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Enabling NAT-T on Mac OS X using the private SADB_X_EXT_NATT flag and sadb_sa_2 struct.

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This commit is contained in:
Tobias Brunner
2009-07-30 14:06:26 +02:00
parent 789ba17024
commit e20bd8b6ea
1 changed files with 45 additions and 5 deletions
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src/charon/plugins/kernel_pfkey/kernel_pfkey_ipsec.c
+45 -5
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@@ -89,7 +89,7 @@
#define IP_IPSEC_POLICY 16
#endif
/* missing on uclibc */
/** missing on uclibc */
#ifndef IPV6_IPSEC_POLICY
#define IPV6_IPSEC_POLICY 34
#endif
@@ -98,6 +98,17 @@
#define PRIO_LOW 3000
#define PRIO_HIGH 2000
#ifdef __APPLE__
/** from xnu/bsd/net/pfkeyv2.h */
#define SADB_X_EXT_NATT 0x002
struct sadb_sa_2 {
struct sadb_sa sa;
u_int16_t sadb_sa_natt_port;
u_int16_t sadb_reserved0;
u_int32_t sadb_reserved1;
};
#endif
/** buffer size for PF_KEY messages */
#define PFKEY_BUFFER_SIZE 4096
@@ -1223,10 +1234,25 @@ static status_t add_sa(private_kernel_pfkey_ipsec_t *this,
msg->sadb_msg_type = inbound ? SADB_UPDATE : SADB_ADD;
msg->sadb_msg_satype = proto_ike2satype(protocol);
msg->sadb_msg_len = PFKEY_LEN(sizeof(struct sadb_msg));
sa = (struct sadb_sa*)PFKEY_EXT_ADD_NEXT(msg);
#ifdef __APPLE__
if (encap)
{
struct sadb_sa_2 *sa_2;
sa_2 = (struct sadb_sa_2*)PFKEY_EXT_ADD_NEXT(msg);
sa_2->sadb_sa_natt_port = dst->get_port(dst);
sa = &sa_2->sa;
sa->sadb_sa_flags |= SADB_X_EXT_NATT;
len = sizeof(struct sadb_sa_2);
}
else
#endif
{
sa = (struct sadb_sa*)PFKEY_EXT_ADD_NEXT(msg);
len = sizeof(struct sadb_sa);
}
sa->sadb_sa_exttype = SADB_EXT_SA;
sa->sadb_sa_len = PFKEY_LEN(sizeof(struct sadb_sa));
sa->sadb_sa_len = PFKEY_LEN(len);
sa->sadb_sa_spi = spi;
sa->sadb_sa_replay = (protocol == IPPROTO_COMP) ? 0 : 32;
sa->sadb_sa_auth = lookup_algorithm(integrity_algs, int_alg);
@@ -1403,7 +1429,21 @@ static status_t update_sa(private_kernel_pfkey_ipsec_t *this,
msg->sadb_msg_satype = proto_ike2satype(protocol);
msg->sadb_msg_len = PFKEY_LEN(sizeof(struct sadb_msg));
#ifdef __APPLE__
{
struct sadb_sa_2 *sa_2;
sa_2 = (struct sadb_sa_2*)PFKEY_EXT_ADD_NEXT(msg);
sa_2->sa.sadb_sa_len = PFKEY_LEN(sizeof(struct sadb_sa_2));
memcpy(&sa_2->sa, response.sa, sizeof(struct sadb_sa));
if (encap)
{
sa_2->sadb_sa_natt_port = new_dst->get_port(new_dst);
sa_2->sa.sadb_sa_flags |= SADB_X_EXT_NATT;
}
}
#else
PFKEY_EXT_COPY(msg, response.sa);
#endif
PFKEY_EXT_COPY(msg, response.x_sa2);
PFKEY_EXT_COPY(msg, response.src);
@@ -1421,7 +1461,7 @@ static status_t update_sa(private_kernel_pfkey_ipsec_t *this,
{
PFKEY_EXT_COPY(msg, response.key_auth);
}
#ifdef HAVE_NATT
if (new_encap)
{