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added support for dissecting SRV RRs 

svn path=/trunk/; revision=3058
This commit is contained in:
Nathan Neulinger 2001-02-20 16:25:52 +00:00
parent f49d4467fc
commit 4f2ef9c564
1 changed files with 67 additions and 1 deletions
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68
packet-dns.c
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@ -1,7 +1,7 @@
/* packet-dns.c
* Routines for DNS packet disassembly
*
* $Id: packet-dns.c,v 1.63 2001/02/20 07:17:20 itojun Exp $
* $Id: packet-dns.c,v 1.64 2001/02/20 16:25:52 nneul Exp $
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@zing.org>
@ -2153,6 +2153,72 @@ dissect_dns_answer(const u_char *pd, int offset, int dns_data_offset,
}
break;
case T_SRV:
{
guint16 priority = 0;
guint16 weight = 0;
guint16 port = 0;
char target[MAXDNAME];
int target_len;
if (!BYTES_ARE_IN_FRAME(cur_offset, 2)) {
/* We ran past the end of the captured data in the packet. */
if (dns_tree != NULL) {
proto_item_set_text(trr,
"%s: type %s, class %s, <priority goes past end of captured data in packet>",
name, type_name, class_name);
}
return 0;
}
priority = pntohs(&pd[cur_offset]);
if (!BYTES_ARE_IN_FRAME(cur_offset+2, 2)) {
/* We ran past the end of the captured data in the packet. */
if (dns_tree != NULL) {
proto_item_set_text(trr,
"%s: type %s, class %s, priority %u, <weight goes past end of captured data in packet>",
name, type_name, class_name, priority);
}
return 0;
}
weight = pntohs(&pd[cur_offset+2]);
if (!BYTES_ARE_IN_FRAME(cur_offset+4, 2)) {
/* We ran past the end of the captured data in the packet. */
if (dns_tree != NULL) {
proto_item_set_text(trr,
"%s: type %s, class %s, priority %u, weight %u, <port goes past end of captured data in packet>",
name, type_name, class_name, priority, weight);
}
return 0;
}
port = pntohs(&pd[cur_offset+4]);
target_len = get_dns_name(pd, cur_offset + 6, dns_data_offset, target, sizeof(target));
if (target_len < 0) {
/* We ran past the end of the captured data in the packet. */
if (dns_tree != NULL) {
proto_item_set_text(trr,
"%s: type %s, class %s, priority %u, weight %u, port %u, <target goes past end of captured data in packet>",
name, type_name, class_name, priority, weight, port);
}
return 0;
}
if (fd != NULL)
col_append_fstr(fd, COL_INFO, " %u %u %u %s", priority, weight, port, target);
if (dns_tree != NULL) {
proto_item_set_text(trr,
"%s: type %s, class %s, priority %u, weight %u, port %u, target %s",
name, type_name, class_name, priority, weight, port, target);
proto_tree_add_text(rr_tree, NullTVB, cur_offset, 2, "Priority: %u", priority);
proto_tree_add_text(rr_tree, NullTVB, cur_offset + 2, 2, "Weight: %u", weight);
proto_tree_add_text(rr_tree, NullTVB, cur_offset + 4, 2, "Port: %u", port);
proto_tree_add_text(rr_tree, NullTVB, cur_offset + 6, target_len, "Target: %s",
target);
}
}
break;
/* TODO: parse more record types */
default: