NanostackInterface.cpp

00001 /*
00002  * Copyright (c) 2016-2017, Arm Limited and affiliates.
00003  * SPDX-License-Identifier: Apache-2.0
00004  *
00005  * Licensed under the Apache License, Version 2.0 (the "License");
00006  * you may not use this file except in compliance with the License.
00007  * You may obtain a copy of the License at
00008  *
00009  *     http://www.apache.org/licenses/LICENSE-2.0
00010  *
00011  * Unless required by applicable law or agreed to in writing, software
00012  * distributed under the License is distributed on an "AS IS" BASIS,
00013  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00014  * See the License for the specific language governing permissions and
00015  * limitations under the License.
00016  */
00017 
00018 /* Nanostack implementation of NetworkSocketAPI */
00019 
00020 #include "mbed.h"
00021 #include "rtos.h"
00022 #include "NanostackInterface.h"
00023 #include "NanostackLockGuard.h"
00024 
00025 #include "ns_address.h"
00026 #include "nsdynmemLIB.h"
00027 #include "eventOS_scheduler.h"
00028 #include "randLIB.h"
00029 #include "ip6string.h"
00030 
00031 #include "mesh_system.h" // from inside mbed-mesh-api
00032 #include "socket_api.h"
00033 #include "net_interface.h"
00034 
00035 // Uncomment to enable trace
00036 //#define HAVE_DEBUG
00037 #include "ns_trace.h"
00038 #define TRACE_GROUP "nsif"
00039 
00040 #define NS_INTERFACE_SOCKETS_MAX  16  //same as NanoStack SOCKET_MAX
00041 
00042 #define MALLOC  ns_dyn_mem_alloc
00043 #define FREE    ns_dyn_mem_free
00044 
00045 // Socket state progressions:
00046 // UDP: UNOPENED -> DATAGRAM
00047 // TCP client: UNOPENED -> OPENED -> CONNECTING -> STREAM -> CLOSED
00048 // TCP server: UNOPENED -> OPENED -> LISTENING
00049 // TCP accept: UNOPENED -> STREAM -> CLOSED
00050 enum socket_mode_t {
00051     SOCKET_MODE_UNOPENED,   // No socket ID
00052     SOCKET_MODE_DATAGRAM,   // Socket is datagram type
00053     SOCKET_MODE_OPENED,     // Socket ID but no assigned use yet
00054     SOCKET_MODE_CONNECTING, // Socket is connecting but not open yet
00055     SOCKET_MODE_STREAM,     // Socket has an open stream
00056     SOCKET_MODE_CLOSED,     // Socket is closed and resources are freed
00057     SOCKET_MODE_LISTENING,  // Socket is listening for connections
00058 };
00059 
00060 
00061 class NanostackSocket {
00062 public:
00063     static void socket_callback(void *cb);
00064     static void* operator new(std::size_t sz);
00065     static void operator delete(void* ptr);
00066 
00067     NanostackSocket(int8_t protocol);
00068     ~NanostackSocket(void);
00069     bool open(void);
00070     int accept(NanostackSocket *accepted_socket, ns_address_t *addr);
00071     void close(void);
00072     bool closed(void) {return SOCKET_MODE_CLOSED == mode;}
00073     bool is_connecting(void);
00074     void set_connecting(ns_address_t *addr);
00075     bool is_connected(void);
00076     void set_connected(void);
00077     bool is_listening(void);
00078     void set_listening(void);
00079 
00080     // Socket events from nanostack
00081     void event_data(socket_callback_t *sock_cb);
00082     void event_connect_done(socket_callback_t *sock_cb);
00083     void event_connect_fail(socket_callback_t *sock_cb);
00084     void event_connect_closed(socket_callback_t *sock_cb);
00085     void event_connection_reset(socket_callback_t *sock_cb);
00086     void event_tx_done(socket_callback_t *sock_cb);
00087     void event_tx_fail(socket_callback_t *sock_cb);
00088     void event_incoming_connection(socket_callback_t *sock_cb);
00089 
00090     // Run callback to signal the next layer of the NSAPI
00091     void signal_event(void);
00092 
00093     void (*callback)(void *);
00094     void *callback_data;
00095     int8_t socket_id;           /*!< allocated socket ID */
00096     int8_t proto;               /*!< UDP or TCP */
00097     bool addr_valid;
00098     ns_address_t ns_address;
00099 private:
00100     bool attach(int8_t socket_id);
00101     socket_mode_t mode;
00102 };
00103 
