u)", + current_address, value_1, value_2, at_address_1, at_address_2, at_address_3); + } /* execute the instruction * If value_1 < value_2 then the UDVM continues instruction execution at * the memory address specified by address 1. If value_1 = value_2 then @@ -1328,33 +1540,77 @@ execute_next_instruction: break; case SIGCOMP_INSTR_CALL: /* 24 CALL (@address) (PUSH addr )*/ - if (print_level_1 ){ + if (show_instr_detail_level == 2){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, "Addr: %u ## CALL(24) (@address) (PUSH addr )", current_address); } operand_address = current_address + 1; /* @address */ - next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &at_address); - at_address = ( current_address + at_address) & 0xffff; - if (print_level_1 ){ + next_operand_address = decode_udvm_address_operand(buff,operand_address, &at_address, current_address); + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u @Address %u", operand_address, at_address); - /* operand_value = (memory_address_of_instruction + D) modulo 2^16 */ } + if (show_instr_detail_level == 1) + { + proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, + "Addr: %u ## CALL (@address=%u)", + current_address, at_address); + } + current_address = next_operand_address; + + /* Push the current address onto the stack */ + stack_location = (buff[70] << 8) | buff[71]; + stack_fill = (buff[stack_location] << 8) + | buff[(stack_location+1) & 0xFFFF]; + address = (stack_location + stack_fill * 2 + 2) & 0xFFFF; + buff[address] = (current_address >> 8) & 0x00FF; + buff[(address+1) & 0xFFFF] = current_address & 0x00FF; + + stack_fill = (stack_fill + 1) & 0xFFFF; + buff[stack_location] = (stack_fill >> 8) & 0x00FF; + buff[(stack_location+1) & 0xFFFF] = stack_fill & 0x00FF; + + /* ... and jump to the destination address */ + current_address = at_address; + used_udvm_cycles++; - proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Execution of this instruction is NOT implemented"); + goto execute_next_instruction; + break; case SIGCOMP_INSTR_RETURN: /* 25 POP and return */ - if (print_level_1 ){ + if (print_level_1 || show_instr_detail_level == 1){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, "Addr: %u ## POP(25) and return", current_address); } - operand_address = current_address + 1; - proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Execution of this instruction is NOT implemented"); + + /* Pop value from the top of the stack */ + stack_location = (buff[70] << 8) | buff[71]; + stack_fill = (buff[stack_location] << 8) + | buff[(stack_location+1) & 0xFFFF]; + if (stack_fill == 0) + { + result_code = 16; + goto decompression_failure; + } + + stack_fill = (stack_fill - 1) & 0xFFFF; + buff[stack_location] = (stack_fill >> 8) & 0x00FF; + buff[(stack_location+1) & 0xFFFF] = stack_fill & 0x00FF; + + address = (stack_location + stack_fill * 2 + 2) & 0xFFFF; + at_address = (buff[address] << 8) + | buff[(address+1) & 0xFFFF]; + + /* ... and set the PC to the popped value */ + current_address = at_address; + used_udvm_cycles++; + goto execute_next_instruction; + break; case SIGCOMP_INSTR_SWITCH: /* 26 SWITCH (#n, %j, @address_0, @address_1, ... , @address_n-1) */ @@ -1415,7 +1671,7 @@ execute_next_instruction: goto decompression_failure; } used_udvm_cycles = used_udvm_cycles + 1 + n; -; + goto execute_next_instruction; break; @@ -1462,14 +1718,15 @@ execute_next_instruction: case SIGCOMP_INSTR_INPUT_BYTES: /* 28 INPUT-BYTES (%length, %destination, @address) */ - if (print_level_1 ){ - proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u ## INPUT-BYTES(28) length, destination, @address)", + if (show_instr_detail_level == 2 ){ + proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, + "Addr: %u ## INPUT-BYTES(28) length, destination, @address)", current_address); } operand_address = current_address + 1; /* %length */ next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &length); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u Length %u", operand_address, length); } @@ -1477,7 +1734,7 @@ execute_next_instruction: /* %destination */ next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &destination); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u Destination %u", operand_address, destination); } @@ -1487,23 +1744,29 @@ execute_next_instruction: /* operand_value = (memory_address_of_instruction + D) modulo 2^16 */ next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &at_address); at_address = ( current_address + at_address) & 0xffff; - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u @Address %u", operand_address, at_address); } + if (show_instr_detail_level == 1) + { + proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, + "Addr: %u ## INPUT-BYTES length=%u, destination=%u, @address=%u)", + current_address, length, destination, at_address); + } /* execute the instruction TODO insert checks * RFC 3320 : * - * 0 7 8 15 - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | byte_copy_left | 64 - 65 - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | byte_copy_right | 66 - 67 - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | input_bit_order | 68 - 69 - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | stack_location | 70 - 71 - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * 0 7 8 15 + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * | byte_copy_left | 64 - 65 + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * | byte_copy_right | 66 - 67 + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * | input_bit_order | 68 - 69 + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * | stack_location | 70 - 71 + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * * Figure 7: Memory addresses of the UDVM registers * : @@ -1580,7 +1843,7 @@ execute_next_instruction: * execution to the address specified by the address operand. */ - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, "Addr: %u ## INPUT-BITS(29) (length, destination, @address)", current_address); @@ -1589,14 +1852,14 @@ execute_next_instruction: /* %length */ next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &length); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u length %u", operand_address, length); } operand_address = next_operand_address; /* %destination */ next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &destination); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u Destination %u", operand_address, destination); } @@ -1605,10 +1868,16 @@ execute_next_instruction: /* @address */ /* operand_value = (memory_address_of_instruction + D) modulo 2^16 */ next_operand_address = decode_udvm_address_operand(buff,operand_address, &at_address, current_address); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u @Address %u", operand_address, at_address); } + if (show_instr_detail_level == 1) + { + proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, + "Addr: %u ## INPUT-BITS length=%u, destination=%u, @address=%u)", + current_address, length, destination, at_address); + } current_address = next_operand_address; /* @@ -1627,11 +1896,6 @@ execute_next_instruction: * SigComp message, no data is returned. Instead the UDVM moves program * execution to the address specified by the address operand. */ - if ((input_address > ( msg_end -1)) && (remaining_bits == 0 )){ - result_code = 11; - current_address = at_address; - goto execute_next_instruction; - } if ( length > 16 ){ result_code = 7; @@ -1641,29 +1905,29 @@ execute_next_instruction: result_code = 8; goto decompression_failure; } - if ( length > 0 ){ - /* If lengt = 0 ignore the instruction - derived from torture test 12 - * Transfer F bit to bit_order to tell decomp dispatcher which bit order to use - */ - bit_order = ( input_bit_order & 0x0004 ) >> 2; - value = decomp_dispatch_get_bits( message_tvb, udvm_tree, bit_order, - buff, &old_input_bit_order, &remaining_bits, - &input_bits, &input_address, length, &result_code, msg_end); - if ( result_code == 11 ){ - current_address = at_address; - goto execute_next_instruction; - } - msb = value >> 8; - lsb = value & 0x00ff; - buff[destination] = msb; - buff[destination + 1]=lsb; - if (print_level_1 ){ - proto_tree_add_text(udvm_tree, message_tvb, input_address, 1, - " Loading value: %u (0x%x) at Addr: %u, remaining_bits: %u", value, value, destination, remaining_bits); - } + + /* + * Transfer F bit to bit_order to tell decomp dispatcher which bit order to use + */ + bit_order = ( input_bit_order & 0x0004 ) >> 2; + value = decomp_dispatch_get_bits( message_tvb, udvm_tree, bit_order, + buff, &old_input_bit_order, &remaining_bits, + &input_bits, &input_address, length, &result_code, msg_end); + if ( result_code == 11 ){ + used_udvm_cycles = used_udvm_cycles + 1; + current_address = at_address; + goto execute_next_instruction; + } + msb = value >> 8; + lsb = value & 0x00ff; + buff[destination] = msb; + buff[destination + 1]=lsb; + if (print_level_1 ){ + proto_tree_add_text(udvm_tree, message_tvb, input_address, 1, + " Loading value: %u (0x%x) at Addr: %u, remaining_bits: %u", value, value, destination, remaining_bits); } - used_udvm_cycles = used_udvm_cycles + 1 + length; + used_udvm_cycles = used_udvm_cycles + 1; goto execute_next_instruction; break; case SIGCOMP_INSTR_INPUT_HUFFMAN: /* 30 */ @@ -1672,7 +1936,7 @@ execute_next_instruction: * %upper_bound_1, %uncompressed_1, ... , %bits_n, %lower_bound_n, * %upper_bound_n, %uncompressed_n) */ - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, "Addr: %u ## INPUT-HUFFMAN (destination, @address, #n, bits_1, lower_bound_1,upper_bound_1, uncompressed_1, ... , bits_n, lower_bound_n,upper_bound_n, uncompressed_n)", current_address); @@ -1681,7 +1945,7 @@ execute_next_instruction: /* %destination */ next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &destination); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u Destination %u", operand_address, destination); } @@ -1690,7 +1954,7 @@ execute_next_instruction: /* @address */ /* operand_value = (memory_address_of_instruction + D) modulo 2^16 */ next_operand_address = decode_udvm_address_operand(buff,operand_address, &at_address, current_address); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u @Address %u", operand_address, at_address); } @@ -1698,11 +1962,20 @@ execute_next_instruction: /* #n */ next_operand_address = decode_udvm_literal_operand(buff,operand_address, &n); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u n %u", operand_address, n); } operand_address = next_operand_address; + if (show_instr_detail_level == 1) + { + proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, + "Addr: %u ## INPUT-HUFFMAN (destination=%u, @address=%u, #n=%u, bits_1, lower_1,upper_1, unc_1, ... , bits_%d, lower_%d,upper_%d, unc_%d)", + current_address, destination, at_address, n, n, n, n, n); + } + + used_udvm_cycles = used_udvm_cycles + 1 + n; + /* * Note that if n = 0 then the INPUT-HUFFMAN instruction is ignored and * program execution resumes at the following instruction. @@ -1748,7 +2021,7 @@ execute_next_instruction: H = 0; m = n; outside_huffman_boundaries = TRUE; - print_in_loop = print_level_1; + print_in_loop = print_level_3; while ( m > 0 ){ /* %bits_n */ next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &bits_n); @@ -1782,35 +2055,34 @@ execute_next_instruction: /* execute instruction */ if ( outside_huffman_boundaries ) { /* - * 3. Set H := H * 2^bits_j + k. + * 2. Request bits_j compressed bits. Interpret the returned bits as an + * integer k from 0 to 2^bits_j - 1, as explained in Section 8.2. */ k = decomp_dispatch_get_bits( message_tvb, udvm_tree, bit_order, buff, &old_input_bit_order, &remaining_bits, &input_bits, &input_address, bits_n, &result_code, msg_end); if ( result_code == 11 ){ + /* + * 4. If data is requested that lies beyond the end of the SigComp + * message, terminate the INPUT-HUFFMAN instruction and move program + * execution to the memory address specified by the address operand. + */ current_address = at_address; goto execute_next_instruction; } - /* ldexp Returns x multiplied by 2 raised to the power of exponent. - * x*2^exponent + + /* + * 3. Set H := H * 2^bits_j + k. + * [In practice is a shift+OR operation.] */ oldH = H; - H = ( (guint16)ldexp( H, bits_n) + k ); + H = (H << bits_n) | k; if (print_level_3 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1," Set H(%u) := H(%u) * 2^bits_j(%u) + k(%u)", - H ,oldH,((guint16)pow(2,bits_n)),k); + H ,oldH, 1<<bits_n,k); } /* - * 4. If data is requested that lies beyond the end of the SigComp - * message, terminate the INPUT-HUFFMAN instruction and move program - * execution to the memory address