/* Note: updates *offset */
static void add_notification_data_ipv4addr(tvbuff_t *tvb, proto_tree *tree, int *offset, const char *addrtype)
{
guint32 ipaddr;
proto_tree_add_item(tree, hf_msdp_not_res, tvb, *offset, 3, ENC_BIG_ENDIAN);
*offset += 3;
ipaddr = tvb_get_ipv4(tvb, *offset);
proto_tree_add_ipv4_format(tree, hf_msdp_not_ipv4, tvb, *offset, 4, ipaddr,
"%s: %s", addrtype, ip_to_str((guint8 *)&ipaddr));
*offset += 4;
return;
}
static int
dissect_v3_report(tvbuff_t *tvb, proto_tree *parent_tree, int offset)
{
guint8 m0,m1,m2,m3;
guint8 s0,s1,s2,s3;
guint8 metric;
guint32 ip;
while (tvb_reported_length_remaining(tvb, offset) > 0) {
proto_tree *tree;
proto_item *item;
int old_offset_a = offset;
item = proto_tree_add_item(parent_tree, hf_route,
tvb, offset, -1, ENC_NA);
tree = proto_item_add_subtree(item, ett_route);
m0 = 0xff;
/* read the mask */
m1 = tvb_get_guint8(tvb, offset);
m2 = tvb_get_guint8(tvb, offset+1);
m3 = tvb_get_guint8(tvb, offset+2);
ip = m3;
ip = (ip<<8)|m2;
ip = (ip<<8)|m1;
ip = (ip<<8)|m0;
proto_tree_add_ipv4(tree, hf_netmask, tvb, offset, 3, ip);
offset += 3;
/* read every srcnet, metric pairs */
do {
int old_offset_b = offset;
m0 = 0xff;
s1 = 0;
s2 = 0;
s3 = 0;
s0 = tvb_get_guint8(tvb, offset);
offset += 1;
if (m1) {
s1 = tvb_get_guint8(tvb, offset);
offset += 1;
}
if (m2) {
s2 = tvb_get_guint8(tvb, offset);
offset += 1;
}
if (m3) {
s3 = tvb_get_guint8(tvb, offset);
offset += 1;
}
/* handle special case for default route V3/3.4.3 */
if ((!m1)&&(!m2)&&(!m3)&&(!s0)) {
m0 = 0;
}
ip = s3;
ip = (ip<<8)|s2;
ip = (ip<<8)|s1;
ip = (ip<<8)|s0;
proto_tree_add_ipv4_format(tree, hf_saddr, tvb,
old_offset_b, offset-old_offset_b, ip,
"%s %d.%d.%d.%d (netmask %d.%d.%d.%d)",
m0?"Source Network":"Default Route",
s0,s1,s2,s3,m0,m1,m2,m3);
metric = tvb_get_guint8(tvb, offset);
proto_tree_add_uint(tree, hf_metric, tvb,
offset, 1, metric&0x7f);
offset += 1;
} while (!(metric&0x80));
proto_item_set_len(item, offset-old_offset_a);
}
return offset;
}
