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Check to make sure the address really *is* an IPv4 address. 

If it is, convert the "void *" data pointer to a "guint8 *", so we can
look at the first byte.

svn path=/trunk/; revision=21575
This commit is contained in:
Guy Harris 2007-04-26 00:01:29 +00:00
parent e077465aa4
commit 2a48544203
1 changed files with 4 additions and 1 deletions
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5
epan/dissectors/packet-igrp.c
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@ -56,6 +56,7 @@ static void dissect_igrp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
guint8 ver_and_opcode,version,opcode,update,network;
gint offset=IGRP_HEADER_LENGTH;
guint16 as,net1,net2,net3;
const guint8 *ipsrc;
proto_item *ti;
proto_tree *igrp_tree, *igrp_vektor_tree;
tvbuff_t *next_tvb;
@ -105,7 +106,9 @@ static void dissect_igrp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
net3 = tvb_get_ntohs(tvb,8);
/* this is a ugly hack to find the first byte of the IP source address */
network = pinfo->net_src.data[0];
DISSECTOR_ASSERT(pinfo->net_src.type == AT_IPv4);
ipsrc = pinfo->net_src.data;
network = ipsrc[0];
ti = proto_tree_add_text(igrp_tree, tvb, 4,2,"Interior routes : %d",net1);
for( ; net1>0 ; net1-- )