00104 static NanostackSocket * socket_tbl[NS_INTERFACE_SOCKETS_MAX];
00105 
00106 nsapi_error_t map_mesh_error(mesh_error_t err)
00107 {
00108     switch (err) {
00109         case MESH_ERROR_NONE: return 0;
00110         case MESH_ERROR_MEMORY: return NSAPI_ERROR_NO_MEMORY ;
00111         case MESH_ERROR_PARAM: return NSAPI_ERROR_UNSUPPORTED ;
00112         case MESH_ERROR_STATE: return NSAPI_ERROR_DEVICE_ERROR ;
00113         default: return NSAPI_ERROR_DEVICE_ERROR ;
00114     }
00115 }
00116 
00117 static void convert_mbed_addr_to_ns(ns_address_t *ns_addr,
00118                              const SocketAddress *s_addr)
00119 {
00120     ns_addr->type = ADDRESS_IPV6;
00121     ns_addr->identifier = s_addr->get_port();
00122     memcpy(ns_addr->address, s_addr->get_ip_bytes(), 16);
00123 }
00124 
00125 static void convert_ns_addr_to_mbed(SocketAddress *s_addr, const ns_address_t *ns_addr)
00126 {
00127     s_addr->set_port(ns_addr->identifier);
00128     s_addr->set_ip_bytes(ns_addr->address, NSAPI_IPv6 );
00129 }
00130 
00131 static int8_t find_interface_by_address(const uint8_t target_addr[16])
00132 {
00133     for (int if_id = 1; if_id <= 127; if_id++) {
00134         int i = 0;
00135         uint8_t if_addr[16];
00136         while (arm_net_address_list_get_next(if_id, &i, if_addr) == 0) {
00137             if (memcmp(target_addr, if_addr, 16) == 0) {
00138                 return if_id;
00139             }
00140         }
00141     }
00142     return -1;
00143 }
00144 
00145 void* NanostackSocket::operator new(std::size_t sz) {
00146     return MALLOC(sz);
00147 }
00148 void NanostackSocket::operator delete(void* ptr) {
00149     FREE(ptr);
00150 }
00151 
00152 NanostackSocket::NanostackSocket(int8_t protocol)
00153 {
00154     nanostack_assert_locked();
00155 
00156     callback = NULL;
00157     callback_data = NULL;
00158     socket_id = -1;
00159     proto = protocol;
00160     addr_valid = false;
00161     memset(&ns_address, 0, sizeof(ns_address));
00162     mode = SOCKET_MODE_UNOPENED;
00163 }
00164 
00165 NanostackSocket::~NanostackSocket()
00166 {
00167     nanostack_assert_locked();
00168 
00169     if (mode != SOCKET_MODE_CLOSED) {
00170         close();
00171     }
00172 }
00173 
00174 bool NanostackSocket::open(void)
00175 {
00176     nanostack_assert_locked();
00177     MBED_ASSERT(SOCKET_MODE_UNOPENED == mode);
00178 
00179     int temp_socket = socket_open(proto, 0, socket_callback);
00180 
00181     if (temp_socket < 0) {
00182         tr_error("NanostackSocket::open() failed");
00183         return false;
00184     }
00185 
00186     if (proto == SOCKET_TCP) {
00187         /* Receive and send buffers enabled by default */
00188         mode = SOCKET_MODE_OPENED;
00189     } else {
00190         static const int32_t rcvbuf_size = 2048;
00191         socket_setsockopt(temp_socket, SOCKET_SOL_SOCKET, SOCKET_SO_RCVBUF, &rcvbuf_size, sizeof rcvbuf_size);
00192         mode = SOCKET_MODE_DATAGRAM;
00193     }
00194 
00195     return attach(temp_socket);
00196 }
00197 
00198 int NanostackSocket::accept(NanostackSocket *accepted_socket, ns_address_t *addr)
00199 {
00200     nanostack_assert_locked();
00201     MBED_ASSERT(SOCKET_MODE_LISTENING == mode && SOCKET_MODE_UNOPENED == accepted_socket->mode);
00202 
00203     int temp_socket = socket_accept(socket_id, addr, socket_callback);
00204     if (temp_socket < 0) {
00205         tr_error("NanostackSocket::accept() failed");
00206         return temp_socket;
00207     }
00208     if (!accepted_socket->attach(temp_socket)) {
00209         return -1;
00210     }
00211     accepted_socket->mode = SOCKET_MODE_STREAM;
00212     return temp_socket;
00213 }
00214 
00215 bool NanostackSocket::attach(int8_t temp_socket)
00216 {
00217     nanostack_assert_locked();
00218     if (temp_socket >= NS_INTERFACE_SOCKETS_MAX) {
00219         MBED_ASSERT(false);
00220         return false;
00221     }
00222     if (socket_tbl[temp_socket] != NULL) {
00223         MBED_ASSERT(false);
00224         return false;
