From 875179fa60ffe2eba1daaefb0af1be97ff5eda6a Mon Sep 17 00:00:00 2001 From: Paul Moore Date: Sat, 1 Dec 2007 23:27:18 +1100 Subject: [PATCH] [IPSEC]: SPD auditing fix to include the netmask/prefix-length Currently the netmask/prefix-length of an IPsec SPD entry is not included in any of the SPD related audit messages. This can cause a problem when the audit log is examined as the netmask/prefix-length is vital in determining what network traffic is affected by a particular SPD entry. This patch fixes this problem by adding two additional fields, "src_prefixlen" and "dst_prefixlen", to the SPD audit messages to indicate the source and destination netmasks. These new fields are only included in the audit message when the netmask/prefix-length is less than the address length, i.e. the SPD entry applies to a network address and not a host address. Example audit message: type=UNKNOWN[1415] msg=audit(1196105849.752:25): auid=0 \ subj=root:system_r:unconfined_t:s0-s0:c0.c1023 op=SPD-add res=1 \ src=192.168.0.0 src_prefixlen=24 dst=192.168.1.0 dst_prefixlen=24 In addition, this patch also fixes a few other things in the xfrm_audit_common_policyinfo() function. The IPv4 string formatting was converted to use the standard NIPQUAD_FMT constant, the memcpy() was removed from the IPv6 code path and replaced with a typecast (the memcpy() was acting as a slow, implicit typecast anyway), and two local variables were created to make referencing the XFRM security context and selector information cleaner. Signed-off-by: Paul Moore Signed-off-by: Herbert Xu Signed-off-by: David S. Miller --- net/xfrm/xfrm_policy.c | 44 +++++++++++++++++++++++++----------------- 1 file changed, 26 insertions(+), 18 deletions(-) diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c index b153f7482052..a76280a14e72 100644 --- a/net/xfrm/xfrm_policy.c +++ b/net/xfrm/xfrm_policy.c @@ -2266,29 +2266,37 @@ void __init xfrm_init(void) static inline void xfrm_audit_common_policyinfo(struct xfrm_policy *xp, struct audit_buffer *audit_buf) { - if (xp->security) + struct xfrm_sec_ctx *ctx = xp->security; + struct xfrm_selector *sel = &xp->selector; + + if (ctx) audit_log_format(audit_buf, " sec_alg=%u sec_doi=%u sec_obj=%s", - xp->security->ctx_alg, xp->security->ctx_doi, - xp->security->ctx_str); + ctx->ctx_alg, ctx->ctx_doi, ctx->ctx_str); - switch(xp->selector.family) { + switch(sel->family) { case AF_INET: - audit_log_format(audit_buf, " src=%u.%u.%u.%u dst=%u.%u.%u.%u", - NIPQUAD(xp->selector.saddr.a4), - NIPQUAD(xp->selector.daddr.a4)); + audit_log_format(audit_buf, " src=" NIPQUAD_FMT, + NIPQUAD(sel->saddr.a4)); + if (sel->prefixlen_s != 32) + audit_log_format(audit_buf, " src_prefixlen=%d", + sel->prefixlen_s); + audit_log_format(audit_buf, " dst=" NIPQUAD_FMT, + NIPQUAD(sel->daddr.a4)); + if (sel->prefixlen_d != 32) + audit_log_format(audit_buf, " dst_prefixlen=%d", + sel->prefixlen_d); break; case AF_INET6: - { - struct in6_addr saddr6, daddr6; - - memcpy(&saddr6, xp->selector.saddr.a6, - sizeof(struct in6_addr)); - memcpy(&daddr6, xp->selector.daddr.a6, - sizeof(struct in6_addr)); - audit_log_format(audit_buf, - " src=" NIP6_FMT " dst=" NIP6_FMT, - NIP6(saddr6), NIP6(daddr6)); - } + audit_log_format(audit_buf, " src=" NIP6_FMT, + NIP6(*(struct in6_addr *)sel->saddr.a6)); + if (sel->prefixlen_s != 128) + audit_log_format(audit_buf, " src_prefixlen=%d", + sel->prefixlen_s); + audit_log_format(audit_buf, " dst=" NIP6_FMT, + NIP6(*(struct in6_addr *)sel->daddr.a6)); + if (sel->prefixlen_d != 128) + audit_log_format(audit_buf, " dst_prefixlen=%d", + sel->prefixlen_d); break; } } -- GitLab