specified by the address operand. - */ - if ( input_address > msg_end ){ - current_address = at_address; - goto execute_next_instruction; - } - /* * 5. If (H < lower_bound_j) or (H > upper_bound_j) then set j := j + 1. * Then go back to Step 2, unless j > n in which case decompression * failure occurs. @@ -1852,7 +2124,6 @@ execute_next_instruction: } current_address = next_operand_address; - used_udvm_cycles = used_udvm_cycles + 1 + n; goto execute_next_instruction; break; @@ -1860,7 +2131,7 @@ execute_next_instruction: /* STATE-ACCESS (%partial_identifier_start, %partial_identifier_length, * %state_begin, %state_length, %state_address, %state_instruction) */ - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, "Addr: %u ## STATE-ACCESS(31) (partial_identifier_start, partial_identifier_length,state_begin, state_length, state_address, state_instruction)", current_address); @@ -1871,7 +2142,7 @@ execute_next_instruction: * %partial_identifier_start */ next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &p_id_start); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u partial_identifier_start %u", operand_address, p_id_start); } @@ -1882,7 +2153,7 @@ execute_next_instruction: */ operand_address = next_operand_address; next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &p_id_length); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u partial_identifier_length %u", operand_address, p_id_length); } @@ -1891,7 +2162,7 @@ execute_next_instruction: */ operand_address = next_operand_address; next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &state_begin); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u state_begin %u", operand_address, state_begin); } @@ -1899,7 +2170,8 @@ execute_next_instruction: * %state_length */ operand_address = next_operand_address; - next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &state_length); if (print_level_1 ){ + next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &state_length); + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u state_length %u", operand_address, state_length); } @@ -1908,7 +2180,7 @@ execute_next_instruction: */ operand_address = next_operand_address; next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &state_address); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u state_address %u", operand_address, state_address); } @@ -1917,10 +2189,16 @@ execute_next_instruction: */ operand_address = next_operand_address; next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &state_instruction); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u state_instruction %u", operand_address, state_instruction); } + if (show_instr_detail_level == 1) + { + proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, + "Addr: %u ## STATE-ACCESS(31) (partial_identifier_start=%u, partial_identifier_length=%u,state_begin=%u, state_length=%u, state_address=%u, state_instruction=%u)", + current_address, p_id_start, p_id_length, state_begin, state_length, state_address, state_instruction); + } current_address = next_operand_address; byte_copy_right = buff[66] << 8; byte_copy_right = byte_copy_right | buff[67]; @@ -1932,7 +2210,7 @@ execute_next_instruction: } result_code = udvm_state_access(message_tvb, udvm_tree, buff, p_id_start, p_id_length, state_begin, &state_length, - &state_address, state_instruction, TRUE, hf_id); + &state_address, &state_instruction, hf_id); if ( result_code != 0 ){ goto decompression_failure; } @@ -1944,7 +2222,7 @@ execute_next_instruction: * STATE-CREATE (%state_length, %state_address, %state_instruction, * %minimum_access_length, %state_retention_priority) */ - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, "Addr: %u ## STATE-CREATE(32) (state_length, state_address, state_instruction,minimum_access_length, state_retention_priority)", current_address); @@ -1955,7 +2233,7 @@ execute_next_instruction: * %state_length */ next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &state_length); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u state_length %u", operand_address, state_length); } @@ -1964,7 +2242,7 @@ execute_next_instruction: */ operand_address = next_operand_address; next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &state_address); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u state_address %u", operand_address, state_address); } @@ -1973,7 +2251,7 @@ execute_next_instruction: */ operand_address = next_operand_address; next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &state_instruction); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u state_instruction %u", operand_address, state_instruction); } @@ -1983,7 +2261,7 @@ execute_next_instruction: */ operand_address = next_operand_address; next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &minimum_access_length); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u minimum_access_length %u", operand_address, minimum_access_length); } @@ -1993,10 +2271,16 @@ execute_next_instruction: */ operand_address = next_operand_address; next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &state_retention_priority); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u state_retention_priority %u", operand_address, state_retention_priority); } + if (show_instr_detail_level == 1) + { + proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, + "Addr: %u ## STATE-CREATE(32) (state_length=%u, state_address=%u, state_instruction=%u,minimum_access_length=%u, state_retention_priority=%u)", + current_address, state_length, state_address, state_instruction,minimum_access_length, state_retention_priority); + } current_address = next_operand_address; /* Execute the instruction * TODO Implement the instruction @@ -2062,7 +2346,7 @@ execute_next_instruction: /* * STATE-FREE (%partial_identifier_start, %partial_identifier_length) */ - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, "Addr: %u ## STATE-FREE (partial_identifier_start, partial_identifier_length)", current_address); @@ -2072,7 +2356,7 @@ execute_next_instruction: * %partial_identifier_start */ next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &p_id_start); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u partial_identifier_start %u", operand_address, p_id_start); } @@ -2083,10 +2367,16 @@ execute_next_instruction: */ operand_address = next_operand_address; next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &p_id_length); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u partial_identifier_length %u", operand_address, p_id_length); } + if (show_instr_detail_level == 1) + { + proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, + "Addr: %u ## STATE-FREE (partial_identifier_start=%u, partial_identifier_length=%u)", + current_address, p_id_start, p_id_length); + } current_address = next_operand_address; /* Execute the instruction: @@ -2098,7 +2388,7 @@ execute_next_instruction: goto execute_next_instruction; break; case SIGCOMP_INSTR_OUTPUT: /* 34 OUTPUT (%output_start, %output_length) */ - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, "Addr: %u ## OUTPUT(34) (output_start, output_length)", current_address); @@ -2108,7 +2398,7 @@ execute_next_instruction: * %output_start */ next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &output_start); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u output_start %u", operand_address, output_start); } @@ -2117,10 +2407,16 @@ execute_next_instruction: * %output_length */ next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &output_length); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u output_length %u", operand_address, output_length); } + if (show_instr_detail_level == 1) + { + proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, + "Addr: %u ## OUTPUT (output_start=%u, output_length=%u)", + current_address, output_start, output_length); + } current_address = next_operand_address; /* @@ -2175,7 +2471,7 @@ execute_next_instruction: * %state_instruction, %minimum_access_length, * %state_retention_priority) */ - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, "Addr: %u ## END-MESSAGE (requested_feedback_location,state_instruction, minimum_access_length,state_retention_priority)", current_address); @@ -2184,14 +2480,14 @@ execute_next_instruction: /* %requested_feedback_location */ next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &requested_feedback_location); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u requested_feedback_location %u", operand_address, requested_feedback_location); } operand_address = next_operand_address; /* returned_parameters_location */ next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &returned_parameters_location); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u returned_parameters_location %u", operand_address, returned_parameters_location); } @@ -2201,7 +2497,7 @@ execute_next_instruction: */ operand_address = next_operand_address; next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &state_length); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u state_length %u", operand_address, state_length); } @@ -2210,7 +2506,7 @@ execute_next_instruction: */ operand_address = next_operand_address; next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &state_address); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u state_address %u", operand_address, state_address); } @@ -2219,7 +2515,7 @@ execute_next_instruction: */ operand_address = next_operand_address; next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &state_instruction); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u state_instruction %u", operand_address, state_instruction); } @@ -2229,7 +2525,7 @@ execute_next_instruction: */ operand_address = next_operand_address; next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &minimum_access_length); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u minimum_access_length %u", operand_address, minimum_access_length); } @@ -2240,10 +2536,16 @@ execute_next_instruction: */ operand_address = next_operand_address; next_operand_address = decode_udvm_multitype_operand(buff, operand_address, &state_retention_priority); - if (print_level_1 ){ + if (show_instr_detail_level == 2 ){ proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1,"Addr: %u state_retention_priority %u", operand_address, state_retention_priority); } + if (show_instr_detail_level == 1) + { + proto_tree_add_text(udvm_tree, bytecode_tvb, 0, -1, + "Addr: %u ## END-MESSAGE (requested_feedback_location=%u, returned_parameters_location=%u, state_length=%u, state_address=%u, state_instruction=%u, minimum_access_length=%u, state_retention_priority=%u)", + current_address, requested_feedback_location, returned_parameters_location, state_length, state_address, state_instruction, minimum_access_length,state_retention_priority); + } current_address = next_operand_address; /* TODO: This isn't currently totaly correct as END_INSTRUCTION might not create state */ no_of_state_create++; @@ -2565,7 +2867,7 @@ decode_udvm_multitype_operand(guint8 *buff,guint operand_address, guint16 *value * 10001nnn 2 ^ (N + 8) 256 , ... , 32768 */ - result = (guint32)pow(2,( buff[operand_address] & 0x07) + 8); + result = 1 << ((buff[operand_address] & 0x07) + 8); operand = result & 0xffff; *value = operand; offset ++; @@ -2575,7 +2877,7 @@ decode_udvm_multitype_operand(guint8 *buff,guint operand_address, guint16 *value /* * 1000 011n 2 ^ (N + 6) 64 , 128 */ - result = (guint32)pow(2,( buff[operand_address] & 0x01) + 6); + result = 1 << ((buff[operand_address] & 0x01) + 6); operand = result & 0xffff; *value = operand; offset ++; @@ -2665,303 +2967,144 @@ decode_udvm_address_operand(guint8 *buff,guint operand_address, guint16 *value,g return next_opreand_address; } -static int -decomp_dispatch_get_bits(tvbuff_t *message_tvb,proto_tree *udvm_tree,guint8 bit_order, - guint8 *buff,guint16 *old_input_bit_order, guint16 *remaining_bits, - guint16 *input_bits, guint *input_address, guint16 length, - guint16 *result_code,guint msg_end){ - -guint16 input_bit_order; -guint16 value; -guint16 mask; -guint8 octet; -guint8 n; -guint8 i; +/* + * This is a lookup table used to reverse the bits in a byte. + */ +static guint8 reverse [] = { + 0x00, 0x80, 0x40, 0xC0, 0x20, 0xA0, 0x60, 0xE0, + 0x10, 0x90, 0x50, 0xD0, 0x30, 0xB0, 0x70, 0xF0, + 0x08, 0x88, 0x48, 0xC8, 0x28, 0xA8, 0x68, 0xE8, + 0x18, 0x98, 0x58, 0xD8, 0x38, 0xB8, 0x78, 0xF8, + 0x04, 0x84, 0x44, 0xC4, 0x24, 0xA4, 0x64, 0xE4, + 0x14, 0x94, 0x54, 0xD4, 0x34, 0xB4, 0x74, 0xF4, + 0x0C, 0x8C, 0x4C, 0xCC, 0x2C, 0xAC, 0x6C, 0xEC, + 0x1C, 0x9C, 0x5C, 0xDC, 0x3C, 0xBC, 0x7C, 0xFC, + 0x02, 0x82, 0x42, 