00225     }
00226     socket_id = temp_socket;
00227     socket_tbl[socket_id] = this;
00228     return true;
00229 }
00230 
00231 void NanostackSocket::close()
00232 {
00233     nanostack_assert_locked();
00234     MBED_ASSERT(mode != SOCKET_MODE_CLOSED);
00235 
00236     if (socket_id >= 0) {
00237         nsapi_error_t ret = socket_close(socket_id);
00238         MBED_ASSERT(0 == ret);
00239         MBED_ASSERT(socket_tbl[socket_id] == this);
00240         socket_tbl[socket_id] = NULL;
00241         socket_id = -1;
00242     } else {
00243         MBED_ASSERT(SOCKET_MODE_UNOPENED == mode);
00244     }
00245 
00246     mode = SOCKET_MODE_CLOSED;
00247     signal_event();
00248 }
00249 
00250 bool NanostackSocket::is_connecting()
00251 {
00252     return SOCKET_MODE_CONNECTING == mode;
00253 }
00254 
00255 void NanostackSocket::set_connecting(ns_address_t *addr)
00256 {
00257     nanostack_assert_locked();
00258     MBED_ASSERT(SOCKET_MODE_OPENED == mode);
00259 
00260     memcpy(&ns_address, addr, sizeof(ns_address_t));
00261     mode = SOCKET_MODE_CONNECTING;
00262 }
00263 
00264 bool NanostackSocket::is_connected()
00265 {
00266     return SOCKET_MODE_STREAM == mode;
00267 }
00268 
00269 void NanostackSocket::set_connected()
00270 {
00271     nanostack_assert_locked();
00272     MBED_ASSERT(SOCKET_MODE_CONNECTING == mode);
00273 
00274     mode = SOCKET_MODE_STREAM;
00275 }
00276 
00277 bool NanostackSocket::is_listening()
00278 {
00279     return SOCKET_MODE_LISTENING == mode;
00280 }
00281 
00282 void NanostackSocket::set_listening()
00283 {
00284     nanostack_assert_locked();
00285     MBED_ASSERT(SOCKET_MODE_OPENED == mode);
00286 
00287     mode = SOCKET_MODE_LISTENING;
00288 }
00289 
00290 void NanostackSocket::signal_event()
00291 {
00292     nanostack_assert_locked();
00293 
00294     if (callback != NULL) {
00295         callback(callback_data);
00296     }
00297 }
00298 
00299 void NanostackSocket::socket_callback(void *cb) {
00300     nanostack_assert_locked();
00301 
00302     socket_callback_t *sock_cb = (socket_callback_t *) cb;
00303     NanostackSocket *socket = socket_tbl[sock_cb->socket_id];
00304     MBED_ASSERT(socket != NULL);
00305 
00306     tr_debug("socket_callback() sock=%d, event=%d, interface=%d, data len=%d",
00307                      sock_cb->socket_id, sock_cb->event_type, sock_cb->interface_id, sock_cb->d_len);
00308 
00309     switch (sock_cb->event_type) {
00310         case SOCKET_DATA:
00311             tr_debug("SOCKET_DATA, sock=%d, bytes=%d", sock_cb->socket_id, sock_cb->d_len);
00312             socket->event_data(sock_cb);
00313             break;
00314         case SOCKET_CONNECT_DONE:
00315             tr_debug("SOCKET_CONNECT_DONE");
00316             socket->event_connect_done(sock_cb);
00317             break;
00318         case SOCKET_CONNECT_FAIL:
00319             tr_debug("SOCKET_CONNECT_FAIL");
00320             socket->event_connect_fail(sock_cb);
00321             break;
00322         case SOCKET_CONNECT_AUTH_FAIL:
00323             tr_debug("SOCKET_CONNECT_AUTH_FAIL");
00324             break;
00325         case SOCKET_INCOMING_CONNECTION:
00326             tr_debug("SOCKET_INCOMING_CONNECTION");
00327             socket->event_incoming_connection(sock_cb);
00328             break;
00329         case SOCKET_TX_FAIL:
00330             tr_debug("SOCKET_TX_FAIL");
00331             socket->event_tx_fail(sock_cb);
00332             break;
00333         case SOCKET_CONNECT_CLOSED:
00334             tr_debug("SOCKET_CONNECT_CLOSED");
00335             socket->event_connect_closed(sock_cb);
00336             break;
00337         case SOCKET_CONNECTION_RESET:
00338             tr_debug("SOCKET_CONNECTION_RESET");
00339             socket->event_connection_reset(sock_cb);
00340             break;
00341         case SOCKET_NO_ROUTE:
00342             tr_debug("SOCKET_NO_ROUTE");
00343             socket->event_tx_fail(sock_cb);
00344             break;
00345         case SOCKET_TX_DONE:
00346             socket->event_tx_done(sock_cb);
