Pascal Nysten / lwip

Adapted to Lora Semtech + Nucleo

Dependencies:   DebugLib

Dependents:   LoRaWAN-lmic-app LoRaWAN-lmic-app LoRaWAN-test-10secs LoRaPersonalizedDeviceForEverynet ... more

Fork of lwip_ppp_ethernet by Donatien Garnier

src/api/api_msg.c@3:a9e6ba815945, 2015-11-20 (annotated)

Committer:
pnysten
Date:
Fri Nov 20 12:30:58 2015 +0000
Revision:
3:a9e6ba815945
Parent:
0:8e01dca41002 
Adapted to Nucleo, LoRa Semtech

Who changed what in which revision?

UserRevisionLine numberNew contents of line
donatien 0:8e01dca41002 1 /**
donatien 0:8e01dca41002 2 * @file
donatien 0:8e01dca41002 3 * Sequential API Internal module
donatien 0:8e01dca41002 4 *
donatien 0:8e01dca41002 5 */
donatien 0:8e01dca41002 6
donatien 0:8e01dca41002 7 /*
donatien 0:8e01dca41002 8 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
donatien 0:8e01dca41002 9 * All rights reserved.
donatien 0:8e01dca41002 10 *
donatien 0:8e01dca41002 11 * Redistribution and use in source and binary forms, with or without modification,
donatien 0:8e01dca41002 12 * are permitted provided that the following conditions are met:
donatien 0:8e01dca41002 13 *
donatien 0:8e01dca41002 14 * 1. Redistributions of source code must retain the above copyright notice,
donatien 0:8e01dca41002 15 * this list of conditions and the following disclaimer.
donatien 0:8e01dca41002 16 * 2. Redistributions in binary form must reproduce the above copyright notice,
donatien 0:8e01dca41002 17 * this list of conditions and the following disclaimer in the documentation
donatien 0:8e01dca41002 18 * and/or other materials provided with the distribution.
donatien 0:8e01dca41002 19 * 3. The name of the author may not be used to endorse or promote products
donatien 0:8e01dca41002 20 * derived from this software without specific prior written permission.
donatien 0:8e01dca41002 21 *
donatien 0:8e01dca41002 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
donatien 0:8e01dca41002 23 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
donatien 0:8e01dca41002 24 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
donatien 0:8e01dca41002 25 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
donatien 0:8e01dca41002 26 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
donatien 0:8e01dca41002 27 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
donatien 0:8e01dca41002 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
donatien 0:8e01dca41002 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
donatien 0:8e01dca41002 30 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
donatien 0:8e01dca41002 31 * OF SUCH DAMAGE.
donatien 0:8e01dca41002 32 *
donatien 0:8e01dca41002 33 * This file is part of the lwIP TCP/IP stack.
donatien 0:8e01dca41002 34 *
donatien 0:8e01dca41002 35 * Author: Adam Dunkels <adam@sics.se>
donatien 0:8e01dca41002 36 *
donatien 0:8e01dca41002 37 */
donatien 0:8e01dca41002 38
donatien 0:8e01dca41002 39 #include "lwip/opt.h"
donatien 0:8e01dca41002 40
donatien 0:8e01dca41002 41 #if LWIP_NETCONN /* don't build if not configured for use in lwipopts.h */
donatien 0:8e01dca41002 42
donatien 0:8e01dca41002 43 #include "lwip/api_msg.h"
donatien 0:8e01dca41002 44
donatien 0:8e01dca41002 45 #include "lwip/ip.h"
donatien 0:8e01dca41002 46 #include "lwip/udp.h"
donatien 0:8e01dca41002 47 #include "lwip/tcp.h"
donatien 0:8e01dca41002 48 #include "lwip/raw.h"
donatien 0:8e01dca41002 49
donatien 0:8e01dca41002 50 #include "lwip/memp.h"
donatien 0:8e01dca41002 51 #include "lwip/tcpip.h"
donatien 0:8e01dca41002 52 #include "lwip/igmp.h"
donatien 0:8e01dca41002 53 #include "lwip/dns.h"
donatien 0:8e01dca41002 54
donatien 0:8e01dca41002 55 #include <string.h>
donatien 0:8e01dca41002 56
donatien 0:8e01dca41002 57 #define SET_NONBLOCKING_CONNECT(conn, val) do { if(val) { \
donatien 0:8e01dca41002 58 (conn)->flags |= NETCONN_FLAG_IN_NONBLOCKING_CONNECT; \
donatien 0:8e01dca41002 59 } else { \
donatien 0:8e01dca41002 60 (conn)->flags &= ~ NETCONN_FLAG_IN_NONBLOCKING_CONNECT; }} while(0)
donatien 0:8e01dca41002 61 #define IN_NONBLOCKING_CONNECT(conn) (((conn)->flags & NETCONN_FLAG_IN_NONBLOCKING_CONNECT) != 0)
donatien 0:8e01dca41002 62
donatien 0:8e01dca41002 63 /* forward declarations */
donatien 0:8e01dca41002 64 #if LWIP_TCP
donatien 0:8e01dca41002 65 static err_t do_writemore(struct netconn *conn);
donatien 0:8e01dca41002 66 static void do_close_internal(struct netconn *conn);
donatien 0:8e01dca41002 67 #endif
donatien 0:8e01dca41002 68
donatien 0:8e01dca41002 69 #if LWIP_RAW
donatien 0:8e01dca41002 70 /**
donatien 0:8e01dca41002 71 * Receive callback function for RAW netconns.
donatien 0:8e01dca41002 72 * Doesn't 'eat' the packet, only references it and sends it to
donatien 0:8e01dca41002 73 * conn->recvmbox
donatien 0:8e01dca41002 74 *
donatien 0:8e01dca41002 75 * @see raw.h (struct raw_pcb.recv) for parameters and return value
donatien 0:8e01dca41002 76 */
donatien 0:8e01dca41002 77 static u8_t
donatien 0:8e01dca41002 78 recv_raw(void *arg, struct raw_pcb *pcb, struct pbuf *p,
donatien 0:8e01dca41002 79 ip_addr_t *addr)
donatien 0:8e01dca41002 80 {
donatien 0:8e01dca41002 81 struct pbuf *q;
donatien 0:8e01dca41002 82 struct netbuf *buf;
donatien 0:8e01dca41002 83 struct netconn *conn;
donatien 0:8e01dca41002 84
donatien 0:8e01dca41002 85 LWIP_UNUSED_ARG(addr);
donatien 0:8e01dca41002 86 conn = (struct netconn *)arg;
donatien 0:8e01dca41002 87
donatien 0:8e01dca41002 88 if ((conn != NULL) && sys_mbox_valid(&conn->recvmbox)) {
donatien 0:8e01dca41002 89 #if LWIP_SO_RCVBUF
donatien 0:8e01dca41002 90 int recv_avail;
donatien 0:8e01dca41002 91 SYS_ARCH_GET(conn->recv_avail, recv_avail);
donatien 0:8e01dca41002 92 if ((recv_avail + (int)(p->tot_len)) > conn->recv_bufsize) {
donatien 0:8e01dca41002 93 return 0;
donatien 0:8e01dca41002 94 }
donatien 0:8e01dca41002 95 #endif /* LWIP_SO_RCVBUF */
donatien 0:8e01dca41002 96 /* copy the whole packet into new pbufs */
donatien 0:8e01dca41002 97 q = pbuf_alloc(PBUF_RAW, p->tot_len, PBUF_RAM);
donatien 0:8e01dca41002 98 if(q != NULL) {
donatien 0:8e01dca41002 99 if (pbuf_copy(q, p) != ERR_OK) {
donatien 0:8e01dca41002 100 pbuf_free(q);
donatien 0:8e01dca41002 101 q = NULL;
donatien 0:8e01dca41002 102 }
donatien 0:8e01dca41002 103 }
donatien 0:8e01dca41002 104
donatien 0:8e01dca41002 105 if (q != NULL) {
donatien 0:8e01dca41002 106 u16_t len;
donatien 0:8e01dca41002 107 buf = (struct netbuf *)memp_malloc(MEMP_NETBUF);
donatien 0:8e01dca41002 108 if (buf == NULL) {
donatien 0:8e01dca41002 109 pbuf_free(q);
donatien 0:8e01dca41002 110 return 0;
donatien 0:8e01dca41002 111 }
donatien 0:8e01dca41002 112
donatien 0:8e01dca41002 113 buf->p = q;
donatien 0:8e01dca41002 114 buf->ptr = q;
donatien 0:8e01dca41002 115 ip_addr_copy(buf->addr, *ip_current_src_addr());
donatien 0:8e01dca41002 116 buf->port = pcb->protocol;
donatien 0:8e01dca41002 117
donatien 0:8e01dca41002 118 len = q->tot_len;
donatien 0:8e01dca41002 119 if (sys_mbox_trypost(&conn->recvmbox, buf) != ERR_OK) {
donatien 0:8e01dca41002 120 netbuf_delete(buf);
donatien 0:8e01dca41002 121 return 0;
donatien 0:8e01dca41002 122 } else {
donatien 0:8e01dca41002 123 #if LWIP_SO_RCVBUF
donatien 0:8e01dca41002 124 SYS_ARCH_INC(conn->recv_avail, len);
donatien 0:8e01dca41002 125 #endif /* LWIP_SO_RCVBUF */
donatien 0:8e01dca41002 126 /* Register event with callback */
donatien 0:8e01dca41002 127 API_EVENT(conn, NETCONN_EVT_RCVPLUS, len);
donatien 0:8e01dca41002 128 }
donatien 0:8e01dca41002 129 }
donatien 0:8e01dca41002 130 }
donatien 0:8e01dca41002 131
donatien 0:8e01dca41002 132 return 0; /* do not eat the packet */
donatien 0:8e01dca41002 133 }
donatien 0:8e01dca41002 134 #endif /* LWIP_RAW*/
donatien 0:8e01dca41002 135
donatien 0:8e01dca41002 136 #if LWIP_UDP
donatien 0:8e01dca41002 137 /**
donatien 0:8e01dca41002 138 * Receive callback function for UDP netconns.
donatien 0:8e01dca41002 139 * Posts the packet to conn->recvmbox or deletes it on memory error.
donatien 0:8e01dca41002 140 *
donatien 0:8e01dca41002 141 * @see udp.h (struct udp_pcb.recv) for parameters
donatien 0:8e01dca41002 142 */
donatien 0:8e01dca41002 143 static void
donatien 0:8e01dca41002 144 recv_udp(void *arg, struct udp_pcb *pcb, struct pbuf *p,
donatien 0:8e01dca41002 145 ip_addr_t *addr, u16_t port)
donatien 0:8e01dca41002 146 {
donatien 0:8e01dca41002 147 struct netbuf *buf;
donatien 0:8e01dca41002 148 struct netconn *conn;
donatien 0:8e01dca41002 149 u16_t len;
donatien 0:8e01dca41002 150 #if LWIP_SO_RCVBUF
donatien 0:8e01dca41002 151 int recv_avail;
donatien 0:8e01dca41002 152 #endif /* LWIP_SO_RCVBUF */
donatien 0:8e01dca41002 153
donatien 0:8e01dca41002 154 LWIP_UNUSED_ARG(pcb); /* only used for asserts... */
donatien 0:8e01dca41002 155 LWIP_ASSERT("recv_udp must have a pcb argument", pcb != NULL);
donatien 0:8e01dca41002 156 LWIP_ASSERT("recv_udp must have an argument", arg != NULL);
donatien 0:8e01dca41002 157 conn = (struct netconn *)arg;
donatien 0:8e01dca41002 158 LWIP_ASSERT("recv_udp: recv for wrong pcb!", conn->pcb.udp == pcb);
donatien 0:8e01dca41002 159
donatien 0:8e01dca41002 160 #if LWIP_SO_RCVBUF
donatien 0:8e01dca41002 161 SYS_ARCH_GET(conn->recv_avail, recv_avail);
donatien 0:8e01dca41002 162 if ((conn == NULL) || !sys_mbox_valid(&conn->recvmbox) ||
donatien 0:8e01dca41002 163 ((recv_avail + (int)(p->tot_len)) > conn->recv_bufsize)) {
donatien 0:8e01dca41002 164 #else /* LWIP_SO_RCVBUF */
donatien 0:8e01dca41002 165 if ((conn == NULL) || !sys_mbox_valid(&conn->recvmbox)) {
donatien 0:8e01dca41002 166 #endif /* LWIP_SO_RCVBUF */
donatien 0:8e01dca41002 167 pbuf_free(p);
donatien 0:8e01dca41002 168 return;
donatien 0:8e01dca41002 169 }
donatien 0:8e01dca41002 170
donatien 0:8e01dca41002 171 buf = (struct netbuf *)memp_malloc(MEMP_NETBUF);
donatien 0:8e01dca41002 172 if (buf == NULL) {
donatien 0:8e01dca41002 173 pbuf_free(p);
donatien 0:8e01dca41002 174 return;
donatien 0:8e01dca41002 175 } else {
donatien 0:8e01dca41002 176 buf->p = p;
donatien 0:8e01dca41002 177 buf->ptr = p;
donatien 0:8e01dca41002 178 ip_addr_set(&buf->addr, addr);
donatien 0:8e01dca41002 179 buf->port = port;
donatien 0:8e01dca41002 180 #if LWIP_NETBUF_RECVINFO
donatien 0:8e01dca41002 181 {
donatien 0:8e01dca41002 182 const struct ip_hdr* iphdr = ip_current_header();
donatien 0:8e01dca41002 183 /* get the UDP header - always in the first pbuf, ensured by udp_input */
donatien 0:8e01dca41002 184 const struct udp_hdr* udphdr = (void*)(((char*)iphdr) + IPH_LEN(iphdr));
donatien 0:8e01dca41002 185 #if LWIP_CHECKSUM_ON_COPY
donatien 0:8e01dca41002 186 buf->flags = NETBUF_FLAG_DESTADDR;
donatien 0:8e01dca41002 187 #endif /* LWIP_CHECKSUM_ON_COPY */
donatien 0:8e01dca41002 188 ip_addr_set(&buf->toaddr, ip_current_dest_addr());
donatien 0:8e01dca41002 189 buf->toport_chksum = udphdr->dest;
donatien 0:8e01dca41002 190 }
donatien 0:8e01dca41002 191 #endif /* LWIP_NETBUF_RECVINFO */
donatien 0:8e01dca41002 192 }
donatien 0:8e01dca41002 193
donatien 0:8e01dca41002 194 len = p->tot_len;
donatien 0:8e01dca41002 195 if (sys_mbox_trypost(&conn->recvmbox, buf) != ERR_OK) {
donatien 0:8e01dca41002 196 netbuf_delete(buf);
donatien 0:8e01dca41002 197 return;
donatien 0:8e01dca41002 198 } else {
donatien 0:8e01dca41002 199 #if LWIP_SO_RCVBUF
donatien 0:8e01dca41002 200 SYS_ARCH_INC(conn->recv_avail, len);
donatien 0:8e01dca41002 201 #endif /* LWIP_SO_RCVBUF */
donatien 0:8e01dca41002 202 /* Register event with callback */
donatien 0:8e01dca41002 203 API_EVENT(conn, NETCONN_EVT_RCVPLUS, len);
donatien 0:8e01dca41002 204 }
donatien 0:8e01dca41002 205 }
donatien 0:8e01dca41002 206 #endif /* LWIP_UDP */
donatien 0:8e01dca41002 207
donatien 0:8e01dca41002 208 #if LWIP_TCP
donatien 0:8e01dca41002 209 /**
donatien 0:8e01dca41002 210 * Receive callback function for TCP netconns.
