/** Free http client state and deallocate all resources within */
static err_t
httpc_free_state(httpc_state_t* req)
{
struct altcp_pcb* tpcb;
if (req->request != NULL) {
pbuf_free(req->request);
req->request = NULL;
}
if (req->rx_hdrs != NULL) {
pbuf_free(req->rx_hdrs);
req->rx_hdrs = NULL;
}
tpcb = req->pcb;
mem_free(req);
req = NULL;
if (tpcb != NULL) {
err_t r;
altcp_arg(tpcb, NULL);
altcp_recv(tpcb, NULL);
altcp_err(tpcb, NULL);
altcp_poll(tpcb, NULL, 0);
altcp_sent(tpcb, NULL);
r = altcp_close(tpcb);
if (r != ERR_OK) {
altcp_abort(tpcb);
return ERR_ABRT;
}
}
return ERR_OK;
}
static void
altcp_mbedtls_remove_callbacks(struct altcp_pcb *inner_conn)
{
altcp_arg(inner_conn, NULL);
altcp_recv(inner_conn, NULL);
altcp_sent(inner_conn, NULL);
altcp_err(inner_conn, NULL);
altcp_poll(inner_conn, NULL, inner_conn->pollinterval);
}
static void
altcp_mbedtls_setup_callbacks(struct altcp_pcb *conn, struct altcp_pcb *inner_conn)
{
altcp_arg(inner_conn, conn);
altcp_recv(inner_conn, altcp_mbedtls_lower_recv);
altcp_sent(inner_conn, altcp_mbedtls_lower_sent);
altcp_err(inner_conn, altcp_mbedtls_lower_err);
/* tcp_poll is set when interval is set by application */
/* listen is set totally different :-) */
}
static struct altcp_pcb*
smtp_setup_pcb(struct smtp_session *s, const ip_addr_t* remote_ip)
{
struct altcp_pcb* pcb;
LWIP_UNUSED_ARG(remote_ip);
#if LWIP_ALTCP && LWIP_ALTCP_TLS
if (smtp_server_tls_config) {
pcb = altcp_tls_new(smtp_server_tls_config, IP_GET_TYPE(remote_ip));
} else
#endif
{
pcb = altcp_tcp_new_ip_type(IP_GET_TYPE(remote_ip));
}
if (pcb != NULL) {
altcp_arg(pcb, s);
altcp_recv(pcb, smtp_tcp_recv);
altcp_err(pcb, smtp_tcp_err);
altcp_poll(pcb, smtp_tcp_poll, SMTP_POLL_INTERVAL);
altcp_sent(pcb, smtp_tcp_sent);
}
return pcb;
}
/** Initialize the connection struct */
static err_t
httpc_init_connection_common(httpc_state_t **connection, const httpc_connection_t *settings, const char* server_name,
u16_t server_port, const char* uri, altcp_recv_fn recv_fn, void* callback_arg, int use_host)
{
size_t alloc_len;
mem_size_t mem_alloc_len;
int req_len, req_len2;
httpc_state_t *req;
#if HTTPC_DEBUG_REQUEST
size_t server_name_len, uri_len;
#endif
LWIP_ASSERT("uri != NULL", uri != NULL);
/* get request len */
req_len = httpc_create_request_string(settings, server_name, server_port, uri, use_host, NULL, 0);
if ((req_len < 0) || (req_len > 0xFFFF)) {
return ERR_VAL;
}
/* alloc state and request in one block */
alloc_len = sizeof(httpc_state_t);
#if HTTPC_DEBUG_REQUEST
server_name_len = server_name ? strlen(server_name) : 0;
uri_len = strlen(uri);
alloc_len += server_name_len + 1 + uri_len + 1;
#endif
mem_alloc_len = (mem_size_t)alloc_len;
if ((mem_alloc_len < alloc_len) || (req_len + 1 > 0xFFFF)) {
return ERR_VAL;
}
req = (httpc_state_t*)mem_malloc((mem_size_t)alloc_len);
if(req == NULL) {
return ERR_MEM;
}
memset(req, 0, sizeof(httpc_state_t));
req->timeout_ticks = HTTPC_POLL_TIMEOUT;
req->request = pbuf_alloc(PBUF_RAW, (u16_t)(req_len + 1), PBUF_RAM);
if (req->request == NULL) {
httpc_free_state(req);
return ERR_MEM;
}
if (req->request->next != NULL) {
/* need a pbuf in one piece */
httpc_free_state(req);
return ERR_MEM;
}
req->hdr_content_len = HTTPC_CONTENT_LEN_INVALID;
#if HTTPC_DEBUG_REQUEST
req->server_name = (char*)(req + 1);
if (server_name) {
memcpy(req->server_name, server_name, server_name_len + 1);
}
req->uri = req->server_name + server_name_len + 1;
memcpy(req->uri, uri, uri_len + 1);
#endif
req->pcb = altcp_new(settings->altcp_allocator);
if(req->pcb == NULL) {
httpc_free_state(req);
return ERR_MEM;
}
req->remote_port = settings->use_proxy ? settings->proxy_port : server_port;
altcp_arg(req->pcb, req);
altcp_recv(req->pcb, httpc_tcp_recv);
altcp_err(req->pcb, httpc_tcp_err);
altcp_poll(req->pcb, httpc_tcp_poll, HTTPC_POLL_INTERVAL);
altcp_sent(req->pcb, httpc_tcp_sent);
/* set up request buffer */
req_len2 = httpc_create_request_string(settings, server_name, server_port, uri, use_host,
(char *)req->request->payload, req_len + 1);
if (req_len2 != req_len) {
httpc_free_state(req);
return ERR_VAL;
}
req->recv_fn = recv_fn;
req->conn_settings = settings;
req->callback_arg = callback_arg;
*connection = req;
return ERR_OK;
}