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implemented NAT detection for IPv6

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This commit is contained in:
Martin Willi
2006-08-31 06:17:41 +00:00
parent 1f7fd2ced8
commit 053842f4e7
1 changed files with 17 additions and 34 deletions
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src/charon/sa/transactions/ike_sa_init.c
+17 -34
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@@ -200,47 +200,30 @@ static u_int32_t requested(private_ike_sa_init_t *this)
static chunk_t generate_natd_hash(private_ike_sa_init_t *this,
ike_sa_id_t * ike_sa_id, host_t *host)
{
chunk_t natd_string;
chunk_t natd_chunk, spi_i_chunk, spi_r_chunk, addr_chunk, port_chunk;
chunk_t natd_hash;
u_int8_t *p;
u_int64_t spi_i, spi_r;
char buf[512];
u_int16_t port;
/* prepare all requred chunks */
spi_i = ike_sa_id->get_initiator_spi(ike_sa_id);
spi_r = ike_sa_id->get_responder_spi(ike_sa_id);
spi_i_chunk.ptr = (void*)&spi_i;
spi_i_chunk.len = sizeof(spi_i);
spi_r_chunk.ptr = (void*)&spi_r;
spi_r_chunk.len = sizeof(spi_r);
port = host->get_port(host);
port_chunk.ptr = (void*)&port;
port_chunk.len = sizeof(port);
addr_chunk = host->get_address(host);
switch (host->get_family(host))
{
case AF_INET:
{
struct sockaddr_in* sai;
natd_string = chunk_alloc(sizeof(spi_i) + sizeof(spi_r) +
sizeof(sai->sin_addr.s_addr) +
sizeof(sai->sin_port));
sai = (struct sockaddr_in*)host->get_sockaddr(host);
p = natd_string.ptr;
*(u_int64_t*)p = spi_i; p += sizeof(spi_i);
*(u_int64_t*)p = spi_r; p += sizeof(spi_r);
*(u_int32_t*)p = sai->sin_addr.s_addr; p += sizeof(sai->sin_addr.s_addr);
*(u_int16_t*)p = sai->sin_port; p += sizeof(sai->sin_port);
break;
}
case AF_INET6:
default:
/* TODO: Add IPv6 support */
natd_string = CHUNK_INITIALIZER;
}
/* natd_hash = SHA1( spi_i | spi_r | address | port ) */
natd_chunk = chunk_cat("cccc", spi_i_chunk, spi_r_chunk, addr_chunk, port_chunk);
this->nat_hasher->allocate_hash(this->nat_hasher, natd_chunk, &natd_hash);
this->logger->log_chunk(this->logger, RAW, "natd_chunk", natd_chunk);
this->logger->log_chunk(this->logger, RAW, "natd_hash", natd_hash);
this->nat_hasher->allocate_hash(this->nat_hasher, natd_string, &natd_hash);
sprintf(buf, "natd_hash(%016llx %016llx %s:%d) == SHA1(", spi_i, spi_r,
host->get_string(host), host->get_port(host));
chunk_to_hex(buf + strlen(buf), sizeof(buf) - strlen(buf), natd_string);
strcat(buf, ") == ");
chunk_to_hex(buf + strlen(buf), sizeof(buf) - strlen(buf), natd_hash);
this->logger->log(this->logger, CONTROL|LEVEL3, buf);
chunk_free(&natd_string);
chunk_free(&natd_chunk);
return natd_hash;
}