int BIO_get_host_ip(const char *str, unsigned char *ip)
{
BIO_ADDRINFO *res = NULL;
int ret = 0;
if (BIO_sock_init() != 1)
return 0; /* don't generate another error code here */
if (BIO_lookup(str, NULL, BIO_LOOKUP_CLIENT, AF_INET, SOCK_STREAM, &res)) {
size_t l;
if (BIO_ADDRINFO_family(res) != AF_INET) {
BIOerr(BIO_F_BIO_GET_HOST_IP,
BIO_R_GETHOSTBYNAME_ADDR_IS_NOT_AF_INET);
} else {
BIO_ADDR_rawaddress(BIO_ADDRINFO_address(res), NULL, &l);
/* Because only AF_INET addresses will reach this far,
we can assert that l should be 4 */
OPENSSL_assert(l == 4);
BIO_ADDR_rawaddress(BIO_ADDRINFO_address(res), ip, &l);
ret = 1;
}
BIO_ADDRINFO_free(res);
} else {
ERR_add_error_data(2, "host=", str);
}
return ret;
}
int BIO_get_accept_socket(char *host, int bind_mode)
{
int s = INVALID_SOCKET;
char *h = NULL, *p = NULL;
BIO_ADDRINFO *res = NULL;
if (!BIO_parse_hostserv(host, &h, &p, BIO_PARSE_PRIO_SERV))
return INVALID_SOCKET;
if (BIO_sock_init() != 1)
return INVALID_SOCKET;
if (BIO_lookup(h, p, BIO_LOOKUP_SERVER, AF_UNSPEC, SOCK_STREAM, &res) != 0)
goto err;
if ((s = BIO_socket(BIO_ADDRINFO_family(res), BIO_ADDRINFO_socktype(res),
BIO_ADDRINFO_protocol(res), 0)) == INVALID_SOCKET) {
s = INVALID_SOCKET;
goto err;
}
if (!BIO_listen(s, BIO_ADDRINFO_address(res),
bind_mode ? BIO_SOCK_REUSEADDR : 0)) {
BIO_closesocket(s);
s = INVALID_SOCKET;
}
err:
BIO_ADDRINFO_free(res);
OPENSSL_free(h);
OPENSSL_free(p);
return s;
}
int BIO_get_port(const char *str, unsigned short *port_ptr)
{
BIO_ADDRINFO *res = NULL;
int ret = 0;
if (str == NULL) {
BIOerr(BIO_F_BIO_GET_PORT, BIO_R_NO_PORT_DEFINED);
return (0);
}
if (BIO_sock_init() != 1)
return 0; /* don't generate another error code here */
if (BIO_lookup(NULL, str, BIO_LOOKUP_CLIENT, AF_INET, SOCK_STREAM, &res)) {
if (BIO_ADDRINFO_family(res) != AF_INET) {
BIOerr(BIO_F_BIO_GET_PORT,
BIO_R_ADDRINFO_ADDR_IS_NOT_AF_INET);
} else {
*port_ptr = ntohs(BIO_ADDR_rawport(BIO_ADDRINFO_address(res)));
ret = 1;
}
BIO_ADDRINFO_free(res);
} else {
ERR_add_error_data(2, "host=", str);
}
return ret;
}
static long acpt_ctrl(BIO *b, int cmd, long num, void *ptr)
{
int *ip;
long ret = 1;
BIO_ACCEPT *data;
char **pp;
data = (BIO_ACCEPT *)b->ptr;
switch (cmd) {
case BIO_CTRL_RESET:
ret = 0;
data->state = ACPT_S_BEFORE;
acpt_close_socket(b);
BIO_ADDRINFO_free(data->addr_first);
data->addr_first = NULL;
b->flags = 0;
break;
case BIO_C_DO_STATE_MACHINE:
/* use this one to start the connection */
ret = (long)acpt_state(b, data);
break;
case BIO_C_SET_ACCEPT:
if (ptr != NULL) {
if (num == 0) {
char *hold_serv = data->param_serv;
/* We affect the hostname regardless. However, the input
* string might contain a host:service spec, so we must
* parse it, which might or might not affect the service
*/
OPENSSL_free(data->param_addr);
data->param_addr = NULL;
ret = BIO_parse_hostserv(ptr,
&data->param_addr,
&data->param_serv,
BIO_PARSE_PRIO_SERV);
if (hold_serv != data->param_serv)
OPENSSL_free(hold_serv);
b->init = 1;
} else if (num == 1) {
OPENSSL_free(data->param_serv);
data->param_serv = BUF_strdup(ptr);
