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Merge pull request #6071 from melshuber/iphc_issue

gnrc_sixlowpan_iphc: Fixed encoding when COMP=0
pr/spi.typo
Martine Lenders 6 years ago committed by GitHub
parent
commit
0c22fffcd1
  1. 20
      sys/net/gnrc/network_layer/sixlowpan/iphc/gnrc_sixlowpan_iphc.c

20
sys/net/gnrc/network_layer/sixlowpan/iphc/gnrc_sixlowpan_iphc.c

@ -612,20 +612,28 @@ bool gnrc_sixlowpan_iphc_encode(gnrc_pktsnip_t *pkt)
/* check for available contexts */
if (!ipv6_addr_is_unspecified(&(ipv6_hdr->src))) {
src_ctx = gnrc_sixlowpan_ctx_lookup_addr(&(ipv6_hdr->src));
/* do not use source context for compression if */
/* GNRC_SIXLOWPAN_CTX_FLAGS_COMP is not set */
if (src_ctx && !(src_ctx->flags_id & GNRC_SIXLOWPAN_CTX_FLAGS_COMP)) {
src_ctx = NULL;
}
}
if (!ipv6_addr_is_multicast(&ipv6_hdr->dst)) {
dst_ctx = gnrc_sixlowpan_ctx_lookup_addr(&(ipv6_hdr->dst));
/* do not use destination context for compression if */
/* GNRC_SIXLOWPAN_CTX_FLAGS_COMP is not set */
if (dst_ctx && !(dst_ctx->flags_id & GNRC_SIXLOWPAN_CTX_FLAGS_COMP)) {
dst_ctx = NULL;
}
}
/* if contexts available and both != 0 */
/* since this moves inline_pos we have to do this ahead*/
if (((src_ctx != NULL) &&
((src_ctx->flags_id & GNRC_SIXLOWPAN_CTX_FLAGS_CID_MASK) != 0) &&
(src_ctx->flags_id & GNRC_SIXLOWPAN_CTX_FLAGS_COMP)) ||
((src_ctx->flags_id & GNRC_SIXLOWPAN_CTX_FLAGS_CID_MASK) != 0)) ||
((dst_ctx != NULL) &&
((dst_ctx->flags_id & GNRC_SIXLOWPAN_CTX_FLAGS_CID_MASK) != 0) &&
(dst_ctx->flags_id & GNRC_SIXLOWPAN_CTX_FLAGS_COMP))) {
((dst_ctx->flags_id & GNRC_SIXLOWPAN_CTX_FLAGS_CID_MASK) != 0))) {
/* add context identifier extension */
iphc_hdr[IPHC2_IDX] |= SIXLOWPAN_IPHC2_CID_EXT;
iphc_hdr[CID_EXT_IDX] = 0;
@ -704,7 +712,7 @@ bool gnrc_sixlowpan_iphc_encode(gnrc_pktsnip_t *pkt)
iphc_hdr[IPHC2_IDX] |= IPHC_SAC_SAM_UNSPEC;
}
else {
if ((src_ctx != NULL) && (src_ctx->flags_id & GNRC_SIXLOWPAN_CTX_FLAGS_COMP)) {
if (src_ctx != NULL) {
/* stateful source address compression */
iphc_hdr[IPHC2_IDX] |= SIXLOWPAN_IPHC2_SAC;
@ -829,7 +837,7 @@ bool gnrc_sixlowpan_iphc_encode(gnrc_pktsnip_t *pkt)
}
}
}
else if ((((dst_ctx != NULL) && (dst_ctx->flags_id & GNRC_SIXLOWPAN_CTX_FLAGS_COMP)) ||
else if (((dst_ctx != NULL) ||
ipv6_addr_is_link_local(&ipv6_hdr->dst)) && (netif_hdr->dst_l2addr_len > 0)) {
eui64_t iid;

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