int run_tests() {
int i;
int success = 0, total = 0;
for (i = 0; i < (sizeof(cases) / sizeof(cases[0])); i++) {
uint8_t buf[512], *rp, unpack[512];
struct ip6_packet packet;
struct ieee154_frame_addr fr, result_fr;
memset(buf, 0, 512);
total++;
printf("\n\n----- Test case %i ----\n", i+1);
setup_test(&cases[i], &packet.ip6_hdr, &fr);
printf("IEEE 802.15.4 frame: ");
print_buffer(&fr, sizeof(struct ieee154_frame_addr));
printf("\n");
printf("IPv6 Header:\n");
print_buffer(&packet.ip6_hdr, sizeof(struct ip6_hdr));
printf("\n");
rp = lowpan_pack_headers(&packet, &fr, buf, 512);
printf("Packed result:\n");
print_buffer(buf, rp - buf);
rp = lowpan_unpack_headers(unpack, sizeof(unpack), &result_fr, buf, rp - buf);
printf("Unpacked result:\n");
print_buffer(unpack, 40);
if (memcmp(unpack, &packet.ip6_hdr, 40) == 0)
success++;
}
printf("%s: %i/%i tests succeeded\n", __FILE__, success, total);
if (success == total) return 0;
return 1;
}
int lowpan_frag_get(uint8_t *frag, size_t len,
struct ip6_packet *packet,
struct ieee154_frame_addr *frame,
struct lowpan_ctx *ctx) {
uint8_t *buf, *lowpan_buf, *ieee_buf = frag;
uint16_t extra_payload;
/* pack 802.15.4 */
buf = lowpan_buf = pack_ieee154_header(frag, len, frame);
if (ctx->offset == 0) {
int offset = 0;
#if LIB6LOWPAN_HC_VERSION == -1
/* just copy the ipv6 header around... */
*buf++ = LOWPAN_IPV6_PATTERN;
memcpy(buf, &packet->ip6_hdr, sizeof(struct ip6_hdr));
buf += sizeof(struct ip6_hdr);
#elif !defined(LIB6LOWPAN_HC_VERSION) || LIB6LOWPAN_HC_VERSION == 6
/* pack the IPv6 header */
buf = lowpan_pack_headers(packet, frame, buf, len - (buf - frag));
if (!buf) return -1;
/* pack the next headers */
offset = pack_nhc_chain(&buf, len - (buf - ieee_buf), packet);
if (offset < 0) return -2;
#endif
/* copy the rest of the payload into this fragment */
extra_payload = ntohs(packet->ip6_hdr.ip6_plen) - offset;
/* may need to fragment -- insert a FRAG1 header if so */
if (extra_payload > len - (buf - ieee_buf)) {
struct packed_lowmsg lowmsg;
memmove(lowpan_buf + LOWMSG_FRAG1_LEN,
lowpan_buf,
buf - lowpan_buf);
lowmsg.data = lowpan_buf;
lowmsg.len = LOWMSG_FRAG1_LEN;
lowmsg.headers = 0;
setupHeaders(&lowmsg, LOWMSG_FRAG1_HDR);
setFragDgramSize(&lowmsg, ntohs(packet->ip6_hdr.ip6_plen) + sizeof(struct ip6_hdr));
setFragDgramTag(&lowmsg, ctx->tag);
lowpan_buf += LOWMSG_FRAG1_LEN;
buf += LOWMSG_FRAG1_LEN;
extra_payload = len - (buf - ieee_buf);
extra_payload -= (extra_payload % 8);
}
if (iov_read(packet->ip6_data, offset, extra_payload, buf) != extra_payload) {
return -3;
}
ctx->offset = offset + extra_payload + sizeof(struct ip6_hdr);
return (buf - frag) + extra_payload;
} else {
struct packed_lowmsg lowmsg;
buf = lowpan_buf = pack_ieee154_header(frag, len, frame);
/* setup the FRAGN header */
lowmsg.data = lowpan_buf;
lowmsg.len = LOWMSG_FRAGN_LEN;
lowmsg.headers = 0;
setupHeaders(&lowmsg, LOWMSG_FRAGN_HDR);
if (setFragDgramSize(&lowmsg, ntohs(packet->ip6_hdr.ip6_plen) + sizeof(struct ip6_hdr)))
return -5;
if (setFragDgramTag(&lowmsg, ctx->tag))
return -6;
if (setFragDgramOffset(&lowmsg, ctx->offset / 8))
return -7;
buf += LOWMSG_FRAGN_LEN;
extra_payload = ntohs(packet->ip6_hdr.ip6_plen) + sizeof(struct ip6_hdr) - ctx->offset;
if (extra_payload > len - (buf - ieee_buf)) {
extra_payload = len - (buf - ieee_buf);
extra_payload -= (extra_payload % 8);
}
if (iov_read(packet->ip6_data, ctx->offset - sizeof(struct ip6_hdr), extra_payload, buf) != extra_payload) {
return -4;
}
ctx->offset += extra_payload;
if (extra_payload == 0) return 0;
else return (lowpan_buf - ieee_buf) + LOWMSG_FRAGN_LEN + extra_payload;
}
}