void gnrc_sixlowpan_frag_send(kernel_pid_t pid, gnrc_pktsnip_t *pkt,
size_t datagram_size)
{
gnrc_sixlowpan_netif_t *iface = gnrc_sixlowpan_netif_get(pid);
uint16_t offset = 0, res;
/* payload_len: actual size of the packet vs
* datagram_size: size of the uncompressed IPv6 packet */
size_t payload_len = gnrc_pkt_len(pkt->next);
#if defined(DEVELHELP) && defined(ENABLE_DEBUG)
if (iface == NULL) {
DEBUG("6lo frag: iface == NULL, expect segmentation fault.\n");
gnrc_pktbuf_release(pkt);
return;
}
#endif
if ((res = _send_1st_fragment(iface, pkt, payload_len, datagram_size)) == 0) {
/* error sending first fragment */
DEBUG("6lo frag: error sending 1st fragment\n");
gnrc_pktbuf_release(pkt);
return;
}
offset += res;
thread_yield();
/* (offset + (datagram_size - payload_len) < datagram_size) simplified */
while (offset < payload_len) {
if ((res = _send_nth_fragment(iface, pkt, payload_len, datagram_size,
offset)) == 0) {
/* error sending subsequent fragment */
DEBUG("6lo frag: error sending subsequent fragment (offset = %" PRIu16
")\n", offset);
gnrc_pktbuf_release(pkt);
return;
}
offset += res;
thread_yield();
}
/* remove original packet from packet buffer */
gnrc_pktbuf_release(pkt);
_tag++;
}
void ng_sixlowpan_frag_send(kernel_pid_t pid, ng_pktsnip_t *pkt,
size_t payload_len, size_t datagram_size)
{
ng_sixlowpan_netif_t *iface = ng_sixlowpan_netif_get(pid);
uint16_t offset = 0, res;
#if defined(DEVELHELP) && defined(ENABLE_DEBUG)
if (iface == NULL) {
DEBUG("6lo frag: iface == NULL, expect segmentation fault.\n");
ng_pktbuf_release(pkt);
return;
}
#endif
if ((res = _send_1st_fragment(iface, pkt, payload_len, datagram_size)) == 0) {
/* error sending first fragment */
DEBUG("6lo frag: error sending 1st fragment\n");
ng_pktbuf_release(pkt);
return;
}
offset += res;
while (offset < datagram_size) {
if ((res = _send_nth_fragment(iface, pkt, payload_len, datagram_size,
offset)) == 0) {
/* error sending subsequent fragment */
DEBUG("6lo frag: error sending subsequent fragment (offset = %" PRIu16
")\n", offset);
ng_pktbuf_release(pkt);
return;
}
offset += res;
}
/* remove original packet from packet buffer */
ng_pktbuf_release(pkt);
_tag++;
}
void gnrc_sixlowpan_frag_send(gnrc_pktsnip_t *pkt, void *ctx, unsigned page)
{
assert(ctx != NULL);
gnrc_sixlowpan_msg_frag_t *fragment_msg = ctx;
gnrc_netif_t *iface = gnrc_netif_get_by_pid(fragment_msg->pid);
uint16_t res;
/* payload_len: actual size of the packet vs
* datagram_size: size of the uncompressed IPv6 packet */
size_t payload_len = gnrc_pkt_len(fragment_msg->pkt->next);
msg_t msg;
assert((fragment_msg->pkt == pkt) || (pkt == NULL));
(void)page;
(void)pkt;
#if defined(DEVELHELP) && ENABLE_DEBUG
if (iface == NULL) {
DEBUG("6lo frag: iface == NULL, expect segmentation fault.\n");
/* remove original packet from packet buffer */
gnrc_pktbuf_release(fragment_msg->pkt);
/* 6LoWPAN free for next fragmentation */
fragment_msg->pkt = NULL;
return;
}
#endif
/* Check whether to send the first or an Nth fragment */
if (fragment_msg->offset == 0) {
/* increment tag for successive, fragmented datagrams */
_tag++;
if ((res = _send_1st_fragment(iface, fragment_msg->pkt, payload_len, fragment_msg->datagram_size)) == 0) {
/* error sending first fragment */
DEBUG("6lo frag: error sending 1st fragment\n");
gnrc_pktbuf_release(fragment_msg->pkt);
fragment_msg->pkt = NULL;
return;
}
fragment_msg->offset += res;
/* send message to self*/
msg.type = GNRC_SIXLOWPAN_MSG_FRAG_SND;
msg.content.ptr = (void *)fragment_msg;
msg_send_to_self(&msg);
thread_yield();
}
else {
/* (offset + (datagram_size - payload_len) < datagram_size) simplified */
if (fragment_msg->offset < payload_len) {
if ((res = _send_nth_fragment(iface, fragment_msg->pkt, payload_len, fragment_msg->datagram_size,
fragment_msg->offset)) == 0) {
/* error sending subsequent fragment */
DEBUG("6lo frag: error sending subsequent fragment (offset = %" PRIu16
")\n", fragment_msg->offset);
gnrc_pktbuf_release(fragment_msg->pkt);
fragment_msg->pkt = NULL;
return;
}
fragment_msg->offset += res;
/* send message to self*/
msg.type = GNRC_SIXLOWPAN_MSG_FRAG_SND;
msg.content.ptr = (void *)fragment_msg;
msg_send_to_self(&msg);
thread_yield();
}
else {
gnrc_pktbuf_release(fragment_msg->pkt);
fragment_msg->pkt = NULL;
}
}
}