donatien 0:8e01dca41002 211 * Posts the packet to conn->recvmbox, but doesn't delete it on errors.
donatien 0:8e01dca41002 212 *
donatien 0:8e01dca41002 213 * @see tcp.h (struct tcp_pcb.recv) for parameters and return value
donatien 0:8e01dca41002 214 */
donatien 0:8e01dca41002 215 static err_t
donatien 0:8e01dca41002 216 recv_tcp(void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err)
donatien 0:8e01dca41002 217 {
donatien 0:8e01dca41002 218 struct netconn *conn;
donatien 0:8e01dca41002 219 u16_t len;
donatien 0:8e01dca41002 220
donatien 0:8e01dca41002 221 LWIP_UNUSED_ARG(pcb);
donatien 0:8e01dca41002 222 LWIP_ASSERT("recv_tcp must have a pcb argument", pcb != NULL);
donatien 0:8e01dca41002 223 LWIP_ASSERT("recv_tcp must have an argument", arg != NULL);
donatien 0:8e01dca41002 224 conn = (struct netconn *)arg;
donatien 0:8e01dca41002 225 LWIP_ASSERT("recv_tcp: recv for wrong pcb!", conn->pcb.tcp == pcb);
donatien 0:8e01dca41002 226
donatien 0:8e01dca41002 227 if (conn == NULL) {
donatien 0:8e01dca41002 228 return ERR_VAL;
donatien 0:8e01dca41002 229 }
donatien 0:8e01dca41002 230 if (!sys_mbox_valid(&conn->recvmbox)) {
donatien 0:8e01dca41002 231 /* recvmbox already deleted */
donatien 0:8e01dca41002 232 if (p != NULL) {
donatien 0:8e01dca41002 233 tcp_recved(pcb, p->tot_len);
donatien 0:8e01dca41002 234 pbuf_free(p);
donatien 0:8e01dca41002 235 }
donatien 0:8e01dca41002 236 return ERR_OK;
donatien 0:8e01dca41002 237 }
donatien 0:8e01dca41002 238 /* Unlike for UDP or RAW pcbs, don't check for available space
donatien 0:8e01dca41002 239 using recv_avail since that could break the connection
donatien 0:8e01dca41002 240 (data is already ACKed) */
donatien 0:8e01dca41002 241
donatien 0:8e01dca41002 242 /* don't overwrite fatal errors! */
donatien 0:8e01dca41002 243 NETCONN_SET_SAFE_ERR(conn, err);
donatien 0:8e01dca41002 244
donatien 0:8e01dca41002 245 if (p != NULL) {
donatien 0:8e01dca41002 246 len = p->tot_len;
donatien 0:8e01dca41002 247 } else {
donatien 0:8e01dca41002 248 len = 0;
donatien 0:8e01dca41002 249 }
donatien 0:8e01dca41002 250
donatien 0:8e01dca41002 251 if (sys_mbox_trypost(&conn->recvmbox, p) != ERR_OK) {
donatien 0:8e01dca41002 252 /* don't deallocate p: it is presented to us later again from tcp_fasttmr! */
donatien 0:8e01dca41002 253 return ERR_MEM;
donatien 0:8e01dca41002 254 } else {
donatien 0:8e01dca41002 255 #if LWIP_SO_RCVBUF
donatien 0:8e01dca41002 256 SYS_ARCH_INC(conn->recv_avail, len);
donatien 0:8e01dca41002 257 #endif /* LWIP_SO_RCVBUF */
donatien 0:8e01dca41002 258 /* Register event with callback */
donatien 0:8e01dca41002 259 API_EVENT(conn, NETCONN_EVT_RCVPLUS, len);
donatien 0:8e01dca41002 260 }
donatien 0:8e01dca41002 261
donatien 0:8e01dca41002 262 return ERR_OK;
donatien 0:8e01dca41002 263 }
donatien 0:8e01dca41002 264
donatien 0:8e01dca41002 265 /**
donatien 0:8e01dca41002 266 * Poll callback function for TCP netconns.
donatien 0:8e01dca41002 267 * Wakes up an application thread that waits for a connection to close
donatien 0:8e01dca41002 268 * or data to be sent. The application thread then takes the
donatien 0:8e01dca41002 269 * appropriate action to go on.
donatien 0:8e01dca41002 270 *
donatien 0:8e01dca41002 271 * Signals the conn->sem.
donatien 0:8e01dca41002 272 * netconn_close waits for conn->sem if closing failed.
donatien 0:8e01dca41002 273 *
donatien 0:8e01dca41002 274 * @see tcp.h (struct tcp_pcb.poll) for parameters and return value
donatien 0:8e01dca41002 275 */
donatien 0:8e01dca41002 276 static err_t
donatien 0:8e01dca41002 277 poll_tcp(void *arg, struct tcp_pcb *pcb)
donatien 0:8e01dca41002 278 {
donatien 0:8e01dca41002 279 struct netconn *conn = (struct netconn *)arg;
donatien 0:8e01dca41002 280
donatien 0:8e01dca41002 281 LWIP_UNUSED_ARG(pcb);
donatien 0:8e01dca41002 282 LWIP_ASSERT("conn != NULL", (conn != NULL));
donatien 0:8e01dca41002 283
donatien 0:8e01dca41002 284 if (conn->state == NETCONN_WRITE) {
donatien 0:8e01dca41002 285 do_writemore(conn);
donatien 0:8e01dca41002 286 } else if (conn->state == NETCONN_CLOSE) {
donatien 0:8e01dca41002 287 do_close_internal(conn);
donatien 0:8e01dca41002 288 }
donatien 0:8e01dca41002 289 /* @todo: implement connect timeout here? */
donatien 0:8e01dca41002 290
donatien 0:8e01dca41002 291 /* Did a nonblocking write fail before? Then check available write-space. */
donatien 0:8e01dca41002 292 if (conn->flags & NETCONN_FLAG_CHECK_WRITESPACE) {
donatien 0:8e01dca41002 293 /* If the queued byte- or pbuf-count drops below the configured low-water limit,
donatien 0:8e01dca41002 294 let select mark this pcb as writable again. */
donatien 0:8e01dca41002 295 if ((conn->pcb.tcp != NULL) && (tcp_sndbuf(conn->pcb.tcp) > TCP_SNDLOWAT) &&
donatien 0:8e01dca41002 296 (tcp_sndqueuelen(conn->pcb.tcp) < TCP_SNDQUEUELOWAT)) {
donatien 0:8e01dca41002 297 conn->flags &= ~NETCONN_FLAG_CHECK_WRITESPACE;
donatien 0:8e01dca41002 298 API_EVENT(conn, NETCONN_EVT_SENDPLUS, 0);
donatien 0:8e01dca41002 299 }
donatien 0:8e01dca41002 300 }
donatien 0:8e01dca41002 301
donatien 0:8e01dca41002 302 return ERR_OK;
donatien 0:8e01dca41002 303 }
donatien 0:8e01dca41002 304
donatien 0:8e01dca41002 305 /**
donatien 0:8e01dca41002 306 * Sent callback function for TCP netconns.
donatien 0:8e01dca41002 307 * Signals the conn->sem and calls API_EVENT.
donatien 0:8e01dca41002 308 * netconn_write waits for conn->sem if send buffer is low.
donatien 0:8e01dca41002 309 *
donatien 0:8e01dca41002 310 * @see tcp.h (struct tcp_pcb.sent) for parameters and return value
donatien 0:8e01dca41002 311 */
donatien 0:8e01dca41002 312 static err_t
donatien 0:8e01dca41002 313 sent_tcp(void *arg, struct tcp_pcb *pcb, u16_t len)
donatien 0:8e01dca41002 314 {
donatien 0:8e01dca41002 315 struct netconn *conn = (struct netconn *)arg;
donatien 0:8e01dca41002 316
donatien 0:8e01dca41002 317 LWIP_UNUSED_ARG(pcb);
donatien 0:8e01dca41002 318 LWIP_ASSERT("conn != NULL", (conn != NULL));
donatien 0:8e01dca41002 319
donatien 0:8e01dca41002 320 if (conn->state == NETCONN_WRITE) {
donatien 0:8e01dca41002 321 do_writemore(conn);
donatien 0:8e01dca41002 322 } else if (conn->state == NETCONN_CLOSE) {
donatien 0:8e01dca41002 323 do_close_internal(conn);
donatien 0:8e01dca41002 324 }
donatien 0:8e01dca41002 325
donatien 0:8e01dca41002 326 if (conn) {
donatien 0:8e01dca41002 327 /* If the queued byte- or pbuf-count drops below the configured low-water limit,
donatien 0:8e01dca41002 328 let select mark this pcb as writable again. */
donatien 0:8e01dca41002 329 if ((conn->pcb.tcp != NULL) && (tcp_sndbuf(conn->pcb.tcp) > TCP_SNDLOWAT) &&
donatien 0:8e01dca41002 330 (tcp_sndqueuelen(conn->pcb.tcp) < TCP_SNDQUEUELOWAT)) {
donatien 0:8e01dca41002 331 conn->flags &= ~NETCONN_FLAG_CHECK_WRITESPACE;
donatien 0:8e01dca41002 332 API_EVENT(conn, NETCONN_EVT_SENDPLUS, len);
donatien 0:8e01dca41002 333 }
donatien 0:8e01dca41002 334 }
donatien 0:8e01dca41002 335
donatien 0:8e01dca41002 336 return ERR_OK;
donatien 0:8e01dca41002 337 }
donatien 0:8e01dca41002 338
donatien 0:8e01dca41002 339 /**
donatien 0:8e01dca41002 340 * Error callback function for TCP netconns.
donatien 0:8e01dca41002 341 * Signals conn->sem, posts to all conn mboxes and calls API_EVENT.
donatien 0:8e01dca41002 342 * The application thread has then to decide what to do.
donatien 0:8e01dca41002 343 *
donatien 0:8e01dca41002 344 * @see tcp.h (struct tcp_pcb.err) for parameters
donatien 0:8e01dca41002 345 */
donatien 0:8e01dca41002 346 static void
donatien 0:8e01dca41002 347 err_tcp(void *arg, err_t err)
donatien 0:8e01dca41002 348 {
donatien 0:8e01dca41002 349 struct netconn *conn;
donatien 0:8e01dca41002 350 enum netconn_state old_state;
donatien 0:8e01dca41002 351 SYS_ARCH_DECL_PROTECT(lev);
donatien 0:8e01dca41002 352
donatien 0:8e01dca41002 353 conn = (struct netconn *)arg;
donatien 0:8e01dca41002 354 LWIP_ASSERT("conn != NULL", (conn != NULL));
donatien 0:8e01dca41002 355
donatien 0:8e01dca41002 356 conn->pcb.tcp = NULL;
donatien 0:8e01dca41002 357
donatien 0:8e01dca41002 358 /* no check since this is always fatal! */
donatien 0:8e01dca41002 359 SYS_ARCH_PROTECT(lev);
donatien 0:8e01dca41002 360 conn->last_err = err;
donatien 0:8e01dca41002 361 SYS_ARCH_UNPROTECT(lev);
donatien 0:8e01dca41002 362
donatien 0:8e01dca41002 363 /* reset conn->state now before waking up other threads */
donatien 0:8e01dca41002 364 old_state = conn->state;
donatien 0:8e01dca41002 365 conn->state = NETCONN_NONE;
donatien 0:8e01dca41002 366
donatien 0:8e01dca41002 367 /* Notify the user layer about a connection error. Used to signal
donatien 0:8e01dca41002 368 select. */
donatien 0:8e01dca41002 369 API_EVENT(conn, NETCONN_EVT_ERROR, 0);
donatien 0:8e01dca41002 370 /* Try to release selects pending on 'read' or 'write', too.
donatien 0:8e01dca41002 371 They will get an error if they actually try to read or write. */
donatien 0:8e01dca41002 372 API_EVENT(conn, NETCONN_EVT_RCVPLUS, 0);
donatien 0:8e01dca41002 373 API_EVENT(conn, NETCONN_EVT_SENDPLUS, 0);
donatien 0:8e01dca41002 374
donatien 0:8e01dca41002 375 /* pass NULL-message to recvmbox to wake up pending recv */
donatien 0:8e01dca41002 376 if (sys_mbox_valid(&conn->recvmbox)) {
donatien 0:8e01dca41002 377 /* use trypost to prevent deadlock */
donatien 0:8e01dca41002 378 sys_mbox_trypost(&conn->recvmbox, NULL);
donatien 0:8e01dca41002 379 }
donatien 0:8e01dca41002 380 /* pass NULL-message to acceptmbox to wake up pending accept */
donatien 0:8e01dca41002 381 if (sys_mbox_valid(&conn->acceptmbox)) {
donatien 0:8e01dca41002 382 /* use trypost to preven deadlock */
donatien 0:8e01dca41002 383 sys_mbox_trypost(&conn->acceptmbox, NULL);
donatien 0:8e01dca41002 384 }
donatien 0:8e01dca41002 385
donatien 0:8e01dca41002 386 if ((old_state == NETCONN_WRITE) || (old_state == NETCONN_CLOSE) ||
donatien 0:8e01dca41002 387 (old_state == NETCONN_CONNECT)) {
donatien 0:8e01dca41002 388 /* calling do_writemore/do_close_internal is not necessary
donatien 0:8e01dca41002 389 since the pcb has already been deleted! */
donatien 0:8e01dca41002 390 int was_nonblocking_connect = IN_NONBLOCKING_CONNECT(conn);
donatien 0:8e01dca41002 391 SET_NONBLOCKING_CONNECT(conn, 0);
donatien 0:8e01dca41002 392
donatien 0:8e01dca41002 393 if (!was_nonblocking_connect) {
donatien 0:8e01dca41002 394 /* set error return code */
donatien 0:8e01dca41002 395 LWIP_ASSERT("conn->current_msg != NULL", conn->current_msg != NULL);
donatien 0:8e01dca41002 396 conn->current_msg->err = err;
donatien 0:8e01dca41002 397 conn->current_msg = NULL;
donatien 0:8e01dca41002 398 /* wake up the waiting task */
donatien 0:8e01dca41002 399 sys_sem_signal(&conn->op_completed);
donatien 0:8e01dca41002 400 }
donatien 0:8e01dca41002 401 } else {
donatien 0:8e01dca41002 402 LWIP_ASSERT("conn->current_msg == NULL", conn->current_msg == NULL);
donatien 0:8e01dca41002 403 }
donatien 0:8e01dca41002 404 }
donatien 0:8e01dca41002 405
donatien 0:8e01dca41002 406 /**
donatien 0:8e01dca41002 407 * Setup a tcp_pcb with the correct callback function pointers
donatien 0:8e01dca41002 408 * and their arguments.
