static bool peer_addr_exist(struct sockaddr *peer_addr)
{
bool ret = false;
int i;
/* look for duplicate peer_addr */
for (i = 0; i < client_count; i++) {
#if defined(CONFIG_NET_IPV6)
if (peer_addr->family == AF_INET6 && net_ipv6_addr_cmp(
&net_sin6(&clients[i].bs_server)->sin6_addr,
&net_sin6(peer_addr)->sin6_addr)) {
ret = true;
break;
}
if (peer_addr->family == AF_INET6 && net_ipv6_addr_cmp(
&net_sin6(&clients[i].reg_server)->sin6_addr,
&net_sin6(peer_addr)->sin6_addr)) {
ret = true;
break;
}
#endif
#if defined(CONFIG_NET_IPV4)
if (peer_addr->family == AF_INET && net_ipv4_addr_cmp(
&net_sin(&clients[i].bs_server)->sin_addr,
&net_sin(peer_addr)->sin_addr)) {
ret = true;
break;
}
if (peer_addr->family == AF_INET && net_ipv4_addr_cmp(
&net_sin(&clients[i].reg_server)->sin_addr,
&net_sin(peer_addr)->sin_addr)) {
ret = true;
break;
}
#endif
}
return ret;
}
/* Check if the IPv{4|6} addresses are proper. As this can be expensive,
* make this optional.
*/
static inline int check_ip_addr(struct net_pkt *pkt)
{
#if defined(CONFIG_NET_IPV6)
if (net_pkt_family(pkt) == AF_INET6) {
if (net_ipv6_addr_cmp(&NET_IPV6_HDR(pkt)->dst,
net_ipv6_unspecified_address())) {
NET_DBG("IPv6 dst address missing");
return -EADDRNOTAVAIL;
}
/* If the destination address is our own, then route it
* back to us.
*/
if (net_is_ipv6_addr_loopback(&NET_IPV6_HDR(pkt)->dst) ||
net_is_my_ipv6_addr(&NET_IPV6_HDR(pkt)->dst)) {
struct in6_addr addr;
/* Swap the addresses so that in receiving side
* the packet is accepted.
*/
net_ipaddr_copy(&addr, &NET_IPV6_HDR(pkt)->src);
net_ipaddr_copy(&NET_IPV6_HDR(pkt)->src,
&NET_IPV6_HDR(pkt)->dst);
net_ipaddr_copy(&NET_IPV6_HDR(pkt)->dst, &addr);
return 1;
}
/* The source check must be done after the destination check
* as having src ::1 is perfectly ok if dst is ::1 too.
*/
if (net_is_ipv6_addr_loopback(&NET_IPV6_HDR(pkt)->src)) {
NET_DBG("IPv6 loopback src address");
return -EADDRNOTAVAIL;
}
} else
#endif /* CONFIG_NET_IPV6 */
#if defined(CONFIG_NET_IPV4)
if (net_pkt_family(pkt) == AF_INET) {
if (net_ipv4_addr_cmp(&NET_IPV4_HDR(pkt)->dst,
net_ipv4_unspecified_address())) {
return -EADDRNOTAVAIL;
}
/* If the destination address is our own, then route it
* back to us.
*/
if (net_is_ipv4_addr_loopback(&NET_IPV4_HDR(pkt)->dst) ||
net_is_my_ipv4_addr(&NET_IPV4_HDR(pkt)->dst)) {
struct in_addr addr;
/* Swap the addresses so that in receiving side
* the packet is accepted.
*/
net_ipaddr_copy(&addr, &NET_IPV4_HDR(pkt)->src);
net_ipaddr_copy(&NET_IPV4_HDR(pkt)->src,
&NET_IPV4_HDR(pkt)->dst);
net_ipaddr_copy(&NET_IPV4_HDR(pkt)->dst, &addr);
return 1;
}
/* The source check must be done after the destination check
* as having src 127.0.0.0/8 is perfectly ok if dst is in
* localhost subnet too.
*/
if (net_is_ipv4_addr_loopback(&NET_IPV4_HDR(pkt)->src)) {
NET_DBG("IPv4 loopback src address");
return -EADDRNOTAVAIL;
}
} else
#endif /* CONFIG_NET_IPV4 */
{
;
}
return 0;
}
