Hi all.
As in BLip it uses 6lowpan-hui-hc-00 to compress packets , I want to make
the blip also can send no compressed packet. THe dispatch is
LOWPAN_IPV6_PATTERN=0x41.
I only add some codes in lib6lowpanIP.c/unpackHeaders() and
packHeaders(). It can compile but node uploaded can not communicate.
Ip-drive on pc do not display the info: INFO: Starting to proxy for 0x1.
DO I have to change sth else ? plz give me some help.
thx a lot.
The code like following :
////////////////////////////
packheaders()
#ifdef TEST_NOCOMPRESS
{
*dispatch =LOWPAN_IPV6_PATTERN;
ip_memcpy(buf, (uint8_t *)hdr, 40);
buf +=40;
len -= (buf - dispatch);
while (cur != NULL) {
if (i==0 && nxt_hdr == IANA_UDP) {
if (len < sizeof(struct udp_hdr)) return (buf - dispatch);
ip_memcpy(buf, (uint8_t *)cur->hdr.udp, 8);
buf +=8;
}
else{
if (len < cur->len) return 0;
ip_memcpy(buf, (uint8_t *)cur->hdr.ext, cur->len);
len -= cur->len;
buf += cur->len;
}
cur = cur->next;
i++;
} //end while
}
#else .....
//////////////////////////
unpackheader()
if (dispatch ==LOWPAN_IPV6_PATTERN){
ip_memcpy(dest, buf, 6);
buf += 6;
dest += 6;
*dest=*buf;buf++; //next header
nxt_hdr = dest;
dest += 1;
*dest = *buf; //hoplimt
u_info->hlim = buf;
buf++;dest++;
ip_memcpy(dest, buf, 32);
buf += 32;
dest += 32;
if (*nxt_hdr==IANA_UDP){
struct udp_hdr *udp1 = (struct udp_hdr *)dest;
if (len < sizeof(struct udp_hdr)) return NULL;
len -= sizeof(struct udp_hdr);
extra_header_length = sizeof(struct udp_hdr);
ip_memcpy(dest, buf, 8);
buf += 8;
dest += 8;
u_info->nxt_hdr = IANA_UDP;
u_info->payload_offset += sizeof(struct udp_hdr);
u_info->transport_ptr = (uint8_t *)udp1;
}
else{ //not udp,the ipv6 extention header
nhdr = *nxt_hdr;
u_info->nxt_hdr = nhdr;
while (EXTENSION_HEADER(nhdr)) {
hdr = (struct ip6_ext *)buf;
switch (nhdr) {
case IPV6_HOP:
u_info->hdr_hop = (struct ip6_ext *)buf;
break;
case IPV6_ROUTING:
u_info->hdr_route = (struct ip6_route *)buf;
break;
case IPV6_DEST:
u_info->hdr_dest = (struct ip6_ext *)buf;
break;
}
nhdr = hdr->nxt_hdr;
nhdr_len = hdr->len;
u_info->nxt_hdr = nhdr;
if (len < nhdr_len) return NULL;
ip_memcpy(dest, buf, nhdr_len);
dest += nhdr_len;
buf += nhdr_len;
u_info->payload_offset += nhdr_len;
// extra_header_length += nhdr_len;
} //while till here
u_info->transport_ptr = dest;
} //end else
u_info->payload_start = buf;
u_info->header_end = dest;
if (u_info->transport_ptr == NULL)
u_info->transport_ptr = dest;
}
else { ... //hc-00 compress
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