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6lo: Set more data flag on all but last frag

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This commit is contained in:
Joakim Nohlgård 2018-06-30 15:35:05 +02:00
parent 75a194e914
commit 58281e9135
1 changed files with 16 additions and 0 deletions
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16
sys/net/gnrc/network_layer/sixlowpan/frag/gnrc_sixlowpan_frag.c
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@ -117,6 +117,10 @@ static uint16_t _send_1st_fragment(gnrc_netif_t *iface, gnrc_pktsnip_t *pkt,
hdr->disp_size.u8[0] |= SIXLOWPAN_FRAG_1_DISP;
hdr->tag = byteorder_htons(_tag);
/* Tell the link layer that we will send more fragments */
gnrc_netif_hdr_t *netif_hdr = frag->data;
netif_hdr->flags |= GNRC_NETIF_HDR_FLAGS_MORE_DATA;
pkt = pkt->next; /* don't copy netif header */
while (pkt != NULL) {
@ -182,6 +186,13 @@ static uint16_t _send_nth_fragment(gnrc_netif_t *iface, gnrc_pktsnip_t *pkt,
memcpy(data, ((uint8_t *)pkt->data) + pkt_offset, clen);
local_offset = clen;
if (local_offset == max_frag_size) {
if ((clen < (pkt->size - pkt_offset)) || (pkt->next != NULL)) {
/* Tell the link layer that we will send more fragments */
gnrc_netif_hdr_t *netif_hdr = frag->data;
netif_hdr->flags |= GNRC_NETIF_HDR_FLAGS_MORE_DATA;
}
}
pkt = pkt->next;
break;
}
@ -197,6 +208,11 @@ static uint16_t _send_nth_fragment(gnrc_netif_t *iface, gnrc_pktsnip_t *pkt,
local_offset += clen;
if (local_offset == max_frag_size) {
if ((clen < pkt->size) || (pkt->next != NULL)) {
/* Tell the link layer that we will send more fragments */
gnrc_netif_hdr_t *netif_hdr = frag->data;
netif_hdr->flags |= GNRC_NETIF_HDR_FLAGS_MORE_DATA;
}
break;
}