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| author | Bartlomiej Grzesik <bag@semihalf.com> | 2021-09-24 08:17:11 +0000 |
|---|---|---|
| committer | Wojciech Macek <wma@FreeBSD.org> | 2021-09-24 08:17:11 +0000 |
| commit | 4f3376951d7024d1c3446af2260cef9e4d3404a6 (patch) | |
| tree | 12818ba2146f23facc1036b2d53806e504fcbe15 | |
| parent | f9e28f900353ca8681fa1815afaebaca16ef254b (diff) | |
| download | src-4f3376951d7024d1c3446af2260cef9e4d3404a6.tar.gz src-4f3376951d7024d1c3446af2260cef9e4d3404a6.zip | |
ipsec: Add PMTUD support for IPsec IPv4 over IPv6 tunnel
Add support for checking PMTU for IPv4 packets encapsulated in IPv6 tunnels.
Differential revision: https://reviews.freebsd.org/D31769
Sponsored by: Stormshield
Obtained from: Semihalf
| -rw-r--r-- | sys/netipsec/ipsec_output.c | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/sys/netipsec/ipsec_output.c b/sys/netipsec/ipsec_output.c index 2f8cc12c526b..50bbd72f0589 100644 --- a/sys/netipsec/ipsec_output.c +++ b/sys/netipsec/ipsec_output.c @@ -305,7 +305,6 @@ ipsec4_check_pmtu(struct mbuf *m, struct secpolicy *sp, int forwarding) uint32_t idx; int error; - /* Don't check PMTU if the frame won't have DF bit set. */ if (!V_ip4_ipsec_dfbit) return (0); @@ -335,15 +334,22 @@ setdf: } dst = &sav->sah->saidx.dst; - - /* Final header is not ipv4. */ - if (dst->sa.sa_family != AF_INET) { + memset(&inc, 0, sizeof(inc)); + switch (dst->sa.sa_family) { + case AF_INET: + inc.inc_faddr = satosin(&dst->sa)->sin_addr; + break; +#ifdef INET6 + case AF_INET6: + inc.inc6_faddr = satosin6(&dst->sa)->sin6_addr; + inc.inc_flags |= INC_ISIPV6; + break; +#endif + default: key_freesav(&sav); return (0); } - memset(&inc, 0, sizeof(inc)); - inc.inc_faddr = satosin(&dst->sa)->sin_addr; key_freesav(&sav); pmtu = tcp_hc_getmtu(&inc); /* No entry in hostcache. */ |