b->init = 1;
} else if (num == 2) {
data->bind_mode |= BIO_SOCK_NONBLOCK;
} else if (num == 3) {
BIO_free(data->bio_chain);
data->bio_chain = (BIO *)ptr;
} else if (num == 4) {
data->accept_family = *(int *)ptr;
}
} else {
if (num == 2) {
data->bind_mode &= ~BIO_SOCK_NONBLOCK;
}
}
break;
case BIO_C_SET_NBIO:
if (num != 0)
data->accepted_mode |= BIO_SOCK_NONBLOCK;
else
data->accepted_mode &= ~BIO_SOCK_NONBLOCK;
break;
case BIO_C_SET_FD:
b->init = 1;
b->num = *((int *)ptr);
data->accept_sock = b->num;
data->state = ACPT_S_ACCEPT;
b->shutdown = (int)num;
b->init = 1;
break;
case BIO_C_GET_FD:
if (b->init) {
ip = (int *)ptr;
if (ip != NULL)
*ip = data->accept_sock;
ret = data->accept_sock;
} else
ret = -1;
break;
case BIO_C_GET_ACCEPT:
if (b->init) {
if (num == 0 && ptr != NULL) {
pp = (char **)ptr;
*pp = data->cache_accepting_name;
} else if (num == 1 && ptr != NULL) {
pp = (char **)ptr;
*pp = data->cache_accepting_serv;
} else if (num == 2 && ptr != NULL) {
pp = (char **)ptr;
*pp = data->cache_peer_name;
} else if (num == 3 && ptr != NULL) {
pp = (char **)ptr;
*pp = data->cache_peer_serv;
} else if (num == 4) {
switch (BIO_ADDRINFO_family(data->addr_iter)) {
#ifdef AF_INET6
case AF_INET6:
ret = BIO_FAMILY_IPV6;
break;
#endif
case AF_INET:
ret = BIO_FAMILY_IPV4;
break;
case 0:
ret = data->accept_family;
break;
default:
ret = -1;
break;
}
} else
ret = -1;
} else
ret = -1;
break;
case BIO_CTRL_GET_CLOSE:
ret = b->shutdown;
break;
case BIO_CTRL_SET_CLOSE:
b->shutdown = (int)num;
break;
case BIO_CTRL_PENDING:
case BIO_CTRL_WPENDING:
ret = 0;
break;
case BIO_CTRL_FLUSH:
break;
case BIO_C_SET_BIND_MODE:
data->bind_mode = (int)num;
break;
case BIO_C_GET_BIND_MODE:
ret = (long)data->bind_mode;
break;
case BIO_CTRL_DUP:
/*- dbio=(BIO *)ptr;
if (data->param_port) EAY EAY
BIO_set_port(dbio,data->param_port);
if (data->param_hostname)
BIO_set_hostname(dbio,data->param_hostname);
BIO_set_nbio(dbio,data->nbio); */
break;
default:
ret = 0;
break;
}
return (ret);
}
static int acpt_state(BIO *b, BIO_ACCEPT *c)
{
BIO *bio = NULL, *dbio;
int s = -1, ret = -1;
for (;;) {
switch (c->state) {
case ACPT_S_BEFORE:
if (c->param_addr == NULL && c->param_serv == NULL) {
BIOerr(BIO_F_ACPT_STATE, BIO_R_NO_ACCEPT_ADDR_OR_SERVICE_SPECIFIED);
ERR_add_error_data(4,
"hostname=", c->param_addr,
" service=", c->param_serv);
goto exit_loop;
}
/* Because we're starting a new bind, any cached name and serv
* are now obsolete and need to be cleaned out.
* QUESTION: should this be done in acpt_close_socket() instead?
*/
OPENSSL_free(c->cache_accepting_name);
c->cache_accepting_name = NULL;
OPENSSL_free(c->cache_accepting_serv);
c->cache_accepting_serv = NULL;
OPENSSL_free(c->cache_peer_name);
c->cache_peer_name = NULL;
OPENSSL_free(c->cache_peer_serv);
c->cache_peer_serv = NULL;
c->state = ACPT_S_GET_ADDR;
break;
case ACPT_S_GET_ADDR:
{
int family = AF_UNSPEC;
switch (c->accept_family) {
case BIO_FAMILY_IPV6:
if (1) { /* This is a trick we use to avoid bit rot.
* at least the "else" part will always be
* compiled.
