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| author | Pablo Neira Ayuso <pablo@netfilter.org> | 2024-05-07 01:12:36 +0200 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2024-05-07 01:35:58 +0200 |
| commit | e4f88f7381fa551ff4ad059930a729a0ef2b405f (patch) | |
| tree | de97ead9be712fa36c7c8a11b092fce6d6d5627d | |
| parent | c6461ec97b256856e6736454f00af70d9d12f171 (diff) | |
| download | linux-e4f88f7381fa551ff4ad059930a729a0ef2b405f.tar.gz linux-e4f88f7381fa551ff4ad059930a729a0ef2b405f.tar.bz2 linux-e4f88f7381fa551ff4ad059930a729a0ef2b405f.zip | |
gtp: pass up link local traffic to userspace socket
According to TS 29.061, it is possible to see IPv6 link-local traffic in
the GTP tunnel, see 11.2.1.3.2 IPv6 Stateless Address Autoconfiguration
(IPv6 SLAAC).
Pass up these packets to the userspace daemon to handle them as control
GTP traffic.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
| -rw-r--r-- | drivers/net/gtp.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/net/gtp.c b/drivers/net/gtp.c index 8e861778c4e9..939699d6cf6f 100644 --- a/drivers/net/gtp.c +++ b/drivers/net/gtp.c @@ -251,6 +251,10 @@ static bool gtp_check_ms_ipv6(struct sk_buff *skb, struct pdp_ctx *pctx, ip6h = (struct ipv6hdr *)(skb->data + hdrlen); + if ((ipv6_addr_type(&ip6h->saddr) & IPV6_ADDR_LINKLOCAL) || + (ipv6_addr_type(&ip6h->daddr) & IPV6_ADDR_LINKLOCAL)) + return false; + if (role == GTP_ROLE_SGSN) { ret = ipv6_pdp_addr_equal(&ip6h->daddr, &pctx->ms.addr6); } else { |