donatien 0:8e01dca41002 409 *
donatien 0:8e01dca41002 410 * @param conn the TCP netconn to setup
donatien 0:8e01dca41002 411 */
donatien 0:8e01dca41002 412 static void
donatien 0:8e01dca41002 413 setup_tcp(struct netconn *conn)
donatien 0:8e01dca41002 414 {
donatien 0:8e01dca41002 415 struct tcp_pcb *pcb;
donatien 0:8e01dca41002 416
donatien 0:8e01dca41002 417 pcb = conn->pcb.tcp;
donatien 0:8e01dca41002 418 tcp_arg(pcb, conn);
donatien 0:8e01dca41002 419 tcp_recv(pcb, recv_tcp);
donatien 0:8e01dca41002 420 tcp_sent(pcb, sent_tcp);
donatien 0:8e01dca41002 421 tcp_poll(pcb, poll_tcp, 4);
donatien 0:8e01dca41002 422 tcp_err(pcb, err_tcp);
donatien 0:8e01dca41002 423 }
donatien 0:8e01dca41002 424
donatien 0:8e01dca41002 425 /**
donatien 0:8e01dca41002 426 * Accept callback function for TCP netconns.
donatien 0:8e01dca41002 427 * Allocates a new netconn and posts that to conn->acceptmbox.
donatien 0:8e01dca41002 428 *
donatien 0:8e01dca41002 429 * @see tcp.h (struct tcp_pcb_listen.accept) for parameters and return value
donatien 0:8e01dca41002 430 */
donatien 0:8e01dca41002 431 static err_t
donatien 0:8e01dca41002 432 accept_function(void *arg, struct tcp_pcb *newpcb, err_t err)
donatien 0:8e01dca41002 433 {
donatien 0:8e01dca41002 434 struct netconn *newconn;
donatien 0:8e01dca41002 435 struct netconn *conn = (struct netconn *)arg;
donatien 0:8e01dca41002 436
donatien 0:8e01dca41002 437 LWIP_DEBUGF(API_MSG_DEBUG, ("accept_function: newpcb->tate: %s\n", tcp_debug_state_str(newpcb->state)));
donatien 0:8e01dca41002 438
donatien 0:8e01dca41002 439 if (!sys_mbox_valid(&conn->acceptmbox)) {
donatien 0:8e01dca41002 440 LWIP_DEBUGF(API_MSG_DEBUG, ("accept_function: acceptmbox already deleted\n"));
donatien 0:8e01dca41002 441 return ERR_VAL;
donatien 0:8e01dca41002 442 }
donatien 0:8e01dca41002 443
donatien 0:8e01dca41002 444 /* We have to set the callback here even though
donatien 0:8e01dca41002 445 * the new socket is unknown. conn->socket is marked as -1. */
donatien 0:8e01dca41002 446 newconn = netconn_alloc(conn->type, conn->callback);
donatien 0:8e01dca41002 447 if (newconn == NULL) {
donatien 0:8e01dca41002 448 return ERR_MEM;
donatien 0:8e01dca41002 449 }
donatien 0:8e01dca41002 450 newconn->pcb.tcp = newpcb;
donatien 0:8e01dca41002 451 setup_tcp(newconn);
donatien 0:8e01dca41002 452 /* no protection: when creating the pcb, the netconn is not yet known
donatien 0:8e01dca41002 453 to the application thread */
donatien 0:8e01dca41002 454 newconn->last_err = err;
donatien 0:8e01dca41002 455
donatien 0:8e01dca41002 456 if (sys_mbox_trypost(&conn->acceptmbox, newconn) != ERR_OK) {
donatien 0:8e01dca41002 457 /* When returning != ERR_OK, the pcb is aborted in tcp_process(),
donatien 0:8e01dca41002 458 so do nothing here! */
donatien 0:8e01dca41002 459 newconn->pcb.tcp = NULL;
donatien 0:8e01dca41002 460 /* no need to drain since we know the recvmbox is empty. */
donatien 0:8e01dca41002 461 sys_mbox_free(&newconn->recvmbox);
donatien 0:8e01dca41002 462 sys_mbox_set_invalid(&newconn->recvmbox);
donatien 0:8e01dca41002 463 netconn_free(newconn);
donatien 0:8e01dca41002 464 return ERR_MEM;
donatien 0:8e01dca41002 465 } else {
donatien 0:8e01dca41002 466 /* Register event with callback */
donatien 0:8e01dca41002 467 API_EVENT(conn, NETCONN_EVT_RCVPLUS, 0);
donatien 0:8e01dca41002 468 }
donatien 0:8e01dca41002 469
donatien 0:8e01dca41002 470 return ERR_OK;
donatien 0:8e01dca41002 471 }
donatien 0:8e01dca41002 472 #endif /* LWIP_TCP */
donatien 0:8e01dca41002 473
donatien 0:8e01dca41002 474 /**
donatien 0:8e01dca41002 475 * Create a new pcb of a specific type.
donatien 0:8e01dca41002 476 * Called from do_newconn().
donatien 0:8e01dca41002 477 *
donatien 0:8e01dca41002 478 * @param msg the api_msg_msg describing the connection type
donatien 0:8e01dca41002 479 * @return msg->conn->err, but the return value is currently ignored
donatien 0:8e01dca41002 480 */
donatien 0:8e01dca41002 481 static void
donatien 0:8e01dca41002 482 pcb_new(struct api_msg_msg *msg)
donatien 0:8e01dca41002 483 {
donatien 0:8e01dca41002 484 LWIP_ASSERT("pcb_new: pcb already allocated", msg->conn->pcb.tcp == NULL);
donatien 0:8e01dca41002 485
donatien 0:8e01dca41002 486 /* Allocate a PCB for this connection */
donatien 0:8e01dca41002 487 switch(NETCONNTYPE_GROUP(msg->conn->type)) {
donatien 0:8e01dca41002 488 #if LWIP_RAW
donatien 0:8e01dca41002 489 case NETCONN_RAW:
donatien 0:8e01dca41002 490 msg->conn->pcb.raw = raw_new(msg->msg.n.proto);
donatien 0:8e01dca41002 491 if(msg->conn->pcb.raw == NULL) {
donatien 0:8e01dca41002 492 msg->err = ERR_MEM;
donatien 0:8e01dca41002 493 break;
donatien 0:8e01dca41002 494 }
donatien 0:8e01dca41002 495 raw_recv(msg->conn->pcb.raw, recv_raw, msg->conn);
donatien 0:8e01dca41002 496 break;
donatien 0:8e01dca41002 497 #endif /* LWIP_RAW */
donatien 0:8e01dca41002 498 #if LWIP_UDP
donatien 0:8e01dca41002 499 case NETCONN_UDP:
donatien 0:8e01dca41002 500 msg->conn->pcb.udp = udp_new();
donatien 0:8e01dca41002 501 if(msg->conn->pcb.udp == NULL) {
donatien 0:8e01dca41002 502 msg->err = ERR_MEM;
donatien 0:8e01dca41002 503 break;
donatien 0:8e01dca41002 504 }
donatien 0:8e01dca41002 505 #if LWIP_UDPLITE
donatien 0:8e01dca41002 506 if (msg->conn->type==NETCONN_UDPLITE) {
donatien 0:8e01dca41002 507 udp_setflags(msg->conn->pcb.udp, UDP_FLAGS_UDPLITE);
donatien 0:8e01dca41002 508 }
donatien 0:8e01dca41002 509 #endif /* LWIP_UDPLITE */
donatien 0:8e01dca41002 510 if (msg->conn->type==NETCONN_UDPNOCHKSUM) {
donatien 0:8e01dca41002 511 udp_setflags(msg->conn->pcb.udp, UDP_FLAGS_NOCHKSUM);
donatien 0:8e01dca41002 512 }
donatien 0:8e01dca41002 513 udp_recv(msg->conn->pcb.udp, recv_udp, msg->conn);
donatien 0:8e01dca41002 514 break;
donatien 0:8e01dca41002 515 #endif /* LWIP_UDP */
donatien 0:8e01dca41002 516 #if LWIP_TCP
donatien 0:8e01dca41002 517 case NETCONN_TCP:
donatien 0:8e01dca41002 518 msg->conn->pcb.tcp = tcp_new();
donatien 0:8e01dca41002 519 if(msg->conn->pcb.tcp == NULL) {
donatien 0:8e01dca41002 520 msg->err = ERR_MEM;
donatien 0:8e01dca41002 521 break;
donatien 0:8e01dca41002 522 }
donatien 0:8e01dca41002 523 setup_tcp(msg->conn);
donatien 0:8e01dca41002 524 break;
donatien 0:8e01dca41002 525 #endif /* LWIP_TCP */
donatien 0:8e01dca41002 526 default:
donatien 0:8e01dca41002 527 /* Unsupported netconn type, e.g. protocol disabled */
donatien 0:8e01dca41002 528 msg->err = ERR_VAL;
donatien 0:8e01dca41002 529 break;
donatien 0:8e01dca41002 530 }
donatien 0:8e01dca41002 531 }
donatien 0:8e01dca41002 532
donatien 0:8e01dca41002 533 /**
donatien 0:8e01dca41002 534 * Create a new pcb of a specific type inside a netconn.
donatien 0:8e01dca41002 535 * Called from netconn_new_with_proto_and_callback.
donatien 0:8e01dca41002 536 *
donatien 0:8e01dca41002 537 * @param msg the api_msg_msg describing the connection type
donatien 0:8e01dca41002 538 */
donatien 0:8e01dca41002 539 void
donatien 0:8e01dca41002 540 do_newconn(struct api_msg_msg *msg)
donatien 0:8e01dca41002 541 {
donatien 0:8e01dca41002 542 msg->err = ERR_OK;
donatien 0:8e01dca41002 543 if(msg->conn->pcb.tcp == NULL) {
donatien 0:8e01dca41002 544 pcb_new(msg);
donatien 0:8e01dca41002 545 }
donatien 0:8e01dca41002 546 /* Else? This "new" connection already has a PCB allocated. */
donatien 0:8e01dca41002 547 /* Is this an error condition? Should it be deleted? */
donatien 0:8e01dca41002 548 /* We currently just are happy and return. */
donatien 0:8e01dca41002 549
donatien 0:8e01dca41002 550 TCPIP_APIMSG_ACK(msg);
donatien 0:8e01dca41002 551 }
donatien 0:8e01dca41002 552
donatien 0:8e01dca41002 553 /**
donatien 0:8e01dca41002 554 * Create a new netconn (of a specific type) that has a callback function.
donatien 0:8e01dca41002 555 * The corresponding pcb is NOT created!
