Date: Wed, 23 Nov 2016 06:55:04 +0000 (UTC) From: "Andrey V. Elsukov" <ae@FreeBSD.org> To: src-committers@freebsd.org, svn-src-projects@freebsd.org Subject: svn commit: r309033 - projects/ipsec/sys/netipsec Message-ID: <201611230655.uAN6t4w7084764@repo.freebsd.org>
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Author: ae Date: Wed Nov 23 06:55:04 2016 New Revision: 309033 URL: https://svnweb.freebsd.org/changeset/base/309033 Log: Add key_setnatt() function to check NAT-T related headers. Modified: projects/ipsec/sys/netipsec/key.c Modified: projects/ipsec/sys/netipsec/key.c ============================================================================== --- projects/ipsec/sys/netipsec/key.c Wed Nov 23 06:51:19 2016 (r309032) +++ projects/ipsec/sys/netipsec/key.c Wed Nov 23 06:55:04 2016 (r309033) @@ -5037,6 +5037,74 @@ key_add(struct socket *so, struct mbuf * } } +static int +key_setnatt(struct secasvar *sav, const struct sadb_msghdr *mhp) +{ +#ifdef IPSEC_NAT_T + struct sadb_x_nat_t_port *sport, *dport; + struct sadb_x_nat_t_type *type; + + if (!SADB_CHECKHDR(mhp, SADB_X_EXT_NAT_T_TYPE) && + !SADB_CHECKHDR(mhp, SADB_X_EXT_NAT_T_SPORT) && + !SADB_CHECKHDR(mhp, SADB_X_EXT_NAT_T_DPORT)) { + if (SADB_CHECKLEN(mhp, SADB_X_EXT_NAT_T_TYPE) || + SADB_CHECKLEN(mhp, SADB_X_EXT_NAT_T_SPORT) || + SADB_CHECKLEN(mhp, SADB_X_EXT_NAT_T_DPORT)) { + ipseclog((LOG_DEBUG, + "%s: invalid message: wrong header size.\n", + __func__)); + return (EINVAL); + } + + type = (struct sadb_x_nat_t_type *) + mhp->ext[SADB_X_EXT_NAT_T_TYPE]; + sport = (struct sadb_x_nat_t_port *) + mhp->ext[SADB_X_EXT_NAT_T_SPORT]; + dport = (struct sadb_x_nat_t_port *) + mhp->ext[SADB_X_EXT_NAT_T_DPORT]; + + sav->natt_type = type->sadb_x_nat_t_type_type; + KEY_PORTTOSADDR(&sav->sah->saidx.src, + sport->sadb_x_nat_t_port_port); + KEY_PORTTOSADDR(&sav->sah->saidx.dst, + dport->sadb_x_nat_t_port_port); + } else + return (0); + if (!SADB_CHECKHDR(mhp, SADB_X_EXT_NAT_T_OAI) && + !SADB_CHECKHDR(mhp, SADB_X_EXT_NAT_T_OAR)) { + if (SADB_CHECKLEN(mhp, SADB_X_EXT_NAT_T_OAI) || + SADB_CHECKLEN(mhp, SADB_X_EXT_NAT_T_OAR)) { + ipseclog((LOG_DEBUG, + "%s: invalid message: wrong header size.\n", + __func__)); + return (EINVAL); + } + ipseclog((LOG_DEBUG, "%s: NAT-T OAi/r present\n", __func__)); + } + if (!SADB_CHECKHDR(mhp, SADB_X_EXT_NAT_T_FRAG)) { + if (SADB_CHECKLEN(mhp, SADB_X_EXT_NAT_T_FRAG)) { + ipseclog((LOG_DEBUG, + "%s: invalid message: wrong header size.\n", + __func__)); + return (EINVAL); + } + ipseclog((LOG_DEBUG, "%s: NAT-T frag present\n", __func__)); +#if 0 + struct sadb_x_nat_t_frag *frag; + frag = (struct sadb_x_nat_t_frag *) + mhp->ext[SADB_X_EXT_NAT_T_FRAG]; + /* + * In case SADB_X_EXT_NAT_T_FRAG was not given, leave it at 0. + * We should actually check for a minimum MTU here, if we + * want to support it in ip_output. + */ + sav->natt_esp_frag_len = frag->sadb_x_nat_t_frag_fraglen; +#endif + } +#endif + return (0); +} + /* m is retained */ static int key_setident(struct secashead *sah, struct mbuf *m,
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