csp_socket_t * csp_socket(uint32_t opts) {
/* Validate socket options */
#ifndef CSP_USE_RDP
if (opts & CSP_SO_RDPREQ) {
csp_log_error("Attempt to create socket that requires RDP, but CSP was compiled without RDP support\r\n");
return NULL;
}
#endif
#ifndef CSP_USE_XTEA
if (opts & CSP_SO_XTEAREQ) {
csp_log_error("Attempt to create socket that requires XTEA, but CSP was compiled without XTEA support\r\n");
return NULL;
}
#endif
#ifndef CSP_USE_HMAC
if (opts & CSP_SO_HMACREQ) {
csp_log_error("Attempt to create socket that requires HMAC, but CSP was compiled without HMAC support\r\n");
return NULL;
}
#endif
#ifndef CSP_USE_CRC32
if (opts & CSP_SO_CRC32REQ) {
csp_log_error("Attempt to create socket that requires CRC32, but CSP was compiled without CRC32 support\r\n");
return NULL;
}
#endif
/* Drop packet if reserved flags are set */
if (opts & ~(CSP_SO_RDPREQ | CSP_SO_XTEAREQ | CSP_SO_HMACREQ | CSP_SO_CRC32REQ | CSP_SO_CONN_LESS)) {
csp_log_error("Invalid socket option\r\n");
return NULL;
}
/* Use CSP buffers instead? */
csp_socket_t * sock = csp_conn_allocate(CONN_SERVER);
if (sock == NULL)
return NULL;
/* If connectionless, init the queue to a pre-defined size
* if not, the user must init the queue using csp_listen */
if (opts & CSP_SO_CONN_LESS) {
sock->socket = csp_queue_create(CSP_CONN_QUEUE_LENGTH, sizeof(csp_packet_t *));
if (sock->socket == NULL)
return NULL;
} else {
sock->socket = NULL;
}
sock->opts = opts;
return sock;
}
csp_conn_t * csp_conn_new(csp_id_t idin, csp_id_t idout) {
/* Allocate connection structure */
csp_conn_t * conn = csp_conn_allocate(CONN_CLIENT);
if (conn) {
/* No lock is needed here, because nobody else *
* has a reference to this connection yet. */
conn->idin.ext = idin.ext;
conn->idout.ext = idout.ext;
conn->timestamp = csp_get_ms();
/* Ensure connection queue is empty */
csp_conn_flush_rx_queue(conn);
}
return conn;
}