git: 89f6723288b0 - main - pf: invert direction for inner icmp state lookups
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Date: Wed, 14 Aug 2024 13:50:24 UTC
The branch main has been updated by kp: URL: https://cgit.FreeBSD.org/src/commit/?id=89f6723288b0d27d3f14f93e6e83f672fa2b8aca commit 89f6723288b0d27d3f14f93e6e83f672fa2b8aca Author: Kristof Provost <kp@FreeBSD.org> AuthorDate: 2024-08-14 09:29:30 +0000 Commit: Kristof Provost <kp@FreeBSD.org> CommitDate: 2024-08-14 12:15:07 +0000 pf: invert direction for inner icmp state lookups (e.g. traceroute with icmp) ok henning, jsing Also extend the test case to cover this scenario. PR: 280701 Obtained from: OpenBSD MFC after: 1 week Sponsored by: Rubicon Communications, LLC ("Netgate") --- sys/netpfil/pf/pf.c | 21 +++++++++++---------- tests/sys/netpfil/pf/icmp.sh | 4 +++- tests/sys/netpfil/pf/icmp6.sh | 4 +++- 3 files changed, 17 insertions(+), 12 deletions(-) diff --git a/sys/netpfil/pf/pf.c b/sys/netpfil/pf/pf.c index a2b152cebc77..0547e29e04c2 100644 --- a/sys/netpfil/pf/pf.c +++ b/sys/netpfil/pf/pf.c @@ -348,7 +348,7 @@ static int pf_test_state_udp(struct pf_kstate **, int pf_icmp_state_lookup(struct pf_state_key_cmp *, struct pf_pdesc *, struct pf_kstate **, struct mbuf *, int, struct pfi_kkif *, u_int16_t, u_int16_t, - int, int *, int); + int, int *, int, int); static int pf_test_state_icmp(struct pf_kstate **, struct pfi_kkif *, struct mbuf *, int, void *, struct pf_pdesc *, u_short *); @@ -6639,7 +6639,8 @@ pf_multihome_scan_asconf(struct mbuf *m, int start, int len, int pf_icmp_state_lookup(struct pf_state_key_cmp *key, struct pf_pdesc *pd, struct pf_kstate **state, struct mbuf *m, int direction, struct pfi_kkif *kif, - u_int16_t icmpid, u_int16_t type, int icmp_dir, int *iidx, int multi) + u_int16_t icmpid, u_int16_t type, int icmp_dir, int *iidx, int multi, + int inner) { key->af = pd->af; key->proto = pd->proto; @@ -6676,7 +6677,8 @@ pf_icmp_state_lookup(struct pf_state_key_cmp *key, struct pf_pdesc *pd, /* Is this ICMP message flowing in right direction? */ if ((*state)->rule.ptr->type && - (((*state)->direction == direction) ? + (((!inner && (*state)->direction == direction) || + (inner && (*state)->direction != direction)) ? PF_IN : PF_OUT) != icmp_dir) { if (V_pf_status.debug >= PF_DEBUG_MISC) { printf("pf: icmp type %d in wrong direction (%d): ", @@ -6734,7 +6736,7 @@ pf_test_state_icmp(struct pf_kstate **state, struct pfi_kkif *kif, */ ret = pf_icmp_state_lookup(&key, pd, state, m, pd->dir, kif, virtual_id, virtual_type, icmp_dir, &iidx, - PF_ICMP_MULTI_NONE); + PF_ICMP_MULTI_NONE, 0); if (ret >= 0) { if (ret == PF_DROP && pd->af == AF_INET6 && icmp_dir == PF_OUT) { @@ -6742,7 +6744,7 @@ pf_test_state_icmp(struct pf_kstate **state, struct pfi_kkif *kif, PF_STATE_UNLOCK((*state)); ret = pf_icmp_state_lookup(&key, pd, state, m, pd->dir, kif, virtual_id, virtual_type, - icmp_dir, &iidx, multi); + icmp_dir, &iidx, multi, 0); if (ret >= 0) return (ret); } else @@ -6826,6 +6828,7 @@ pf_test_state_icmp(struct pf_kstate **state, struct pfi_kkif *kif, int off2 = 0; pd2.af = pd->af; + pd2.dir = pd->dir; /* Payload packet is from the opposite direction. */ pd2.sidx = (pd->dir == PF_IN) ? 1 : 0; pd2.didx = (pd->dir == PF_IN) ? 0 : 1; @@ -7147,10 +7150,9 @@ pf_test_state_icmp(struct pf_kstate **state, struct pfi_kkif *kif, pf_icmp_mapping(&pd2, iih->icmp_type, &icmp_dir, &multi, &virtual_id, &virtual_type); - pd2.dir = icmp_dir; ret = pf_icmp_state_lookup(&key, &pd2, state, m, pd2.dir, kif, virtual_id, virtual_type, - icmp_dir, &iidx, PF_ICMP_MULTI_NONE); + icmp_dir, &iidx, PF_ICMP_MULTI_NONE, 1); if (ret >= 0) return (ret); @@ -7203,10 +7205,9 @@ pf_test_state_icmp(struct pf_kstate **state, struct pfi_kkif *kif, pf_icmp_mapping(&pd2, iih->icmp6_type, &icmp_dir, &multi, &virtual_id, &virtual_type); - pd2.dir = icmp_dir; ret = pf_icmp_state_lookup(&key, &pd2, state, m, pd->dir, kif, virtual_id, virtual_type, - icmp_dir, &iidx, PF_ICMP_MULTI_NONE); + icmp_dir, &iidx, PF_ICMP_MULTI_NONE, 1); if (ret >= 0) { if (ret == PF_DROP && pd->af == AF_INET6 && icmp_dir == PF_OUT) { @@ -7215,7 +7216,7 @@ pf_test_state_icmp(struct pf_kstate **state, struct pfi_kkif *kif, ret = pf_icmp_state_lookup(&key, pd, state, m, pd->dir, kif, virtual_id, virtual_type, - icmp_dir, &iidx, multi); + icmp_dir, &iidx, multi, 1); if (ret >= 0) return (ret); } else diff --git a/tests/sys/netpfil/pf/icmp.sh b/tests/sys/netpfil/pf/icmp.sh index 16c4123b8dfe..f4c8ec5e5836 100644 --- a/tests/sys/netpfil/pf/icmp.sh +++ b/tests/sys/netpfil/pf/icmp.sh @@ -108,7 +108,9 @@ ttl_exceeded_body() jexec nat pfctl -e pft_set_rules nat \ "nat on ${epair_int}b from 198.51.100.0/24 -> (${epair_int}b)" \ - "pass" + "block" \ + "pass inet proto udp" \ + "pass inet proto icmp icmp-type { echoreq }" # Sanity checks atf_check -s exit:0 -o ignore \ diff --git a/tests/sys/netpfil/pf/icmp6.sh b/tests/sys/netpfil/pf/icmp6.sh index c54b54c20a87..b9b60a484afc 100644 --- a/tests/sys/netpfil/pf/icmp6.sh +++ b/tests/sys/netpfil/pf/icmp6.sh @@ -120,7 +120,9 @@ ttl_exceeded_body() jexec nat pfctl -e pft_set_rules nat \ "nat on ${epair_int}b from 2001:db8:3::/64 -> (${epair_int}b:0)" \ - "pass" + "block" \ + "pass inet6 proto udp" \ + "pass inet6 proto icmp6 icmp6-type { neighbrsol, neighbradv, echoreq }" # Sanity checks atf_check -s exit:0 -o ignore \