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Merge pull request #10229 from miri64/gnrc_ipv6_ext/enh/shortcut-forward

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gnrc_ipv6_ext: use send for forwarding with RH
This commit is contained in:
Martine Lenders 2018-12-06 16:17:50 +01:00 committed by GitHub
commit 9bb458dac1
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1 changed files with 34 additions and 5 deletions
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39
sys/net/gnrc/network_layer/ipv6/ext/gnrc_ipv6_ext.c
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@ -26,6 +26,39 @@
#include "debug.h"
#ifdef MODULE_GNRC_IPV6_EXT_RH
/* unchecked precondition: hdr is gnrc_pktsnip_t::data of the
* GNRC_NETTYPE_IPV6 snip within pkt */
static void _forward_pkt(gnrc_pktsnip_t *pkt, ipv6_hdr_t *hdr)
{
gnrc_pktsnip_t *netif_snip;
if (--(hdr->hl) == 0) {
DEBUG("ipv6_ext_rh: hop limit reached 0: drop packet\n");
gnrc_pktbuf_release(pkt);
return;
}
/* remove L2 headers around IPV6 */
netif_snip = gnrc_pktsnip_search_type(pkt, GNRC_NETTYPE_NETIF);
if (netif_snip != NULL) {
pkt = gnrc_pktbuf_remove_snip(pkt, netif_snip);
}
/* reverse packet into send order */
pkt = gnrc_pktbuf_reverse_snips(pkt);
if (pkt == NULL) {
DEBUG("ipv6_ext_rh: can't reverse snip order in packet");
/* gnrc_pktbuf_reverse_snips() releases pkt on error */
return;
}
/* forward packet */
if (!gnrc_netapi_dispatch_send(GNRC_NETTYPE_IPV6,
GNRC_NETREG_DEMUX_CTX_ALL,
pkt)) {
DEBUG("ipv6_ext_rh: could not dispatch packet to the IPv6 "
"thread\n");
gnrc_pktbuf_release(pkt);
}
}
static int _handle_rh(gnrc_pktsnip_t *current, gnrc_pktsnip_t *pkt)
{
gnrc_pktsnip_t *ipv6;
@ -67,11 +100,7 @@ static int _handle_rh(gnrc_pktsnip_t *current, gnrc_pktsnip_t *pkt)
break;
case GNRC_IPV6_EXT_RH_FORWARDED:
/* forward packet */
if (!gnrc_netapi_dispatch_receive(GNRC_NETTYPE_IPV6, GNRC_NETREG_DEMUX_CTX_ALL, pkt)) {
DEBUG("ipv6: could not dispatch packet to the ipv6 thread\n");
gnrc_pktbuf_release(pkt);
}
_forward_pkt(pkt, hdr);
break;
case GNRC_IPV6_EXT_RH_AT_DST: