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lwip/api/api_msg.c@0:d7bd7384a37c, 2016-12-07 (annotated)

Committer:
grzemich
Date:
Wed Dec 07 23:47:50 2016 +0000
Revision:
0:d7bd7384a37c
dgd

Who changed what in which revision?

UserRevisionLine numberNew contents of line
grzemich 0:d7bd7384a37c 1 /**
grzemich 0:d7bd7384a37c 2 * @file
grzemich 0:d7bd7384a37c 3 * Sequential API Internal module
grzemich 0:d7bd7384a37c 4 *
grzemich 0:d7bd7384a37c 5 */
grzemich 0:d7bd7384a37c 6
grzemich 0:d7bd7384a37c 7 /*
grzemich 0:d7bd7384a37c 8 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
grzemich 0:d7bd7384a37c 9 * All rights reserved.
grzemich 0:d7bd7384a37c 10 *
grzemich 0:d7bd7384a37c 11 * Redistribution and use in source and binary forms, with or without modification,
grzemich 0:d7bd7384a37c 12 * are permitted provided that the following conditions are met:
grzemich 0:d7bd7384a37c 13 *
grzemich 0:d7bd7384a37c 14 * 1. Redistributions of source code must retain the above copyright notice,
grzemich 0:d7bd7384a37c 15 * this list of conditions and the following disclaimer.
grzemich 0:d7bd7384a37c 16 * 2. Redistributions in binary form must reproduce the above copyright notice,
grzemich 0:d7bd7384a37c 17 * this list of conditions and the following disclaimer in the documentation
grzemich 0:d7bd7384a37c 18 * and/or other materials provided with the distribution.
grzemich 0:d7bd7384a37c 19 * 3. The name of the author may not be used to endorse or promote products
grzemich 0:d7bd7384a37c 20 * derived from this software without specific prior written permission.
grzemich 0:d7bd7384a37c 21 *
grzemich 0:d7bd7384a37c 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
grzemich 0:d7bd7384a37c 23 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
grzemich 0:d7bd7384a37c 24 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
grzemich 0:d7bd7384a37c 25 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
grzemich 0:d7bd7384a37c 26 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
grzemich 0:d7bd7384a37c 27 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
grzemich 0:d7bd7384a37c 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
grzemich 0:d7bd7384a37c 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
grzemich 0:d7bd7384a37c 30 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
grzemich 0:d7bd7384a37c 31 * OF SUCH DAMAGE.
grzemich 0:d7bd7384a37c 32 *
grzemich 0:d7bd7384a37c 33 * This file is part of the lwIP TCP/IP stack.
grzemich 0:d7bd7384a37c 34 *
grzemich 0:d7bd7384a37c 35 * Author: Adam Dunkels <adam@sics.se>
grzemich 0:d7bd7384a37c 36 *
grzemich 0:d7bd7384a37c 37 */
grzemich 0:d7bd7384a37c 38
grzemich 0:d7bd7384a37c 39 #include "lwip/opt.h"
grzemich 0:d7bd7384a37c 40
grzemich 0:d7bd7384a37c 41 #if LWIP_NETCONN /* don't build if not configured for use in lwipopts.h */
grzemich 0:d7bd7384a37c 42
grzemich 0:d7bd7384a37c 43 #include "lwip/api_msg.h"
grzemich 0:d7bd7384a37c 44
grzemich 0:d7bd7384a37c 45 #include "lwip/ip.h"
grzemich 0:d7bd7384a37c 46 #include "lwip/udp.h"
grzemich 0:d7bd7384a37c 47 #include "lwip/tcp.h"
grzemich 0:d7bd7384a37c 48 #include "lwip/raw.h"
grzemich 0:d7bd7384a37c 49
grzemich 0:d7bd7384a37c 50 #include "lwip/memp.h"
grzemich 0:d7bd7384a37c 51 #include "lwip/tcpip.h"
grzemich 0:d7bd7384a37c 52 #include "lwip/igmp.h"
grzemich 0:d7bd7384a37c 53 #include "lwip/dns.h"
grzemich 0:d7bd7384a37c 54
grzemich 0:d7bd7384a37c 55 #include <string.h>
grzemich 0:d7bd7384a37c 56
grzemich 0:d7bd7384a37c 57 #define SET_NONBLOCKING_CONNECT(conn, val) do { if(val) { \
grzemich 0:d7bd7384a37c 58 (conn)->flags |= NETCONN_FLAG_IN_NONBLOCKING_CONNECT; \
grzemich 0:d7bd7384a37c 59 } else { \
grzemich 0:d7bd7384a37c 60 (conn)->flags &= ~ NETCONN_FLAG_IN_NONBLOCKING_CONNECT; }} while(0)
grzemich 0:d7bd7384a37c 61 #define IN_NONBLOCKING_CONNECT(conn) (((conn)->flags & NETCONN_FLAG_IN_NONBLOCKING_CONNECT) != 0)
grzemich 0:d7bd7384a37c 62
grzemich 0:d7bd7384a37c 63 /* forward declarations */
grzemich 0:d7bd7384a37c 64 #if LWIP_TCP
grzemich 0:d7bd7384a37c 65 static err_t do_writemore(struct netconn *conn);
grzemich 0:d7bd7384a37c 66 static void do_close_internal(struct netconn *conn);
grzemich 0:d7bd7384a37c 67 #endif
grzemich 0:d7bd7384a37c 68
grzemich 0:d7bd7384a37c 69 #if LWIP_RAW
grzemich 0:d7bd7384a37c 70 /**
grzemich 0:d7bd7384a37c 71 * Receive callback function for RAW netconns.
