static int acpt_state(BIO *b, BIO_ACCEPT *c)
{
BIO *bio = NULL, *dbio;
int s = -1;
int i;
again:
switch (c->state) {
case ACPT_S_BEFORE:
if (c->param_addr == NULL) {
BIOerr(BIO_F_ACPT_STATE, BIO_R_NO_ACCEPT_PORT_SPECIFIED);
return (-1);
}
s = BIO_get_accept_socket(c->param_addr, c->bind_mode);
if (s == INVALID_SOCKET)
return (-1);
if (c->accept_nbio) {
if (!BIO_socket_nbio(s, 1)) {
closesocket(s);
BIOerr(BIO_F_ACPT_STATE,
BIO_R_ERROR_SETTING_NBIO_ON_ACCEPT_SOCKET);
return (-1);
}
}
c->accept_sock = s;
b->num = s;
c->state = ACPT_S_GET_ACCEPT_SOCKET;
return (1);
/* break; */
case ACPT_S_GET_ACCEPT_SOCKET:
if (b->next_bio != NULL) {
c->state = ACPT_S_OK;
goto again;
}
BIO_clear_retry_flags(b);
b->retry_reason = 0;
i = BIO_accept(c->accept_sock, &(c->addr));
/* -2 return means we should retry */
if (i == -2) {
BIO_set_retry_special(b);
b->retry_reason = BIO_RR_ACCEPT;
return -1;
}
if (i < 0)
return (i);
bio = BIO_new_socket(i, BIO_CLOSE);
if (bio == NULL)
goto err;
BIO_set_callback(bio, BIO_get_callback(b));
BIO_set_callback_arg(bio, BIO_get_callback_arg(b));
if (c->nbio) {
if (!BIO_socket_nbio(i, 1)) {
BIOerr(BIO_F_ACPT_STATE,
BIO_R_ERROR_SETTING_NBIO_ON_ACCEPTED_SOCKET);
goto err;
}
}
/*
* 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 err;
if (!BIO_push(dbio, bio))
goto err;
bio = dbio;
}
if (BIO_push(b, bio) == NULL)
goto err;
c->state = ACPT_S_OK;
return (1);
err:
if (bio != NULL)
BIO_free(bio);
else if (s >= 0)
closesocket(s);
return (0);
/* break; */
case ACPT_S_OK:
if (b->next_bio == NULL) {
c->state = ACPT_S_GET_ACCEPT_SOCKET;
goto again;
}
return (1);
/* break; */
default:
return (0);
/* break; */
}
}
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;
}