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gnrc_ipv6: check link MTU before sending

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This commit is contained in:
Martine Lenders 2015-08-20 15:25:21 +02:00
parent f1864fd2b6
commit d88ae14d90
1 changed files with 11 additions and 12 deletions
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25
sys/net/gnrc/network_layer/ipv6/gnrc_ipv6.c
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@ -11,6 +11,7 @@
*
* @file
*/
#include <assert.h>
#include <errno.h>
#include <inttypes.h>
#include <stdbool.h>
@ -192,31 +193,29 @@ static void *_event_loop(void *args)
return NULL;
}
#ifdef MODULE_GNRC_SIXLOWPAN
static void _send_to_iface(kernel_pid_t iface, gnrc_pktsnip_t *pkt)
{
((gnrc_netif_hdr_t *)pkt->data)->if_pid = iface;
gnrc_ipv6_netif_t *if_entry = gnrc_ipv6_netif_get(iface);
((gnrc_netif_hdr_t *)pkt->data)->if_pid = iface;
assert(if_entry != NULL);
if (gnrc_pkt_len(pkt->next) > if_entry->mtu) {
DEBUG("ipv6: packet too big\n");
gnrc_pktbuf_release(pkt);
return;
}
#ifdef MODULE_GNRC_SIXLOWPAN
if ((if_entry != NULL) && (if_entry->flags & GNRC_IPV6_NETIF_FLAGS_SIXLOWPAN)) {
DEBUG("ipv6: send to 6LoWPAN instead\n");
if (!gnrc_netapi_dispatch_send(GNRC_NETTYPE_SIXLOWPAN, GNRC_NETREG_DEMUX_CTX_ALL, pkt)) {
DEBUG("ipv6: no 6LoWPAN thread found");
gnrc_pktbuf_release(pkt);
}
return;
}
else {
gnrc_netapi_send(iface, pkt);
}
}
#else
static inline void _send_to_iface(kernel_pid_t iface, gnrc_pktsnip_t *pkt)
{
((gnrc_netif_hdr_t *)pkt->data)->if_pid = iface;
gnrc_netapi_send(iface, pkt);
}
#endif
gnrc_netapi_send(iface, pkt);
}
/* functions for sending */
static void _send_unicast(kernel_pid_t iface, uint8_t *dst_l2addr,