grzemich 0:d7bd7384a37c 72 * Doesn't 'eat' the packet, only references it and sends it to
grzemich 0:d7bd7384a37c 73 * conn->recvmbox
grzemich 0:d7bd7384a37c 74 *
grzemich 0:d7bd7384a37c 75 * @see raw.h (struct raw_pcb.recv) for parameters and return value
grzemich 0:d7bd7384a37c 76 */
grzemich 0:d7bd7384a37c 77 static u8_t
grzemich 0:d7bd7384a37c 78 recv_raw(void *arg, struct raw_pcb *pcb, struct pbuf *p,
grzemich 0:d7bd7384a37c 79 ip_addr_t *addr)
grzemich 0:d7bd7384a37c 80 {
grzemich 0:d7bd7384a37c 81 struct pbuf *q;
grzemich 0:d7bd7384a37c 82 struct netbuf *buf;
grzemich 0:d7bd7384a37c 83 struct netconn *conn;
grzemich 0:d7bd7384a37c 84
grzemich 0:d7bd7384a37c 85 LWIP_UNUSED_ARG(addr);
grzemich 0:d7bd7384a37c 86 conn = (struct netconn *)arg;
grzemich 0:d7bd7384a37c 87
grzemich 0:d7bd7384a37c 88 if ((conn != NULL) && sys_mbox_valid(&conn->recvmbox)) {
grzemich 0:d7bd7384a37c 89 #if LWIP_SO_RCVBUF
grzemich 0:d7bd7384a37c 90 int recv_avail;
grzemich 0:d7bd7384a37c 91 SYS_ARCH_GET(conn->recv_avail, recv_avail);
grzemich 0:d7bd7384a37c 92 if ((recv_avail + (int)(p->tot_len)) > conn->recv_bufsize) {
grzemich 0:d7bd7384a37c 93 return 0;
grzemich 0:d7bd7384a37c 94 }
grzemich 0:d7bd7384a37c 95 #endif /* LWIP_SO_RCVBUF */
grzemich 0:d7bd7384a37c 96 /* copy the whole packet into new pbufs */
grzemich 0:d7bd7384a37c 97 q = pbuf_alloc(PBUF_RAW, p->tot_len, PBUF_RAM);
grzemich 0:d7bd7384a37c 98 if(q != NULL) {
grzemich 0:d7bd7384a37c 99 if (pbuf_copy(q, p) != ERR_OK) {
grzemich 0:d7bd7384a37c 100 pbuf_free(q);
grzemich 0:d7bd7384a37c 101 q = NULL;
grzemich 0:d7bd7384a37c 102 }
grzemich 0:d7bd7384a37c 103 }
grzemich 0:d7bd7384a37c 104
grzemich 0:d7bd7384a37c 105 if (q != NULL) {
grzemich 0:d7bd7384a37c 106 u16_t len;
grzemich 0:d7bd7384a37c 107 buf = (struct netbuf *)memp_malloc(MEMP_NETBUF);
grzemich 0:d7bd7384a37c 108 if (buf == NULL) {
grzemich 0:d7bd7384a37c 109 pbuf_free(q);
grzemich 0:d7bd7384a37c 110 return 0;
grzemich 0:d7bd7384a37c 111 }
grzemich 0:d7bd7384a37c 112
grzemich 0:d7bd7384a37c 113 buf->p = q;
grzemich 0:d7bd7384a37c 114 buf->ptr = q;
grzemich 0:d7bd7384a37c 115 ip_addr_copy(buf->addr, *ip_current_src_addr());
grzemich 0:d7bd7384a37c 116 buf->port = pcb->protocol;
grzemich 0:d7bd7384a37c 117
grzemich 0:d7bd7384a37c 118 len = q->tot_len;
grzemich 0:d7bd7384a37c 119 if (sys_mbox_trypost(&conn->recvmbox, buf) != ERR_OK) {
grzemich 0:d7bd7384a37c 120 netbuf_delete(buf);
grzemich 0:d7bd7384a37c 121 return 0;
grzemich 0:d7bd7384a37c 122 } else {
grzemich 0:d7bd7384a37c 123 #if LWIP_SO_RCVBUF
grzemich 0:d7bd7384a37c 124 SYS_ARCH_INC(conn->recv_avail, len);
grzemich 0:d7bd7384a37c 125 #endif /* LWIP_SO_RCVBUF */
grzemich 0:d7bd7384a37c 126 /* Register event with callback */
grzemich 0:d7bd7384a37c 127 API_EVENT(conn, NETCONN_EVT_RCVPLUS, len);
grzemich 0:d7bd7384a37c 128 }
grzemich 0:d7bd7384a37c 129 }
grzemich 0:d7bd7384a37c 130 }
grzemich 0:d7bd7384a37c 131
grzemich 0:d7bd7384a37c 132 return 0; /* do not eat the packet */
grzemich 0:d7bd7384a37c 133 }
grzemich 0:d7bd7384a37c 134 #endif /* LWIP_RAW*/
grzemich 0:d7bd7384a37c 135
grzemich 0:d7bd7384a37c 136 #if LWIP_UDP
grzemich 0:d7bd7384a37c 137 /**
grzemich 0:d7bd7384a37c 138 * Receive callback function for UDP netconns.
grzemich 0:d7bd7384a37c 139 * Posts the packet to conn->recvmbox or deletes it on memory error.
grzemich 0:d7bd7384a37c 140 *
grzemich 0:d7bd7384a37c 141 * @see udp.h (struct udp_pcb.recv) for parameters
grzemich 0:d7bd7384a37c 142 */
grzemich 0:d7bd7384a37c 143 static void
grzemich 0:d7bd7384a37c 144 recv_udp(void *arg, struct udp_pcb *pcb, struct pbuf *p,
grzemich 0:d7bd7384a37c 145 ip_addr_t *addr, u16_t port)
grzemich 0:d7bd7384a37c 146 {
grzemich 0:d7bd7384a37c 147 struct netbuf *buf;
grzemich 0:d7bd7384a37c 148 struct netconn *conn;
grzemich 0:d7bd7384a37c 149 u16_t len;
grzemich 0:d7bd7384a37c 150 #if LWIP_SO_RCVBUF
grzemich 0:d7bd7384a37c 151 int recv_avail;
grzemich 0:d7bd7384a37c 152 #endif /* LWIP_SO_RCVBUF */
grzemich 0:d7bd7384a37c 153
grzemich 0:d7bd7384a37c 154 LWIP_UNUSED_ARG(pcb); /* only used for asserts... */
grzemich 0:d7bd7384a37c 155 LWIP_ASSERT("recv_udp must have a pcb argument", pcb != NULL);
grzemich 0:d7bd7384a37c 156 LWIP_ASSERT("recv_udp must have an argument", arg != NULL);
grzemich 0:d7bd7384a37c 157 conn = (struct netconn *)arg;
grzemich 0:d7bd7384a37c 158 LWIP_ASSERT("recv_udp: recv for wrong pcb!", conn->pcb.udp == pcb);
grzemich 0:d7bd7384a37c 159
grzemich 0:d7bd7384a37c 160 #if LWIP_SO_RCVBUF
grzemich 0:d7bd7384a37c 161 SYS_ARCH_GET(conn->recv_avail, recv_avail);
grzemich 0:d7bd7384a37c 162 if ((conn == NULL) || !sys_mbox_valid(&conn->recvmbox) ||
grzemich 0:d7bd7384a37c 163 ((recv_avail + (int)(p->tot_len)) > conn->recv_bufsize)) {
grzemich 0:d7bd7384a37c 164 #else /* LWIP_SO_RCVBUF */
grzemich 0:d7bd7384a37c 165 if ((conn == NULL) || !sys_mbox_valid(&conn->recvmbox)) {
grzemich 0:d7bd7384a37c 166 #endif /* LWIP_SO_RCVBUF */
grzemich 0:d7bd7384a37c 167 pbuf_free(p);
grzemich 0:d7bd7384a37c 168 return;
grzemich 0:d7bd7384a37c 169 }
grzemich 0:d7bd7384a37c 170
grzemich 0:d7bd7384a37c 171 buf = (struct netbuf *)memp_malloc(MEMP_NETBUF);
grzemich 0:d7bd7384a37c 172 if (buf == NULL) {
grzemich 0:d7bd7384a37c 173 pbuf_free(p);
grzemich 0:d7bd7384a37c 174 return;
grzemich 0:d7bd7384a37c 175 } else {
grzemich 0:d7bd7384a37c 176 buf->p = p;
grzemich 0:d7bd7384a37c 177 buf->ptr = p;
grzemich 0:d7bd7384a37c 178 ip_addr_set(&buf->addr, addr);
grzemich 0:d7bd7384a37c 179 buf->port = port;
grzemich 0:d7bd7384a37c 180 #if LWIP_NETBUF_RECVINFO
grzemich 0:d7bd7384a37c 181 {
grzemich 0:d7bd7384a37c 182 const struct ip_hdr* iphdr = ip_current_header();
grzemich 0:d7bd7384a37c 183 /* get the UDP header - always in the first pbuf, ensured by udp_input */
grzemich 0:d7bd7384a37c 184 const struct udp_hdr* udphdr = (void*)(((char*)iphdr) + IPH_LEN(iphdr));
grzemich 0:d7bd7384a37c 185 #if LWIP_CHECKSUM_ON_COPY
grzemich 0:d7bd7384a37c 186 buf->flags = NETBUF_FLAG_DESTADDR;
grzemich 0:d7bd7384a37c 187 #endif /* LWIP_CHECKSUM_ON_COPY */
grzemich 0:d7bd7384a37c 188 ip_addr_set(&buf->toaddr, ip_current_dest_addr());
grzemich 0:d7bd7384a37c 189 buf->toport_chksum = udphdr->dest;
grzemich 0:d7bd7384a37c 190 }
grzemich 0:d7bd7384a37c 191 #endif /* LWIP_NETBUF_RECVINFO */
grzemich 0:d7bd7384a37c 192 }
grzemich 0:d7bd7384a37c 193
grzemich 0:d7bd7384a37c 194 len = p->tot_len;
grzemich 0:d7bd7384a37c 195 if (sys_mbox_trypost(&conn->recvmbox, buf) != ERR_OK) {
grzemich 0:d7bd7384a37c 196 netbuf_delete(buf);
grzemich 0:d7bd7384a37c 197 return;
grzemich 0:d7bd7384a37c 198 } else {
grzemich 0:d7bd7384a37c 199 #if LWIP_SO_RCVBUF
grzemich 0:d7bd7384a37c 200 SYS_ARCH_INC(conn->recv_avail, len);
grzemich 0:d7bd7384a37c 201 #endif /* LWIP_SO_RCVBUF */
grzemich 0:d7bd7384a37c 202 /* Register event with callback */
grzemich 0:d7bd7384a37c 203 API_EVENT(conn, NETCONN_EVT_RCVPLUS, len);
grzemich 0:d7bd7384a37c 204 }
grzemich 0:d7bd7384a37c 205 }
grzemich 0:d7bd7384a37c 206 #endif /* LWIP_UDP */
grzemich 0:d7bd7384a37c 207
grzemich 0:d7bd7384a37c 208 #if LWIP_TCP
grzemich 0:d7bd7384a37c 209 /**
grzemich 0:d7bd7384a37c 210 * Receive callback function for TCP netconns.
grzemich 0:d7bd7384a37c 211 * Posts the packet to conn->recvmbox, but doesn't delete it on errors.
grzemich 0:d7bd7384a37c 212 *
grzemich 0:d7bd7384a37c 213 * @see tcp.h (struct tcp_pcb.recv) for parameters and return value
grzemich 0:d7bd7384a37c 214 */
grzemich 0:d7bd7384a37c 215 static err_t
grzemich 0:d7bd7384a37c 216 recv_tcp(void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err)
grzemich 0:d7bd7384a37c 217 {
grzemich 0:d7bd7384a37c 218 struct netconn *conn;
grzemich 0:d7bd7384a37c 219 u16_t len;
grzemich 0:d7bd7384a37c 220
grzemich 0:d7bd7384a37c 221 LWIP_UNUSED_ARG(pcb);
grzemich 0:d7bd7384a37c 222 LWIP_ASSERT("recv_tcp must have a pcb argument", pcb != NULL);
grzemich 0:d7bd7384a37c 223 LWIP_ASSERT("recv_tcp must have an argument", arg != NULL);
grzemich 0:d7bd7384a37c 224 conn = (struct netconn *)arg;
grzemich 0:d7bd7384a37c 225 LWIP_ASSERT("recv_tcp: recv for wrong pcb!", conn->pcb.tcp == pcb);
grzemich 0:d7bd7384a37c 226
grzemich 0:d7bd7384a37c 227 if (conn == NULL) {
grzemich 0:d7bd7384a37c 228 return ERR_VAL;
grzemich 0:d7bd7384a37c 229 }
grzemich 0:d7bd7384a37c 230 if (!sys_mbox_valid(&conn->recvmbox)) {
grzemich 0:d7bd7384a37c 231 /* recvmbox already deleted */
grzemich 0:d7bd7384a37c 232 if (p != NULL) {
grzemich 0:d7bd7384a37c 233 tcp_recved(pcb, p->tot_len);
grzemich 0:d7bd7384a37c 234 pbuf_free(p);
grzemich 0:d7bd7384a37c 235 }
grzemich 0:d7bd7384a37c 236 return ERR_OK;
grzemich 0:d7bd7384a37c 237 }
grzemich 0:d7bd7384a37c 238 /* Unlike for UDP or RAW pcbs, don't check for available space
grzemich 0:d7bd7384a37c 239 using recv_avail since that could break the connection
grzemich 0:d7bd7384a37c 240 (data is already ACKed) */
grzemich 0:d7bd7384a37c 241
grzemich 0:d7bd7384a37c 242 /* don't overwrite fatal errors! */
grzemich 0:d7bd7384a37c 243 NETCONN_SET_SAFE_ERR(conn, err);
grzemich 0:d7bd7384a37c 244
grzemich 0:d7bd7384a37c 245 if (p != NULL) {
grzemich 0:d7bd7384a37c 246 len = p->tot_len;
grzemich 0:d7bd7384a37c 247 } else {
grzemich 0:d7bd7384a37c 248 len = 0;
grzemich 0:d7bd7384a37c 249 }
grzemich 0:d7bd7384a37c 250
grzemich 0:d7bd7384a37c 251 if (sys_mbox_trypost(&conn->recvmbox, p) != ERR_OK) {
grzemich 0:d7bd7384a37c 252 /* don't deallocate p: it is presented to us later again from tcp_fasttmr! */
grzemich 0:d7bd7384a37c 253 return ERR_MEM;
grzemich 0:d7bd7384a37c 254 } else {
grzemich 0:d7bd7384a37c 255 #if LWIP_SO_RCVBUF
grzemich 0:d7bd7384a37c 256 SYS_ARCH_INC(conn->recv_avail, len);
grzemich 0:d7bd7384a37c 257 #endif /* LWIP_SO_RCVBUF */
grzemich 0:d7bd7384a37c 258 /* Register event with callback */
grzemich 0:d7bd7384a37c 259 API_EVENT(conn, NETCONN_EVT_RCVPLUS, len);
grzemich 0:d7bd7384a37c 260 }
grzemich 0:d7bd7384a37c 261
grzemich 0:d7bd7384a37c 262 return ERR_OK;
grzemich 0:d7bd7384a37c 263 }
grzemich 0:d7bd7384a37c 264
grzemich 0:d7bd7384a37c 265 /**
grzemich 0:d7bd7384a37c 266 * Poll callback function for TCP netconns.
