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-rw-r--r--packet-esis.c228
1 files changed, 109 insertions, 119 deletions
diff --git a/packet-esis.c b/packet-esis.c
index b38450313c..f6d47733ad 100644
--- a/packet-esis.c
+++ b/packet-esis.c
@@ -2,7 +2,7 @@
* Routines for ISO/OSI End System to Intermediate System
* Routeing Exchange Protocol ISO 9542.
*
- * $Id: packet-esis.c,v 1.7 2000/08/13 14:08:09 deniel Exp $
+ * $Id: packet-esis.c,v 1.8 2000/11/18 10:38:24 guy Exp $
* Ralf Schneider <Ralf.Schneider@t-online.de>
*
* Ethereal - Network traffic analyzer
@@ -67,12 +67,12 @@ static const value_string esis_vals[] = {
/* internal prototypes */
-void esis_dissect_esh_pdu( u_char len, const u_char *pd, int offset,
- frame_data *fd, proto_tree *treepd);
-void esis_dissect_ish_pdu( u_char len, const u_char *pd, int offset,
- frame_data *fd, proto_tree *tree);
-void esis_dissect_redirect_pdu( u_char len, const u_char *pd, int offset,
- frame_data *fd, proto_tree *tree);
+static void esis_dissect_esh_pdu( u_char len, tvbuff_t *tvb,
+ packet_info *pinfo, proto_tree *treepd);
+static void esis_dissect_ish_pdu( u_char len, tvbuff_t *tvb,
+ packet_info *pinfo, proto_tree *tree);
+static void esis_dissect_redirect_pdu( u_char len, tvbuff_t *tvb,
+ packet_info *pinfo, proto_tree *tree);
/* ################## Descriptions ###########################################*/
/* Parameters for the ESH PDU
@@ -146,35 +146,22 @@ void esis_dissect_redirect_pdu( u_char len, const u_char *pd, int offset,
* Output:
* void (may modify proto tree)
*/
-void
-esis_dissect_unknown(int offset,guint length,proto_tree *tree,frame_data *fd,
- char *fmat, ...){
+static void
+esis_dissect_unknown( tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
+ char *fmat, ...){
va_list ap;
- if ( !IS_DATA_IN_FRAME(offset) ) {
- /*
- * big oops They were off the end of the packet already.
- * Just ignore this one.
- */
- return;
- }
- if ( !BYTES_ARE_IN_FRAME(offset, length) ) {
- /*
- * length will take us past eop. Truncate length.
- */
- length = END_OF_FRAME;
- }
-
va_start(ap, fmat);
- proto_tree_add_text_valist(tree, NullTVB, offset, length, fmat, ap);
+ proto_tree_add_text_valist(tree, tvb, 0, tvb_length(tvb), fmat, ap);
va_end(ap);
}
-void
-esis_dissect_esh_pdu( u_char len, const u_char *pd, int offset,
- frame_data *fd, proto_tree *tree) {
+static void
+esis_dissect_esh_pdu( u_char len, tvbuff_t *tvb, packet_info *pinfo,
+ proto_tree *tree) {
proto_tree *esis_area_tree;
+ int offset = 0;
int no_sa = 0;
int sal = 0;
@@ -183,91 +170,100 @@ esis_dissect_esh_pdu( u_char len, const u_char *pd, int offset,
if (tree) {
offset += ESIS_HDR_FIXED_LENGTH;
- no_sa = pd[offset];
+ no_sa = tvb_get_guint8(tvb, offset);
len -= 1;
- ti = proto_tree_add_text( tree, NullTVB, offset++, END_OF_FRAME,
+ ti = proto_tree_add_text( tree, tvb, offset, tvb_length_remaining(tvb, offset),
"Number of Source Addresses (SA, Format: NSAP) : %u", no_sa );
+ offset++;
esis_area_tree = proto_item_add_subtree( ti, ett_esis_area_addr );
while ( no_sa-- > 0 ) {
- sal = (int) pd[offset++];
- proto_tree_add_text(esis_area_tree, NullTVB, offset, 1, "SAL: %2u Octets", sal);
- proto_tree_add_text(esis_area_tree, NullTVB, offset + 1, sal,
- " SA: %s", print_nsap_net( &pd[offset], sal ) );
+ sal = (int) tvb_get_guint8(tvb, offset);
+ offset++;
+ proto_tree_add_text(esis_area_tree, tvb, offset, 1, "SAL: %2u Octets", sal);
+ proto_tree_add_text(esis_area_tree, tvb, offset + 1, sal,
+ " SA: %s",
+ print_nsap_net( tvb_get_ptr(tvb, offset, sal), sal ) );
offset += sal;
len -= ( sal + 1 );
}
- dissect_osi_options( PDU_TYPE_ESIS_ESH, len, pd, offset, fd, tree );
+ dissect_osi_options( PDU_TYPE_ESIS_ESH, len, tvb, offset, pinfo, tree );
}
} /* esis_dissect_esh_pdu */ ;
-void