donatien 0:8e01dca41002 556 *
donatien 0:8e01dca41002 557 * @param t the type of 'connection' to create (@see enum netconn_type)
donatien 0:8e01dca41002 558 * @param proto the IP protocol for RAW IP pcbs
donatien 0:8e01dca41002 559 * @param callback a function to call on status changes (RX available, TX'ed)
donatien 0:8e01dca41002 560 * @return a newly allocated struct netconn or
donatien 0:8e01dca41002 561 * NULL on memory error
donatien 0:8e01dca41002 562 */
donatien 0:8e01dca41002 563 struct netconn*
donatien 0:8e01dca41002 564 netconn_alloc(enum netconn_type t, netconn_callback callback)
donatien 0:8e01dca41002 565 {
donatien 0:8e01dca41002 566 struct netconn *conn;
donatien 0:8e01dca41002 567 int size = 0;
donatien 0:8e01dca41002 568
donatien 0:8e01dca41002 569 conn = (struct netconn *)memp_malloc(MEMP_NETCONN);
donatien 0:8e01dca41002 570 if (conn == NULL) {
donatien 0:8e01dca41002 571 return NULL;
donatien 0:8e01dca41002 572 }
donatien 0:8e01dca41002 573
donatien 0:8e01dca41002 574 conn->last_err = ERR_OK;
donatien 0:8e01dca41002 575 conn->type = t;
donatien 0:8e01dca41002 576 conn->pcb.tcp = NULL;
donatien 0:8e01dca41002 577
donatien 0:8e01dca41002 578 #if (DEFAULT_RAW_RECVMBOX_SIZE == DEFAULT_UDP_RECVMBOX_SIZE) && \
donatien 0:8e01dca41002 579 (DEFAULT_RAW_RECVMBOX_SIZE == DEFAULT_TCP_RECVMBOX_SIZE)
donatien 0:8e01dca41002 580 size = DEFAULT_RAW_RECVMBOX_SIZE;
donatien 0:8e01dca41002 581 #else
donatien 0:8e01dca41002 582 switch(NETCONNTYPE_GROUP(t)) {
donatien 0:8e01dca41002 583 #if LWIP_RAW
donatien 0:8e01dca41002 584 case NETCONN_RAW:
donatien 0:8e01dca41002 585 size = DEFAULT_RAW_RECVMBOX_SIZE;
donatien 0:8e01dca41002 586 break;
donatien 0:8e01dca41002 587 #endif /* LWIP_RAW */
donatien 0:8e01dca41002 588 #if LWIP_UDP
donatien 0:8e01dca41002 589 case NETCONN_UDP:
donatien 0:8e01dca41002 590 size = DEFAULT_UDP_RECVMBOX_SIZE;
donatien 0:8e01dca41002 591 break;
donatien 0:8e01dca41002 592 #endif /* LWIP_UDP */
donatien 0:8e01dca41002 593 #if LWIP_TCP
donatien 0:8e01dca41002 594 case NETCONN_TCP:
donatien 0:8e01dca41002 595 size = DEFAULT_TCP_RECVMBOX_SIZE;
donatien 0:8e01dca41002 596 break;
donatien 0:8e01dca41002 597 #endif /* LWIP_TCP */
donatien 0:8e01dca41002 598 default:
donatien 0:8e01dca41002 599 LWIP_ASSERT("netconn_alloc: undefined netconn_type", 0);
donatien 0:8e01dca41002 600 break;
donatien 0:8e01dca41002 601 }
donatien 0:8e01dca41002 602 #endif
donatien 0:8e01dca41002 603
donatien 0:8e01dca41002 604 if (sys_sem_new(&conn->op_completed, 0) != ERR_OK) {
donatien 0:8e01dca41002 605 memp_free(MEMP_NETCONN, conn);
donatien 0:8e01dca41002 606 return NULL;
donatien 0:8e01dca41002 607 }
donatien 0:8e01dca41002 608 if (sys_mbox_new(&conn->recvmbox, size) != ERR_OK) {
donatien 0:8e01dca41002 609 sys_sem_free(&conn->op_completed);
donatien 0:8e01dca41002 610 memp_free(MEMP_NETCONN, conn);
donatien 0:8e01dca41002 611 return NULL;
donatien 0:8e01dca41002 612 }
donatien 0:8e01dca41002 613
donatien 0:8e01dca41002 614 #if LWIP_TCP
donatien 0:8e01dca41002 615 sys_mbox_set_invalid(&conn->acceptmbox);
donatien 0:8e01dca41002 616 #endif
donatien 0:8e01dca41002 617 conn->state = NETCONN_NONE;
donatien 0:8e01dca41002 618 #if LWIP_SOCKET
donatien 0:8e01dca41002 619 /* initialize socket to -1 since 0 is a valid socket */
donatien 0:8e01dca41002 620 conn->socket = -1;
donatien 0:8e01dca41002 621 #endif /* LWIP_SOCKET */
donatien 0:8e01dca41002 622 conn->callback = callback;
donatien 0:8e01dca41002 623 #if LWIP_TCP
donatien 0:8e01dca41002 624 conn->current_msg = NULL;
donatien 0:8e01dca41002 625 conn->write_offset = 0;
donatien 0:8e01dca41002 626 #endif /* LWIP_TCP */
donatien 0:8e01dca41002 627 #if LWIP_SO_RCVTIMEO
donatien 0:8e01dca41002 628 conn->recv_timeout = 0;
donatien 0:8e01dca41002 629 #endif /* LWIP_SO_RCVTIMEO */
donatien 0:8e01dca41002 630 #if LWIP_SO_RCVBUF
donatien 0:8e01dca41002 631 conn->recv_bufsize = RECV_BUFSIZE_DEFAULT;
donatien 0:8e01dca41002 632 conn->recv_avail = 0;
donatien 0:8e01dca41002 633 #endif /* LWIP_SO_RCVBUF */
donatien 0:8e01dca41002 634 conn->flags = 0;
donatien 0:8e01dca41002 635 return conn;
donatien 0:8e01dca41002 636 }
donatien 0:8e01dca41002 637
donatien 0:8e01dca41002 638 /**
donatien 0:8e01dca41002 639 * Delete a netconn and all its resources.
donatien 0:8e01dca41002 640 * The pcb is NOT freed (since we might not be in the right thread context do this).
donatien 0:8e01dca41002 641 *
donatien 0:8e01dca41002 642 * @param conn the netconn to free
donatien 0:8e01dca41002 643 */
donatien 0:8e01dca41002 644 void
donatien 0:8e01dca41002 645 netconn_free(struct netconn *conn)
donatien 0:8e01dca41002 646 {
donatien 0:8e01dca41002 647 LWIP_ASSERT("PCB must be deallocated outside this function", conn->pcb.tcp == NULL);
donatien 0:8e01dca41002 648 LWIP_ASSERT("recvmbox must be deallocated before calling this function",
donatien 0:8e01dca41002 649 !sys_mbox_valid(&conn->recvmbox));
donatien 0:8e01dca41002 650 #if LWIP_TCP
donatien 0:8e01dca41002 651 LWIP_ASSERT("acceptmbox must be deallocated before calling this function",
donatien 0:8e01dca41002 652 !sys_mbox_valid(&conn->acceptmbox));
donatien 0:8e01dca41002 653 #endif /* LWIP_TCP */
donatien 0:8e01dca41002 654
donatien 0:8e01dca41002 655 sys_sem_free(&conn->op_completed);
donatien 0:8e01dca41002 656 sys_sem_set_invalid(&conn->op_completed);
donatien 0:8e01dca41002 657
donatien 0:8e01dca41002 658 memp_free(MEMP_NETCONN, conn);
donatien 0:8e01dca41002 659 }
donatien 0:8e01dca41002 660
donatien 0:8e01dca41002 661 /**
donatien 0:8e01dca41002 662 * Delete rcvmbox and acceptmbox of a netconn and free the left-over data in
donatien 0:8e01dca41002 663 * these mboxes
donatien 0:8e01dca41002 664 *
donatien 0:8e01dca41002 665 * @param conn the netconn to free
donatien 0:8e01dca41002 666 * @bytes_drained bytes drained from recvmbox
donatien 0:8e01dca41002 667 * @accepts_drained pending connections drained from acceptmbox
donatien 0:8e01dca41002 668 */
donatien 0:8e01dca41002 669 static void
donatien 0:8e01dca41002 670 netconn_drain(struct netconn *conn)
donatien 0:8e01dca41002 671 {
donatien 0:8e01dca41002 672 void *mem;
donatien 0:8e01dca41002 673 #if LWIP_TCP
donatien 0:8e01dca41002 674 struct pbuf *p;
donatien 0:8e01dca41002 675 #endif /* LWIP_TCP */
donatien 0:8e01dca41002 676
donatien 0:8e01dca41002 677 /* This runs in tcpip_thread, so we don't need to lock against rx packets */
donatien 0:8e01dca41002 678
donatien 0:8e01dca41002 679 /* Delete and drain the recvmbox. */
donatien 0:8e01dca41002 680 if (sys_mbox_valid(&conn->recvmbox)) {
donatien 0:8e01dca41002 681 while (sys_mbox_tryfetch(&conn->recvmbox, &mem) != SYS_MBOX_EMPTY) {
donatien 0:8e01dca41002 682 #if LWIP_TCP
donatien 0:8e01dca41002 683 if (conn->type == NETCONN_TCP) {
donatien 0:8e01dca41002 684 if(mem != NULL) {
donatien 0:8e01dca41002 685 p = (struct pbuf*)mem;
donatien 0:8e01dca41002 686 /* pcb might be set to NULL already by err_tcp() */
donatien 0:8e01dca41002 687 if (conn->pcb.tcp != NULL) {
donatien 0:8e01dca41002 688 tcp_recved(conn->pcb.tcp, p->tot_len);
donatien 0:8e01dca41002 689 }
donatien 0:8e01dca41002 690 pbuf_free(p);
donatien 0:8e01dca41002 691 }
donatien 0:8e01dca41002 692 } else
donatien 0:8e01dca41002 693 #endif /* LWIP_TCP */
donatien 0:8e01dca41002 694 {
donatien 0:8e01dca41002 695 netbuf_delete((struct netbuf *)mem);
donatien 0:8e01dca41002 696 }
donatien 0:8e01dca41002 697 }
donatien 0:8e01dca41002 698 sys_mbox_free(&conn->recvmbox);
donatien 0:8e01dca41002 699 sys_mbox_set_invalid(&conn->recvmbox);
donatien 0:8e01dca41002 700 }
donatien 0:8e01dca41002 701
donatien 0:8e01dca41002 702 /* Delete and drain the acceptmbox. */
donatien 0:8e01dca41002 703 #if LWIP_TCP
donatien 0:8e01dca41002 704 if (sys_mbox_valid(&conn->acceptmbox)) {
donatien 0:8e01dca41002 705 while (sys_mbox_tryfetch(&conn->acceptmbox, &mem) != SYS_MBOX_EMPTY) {
donatien 0:8e01dca41002 706 struct netconn *newconn = (struct netconn *)mem;
donatien 0:8e01dca41002 707 /* Only tcp pcbs have an acceptmbox, so no need to check conn->type */
donatien 0:8e01dca41002 708 /* pcb might be set to NULL already by err_tcp() */
donatien 0:8e01dca41002 709 if (conn->pcb.tcp != NULL) {
donatien 0:8e01dca41002 710 tcp_accepted(conn->pcb.tcp);
donatien 0:8e01dca41002 711 }
donatien 0:8e01dca41002 712 /* drain recvmbox */
donatien 0:8e01dca41002 713 netconn_drain(newconn);
donatien 0:8e01dca41002 714 if (newconn->pcb.tcp != NULL) {
donatien 0:8e01dca41002 715 tcp_abort(newconn->pcb.tcp);
donatien 0:8e01dca41002 716 newconn->pcb.tcp = NULL;
donatien 0:8e01dca41002 717 }
donatien 0:8e01dca41002 718 netconn_free(newconn);
donatien 0:8e01dca41002 719 }
donatien 0:8e01dca41002 720 sys_mbox_free(&conn->acceptmbox);
donatien 0:8e01dca41002 721 sys_mbox_set_invalid(&conn->acceptmbox);
donatien 0:8e01dca41002 722 }
donatien 0:8e01dca41002 723 #endif /* LWIP_TCP */
donatien 0:8e01dca41002 724 }
donatien 0:8e01dca41002 725
donatien 0:8e01dca41002 726 #if LWIP_TCP
donatien 0:8e01dca41002 727 /**
donatien 0:8e01dca41002 728 * Internal helper function to close a TCP netconn: since this sometimes
donatien 0:8e01dca41002 729 * doesn't work at the first attempt, this function is called from multiple
donatien 0:8e01dca41002 730 * places.
donatien 0:8e01dca41002 731 *
donatien 0:8e01dca41002 732 * @param conn the TCP netconn to close
donatien 0:8e01dca41002 733 */
donatien 0:8e01dca41002 734 static void
donatien 0:8e01dca41002 735 do_close_internal(struct netconn *conn)
donatien 0:8e01dca41002 736 {
donatien 0:8e01dca41002 737 err_t err;
donatien 0:8e01dca41002 738 u8_t shut, shut_rx, shut_tx, close;
donatien 0:8e01dca41002 739
donatien 0:8e01dca41002 740 LWIP_ASSERT("invalid conn", (conn != NULL));
donatien 0:8e01dca41002 741 LWIP_ASSERT("this is for tcp netconns only", (conn->type == NETCONN_TCP));
donatien 0:8e01dca41002 742 LWIP_ASSERT("conn must be in state NETCONN_CLOSE", (conn->state == NETCONN_CLOSE));
donatien 0:8e01dca41002 743 LWIP_ASSERT("pcb already closed", (conn->pcb.tcp != NULL));
donatien 0:8e01dca41002 744 LWIP_ASSERT("conn->current_msg != NULL", conn->current_msg != NULL);
donatien 0:8e01dca41002 745
donatien 0:8e01dca41002 746 shut = conn->current_msg->msg.sd.shut;
donatien 0:8e01dca41002 747 shut_rx = shut & NETCONN_SHUT_RD;
donatien 0:8e01dca41002 748 shut_tx = shut & NETCONN_SHUT_WR;
donatien 0:8e01dca41002 749 /* shutting down both ends is the same as closing */
donatien 0:8e01dca41002 750 close = shut == NETCONN_SHUT_RDWR;
donatien 0:8e01dca41002 751
donatien 0:8e01dca41002 752 /* Set back some callback pointers */
donatien 0:8e01dca41002 753 if (close) {
donatien 0:8e01dca41002 754 tcp_arg(conn->pcb.tcp, NULL);
donatien 0:8e01dca41002 755 }
donatien 0:8e01dca41002 756 if (conn->pcb.tcp->state == LISTEN) {
donatien 0:8e01dca41002 757 tcp_accept(conn->pcb.tcp, NULL);
donatien 0:8e01dca41002 758 } else {
donatien 0:8e01dca41002 759 /* some callbacks have to be reset if tcp_close is not successful */
donatien 0:8e01dca41002 760 if (shut_rx) {
donatien 0:8e01dca41002 761 tcp_recv(conn->pcb.tcp, NULL);
donatien 0:8e01dca41002 762 tcp_accept(conn->pcb.tcp, NULL);
donatien 0:8e01dca41002 763 }
donatien 0:8e01dca41002 764 if (shut_tx) {
donatien 0:8e01dca41002 765 tcp_sent(conn->pcb.tcp, NULL);
donatien 0:8e01dca41002 766 }
donatien 0:8e01dca41002 767 if (close) {
donatien 0:8e01dca41002 768 tcp_poll(conn->pcb.tcp, NULL, 4);
donatien 0:8e01dca41002 769 tcp_err(conn->pcb.tcp, NULL);
donatien 0:8e01dca41002 770 }
donatien 0:8e01dca41002 771 }
donatien 0:8e01dca41002 772 /* Try to close the connection */
donatien 0:8e01dca41002 773 if (shut == NETCONN_SHUT_RDWR) {
donatien 0:8e01dca41002 774 err = tcp_close(conn->pcb.tcp);
donatien 0:8e01dca41002 775 } else {
donatien 0:8e01dca41002 776 err = tcp_shutdown(conn->pcb.tcp, shut & NETCONN_SHUT_RD, shut & NETCONN_SHUT_WR);
donatien 0:8e01dca41002 777 }
donatien 0:8e01dca41002 778 if (err == ERR_OK) {
donatien 0:8e01dca41002 779 /* Closing succeeded */
donatien 0:8e01dca41002 780 conn->current_msg->err = ERR_OK;
donatien 0:8e01dca41002 781 conn->current_msg = NULL;
donatien 0:8e01dca41002 782 conn->state = NETCONN_NONE;
donatien 0:8e01dca41002 783 /* Set back some callback pointers as conn is going away */
donatien 0:8e01dca41002 784 conn->pcb.tcp = NULL;
donatien 0:8e01dca41002 785 /* Trigger select() in socket layer. Make sure everybody notices activity
donatien 0:8e01dca41002 786 on the connection, error first! */
donatien 0:8e01dca41002 787 if (close) {
donatien 0:8e01dca41002 788 API_EVENT(conn, NETCONN_EVT_ERROR, 0);
donatien 0:8e01dca41002 789 }
donatien 0:8e01dca41002 790 if (shut_rx) {
donatien 0:8e01dca41002 791 API_EVENT(conn, NETCONN_EVT_RCVPLUS, 0);
donatien 0:8e01dca41002 792 }
donatien 0:8e01dca41002 793 if (shut_tx) {
donatien 0:8e01dca41002 794 API_EVENT(conn, NETCONN_EVT_SENDPLUS, 0);
donatien 0:8e01dca41002 795 }
donatien 0:8e01dca41002 796 /* wake up the application task */
donatien 0:8e01dca41002 797 sys_sem_signal(&conn->op_completed);
donatien 0:8e01dca41002 798 } else {
donatien 0:8e01dca41002 799 /* Closing failed, restore some of the callbacks */
donatien 0:8e01dca41002 800 /* Closing of listen pcb will never fail! */
donatien 0:8e01dca41002 801 LWIP_ASSERT("Closing a listen pcb may not fail!", (conn->pcb.tcp->state != LISTEN));
donatien 0:8e01dca41002 802 tcp_sent(conn->pcb.tcp, sent_tcp);
donatien 0:8e01dca41002 803 tcp_poll(conn->pcb.tcp, poll_tcp, 4);
donatien 0:8e01dca41002 804 tcp_err(conn->pcb.tcp, err_tcp);
donatien 0:8e01dca41002 805 tcp_arg(conn->pcb.tcp, conn);
donatien 0:8e01dca41002 806 /* don't restore recv callback: we don't want to receive any more data */
donatien 0:8e01dca41002 807 }
donatien 0:8e01dca41002 808 /* If closing didn't succeed, we get called again either
donatien 0:8e01dca41002 809 from poll_tcp or from sent_tcp */
donatien 0:8e01dca41002 810 }
donatien 0:8e01dca41002 811 #endif /* LWIP_TCP */
donatien 0:8e01dca41002 812
donatien 0:8e01dca41002 813 /**
donatien 0:8e01dca41002 814 * Delete the pcb inside a netconn.