0xC2, 0x22, 0xA2, 0x62, 0xE2, + 0x12, 0x92, 0x52, 0xD2, 0x32, 0xB2, 0x72, 0xF2, + 0x0A, 0x8A, 0x4A, 0xCA, 0x2A, 0xAA, 0x6A, 0xEA, + 0x1A, 0x9A, 0x5A, 0xDA, 0x3A, 0xBA, 0x7A, 0xFA, + 0x06, 0x86, 0x46, 0xC6, 0x26, 0xA6, 0x66, 0xE6, + 0x16, 0x96, 0x56, 0xD6, 0x36, 0xB6, 0x76, 0xF6, + 0x0E, 0x8E, 0x4E, 0xCE, 0x2E, 0xAE, 0x6E, 0xEE, + 0x1E, 0x9E, 0x5E, 0xDE, 0x3E, 0xBE, 0x7E, 0xFE, + 0x01, 0x81, 0x41, 0xC1, 0x21, 0xA1, 0x61, 0xE1, + 0x11, 0x91, 0x51, 0xD1, 0x31, 0xB1, 0x71, 0xF1, + 0x09, 0x89, 0x49, 0xC9, 0x29, 0xA9, 0x69, 0xE9, + 0x19, 0x99, 0x59, 0xD9, 0x39, 0xB9, 0x79, 0xF9, + 0x05, 0x85, 0x45, 0xC5, 0x25, 0xA5, 0x65, 0xE5, + 0x15, 0x95, 0x55, 0xD5, 0x35, 0xB5, 0x75, 0xF5, + 0x0D, 0x8D, 0x4D, 0xCD, 0x2D, 0xAD, 0x6D, 0xED, + 0x1D, 0x9D, 0x5D, 0xDD, 0x3D, 0xBD, 0x7D, 0xFD, + 0x03, 0x83, 0x43, 0xC3, 0x23, 0xA3, 0x63, 0xE3, + 0x13, 0x93, 0x53, 0xD3, 0x33, 0xB3, 0x73, 0xF3, + 0x0B, 0x8B, 0x4B, 0xCB, 0x2B, 0xAB, 0x6B, 0xEB, + 0x1B, 0x9B, 0x5B, 0xDB, 0x3B, 0xBB, 0x7B, 0xFB, + 0x07, 0x87, 0x47, 0xC7, 0x27, 0xA7, 0x67, 0xE7, + 0x17, 0x97, 0x57, 0xD7, 0x37, 0xB7, 0x77, 0xF7, + 0x0F, 0x8F, 0x4F, 0xCF, 0x2F, 0xAF, 0x6F, 0xEF, + 0x1F, 0x9F, 0x5F, 0xDF, 0x3F, 0xBF, 0x7F, 0xFF +}; - input_bit_order = buff[68] << 8; - input_bit_order = input_bit_order | buff[69]; - *result_code = 0; - - /* - * Note that after one or more INPUT instructions the dispatcher may - * hold a fraction of a byte (what used to be the LSBs if P = 0, or, the - * MSBs, if P = 1). If an INPUT instruction is encountered and the P- - * bit has changed since the last INPUT instruction, any fraction of a - * byte still held by the dispatcher MUST be discarded (even if the - * INPUT instruction requests zero bits). The first bit passed to the - * INPUT instruction is taken from the subsequent byte. - */ - if (print_level_1 ){ - if ( *input_address > ( msg_end - 1)){ - proto_tree_add_text(udvm_tree, message_tvb, (msg_end - 1), 1, - " input_bit_order = 0x%x, old_input_bit_order = 0x%x MSG BUFFER END", input_bit_order, *old_input_bit_order); - }else{ - proto_tree_add_text(udvm_tree, message_tvb, *input_address, 1, - " input_bit_order = 0x%x, old_input_bit_order = 0x%x", input_bit_order,*old_input_bit_order); - } - } - - if ( (*old_input_bit_order & 0x0001 ) != ( input_bit_order & 0x0001 )){ - /* clear out remaining bits TODO check this further */ - *remaining_bits = 0; - *old_input_bit_order = input_bit_order; - } +static int +decomp_dispatch_get_bits( + tvbuff_t *message_tvb, + proto_tree *udvm_tree, + guint8 bit_order, + guint8 *buff, + guint16 *old_input_bit_order, + guint16 *remaining_bits, + guint16 *input_bits, + guint *input_address, + guint16 length, + guint16 *result_code, + guint msg_end) +{ + guint16 input_bit_order; + guint16 bits_still_required = length; + guint16 value = 0; + guint8 octet; + gint extra_bytes_available = msg_end - *input_address; + gint p_bit; + gint prev_p_bit = *old_input_bit_order & 0x0001; + gint bits_to_use = 0; - /* - * Do we hold a fraction of a byte ? - */ - if ( *remaining_bits != 0 ){ - if ( *remaining_bits < length ){ - if (*remaining_bits > 8 ){ - proto_tree_add_text(udvm_tree, message_tvb, *input_address, 1, - " Yikes!! haven't coded this case yet!!remaining_bits %u > 8 ", *remaining_bits); - return 0xfbad; - } - if ( *input_address > ( msg_end -1 ) ){ - *result_code = 11; - return 0xfbad; - } - octet = tvb_get_guint8(message_tvb, *input_address); - if (print_level_1 ){ - proto_tree_add_text(udvm_tree, message_tvb, *input_address , 1, - " Geting value: %u (0x%x) From Addr: %u", octet, octet, *input_address); - } - *input_address = *input_address + 1; + input_bit_order = buff[68] << 8; + input_bit_order = input_bit_order | buff[69]; + *result_code = 0; + p_bit = (input_bit_order & 0x0001) != 0; - if ((input_bit_order & 0x0001)==0){ - /* - * P bit = 0 - */ - /* borrow value */ - value = octet & 0x00ff; - value = value << ( 8 - (*remaining_bits)); - *remaining_bits = *remaining_bits + 8; - }else{ - /* - * P bit = 1 - */ - /* borrow value */ - value = ( octet << 7) & 0x80; - value = value | (( octet << 5) & 0x40 ); - value = value | (( octet << 3) & 0x20 ); - value = value | (( octet << 1) & 0x10 ); - - value = value | (( octet >> 1) & 0x08 ); - value = value | (( octet >> 3) & 0x04 ); - value = value | (( octet >> 5) & 0x02 ); - value = value | (( octet >> 7) & 0x01 ); - - value = value << ( 8 - (*remaining_bits)); - *remaining_bits = *remaining_bits + 8; - } + /* + * Discard any spare bits. + * Note: We take care to avoid remaining_bits having the value of 8. + */ + if (prev_p_bit != p_bit) + { + *remaining_bits = 0; + *old_input_bit_order = input_bit_order; + } - if (print_level_1 ){ - proto_tree_add_text(udvm_tree, message_tvb, *input_address - 1 , 1, - " Or value 0x%x with 0x%x remaining bits %u, Result 0x%x", - value, *input_bits, *remaining_bits, (*input_bits | value)); - } - *input_bits = *input_bits | value; - }/* Bits remain */ - if ( ( bit_order ) == 0 ){ - /* - * F/H bit = 0 - */ - mask = (0xffff >> length)^0xffff; - value = *input_bits & mask; - value = value >> ( 16 - length); - *input_bits = *input_bits << length; - *remaining_bits = *remaining_bits - length; - if (print_level_1 ){ - proto_tree_add_text(udvm_tree, message_tvb, *input_address, 1, - " Remaining input_bits 0x%x remaining_bits %u", *input_bits, *remaining_bits); - } - return value; - } - else{ - /* - * F/H bit = 1 - */ - n = 15; - i = 0; - value = 0; - while ( i < length ){ - value = value | (( *input_bits & 0x8000 ) >> n) ; - *input_bits = *input_bits << 1; - n--; - i++; - } - *remaining_bits = *remaining_bits - length; - if (print_level_1 ){ - proto_tree_add_text(udvm_tree, message_tvb, *input_address, 1, - " Remaining input_bits 0x%x", *input_bits); - } - return value; - } + /* + * Check we can suppy the required number of bits now, before we alter + * the input buffer's state. + */ + if (*remaining_bits + extra_bytes_available * 8 < length) + { + *result_code = 11; + return 0xfbad; + } - } - else + /* Note: This is never called with length > 16, so the following loop + * never loops more than three time. */ + while (bits_still_required > 0) + { + /* + * We only put anything into input_bits if we know we will remove + * at least one bit. That ensures we can simply discard the spare + * bits if the P-bit changes. + */ + if (*remaining_bits == 0) { - /* - * Do we need one or two bytes ? - */ - if ( *input_address > ( msg_end -1 ) ){ - *result_code = 11; - return 0xfbad; + octet = tvb_get_guint8(message_tvb, *input_address); + if (print_level_1 ){ + proto_tree_add_text(udvm_tree, message_tvb, *input_address , 1, + " Geting value: %u (0x%x) From Addr: %u", octet, octet, *input_address); } + *input_address = *input_address + 1; - if ( length < 9 ){ - octet = tvb_get_guint8(message_tvb, *input_address); - if (print_level_1 ){ - proto_tree_add_text(udvm_tree, message_tvb, *input_address , 1, - " Geting value: %u (0x%x) From Addr: %u", octet, octet, *input_address); - } - *input_address = *input_address + 1; - if (print_level_1 ){ - proto_tree_add_text(udvm_tree, message_tvb, *input_address , 1, - " Next input from Addr: %u", *input_address); - } - - if ( ( input_bit_order & 0x0001 ) == 0 ){ - /* - * P bit = Zero - */ - *input_bits = octet & 0xff; - *input_bits = *input_bits << 8; - *remaining_bits = 8; - }else{ - /* - * P bit = One - */ - *input_bits = ( octet << 7) & 0x80; - *input_bits = *input_bits | (( octet << 5) & 0x40 ); - *input_bits = *input_bits | (( octet << 3) & 0x20 ); - *input_bits = *input_bits | (( octet << 1) & 0x10 ); - - *input_bits = *input_bits | (( octet >> 1) & 0x08 ); - *input_bits = *input_bits | (( octet >> 3) & 0x04 ); - *input_bits = *input_bits | (( octet >> 5) & 0x02 ); - *input_bits = *input_bits | (( octet >> 7) & 0x01 ); - - *input_bits = *input_bits << 8; - *remaining_bits = 8; - proto_tree_add_text(udvm_tree, message_tvb, *input_address -1, 1, - " P bit = 1, input_bits = 0x%x",*input_bits); - - } - + if (p_bit != 0) + { + octet = reverse[octet]; } - else{ - /* Length > 9, we need two bytes */ - octet = tvb_get_guint8(message_tvb, *input_address); - if (print_level_1 ){ - proto_tree_add_text(udvm_tree, message_tvb, *input_address, 1, - " Geting first value: %u (0x%x) From Addr: %u", octet, octet, *input_address); - } - if ( ( input_bit_order & 0x0001 ) == 0 ){ - *input_bits = octet & 0xff; - *input_bits = *input_bits << 8; - *input_address = *input_address + 1; - }else{ - /* - * P bit = One - */ - *input_bits = ( octet << 7) & 0x80; - *input_bits = *input_bits | (( octet << 5) & 0x40 ); - *input_bits = *input_bits | (( octet << 3) & 0x20 ); - *input_bits = *input_bits | (( octet << 1) & 0x10 ); + *input_bits = octet; + *remaining_bits = 8; + } - *input_bits = *input_bits | (( octet >> 1) & 0x08 ); - *input_bits = *input_bits | (( octet >> 3) & 0x04 ); - *input_bits = *input_bits | (( octet >> 5) & 0x02 ); - *input_bits = *input_bits | (( octet >> 7) & 0x01 ); + /* Add some more bits to the accumulated value. */ + bits_to_use = bits_still_required < *remaining_bits ? bits_still_required : *remaining_bits; + bits_still_required -= bits_to_use; - *input_bits = *input_bits << 8; - *input_address = *input_address + 1; - proto_tree_add_text(udvm_tree, message_tvb, *input_address -1, 1, - " P bit = 1, input_bits = 0x%x",*input_bits); + *input_bits <<= bits_to_use; /* Shift bits into MSByte */ + value = (value << bits_to_use) /* Then add to the accumulated value */ + | ((*input_bits >> 8) & 0xFF); + *remaining_bits -= bits_to_use; + *input_bits &= 0x00FF; /* Leave just the remaining bits */ + } - } + if (bit_order != 0) + { + /* Bit reverse the entire word. */ + guint16 lsb = reverse[(value >> 8) & 0xFF]; + guint16 msb = reverse[value & 0xFF]; - if ( *input_address > ( msg_end - 1)){ - *result_code = 11; - return 0xfbad; - } + value = ((msb << 8) | lsb) >> (16 - length); + } - octet = tvb_get_guint8(message_tvb, *input_address); - *input_address = *input_address + 1; - if (print_level_1 ){ - proto_tree_add_text(udvm_tree, message_tvb, *input_address - 2, 2, - " Geting second value: %u (0x%x) From Addr: %u", octet, octet, *input_address); - } - if ( ( input_bit_order & 0x0001 ) == 0 ){ - /* - * P bit = zero - */ - *input_bits = *input_bits | octet; - *remaining_bits = 16; - }else{ - /* - * P bit = One - */ - *input_bits = ( octet << 7) & 0x80; - *input_bits = *input_bits | (( octet << 5) & 0x40 ); - *input_bits = *input_bits | (( octet << 3) & 0x20 ); - *input_bits = *input_bits | (( octet << 1) & 0x10 ); - - *input_bits = *input_bits | (( octet >> 1) & 0x08 ); - *input_bits = *input_bits | (( octet >> 3) & 0x04 ); - *input_bits = *input_bits | (( octet >> 5) & 0x02 ); - *input_bits = *input_bits | (( octet >> 7) & 0x01 ); - - *input_bits = *input_bits << 8; - *input_address = *input_address + 1; - proto_tree_add_text(udvm_tree, message_tvb, *input_address -1, 1, - " P bit = 1, input_bits = 0x%x",*input_bits); - - *remaining_bits = 16; - } + return value; +} - } - if ( ( bit_order ) == 0 ){ - /* - * F/H bit = 0 - */ - mask = (0xffff >> length)^0xffff; - value = *input_bits & mask; - value = value >> ( 16 - length); - *input_bits = *input_bits << length; - *remaining_bits = *remaining_bits - length; - if (print_level_1 ){ - proto_tree_add_text(udvm_tree, message_tvb, *input_address, 1, - " Remaining input_bits 0x%x", *input_bits); - } - return value; - } - else{ - /* - * F/H bit = 1 - */ - n = 15; - i = 0; - value = 0; - while ( i < length ){ - value = value | ( *input_bits & 0x8000 ) >> n ; - *input_bits = *input_bits << 1; - n--; - i++; - } - *remaining_bits = *remaining_bits - length; - if (print_level_1 ){ - proto_tree_add_text(udvm_tree, message_tvb, *input_address, 1, - " Remaining input_bits 0x%x", *input_bits); - } - return value; - } - } -} /* end udvm */ diff --git a/epan/sigcomp-udvm.h b/epan/sigcomp-udvm.h index 6c7e61a6f6..98c731eba3 100644 --- a/epan/sigcomp-udvm.h +++ b/epan/sigcomp-udvm.h @@ -36,7 +36,9 @@ #define UDVM_MEMORY_SIZE 65536 extern tvbuff_t* decompress_sigcomp_message(tvbuff_t *bytecode_tvb, tvbuff_t *message_tvb, packet_info *pinfo, - proto_tree *tree, gint destination, gint print_flags, gint hf_id); + proto_tree *tree, gint destination, + gint print_flags, gint hf_id, gint header_len, + gint byte_code_state_len, gint byte_code_id_len); diff --git a/epan/sigcomp_state_hdlr.c b/epan/sigcomp_state_hdlr.c index 517bc29fb5..af87e19cf0 100644 --- a/epan/sigcomp_state_hdlr.c +++ b/epan/sigcomp_state_hdlr.c @@ -1,668 +1,626 @@ -/* sigcomp_state_hdlr.c
- * Routines making up the State handler of the Univerasl Decompressor Virtual Machine (UDVM)
- * used for Signaling Compression (SigComp) dissection.