grzemich 0:d7bd7384a37c 267 * Wakes up an application thread that waits for a connection to close
grzemich 0:d7bd7384a37c 268 * or data to be sent. The application thread then takes the
grzemich 0:d7bd7384a37c 269 * appropriate action to go on.
grzemich 0:d7bd7384a37c 270 *
grzemich 0:d7bd7384a37c 271 * Signals the conn->sem.
grzemich 0:d7bd7384a37c 272 * netconn_close waits for conn->sem if closing failed.
grzemich 0:d7bd7384a37c 273 *
grzemich 0:d7bd7384a37c 274 * @see tcp.h (struct tcp_pcb.poll) for parameters and return value
grzemich 0:d7bd7384a37c 275 */
grzemich 0:d7bd7384a37c 276 static err_t
grzemich 0:d7bd7384a37c 277 poll_tcp(void *arg, struct tcp_pcb *pcb)
grzemich 0:d7bd7384a37c 278 {
grzemich 0:d7bd7384a37c 279 struct netconn *conn = (struct netconn *)arg;
grzemich 0:d7bd7384a37c 280
grzemich 0:d7bd7384a37c 281 LWIP_UNUSED_ARG(pcb);
grzemich 0:d7bd7384a37c 282 LWIP_ASSERT("conn != NULL", (conn != NULL));
grzemich 0:d7bd7384a37c 283
grzemich 0:d7bd7384a37c 284 if (conn->state == NETCONN_WRITE) {
grzemich 0:d7bd7384a37c 285 do_writemore(conn);
grzemich 0:d7bd7384a37c 286 } else if (conn->state == NETCONN_CLOSE) {
grzemich 0:d7bd7384a37c 287 do_close_internal(conn);
grzemich 0:d7bd7384a37c 288 }
grzemich 0:d7bd7384a37c 289 /* @todo: implement connect timeout here? */
grzemich 0:d7bd7384a37c 290
grzemich 0:d7bd7384a37c 291 /* Did a nonblocking write fail before? Then check available write-space. */
grzemich 0:d7bd7384a37c 292 if (conn->flags & NETCONN_FLAG_CHECK_WRITESPACE) {
grzemich 0:d7bd7384a37c 293 /* If the queued byte- or pbuf-count drops below the configured low-water limit,
grzemich 0:d7bd7384a37c 294 let select mark this pcb as writable again. */
grzemich 0:d7bd7384a37c 295 if ((conn->pcb.tcp != NULL) && (tcp_sndbuf(conn->pcb.tcp) > TCP_SNDLOWAT) &&
grzemich 0:d7bd7384a37c 296 (tcp_sndqueuelen(conn->pcb.tcp) < TCP_SNDQUEUELOWAT)) {
grzemich 0:d7bd7384a37c 297 conn->flags &= ~NETCONN_FLAG_CHECK_WRITESPACE;
grzemich 0:d7bd7384a37c 298 API_EVENT(conn, NETCONN_EVT_SENDPLUS, 0);
grzemich 0:d7bd7384a37c 299 }
grzemich 0:d7bd7384a37c 300 }
grzemich 0:d7bd7384a37c 301
grzemich 0:d7bd7384a37c 302 return ERR_OK;
grzemich 0:d7bd7384a37c 303 }
grzemich 0:d7bd7384a37c 304
grzemich 0:d7bd7384a37c 305 /**
grzemich 0:d7bd7384a37c 306 * Sent callback function for TCP netconns.
grzemich 0:d7bd7384a37c 307 * Signals the conn->sem and calls API_EVENT.
grzemich 0:d7bd7384a37c 308 * netconn_write waits for conn->sem if send buffer is low.
