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sixlowpan: Fix conditions for encoding to 16 bit source addresses

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This commit is contained in:
Joakim Gebart 2015-02-27 15:06:18 +01:00
parent 0b479b28e8
commit 34457017cf
1 changed files with 5 additions and 6 deletions
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11
sys/net/network_layer/sixlowpan/lowpan.c
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@ -1011,12 +1011,11 @@ uint8_t lowpan_iphc_encoding(int if_id, const uint8_t *dest, int dest_len,
* and possibly the link-layer addresses.*/
lowpan_iphc[1] |= 0x30;
}
else if ((ipv6_buf->srcaddr.uint16[4] == 0) &&
(ipv6_buf->srcaddr.uint16[5] == 0) &&
(ipv6_buf->srcaddr.uint16[6] == 0) &&
((ipv6_buf->srcaddr.uint8[14]) & 0x80) == 0) {
/* 49-bit of interface identifier are 0, so we can compress
* source address-iid to 16-bit */
else if ((ipv6_buf->srcaddr.uint32[2] == HTONL(0x000000ffu)) &&
(ipv6_buf->srcaddr.uint16[6] == HTONL(0xfe00u))) {
/* The 48 leading bits of the interface identifier are
* 0000:00FF:FE00, so we can compress the source address-iid to
* 16-bit */
memcpy(&ipv6_hdr_fields[hdr_pos], &ipv6_buf->srcaddr.uint16[7], 2);
hdr_pos += 2;
/* 16 bits. The address is derived using context information