donatien 0:8e01dca41002 815 * Called from netconn_delete.
donatien 0:8e01dca41002 816 *
donatien 0:8e01dca41002 817 * @param msg the api_msg_msg pointing to the connection
donatien 0:8e01dca41002 818 */
donatien 0:8e01dca41002 819 void
donatien 0:8e01dca41002 820 do_delconn(struct api_msg_msg *msg)
donatien 0:8e01dca41002 821 {
donatien 0:8e01dca41002 822 /* @todo TCP: abort running write/connect? */
donatien 0:8e01dca41002 823 if ((msg->conn->state != NETCONN_NONE) &&
donatien 0:8e01dca41002 824 (msg->conn->state != NETCONN_LISTEN) &&
donatien 0:8e01dca41002 825 (msg->conn->state != NETCONN_CONNECT)) {
donatien 0:8e01dca41002 826 /* this only happens for TCP netconns */
donatien 0:8e01dca41002 827 LWIP_ASSERT("msg->conn->type == NETCONN_TCP", msg->conn->type == NETCONN_TCP);
donatien 0:8e01dca41002 828 msg->err = ERR_INPROGRESS;
donatien 0:8e01dca41002 829 } else {
donatien 0:8e01dca41002 830 LWIP_ASSERT("blocking connect in progress",
donatien 0:8e01dca41002 831 (msg->conn->state != NETCONN_CONNECT) || IN_NONBLOCKING_CONNECT(msg->conn));
donatien 0:8e01dca41002 832 /* Drain and delete mboxes */
donatien 0:8e01dca41002 833 netconn_drain(msg->conn);
donatien 0:8e01dca41002 834
donatien 0:8e01dca41002 835 if (msg->conn->pcb.tcp != NULL) {
donatien 0:8e01dca41002 836
donatien 0:8e01dca41002 837 switch (NETCONNTYPE_GROUP(msg->conn->type)) {
donatien 0:8e01dca41002 838 #if LWIP_RAW
donatien 0:8e01dca41002 839 case NETCONN_RAW:
donatien 0:8e01dca41002 840 raw_remove(msg->conn->pcb.raw);
donatien 0:8e01dca41002 841 break;
donatien 0:8e01dca41002 842 #endif /* LWIP_RAW */
donatien 0:8e01dca41002 843 #if LWIP_UDP
donatien 0:8e01dca41002 844 case NETCONN_UDP:
donatien 0:8e01dca41002 845 msg->conn->pcb.udp->recv_arg = NULL;
donatien 0:8e01dca41002 846 udp_remove(msg->conn->pcb.udp);
donatien 0:8e01dca41002 847 break;
donatien 0:8e01dca41002 848 #endif /* LWIP_UDP */
donatien 0:8e01dca41002 849 #if LWIP_TCP
donatien 0:8e01dca41002 850 case NETCONN_TCP:
donatien 0:8e01dca41002 851 LWIP_ASSERT("already writing or closing", msg->conn->current_msg == NULL &&
donatien 0:8e01dca41002 852 msg->conn->write_offset == 0);
donatien 0:8e01dca41002 853 msg->conn->state = NETCONN_CLOSE;
donatien 0:8e01dca41002 854 msg->msg.sd.shut = NETCONN_SHUT_RDWR;
donatien 0:8e01dca41002 855 msg->conn->current_msg = msg;
donatien 0:8e01dca41002 856 do_close_internal(msg->conn);
donatien 0:8e01dca41002 857 /* API_EVENT is called inside do_close_internal, before releasing
donatien 0:8e01dca41002 858 the application thread, so we can return at this point! */
donatien 0:8e01dca41002 859 return;
donatien 0:8e01dca41002 860 #endif /* LWIP_TCP */
donatien 0:8e01dca41002 861 default:
donatien 0:8e01dca41002 862 break;
donatien 0:8e01dca41002 863 }
donatien 0:8e01dca41002 864 msg->conn->pcb.tcp = NULL;
donatien 0:8e01dca41002 865 }
donatien 0:8e01dca41002 866 /* tcp netconns don't come here! */
donatien 0:8e01dca41002 867
donatien 0:8e01dca41002 868 /* @todo: this lets select make the socket readable and writable,
donatien 0:8e01dca41002 869 which is wrong! errfd instead? */
donatien 0:8e01dca41002 870 API_EVENT(msg->conn, NETCONN_EVT_RCVPLUS, 0);
donatien 0:8e01dca41002 871 API_EVENT(msg->conn, NETCONN_EVT_SENDPLUS, 0);
donatien 0:8e01dca41002 872 }
donatien 0:8e01dca41002 873 if (sys_sem_valid(&msg->conn->op_completed)) {
donatien 0:8e01dca41002 874 sys_sem_signal(&msg->conn->op_completed);
donatien 0:8e01dca41002 875 }
donatien 0:8e01dca41002 876 }
donatien 0:8e01dca41002 877
donatien 0:8e01dca41002 878 /**
donatien 0:8e01dca41002 879 * Bind a pcb contained in a netconn
donatien 0:8e01dca41002 880 * Called from netconn_bind.
donatien 0:8e01dca41002 881 *
donatien 0:8e01dca41002 882 * @param msg the api_msg_msg pointing to the connection and containing
donatien 0:8e01dca41002 883 * the IP address and port to bind to
donatien 0:8e01dca41002 884 */
donatien 0:8e01dca41002 885 void
donatien 0:8e01dca41002 886 do_bind(struct api_msg_msg *msg)
donatien 0:8e01dca41002 887 {
donatien 0:8e01dca41002 888 if (ERR_IS_FATAL(msg->conn->last_err)) {
donatien 0:8e01dca41002 889 msg->err = msg->conn->last_err;
donatien 0:8e01dca41002 890 } else {
donatien 0:8e01dca41002 891 msg->err = ERR_VAL;
donatien 0:8e01dca41002 892 if (msg->conn->pcb.tcp != NULL) {
donatien 0:8e01dca41002 893 switch (NETCONNTYPE_GROUP(msg->conn->type)) {
donatien 0:8e01dca41002 894 #if LWIP_RAW
donatien 0:8e01dca41002 895 case NETCONN_RAW:
donatien 0:8e01dca41002 896 msg->err = raw_bind(msg->conn->pcb.raw, msg->msg.bc.ipaddr);
donatien 0:8e01dca41002 897 break;
donatien 0:8e01dca41002 898 #endif /* LWIP_RAW */
donatien 0:8e01dca41002 899 #if LWIP_UDP
donatien 0:8e01dca41002 900 case NETCONN_UDP:
donatien 0:8e01dca41002 901 msg->err = udp_bind(msg->conn->pcb.udp, msg->msg.bc.ipaddr, msg->msg.bc.port);
donatien 0:8e01dca41002 902 break;
donatien 0:8e01dca41002 903 #endif /* LWIP_UDP */
donatien 0:8e01dca41002 904 #if LWIP_TCP
donatien 0:8e01dca41002 905 case NETCONN_TCP:
donatien 0:8e01dca41002 906 msg->err = tcp_bind(msg->conn->pcb.tcp, msg->msg.bc.ipaddr, msg->msg.bc.port);
donatien 0:8e01dca41002 907 break;
donatien 0:8e01dca41002 908 #endif /* LWIP_TCP */
donatien 0:8e01dca41002 909 default:
donatien 0:8e01dca41002 910 break;
donatien 0:8e01dca41002 911 }
donatien 0:8e01dca41002 912 }
donatien 0:8e01dca41002 913 }
donatien 0:8e01dca41002 914 TCPIP_APIMSG_ACK(msg);
donatien 0:8e01dca41002 915 }
donatien 0:8e01dca41002 916
donatien 0:8e01dca41002 917 #if LWIP_TCP
donatien 0:8e01dca41002 918 /**
donatien 0:8e01dca41002 919 * TCP callback function if a connection (opened by tcp_connect/do_connect) has
donatien 0:8e01dca41002 920 * been established (or reset by the remote host).
donatien 0:8e01dca41002 921 *
donatien 0:8e01dca41002 922 * @see tcp.h (struct tcp_pcb.connected) for parameters and return values
donatien 0:8e01dca41002 923 */
donatien 0:8e01dca41002 924 static err_t
donatien 0:8e01dca41002 925 do_connected(void *arg, struct tcp_pcb *pcb, err_t err)
donatien 0:8e01dca41002 926 {
donatien 0:8e01dca41002 927 struct netconn *conn;
donatien 0:8e01dca41002 928 int was_blocking;
donatien 0:8e01dca41002 929
donatien 0:8e01dca41002 930 LWIP_UNUSED_ARG(pcb);
donatien 0:8e01dca41002 931
donatien 0:8e01dca41002 932 conn = (struct netconn *)arg;
donatien 0:8e01dca41002 933
donatien 0:8e01dca41002 934 if (conn == NULL) {
donatien 0:8e01dca41002 935 return ERR_VAL;
donatien 0:8e01dca41002 936 }
donatien 0:8e01dca41002 937
donatien 0:8e01dca41002 938 LWIP_ASSERT("conn->state == NETCONN_CONNECT", conn->state == NETCONN_CONNECT);
donatien 0:8e01dca41002 939 LWIP_ASSERT("(conn->current_msg != NULL) || conn->in_non_blocking_connect",
donatien 0:8e01dca41002 940 (conn->current_msg != NULL) || IN_NONBLOCKING_CONNECT(conn));
donatien 0:8e01dca41002 941
donatien 0:8e01dca41002 942 if (conn->current_msg != NULL) {
donatien 0:8e01dca41002 943 conn->current_msg->err = err;
donatien 0:8e01dca41002 944 }
donatien 0:8e01dca41002 945 if ((conn->type == NETCONN_TCP) && (err == ERR_OK)) {
donatien 0:8e01dca41002 946 setup_tcp(conn);
donatien 0:8e01dca41002 947 }
donatien 0:8e01dca41002 948 was_blocking = !IN_NONBLOCKING_CONNECT(conn);
donatien 0:8e01dca41002 949 SET_NONBLOCKING_CONNECT(conn, 0);
donatien 0:8e01dca41002 950 conn->current_msg = NULL;
donatien 0:8e01dca41002 951 conn->state = NETCONN_NONE;
donatien 0:8e01dca41002 952 if (!was_blocking) {
donatien 0:8e01dca41002 953 NETCONN_SET_SAFE_ERR(conn, ERR_OK);
donatien 0:8e01dca41002 954 }
donatien 0:8e01dca41002 955 API_EVENT(conn, NETCONN_EVT_SENDPLUS, 0);
donatien 0:8e01dca41002 956
donatien 0:8e01dca41002 957 if (was_blocking) {
donatien 0:8e01dca41002 958 sys_sem_signal(&conn->op_completed);
donatien 0:8e01dca41002 959 }
donatien 0:8e01dca41002 960 return ERR_OK;
donatien 0:8e01dca41002 961 }
donatien 0:8e01dca41002 962 #endif /* LWIP_TCP */
donatien 0:8e01dca41002 963
donatien 0:8e01dca41002 964 /**
donatien 0:8e01dca41002 965 * Connect a pcb contained inside a netconn
donatien 0:8e01dca41002 966 * Called from netconn_connect.