00347             break;
00348         case SOCKET_NO_RAM:
00349             tr_debug("SOCKET_NO_RAM");
00350             socket->event_tx_fail(sock_cb);
00351             break;
00352         case SOCKET_CONNECTION_PROBLEM:
00353             tr_debug("SOCKET_CONNECTION_PROBLEM");
00354             break;
00355         default:
00356             break;
00357     }
00358 }
00359 
00360 
00361 void NanostackSocket::event_data(socket_callback_t *sock_cb)
00362 {
00363     nanostack_assert_locked();
00364     MBED_ASSERT((SOCKET_MODE_STREAM == mode) ||
00365                 (SOCKET_MODE_DATAGRAM == mode));
00366 
00367     signal_event();
00368 }
00369 
00370 void NanostackSocket::event_tx_done(socket_callback_t *sock_cb)
00371 {
00372     nanostack_assert_locked();
00373     MBED_ASSERT((SOCKET_MODE_STREAM == mode) ||
00374                 (SOCKET_MODE_DATAGRAM == mode));
00375 
00376     if (mode == SOCKET_MODE_DATAGRAM) {
00377         tr_debug("SOCKET_TX_DONE, %d bytes sent", sock_cb->d_len);
00378     } else if (mode == SOCKET_MODE_STREAM) {
00379         tr_debug("SOCKET_TX_DONE, %d bytes remaining", sock_cb->d_len);
00380     }
00381 
00382     signal_event();
00383 }
00384 
00385 void NanostackSocket::event_connect_done(socket_callback_t *sock_cb)
00386 {
00387     nanostack_assert_locked();
00388     MBED_ASSERT(SOCKET_MODE_CONNECTING == mode);
00389 
00390     set_connected();
00391     signal_event();
00392 }
00393 
00394 void NanostackSocket::event_connect_fail(socket_callback_t *sock_cb)
00395 {
00396     nanostack_assert_locked();
00397     MBED_ASSERT(mode == SOCKET_MODE_CONNECTING);
00398     close();
00399 }
00400 
00401 void NanostackSocket::event_incoming_connection(socket_callback_t *sock_cb)
00402 {
00403     nanostack_assert_locked();
00404     MBED_ASSERT(mode == SOCKET_MODE_LISTENING);
00405     signal_event();
00406 }
00407 
00408 void NanostackSocket::event_connect_closed(socket_callback_t *sock_cb)
00409 {
00410     nanostack_assert_locked();
00411 
00412     // Can happen if we have an orderly close()
00413     // Might never happen as we have not implemented shutdown() in abstraction layer.
00414     MBED_ASSERT(mode == SOCKET_MODE_STREAM);
00415     close();
00416 }
00417 
00418 void NanostackSocket::event_tx_fail(socket_callback_t *sock_cb)
00419 {
00420     nanostack_assert_locked();
00421 
00422     switch (mode) {
00423         case SOCKET_MODE_CONNECTING:
00424         case SOCKET_MODE_STREAM:
00425             // TX_FAIL is fatal for stream sockets
00426             close();
00427             break;
00428         case SOCKET_MODE_DATAGRAM:
00429             // TX_FAIL is non-fatal for datagram sockets
00430             break;
00431         default:
00432             MBED_ASSERT(false);
00433             break;
00434     }
00435 }
00436 
00437 void NanostackSocket::event_connection_reset(socket_callback_t *sock_cb)
00438 {
00439     nanostack_assert_locked();
00440 
00441     // Only TCP sockets can be closed by the remote end
00442     MBED_ASSERT((SOCKET_MODE_STREAM == mode) ||
00443                 (SOCKET_MODE_CONNECTING == mode));
00444     close();
00445 }
00446 
00447 NanostackInterface *NanostackInterface::_ns_interface;
00448 
00449 NanostackInterface *NanostackInterface::get_stack()
00450 {
00451     NanostackLockGuard lock;
00452 
00453     if (NULL == _ns_interface) {
00454         _ns_interface = new NanostackInterface();
00455     }
00456 
00457     return _ns_interface;
00458 }
00459 
00460 const char * NanostackInterface::get_ip_address()
00461 {
00462     NanostackLockGuard lock;
00463 
00464     for (int if_id = 1; if_id <= 127; if_id++) {
00465         uint8_t address[16];
00466         int ret = arm_net_address_get(if_id, ADDR_IPV6_GP, address);
00467         if (ret == 0) {
00468             ip6tos(address, text_ip_address);
00469             return text_ip_address;
00470         }
00471     }
00472     // Must result a valid IPv6 address
00473     // For gethostbyname() to detect IP version.
