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| author | Guy Harris <guy@alum.mit.edu> | 2002-02-01 11:01:57 +0000 |
|---|---|---|
| committer | Guy Harris <guy@alum.mit.edu> | 2002-02-01 11:01:57 +0000 |
| commit | c2c2154712efefd1baa2c747cf6583cc63f46787 (patch) | |
| tree | 020f8b112ff8f95e1d5c41be4f69af464ab250ef /packet-dvmrp.c | |
| parent | 81bad7e2e6ab4c8dd1b3aa002e5ff7e157be7914 (diff) | |
| download | wireshark-c2c2154712efefd1baa2c747cf6583cc63f46787.tar.gz wireshark-c2c2154712efefd1baa2c747cf6583cc63f46787.tar.bz2 wireshark-c2c2154712efefd1baa2c747cf6583cc63f46787.zip | |
Export "igmp_checksum()" from the IGMP dissector and give it additional
arguments that specify the header field indices for the checksum field
and the "checksum is bad" Boolean, and have the dissectors for some
protocols that use IGMP (DVMRP, MRDISC, MSNIP) use it rather than having
their own checksumming routines.
Also, fix it to correctly add the "checksum is bad" Boolean.
svn path=/trunk/; revision=4665
Diffstat (limited to 'packet-dvmrp.c')
| -rw-r--r-- | packet-dvmrp.c | 32 |
1 files changed, 4 insertions, 28 deletions
diff --git a/packet-dvmrp.c b/packet-dvmrp.c index c8624226fa..f879cfeb5e 100644 --- a/packet-dvmrp.c +++ b/packet-dvmrp.c @@ -1,7 +1,7 @@ /* packet-dvmrp.c 2001 Ronnie Sahlberg <See AUTHORS for email> * Routines for IGMP/DVMRP packet disassembly * - * $Id: packet-dvmrp.c,v 1.7 2002/01/21 07:36:34 guy Exp $ + * $Id: packet-dvmrp.c,v 1.8 2002/02/01 11:01:56 guy Exp $ * * Ethereal - Network traffic analyzer * By Gerald Combs <gerald@ethereal.com> @@ -65,7 +65,7 @@ #include <epan/packet.h> #include "ipproto.h" -#include "in_cksum.h" +#include "packet-igmp.h" #include "packet-dvmrp.h" static int proto_dvmrp = -1; @@ -214,29 +214,6 @@ static const true_false_string tfs_cap_netmask = { "NOT Netmask capable" }; -static void dvmrp_checksum(proto_tree *tree,tvbuff_t *tvb, int len) -{ - guint16 cksum,hdrcksum; - vec_t cksum_vec[1]; - - cksum_vec[0].ptr = tvb_get_ptr(tvb, 0, len); - cksum_vec[0].len = len; - - hdrcksum = tvb_get_ntohs(tvb, 2); - cksum = in_cksum(&cksum_vec[0],1); - - if (cksum==0) { - proto_tree_add_uint_format(tree, hf_checksum, tvb, 2, 2, hdrcksum, "Header checksum: 0x%04x (correct)", hdrcksum); - } else { - proto_tree_add_item_hidden(tree, hf_checksum_bad, tvb, 2, 2, TRUE); - proto_tree_add_uint_format(tree, hf_checksum, tvb, 2, 2, hdrcksum, "Header checksum: 0x%04x (incorrect, should be 0x%04x)", hdrcksum,in_cksum_shouldbe(hdrcksum,cksum)); - } - - return; -} - - - int dissect_v3_report(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tree, int offset) { @@ -345,7 +322,7 @@ dissect_dvmrp_v3(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tree, int } /* checksum */ - dvmrp_checksum(parent_tree, tvb, tvb_length_remaining(tvb, 0)); + igmp_checksum(parent_tree, tvb, hf_checksum, hf_checksum_bad, pinfo, 0); offset += 2; /* skip unused byte */ @@ -475,7 +452,7 @@ dissect_dvmrp_v1(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tree, int } /* checksum */ - dvmrp_checksum(parent_tree, tvb, tvb_length_remaining(tvb, 0)); + igmp_checksum(parent_tree, tvb, hf_checksum, hf_checksum_bad, pinfo, 0); offset += 2; /* decode all the v1 commands */ @@ -812,4 +789,3 @@ proto_register_dvmrp(void) proto_register_field_array(proto_dvmrp, hf, array_length(hf)); proto_register_subtree_array(ett, array_length(ett)); } - |