-esis_dissect_ish_pdu( u_char len, const u_char *pd, int offset,
- frame_data *fd, proto_tree *tree) {
+static void
+esis_dissect_ish_pdu( u_char len, tvbuff_t *tvb, packet_info *pinfo,
+ proto_tree *tree) {
+ int offset = 0;
int netl = 0;
if (tree) {
offset += ESIS_HDR_FIXED_LENGTH;
- netl = (int) pd[ offset ];
- proto_tree_add_text( tree, NullTVB, offset, netl + 1,
+ netl = (int) tvb_get_guint8(tvb, offset);
+ proto_tree_add_text( tree, tvb, offset, netl + 1,
"### Network Entity Titel Section ###");
- proto_tree_add_text( tree, NullTVB, offset++, 1, "NETL: %2u Octets", netl);
- proto_tree_add_text( tree, NullTVB, offset, netl,
- " NET: %s", print_nsap_net( &pd[offset], netl ) );
+ proto_tree_add_text( tree, tvb, offset++, 1, "NETL: %2u Octets", netl);
+ proto_tree_add_text( tree, tvb, offset, netl,
+ " NET: %s",
+ print_nsap_net( tvb_get_ptr(tvb, offset, netl), netl ) );
offset += netl;
len -= ( netl + 1 );
- dissect_osi_options( PDU_TYPE_ESIS_ISH, len, pd, offset, fd, tree );
+ dissect_osi_options( PDU_TYPE_ESIS_ISH, len, tvb, offset, pinfo, tree );
}
};
-void
-esis_dissect_redirect_pdu( u_char len, const u_char *pd, int offset,
- frame_data *fd, proto_tree *tree) {
+static void
+esis_dissect_redirect_pdu( u_char len, tvbuff_t *tvb, packet_info *pinfo,
+ proto_tree *tree) {
+ int offset = 0;
int tmpl = 0;
if (tree) {
offset += ESIS_HDR_FIXED_LENGTH;
- tmpl = (int) pd[ offset ];
- proto_tree_add_text( tree, NullTVB, offset, tmpl + 1,
+ tmpl = (int) tvb_get_guint8(tvb, offset);
+ proto_tree_add_text( tree, tvb, offset, tmpl + 1,
"### Destination Address Section ###" );
- proto_tree_add_text( tree, NullTVB, offset++, 1, "DAL: %2u Octets", tmpl);
- proto_tree_add_text( tree, NullTVB, offset, tmpl,
- " DA : %s", print_nsap_net( &pd[offset], tmpl ) );
+ proto_tree_add_text( tree, tvb, offset++, 1, "DAL: %2u Octets", tmpl);
+ proto_tree_add_text( tree, tvb, offset, tmpl,
+ " DA : %s",
+ print_nsap_net( tvb_get_ptr(tvb, offset, tmpl), tmpl ) );
offset += tmpl;
len -= ( tmpl + 1 );
- tmpl = (int) pd[ offset ];
+ tmpl = (int) tvb_get_guint8(tvb, offset);
- proto_tree_add_text( tree, NullTVB, offset, tmpl + 1,
+ proto_tree_add_text( tree, tvb, offset, tmpl + 1,
"### Subnetwork Address Section ###");
- proto_tree_add_text( tree, NullTVB, offset++, 1, "BSNPAL: %2u Octets", tmpl);
- proto_tree_add_text( tree, NullTVB, offset, tmpl,
- " BSNPA: %s", print_system_id( &pd[offset], tmpl ) );
+ proto_tree_add_text( tree, tvb, offset++, 1, "BSNPAL: %2u Octets", tmpl);
+ proto_tree_add_text( tree, tvb, offset, tmpl,
+ " BSNPA: %s",
+ print_system_id( tvb_get_ptr(tvb, offset, tmpl), tmpl ) );
offset += tmpl;
len -= ( tmpl + 1 );
- tmpl = (int) pd[ offset ];
+ tmpl = (int) tvb_get_guint8(tvb, offset);
if ( 0 == tmpl ) {
- proto_tree_add_text( tree, NullTVB, offset, 1,
+ proto_tree_add_text( tree, tvb, offset, 1,
"### No Network Entity Title Section ###" );
offset++;
len--;
}
else {
- proto_tree_add_text( tree, NullTVB, offset, 1,
+ proto_tree_add_text( tree, tvb, offset, 1,
"### Network Entity Title Section ###" );
- proto_tree_add_text( tree, NullTVB, offset++, 1, "NETL: %2u Octets", tmpl );
- proto_tree_add_text( tree, NullTVB, offset, tmpl,
- " NET: %s", print_nsap_net( &pd[offset], tmpl ) );
+ proto_tree_add_text( tree, tvb, offset++, 1, "NETL: %2u Octets", tmpl );
+ proto_tree_add_text( tree, tvb, offset, tmpl,
+ " NET: %s",
+ print_nsap_net( tvb_get_ptr(tvb, offset, tmpl), tmpl ) );
offset += tmpl;
len -= ( tmpl + 1 );
}
- dissect_osi_options( PDU_TYPE_ESIS_RD, len, pd, offset, fd, tree );
+ dissect_osi_options( PDU_TYPE_ESIS_RD, len, tvb, offset, pinfo, tree );
}
}
@@ -280,9 +276,7 @@ esis_dissect_redirect_pdu( u_char len, const u_char *pd, int offset,
* main esis tree data and call the sub-protocols as needed.