grzemich 0:d7bd7384a37c 309 *
grzemich 0:d7bd7384a37c 310 * @see tcp.h (struct tcp_pcb.sent) for parameters and return value
grzemich 0:d7bd7384a37c 311 */
grzemich 0:d7bd7384a37c 312 static err_t
grzemich 0:d7bd7384a37c 313 sent_tcp(void *arg, struct tcp_pcb *pcb, u16_t len)
grzemich 0:d7bd7384a37c 314 {
grzemich 0:d7bd7384a37c 315 struct netconn *conn = (struct netconn *)arg;
grzemich 0:d7bd7384a37c 316
grzemich 0:d7bd7384a37c 317 LWIP_UNUSED_ARG(pcb);
grzemich 0:d7bd7384a37c 318 LWIP_ASSERT("conn != NULL", (conn != NULL));
grzemich 0:d7bd7384a37c 319
grzemich 0:d7bd7384a37c 320 if (conn->state == NETCONN_WRITE) {
grzemich 0:d7bd7384a37c 321 do_writemore(conn);
grzemich 0:d7bd7384a37c 322 } else if (conn->state == NETCONN_CLOSE) {
grzemich 0:d7bd7384a37c 323 do_close_internal(conn);
grzemich 0:d7bd7384a37c 324 }
grzemich 0:d7bd7384a37c 325
grzemich 0:d7bd7384a37c 326 if (conn) {
grzemich 0:d7bd7384a37c 327 /* If the queued byte- or pbuf-count drops below the configured low-water limit,
grzemich 0:d7bd7384a37c 328 let select mark this pcb as writable again. */
grzemich 0:d7bd7384a37c 329 if ((conn->pcb.tcp != NULL) && (tcp_sndbuf(conn->pcb.tcp) > TCP_SNDLOWAT) &&
grzemich 0:d7bd7384a37c 330 (tcp_sndqueuelen(conn->pcb.tcp) < TCP_SNDQUEUELOWAT)) {
grzemich 0:d7bd7384a37c 331 conn->flags &= ~NETCONN_FLAG_CHECK_WRITESPACE;
grzemich 0:d7bd7384a37c 332 API_EVENT(conn, NETCONN_EVT_SENDPLUS, len);
grzemich 0:d7bd7384a37c 333 }
grzemich 0:d7bd7384a37c 334 }
grzemich 0:d7bd7384a37c 335
grzemich 0:d7bd7384a37c 336 return ERR_OK;
grzemich 0:d7bd7384a37c 337 }
grzemich 0:d7bd7384a37c 338
grzemich 0:d7bd7384a37c 339 /**
grzemich 0:d7bd7384a37c 340 * Error callback function for TCP netconns.
grzemich 0:d7bd7384a37c 341 * Signals conn->sem, posts to all conn mboxes and calls API_EVENT.
grzemich 0:d7bd7384a37c 342 * The application thread has then to decide what to do.
grzemich 0:d7bd7384a37c 343 *
grzemich 0:d7bd7384a37c 344 * @see tcp.h (struct tcp_pcb.err) for parameters
grzemich 0:d7bd7384a37c 345 */
grzemich 0:d7bd7384a37c 346 static void
grzemich 0:d7bd7384a37c 347 err_tcp(void *arg, err_t err)
grzemich 0:d7bd7384a37c 348 {
grzemich 0:d7bd7384a37c 349 struct netconn *conn;
grzemich 0:d7bd7384a37c 350 enum netconn_state old_state;
grzemich 0:d7bd7384a37c 351 SYS_ARCH_DECL_PROTECT(lev);
grzemich 0:d7bd7384a37c 352
grzemich 0:d7bd7384a37c 353 conn = (struct netconn *)arg;
grzemich 0:d7bd7384a37c 354 LWIP_ASSERT("conn != NULL", (conn != NULL));
grzemich 0:d7bd7384a37c 355
grzemich 0:d7bd7384a37c 356 conn->pcb.tcp = NULL;
grzemich 0:d7bd7384a37c 357
grzemich 0:d7bd7384a37c 358 /* no check since this is always fatal! */
grzemich 0:d7bd7384a37c 359 SYS_ARCH_PROTECT(lev);
grzemich 0:d7bd7384a37c 360 conn->last_err = err;
grzemich 0:d7bd7384a37c 361 SYS_ARCH_UNPROTECT(lev);
grzemich 0:d7bd7384a37c 362
grzemich 0:d7bd7384a37c 363 /* reset conn->state now before waking up other threads */
grzemich 0:d7bd7384a37c 364 old_state = conn->state;
grzemich 0:d7bd7384a37c 365 conn->state = NETCONN_NONE;
grzemich 0:d7bd7384a37c 366
grzemich 0:d7bd7384a37c 367 /* Notify the user layer about a connection error. Used to signal
grzemich 0:d7bd7384a37c 368 select. */
grzemich 0:d7bd7384a37c 369 API_EVENT(conn, NETCONN_EVT_ERROR, 0);
grzemich 0:d7bd7384a37c 370 /* Try to release selects pending on 'read' or 'write', too.
grzemich 0:d7bd7384a37c 371 They will get an error if they actually try to read or write. */
grzemich 0:d7bd7384a37c 372 API_EVENT(conn, NETCONN_EVT_RCVPLUS, 0);
grzemich 0:d7bd7384a37c 373 API_EVENT(conn, NETCONN_EVT_SENDPLUS, 0);
grzemich 0:d7bd7384a37c 374
grzemich 0:d7bd7384a37c 375 /* pass NULL-message to recvmbox to wake up pending recv */
grzemich 0:d7bd7384a37c 376 if (sys_mbox_valid(&conn->recvmbox)) {
grzemich 0:d7bd7384a37c 377 /* use trypost to prevent deadlock */
grzemich 0:d7bd7384a37c 378 sys_mbox_trypost(&conn->recvmbox, NULL);
grzemich 0:d7bd7384a37c 379 }
grzemich 0:d7bd7384a37c 380 /* pass NULL-message to acceptmbox to wake up pending accept */
grzemich 0:d7bd7384a37c 381 if (sys_mbox_valid(&conn->acceptmbox)) {
grzemich 0:d7bd7384a37c 382 /* use trypost to preven deadlock */
grzemich 0:d7bd7384a37c 383 sys_mbox_trypost(&conn->acceptmbox, NULL);
grzemich 0:d7bd7384a37c 384 }
grzemich 0:d7bd7384a37c 385
grzemich 0:d7bd7384a37c 386 if ((old_state == NETCONN_WRITE) || (old_state == NETCONN_CLOSE) ||
grzemich 0:d7bd7384a37c 387 (old_state == NETCONN_CONNECT)) {
grzemich 0:d7bd7384a37c 388 /* calling do_writemore/do_close_internal is not necessary
grzemich 0:d7bd7384a37c 389 since the pcb has already been deleted! */
grzemich 0:d7bd7384a37c 390 int was_nonblocking_connect = IN_NONBLOCKING_CONNECT(conn);
grzemich 0:d7bd7384a37c 391 SET_NONBLOCKING_CONNECT(conn, 0);
grzemich 0:d7bd7384a37c 392
grzemich 0:d7bd7384a37c 393 if (!was_nonblocking_connect) {
grzemich 0:d7bd7384a37c 394 /* set error return code */
grzemich 0:d7bd7384a37c 395 LWIP_ASSERT("conn->current_msg != NULL", conn->current_msg != NULL);
grzemich 0:d7bd7384a37c 396 conn->current_msg->err = err;
grzemich 0:d7bd7384a37c 397 conn->current_msg = NULL;
grzemich 0:d7bd7384a37c 398 /* wake up the waiting task */
grzemich 0:d7bd7384a37c 399 sys_sem_signal(&conn->op_completed);
grzemich 0:d7bd7384a37c 400 }
grzemich 0:d7bd7384a37c 401 } else {
grzemich 0:d7bd7384a37c 402 LWIP_ASSERT("conn->current_msg == NULL", conn->current_msg == NULL);
grzemich 0:d7bd7384a37c 403 }
grzemich 0:d7bd7384a37c 404 }
grzemich 0:d7bd7384a37c 405
grzemich 0:d7bd7384a37c 406 /**
grzemich 0:d7bd7384a37c 407 * Setup a tcp_pcb with the correct callback function pointers
grzemich 0:d7bd7384a37c 408 * and their arguments.
