extmod/modlwip: Add ability to run callback on "recv" and "accept" events.
To use: .setsockopt(SOL_SOCKET, 20, lambda sock: print(sock)). There's a single underlying callback slot. For normal sockets, it serves as data received callback, for listening sockets - connection arrived callback.
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@ -234,6 +234,7 @@ typedef struct _lwip_socket_obj_t {
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struct pbuf *pbuf;
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struct tcp_pcb *connection;
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} incoming;
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mp_obj_t callback;
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byte peer[4];
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mp_uint_t peer_port;
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mp_uint_t timeout;
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@ -261,6 +262,12 @@ static inline void poll_sockets(void) {
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/*******************************************************************************/
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// Callback functions for the lwIP raw API.
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static inline void exec_user_callback(lwip_socket_obj_t *socket) {
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if (socket->callback != MP_OBJ_NULL) {
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mp_call_function_1(socket->callback, socket);
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}
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}
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// Callback for incoming UDP packets. We simply stash the packet and the source address,
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// in case we need it for recvfrom.
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STATIC void _lwip_udp_incoming(void *arg, struct udp_pcb *upcb, struct pbuf *p, ip_addr_t *addr, u16_t port) {
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@ -315,6 +322,7 @@ STATIC err_t _lwip_tcp_accept(void *arg, struct tcp_pcb *newpcb, err_t err) {
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return ERR_BUF;
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} else {
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socket->incoming.connection = newpcb;
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exec_user_callback(socket);
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return ERR_OK;
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}
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}
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@ -327,12 +335,16 @@ STATIC err_t _lwip_tcp_recv(void *arg, struct tcp_pcb *tcpb, struct pbuf *p, err
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// Other side has closed connection.
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DEBUG_printf("_lwip_tcp_recv[%p]: other side closed connection\n", socket);
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socket->state = STATE_PEER_CLOSED;
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exec_user_callback(socket);
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return ERR_OK;
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} else if (socket->incoming.pbuf != NULL) {
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// No room in the inn, let LWIP know it's still responsible for delivery later
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return ERR_BUF;
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}
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socket->incoming.pbuf = p;
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exec_user_callback(socket);
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return ERR_OK;
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}
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@ -542,6 +554,7 @@ STATIC mp_obj_t lwip_socket_make_new(const mp_obj_type_t *type, mp_uint_t n_args
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socket->base.type = (mp_obj_t)&lwip_socket_type;
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socket->domain = MOD_NETWORK_AF_INET;
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socket->type = MOD_NETWORK_SOCK_STREAM;
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socket->callback = MP_OBJ_NULL;
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if (n_args >= 1) {
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socket->domain = mp_obj_get_int(args[0]);
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if (n_args >= 2) {
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@ -717,6 +730,7 @@ STATIC mp_obj_t lwip_socket_accept(mp_obj_t self_in) {
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socket2->timeout = socket->timeout;
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socket2->state = STATE_CONNECTED;
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socket2->leftover_count = 0;
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socket2->callback = MP_OBJ_NULL;
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tcp_arg(socket2->pcb.tcp, (void*)socket2);
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tcp_err(socket2->pcb.tcp, _lwip_tcp_error);
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tcp_recv(socket2->pcb.tcp, _lwip_tcp_recv);
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@ -978,8 +992,20 @@ STATIC MP_DEFINE_CONST_FUN_OBJ_2(lwip_socket_setblocking_obj, lwip_socket_setblo
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STATIC mp_obj_t lwip_socket_setsockopt(mp_uint_t n_args, const mp_obj_t *args) {
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(void)n_args; // always 4
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lwip_socket_obj_t *socket = args[0];
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int opt = mp_obj_get_int(args[2]);
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if (opt == 20) {
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if (args[3] == mp_const_none) {
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socket->callback = MP_OBJ_NULL;
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} else {
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socket->callback = args[3];
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}
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return mp_const_none;
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}
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// Integer options
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mp_int_t val = mp_obj_get_int(args[3]);
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switch (mp_obj_get_int(args[2])) {
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switch (opt) {
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case SOF_REUSEADDR:
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// Options are common for UDP and TCP pcb's.
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if (val) {
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