- * Copyright 2004, Anders Broman <anders.broman@ericsson.com>
- *
- * $Id: sigcomp_state_hdlr.c 12788 2004-12-20 10:56:25Z jmayer $
- *
- * Ethereal - Network traffic analyzer
- * By Gerald Combs <gerald@ethereal.com>
- * Copyright 1998 Gerald Combs
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- * References:
- * The Session Initiation Protocol (SIP) and Session Description Protocol
- * (SDP) Static Dictionary for Signaling Compression (SigComp)
- * http://www.ietf.org/rfc/rfc3485.txt?number=3485
- *
- * http://www.ietf.org/rfc/rfc3320.txt?number=3320
- * http://www.ietf.org/rfc/rfc3321.txt?number=3321
- * Useful links :
- * http://www.ietf.org/internet-drafts/draft-ietf-rohc-sigcomp-impl-guide-03.txt
- * http://www.ietf.org/internet-drafts/draft-ietf-rohc-sigcomp-sip-01.txt
- */
-
-#ifdef HAVE_CONFIG_H
-# include "config.h"
-#endif
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <math.h>
-#include <glib.h>
-#include "strutil.h"
-
-#ifdef NEED_SNPRINTF_H
-# include "snprintf.h"
-#endif
-
-#include "packet.h"
-#include "sigcomp_state_hdlr.h"
-/*
- * Defenitions for:
- * The Session Initiation Protocol (SIP) and Session Description Protocol
- * (SDP) Static Dictionary for Signaling Compression (SigComp)
- * http://www.ietf.org/rfc/rfc3485.txt?number=3485
- */
-guint16 sip_sdp_state_length = 0x12e4;
-
-static const guint8 sip_sdp_state_identifier[20] =
-{
- /* -0000, */ 0xfb, 0xe5, 0x07, 0xdf, 0xe5, 0xe6, 0xaa, 0x5a, 0xf2, 0xab, 0xb9, 0x14, 0xce, 0xaa, 0x05, 0xf9,
- /* -0010, */ 0x9c, 0xe6, 0x1b, 0xa5
-};
-
-static const guint8 sip_sdp_static_dictionaty_for_sigcomp[0x12e4] =
-{
-
- /* -0000, */ 0x0d, 0x0a, 0x52, 0x65, 0x6a, 0x65, 0x63, 0x74, 0x2d, 0x43, 0x6f, 0x6e, 0x74, 0x61, 0x63, 0x74,
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- /* -0CE0, */ 0x3a, 0x0d, 0x0a, 0x43, 0x6f, 0x6e, 0x74, 0x65, 0x6e, 0x74, 0x2d, 0x4c, 0x65, 0x6e, 0x67, 0x74,
- /* -0CF0, */ 0x68, 0x3a, 0x20, 0x4f, 0x63, 0x74, 0x20, 0x0d, 0x0a, 0x56, 0x69, 0x61, 0x3a, 0x20, 0x53, 0x49,
- /* -0D00, */ 0x50, 0x2f, 0x32, 0x2e, 0x30, 0x2f, 0x55, 0x44, 0x50, 0x20, 0x3b, 0x63, 0x6f, 0x6d, 0x70, 0x3d,
- /* -0D10, */ 0x73, 0x69, 0x67, 0x63, 0x6f, 0x6d, 0x70, 0x72, 0x6f, 0x62, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x61,
- /* -0D20, */ 0x63, 0x6b, 0x3b, 0x62, 0x72, 0x61, 0x6e, 0x63, 0x68, 0x3d, 0x7a, 0x39, 0x68, 0x47, 0x34, 0x62,
- /* -0D30, */ 0x4b, 0x0d, 0x0a, 0x4d, 0x61, 0x78, 0x2d, 0x46, 0x6f, 0x72, 0x77, 0x61, 0x72, 0x64, 0x73, 0x3a,
- /* -0D40, */ 0x20, 0x41, 0x70, 0x72, 0x20, 0x53, 0x43, 0x54, 0x50, 0x52, 0x41, 0x43, 0x4b, 0x20, 0x49, 0x4e,
- /* -0D50, */ 0x56, 0x49, 0x54, 0x45, 0x20, 0x0d, 0x0a, 0x43, 0x61, 0x6c, 0x6c, 0x2d, 0x49, 0x44, 0x3a, 0x20,
- /* -0D60, */ 0x0d, 0x0a, 0x43, 0x6f, 0x6e, 0x74, 0x61, 0x63, 0x74, 0x3a, 0x20, 0x32, 0x30, 0x30, 0x20, 0x4f,
- /* -0D70, */ 0x4b, 0x0d, 0x0a, 0x46, 0x72, 0x6f, 0x6d, 0x3a, 0x20, 0x0d, 0x0a, 0x43, 0x53, 0x65, 0x71, 0x3a,
- /* -0D80, */ 0x20, 0x0d, 0x0a, 0x54, 0x6f, 0x3a, 0x20, 0x3b, 0x74, 0x61, 0x67, 0x3d, 0x04, 0x10, 0xdd, 0x10,
- /* -0D90, */ 0x11, 0x31, 0x0d, 0x11, 0x0a, 0x07, 0x10, 0xb9, 0x0c, 0x10, 0xfe, 0x12, 0x10, 0xe1, 0x06, 0x11,
- /* -0DA0, */ 0x4e, 0x07, 0x11, 0x4e, 0x03, 0x11, 0x4a, 0x04, 0x11, 0x4a, 0x07, 0x10, 0xb2, 0x08, 0x11, 0x79,
- /* -0DB0, */ 0x06, 0x11, 0x81, 0x0f, 0x11, 0x22, 0x0b, 0x11, 0x55, 0x06, 0x11, 0x6b, 0x0b, 0x11, 0x60, 0x13,
- /* -0DC0, */ 0x10, 0xb2, 0x08, 0x11, 0x71, 0x05, 0x11, 0x87, 0x13, 0x10, 0xf7, 0x09, 0x0e, 0x8d, 0x08, 0x0d,
- /* -0DD0, */ 0xae, 0x0c, 0x10, 0xb9, 0x07, 0x10, 0x8e, 0x03, 0x0d, 0x96, 0x03, 0x10, 0x8a, 0x04, 0x10, 0x8a,
- /* -0DE0, */ 0x09, 0x0d, 0xd7, 0x0a, 0x0f, 0x12, 0x08, 0x0f, 0x8f, 0x09, 0x0f, 0x8f, 0x08, 0x0d, 0x6c, 0x06,
- /* -0DF0, */ 0x0e, 0x66, 0x09, 0x0e, 0x6c, 0x0a, 0x0e, 0x6c, 0x06, 0x0f, 0xc6, 0x07, 0x0f, 0xc6, 0x05, 0x11,
- /* -0E00, */ 0x48, 0x06, 0x11, 0x48, 0x06, 0x0f, 0xbf, 0x07, 0x0f, 0xbf, 0x07, 0x0e, 0x55, 0x06, 0x0f, 0x16,
- /* -0E10, */ 0x04, 0x0e, 0xf4, 0x03, 0x0e, 0xb1, 0x03, 0x10, 0xa6, 0x09, 0x10, 0x50, 0x03, 0x10, 0xa3, 0x0a,
- /* -0E20, */ 0x0d, 0xb4, 0x05, 0x0e, 0x36, 0x06, 0x0e, 0xd6, 0x03, 0x0d, 0xf9, 0x11, 0x0e, 0xf8, 0x04, 0x0c,
- /* -0E30, */ 0xd9, 0x08, 0x0e, 0xea, 0x04, 0x09, 0x53, 0x03, 0x0a, 0x4b, 0x04, 0x0e, 0xe4, 0x10, 0x0f, 0x35,
- /* -0E40, */ 0x09, 0x0e, 0xe4, 0x08, 0x0d, 0x3f, 0x03, 0x0f, 0xe1, 0x0b, 0x10, 0x01, 0x03, 0x10, 0xac, 0x06,
- /* -0E50, */ 0x10, 0x95, 0x0c, 0x0e, 0x76, 0x0b, 0x0f, 0xeb, 0x0a, 0x0f, 0xae, 0x05, 0x10, 0x2b, 0x04, 0x10,
- /* -0E60, */ 0x2b, 0x08, 0x10, 0x7a, 0x10, 0x0f, 0x49, 0x07, 0x0f, 0xb8, 0x09, 0x10, 0x3e, 0x0b, 0x10, 0x0c,
- /* -0E70, */ 0x07, 0x0f, 0x78, 0x0b, 0x0f, 0x6d, 0x09, 0x10, 0x47, 0x08, 0x10, 0x82, 0x0b, 0x0f, 0xf6, 0x08,
- /* -0E80, */ 0x10, 0x62, 0x08, 0x0f, 0x87, 0x08, 0x10, 0x6a, 0x04, 0x0f, 0x78, 0x0d, 0x0f, 0xcd, 0x08, 0x0d,
- /* -0E90, */ 0xae, 0x10, 0x0f, 0x5d, 0x0b, 0x0f, 0x98, 0x14, 0x0d, 0x20, 0x1b, 0x0d, 0x20, 0x04, 0x0d, 0xe0,
- /* -0EA0, */ 0x14, 0x0e, 0xb4, 0x0b, 0x0f, 0xa3, 0x0b, 0x07, 0x34, 0x0f, 0x0d, 0x56, 0x04, 0x0e, 0xf4, 0x03,
- /* -0EB0, */ 0x10, 0xaf, 0x07, 0x0d, 0x34, 0x09, 0x0f, 0x27, 0x04, 0x10, 0x9b, 0x04, 0x10, 0x9f, 0x09, 0x10,
- /* -0EC0, */ 0x59, 0x08, 0x10, 0x72, 0x09, 0x10, 0x35, 0x0a, 0x10, 0x21, 0x0a, 0x10, 0x17, 0x08, 0x0f, 0xe3,
- /* -0ED0, */ 0x03, 0x10, 0xa9, 0x05, 0x0c, 0xac, 0x04, 0x0c, 0xbd, 0x07, 0x0c, 0xc1, 0x08, 0x0c, 0xc1, 0x09,
- /* -0EE0, */ 0x0c, 0xf6, 0x10, 0x0c, 0x72, 0x0c, 0x0c, 0x86, 0x04, 0x0d, 0x64, 0x0c, 0x0c, 0xd5, 0x09, 0x0c,
- /* -0EF0, */ 0xff, 0x1b, 0x0b, 0xfc, 0x11, 0x0c, 0x5d, 0x13, 0x0c, 0x30, 0x09, 0x0c, 0xa4, 0x0c, 0x0c, 0x24,
- /* -0F00, */ 0x0c, 0x0d, 0x3b, 0x03, 0x0d, 0x1a, 0x03, 0x0d, 0x1d, 0x16, 0x0c, 0x43, 0x09, 0x0c, 0x92, 0x09,
- /* -0F10, */ 0x0c, 0x9b, 0x0d, 0x0e, 0xcb, 0x04, 0x0d, 0x16, 0x06, 0x0d, 0x10, 0x05, 0x04, 0xf2, 0x0b, 0x0c,
- /* -0F20, */ 0xe1, 0x05, 0x0b, 0xde, 0x0a, 0x0c, 0xec, 0x13, 0x0b, 0xe3, 0x07, 0x0b, 0xd4, 0x08, 0x0d, 0x08,
- /* -0F30, */ 0x0c, 0x0c, 0xc9, 0x09, 0x0c, 0x3a, 0x04, 0x0a, 0xe5, 0x0c, 0x0a, 0x23, 0x08, 0x0b, 0x3a, 0x0e,
- /* -0F40, */ 0x09, 0xab, 0x0f, 0x0e, 0xfa, 0x09, 0x0f, 0x6f, 0x0c, 0x0a, 0x17, 0x0f, 0x09, 0x76, 0x0c, 0x0a,
- /* -0F50, */ 0x5f, 0x17, 0x0d, 0xe2, 0x0f, 0x07, 0xa8, 0x0a, 0x0f, 0x85, 0x0f, 0x08, 0xd6, 0x0e, 0x09, 0xb9,
- /* -0F60, */ 0x0b, 0x0a, 0x7a, 0x03, 0x0b, 0xdb, 0x03, 0x08, 0xc1, 0x04, 0x0e, 0xc7, 0x03, 0x08, 0xd3, 0x02,
- /* -0F70, */ 0x04, 0x8d, 0x08, 0x0b, 0x4a, 0x05, 0x0b, 0x8c, 0x07, 0x0b, 0x61, 0x06, 0x05, 0x48, 0x04, 0x07,
- /* -0F80, */ 0xf4, 0x05, 0x10, 0x30, 0x04, 0x07, 0x1e, 0x08, 0x07, 0x1e, 0x05, 0x0b, 0x91, 0x10, 0x04, 0xca,
- /* -0F90, */ 0x09, 0x0a, 0x71, 0x09, 0x0e, 0x87, 0x05, 0x04, 0x98, 0x05, 0x0b, 0x6e, 0x0b, 0x04, 0x9b, 0x0f,
- /* -0FA0, */ 0x04, 0x9b, 0x07, 0x04, 0x9b, 0x03, 0x04, 0xa3, 0x07, 0x04, 0xa3, 0x10, 0x07, 0x98, 0x09, 0x07,
- /* -0FB0, */ 0x98, 0x05, 0x0b, 0x73, 0x05, 0x0b, 0x78, 0x05, 0x0b, 0x7d, 0x05, 0x07, 0xb9, 0x05, 0x0b, 0x82,
- /* -0FC0, */ 0x05, 0x0b, 0x87, 0x05, 0x0b, 0x1d, 0x05, 0x08, 0xe4, 0x05, 0x0c, 0x81, 0x05, 0x0f, 0x44, 0x05,
- /* -0FD0, */ 0x11, 0x40, 0x05, 0x08, 0x78, 0x05, 0x08, 0x9d, 0x05, 0x0f, 0x58, 0x05, 0x07, 0x3f, 0x05, 0x0c,
- /* -0FE0, */ 0x6d, 0x05, 0x10, 0xf2, 0x05, 0x0c, 0x58, 0x05, 0x06, 0xa9, 0x04, 0x07, 0xb6, 0x09, 0x05, 0x8c,
- /* -0FF0, */ 0x06, 0x06, 0x1a, 0x06, 0x0e, 0x81, 0x0a, 0x06, 0x16, 0x0a, 0x0a, 0xc4, 0x07, 0x0b, 0x5a, 0x0a,
- /* -1000, */ 0x0a, 0xba, 0x03, 0x0b, 0x1b, 0x04, 0x11, 0x45, 0x06, 0x0c, 0x8c, 0x07, 0x05, 0xad, 0x0a, 0x0e,
- /* -1010, */ 0xda, 0x08, 0x0b, 0x42, 0x0d, 0x09, 0xf7, 0x0b, 0x05, 0x1c, 0x09, 0x11, 0x16, 0x08, 0x05, 0xc9,
- /* -1020, */ 0x07, 0x0d, 0x86, 0x06, 0x0b, 0xcf, 0x0a, 0x06, 0x4d, 0x04, 0x0b, 0xa2, 0x06, 0x06, 0x8d, 0x08,
- /* -1030, */ 0x05, 0xe6, 0x08, 0x0e, 0x11, 0x0b, 0x0a, 0x9b, 0x03, 0x0a, 0x04, 0x03, 0x0b, 0xb5, 0x05, 0x10,
- /* -1040, */ 0xd7, 0x04, 0x09, 0x94, 0x05, 0x0a, 0xe2, 0x03, 0x0b, 0xb2, 0x06, 0x0d, 0x67, 0x04, 0x0d, 0x11,
- /* -1050, */ 0x08, 0x08, 0xb7, 0x1b, 0x0e, 0x3b, 0x0a, 0x09, 0xa1, 0x14, 0x04, 0x85, 0x15, 0x07, 0x83, 0x15,
- /* -1060, */ 0x07, 0x6e, 0x0d, 0x09, 0x3d, 0x17, 0x06, 0xae, 0x0f, 0x07, 0xe6, 0x14, 0x07, 0xbe, 0x0d, 0x06,
- /* -1070, */ 0x0a, 0x0d, 0x09, 0x30, 0x16, 0x06, 0xf2, 0x12, 0x08, 0x1e, 0x21, 0x04, 0xaa, 0x13, 0x10, 0xc5,
- /* -1080, */ 0x08, 0x0a, 0x0f, 0x1c, 0x0e, 0x96, 0x18, 0x0b, 0xb8, 0x1a, 0x05, 0x95, 0x1a, 0x05, 0x75, 0x11,
- /* -1090, */ 0x06, 0x3d, 0x16, 0x06, 0xdc, 0x1e, 0x0e, 0x19, 0x16, 0x05, 0xd1, 0x1d, 0x06, 0x20, 0x23, 0x05,
- /* -10A0, */ 0x27, 0x11, 0x08, 0x7d, 0x11, 0x0d, 0x99, 0x16, 0x04, 0xda, 0x0d, 0x0f, 0x1c, 0x16, 0x07, 0x08,
- /* -10B0, */ 0x17, 0x05, 0xb4, 0x0d, 0x08, 0xc7, 0x13, 0x07, 0xf8, 0x12, 0x08, 0x57, 0x1f, 0x04, 0xfe, 0x19,
- /* -10C0, */ 0x05, 0x4e, 0x13, 0x08, 0x0b, 0x0f, 0x08, 0xe9, 0x17, 0x06, 0xc5, 0x13, 0x06, 0x7b, 0x19, 0x05,
- /* -10D0, */ 0xf1, 0x15, 0x07, 0x44, 0x18, 0x0d, 0xfb, 0x0b, 0x0f, 0x09, 0x1b, 0x0d, 0xbe, 0x12, 0x08, 0x30,
- /* -10E0, */ 0x15, 0x07, 0x59, 0x04, 0x0b, 0xa6, 0x04, 0x0b, 0xae, 0x04, 0x0b, 0x9e, 0x04, 0x0b, 0x96, 0x04,
- /* -10F0, */ 0x0b, 0x9a, 0x0a, 0x0a, 0xb0, 0x0b, 0x0a, 0x90, 0x08, 0x0b, 0x32, 0x0b, 0x09, 0x6b, 0x08, 0x0b,
- /* -1100, */ 0x2a, 0x0b, 0x0a, 0x85, 0x09, 0x0b, 0x12, 0x0a, 0x0a, 0xa6, 0x0d, 0x09, 0xea, 0x13, 0x0d, 0x74,
- /* -1110, */ 0x14, 0x07, 0xd2, 0x13, 0x09, 0x0b, 0x12, 0x08, 0x42, 0x10, 0x09, 0x5b, 0x12, 0x09, 0x1e, 0x0d,
- /* -1120, */ 0x0c, 0xb1, 0x0e, 0x0c, 0x17, 0x11, 0x09, 0x4a, 0x0c, 0x0a, 0x53, 0x0c, 0x0a, 0x47, 0x09, 0x0a,
- /* -1130, */ 0xf7, 0x0e, 0x09, 0xc7, 0x0c, 0x0a, 0x3b, 0x07, 0x06, 0x69, 0x08, 0x06, 0x69, 0x06, 0x09, 0xe3,