grzemich 0:d7bd7384a37c 409 *
grzemich 0:d7bd7384a37c 410 * @param conn the TCP netconn to setup
grzemich 0:d7bd7384a37c 411 */
grzemich 0:d7bd7384a37c 412 static void
grzemich 0:d7bd7384a37c 413 setup_tcp(struct netconn *conn)
grzemich 0:d7bd7384a37c 414 {
grzemich 0:d7bd7384a37c 415 struct tcp_pcb *pcb;
grzemich 0:d7bd7384a37c 416
grzemich 0:d7bd7384a37c 417 pcb = conn->pcb.tcp;
grzemich 0:d7bd7384a37c 418 tcp_arg(pcb, conn);
grzemich 0:d7bd7384a37c 419 tcp_recv(pcb, recv_tcp);
grzemich 0:d7bd7384a37c 420 tcp_sent(pcb, sent_tcp);
grzemich 0:d7bd7384a37c 421 tcp_poll(pcb, poll_tcp, 4);
grzemich 0:d7bd7384a37c 422 tcp_err(pcb, err_tcp);
grzemich 0:d7bd7384a37c 423 }
grzemich 0:d7bd7384a37c 424
grzemich 0:d7bd7384a37c 425 /**
grzemich 0:d7bd7384a37c 426 * Accept callback function for TCP netconns.
grzemich 0:d7bd7384a37c 427 * Allocates a new netconn and posts that to conn->acceptmbox.
grzemich 0:d7bd7384a37c 428 *
grzemich 0:d7bd7384a37c 429 * @see tcp.h (struct tcp_pcb_listen.accept) for parameters and return value
grzemich 0:d7bd7384a37c 430 */
grzemich 0:d7bd7384a37c 431 static err_t
grzemich 0:d7bd7384a37c 432 accept_function(void *arg, struct tcp_pcb *newpcb, err_t err)
grzemich 0:d7bd7384a37c 433 {
grzemich 0:d7bd7384a37c 434 struct netconn *newconn;
grzemich 0:d7bd7384a37c 435 struct netconn *conn = (struct netconn *)arg;
grzemich 0:d7bd7384a37c 436
grzemich 0:d7bd7384a37c 437 LWIP_DEBUGF(API_MSG_DEBUG, ("accept_function: newpcb->tate: %s\n", tcp_debug_state_str(newpcb->state)));
grzemich 0:d7bd7384a37c 438
grzemich 0:d7bd7384a37c 439 if (!sys_mbox_valid(&conn->acceptmbox)) {
grzemich 0:d7bd7384a37c 440 LWIP_DEBUGF(API_MSG_DEBUG, ("accept_function: acceptmbox already deleted\n"));
grzemich 0:d7bd7384a37c 441 return ERR_VAL;
grzemich 0:d7bd7384a37c 442 }
grzemich 0:d7bd7384a37c 443
grzemich 0:d7bd7384a37c 444 /* We have to set the callback here even though
grzemich 0:d7bd7384a37c 445 * the new socket is unknown. conn->socket is marked as -1. */
grzemich 0:d7bd7384a37c 446 newconn = netconn_alloc(conn->type, conn->callback);
grzemich 0:d7bd7384a37c 447 if (newconn == NULL) {
grzemich 0:d7bd7384a37c 448 return ERR_MEM;
grzemich 0:d7bd7384a37c 449 }
grzemich 0:d7bd7384a37c 450 newconn->pcb.tcp = newpcb;
grzemich 0:d7bd7384a37c 451 setup_tcp(newconn);
grzemich 0:d7bd7384a37c 452 /* no protection: when creating the pcb, the netconn is not yet known
grzemich 0:d7bd7384a37c 453 to the application thread */
grzemich 0:d7bd7384a37c 454 newconn->last_err = err;
grzemich 0:d7bd7384a37c 455
grzemich 0:d7bd7384a37c 456 if (sys_mbox_trypost(&conn->acceptmbox, newconn) != ERR_OK) {
grzemich 0:d7bd7384a37c 457 /* When returning != ERR_OK, the pcb is aborted in tcp_process(),
grzemich 0:d7bd7384a37c 458 so do nothing here! */
grzemich 0:d7bd7384a37c 459 newconn->pcb.tcp = NULL;
grzemich 0:d7bd7384a37c 460 /* no need to drain since we know the recvmbox is empty. */
grzemich 0:d7bd7384a37c 461 sys_mbox_free(&newconn->recvmbox);
grzemich 0:d7bd7384a37c 462 sys_mbox_set_invalid(&newconn->recvmbox);
grzemich 0:d7bd7384a37c 463 netconn_free(newconn);
grzemich 0:d7bd7384a37c 464 return ERR_MEM;
grzemich 0:d7bd7384a37c 465 } else {
grzemich 0:d7bd7384a37c 466 /* Register event with callback */
grzemich 0:d7bd7384a37c 467 API_EVENT(conn, NETCONN_EVT_RCVPLUS, 0);
grzemich 0:d7bd7384a37c 468 }
grzemich 0:d7bd7384a37c 469
grzemich 0:d7bd7384a37c 470 return ERR_OK;
grzemich 0:d7bd7384a37c 471 }
grzemich 0:d7bd7384a37c 472 #endif /* LWIP_TCP */
grzemich 0:d7bd7384a37c 473
grzemich 0:d7bd7384a37c 474 /**
grzemich 0:d7bd7384a37c 475 * Create a new pcb of a specific type.
grzemich 0:d7bd7384a37c 476 * Called from do_newconn().
