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Move ICMP parsing code in src/ip.h

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Signed-off-by: Adrien Gallouët <adrien@gallouet.fr>
This commit is contained in:
Adrien Gallouët
2017-12-17 16:03:00 +00:00
parent 8f35528fde
commit 3b787a2043
2 changed files with 44 additions and 13 deletions
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17
src/main.c
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@@ -411,17 +411,12 @@ main(int argc, char **argv)
socklen_t sl = sizeof(ss);
ssize_t r = recvfrom(icmp_fd, gt.buf.data, gt.buf.size, 0,
(struct sockaddr *)&ss, &sl);
if (r >= 8) {
struct ip_common ic;
if (!ip_get_common(&ic, gt.buf.data, r) && ic.proto == 1) {
unsigned char *data = &gt.buf.data[ic.hdr_size];
if (data[0] == 3) {
int mtu = (data[6] << 8) | data[7];
if (mtu) {
gt_log("received MTU from ICMP: %i\n", mtu);
mud_set_mtu(mud, GT_MTU(mtu));
}
}
struct ip_common ic;
if (!ip_get_common(&ic, gt.buf.data, r)) {
int mtu = ip_get_mtu(&ic, gt.buf.data, r);
if (mtu > 0) {
gt_log("received MTU from ICMP: %i\n", mtu);
mud_set_mtu(mud, GT_MTU(mtu));
}
}
}