00474     return "::";
00475 }
00476 
00477 nsapi_error_t NanostackInterface::socket_open(void **handle, nsapi_protocol_t protocol)
00478 {
00479     // Validate parameters
00480     if (NULL == handle) {
00481         MBED_ASSERT(false);
00482         return NSAPI_ERROR_NO_SOCKET ;
00483     }
00484     int8_t ns_proto;
00485     if (NSAPI_UDP  == protocol) {
00486         ns_proto = SOCKET_UDP;
00487     } else if (NSAPI_TCP  == protocol) {
00488         ns_proto = SOCKET_TCP;
00489     } else {
00490         MBED_ASSERT(false);
00491         return NSAPI_ERROR_UNSUPPORTED ;
00492     }
00493     *handle = (void*)NULL;
00494 
00495     NanostackLockGuard lock;
00496 
00497     NanostackSocket * socket = new NanostackSocket(ns_proto);
00498     if (socket == NULL) {
00499         tr_debug("socket_open() ret=%i", NSAPI_ERROR_NO_MEMORY );
00500         return NSAPI_ERROR_NO_MEMORY ;
00501     }
00502     if (!socket->open()) {
00503         delete socket;
00504         tr_debug("socket_open() ret=%i", NSAPI_ERROR_DEVICE_ERROR );
00505         return NSAPI_ERROR_DEVICE_ERROR ;
00506     }
00507     *handle = (void*)socket;
00508 
00509     tr_debug("socket_open() socket=%p, sock_id=%d, ret=0", socket, socket->socket_id);
00510 
00511     return NSAPI_ERROR_OK ;
00512 }
00513 
00514 nsapi_error_t NanostackInterface::socket_close(void *handle)
00515 {
00516     NanostackLockGuard lock;
00517     // Validate parameters
00518     NanostackSocket * socket = static_cast<NanostackSocket *>(handle);
00519     if (NULL == handle) {
00520         MBED_ASSERT(false);
00521         return NSAPI_ERROR_NO_SOCKET ;
00522     }
00523     tr_debug("socket_close(socket=%p) sock_id=%d", socket, socket->socket_id);
00524 
00525     delete socket;
00526 
00527     return 0;
00528 
00529 }
00530 
00531 nsapi_size_or_error_t NanostackInterface::do_sendto(void *handle, const ns_address_t *address, const void *data, nsapi_size_t size)
00532 {
00533     // Validate parameters
00534     NanostackSocket * socket = static_cast<NanostackSocket *>(handle);
00535     if (handle == NULL) {
00536         MBED_ASSERT(false);
00537         return NSAPI_ERROR_NO_SOCKET ;
00538     }
00539 
00540     nsapi_size_or_error_t ret;
00541 
00542     NanostackLockGuard lock;
00543 
00544     if (socket->closed() || (!address && !socket->is_connected())) {
00545         ret = NSAPI_ERROR_NO_CONNECTION ;
00546         goto out;
00547     }
00548 
00549     if (address && socket->proto == SOCKET_TCP) {
00550         tr_error("socket_sendto() not supported with TCP!");
00551         ret = NSAPI_ERROR_IS_CONNECTED ;
00552         goto out;
00553     }
00554 
00555     int retcode;
00556 #if 0
00557     retcode = ::socket_sendto(socket->socket_id, address,
00558                                             data, size);
00559 #else
00560     // Use sendmsg purely to get the new return style
00561     // of returning data written rather than 0 on success,
00562     // which means TCP can do partial writes. (Sadly,
00563     // it's the only call which takes flags so we can
00564     // leave the NS_MSG_LEGACY0 flag clear).
00565     ns_msghdr_t msg;
00566     ns_iovec_t iov;
00567     iov.iov_base = const_cast<void *>(data);
00568     iov.iov_len = size;
00569     msg.msg_name = const_cast<ns_address_t *>(address);
00570     msg.msg_namelen = address ? sizeof *address : 0;
00571     msg.msg_iov = &iov;
00572     msg.msg_iovlen = 1;
00573     msg.msg_control = NULL;
00574     msg.msg_controllen = 0;
00575     retcode = ::socket_sendmsg(socket->socket_id, &msg, 0);
00576 #endif
00577 
00578     /*
00579      * \return length if entire amount written (which could be 0)
00580      * \return value >0 and <length if partial amount written (stream only)
00581      * \return NS_EWOULDBLOCK if nothing written due to lack of queue space.
00582      * \return -1 Invalid socket ID or message structure.
00583      * \return -2 Socket memory allocation fail.
00584      * \return -3 TCP state not established or address scope not defined .
