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Added comment to ip_input() packet filter.

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likewise 2002-12-11 00:21:12 +00:00
parent 40abd14884
commit 5472d94b73
1 changed files with 4 additions and 0 deletions
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4
src/core/ipv4/ip.c
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@ -312,10 +312,14 @@ ip_input(struct pbuf *p, struct netif *inp) {
netif->ip_addr.addr & netif->netmask.addr, netif->ip_addr.addr & netif->netmask.addr,
iphdr->dest.addr & ~(netif->netmask.addr))); iphdr->dest.addr & ~(netif->netmask.addr)));
/* interface unconfigured? */
if(ip_addr_isany(&(netif->ip_addr)) || if(ip_addr_isany(&(netif->ip_addr)) ||
/* or unicast to this interface address? */
ip_addr_cmp(&(iphdr->dest), &(netif->ip_addr)) || ip_addr_cmp(&(iphdr->dest), &(netif->ip_addr)) ||
/* or broadcast on this interface network address ? */
(ip_addr_isbroadcast(&(iphdr->dest), &(netif->netmask)) && (ip_addr_isbroadcast(&(iphdr->dest), &(netif->netmask)) &&
ip_addr_maskcmp(&(iphdr->dest), &(netif->ip_addr), &(netif->netmask))) || ip_addr_maskcmp(&(iphdr->dest), &(netif->ip_addr), &(netif->netmask))) ||
/* or restricted broadcast? */
ip_addr_cmp(&(iphdr->dest), IP_ADDR_BROADCAST)) { ip_addr_cmp(&(iphdr->dest), IP_ADDR_BROADCAST)) {
break; break;
} }