donatien 0:8e01dca41002 967 *
donatien 0:8e01dca41002 968 * @param msg the api_msg_msg pointing to the connection and containing
donatien 0:8e01dca41002 969 * the IP address and port to connect to
donatien 0:8e01dca41002 970 */
donatien 0:8e01dca41002 971 void
donatien 0:8e01dca41002 972 do_connect(struct api_msg_msg *msg)
donatien 0:8e01dca41002 973 {
donatien 0:8e01dca41002 974 if (msg->conn->pcb.tcp == NULL) {
donatien 0:8e01dca41002 975 /* This may happen when calling netconn_connect() a second time */
donatien 0:8e01dca41002 976 msg->err = ERR_CLSD;
donatien 0:8e01dca41002 977 } else {
donatien 0:8e01dca41002 978 switch (NETCONNTYPE_GROUP(msg->conn->type)) {
donatien 0:8e01dca41002 979 #if LWIP_RAW
donatien 0:8e01dca41002 980 case NETCONN_RAW:
donatien 0:8e01dca41002 981 msg->err = raw_connect(msg->conn->pcb.raw, msg->msg.bc.ipaddr);
donatien 0:8e01dca41002 982 break;
donatien 0:8e01dca41002 983 #endif /* LWIP_RAW */
donatien 0:8e01dca41002 984 #if LWIP_UDP
donatien 0:8e01dca41002 985 case NETCONN_UDP:
donatien 0:8e01dca41002 986 msg->err = udp_connect(msg->conn->pcb.udp, msg->msg.bc.ipaddr, msg->msg.bc.port);
donatien 0:8e01dca41002 987 break;
donatien 0:8e01dca41002 988 #endif /* LWIP_UDP */
donatien 0:8e01dca41002 989 #if LWIP_TCP
donatien 0:8e01dca41002 990 case NETCONN_TCP:
donatien 0:8e01dca41002 991 /* Prevent connect while doing any other action. */
donatien 0:8e01dca41002 992 if (msg->conn->state != NETCONN_NONE) {
donatien 0:8e01dca41002 993 msg->err = ERR_ISCONN;
donatien 0:8e01dca41002 994 } else {
donatien 0:8e01dca41002 995 setup_tcp(msg->conn);
donatien 0:8e01dca41002 996 msg->err = tcp_connect(msg->conn->pcb.tcp, msg->msg.bc.ipaddr,
donatien 0:8e01dca41002 997 msg->msg.bc.port, do_connected);
donatien 0:8e01dca41002 998 if (msg->err == ERR_OK) {
donatien 0:8e01dca41002 999 u8_t non_blocking = netconn_is_nonblocking(msg->conn);
donatien 0:8e01dca41002 1000 msg->conn->state = NETCONN_CONNECT;
donatien 0:8e01dca41002 1001 SET_NONBLOCKING_CONNECT(msg->conn, non_blocking);
donatien 0:8e01dca41002 1002 if (non_blocking) {
donatien 0:8e01dca41002 1003 msg->err = ERR_INPROGRESS;
donatien 0:8e01dca41002 1004 } else {
donatien 0:8e01dca41002 1005 msg->conn->current_msg = msg;
donatien 0:8e01dca41002 1006 /* sys_sem_signal() is called from do_connected (or err_tcp()),
donatien 0:8e01dca41002 1007 * when the connection is established! */
donatien 0:8e01dca41002 1008 return;
donatien 0:8e01dca41002 1009 }
donatien 0:8e01dca41002 1010 }
donatien 0:8e01dca41002 1011 }
donatien 0:8e01dca41002 1012 break;
donatien 0:8e01dca41002 1013 #endif /* LWIP_TCP */
donatien 0:8e01dca41002 1014 default:
donatien 0:8e01dca41002 1015 LWIP_ERROR("Invalid netconn type", 0, do{ msg->err = ERR_VAL; }while(0));
donatien 0:8e01dca41002 1016 break;
donatien 0:8e01dca41002 1017 }
donatien 0:8e01dca41002 1018 }
donatien 0:8e01dca41002 1019 sys_sem_signal(&msg->conn->op_completed);
donatien 0:8e01dca41002 1020 }
donatien 0:8e01dca41002 1021
donatien 0:8e01dca41002 1022 /**
donatien 0:8e01dca41002 1023 * Connect a pcb contained inside a netconn
donatien 0:8e01dca41002 1024 * Only used for UDP netconns.
donatien 0:8e01dca41002 1025 * Called from netconn_disconnect.
donatien 0:8e01dca41002 1026 *
donatien 0:8e01dca41002 1027 * @param msg the api_msg_msg pointing to the connection to disconnect
donatien 0:8e01dca41002 1028 */
donatien 0:8e01dca41002 1029 void
donatien 0:8e01dca41002 1030 do_disconnect(struct api_msg_msg *msg)
donatien 0:8e01dca41002 1031 {
donatien 0:8e01dca41002 1032 #if LWIP_UDP
donatien 0:8e01dca41002 1033 if (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_UDP) {
donatien 0:8e01dca41002 1034 udp_disconnect(msg->conn->pcb.udp);
donatien 0:8e01dca41002 1035 msg->err = ERR_OK;
donatien 0:8e01dca41002 1036 } else
donatien 0:8e01dca41002 1037 #endif /* LWIP_UDP */
donatien 0:8e01dca41002 1038 {
donatien 0:8e01dca41002 1039 msg->err = ERR_VAL;
donatien 0:8e01dca41002 1040 }
donatien 0:8e01dca41002 1041 TCPIP_APIMSG_ACK(msg);
donatien 0:8e01dca41002 1042 }
donatien 0:8e01dca41002 1043
donatien 0:8e01dca41002 1044 #if LWIP_TCP
donatien 0:8e01dca41002 1045 /**
donatien 0:8e01dca41002 1046 * Set a TCP pcb contained in a netconn into listen mode
donatien 0:8e01dca41002 1047 * Called from netconn_listen.
donatien 0:8e01dca41002 1048 *
donatien 0:8e01dca41002 1049 * @param msg the api_msg_msg pointing to the connection
donatien 0:8e01dca41002 1050 */
donatien 0:8e01dca41002 1051 void
donatien 0:8e01dca41002 1052 do_listen(struct api_msg_msg *msg)
donatien 0:8e01dca41002 1053 {
donatien 0:8e01dca41002 1054 if (ERR_IS_FATAL(msg->conn->last_err)) {
donatien 0:8e01dca41002 1055 msg->err = msg->conn->last_err;
donatien 0:8e01dca41002 1056 } else {
donatien 0:8e01dca41002 1057 msg->err = ERR_CONN;
donatien 0:8e01dca41002 1058 if (msg->conn->pcb.tcp != NULL) {
donatien 0:8e01dca41002 1059 if (msg->conn->type == NETCONN_TCP) {
donatien 0:8e01dca41002 1060 if (msg->conn->state == NETCONN_NONE) {
donatien 0:8e01dca41002 1061 #if TCP_LISTEN_BACKLOG
donatien 0:8e01dca41002 1062 struct tcp_pcb* lpcb = tcp_listen_with_backlog(msg->conn->pcb.tcp, msg->msg.lb.backlog);
donatien 0:8e01dca41002 1063 #else /* TCP_LISTEN_BACKLOG */
donatien 0:8e01dca41002 1064 struct tcp_pcb* lpcb = tcp_listen(msg->conn->pcb.tcp);
donatien 0:8e01dca41002 1065 #endif /* TCP_LISTEN_BACKLOG */
donatien 0:8e01dca41002 1066 if (lpcb == NULL) {
donatien 0:8e01dca41002 1067 /* in this case, the old pcb is still allocated */
donatien 0:8e01dca41002 1068 msg->err = ERR_MEM;
donatien 0:8e01dca41002 1069 } else {
donatien 0:8e01dca41002 1070 /* delete the recvmbox and allocate the acceptmbox */
donatien 0:8e01dca41002 1071 if (sys_mbox_valid(&msg->conn->recvmbox)) {
donatien 0:8e01dca41002 1072 /** @todo: should we drain the recvmbox here? */
donatien 0:8e01dca41002 1073 sys_mbox_free(&msg->conn->recvmbox);
donatien 0:8e01dca41002 1074 sys_mbox_set_invalid(&msg->conn->recvmbox);
donatien 0:8e01dca41002 1075 }
donatien 0:8e01dca41002 1076 msg->err = ERR_OK;
donatien 0:8e01dca41002 1077 if (!sys_mbox_valid(&msg->conn->acceptmbox)) {
donatien 0:8e01dca41002 1078 msg->err = sys_mbox_new(&msg->conn->acceptmbox, DEFAULT_ACCEPTMBOX_SIZE);
donatien 0:8e01dca41002 1079 }
donatien 0:8e01dca41002 1080 if (msg->err == ERR_OK) {
donatien 0:8e01dca41002 1081 msg->conn->state = NETCONN_LISTEN;
donatien 0:8e01dca41002 1082 msg->conn->pcb.tcp = lpcb;
donatien 0:8e01dca41002 1083 tcp_arg(msg->conn->pcb.tcp, msg->conn);
donatien 0:8e01dca41002 1084 tcp_accept(msg->conn->pcb.tcp, accept_function);
donatien 0:8e01dca41002 1085 } else {
donatien 0:8e01dca41002 1086 /* since the old pcb is already deallocated, free lpcb now */
donatien 0:8e01dca41002 1087 tcp_close(lpcb);
donatien 0:8e01dca41002 1088 msg->conn->pcb.tcp = NULL;
donatien 0:8e01dca41002 1089 }
donatien 0:8e01dca41002 1090 }
donatien 0:8e01dca41002 1091 }
donatien 0:8e01dca41002 1092 }
donatien 0:8e01dca41002 1093 }
donatien 0:8e01dca41002 1094 }
donatien 0:8e01dca41002 1095 TCPIP_APIMSG_ACK(msg);
donatien 0:8e01dca41002 1096 }
donatien 0:8e01dca41002 1097 #endif /* LWIP_TCP */
donatien 0:8e01dca41002 1098
donatien 0:8e01dca41002 1099 /**
donatien 0:8e01dca41002 1100 * Send some data on a RAW or UDP pcb contained in a netconn
donatien 0:8e01dca41002 1101 * Called from netconn_send
donatien 0:8e01dca41002 1102 *
donatien 0:8e01dca41002 1103 * @param msg the api_msg_msg pointing to the connection
donatien 0:8e01dca41002 1104 */
donatien 0:8e01dca41002 1105 void
donatien 0:8e01dca41002 1106 do_send(struct api_msg_msg *msg)
donatien 0:8e01dca41002 1107 {
donatien 0:8e01dca41002 1108 if (ERR_IS_FATAL(msg->conn->last_err)) {
donatien 0:8e01dca41002 1109 msg->err = msg->conn->last_err;
donatien 0:8e01dca41002 1110 } else {
donatien 0:8e01dca41002 1111 msg->err = ERR_CONN;
donatien 0:8e01dca41002 1112 if (msg->conn->pcb.tcp != NULL) {
donatien 0:8e01dca41002 1113 switch (NETCONNTYPE_GROUP(msg->conn->type)) {
donatien 0:8e01dca41002 1114 #if LWIP_RAW
donatien 0:8e01dca41002 1115 case NETCONN_RAW:
donatien 0:8e01dca41002 1116 if (ip_addr_isany(&msg->msg.b->addr)) {
donatien 0:8e01dca41002 1117 msg->err = raw_send(msg->conn->pcb.raw, msg->msg.b->p);
donatien 0:8e01dca41002 1118 } else {
donatien 0:8e01dca41002 1119 msg->err = raw_sendto(msg->conn->pcb.raw, msg->msg.b->p, &msg->msg.b->addr);
donatien 0:8e01dca41002 1120 }
donatien 0:8e01dca41002 1121 break;
donatien 0:8e01dca41002 1122 #endif
donatien 0:8e01dca41002 1123 #if LWIP_UDP
donatien 0:8e01dca41002 1124 case NETCONN_UDP:
donatien 0:8e01dca41002 1125 #if LWIP_CHECKSUM_ON_COPY
donatien 0:8e01dca41002 1126 if (ip_addr_isany(&msg->msg.b->addr)) {
donatien 0:8e01dca41002 1127 msg->err = udp_send_chksum(msg->conn->pcb.udp, msg->msg.b->p,
donatien 0:8e01dca41002 1128 msg->msg.b->flags & NETBUF_FLAG_CHKSUM, msg->msg.b->toport_chksum);
donatien 0:8e01dca41002 1129 } else {
donatien 0:8e01dca41002 1130 msg->err = udp_sendto_chksum(msg->conn->pcb.udp, msg->msg.b->p,
donatien 0:8e01dca41002 1131 &msg->msg.b->addr, msg->msg.b->port,
donatien 0:8e01dca41002 1132 msg->msg.b->flags & NETBUF_FLAG_CHKSUM, msg->msg.b->toport_chksum);
donatien 0:8e01dca41002 1133 }
donatien 0:8e01dca41002 1134 #else /* LWIP_CHECKSUM_ON_COPY */
donatien 0:8e01dca41002 1135 if (ip_addr_isany(&msg->msg.b->addr)) {
donatien 0:8e01dca41002 1136 msg->err = udp_send(msg->conn->pcb.udp, msg->msg.b->p);
donatien 0:8e01dca41002 1137 } else {
donatien 0:8e01dca41002 1138 msg->err = udp_sendto(msg->conn->pcb.udp, msg->msg.b->p, &msg->msg.b->addr, msg->msg.b->port);
donatien 0:8e01dca41002 1139 }
donatien 0:8e01dca41002 1140 #endif /* LWIP_CHECKSUM_ON_COPY */
donatien 0:8e01dca41002 1141 break;
donatien 0:8e01dca41002 1142 #endif /* LWIP_UDP */
donatien 0:8e01dca41002 1143 default:
donatien 0:8e01dca41002 1144 break;
donatien 0:8e01dca41002 1145 }
donatien 0:8e01dca41002 1146 }
donatien 0:8e01dca41002 1147 }
donatien 0:8e01dca41002 1148 TCPIP_APIMSG_ACK(msg);
donatien 0:8e01dca41002 1149 }
donatien 0:8e01dca41002 1150
donatien 0:8e01dca41002 1151 #if LWIP_TCP
donatien 0:8e01dca41002 1152 /**
donatien 0:8e01dca41002 1153 * Indicate data has been received from a TCP pcb contained in a netconn
donatien 0:8e01dca41002 1154 * Called from netconn_recv
donatien 0:8e01dca41002 1155 *
donatien 0:8e01dca41002 1156 * @param msg the api_msg_msg pointing to the connection
donatien 0:8e01dca41002 1157 */
donatien 0:8e01dca41002 1158 void
donatien 0:8e01dca41002 1159 do_recv(struct api_msg_msg *msg)
donatien 0:8e01dca41002 1160 {
donatien 0:8e01dca41002 1161 msg->err = ERR_OK;
donatien 0:8e01dca41002 1162 if (msg->conn->pcb.tcp != NULL) {
donatien 0:8e01dca41002 1163 if (msg->conn->type == NETCONN_TCP) {
donatien 0:8e01dca41002 1164 #if TCP_LISTEN_BACKLOG
donatien 0:8e01dca41002 1165 if (msg->conn->pcb.tcp->state == LISTEN) {
donatien 0:8e01dca41002 1166 tcp_accepted(msg->conn->pcb.tcp);
donatien 0:8e01dca41002 1167 } else
donatien 0:8e01dca41002 1168 #endif /* TCP_LISTEN_BACKLOG */
donatien 0:8e01dca41002 1169 {
donatien 0:8e01dca41002 1170 u32_t remaining = msg->msg.r.len;
donatien 0:8e01dca41002 1171 do {
donatien 0:8e01dca41002 1172 u16_t recved = (remaining > 0xffff) ? 0xffff : (u16_t)remaining;
donatien 0:8e01dca41002 1173 tcp_recved(msg->conn->pcb.tcp, recved);
donatien 0:8e01dca41002 1174 remaining -= recved;
donatien 0:8e01dca41002 1175 }while(remaining != 0);
donatien 0:8e01dca41002 1176 }
donatien 0:8e01dca41002 1177 }
donatien 0:8e01dca41002 1178 }
donatien 0:8e01dca41002 1179 TCPIP_APIMSG_ACK(msg);
donatien 0:8e01dca41002 1180 }
donatien 0:8e01dca41002 1181
donatien 0:8e01dca41002 1182 /**
donatien 0:8e01dca41002 1183 * See if more data needs to be written from a previous call to netconn_write.