*
* Input:
- * u_char * : packet data
- * int : offset into packet where we are (packet_data[offset]== start
- * of what we care about)
+ * tvbuff * : tvbuff referring to packet data
* frame_data * : frame data (whole packet with extra info)
* proto_tree * : tree of display data. May be NULL.
*
@@ -290,70 +284,65 @@ esis_dissect_redirect_pdu( u_char len, const u_char *pd, int offset,
* void, but we will add to the proto_tree if it is not NULL.
*/
static void
-dissect_esis(const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
+dissect_esis(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) {
char *pdu_type_string = NULL;
char *pdu_type_format_string = "PDU Type : %s (R:%s%s%s)";
- esis_hdr_t *ehdr;
+ esis_hdr_t ehdr;
proto_item *ti;
proto_tree *esis_tree = NULL;
int variable_len = 0;
u_int tmp_uint = 0;
- OLD_CHECK_DISPLAY_AS_DATA(proto_esis, pd, offset, fd, tree);
+ CHECK_DISPLAY_AS_DATA(proto_esis, tvb, pinfo, tree);
- if (check_col(fd, COL_PROTOCOL))
- col_add_str(fd, COL_PROTOCOL, "ESIS");
+ pinfo->current_proto = "ESIS";
- if (!BYTES_ARE_IN_FRAME(offset, sizeof(*ehdr))) {
- esis_dissect_unknown(offset, sizeof(*ehdr), tree, fd,
- "Not enough capture data for header (%d vs %d)",
- sizeof(*ehdr), END_OF_FRAME);
- return;
- }
+ if (check_col(pinfo->fd, COL_PROTOCOL))
+ col_add_str(pinfo->fd, COL_PROTOCOL, "ESIS");
- ehdr = (esis_hdr_t *) &pd[offset];
+ tvb_memcpy(tvb, (guint8 *)&ehdr, 0, sizeof ehdr);
- if (ehdr->esis_version != ESIS_REQUIRED_VERSION){
- esis_dissect_unknown(offset, END_OF_FRAME, tree, fd,
- "Unknown ESIS version (%d vs %d)",
- ehdr->esis_version, ESIS_REQUIRED_VERSION );
- return;
- }
-
if (tree) {
- ti = proto_tree_add_item(tree, proto_esis, NullTVB, offset, END_OF_FRAME, FALSE);
+ ti = proto_tree_add_item(tree, proto_esis, tvb, 0, tvb_length(tvb), FALSE);
esis_tree = proto_item_add_subtree(ti, ett_esis);
- proto_tree_add_uint( esis_tree, hf_esis_nlpi, NullTVB, offset, 1, ehdr->esis_nlpi );
- proto_tree_add_uint( esis_tree, hf_esis_length, NullTVB,
- offset + 1, 1, ehdr->esis_length );
- proto_tree_add_uint( esis_tree, hf_esis_version, NullTVB, offset + 2, 1,
- ehdr->esis_version );
- proto_tree_add_uint( esis_tree, hf_esis_reserved, NullTVB, offset + 3, 1,
- ehdr->esis_reserved );
-
- pdu_type_string = val_to_str(ehdr->esis_type&OSI_PDU_TYPE_MASK,
+ if (ehdr.esis_version != ESIS_REQUIRED_VERSION){
+ esis_dissect_unknown(tvb, pinfo, esis_tree,
+ "Unknown ESIS version (%u vs %u)",
+ ehdr.esis_version, ESIS_REQUIRED_VERSION );
+ return;
+ }
+
+ proto_tree_add_uint( esis_tree, hf_esis_nlpi, tvb, 0, 1, ehdr.esis_nlpi );
+ proto_tree_add_uint( esis_tree, hf_esis_length, tvb,
+ 1, 1, ehdr.esis_length );
+ proto_tree_add_uint( esis_tree, hf_esis_version, tvb, 2, 1,
+ ehdr.esis_version );
+ proto_tree_add_uint( esis_tree, hf_esis_reserved, tvb, 3, 1,
+ ehdr.esis_reserved );
+
+ pdu_type_string = val_to_str(ehdr.esis_type&OSI_PDU_TYPE_MASK,
esis_vals, "Unknown (0x%x)");