- /* -1140, */ 0x08, 0x0b, 0x52, 0x0a, 0x0a, 0xd8, 0x12, 0x06, 0x57, 0x0d, 0x06, 0x57, 0x07, 0x09, 0xe3, 0x04,
- /* -1150, */ 0x0a, 0xe9, 0x10, 0x07, 0x30, 0x09, 0x0b, 0x00, 0x0c, 0x0a, 0x2f, 0x05, 0x0a, 0xe9, 0x05, 0x0a,
- /* -1160, */ 0x6b, 0x06, 0x0a, 0x6b, 0x0a, 0x0a, 0xce, 0x09, 0x0a, 0xee, 0x03, 0x0b, 0xdb, 0x07, 0x0f, 0x7e,
- /* -1170, */ 0x0a, 0x09, 0x97, 0x0a, 0x06, 0x71, 0x0e, 0x09, 0xd5, 0x17, 0x06, 0x93, 0x07, 0x0e, 0x5c, 0x07,
- /* -1180, */ 0x0f, 0xda, 0x0a, 0x0f, 0x35, 0x0d, 0x0d, 0xec, 0x0a, 0x09, 0x97, 0x0a, 0x06, 0x71, 0x08, 0x0b,
- /* -1190, */ 0x22, 0x0f, 0x09, 0x85, 0x06, 0x0b, 0x68, 0x0c, 0x0d, 0x4a, 0x09, 0x0b, 0x09, 0x13, 0x08, 0xf8,
- /* -11A0, */ 0x15, 0x08, 0xa2, 0x04, 0x0b, 0xaa, 0x0f, 0x05, 0x66, 0x0d, 0x07, 0x23, 0x09, 0x0a, 0x06, 0x0b,
- /* -11B0, */ 0x0d, 0x4a, 0x0f, 0x04, 0xee, 0x06, 0x04, 0xf8, 0x04, 0x09, 0x2b, 0x04, 0x08, 0x53, 0x07, 0x08,
- /* -11C0, */ 0xc0, 0x03, 0x11, 0x1f, 0x04, 0x11, 0x1e, 0x07, 0x0d, 0x8c, 0x03, 0x07, 0x34, 0x04, 0x10, 0xdb,
- /* -11D0, */ 0x03, 0x07, 0x36, 0x03, 0x0d, 0xa9, 0x0d, 0x04, 0x20, 0x0b, 0x04, 0x51, 0x0c, 0x04, 0x3a, 0x04,
- /* -11E0, */ 0x0b, 0xb8, 0x04, 0x0c, 0x24, 0x04, 0x05, 0x95, 0x04, 0x04, 0x7c, 0x04, 0x05, 0x75, 0x04, 0x04,
- /* -11F0, */ 0x85, 0x04, 0x09, 0x6b, 0x04, 0x06, 0x3d, 0x06, 0x04, 0x7b, 0x04, 0x06, 0xdc, 0x04, 0x07, 0x83,
- /* -1200, */ 0x04, 0x0e, 0x19, 0x12, 0x04, 0x00, 0x10, 0x08, 0x8e, 0x10, 0x08, 0x69, 0x0e, 0x04, 0x12, 0x0d,
- /* -1210, */ 0x04, 0x2d, 0x03, 0x10, 0xb9, 0x04, 0x05, 0xd1, 0x04, 0x07, 0x6e, 0x04, 0x06, 0x20, 0x07, 0x04,
- /* -1220, */ 0x74, 0x04, 0x0b, 0xfc, 0x0a, 0x04, 0x5c, 0x04, 0x05, 0x27, 0x04, 0x09, 0x3d, 0x04, 0x08, 0x7d,
- /* -1230, */ 0x04, 0x0f, 0xae, 0x04, 0x0d, 0x99, 0x04, 0x06, 0xae, 0x04, 0x04, 0xda, 0x09, 0x04, 0x09, 0x08,
- /* -1240, */ 0x11, 0x22, 0x04, 0x0f, 0x1c, 0x04, 0x07, 0xe6, 0x04, 0x0e, 0xcb, 0x05, 0x08, 0xbd, 0x04, 0x07,
- /* -1250, */ 0x08, 0x04, 0x0f, 0xa3, 0x04, 0x06, 0x57, 0x04, 0x05, 0xb4, 0x04, 0x0f, 0x5d, 0x04, 0x08, 0xc7,
- /* -1260, */ 0x08, 0x0b, 0xf4, 0x04, 0x07, 0xf8, 0x04, 0x07, 0x30, 0x04, 0x07, 0xbe, 0x04, 0x08, 0x57, 0x05,
- /* -1270, */ 0x0d, 0x46, 0x04, 0x04, 0xfe, 0x04, 0x06, 0x0a, 0x04, 0x05, 0x4e, 0x04, 0x0e, 0x3b, 0x04, 0x08,
- /* -1280, */ 0x0b, 0x04, 0x09, 0x30, 0x04, 0x08, 0xe9, 0x05, 0x05, 0xee, 0x04, 0x06, 0xc5, 0x04, 0x06, 0xf2,
- /* -1290, */ 0x04, 0x06, 0x7b, 0x04, 0x09, 0xa1, 0x04, 0x05, 0xf1, 0x04, 0x08, 0x1e, 0x04, 0x07, 0x44, 0x04,
- /* -12A0, */ 0x0b, 0xdd, 0x04, 0x0d, 0xfb, 0x04, 0x04, 0xaa, 0x04, 0x0b, 0xe3, 0x07, 0x0e, 0xee, 0x04, 0x0f,
- /* -12B0, */ 0x09, 0x04, 0x0e, 0xb4, 0x04, 0x0d, 0xbe, 0x04, 0x10, 0xc5, 0x04, 0x08, 0x30, 0x05, 0x0f, 0x30,
- /* -12C0, */ 0x04, 0x07, 0x59, 0x04, 0x0a, 0x0f, 0x06, 0x0e, 0x61, 0x04, 0x04, 0x81, 0x04, 0x0d, 0xab, 0x04,
- /* -12D0, */ 0x0d, 0x93, 0x04, 0x11, 0x6b, 0x04, 0x0e, 0x96, 0x05, 0x04, 0x66, 0x09, 0x04, 0x6b, 0x0b, 0x04,
- /* -12E0, */ 0x46, 0x04, 0x0c, 0xe1
-
-};
-static GHashTable *state_buffer_table=NULL;
-
-static void
-state_buffer_table_cleanup(gpointer key , gpointer value, gpointer user_data _U_){
-
- guint8 *state_buff = value;
- gchar *partial_state_str = key;
-
- if ( state_buff ){
- g_free(state_buff);
- g_free(partial_state_str);
- }
-
-}
-
-void
-sigcomp_init_udvm(void){
-
- gchar *partial_state_str;
- guint i;
- guint8 *sip_sdp_buff;
-
- /* Destroy any existing memory chunks / hashes. */
- if (state_buffer_table){
- g_hash_table_foreach(state_buffer_table, state_buffer_table_cleanup, NULL);
- g_hash_table_destroy(state_buffer_table);
- }
-
-
- state_buffer_table = g_hash_table_new(g_str_hash, g_str_equal);
- /*
- * Store static dictionaries in hash table
- */
- sip_sdp_buff = g_malloc(0x12e4+8);
-
- partial_state_str = bytes_to_str(sip_sdp_state_identifier, 6);
-
- /*
- * Debug g_warning("Sigcomp init: Storing partial state =%s",partial_state_str);
- */
- i = 0;
- while ( i < sip_sdp_state_length ){
- sip_sdp_buff[i+8] = sip_sdp_static_dictionaty_for_sigcomp[i];
- /* Debug
- * g_warning(" Loading 0x%x at address %u",sip_sdp_buff[i] , i);
- */
- i++;
-
- }
-
- g_hash_table_insert(state_buffer_table, g_strdup(partial_state_str), sip_sdp_buff);
- /* Debug
- * g_warning("g_hash_table_insert = 0x%x",sip_sdp_buff);
- * g_warning("g_hash_table_insert = 0x%x",sip_sdp_buff);
- */
-
-}
-
-
-int udvm_state_access(tvbuff_t *tvb, proto_tree *tree,guint8 *buff,guint16 p_id_start, guint16 p_id_length, guint16 state_begin, guint16 *state_length,
- guint16 *state_address, guint16 state_instruction, gboolean state_vars_valid, gint hf_id)
-{
- int result_code = 0;
- guint16 n;
- guint16 k;
- guint16 byte_copy_right;
- guint16 byte_copy_left;
- char partial_state[20]; /* Size is 6 - 20 */
- guint8 *state_buff;
- gchar *partial_state_str;
-
- /*
- * Perform initial checks on validity of data
- * RFC 3320 :
- * 9.4.5. STATE-ACCESS
- * :
- * Decompression failure occurs if partial_identifier_length does not
- * lie between 6 and 20 inclusive. Decompression failure also occurs if
- * no state item matching the partial state identifier can be found, if
- * more than one state item matches the partial identifier, or if
- * partial_identifier_length is less than the minimum_access_length of
- * the matched state item. Otherwise, a state item is returned from the
- * state handler.
- */
-
- if (( p_id_length < 6 ) || ( p_id_length > 20 )){
- result_code = 1;
- return result_code;
- }
-
- n = 0;
- while ( n < p_id_length ){
- partial_state[n] = buff[p_id_start + n];
- n++;
- }
- partial_state_str = bytes_to_str(partial_state, p_id_length);
- proto_tree_add_text(tree,tvb, 0, -1,"### Accessing state ###");
- proto_tree_add_string(tree,hf_id, tvb, 0, 0, partial_state_str);
-
- /* Debug
- * g_warning("State Access: partial state =%s",partial_state_str);
- * g_warning("g_hash_table_lookup = 0x%x",state_buff);
- * g_warning("State Access: partial state =%s",partial_state_str);
- */
- state_buff = g_hash_table_lookup(state_buffer_table, partial_state_str);
- if ( state_buff == NULL ){
- result_code = 2; /* No state match */
- return result_code;
- }
- /*
- * sip_sdp_static_dictionaty
- *
- * 8.4. Byte copying
- * :
- * The string of bytes is copied in ascending order of memory address,
- * respecting the bounds set by byte_copy_left and byte_copy_right.
- * More precisely, if a byte is copied from/to Address m then the next
- * byte is copied from/to Address n where n is calculated as follows:
- *
- * Set k := m + 1 (modulo 2^16)
- * If k = byte_copy_right then set n := byte_copy_left, else set n := k
- *
- */
- /*
- if ( ( state_begin + state_length ) > sip_sdp_state_length )
- return 3;
- */
- /*
- * buff = Where "state" will be stored
- * p_id_start = Partial state identifier start pos in the buffer(buff)
- * p-id_length = Partial state identifier length
- * state_begin = Where to start to read state from
- * state_length = Length of state
- * state_adress = Address where to store the state in the buffer(buff)
- * state_instruction =
- * FALSE = Indicates that state_* is in the stored state
- */
-
- /*
- * The value of
- * state_length MUST be taken from the returned item of state in the
- * case that the state_length operand is set to 0.
- */
- if ( *state_length == 0 ){
- *state_length = state_buff[0] << 8;
- *state_length = *state_length ^ state_buff[1];
- }
- if ( state_vars_valid == FALSE ){
- *state_length = state_buff[0] << 8;
- *state_length = *state_length ^ state_buff[1];
-
- *state_address = state_buff[2] << 8;
- *state_address = *state_address ^ state_buff[3];
-
- state_instruction = state_buff[4] << 8;
- state_instruction = state_instruction ^ state_buff[5];
- }
-
- n = state_begin + 8;
- k = *state_address;
- byte_copy_right = buff[66] << 8;
- byte_copy_right = byte_copy_right ^ buff[67];
- byte_copy_left = buff[64] << 8;
- byte_copy_left = byte_copy_left ^ buff[65];
- /* debug
- *g_warning(" state_begin %u state_address %u",state_begin , *state_address);
- */
- while ( n < (state_begin + *state_length + 8)){
- buff[k] = state_buff[n];
- /* debug
- * g_warning(" Loading 0x%x at address %u",buff[k] , k);
- */
- k = ( k + 1 ) & 0xffff;
- if ( k == byte_copy_right ){
- byte_copy_left = buff[64] << 8;
- byte_copy_left = byte_copy_left ^ buff[65];
- k = byte_copy_left;
- }
- n++;
- }
- /*
- * If a state item is successfully accessed then the state_value byte
- * string is copied into the UDVM memory beginning at state_address.
- *
- * The first 32 bytes of UDVM memory are then initialized to special
- * values as illustrated in Figure 5.
- *
- * 0 7 8 15
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * | UDVM_memory_size | 0 - 1
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * | cycles_per_bit | 2 - 3
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * | SigComp_version | 4 - 5
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * | partial_state_ID_length | 6 - 7
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * | state_length | 8 - 9
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * | |
- * : reserved : 10 - 31
- * | |
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- *
- * Figure 5: Initializing Useful Values in UDVM memory
- *
- * The first five 2-byte words are initialized to contain some values
- * that might be useful to the UDVM bytecode (Useful Values). Note that
- * these values are for information only and can be overwritten when
- * executing the UDVM bytecode without any effect on the endpoint. The
- * MSBs of each 2-byte word are stored preceding the LSBs.