donatien 0:8e01dca41002 1184 * Called initially from do_write. If the first call can't send all data
donatien 0:8e01dca41002 1185 * (because of low memory or empty send-buffer), this function is called again
donatien 0:8e01dca41002 1186 * from sent_tcp() or poll_tcp() to send more data. If all data is sent, the
donatien 0:8e01dca41002 1187 * blocking application thread (waiting in netconn_write) is released.
donatien 0:8e01dca41002 1188 *
donatien 0:8e01dca41002 1189 * @param conn netconn (that is currently in state NETCONN_WRITE) to process
donatien 0:8e01dca41002 1190 * @return ERR_OK
donatien 0:8e01dca41002 1191 * ERR_MEM if LWIP_TCPIP_CORE_LOCKING=1 and sending hasn't yet finished
donatien 0:8e01dca41002 1192 */
donatien 0:8e01dca41002 1193 static err_t
donatien 0:8e01dca41002 1194 do_writemore(struct netconn *conn)
donatien 0:8e01dca41002 1195 {
donatien 0:8e01dca41002 1196 err_t err = ERR_OK;
donatien 0:8e01dca41002 1197 void *dataptr;
donatien 0:8e01dca41002 1198 u16_t len, available;
donatien 0:8e01dca41002 1199 u8_t write_finished = 0;
donatien 0:8e01dca41002 1200 size_t diff;
donatien 0:8e01dca41002 1201 u8_t dontblock = netconn_is_nonblocking(conn) ||
donatien 0:8e01dca41002 1202 (conn->current_msg->msg.w.apiflags & NETCONN_DONTBLOCK);
donatien 0:8e01dca41002 1203 u8_t apiflags = conn->current_msg->msg.w.apiflags;
donatien 0:8e01dca41002 1204
donatien 0:8e01dca41002 1205 LWIP_ASSERT("conn != NULL", conn != NULL);
donatien 0:8e01dca41002 1206 LWIP_ASSERT("conn->state == NETCONN_WRITE", (conn->state == NETCONN_WRITE));
donatien 0:8e01dca41002 1207 LWIP_ASSERT("conn->current_msg != NULL", conn->current_msg != NULL);
donatien 0:8e01dca41002 1208 LWIP_ASSERT("conn->pcb.tcp != NULL", conn->pcb.tcp != NULL);
donatien 0:8e01dca41002 1209 LWIP_ASSERT("conn->write_offset < conn->current_msg->msg.w.len",
donatien 0:8e01dca41002 1210 conn->write_offset < conn->current_msg->msg.w.len);
donatien 0:8e01dca41002 1211
donatien 0:8e01dca41002 1212 dataptr = (u8_t*)conn->current_msg->msg.w.dataptr + conn->write_offset;
donatien 0:8e01dca41002 1213 diff = conn->current_msg->msg.w.len - conn->write_offset;
donatien 0:8e01dca41002 1214 if (diff > 0xffffUL) { /* max_u16_t */
donatien 0:8e01dca41002 1215 len = 0xffff;
donatien 0:8e01dca41002 1216 #if LWIP_TCPIP_CORE_LOCKING
donatien 0:8e01dca41002 1217 conn->flags |= NETCONN_FLAG_WRITE_DELAYED;
donatien 0:8e01dca41002 1218 #endif
donatien 0:8e01dca41002 1219 apiflags |= TCP_WRITE_FLAG_MORE;
donatien 0:8e01dca41002 1220 } else {
donatien 0:8e01dca41002 1221 len = (u16_t)diff;
donatien 0:8e01dca41002 1222 }
donatien 0:8e01dca41002 1223 available = tcp_sndbuf(conn->pcb.tcp);
donatien 0:8e01dca41002 1224 if (available < len) {
donatien 0:8e01dca41002 1225 /* don't try to write more than sendbuf */
donatien 0:8e01dca41002 1226 len = available;
donatien 0:8e01dca41002 1227 #if LWIP_TCPIP_CORE_LOCKING
donatien 0:8e01dca41002 1228 conn->flags |= NETCONN_FLAG_WRITE_DELAYED;
donatien 0:8e01dca41002 1229 #endif
donatien 0:8e01dca41002 1230 apiflags |= TCP_WRITE_FLAG_MORE;
donatien 0:8e01dca41002 1231 }
donatien 0:8e01dca41002 1232 if (dontblock && (len < conn->current_msg->msg.w.len)) {
donatien 0:8e01dca41002 1233 /* failed to send all data at once -> nonblocking write not possible */
donatien 0:8e01dca41002 1234 err = ERR_MEM;
donatien 0:8e01dca41002 1235 }
donatien 0:8e01dca41002 1236 if (err == ERR_OK) {
donatien 0:8e01dca41002 1237 LWIP_ASSERT("do_writemore: invalid length!", ((conn->write_offset + len) <= conn->current_msg->msg.w.len));
donatien 0:8e01dca41002 1238 err = tcp_write(conn->pcb.tcp, dataptr, len, apiflags);
donatien 0:8e01dca41002 1239 }
donatien 0:8e01dca41002 1240 if (dontblock && (err == ERR_MEM)) {
donatien 0:8e01dca41002 1241 /* nonblocking write failed */
donatien 0:8e01dca41002 1242 write_finished = 1;
donatien 0:8e01dca41002 1243 err = ERR_WOULDBLOCK;
donatien 0:8e01dca41002 1244 /* let poll_tcp check writable space to mark the pcb
donatien 0:8e01dca41002 1245 writable again */
donatien 0:8e01dca41002 1246 conn->flags |= NETCONN_FLAG_CHECK_WRITESPACE;
donatien 0:8e01dca41002 1247 /* let select mark this pcb as non-writable. */
donatien 0:8e01dca41002 1248 API_EVENT(conn, NETCONN_EVT_SENDMINUS, len);
donatien 0:8e01dca41002 1249 } else {
donatien 0:8e01dca41002 1250 /* if OK or memory error, check available space */
donatien 0:8e01dca41002 1251 if (((err == ERR_OK) || (err == ERR_MEM)) &&
donatien 0:8e01dca41002 1252 ((tcp_sndbuf(conn->pcb.tcp) <= TCP_SNDLOWAT) ||
donatien 0:8e01dca41002 1253 (tcp_sndqueuelen(conn->pcb.tcp) >= TCP_SNDQUEUELOWAT))) {
donatien 0:8e01dca41002 1254 /* The queued byte- or pbuf-count exceeds the configured low-water limit,
donatien 0:8e01dca41002 1255 let select mark this pcb as non-writable. */
donatien 0:8e01dca41002 1256 API_EVENT(conn, NETCONN_EVT_SENDMINUS, len);
donatien 0:8e01dca41002 1257 }
donatien 0:8e01dca41002 1258
donatien 0:8e01dca41002 1259 if (err == ERR_OK) {
donatien 0:8e01dca41002 1260 conn->write_offset += len;
donatien 0:8e01dca41002 1261 if (conn->write_offset == conn->current_msg->msg.w.len) {
donatien 0:8e01dca41002 1262 /* everything was written */
donatien 0:8e01dca41002 1263 write_finished = 1;
donatien 0:8e01dca41002 1264 conn->write_offset = 0;
donatien 0:8e01dca41002 1265 }
donatien 0:8e01dca41002 1266 tcp_output(conn->pcb.tcp);
donatien 0:8e01dca41002 1267 } else if (err == ERR_MEM) {
donatien 0:8e01dca41002 1268 /* If ERR_MEM, we wait for sent_tcp or poll_tcp to be called
donatien 0:8e01dca41002 1269 we do NOT return to the application thread, since ERR_MEM is
donatien 0:8e01dca41002 1270 only a temporary error! */
donatien 0:8e01dca41002 1271
donatien 0:8e01dca41002 1272 /* tcp_write returned ERR_MEM, try tcp_output anyway */
donatien 0:8e01dca41002 1273 tcp_output(conn->pcb.tcp);
donatien 0:8e01dca41002 1274
donatien 0:8e01dca41002 1275 #if LWIP_TCPIP_CORE_LOCKING
donatien 0:8e01dca41002 1276 conn->flags |= NETCONN_FLAG_WRITE_DELAYED;
donatien 0:8e01dca41002 1277 #endif
donatien 0:8e01dca41002 1278 } else {
donatien 0:8e01dca41002 1279 /* On errors != ERR_MEM, we don't try writing any more but return
donatien 0:8e01dca41002 1280 the error to the application thread. */
donatien 0:8e01dca41002 1281 write_finished = 1;
donatien 0:8e01dca41002 1282 }
donatien 0:8e01dca41002 1283 }
donatien 0:8e01dca41002 1284
donatien 0:8e01dca41002 1285 if (write_finished) {
donatien 0:8e01dca41002 1286 /* everything was written: set back connection state
donatien 0:8e01dca41002 1287 and back to application task */
donatien 0:8e01dca41002 1288 conn->current_msg->err = err;
donatien 0:8e01dca41002 1289 conn->current_msg = NULL;
donatien 0:8e01dca41002 1290 conn->state = NETCONN_NONE;
donatien 0:8e01dca41002 1291 #if LWIP_TCPIP_CORE_LOCKING
donatien 0:8e01dca41002 1292 if ((conn->flags & NETCONN_FLAG_WRITE_DELAYED) != 0)
donatien 0:8e01dca41002 1293 #endif
donatien 0:8e01dca41002 1294 {
donatien 0:8e01dca41002 1295 sys_sem_signal(&conn->op_completed);
donatien 0:8e01dca41002 1296 }
donatien 0:8e01dca41002 1297 }
donatien 0:8e01dca41002 1298 #if LWIP_TCPIP_CORE_LOCKING
donatien 0:8e01dca41002 1299 else
donatien 0:8e01dca41002 1300 return ERR_MEM;
donatien 0:8e01dca41002 1301 #endif
donatien 0:8e01dca41002 1302 return ERR_OK;
donatien 0:8e01dca41002 1303 }
donatien 0:8e01dca41002 1304 #endif /* LWIP_TCP */
donatien 0:8e01dca41002 1305
donatien 0:8e01dca41002 1306 /**
donatien 0:8e01dca41002 1307 * Send some data on a TCP pcb contained in a netconn
donatien 0:8e01dca41002 1308 * Called from netconn_write
donatien 0:8e01dca41002 1309 *
donatien 0:8e01dca41002 1310 * @param msg the api_msg_msg pointing to the connection
donatien 0:8e01dca41002 1311 */
donatien 0:8e01dca41002 1312 void
donatien 0:8e01dca41002 1313 do_write(struct api_msg_msg *msg)
donatien 0:8e01dca41002 1314 {
donatien 0:8e01dca41002 1315 if (ERR_IS_FATAL(msg->conn->last_err)) {
donatien 0:8e01dca41002 1316 msg->err = msg->conn->last_err;
donatien 0:8e01dca41002 1317 } else {
donatien 0:8e01dca41002 1318 if (msg->conn->type == NETCONN_TCP) {
donatien 0:8e01dca41002 1319 #if LWIP_TCP
donatien 0:8e01dca41002 1320 if (msg->conn->state != NETCONN_NONE) {
donatien 0:8e01dca41002 1321 /* netconn is connecting, closing or in blocking write */
donatien 0:8e01dca41002 1322 msg->err = ERR_INPROGRESS;
donatien 0:8e01dca41002 1323 } else if (msg->conn->pcb.tcp != NULL) {
donatien 0:8e01dca41002 1324 msg->conn->state = NETCONN_WRITE;
donatien 0:8e01dca41002 1325 /* set all the variables used by do_writemore */
donatien 0:8e01dca41002 1326 LWIP_ASSERT("already writing or closing", msg->conn->current_msg == NULL &&
donatien 0:8e01dca41002 1327 msg->conn->write_offset == 0);
donatien 0:8e01dca41002 1328 LWIP_ASSERT("msg->msg.w.len != 0", msg->msg.w.len != 0);
donatien 0:8e01dca41002 1329 msg->conn->current_msg = msg;
donatien 0:8e01dca41002 1330 msg->conn->write_offset = 0;
donatien 0:8e01dca41002 1331 #if LWIP_TCPIP_CORE_LOCKING
donatien 0:8e01dca41002 1332 msg->conn->flags &= ~NETCONN_FLAG_WRITE_DELAYED;
donatien 0:8e01dca41002 1333 if (do_writemore(msg->conn) != ERR_OK) {
donatien 0:8e01dca41002 1334 LWIP_ASSERT("state!", msg->conn->state == NETCONN_WRITE);
donatien 0:8e01dca41002 1335 UNLOCK_TCPIP_CORE();
donatien 0:8e01dca41002 1336 sys_arch_sem_wait(&msg->conn->op_completed, 0);
donatien 0:8e01dca41002 1337 LOCK_TCPIP_CORE();
donatien 0:8e01dca41002 1338 LWIP_ASSERT("state!", msg->conn->state == NETCONN_NONE);
donatien 0:8e01dca41002 1339 }
donatien 0:8e01dca41002 1340 #else /* LWIP_TCPIP_CORE_LOCKING */
donatien 0:8e01dca41002 1341 do_writemore(msg->conn);
donatien 0:8e01dca41002 1342 #endif /* LWIP_TCPIP_CORE_LOCKING */
donatien 0:8e01dca41002 1343 /* for both cases: if do_writemore was called, don't ACK the APIMSG
donatien 0:8e01dca41002 1344 since do_writemore ACKs it! */
donatien 0:8e01dca41002 1345 return;
donatien 0:8e01dca41002 1346 } else {
donatien 0:8e01dca41002 1347 msg->err = ERR_CONN;
donatien 0:8e01dca41002 1348 }