*/
#ifdef AF_INET6
family = AF_INET6;
} else {
#endif
BIOerr(BIO_F_ACPT_STATE, BIO_R_UNAVAILABLE_IP_FAMILY);
goto exit_loop;
}
break;
case BIO_FAMILY_IPV4:
family = AF_INET;
break;
case BIO_FAMILY_IPANY:
family = AF_UNSPEC;
break;
default:
BIOerr(BIO_F_ACPT_STATE, BIO_R_UNSUPPORTED_IP_FAMILY);
goto exit_loop;
}
if (BIO_lookup(c->param_addr, c->param_serv, BIO_LOOKUP_SERVER,
family, SOCK_STREAM, &c->addr_first) == 0)
goto exit_loop;
}
if (c->addr_first == NULL) {
BIOerr(BIO_F_ACPT_STATE, BIO_R_LOOKUP_RETURNED_NOTHING);
goto exit_loop;
}
/* We're currently not iterating, but set this as preparation
* for possible future development in that regard
*/
c->addr_iter = c->addr_first;
c->state = ACPT_S_CREATE_SOCKET;
break;
case ACPT_S_CREATE_SOCKET:
ret = BIO_socket(BIO_ADDRINFO_family(c->addr_iter),
BIO_ADDRINFO_socktype(c->addr_iter),
BIO_ADDRINFO_protocol(c->addr_iter), 0);
if (ret == (int)INVALID_SOCKET) {
SYSerr(SYS_F_SOCKET, get_last_socket_error());
ERR_add_error_data(4,
"hostname=", c->param_addr,
" service=", c->param_serv);
BIOerr(BIO_F_ACPT_STATE, BIO_R_UNABLE_TO_CREATE_SOCKET);
goto exit_loop;
}
c->accept_sock = ret;
b->num = ret;
c->state = ACPT_S_LISTEN;
break;
case ACPT_S_LISTEN:
{
if (!BIO_listen(c->accept_sock,
BIO_ADDRINFO_address(c->addr_iter),
c->bind_mode)) {
BIO_closesocket(c->accept_sock);
goto exit_loop;
}
}
{
union BIO_sock_info_u info;
info.addr = &c->cache_accepting_addr;
if (!BIO_sock_info(c->accept_sock, BIO_SOCK_INFO_ADDRESS,
&info)) {
BIO_closesocket(c->accept_sock);
goto exit_loop;
}
}
c->cache_accepting_name =
BIO_ADDR_hostname_string(&c->cache_accepting_addr, 1);
c->cache_accepting_serv =
BIO_ADDR_service_string(&c->cache_accepting_addr, 1);
c->state = ACPT_S_ACCEPT;
s = -1;
ret = 1;
goto end;
case ACPT_S_ACCEPT:
if (b->next_bio != NULL) {
c->state = ACPT_S_OK;
break;
}
BIO_clear_retry_flags(b);
b->retry_reason = 0;
OPENSSL_free(c->cache_peer_name);
c->cache_peer_name = NULL;
OPENSSL_free(c->cache_peer_serv);
c->cache_peer_serv = NULL;
s = BIO_accept_ex(c->accept_sock, &c->cache_peer_addr,
c->accepted_mode);
/* If the returned socket is invalid, this might still be
* retryable
*/
if (s < 0) {
if (BIO_sock_should_retry(s)) {
BIO_set_retry_special(b);
b->retry_reason = BIO_RR_ACCEPT;
goto end;
}
}
/* If it wasn't retryable, we fail */
if (s < 0) {
ret = s;
goto exit_loop;
}
bio = BIO_new_socket(s, BIO_CLOSE);
if (bio == NULL)
goto exit_loop;
BIO_set_callback(bio, BIO_get_callback(b));
BIO_set_callback_arg(bio, BIO_get_callback_arg(b));
/*
* If the accept BIO has an bio_chain, we dup it and put the new
* socket at the end.
*/
if (c->bio_chain != NULL) {
if ((dbio = BIO_dup_chain(c->bio_chain)) == NULL)
goto exit_loop;
if (!BIO_push(dbio, bio))
goto exit_loop;
bio = dbio;
}
if (BIO_push(b, bio) == NULL)
goto exit_loop;
c->cache_peer_name =
BIO_ADDR_hostname_string(&c->cache_peer_addr, 1);
c->cache_peer_serv =
BIO_ADDR_service_string(&c->cache_peer_addr, 1);
c->state = ACPT_S_OK;
bio = NULL;
ret = 1;
goto end;
case ACPT_S_OK:
if (b->next_bio == NULL) {
c->state = ACPT_S_ACCEPT;
break;
}
ret = 1;
goto end;
default:
ret = 0;
goto end;
}
}
exit_loop:
if (bio != NULL)
BIO_free(bio);
else if (s >= 0)
BIO_closesocket(s);
end:
return ret;
}