- */
-
- /* state_length */
- buff[8] = state_buff[0];
- buff[9] = state_buff[1];
- /* UDVM_memory_size */
- buff[0] = 0;
- buff[1] = 0;
- /* cycles_per_bit */
- buff[2] = 0;
- buff[3] = 16;
- /* SigComp_version */
- buff[4] = 0;
- buff[5] = 1;
- /* partial_state_ID_length */
- buff[6] = p_id_length >> 8;
- buff[7] = p_id_length & 0xff;
- return 0;
- /*
- * End SIP
- */
-
-}
-
-void udvm_state_create(guint8 *state_buff,guint8 *state_identifier,guint16 p_id_length){
-
- char partial_state[20];
- guint8 i;
- gchar *partial_state_str;
- gchar *dummy_buff;
- /*
- * Debug
- g_warning("Received items of state,state_length_buff[0]= %u, state_length_buff[1]= %u",
- state_length_buff[0],state_length_buff[1]);
-
- */
- i = 0;
- while ( i < p_id_length ){
- partial_state[i] = state_identifier[i];
- i++;
- }
- partial_state_str = bytes_to_str(partial_state, p_id_length);
-
- dummy_buff = g_hash_table_lookup(state_buffer_table, partial_state_str);
- if ( dummy_buff == NULL ){
- g_hash_table_insert(state_buffer_table, g_strdup(partial_state_str), state_buff);
- }else{
- /* The buffer allocated by sigcomp-udvm.c wasen't needed so free it
- */
- g_free(state_buff);
-
- }
-}
-
-void udvm_state_free(guint8 buff[],guint16 p_id_start,guint16 p_id_length){
-
- char partial_state[20];
- guint8 i;
- gchar *partial_state_str;
- /*
- gchar *dummy_buff;
- */
-
- i = 0;
- while ( i < p_id_length ){
- partial_state[i] = buff[p_id_start + i];
- i++;
- }
- partial_state_str = bytes_to_str(partial_state, p_id_length);
- /* TODO Implement a state create counter before actually freeing states
- * Hmm is it a good idea to free the buffer at all?
- g_warning("State-free on %s ",partial_state_str);
- dummy_buff = g_hash_table_lookup(state_buffer_table, partial_state_str);
- if ( dummy_buff == NULL ){
- g_warning("State-free, state not found %s",partial_state_str);
- }else{
- g_hash_table_remove (state_buffer_table, partial_state_str);
- g_free(dummy_buff);
- }
- */
-}
-
+/* sigcomp_state_hdlr.c + * Routines making up the State handler of the Univerasl Decompressor Virtual Machine (UDVM) + * used for Signaling Compression (SigComp) dissection. + * Copyright 2004, Anders Broman <anders.broman@ericsson.com> + * + * $Id: sigcomp_state_hdlr.c 12788 2004-12-20 10:56:25Z jmayer $ + * + * Ethereal - Network traffic analyzer + * By Gerald Combs <gerald@ethereal.com> + * Copyright 1998 Gerald Combs + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * References: + * The Session Initiation Protocol (SIP) and Session Description Protocol + * (SDP) Static Dictionary for Signaling Compression (SigComp) + * http://www.ietf.org/rfc/rfc3485.txt?number=3485 + * + * http://www.ietf.org/rfc/rfc3320.txt?number=3320 + * http://www.ietf.org/rfc/rfc3321.txt?number=3321 + * Useful links : + * http://www.ietf.org/internet-drafts/draft-ietf-rohc-sigcomp-impl-guide-03.txt + * http://www.ietf.org/internet-drafts/draft-ietf-rohc-sigcomp-sip-01.txt + */ + +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <math.h> +#include <glib.h> +#include "strutil.h" + +#ifdef NEED_SNPRINTF_H +# include "snprintf.h" +#endif + +#include "packet.h" +#include "sigcomp_state_hdlr.h" +/* + * Defenitions for: + * The Session Initiation Protocol (SIP) and Session Description Protocol + * (SDP) Static Dictionary for Signaling Compression (SigComp) + * http://www.ietf.org/rfc/rfc3485.txt?number=3485 + */ +guint16 sip_sdp_state_length = 0x12e4; + +static const guint8 sip_sdp_state_identifier[20] = +{ + /* -0000, */ 0xfb, 0xe5, 0x07, 0xdf, 0xe5, 0xe6, 0xaa, 0x5a, 0xf2, 0xab, 0xb9, 0x14, 0xce, 0xaa, 0x05, 0xf9, + /* -0010, */ 0x9c, 0xe6, 0x1b, 0xa5 +}; + +static const guint8 sip_sdp_static_dictionaty_for_sigcomp[0x12e4] = +{ + + /* -0000, */ 0x0d, 0x0a, 0x52, 0x65, 0x6a, 0x65, 0x63, 0x74, 0x2d, 0x43, 0x6f, 0x6e, 0x74, 0x61, 0x63, 0x74, + /* -0010, */ 0x3a, 0x20, 0x0d, 0x0a, 0x45, 0x72, 0x72, 0x6f, 0x72, 0x2d, 0x49, 0x6e, 0x66, 0x6f, 0x3a, 0x20, + /* -0020, */ 0x0d, 0x0a, 0x54, 0x69, 0x6d, 0x65, 0x73, 0x74, 0x61, 0x6d, 0x70, 0x3a, 0x20, 0x0d, 0x0a, 0x43, + /* -0030, */ 0x61, 0x6c, 0x6c, 0x2d, 0x49, 0x6e, 0x66, 0x6f, 0x3a, 0x20, 0x0d, 0x0a, 0x52, 0x65, 0x70, 0x6c, + /* -0040, */ 0x79, 0x2d, 0x54, 0x6f, 0x3a, 0x20, 0x0d, 0x0a, 0x57, 0x61, 0x72, 0x6e, 0x69, 0x6e, 0x67, 0x3a, + /* -0050, */ 0x20, 0x0d, 0x0a, 0x53, 0x75, 0x62, 0x6a, 0x65, 0x63, 0x74, 0x3a, 0x20, 0x3b, 0x68, 0x61, 0x6e, + /* -0060, */ 0x64, 0x6c, 0x69, 0x6e, 0x67, 0x3d, 0x69, 0x6d, 0x61, 0x67, 0x65, 0x3b, 0x70, 0x75, 0x72, 0x70, + /* -0070, */ 0x6f, 0x73, 0x65, 0x3d, 0x3b, 0x63, 0x61, 0x75, 0x73, 0x65, 0x3d, 0x3b, 0x74, 0x65, 0x78, 0x74, + /* -0080, */ 0x3d, 0x63, 0x61, 0x72, 0x64, 0x33, 0x30, 0x30, 0x20, 0x4d, 0x75, 0x6c, 0x74, 0x69, 0x70, 0x6c, + /* -0090, */ 0x65, 0x20, 0x43, 0x68, 0x6f, 0x69, 0x63, 0x65, 0x73, 0x6d, 0x69, 0x6d, 0x65, 0x73, 0x73, 0x61, + /* -00A0, */ 0x67, 0x65, 0x2f, 0x73, 0x69, 0x70, 0x66, 0x72, 0x61, 0x67, 0x34, 0x30, 0x37, 0x20, 0x50, 0x72, + /* -00B0, */ 0x6f, 0x78, 0x79, 0x20, 0x41, 0x75, 0x74, 0x68, 0x65, 0x6e, 0x74, 0x69, 0x63, 0x61, 0x74, 0x69, + /* -00C0, */ 0x6f, 0x6e, 0x20, 0x52, 0x65, 0x71, 0x75, 0x69, 0x72, 0x65, 0x64, 0x69, 0x67, 0x65, 0x73, 0x74, + /* -00D0, */ 0x2d, 0x69, 0x6e, 0x74, 0x65, 0x67, 0x72, 0x69, 0x74, 0x79, 0x34, 0x38, 0x34, 0x20, 0x41, 0x64, + /* -00E0, */ 0x64, 0x72, 0x65, 0x73, 0x73, 0x20, 0x49, 0x6e, 0x63, 0x6f, 0x6d, 0x70, 0x6c, 0x65, 0x74, 0x65, + /* -00F0, */ 0x6c, 0x65, 0x70, 0x68, 0x6f, 0x6e, 0x65, 0x2d, 0x65, 0x76, 0x65, 0x6e, 0x74, 0x73, 0x34, 0x39, + /* -0100, */ 0x34, 0x20, 0x53, 0x65, 0x63, 0x75, 0x72, 0x69, 0x74, 0x79, 0x20, 0x41, 0x67, 0x72, 0x65, 0x65, + /* -0110, */ 0x6d, 0x65, 0x6e, 0x74, 0x20, 0x52, 0x65, 0x71, 0x75, 0x69, 0x72, 0x65, 0x64, 0x65, 0x61, 0x63, + /* -0120, */ 0x74, 0x69, 0x76, 0x61, 0x74, 0x65, 0x64, 0x34, 0x38, 0x31, 0x20, 0x43, 0x61, 0x6c, 0x6c, 0x2f, + /* -0130, */ 0x54, 0x72, 0x61, 0x6e, 0x73, 0x61, 0x63, 0x74, 0x69, 0x6f, 0x6e, 0x20, 0x44, 0x6f, 0x65, 0x73, + /* -0140, */ 0x20, 0x4e, 0x6f, 0x74, 0x20, 0x45, 0x78, 0x69, 0x73, 0x74, 0x61, 0x6c, 0x65, 0x3d, 0x35, 0x30, + /* -0150, */ 0x30, 0x20, 0x53, 0x65, 0x72, 0x76, 0x65, 0x72, 0x20, 0x49, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x61, + /* -0160, */ 0x6c, 0x20, 0x45, 0x72, 0x72, 0x6f, 0x72, 0x6f, 0x62, 0x75, 0x73, 0x74, 0x2d, 0x73, 0x6f, 0x72, + /* -0170, */ 0x74, 0x69, 0x6e, 0x67, 0x3d, 0x34, 0x31, 0x36, 0x20, 0x55, 0x6e, 0x73, 0x75, 0x70, 0x70, 0x6f, + /* -0180, */ 0x72, 0x74, 0x65, 0x64, 0x20, 0x55, 0x52, 0x49, 0x20, 0x53, 0x63, 0x68, 0x65, 0x6d, 0x65, 0x72, + /* -0190, */ 0x67, 0x65, 0x6e, 0x63, 0x79, 0x34, 0x31, 0x35, 0x20, 0x55, 0x6e, 0x73, 0x75, 0x70, 0x70, 0x6f, + /* -01A0, */ 0x72, 0x74, 0x65, 0x64, 0x20, 0x4d, 0x65, 0x64, 0x69, 0x61, 0x20, 0x54, 0x79, 0x70, 0x65, 0x6e, + /* -01B0, */ 0x64, 0x69, 0x6e, 0x67, 0x34, 0x38, 0x38, 0x20, 0x4e, 0x6f, 0x74, 0x20, 0x41, 0x63, 0x63, 0x65, + /* -01C0, */ 0x70, 0x74, 0x61, 0x62, 0x6c, 0x65, 0x20, 0x48, 0x65, 0x72, 0x65, 0x6a, 0x65, 0x63, 0x74, 0x65, + /* -01D0, */ 0x64, 0x34, 0x32, 0x33, 0x20, 0x49, 0x6e, 0x74, 0x65, 0x72, 0x76, 0x61, 0x6c, 0x20, 0x54, 0x6f, + /* -01E0, */ 0x6f, 0x20, 0x42, 0x72, 0x69, 0x65, 0x66, 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0x11, 0x55, 0x06, 0x11, 0x6b, 0x0b, 0x11, 0x60, 0x13, + /* -0DC0, */ 0x10, 0xb2, 0x08, 0x11, 0x71, 0x05, 0x11, 0x87, 0x13, 0x10, 0xf7, 0x09, 0x0e, 0x8d, 0x08, 0x0d, + /* -0DD0, */ 0xae, 0x0c, 0x10, 0xb9, 0x07, 0x10, 0x8e, 0x03, 0x0d, 0x96, 0x03, 0x10, 0x8a, 0x04, 0x10, 0x8a, + /* -0DE0, */ 0x09, 0x0d, 0xd7, 0x0a, 0x0f, 0x12, 0x08, 0x0f, 0x8f, 0x09, 0x0f, 0x8f, 0x08, 0x0d, 0x6c, 0x06, + /* -0DF0, */ 0x0e, 0x66, 0x09, 0x0e, 0x6c, 0x0a, 0x0e, 0x6c, 0x06, 0x0f, 0xc6, 0x07, 0x0f, 0xc6, 0x05, 0x11, + /* -0E00, */ 0x48, 0x06, 0x11, 0x48, 0x06, 0x0f, 0xbf, 0x07, 0x0f, 0xbf, 0x07, 0x0e, 0x55, 0x06, 0x0f, 0x16, + /* -0E10, */ 0x04, 0x0e, 0xf4, 0x03, 0x0e, 0xb1, 0x03, 0x10, 0xa6, 0x09, 0x10, 0x50, 0x03, 0x10, 0xa3, 0x0a, + /* -0E20, */ 0x0d, 0xb4, 0x05, 0x0e, 0x36, 0x06, 0x0e, 0xd6, 0x03, 0x0d, 0xf9, 0x11, 0x0e, 0xf8, 0x04, 0x0c, + /* -0E30, */ 0xd9, 0x08, 0x0e, 0xea, 0x04, 0x09, 0x53, 0x03, 0x0a, 0x4b, 0x04, 0x0e, 0xe4, 0x10, 0x0f, 0x35, + /* -0E40, */ 0x09, 0x0e, 0xe4, 0x08, 0x0d, 0x3f, 0x03, 0x0f, 0xe1, 0x0b, 0x10, 0x01, 0x03, 0x10, 0xac, 0x06, + /* -0E50, */ 0x10, 0x95, 0x0c, 0x0e, 0x76, 0x0b, 0x0f, 0xeb, 0x0a, 0x0f, 0xae, 0x05, 0x10, 0x2b, 0x04, 0x10, + /* -0E60, */ 0x2b, 0x08, 0x10, 0x7a, 0x10, 0x0f, 0x49, 0x07, 0x0f, 0xb8, 0x09, 0x10, 0x3e, 0x0b, 0x10, 0x0c, + /* -0E70, */ 0x07, 0x0f, 0x78, 0x0b, 0x0f, 0x6d, 0x09, 0x10, 0x47, 0x08, 0x10, 0x82, 0x0b, 0x0f, 0xf6, 0x08, + /* -0E80, */ 0x10, 0x62, 0x08, 0x0f, 0x87, 0x08, 0x10, 0x6a, 0x04, 0x0f, 0x78, 0x0d, 0x0f, 0xcd, 0x08, 0x0d, + /* -0E90, */ 0xae, 0x10, 0x0f, 0x5d, 0x0b, 0x0f, 0x98, 0x14, 0x0d, 0x20, 0x1b, 0x0d, 0x20, 0x04, 0x0d, 0xe0, + /* -0EA0, */ 0x14, 0x0e, 