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Merge pull request #11970 from miri64/gnrc_ipv6/fix/check-source-for-send

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gnrc_ipv6: check validity of preconfigured source on send
This commit is contained in:
Kevin "Bear Puncher" Weiss 2019-08-08 13:39:47 +02:00 committed by GitHub
commit 10a2794c8e
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1 changed files with 31 additions and 0 deletions
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31
sys/net/gnrc/network_layer/ipv6/gnrc_ipv6.c
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@ -351,6 +351,37 @@ static int _fill_ipv6_hdr(gnrc_netif_t *netif, gnrc_pktsnip_t *ipv6)
/* Otherwise leave unspecified */
}
}
else {
bool invalid_src;
int idx;
gnrc_netif_acquire(netif);
invalid_src = ((idx = gnrc_netif_ipv6_addr_idx(netif, &hdr->src)) == -1) ||
(gnrc_netif_ipv6_addr_get_state(netif, idx) != GNRC_NETIF_IPV6_ADDRS_FLAGS_STATE_VALID);
gnrc_netif_release(netif);
if (invalid_src) {
#if GNRC_IPV6_NIB_CONF_6LN
gnrc_pktsnip_t *icmpv6 = gnrc_pktsnip_search_type(ipv6,
GNRC_NETTYPE_ICMPV6);
icmpv6_hdr_t *icmpv6_hdr;
if (icmpv6 != NULL) {
icmpv6_hdr = icmpv6->data;
}
if ((icmpv6 == NULL) ||
((icmpv6_hdr->type != ICMPV6_RTR_SOL) &&
(icmpv6_hdr->type != ICMPV6_NBR_SOL))) {
DEBUG("ipv6: preset packet source address %s is invalid\n",
ipv6_addr_to_str(addr_str, &hdr->src, sizeof(addr_str)));
return -EADDRNOTAVAIL;
}
#else /* GNRC_IPV6_NIB_CONF_6LN */
DEBUG("ipv6: preset packet source address %s is invalid\n",
ipv6_addr_to_str(addr_str, &hdr->src, sizeof(addr_str)));
return -EADDRNOTAVAIL;
#endif /* GNRC_IPV6_NIB_CONF_6LN */
}
}
DEBUG("ipv6: write protect up to payload to calculate checksum\n");
payload = ipv6;