00585      * \return -4 Socket TX process busy or unknown interface.
00586      * \return -5 Socket not connected
00587      * \return -6 Packet too short (ICMP raw socket error).
00588      * */
00589     if (retcode == NS_EWOULDBLOCK) {
00590         ret = NSAPI_ERROR_WOULD_BLOCK ;
00591     } else if (retcode < 0) {
00592         tr_error("socket_sendmsg: error=%d", retcode);
00593         ret = NSAPI_ERROR_DEVICE_ERROR ;
00594     } else {
00595         ret = retcode;
00596     }
00597 
00598 out:
00599     tr_debug("socket_sendto(socket=%p) sock_id=%d, ret=%i", socket, socket->socket_id, ret);
00600 
00601     return ret;
00602 }
00603 
00604 nsapi_size_or_error_t NanostackInterface::socket_sendto(void *handle, const SocketAddress &address, const void *data, nsapi_size_t size)
00605 {
00606     if (address.get_ip_version() != NSAPI_IPv6 ) {
00607         return NSAPI_ERROR_UNSUPPORTED ;
00608     }
00609 
00610     ns_address_t ns_address;
00611     convert_mbed_addr_to_ns(&ns_address, &address);
00612     /*No lock gaurd needed here as do_sendto() will handle locks.*/
00613     return do_sendto(handle, &ns_address, data, size);
00614 }
00615 
00616 nsapi_size_or_error_t NanostackInterface::socket_recvfrom(void *handle, SocketAddress *address, void *buffer, nsapi_size_t size)
00617 {
00618     // Validate parameters
00619     NanostackSocket *socket = static_cast<NanostackSocket *>(handle);
00620     if (handle == NULL) {
00621         MBED_ASSERT(false);
00622         return NSAPI_ERROR_NO_SOCKET ;
00623     }
00624 
00625     nsapi_size_or_error_t ret;
00626 
00627     NanostackLockGuard lock;
00628 
00629     if (socket->closed()) {
00630         ret = NSAPI_ERROR_NO_CONNECTION ;
00631         goto out;
00632     }
00633 
00634     ns_address_t ns_address;
00635 
00636     int retcode;
00637     retcode = ::socket_recvfrom(socket->socket_id, buffer, size, 0, &ns_address);
00638 
00639     if (retcode == NS_EWOULDBLOCK) {
00640         ret = NSAPI_ERROR_WOULD_BLOCK ;
00641     } else if (retcode < 0) {
00642         ret = NSAPI_ERROR_PARAMETER ;
00643     } else {
00644         ret = retcode;
00645         if (address != NULL) {
00646             convert_ns_addr_to_mbed(address, &ns_address);
00647         }
00648     }
00649 
00650 out:
00651     if (address) {
00652         tr_debug("socket_recvfrom(socket=%p) sock_id=%d, ret=%i, addr=[%s]:%i", socket, socket->socket_id, ret,
00653                  trace_ipv6(address->get_ip_bytes()), address->get_port());
00654     } else {
00655         tr_debug("socket_recv(socket=%p) sock_id=%d, ret=%i", socket, socket->socket_id, ret);
00656     }
00657 
00658     return ret;
00659 }
00660 
00661 nsapi_error_t NanostackInterface::socket_bind(void *handle, const SocketAddress &address)
00662 {
00663     // Validate parameters
00664     NanostackSocket *socket = static_cast<NanostackSocket *>(handle);
00665     if (handle == NULL) {
00666         MBED_ASSERT(false);
00667         return NSAPI_ERROR_NO_SOCKET ;
00668     }
00669 
00670     const void *addr_field;
00671     switch (address.get_ip_version()) {
00672         case NSAPI_IPv6 :
00673             addr_field = address.get_ip_bytes();
00674             break;
00675         case NSAPI_UNSPEC :
00676             addr_field = &ns_in6addr_any;
00677             break;
00678         default:
00679             return NSAPI_ERROR_UNSUPPORTED ;
00680     }
00681 
00682     NanostackLockGuard lock;
00683 
00684     ns_address_t ns_address;
00685     ns_address.type = ADDRESS_IPV6;
00686     memcpy(ns_address.address, addr_field, sizeof ns_address.address);
00687     ns_address.identifier = address.get_port();
00688     nsapi_error_t ret;
00689     int retcode = ::socket_bind(socket->socket_id, &ns_address);
00690 
00691     if (retcode == 0) {
00692         ret = NSAPI_ERROR_OK ;
00693     } else {
00694         ret = NSAPI_ERROR_PARAMETER ;
00695     }
00696 
00697     tr_debug("socket_bind(socket=%p) sock_id=%d, retcode=%i, ret=%i", socket, socket->socket_id, retcode, ret);