- proto_tree_add_uint_format( esis_tree, hf_esis_type, NullTVB, offset + 4, 1,
- ehdr->esis_type,
+ proto_tree_add_uint_format( esis_tree, hf_esis_type, tvb, 4, 1,
+ ehdr.esis_type,
pdu_type_format_string,
pdu_type_string,
- (ehdr->esis_type&BIT_8) ? "1" : "0",
- (ehdr->esis_type&BIT_7) ? "1" : "0",
- (ehdr->esis_type&BIT_6) ? "1" : "0");
+ (ehdr.esis_type&BIT_8) ? "1" : "0",
+ (ehdr.esis_type&BIT_7) ? "1" : "0",
+ (ehdr.esis_type&BIT_6) ? "1" : "0");
- tmp_uint = pntohs( ehdr->esis_holdtime );
- proto_tree_add_uint_format(esis_tree, hf_esis_holdtime, NullTVB, offset + 5, 2,
+ tmp_uint = pntohs( ehdr.esis_holdtime );
+ proto_tree_add_uint_format(esis_tree, hf_esis_holdtime, tvb, 5, 2,
tmp_uint, "Holding Time : %u seconds",
tmp_uint );
- tmp_uint = pntohs( ehdr->esis_checksum );
+ tmp_uint = pntohs( ehdr.esis_checksum );
- proto_tree_add_uint_format( esis_tree, hf_esis_checksum, NullTVB, offset + 7, 2,
+ proto_tree_add_uint_format( esis_tree, hf_esis_checksum, tvb, 7, 2,
tmp_uint, "Checksum : 0x%x ( %s )",
- tmp_uint, calc_checksum( &pd[offset],
- ehdr->esis_length ,
+ tmp_uint, calc_checksum( tvb, 0,
+ ehdr.esis_length ,
tmp_uint ) );
}
@@ -363,34 +352,35 @@ dissect_esis(const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
* here. First, dump the name into info column, and THEN
* dispatch the sub-type.
*/
- if (check_col(fd, COL_INFO)) {
- col_add_str(fd, COL_INFO,
- val_to_str( ehdr->esis_type&OSI_PDU_TYPE_MASK, esis_vals,
+ if (check_col(pinfo->fd, COL_INFO)) {
+ col_add_str(pinfo->fd, COL_INFO,
+ val_to_str( ehdr.esis_type&OSI_PDU_TYPE_MASK, esis_vals,
"Unknown (0x%x)" ) );
}
- variable_len = ehdr->esis_length - ESIS_HDR_FIXED_LENGTH;
+ variable_len = ehdr.esis_length - ESIS_HDR_FIXED_LENGTH;
- switch (ehdr->esis_type) {
+ switch (ehdr.esis_type & OSI_PDU_TYPE_MASK) {
case ESIS_ESH_PDU:
- esis_dissect_esh_pdu( variable_len, pd, offset, fd, esis_tree);
+ esis_dissect_esh_pdu( variable_len, tvb, pinfo, esis_tree);
break;
case ESIS_ISH_PDU:
- esis_dissect_ish_pdu( variable_len, pd, offset, fd, esis_tree);
+ esis_dissect_ish_pdu( variable_len, tvb, pinfo, esis_tree);
break;
case ESIS_RD_PDU:
- esis_dissect_redirect_pdu( variable_len, pd, offset, fd,
+ esis_dissect_redirect_pdu( variable_len, tvb, pinfo,
esis_tree);
break;
default:
- esis_dissect_unknown(offset, END_OF_FRAME, tree, fd,
- "unknown esis packet type" );
+ esis_dissect_unknown(tvb, pinfo, esis_tree,
+ "Unknown ESIS packet type 0x%x",
+ ehdr.esis_type & OSI_PDU_TYPE_MASK );
}
} /* dissect_esis */
/*
- * Name: proto_register_esisesis()
+ * Name: proto_register_esis()
*
* Description:
* main register for esis protocol set. We register some display
@@ -442,5 +432,5 @@ proto_register_esis(void) {
void
proto_reg_handoff_esis(void)
{
- old_dissector_add("osinl", NLPID_ISO9542_ESIS, dissect_esis);
+ dissector_add("osinl", NLPID_ISO9542_ESIS, dissect_esis);
}
generated by cgit v1.2.3 (git 2.25.1) at 2025-02-26 23:33:41 +0000