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passt, pasta: Introduce command-line options and port re-mapping

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Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
This commit is contained in:
Stefano Brivio
2021-08-12 15:42:43 +02:00
parent 1b1b27c06a
commit 1e49d194d0
17 changed files with 1657 additions and 704 deletions
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14
ndp.c
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@@ -64,6 +64,9 @@ int ndp(struct ctx *c, struct ethhdr *eh, size_t len)
ih->icmp6_type < RS || ih->icmp6_type > NA)
return 0;
if (c->no_ndp)
return 1;
ehr = (struct ethhdr *)buf;
ip6hr = (struct ipv6hdr *)(ehr + 1);
ihr = (struct icmp6hdr *)(ip6hr + 1);
@@ -91,6 +94,9 @@ int ndp(struct ctx *c, struct ethhdr *eh, size_t len)
size_t len = 0;
int i, n;
if (c->no_ra)
return 1;
info("NDP: received RS, sending RA");
ihr->icmp6_type = RA;
ihr->icmp6_code = 0;
@@ -110,6 +116,14 @@ int ndp(struct ctx *c, struct ethhdr *eh, size_t len)
memcpy(p, &c->addr6, 8); /* prefix */
p += 16;
if (c->mtu) {
*p++ = 5; /* type */
*p++ = 1; /* length */
p += 2; /* reserved */
*(uint32_t *)p = htonl(c->mtu); /* MTU */
p += 4;
}
for (n = 0; !IN6_IS_ADDR_UNSPECIFIED(&c->dns6[n]); n++);
if (n) {
*p++ = 25; /* RDNSS */