00698 
00699     return ret;
00700 }
00701 
00702 nsapi_error_t NanostackInterface::setsockopt(void *handle, int level, int optname, const void *optval, unsigned optlen)
00703 {
00704     NanostackSocket *socket = static_cast<NanostackSocket *>(handle);
00705     if (handle == NULL) {
00706         MBED_ASSERT(false);
00707         return NSAPI_ERROR_NO_SOCKET ;
00708     }
00709 
00710     NanostackLockGuard lock;
00711 
00712     ns_ipv6_mreq_t ns_mreq;
00713 
00714     if (level == NSAPI_SOCKET ) {
00715         switch (optname) {
00716             case NSAPI_ADD_MEMBERSHIP :
00717             case NSAPI_DROP_MEMBERSHIP : {
00718                 if (optlen != sizeof(nsapi_ip_mreq_t)) {
00719                     return NSAPI_ERROR_PARAMETER ;
00720                 }
00721                 const nsapi_ip_mreq_t *imr = static_cast<const nsapi_ip_mreq_t *>(optval);
00722 
00723                 /* Check address types are IPv6, or unspecified for interface */
00724                 if (imr->imr_multiaddr.version != NSAPI_IPv6  ||
00725                     (imr->imr_interface.version != NSAPI_UNSPEC  && imr->imr_interface.version != NSAPI_IPv6 )) {
00726                     return NSAPI_ERROR_PARAMETER ;
00727                 }
00728 
00729                 /* Convert all parameters to Nanostack native, and proceed with setsockopt */
00730                 memcpy(ns_mreq.ipv6mr_multiaddr, imr->imr_multiaddr.bytes, 16);
00731                 if (imr->imr_interface.version == NSAPI_UNSPEC  || memcmp(imr->imr_interface.bytes, ns_in6addr_any, 16) == 0) {
00732                     ns_mreq.ipv6mr_interface = 0;
00733                 } else {
00734                     // If this fails, Nanostack will itself fault the invalid -1 interface ID
00735                     ns_mreq.ipv6mr_interface = find_interface_by_address(imr->imr_interface.bytes);
00736                 }
00737 
00738                 level = SOCKET_IPPROTO_IPV6;
00739                 optname = optname == NSAPI_ADD_MEMBERSHIP  ? SOCKET_IPV6_JOIN_GROUP : SOCKET_IPV6_LEAVE_GROUP;
00740                 optval = &ns_mreq;
00741                 optlen = sizeof ns_mreq;
00742                 break;
00743             }
00744             default:
00745                 return NSAPI_ERROR_PARAMETER ;
00746         }
00747     }
00748 
00749     if (::socket_setsockopt(socket->socket_id, level, optname, optval, optlen) == 0) {
00750         return NSAPI_ERROR_OK ;
00751     } else {
00752         return NSAPI_ERROR_PARAMETER ;
00753     }
00754 }
00755 
00756 nsapi_error_t NanostackInterface::getsockopt(void *handle, int level, int optname, void *optval, unsigned *optlen)
00757 {
00758     NanostackSocket *socket = static_cast<NanostackSocket *>(handle);
00759     if (handle == NULL) {
00760         MBED_ASSERT(false);
00761         return NSAPI_ERROR_NO_SOCKET ;
00762     }
00763 
00764     nsapi_error_t ret;
00765 
00766     NanostackLockGuard lock;
00767 
00768     uint16_t optlen16 = *optlen;
00769     if (::socket_getsockopt(socket->socket_id, level, optname, optval, &optlen16) == 0) {
00770         ret = NSAPI_ERROR_OK ;
00771         *optlen = optlen16;
00772     } else {
00773         ret = NSAPI_ERROR_PARAMETER ;
00774     }
00775 
00776     return ret;
00777 }
00778 
00779 nsapi_error_t NanostackInterface::socket_listen(void *handle, int backlog)
00780 {
00781     //Check if socket exists
00782     NanostackSocket *socket = static_cast<NanostackSocket *>(handle);
00783     if (handle == NULL) {
00784         MBED_ASSERT(false);
00785         return NSAPI_ERROR_NO_SOCKET ;
00786     }
00787 
00788     nsapi_error_t ret = NSAPI_ERROR_OK ;
00789 
00790     NanostackLockGuard lock;
00791 
00792     if(::socket_listen(socket->socket_id, backlog) < 0) {
00793         ret = NSAPI_ERROR_PARAMETER ;
00794     } else {
00795         socket->set_listening();
00796     }
00797 
00798     return ret;
00799 }
00800 