grzemich 0:d7bd7384a37c 477 *
grzemich 0:d7bd7384a37c 478 * @param msg the api_msg_msg describing the connection type
grzemich 0:d7bd7384a37c 479 * @return msg->conn->err, but the return value is currently ignored
grzemich 0:d7bd7384a37c 480 */
grzemich 0:d7bd7384a37c 481 static void
grzemich 0:d7bd7384a37c 482 pcb_new(struct api_msg_msg *msg)
grzemich 0:d7bd7384a37c 483 {
grzemich 0:d7bd7384a37c 484 LWIP_ASSERT("pcb_new: pcb already allocated", msg->conn->pcb.tcp == NULL);
grzemich 0:d7bd7384a37c 485
grzemich 0:d7bd7384a37c 486 /* Allocate a PCB for this connection */
grzemich 0:d7bd7384a37c 487 switch(NETCONNTYPE_GROUP(msg->conn->type)) {
grzemich 0:d7bd7384a37c 488 #if LWIP_RAW
grzemich 0:d7bd7384a37c 489 case NETCONN_RAW:
grzemich 0:d7bd7384a37c 490 msg->conn->pcb.raw = raw_new(msg->msg.n.proto);
grzemich 0:d7bd7384a37c 491 if(msg->conn->pcb.raw == NULL) {
grzemich 0:d7bd7384a37c 492 msg->err = ERR_MEM;
grzemich 0:d7bd7384a37c 493 break;
grzemich 0:d7bd7384a37c 494 }
grzemich 0:d7bd7384a37c 495 raw_recv(msg->conn->pcb.raw, recv_raw, msg->conn);
grzemich 0:d7bd7384a37c 496 break;
grzemich 0:d7bd7384a37c 497 #endif /* LWIP_RAW */
grzemich 0:d7bd7384a37c 498 #if LWIP_UDP
grzemich 0:d7bd7384a37c 499 case NETCONN_UDP:
grzemich 0:d7bd7384a37c 500 msg->conn->pcb.udp = udp_new();
grzemich 0:d7bd7384a37c 501 if(msg->conn->pcb.udp == NULL) {
grzemich 0:d7bd7384a37c 502 msg->err = ERR_MEM;
grzemich 0:d7bd7384a37c 503 break;
grzemich 0:d7bd7384a37c 504 }
grzemich 0:d7bd7384a37c 505 #if LWIP_UDPLITE
grzemich 0:d7bd7384a37c 506 if (msg->conn->type==NETCONN_UDPLITE) {
grzemich 0:d7bd7384a37c 507 udp_setflags(msg->conn->pcb.udp, UDP_FLAGS_UDPLITE);
grzemich 0:d7bd7384a37c 508 }
grzemich 0:d7bd7384a37c 509 #endif /* LWIP_UDPLITE */
grzemich 0:d7bd7384a37c 510 if (msg->conn->type==NETCONN_UDPNOCHKSUM) {
grzemich 0:d7bd7384a37c 511 udp_setflags(msg->conn->pcb.udp, UDP_FLAGS_NOCHKSUM);
grzemich 0:d7bd7384a37c 512 }
grzemich 0:d7bd7384a37c 513 udp_recv(msg->conn->pcb.udp, recv_udp, msg->conn);
grzemich 0:d7bd7384a37c 514 break;
grzemich 0:d7bd7384a37c 515 #endif /* LWIP_UDP */
grzemich 0:d7bd7384a37c 516 #if LWIP_TCP
grzemich 0:d7bd7384a37c 517 case NETCONN_TCP:
grzemich 0:d7bd7384a37c 518 msg->conn->pcb.tcp = tcp_new();
grzemich 0:d7bd7384a37c 519 if(msg->conn->pcb.tcp == NULL) {
grzemich 0:d7bd7384a37c 520 msg->err = ERR_MEM;
grzemich 0:d7bd7384a37c 521 break;
grzemich 0:d7bd7384a37c 522 }
grzemich 0:d7bd7384a37c 523 setup_tcp(msg->conn);
grzemich 0:d7bd7384a37c 524 break;
grzemich 0:d7bd7384a37c 525 #endif /* LWIP_TCP */
grzemich 0:d7bd7384a37c 526 default:
grzemich 0:d7bd7384a37c 527 /* Unsupported netconn type, e.g. protocol disabled */
grzemich 0:d7bd7384a37c 528 msg->err = ERR_VAL;
grzemich 0:d7bd7384a37c 529 break;
grzemich 0:d7bd7384a37c 530 }
grzemich 0:d7bd7384a37c 531 }
grzemich 0:d7bd7384a37c 532
grzemich 0:d7bd7384a37c 533 /**
grzemich 0:d7bd7384a37c 534 * Create a new pcb of a specific type inside a netconn.
grzemich 0:d7bd7384a37c 535 * Called from netconn_new_with_proto_and_callback.
grzemich 0:d7bd7384a37c 536 *
grzemich 0:d7bd7384a37c 537 * @param msg the api_msg_msg describing the connection type
grzemich 0:d7bd7384a37c 538 */
grzemich 0:d7bd7384a37c 539 void
grzemich 0:d7bd7384a37c 540 do_newconn(struct api_msg_msg *msg)
grzemich 0:d7bd7384a37c 541 {
grzemich 0:d7bd7384a37c 542 msg->err = ERR_OK;
grzemich 0:d7bd7384a37c 543 if(msg->conn->pcb.tcp == NULL) {
grzemich 0:d7bd7384a37c 544 pcb_new(msg);
grzemich 0:d7bd7384a37c 545 }
grzemich 0:d7bd7384a37c 546 /* Else? This "new" connection already has a PCB allocated. */
grzemich 0:d7bd7384a37c 547 /* Is this an error condition? Should it be deleted? */
grzemich 0:d7bd7384a37c 548 /* We currently just are happy and return. */
grzemich 0:d7bd7384a37c 549
grzemich 0:d7bd7384a37c 550 TCPIP_APIMSG_ACK(msg);
grzemich 0:d7bd7384a37c 551 }
grzemich 0:d7bd7384a37c 552
grzemich 0:d7bd7384a37c 553 /**
grzemich 0:d7bd7384a37c 554 * Create a new netconn (of a specific type) that has a callback function.
grzemich 0:d7bd7384a37c 555 * The corresponding pcb is NOT created!