0xb4, 0x0b, 0x0f, 0xa3, 0x0b, 0x07, 0x34, 0x0f, 0x0d, 0x56, 0x04, 0x0e, 0xf4, 0x03, + /* -0EB0, */ 0x10, 0xaf, 0x07, 0x0d, 0x34, 0x09, 0x0f, 0x27, 0x04, 0x10, 0x9b, 0x04, 0x10, 0x9f, 0x09, 0x10, + /* -0EC0, */ 0x59, 0x08, 0x10, 0x72, 0x09, 0x10, 0x35, 0x0a, 0x10, 0x21, 0x0a, 0x10, 0x17, 0x08, 0x0f, 0xe3, + /* -0ED0, */ 0x03, 0x10, 0xa9, 0x05, 0x0c, 0xac, 0x04, 0x0c, 0xbd, 0x07, 0x0c, 0xc1, 0x08, 0x0c, 0xc1, 0x09, + /* -0EE0, */ 0x0c, 0xf6, 0x10, 0x0c, 0x72, 0x0c, 0x0c, 0x86, 0x04, 0x0d, 0x64, 0x0c, 0x0c, 0xd5, 0x09, 0x0c, + /* -0EF0, */ 0xff, 0x1b, 0x0b, 0xfc, 0x11, 0x0c, 0x5d, 0x13, 0x0c, 0x30, 0x09, 0x0c, 0xa4, 0x0c, 0x0c, 0x24, + /* -0F00, */ 0x0c, 0x0d, 0x3b, 0x03, 0x0d, 0x1a, 0x03, 0x0d, 0x1d, 0x16, 0x0c, 0x43, 0x09, 0x0c, 0x92, 0x09, + /* -0F10, */ 0x0c, 0x9b, 0x0d, 0x0e, 0xcb, 0x04, 0x0d, 0x16, 0x06, 0x0d, 0x10, 0x05, 0x04, 0xf2, 0x0b, 0x0c, + /* -0F20, */ 0xe1, 0x05, 0x0b, 0xde, 0x0a, 0x0c, 0xec, 0x13, 0x0b, 0xe3, 0x07, 0x0b, 0xd4, 0x08, 0x0d, 0x08, + /* -0F30, */ 0x0c, 0x0c, 0xc9, 0x09, 0x0c, 0x3a, 0x04, 0x0a, 0xe5, 0x0c, 0x0a, 0x23, 0x08, 0x0b, 0x3a, 0x0e, + /* -0F40, */ 0x09, 0xab, 0x0f, 0x0e, 0xfa, 0x09, 0x0f, 0x6f, 0x0c, 0x0a, 0x17, 0x0f, 0x09, 0x76, 0x0c, 0x0a, + /* -0F50, */ 0x5f, 0x17, 0x0d, 0xe2, 0x0f, 0x07, 0xa8, 0x0a, 0x0f, 0x85, 0x0f, 0x08, 0xd6, 0x0e, 0x09, 0xb9, + /* -0F60, */ 0x0b, 0x0a, 0x7a, 0x03, 0x0b, 0xdb, 0x03, 0x08, 0xc1, 0x04, 0x0e, 0xc7, 0x03, 0x08, 0xd3, 0x02, + /* -0F70, */ 0x04, 0x8d, 0x08, 0x0b, 0x4a, 0x05, 0x0b, 0x8c, 0x07, 0x0b, 0x61, 0x06, 0x05, 0x48, 0x04, 0x07, + /* -0F80, */ 0xf4, 0x05, 0x10, 0x30, 0x04, 0x07, 0x1e, 0x08, 0x07, 0x1e, 0x05, 0x0b, 0x91, 0x10, 0x04, 0xca, + /* -0F90, */ 0x09, 0x0a, 0x71, 0x09, 0x0e, 0x87, 0x05, 0x04, 0x98, 0x05, 0x0b, 0x6e, 0x0b, 0x04, 0x9b, 0x0f, + /* -0FA0, */ 0x04, 0x9b, 0x07, 0x04, 0x9b, 0x03, 0x04, 0xa3, 0x07, 0x04, 0xa3, 0x10, 0x07, 0x98, 0x09, 0x07, + /* -0FB0, */ 0x98, 0x05, 0x0b, 0x73, 0x05, 0x0b, 0x78, 0x05, 0x0b, 0x7d, 0x05, 0x07, 0xb9, 0x05, 0x0b, 0x82, + /* -0FC0, */ 0x05, 0x0b, 0x87, 0x05, 0x0b, 0x1d, 0x05, 0x08, 0xe4, 0x05, 0x0c, 0x81, 0x05, 0x0f, 0x44, 0x05, + /* -0FD0, */ 0x11, 0x40, 0x05, 0x08, 0x78, 0x05, 0x08, 0x9d, 0x05, 0x0f, 0x58, 0x05, 0x07, 0x3f, 0x05, 0x0c, + /* -0FE0, */ 0x6d, 0x05, 0x10, 0xf2, 0x05, 0x0c, 0x58, 0x05, 0x06, 0xa9, 0x04, 0x07, 0xb6, 0x09, 0x05, 0x8c, + /* -0FF0, */ 0x06, 0x06, 0x1a, 0x06, 0x0e, 0x81, 0x0a, 0x06, 0x16, 0x0a, 0x0a, 0xc4, 0x07, 0x0b, 0x5a, 0x0a, + /* -1000, */ 0x0a, 0xba, 0x03, 0x0b, 0x1b, 0x04, 0x11, 0x45, 0x06, 0x0c, 0x8c, 0x07, 0x05, 0xad, 0x0a, 0x0e, + /* -1010, */ 0xda, 0x08, 0x0b, 0x42, 0x0d, 0x09, 0xf7, 0x0b, 0x05, 0x1c, 0x09, 0x11, 0x16, 0x08, 0x05, 0xc9, + /* -1020, */ 0x07, 0x0d, 0x86, 0x06, 0x0b, 0xcf, 0x0a, 0x06, 0x4d, 0x04, 0x0b, 0xa2, 0x06, 0x06, 0x8d, 0x08, + /* -1030, */ 0x05, 0xe6, 0x08, 0x0e, 0x11, 0x0b, 0x0a, 0x9b, 0x03, 0x0a, 0x04, 0x03, 0x0b, 0xb5, 0x05, 0x10, + /* -1040, */ 0xd7, 0x04, 0x09, 0x94, 0x05, 0x0a, 0xe2, 0x03, 0x0b, 0xb2, 0x06, 0x0d, 0x67, 0x04, 0x0d, 0x11, + /* -1050, */ 0x08, 0x08, 0xb7, 0x1b, 0x0e, 0x3b, 0x0a, 0x09, 0xa1, 0x14, 0x04, 0x85, 0x15, 0x07, 0x83, 0x15, + /* -1060, */ 0x07, 0x6e, 0x0d, 0x09, 0x3d, 0x17, 0x06, 0xae, 0x0f, 0x07, 0xe6, 0x14, 0x07, 0xbe, 0x0d, 0x06, + /* -1070, */ 0x0a, 0x0d, 0x09, 0x30, 0x16, 0x06, 0xf2, 0x12, 0x08, 0x1e, 0x21, 0x04, 0xaa, 0x13, 0x10, 0xc5, + /* -1080, */ 0x08, 0x0a, 0x0f, 0x1c, 0x0e, 0x96, 0x18, 0x0b, 0xb8, 0x1a, 0x05, 0x95, 0x1a, 0x05, 0x75, 0x11, + /* -1090, */ 0x06, 0x3d, 0x16, 0x06, 0xdc, 0x1e, 0x0e, 0x19, 0x16, 0x05, 0xd1, 0x1d, 0x06, 0x20, 0x23, 0x05, + /* -10A0, */ 0x27, 0x11, 0x08, 0x7d, 0x11, 0x0d, 0x99, 0x16, 0x04, 0xda, 0x0d, 0x0f, 0x1c, 0x16, 0x07, 0x08, + /* -10B0, */ 0x17, 0x05, 0xb4, 0x0d, 0x08, 0xc7, 0x13, 0x07, 0xf8, 0x12, 0x08, 0x57, 0x1f, 0x04, 0xfe, 0x19, + /* -10C0, */ 0x05, 0x4e, 0x13, 0x08, 0x0b, 0x0f, 0x08, 0xe9, 0x17, 0x06, 0xc5, 0x13, 0x06, 0x7b, 0x19, 0x05, + /* -10D0, */ 0xf1, 0x15, 0x07, 0x44, 0x18, 0x0d, 0xfb, 0x0b, 0x0f, 0x09, 0x1b, 0x0d, 0xbe, 0x12, 0x08, 0x30, + /* -10E0, */ 0x15, 0x07, 0x59, 0x04, 0x0b, 0xa6, 0x04, 0x0b, 0xae, 0x04, 0x0b, 0x9e, 0x04, 0x0b, 0x96, 0x04, + /* -10F0, */ 0x0b, 0x9a, 0x0a, 0x0a, 0xb0, 0x0b, 0x0a, 0x90, 0x08, 0x0b, 0x32, 0x0b, 0x09, 0x6b, 0x08, 0x0b, + /* -1100, */ 0x2a, 0x0b, 0x0a, 0x85, 0x09, 0x0b, 0x12, 0x0a, 0x0a, 0xa6, 0x0d, 0x09, 0xea, 0x13, 0x0d, 0x74, + /* -1110, */ 0x14, 0x07, 0xd2, 0x13, 0x09, 0x0b, 0x12, 0x08, 0x42, 0x10, 0x09, 0x5b, 0x12, 0x09, 0x1e, 0x0d, + /* -1120, */ 0x0c, 0xb1, 0x0e, 0x0c, 0x17, 0x11, 0x09, 0x4a, 0x0c, 0x0a, 0x53, 0x0c, 0x0a, 0x47, 0x09, 0x0a, + /* -1130, */ 0xf7, 0x0e, 0x09, 0xc7, 0x0c, 0x0a, 0x3b, 0x07, 0x06, 0x69, 0x08, 0x06, 0x69, 0x06, 0x09, 0xe3, + /* -1140, */ 0x08, 0x0b, 0x52, 0x0a, 0x0a, 0xd8, 0x12, 0x06, 0x57, 0x0d, 0x06, 0x57, 0x07, 0x09, 0xe3, 0x04, + /* -1150, */ 0x0a, 0xe9, 0x10, 0x07, 0x30, 0x09, 0x0b, 0x00, 0x0c, 0x0a, 0x2f, 0x05, 0x0a, 0xe9, 0x05, 0x0a, + /* -1160, */ 0x6b, 0x06, 0x0a, 0x6b, 0x0a, 0x0a, 0xce, 0x09, 0x0a, 0xee, 0x03, 0x0b, 0xdb, 0x07, 0x0f, 0x7e, + /* -1170, */ 0x0a, 0x09, 0x97, 0x0a, 0x06, 0x71, 0x0e, 0x09, 0xd5, 0x17, 0x06, 0x93, 0x07, 0x0e, 0x5c, 0x07, + /* -1180, */ 0x0f, 0xda, 0x0a, 0x0f, 0x35, 0x0d, 0x0d, 0xec, 0x0a, 0x09, 0x97, 0x0a, 0x06, 0x71, 0x08, 0x0b, + /* -1190, */ 0x22, 0x0f, 0x09, 0x85, 0x06, 0x0b, 0x68, 0x0c, 0x0d, 0x4a, 0x09, 0x0b, 0x09, 0x13, 0x08, 0xf8, + /* -11A0, */ 0x15, 0x08, 0xa2, 0x04, 0x0b, 0xaa, 0x0f, 0x05, 0x66, 0x0d, 0x07, 0x23, 0x09, 0x0a, 0x06, 0x0b, + /* -11B0, */ 0x0d, 0x4a, 0x0f, 0x04, 0xee, 0x06, 0x04, 0xf8, 0x04, 0x09, 0x2b, 0x04, 0x08, 0x53, 0x07, 0x08, + /* -11C0, */ 0xc0, 0x03, 0x11, 0x1f, 0x04, 0x11, 0x1e, 0x07, 0x0d, 0x8c, 0x03, 0x07, 0x34, 0x04, 0x10, 0xdb, + /* -11D0, */ 0x03, 0x07, 0x36, 0x03, 0x0d, 0xa9, 0x0d, 0x04, 0x20, 0x0b, 0x04, 0x51, 0x0c, 0x04, 0x3a, 0x04, + /* -11E0, */ 0x0b, 0xb8, 0x04, 0x0c, 0x24, 0x04, 0x05, 0x95, 0x04, 0x04, 0x7c, 0x04, 0x05, 0x75, 0x04, 0x04, + /* -11F0, */ 0x85, 0x04, 0x09, 0x6b, 0x04, 0x06, 0x3d, 0x06, 0x04, 0x7b, 0x04, 0x06, 0xdc, 0x04, 0x07, 0x83, + /* -1200, */ 0x04, 0x0e, 0x19, 0x12, 0x04, 0x00, 0x10, 0x08, 0x8e, 0x10, 0x08, 0x69, 0x0e, 0x04, 0x12, 0x0d, + /* -1210, */ 0x04, 0x2d, 0x03, 0x10, 0xb9, 0x04, 0x05, 0xd1, 0x04, 0x07, 0x6e, 0x04, 0x06, 0x20, 0x07, 0x04, + /* -1220, */ 0x74, 0x04, 0x0b, 0xfc, 0x0a, 0x04, 0x5c, 0x04, 0x05, 0x27, 0x04, 0x09, 0x3d, 0x04, 0x08, 0x7d, + /* -1230, */ 0x04, 0x0f, 0xae, 0x04, 0x0d, 0x99, 0x04, 0x06, 0xae, 0x04, 0x04, 0xda, 0x09, 0x04, 0x09, 0x08, + /* -1240, */ 0x11, 0x22, 0x04, 0x0f, 0x1c, 0x04, 0x07, 0xe6, 0x04, 0x0e, 0xcb, 0x05, 0x08, 0xbd, 0x04, 0x07, + /* -1250, */ 0x08, 0x04, 0x0f, 0xa3, 0x04, 0x06, 0x57, 0x04, 0x05, 0xb4, 0x04, 0x0f, 0x5d, 0x04, 0x08, 0xc7, + /* -1260, */ 0x08, 0x0b, 0xf4, 0x04, 0x07, 0xf8, 0x04, 0x07, 0x30, 0x04, 0x07, 0xbe, 0x04, 0x08, 0x57, 0x05, + /* -1270, */ 0x0d, 0x46, 0x04, 0x04, 0xfe, 0x04, 0x06, 0x0a, 0x04, 0x05, 0x4e, 0x04, 0x0e, 0x3b, 0x04, 0x08, + /* -1280, */ 0x0b, 0x04, 0x09, 0x30, 0x04, 0x08, 0xe9, 0x05, 0x05, 0xee, 0x04, 0x06, 0xc5, 0x04, 0x06, 0xf2, + /* -1290, */ 0x04, 0x06, 0x7b, 0x04, 0x09, 0xa1, 0x04, 0x05, 0xf1, 0x04, 0x08, 0x1e, 0x04, 0x07, 0x44, 0x04, + /* -12A0, */ 0x0b, 0xdd, 0x04, 0x0d, 0xfb, 0x04, 0x04, 0xaa, 0x04, 0x0b, 0xe3, 0x07, 0x0e, 0xee, 0x04, 0x0f, + /* -12B0, */ 0x09, 0x04, 0x0e, 0xb4, 0x04, 0x0d, 0xbe, 0x04, 0x10, 0xc5, 0x04, 0x08, 0x30, 0x05, 0x0f, 0x30, + /* -12C0, */ 0x04, 0x07, 0x59, 0x04, 0x0a, 0x0f, 0x06, 0x0e, 0x61, 0x04, 0x04, 0x81, 0x04, 0x0d, 0xab, 0x04, + /* -12D0, */ 0x0d, 0x93, 0x04, 0x11, 0x6b, 0x04, 0x0e, 0x96, 0x05, 0x04, 0x66, 0x09, 0x04, 0x6b, 0x0b, 0x04, + /* -12E0, */ 0x46, 0x04, 0x0c, 0xe1 + +}; +static GHashTable *state_buffer_table=NULL; + +static void +state_buffer_table_cleanup(gpointer key , gpointer value, gpointer user_data _U_){ + + guint8 *state_buff = value; + gchar *partial_state_str = key; + + if ( state_buff ){ + g_free(state_buff); + g_free(partial_state_str); + } + +} + +void +sigcomp_init_udvm(void){ + + gchar *partial_state_str; + guint i; + guint8 *sip_sdp_buff; + + /* Destroy any existing memory chunks / hashes. */ + if (state_buffer_table){ + g_hash_table_foreach(state_buffer_table, state_buffer_table_cleanup, NULL); + g_hash_table_destroy(state_buffer_table); + } + + + state_buffer_table = g_hash_table_new(g_str_hash, g_str_equal); + /* + * Store static dictionaries in hash table + */ + sip_sdp_buff = g_malloc(0x12e4+8); + + partial_state_str = bytes_to_str(sip_sdp_state_identifier, 6); + + /* + * Debug g_warning("Sigcomp init: Storing partial state =%s",partial_state_str); + */ + i = 0; + while ( i < sip_sdp_state_length ){ + sip_sdp_buff[i+8] = sip_sdp_static_dictionaty_for_sigcomp[i]; + /* Debug + * g_warning(" Loading 0x%x at address %u",sip_sdp_buff[i] , i); + */ + i++; + + } + + g_hash_table_insert(state_buffer_table, g_strdup(partial_state_str), sip_sdp_buff); + /* Debug + * g_warning("g_hash_table_insert = 0x%x",sip_sdp_buff); + * g_warning("g_hash_table_insert = 0x%x",sip_sdp_buff); + */ + +} + + +int udvm_state_access(tvbuff_t *tvb, proto_tree *tree,guint8 *buff,guint16 p_id_start, guint16 p_id_length, guint16 state_begin, guint16 *state_length, + guint16 *state_address, guint16 *state_instruction, + gint hf_id) +{ + int result_code = 0; + guint16 n; + guint16 k; + guint16 byte_copy_right; + guint16 byte_copy_left; + char partial_state[20]; /* Size is 6 - 20 */ + guint8 *state_buff; + gchar *partial_state_str; + + /* + * Perform initial checks on validity of data + * RFC 3320 : + * 9.4.5. STATE-ACCESS + * : + * Decompression failure occurs if partial_identifier_length does not + * lie between 6 and 20 inclusive. Decompression failure also occurs if + * no state item matching the partial state identifier can be found, if + * more than one state item matches the partial identifier, or if + * partial_identifier_length is less than the minimum_access_length of + * the matched state item. Otherwise, a state item is returned from the + * state handler. + */ + + if (( p_id_length < 6 ) || ( p_id_length > 20 )){ + result_code = 1; + return result_code; + } + + n = 0; + while ( n < p_id_length ){ + partial_state[n] = buff[p_id_start + n]; + n++; + } + partial_state_str = bytes_to_str(partial_state, p_id_length); + proto_tree_add_text(tree,tvb, 0, -1,"### Accessing state ###"); + proto_tree_add_string(tree,hf_id, tvb, 0, 0, partial_state_str); + + /* Debug + * g_warning("State Access: partial state =%s",partial_state_str); + * g_warning("g_hash_table_lookup = 0x%x",state_buff); + * g_warning("State Access: partial state =%s",partial_state_str); + */ + state_buff = g_hash_table_lookup(state_buffer_table, partial_state_str); + if ( state_buff == NULL ){ + result_code = 2; /* No state match */ + return result_code; + } + /* + * sip_sdp_static_dictionaty + * + * 8.4. Byte copying + * : + * The string of bytes is copied in ascending order of memory address, + * respecting the bounds set by byte_copy_left and byte_copy_right. + * More precisely, if a byte is copied from/to Address m then the next + * byte is copied from/to Address n where n is calculated as follows: + * + * Set k := m + 1 (modulo 2^16) + * If k = byte_copy_right then set n := byte_copy_left, else set n := k + * + */ + /* + if ( ( state_begin + state_length ) > sip_sdp_state_length ) + return 3; + */ + /* + * buff = Where "state" will be stored + * p_id_start = Partial state identifier start pos in the buffer(buff) + * p-id_length = Partial state identifier length + * state_begin = Where to start to read state from + * state_length = Length of state + * state_adress = Address where to store the state in the buffer(buff) + * state_instruction = + * FALSE = Indicates that state_* is in the stored state + */ + + /* + * The value of + * state_length MUST be taken from the returned item of state in the + * case that the state_length operand is set to 0. + * + * The same is true of state_address, state_instruction. + */ + if ( *state_length == 0 ){ + *state_length = state_buff[0] << 8; + *state_length = *state_length | state_buff[1]; + } + if ( *state_address == 0 ){ + *state_address = state_buff[2] << 8; + *state_address = *state_address | state_buff[3]; + } + if ( *state_instruction == 0 ){ + *state_instruction = state_buff[4] << 8; + *state_instruction = *state_instruction | state_buff[5]; + } + + n = state_begin + 8; + k = *state_address; + + /* + * NOTE: Strictly speaking, byte_copy_left and byte_copy_right should + * not be used if this has been called for bytecode referenced in + * the message header. However, since the memory is initialised + * to zero, the code works OK. + */ + byte_copy_right = buff[66] << 8; + byte_copy_right = byte_copy_right | buff[67]; + byte_copy_left = buff[64] << 8; + byte_copy_left = byte_copy_left | buff[65]; + /* debug + *g_warning(" state_begin %u state_address %u",state_begin , *state_address); + */ + while ( n < (state_begin + *state_length + 8)){ + buff[k] = state_buff[n]; + /* debug + * g_warning(" Loading 0x%x at address %u",buff[k] , k); + */ + k = ( k + 1 ) & 0xffff; + if ( k == byte_copy_right ){ + k = byte_copy_left; + } + n++; + } + return 0; + /* + * End SIP + */ + +} + +void udvm_state_create(guint8 *state_buff,guint8 *state_identifier,guint16 p_id_length){ + + char partial_state[20]; + guint8 i; + gchar *partial_state_str; + gchar *dummy_buff; + /* + * Debug + g_warning("Received items of state,state_length_buff[0]= %u, state_length_buff[1]= %u", + state_length_buff[0],state_length_buff[1]); + + */ + i = 0; + while ( i < p_id_length ){ + partial_state[i] = state_identifier[i]; + i++; + } + partial_state_str = bytes_to_str(partial_state, p_id_length); + + dummy_buff = g_hash_table_lookup(state_buffer_table, partial_state_str); + if ( dummy_buff == NULL ){ + g_hash_table_insert(state_buffer_table, g_strdup(partial_state_str), state_buff); + }else{ + /* The buffer allocated by sigcomp-udvm.c wasen't needed so free it + */ + g_free(state_buff); + + } +} + +void udvm_state_free(guint8 buff[],guint16 p_id_start,guint16 p_id_length){ + + char partial_state[20]; + guint8 i; + gchar *partial_state_str; + /* + gchar *dummy_buff; + */ + + i = 0; + while ( i < p_id_length ){ + partial_state[i] = buff[p_id_start + i]; + i++; + } + partial_state_str = bytes_to_str(partial_state, p_id_length); + /* TODO Implement a state create counter before actually freeing states + * Hmm is it a good idea to free the buffer at all? + g_warning("State-free on %s ",partial_state_str); + dummy_buff = g_hash_table_lookup(state_buffer_table, partial_state_str); + if ( dummy_buff == NULL ){ + g_warning("State-free, state not found %s",partial_state_str); + }else{ + g_hash_table_remove (state_buffer_table, partial_state_str); + g_free(dummy_buff); + } + */ +} + diff --git a/epan/sigcomp_state_hdlr.h b/epan/sigcomp_state_hdlr.h index f33e9a1483..29bf893145 100644 --- a/epan/sigcomp_state_hdlr.h +++ b/epan/sigcomp_state_hdlr.h @@ -1,45 +1,45 @@ -/* sigcomp_state_hdlr.c
- * Routines making up the State handler of the Univerasl Decompressor Virtual Machine (UDVM)
- * used for Signaling Compression (SigComp) dissection.
- * Copyright 2004, Anders Broman <anders.broman@ericsson.com>
- *
- * $Id: udvm.c 11445 2004-07-20 19:04:48Z etxrab $
- *
- * Ethereal - Network traffic analyzer
- * By Gerald Combs <gerald@ethereal.com>
- * Copyright 1998 Gerald Combs
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- * References:
- * http://www.ietf.org/rfc/rfc3320.txt?number=3320
- * http://www.ietf.org/rfc/rfc3321.txt?number=3321
- * Useful links :
- * http://www.ietf.org/internet-drafts/draft-ietf-rohc-sigcomp-impl-guide-03.txt
- * http://www.ietf.org/internet-drafts/draft-ietf-rohc-sigcomp-sip-01.txt
- */
-
-#ifndef SIGCOMP_STATE_HDLR_H
-#define SIGCOMP_STATE_HDLR_H
-
-extern const value_string result_code_vals[];
-extern int udvm_state_access(tvbuff_t *tvb, proto_tree *tree,guint8 *buff,guint16 p_id_start, guint16 p_id_length, guint16 state_begin, guint16 *state_length,
- guint16 *state_address, guint16 state_instruction, gboolean state_vars_valid, gint hf_id);
-
-extern void udvm_state_create(guint8 *state_buff,guint8 *state_identifier_buff,guint16 p_id_length);
-extern void udvm_state_free(guint8 buff[],guint16 p_id_start,guint16 p_id_length);
-
-extern void sigcomp_init_udvm(void);
-#endif
-/* SIGCOMP_STATE_HDLR_H */
+/* sigcomp_state_hdlr.c + * Routines making up the State handler of the Univerasl Decompressor Virtual Machine (UDVM) + * used for Signaling Compression (SigComp) dissection. + * Copyright 2004, Anders Broman <anders.broman@ericsson.com> + * + * $Id: udvm.c 11445 2004-07-20 19:04:48Z etxrab $ + * + * Ethereal - Network traffic analyzer + * By Gerald Combs <gerald@ethereal.com> + * Copyright 1998 Gerald Combs + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * References: + * http://www.ietf.org/rfc/rfc3320.txt?number=3320 + * http://www.ietf.org/rfc/rfc3321.txt?number=3321 + * Useful links : + * http://www.ietf.org/internet-drafts/draft-ietf-rohc-sigcomp-impl-guide-03.txt + * http://www.ietf.org/internet-drafts/draft-ietf-rohc-sigcomp-sip-01.txt + */ + +#ifndef SIGCOMP_STATE_HDLR_H +#define SIGCOMP_STATE_HDLR_H + +extern const value_string result_code_vals[]; +extern int udvm_state_access(tvbuff_t *tvb, proto_tree *tree,guint8 *buff,guint16 p_id_start, guint16 p_id_length, guint16 state_begin, guint16 *state_length, + guint16 *state_address, guint16 *state_instruction, gint hf_id); + +extern void udvm_state_create(guint8 *state_buff,guint8 *state_identifier_buff,guint16 p_id_length); +extern void udvm_state_free(guint8 buff[],guint16 p_id_start,guint16 p_id_length); + +extern void sigcomp_init_udvm(void); +#endif +/* SIGCOMP_STATE_HDLR_H */ |