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igmp.c: Fix bug #20595 to accept IGMPv3 "Query" messages.

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This commit is contained in:
fbernon
2007-07-26 17:10:56 +00:00
parent 33054a18db
commit 42eead8f41
2 changed files with 10 additions and 8 deletions
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15
src/core/ipv4/igmp.c
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@@ -209,21 +209,20 @@ igmp_input(struct pbuf *p, struct netif *inp, struct ip_addr *dest)
struct igmp_group* group;
struct igmp_group* groupref;
iphdr = p->payload;
igmp = (struct igmpmsg *)(((u8_t *)p->payload)+((u32_t)(IPH_HL(iphdr) * 4)));
LWIP_DEBUGF(IGMP_DEBUG, ("igmp message to address %l \n", (long)dest->addr));
if (p->len < IGMP_MINLEN) {
/* Note that the length CAN be greater than 8 but only 8 are used - All are included in the checksum */
/* Note that the length CAN be greater than 8 but only 8 are used - All are included in the checksum */
iphdr = p->payload;
if (pbuf_header(p, -(IPH_HL(iphdr) * 4)) || (p->len < IGMP_MINLEN)) {
pbuf_free(p);
igmpstats.igmp_length_err++;
LWIP_DEBUGF(IGMP_DEBUG, ("igmp.c,Line %x igmp length error\n", __LINE__));
return;
}
LWIP_DEBUGF(IGMP_DEBUG, ("igmp message to address %l \n", (long)dest->addr));
/* Now calculate and check the checksum */
if (inet_chksum(igmp, IGMP_MINLEN /*p->len*/)) {
igmp = (struct igmpmsg *)p->payload;
if (inet_chksum(igmp, p->len)) {
pbuf_free(p);
igmpstats.igmp_checksum_err++;
LWIP_DEBUGF(IGMP_DEBUG, ("igmp.c,Line %d igmp checksum error\n", __LINE__));