From e49abcede093ded4d11de88a6d0c25f003c9771e Mon Sep 17 00:00:00 2001 From: Tobias Brunner Date: Fri, 24 Feb 2012 11:07:34 +0100 Subject: Let kernel interfaces decide how to enable UDP decapsulation of ESP packets. --- .../plugins/kernel_pfkey/kernel_pfkey_ipsec.c | 42 ++++++++++++++++++++++ 1 file changed, 42 insertions(+) (limited to 'src/libhydra/plugins/kernel_pfkey/kernel_pfkey_ipsec.c') diff --git a/src/libhydra/plugins/kernel_pfkey/kernel_pfkey_ipsec.c b/src/libhydra/plugins/kernel_pfkey/kernel_pfkey_ipsec.c index dfe10f93f..13422670a 100644 --- a/src/libhydra/plugins/kernel_pfkey/kernel_pfkey_ipsec.c +++ b/src/libhydra/plugins/kernel_pfkey/kernel_pfkey_ipsec.c @@ -51,6 +51,9 @@ #include #include #include +#ifdef __APPLE__ +#include +#endif #include "kernel_pfkey_ipsec.h" @@ -99,6 +102,20 @@ #define IPV6_IPSEC_POLICY 34 #endif +/* from linux/udp.h */ +#ifndef UDP_ENCAP +#define UDP_ENCAP 100 +#endif + +#ifndef UDP_ENCAP_ESPINUDP +#define UDP_ENCAP_ESPINUDP 2 +#endif + +/* this is not defined on some platforms */ +#ifndef SOL_UDP +#define SOL_UDP IPPROTO_UDP +#endif + /** default priority of installed policies */ #define PRIO_BASE 512 @@ -2488,6 +2505,30 @@ METHOD(kernel_ipsec_t, bypass_socket, bool, return TRUE; } +METHOD(kernel_ipsec_t, enable_udp_decap, bool, + private_kernel_pfkey_ipsec_t *this, int fd, int family, u_int16_t port) +{ +#ifndef __APPLE__ + int type = UDP_ENCAP_ESPINUDP; + + if (setsockopt(fd, SOL_UDP, UDP_ENCAP, &type, sizeof(type)) < 0) + { + DBG1(DBG_KNL, "unable to set UDP_ENCAP: %s", strerror(errno)); + return FALSE; + } +#else /* __APPLE__ */ + if (sysctlbyname("net.inet.ipsec.esp_port", NULL, NULL, &port, + sizeof(port)) != 0) + { + DBG1(DBG_KNL, "could not set net.inet.ipsec.esp_port to %d: %s", + port, strerror(errno)); + return FALSE; + } +#endif /* __APPLE__ */ + + return TRUE; +} + METHOD(kernel_ipsec_t, destroy, void, private_kernel_pfkey_ipsec_t *this) { @@ -2532,6 +2573,7 @@ kernel_pfkey_ipsec_t *kernel_pfkey_ipsec_create() .del_policy = _del_policy, .flush_policies = _flush_policies, .bypass_socket = _bypass_socket, + .enable_udp_decap = _enable_udp_decap, .destroy = _destroy, }, }, -- cgit v1.2.3