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Add assertion that netif index is within sane range in sockets.h.

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We can assert here since lwIP only supports <= 255 netifs due to netif index being an u8_t.
This commit is contained in:
Dirk Ziegelmeier 2017-08-21 21:27:12 +02:00
parent fa51a7225a
commit b9d3812ee8
1 changed files with 1 additions and 0 deletions
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src/api/sockets.c
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@ -3187,6 +3187,7 @@ lwip_setsockopt_impl(int s, int level, int optname, const void *optval, socklen_
const struct ipv6_mreq *imr = (const struct ipv6_mreq *)optval;
LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB_TYPE(sock, optlen, struct ipv6_mreq, NETCONN_UDP);
inet6_addr_to_ip6addr(&multi_addr, &imr->ipv6mr_multiaddr);
LWIP_ASSERT("Invalid netif index", imr->ipv6mr_interface <= 0xFFu);
netif = netif_get_by_index((u8_t)imr->ipv6mr_interface);
if (netif == NULL) {
err = EADDRNOTAVAIL;