donatien 0:8e01dca41002 1349 #else /* LWIP_TCP */
donatien 0:8e01dca41002 1350 msg->err = ERR_VAL;
donatien 0:8e01dca41002 1351 #endif /* LWIP_TCP */
donatien 0:8e01dca41002 1352 #if (LWIP_UDP || LWIP_RAW)
donatien 0:8e01dca41002 1353 } else {
donatien 0:8e01dca41002 1354 msg->err = ERR_VAL;
donatien 0:8e01dca41002 1355 #endif /* (LWIP_UDP || LWIP_RAW) */
donatien 0:8e01dca41002 1356 }
donatien 0:8e01dca41002 1357 }
donatien 0:8e01dca41002 1358 TCPIP_APIMSG_ACK(msg);
donatien 0:8e01dca41002 1359 }
donatien 0:8e01dca41002 1360
donatien 0:8e01dca41002 1361 /**
donatien 0:8e01dca41002 1362 * Return a connection's local or remote address
donatien 0:8e01dca41002 1363 * Called from netconn_getaddr
donatien 0:8e01dca41002 1364 *
donatien 0:8e01dca41002 1365 * @param msg the api_msg_msg pointing to the connection
donatien 0:8e01dca41002 1366 */
donatien 0:8e01dca41002 1367 void
donatien 0:8e01dca41002 1368 do_getaddr(struct api_msg_msg *msg)
donatien 0:8e01dca41002 1369 {
donatien 0:8e01dca41002 1370 if (msg->conn->pcb.ip != NULL) {
donatien 0:8e01dca41002 1371 *(msg->msg.ad.ipaddr) = (msg->msg.ad.local ? msg->conn->pcb.ip->local_ip :
donatien 0:8e01dca41002 1372 msg->conn->pcb.ip->remote_ip);
donatien 0:8e01dca41002 1373
donatien 0:8e01dca41002 1374 msg->err = ERR_OK;
donatien 0:8e01dca41002 1375 switch (NETCONNTYPE_GROUP(msg->conn->type)) {
donatien 0:8e01dca41002 1376 #if LWIP_RAW
donatien 0:8e01dca41002 1377 case NETCONN_RAW:
donatien 0:8e01dca41002 1378 if (msg->msg.ad.local) {
donatien 0:8e01dca41002 1379 *(msg->msg.ad.port) = msg->conn->pcb.raw->protocol;
donatien 0:8e01dca41002 1380 } else {
donatien 0:8e01dca41002 1381 /* return an error as connecting is only a helper for upper layers */
donatien 0:8e01dca41002 1382 msg->err = ERR_CONN;
donatien 0:8e01dca41002 1383 }
donatien 0:8e01dca41002 1384 break;
donatien 0:8e01dca41002 1385 #endif /* LWIP_RAW */
donatien 0:8e01dca41002 1386 #if LWIP_UDP
donatien 0:8e01dca41002 1387 case NETCONN_UDP:
donatien 0:8e01dca41002 1388 if (msg->msg.ad.local) {
donatien 0:8e01dca41002 1389 *(msg->msg.ad.port) = msg->conn->pcb.udp->local_port;
donatien 0:8e01dca41002 1390 } else {
donatien 0:8e01dca41002 1391 if ((msg->conn->pcb.udp->flags & UDP_FLAGS_CONNECTED) == 0) {
donatien 0:8e01dca41002 1392 msg->err = ERR_CONN;
donatien 0:8e01dca41002 1393 } else {
donatien 0:8e01dca41002 1394 *(msg->msg.ad.port) = msg->conn->pcb.udp->remote_port;
donatien 0:8e01dca41002 1395 }
donatien 0:8e01dca41002 1396 }
donatien 0:8e01dca41002 1397 break;
donatien 0:8e01dca41002 1398 #endif /* LWIP_UDP */
donatien 0:8e01dca41002 1399 #if LWIP_TCP
donatien 0:8e01dca41002 1400 case NETCONN_TCP:
donatien 0:8e01dca41002 1401 *(msg->msg.ad.port) = (msg->msg.ad.local?msg->conn->pcb.tcp->local_port:msg->conn->pcb.tcp->remote_port);
donatien 0:8e01dca41002 1402 break;
donatien 0:8e01dca41002 1403 #endif /* LWIP_TCP */
donatien 0:8e01dca41002 1404 default:
donatien 0:8e01dca41002 1405 LWIP_ASSERT("invalid netconn_type", 0);
donatien 0:8e01dca41002 1406 break;
donatien 0:8e01dca41002 1407 }
donatien 0:8e01dca41002 1408 } else {
donatien 0:8e01dca41002 1409 msg->err = ERR_CONN;
donatien 0:8e01dca41002 1410 }
donatien 0:8e01dca41002 1411 TCPIP_APIMSG_ACK(msg);
donatien 0:8e01dca41002 1412 }
donatien 0:8e01dca41002 1413
donatien 0:8e01dca41002 1414 /**
donatien 0:8e01dca41002 1415 * Close a TCP pcb contained in a netconn
donatien 0:8e01dca41002 1416 * Called from netconn_close
donatien 0:8e01dca41002 1417 *
donatien 0:8e01dca41002 1418 * @param msg the api_msg_msg pointing to the connection
donatien 0:8e01dca41002 1419 */
donatien 0:8e01dca41002 1420 void
donatien 0:8e01dca41002 1421 do_close(struct api_msg_msg *msg)
donatien 0:8e01dca41002 1422 {
donatien 0:8e01dca41002 1423 #if LWIP_TCP
donatien 0:8e01dca41002 1424 /* @todo: abort running write/connect? */
donatien 0:8e01dca41002 1425 if ((msg->conn->state != NETCONN_NONE) && (msg->conn->state != NETCONN_LISTEN)) {
donatien 0:8e01dca41002 1426 /* this only happens for TCP netconns */
donatien 0:8e01dca41002 1427 LWIP_ASSERT("msg->conn->type == NETCONN_TCP", msg->conn->type == NETCONN_TCP);
donatien 0:8e01dca41002 1428 msg->err = ERR_INPROGRESS;
donatien 0:8e01dca41002 1429 } else if ((msg->conn->pcb.tcp != NULL) && (msg->conn->type == NETCONN_TCP)) {
donatien 0:8e01dca41002 1430 if ((msg->msg.sd.shut != NETCONN_SHUT_RDWR) && (msg->conn->state == NETCONN_LISTEN)) {
donatien 0:8e01dca41002 1431 /* LISTEN doesn't support half shutdown */
donatien 0:8e01dca41002 1432 msg->err = ERR_CONN;
donatien 0:8e01dca41002 1433 } else {
donatien 0:8e01dca41002 1434 if (msg->msg.sd.shut & NETCONN_SHUT_RD) {
donatien 0:8e01dca41002 1435 /* Drain and delete mboxes */
donatien 0:8e01dca41002 1436 netconn_drain(msg->conn);
donatien 0:8e01dca41002 1437 }
donatien 0:8e01dca41002 1438 LWIP_ASSERT("already writing or closing", msg->conn->current_msg == NULL &&
donatien 0:8e01dca41002 1439 msg->conn->write_offset == 0);
donatien 0:8e01dca41002 1440 msg->conn->state = NETCONN_CLOSE;
donatien 0:8e01dca41002 1441 msg->conn->current_msg = msg;
donatien 0:8e01dca41002 1442 do_close_internal(msg->conn);
donatien 0:8e01dca41002 1443 /* for tcp netconns, do_close_internal ACKs the message */
donatien 0:8e01dca41002 1444 return;
donatien 0:8e01dca41002 1445 }
donatien 0:8e01dca41002 1446 } else
donatien 0:8e01dca41002 1447 #endif /* LWIP_TCP */
donatien 0:8e01dca41002 1448 {
donatien 0:8e01dca41002 1449 msg->err = ERR_VAL;
donatien 0:8e01dca41002 1450 }
donatien 0:8e01dca41002 1451 sys_sem_signal(&msg->conn->op_completed);
donatien 0:8e01dca41002 1452 }
donatien 0:8e01dca41002 1453
donatien 0:8e01dca41002 1454 #if LWIP_IGMP
donatien 0:8e01dca41002 1455 /**
donatien 0:8e01dca41002 1456 * Join multicast groups for UDP netconns.
donatien 0:8e01dca41002 1457 * Called from netconn_join_leave_group
donatien 0:8e01dca41002 1458 *
donatien 0:8e01dca41002 1459 * @param msg the api_msg_msg pointing to the connection
donatien 0:8e01dca41002 1460 */
donatien 0:8e01dca41002 1461 void
donatien 0:8e01dca41002 1462 do_join_leave_group(struct api_msg_msg *msg)
donatien 0:8e01dca41002 1463 {
donatien 0:8e01dca41002 1464 if (ERR_IS_FATAL(msg->conn->last_err)) {
donatien 0:8e01dca41002 1465 msg->err = msg->conn->last_err;
donatien 0:8e01dca41002 1466 } else {
donatien 0:8e01dca41002 1467 if (msg->conn->pcb.tcp != NULL) {
donatien 0:8e01dca41002 1468 if (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_UDP) {
donatien 0:8e01dca41002 1469 #if LWIP_UDP
donatien 0:8e01dca41002 1470 if (msg->msg.jl.join_or_leave == NETCONN_JOIN) {
donatien 0:8e01dca41002 1471 msg->err = igmp_joingroup(msg->msg.jl.netif_addr, msg->msg.jl.multiaddr);
donatien 0:8e01dca41002 1472 } else {
donatien 0:8e01dca41002 1473 msg->err = igmp_leavegroup(msg->msg.jl.netif_addr, msg->msg.jl.multiaddr);
donatien 0:8e01dca41002 1474 }
donatien 0:8e01dca41002 1475 #endif /* LWIP_UDP */
donatien 0:8e01dca41002 1476 #if (LWIP_TCP || LWIP_RAW)
donatien 0:8e01dca41002 1477 } else {
donatien 0:8e01dca41002 1478 msg->err = ERR_VAL;
donatien 0:8e01dca41002 1479 #endif /* (LWIP_TCP || LWIP_RAW) */
donatien 0:8e01dca41002 1480 }
donatien 0:8e01dca41002 1481 } else {
donatien 0:8e01dca41002 1482 msg->err = ERR_CONN;
donatien 0:8e01dca41002 1483 }
donatien 0:8e01dca41002 1484 }
donatien 0:8e01dca41002 1485 TCPIP_APIMSG_ACK(msg);
donatien 0:8e01dca41002 1486 }
donatien 0:8e01dca41002 1487 #endif /* LWIP_IGMP */
donatien 0:8e01dca41002 1488
donatien 0:8e01dca41002 1489 #if LWIP_DNS
donatien 0:8e01dca41002 1490 /**
donatien 0:8e01dca41002 1491 * Callback function that is called when DNS name is resolved
donatien 0:8e01dca41002 1492 * (or on timeout). A waiting application thread is waked up by
donatien 0:8e01dca41002 1493 * signaling the semaphore.
donatien 0:8e01dca41002 1494 */
donatien 0:8e01dca41002 1495 static void
donatien 0:8e01dca41002 1496 do_dns_found(const char *name, ip_addr_t *ipaddr, void *arg)
donatien 0:8e01dca41002 1497 {
donatien 0:8e01dca41002 1498 struct dns_api_msg *msg = (struct dns_api_msg*)arg;
donatien 0:8e01dca41002 1499
donatien 0:8e01dca41002 1500 LWIP_ASSERT("DNS response for wrong host name", strcmp(msg->name, name) == 0);
donatien 0:8e01dca41002 1501 LWIP_UNUSED_ARG(name);
donatien 0:8e01dca41002 1502
donatien 0:8e01dca41002 1503 if (ipaddr == NULL) {
donatien 0:8e01dca41002 1504 /* timeout or memory error */
donatien 0:8e01dca41002 1505 *msg->err = ERR_VAL;
donatien 0:8e01dca41002 1506 } else {
donatien 0:8e01dca41002 1507 /* address was resolved */
donatien 0:8e01dca41002 1508 *msg->err = ERR_OK;
donatien 0:8e01dca41002 1509 *msg->addr = *ipaddr;
donatien 0:8e01dca41002 1510 }
donatien 0:8e01dca41002 1511 /* wake up the application task waiting in netconn_gethostbyname */
donatien 0:8e01dca41002 1512 sys_sem_signal(msg->sem);
donatien 0:8e01dca41002 1513 }
donatien 0:8e01dca41002 1514
donatien 0:8e01dca41002 1515 /**
donatien 0:8e01dca41002 1516 * Execute a DNS query
donatien 0:8e01dca41002 1517 * Called from netconn_gethostbyname
donatien 0:8e01dca41002 1518 *
donatien 0:8e01dca41002 1519 * @param arg the dns_api_msg pointing to the query
donatien 0:8e01dca41002 1520 */
donatien 0:8e01dca41002 1521 void
donatien 0:8e01dca41002 1522 do_gethostbyname(void *arg)
donatien 0:8e01dca41002 1523 {
donatien 0:8e01dca41002 1524 struct dns_api_msg *msg = (struct dns_api_msg*)arg;
donatien 0:8e01dca41002 1525
donatien 0:8e01dca41002 1526 *msg->err = dns_gethostbyname(msg->name, msg->addr, do_dns_found, msg);
donatien 0:8e01dca41002 1527 if (*msg->err != ERR_INPROGRESS) {
donatien 0:8e01dca41002 1528 /* on error or immediate success, wake up the application
donatien 0:8e01dca41002 1529 * task waiting in netconn_gethostbyname */
donatien 0:8e01dca41002 1530 sys_sem_signal(msg->sem);
donatien 0:8e01dca41002 1531 }
donatien 0:8e01dca41002 1532 }
donatien 0:8e01dca41002 1533 #endif /* LWIP_DNS */
donatien 0:8e01dca41002 1534
donatien 0:8e01dca41002 1535 #endif /* LWIP_NETCONN */