00801 nsapi_error_t NanostackInterface::socket_connect(void *handle, const SocketAddress &addr)
00802 {
00803     // Validate parameters
00804     NanostackSocket *socket = static_cast<NanostackSocket *>(handle);
00805     nsapi_error_t ret;
00806     if (handle == NULL) {
00807         MBED_ASSERT(false);
00808         return NSAPI_ERROR_NO_SOCKET ;
00809     }
00810 
00811     NanostackLockGuard lock;
00812 
00813     if (addr.get_ip_version() != NSAPI_IPv6 ) {
00814         ret = NSAPI_ERROR_UNSUPPORTED ;
00815         goto out;
00816     }
00817 
00818     if (socket->closed()) {
00819         ret = NSAPI_ERROR_NO_CONNECTION ;
00820         goto out;
00821     }
00822 
00823     if (socket->is_connecting()) {
00824         ret = NSAPI_ERROR_ALREADY ;
00825         goto out;
00826     }
00827 
00828     if (socket->is_connected()) {
00829         ret = NSAPI_ERROR_IS_CONNECTED ;
00830         goto out;
00831     }
00832 
00833     ns_address_t ns_addr;
00834 
00835     convert_mbed_addr_to_ns(&ns_addr, &addr);
00836     if (::socket_connect(socket->socket_id, &ns_addr, 0) == 0) {
00837         if (socket->proto == SOCKET_TCP) {
00838             socket->set_connecting(&ns_addr);
00839             ret = NSAPI_ERROR_IN_PROGRESS ;
00840         } else {
00841             ret = NSAPI_ERROR_OK ;
00842         }
00843     } else {
00844         ret = NSAPI_ERROR_DEVICE_ERROR ;
00845     }
00846 
00847 out:
00848     tr_debug("socket_connect(socket=%p) sock_id=%d, ret=%i", socket, socket->socket_id, ret);
00849 
00850     return ret;
00851 }
00852 
00853 nsapi_error_t NanostackInterface::socket_accept(void *server, void **handle, SocketAddress *address)
00854 {
00855     NanostackSocket * socket = static_cast<NanostackSocket *>(server);
00856     NanostackSocket *accepted_sock = NULL;
00857     nsapi_error_t ret;
00858 
00859     if (handle == NULL) {
00860         MBED_ASSERT(false);
00861         return NSAPI_ERROR_NO_SOCKET ;
00862     }
00863 
00864     NanostackLockGuard lock;
00865 
00866     if (!socket->is_listening()) {
00867         ret = NSAPI_ERROR_PARAMETER ;
00868         goto out;
00869     }
00870 
00871     accepted_sock = new NanostackSocket(socket->proto);
00872     if (accepted_sock == NULL) {
00873         ret = NSAPI_ERROR_NO_MEMORY ;
00874         goto out;
00875     }
00876 
00877     ns_address_t ns_addr;
00878     int retcode;
00879     retcode = socket->accept(accepted_sock, &ns_addr);
00880     if (retcode < 0) {
00881         delete accepted_sock;
00882         if (retcode == NS_EWOULDBLOCK) {
00883             ret = NSAPI_ERROR_WOULD_BLOCK ;
00884         } else {
00885             ret = NSAPI_ERROR_DEVICE_ERROR ;
00886         }
00887         goto out;
00888     }
00889     ret = NSAPI_ERROR_OK ;
00890 
00891     if (address) {
00892         convert_ns_addr_to_mbed(address, &ns_addr);
00893     }
00894 
00895     *handle = accepted_sock;
00896 
00897 out:
00898     tr_debug("socket_accept() socket=%p, sock_id=%d, ret=%i", accepted_sock, accepted_sock ? accepted_sock->socket_id : -1, ret);
00899 
00900     return ret;
00901 }
00902 
00903 nsapi_size_or_error_t NanostackInterface::socket_send(void *handle, const void *data, nsapi_size_t size)
00904 {
00905     return do_sendto(handle, NULL, data, size);
00906 }
00907 
00908 nsapi_size_or_error_t NanostackInterface::socket_recv(void *handle, void *data, nsapi_size_t size)
00909 {
00910     return socket_recvfrom(handle, NULL, data, size);
00911 }
00912 
00913 void NanostackInterface::socket_attach(void *handle, void (*callback)(void *), void *id)
00914 {
00915     // Validate parameters
00916     NanostackSocket * socket = static_cast<NanostackSocket *>(handle);
00917     if (handle == NULL) {
00918         MBED_ASSERT(false);
00919         return;
00920     }
00921 
00922     NanostackLockGuard lock;
00923 
00924     socket->callback = callback;
00925     socket->callback_data = id;
00926 
00927     tr_debug("socket_attach(socket=%p) sock_id=%d", socket, socket->socket_id);
00928 }