grzemich 0:d7bd7384a37c 556 *
grzemich 0:d7bd7384a37c 557 * @param t the type of 'connection' to create (@see enum netconn_type)
grzemich 0:d7bd7384a37c 558 * @param proto the IP protocol for RAW IP pcbs
grzemich 0:d7bd7384a37c 559 * @param callback a function to call on status changes (RX available, TX'ed)
grzemich 0:d7bd7384a37c 560 * @return a newly allocated struct netconn or
grzemich 0:d7bd7384a37c 561 * NULL on memory error
grzemich 0:d7bd7384a37c 562 */
grzemich 0:d7bd7384a37c 563 struct netconn*
grzemich 0:d7bd7384a37c 564 netconn_alloc(enum netconn_type t, netconn_callback callback)
grzemich 0:d7bd7384a37c 565 {
grzemich 0:d7bd7384a37c 566 struct netconn *conn;
grzemich 0:d7bd7384a37c 567 int size;
grzemich 0:d7bd7384a37c 568
grzemich 0:d7bd7384a37c 569 conn = (struct netconn *)memp_malloc(MEMP_NETCONN);
grzemich 0:d7bd7384a37c 570 if (conn == NULL) {
grzemich 0:d7bd7384a37c 571 return NULL;
grzemich 0:d7bd7384a37c 572 }
grzemich 0:d7bd7384a37c 573
grzemich 0:d7bd7384a37c 574 conn->last_err = ERR_OK;
grzemich 0:d7bd7384a37c 575 conn->type = t;
grzemich 0:d7bd7384a37c 576 conn->pcb.tcp = NULL;
grzemich 0:d7bd7384a37c 577
grzemich 0:d7bd7384a37c 578 #if (DEFAULT_RAW_RECVMBOX_SIZE == DEFAULT_UDP_RECVMBOX_SIZE) && \
grzemich 0:d7bd7384a37c 579 (DEFAULT_RAW_RECVMBOX_SIZE == DEFAULT_TCP_RECVMBOX_SIZE)
grzemich 0:d7bd7384a37c 580 size = DEFAULT_RAW_RECVMBOX_SIZE;
grzemich 0:d7bd7384a37c 581 #else
grzemich 0:d7bd7384a37c 582 switch(NETCONNTYPE_GROUP(t)) {
grzemich 0:d7bd7384a37c 583 #if LWIP_RAW
grzemich 0:d7bd7384a37c 584 case NETCONN_RAW:
grzemich 0:d7bd7384a37c 585 size = DEFAULT_RAW_RECVMBOX_SIZE;
grzemich 0:d7bd7384a37c 586 break;
grzemich 0:d7bd7384a37c 587 #endif /* LWIP_RAW */
grzemich 0:d7bd7384a37c 588 #if LWIP_UDP
grzemich 0:d7bd7384a37c 589 case NETCONN_UDP:
grzemich 0:d7bd7384a37c 590 size = DEFAULT_UDP_RECVMBOX_SIZE;
grzemich 0:d7bd7384a37c 591 break;
grzemich 0:d7bd7384a37c 592 #endif /* LWIP_UDP */
grzemich 0:d7bd7384a37c 593 #if LWIP_TCP
grzemich 0:d7bd7384a37c 594 case NETCONN_TCP:
grzemich 0:d7bd7384a37c 595 size = DEFAULT_TCP_RECVMBOX_SIZE;
grzemich 0:d7bd7384a37c 596 break;
grzemich 0:d7bd7384a37c 597 #endif /* LWIP_TCP */
grzemich 0:d7bd7384a37c 598 default:
grzemich 0:d7bd7384a37c 599 LWIP_ASSERT("netconn_alloc: undefined netconn_type", 0);
grzemich 0:d7bd7384a37c 600 break;
grzemich 0:d7bd7384a37c 601 }
grzemich 0:d7bd7384a37c 602 #endif
grzemich 0:d7bd7384a37c 603
grzemich 0:d7bd7384a37c 604 if (sys_sem_new(&conn->op_completed, 0) != ERR_OK) {
grzemich 0:d7bd7384a37c 605 memp_free(MEMP_NETCONN, conn);
grzemich 0:d7bd7384a37c 606 return NULL;
grzemich 0:d7bd7384a37c 607 }
grzemich 0:d7bd7384a37c 608 if (sys_mbox_new(&conn->recvmbox, size) != ERR_OK) {
grzemich 0:d7bd7384a37c 609 sys_sem_free(&conn->op_completed);
grzemich 0:d7bd7384a37c 610 memp_free(MEMP_NETCONN, conn);
grzemich 0:d7bd7384a37c 611 return NULL;
grzemich 0:d7bd7384a37c 612 }
grzemich 0:d7bd7384a37c 613
grzemich 0:d7bd7384a37c 614 #if LWIP_TCP
grzemich 0:d7bd7384a37c 615 sys_mbox_set_invalid(&conn->acceptmbox);
grzemich 0:d7bd7384a37c 616 #endif
grzemich 0:d7bd7384a37c 617 conn->state = NETCONN_NONE;
grzemich 0:d7bd7384a37c 618 #if LWIP_SOCKET
grzemich 0:d7bd7384a37c 619 /* initialize socket to -1 since 0 is a valid socket */
grzemich 0:d7bd7384a37c 620 conn->socket = -1;
grzemich 0:d7bd7384a37c 621 #endif /* LWIP_SOCKET */
grzemich 0:d7bd7384a37c 622 conn->callback = callback;
grzemich 0:d7bd7384a37c 623 #if LWIP_TCP
grzemich 0:d7bd7384a37c 624 conn->current_msg = NULL;
grzemich 0:d7bd7384a37c 625 conn->write_offset = 0;
grzemich 0:d7bd7384a37c 626 #endif /* LWIP_TCP */
grzemich 0:d7bd7384a37c 627 #if LWIP_SO_RCVTIMEO
grzemich 0:d7bd7384a37c 628 conn->recv_timeout = 0;
grzemich 0:d7bd7384a37c 629 #endif /* LWIP_SO_RCVTIMEO */
grzemich 0:d7bd7384a37c 630 #if LWIP_SO_RCVBUF
grzemich 0:d7bd7384a37c 631 conn->recv_bufsize = RECV_BUFSIZE_DEFAULT;
grzemich 0:d7bd7384a37c 632 conn->recv_avail = 0;
grzemich 0:d7bd7384a37c 633 #endif /* LWIP_SO_RCVBUF */
grzemich 0:d7bd7384a37c 634 conn->flags = 0;
grzemich 0:d7bd7384a37c 635 return conn;
grzemich 0:d7bd7384a37c 636 }
grzemich 0:d7bd7384a37c 637
grzemich 0:d7bd7384a37c 638 /**
grzemich 0:d7bd7384a37c 639 * Delete a netconn and all its resources.
grzemich 0:d7bd7384a37c 640 * The pcb is NOT freed (since we might not be in the right thread context do this).
grzemich 0:d7bd7384a37c 641 *
grzemich 0:d7bd7384a37c 642 * @param conn the netconn to free
grzemich 0:d7bd7384a37c 643 */
grzemich 0:d7bd7384a37c 644 void
grzemich 0:d7bd7384a37c 645 netconn_free(struct netconn *conn)
grzemich 0:d7bd7384a37c 646 {
grzemich 0:d7bd7384a37c 647 LWIP_ASSERT("PCB must be deallocated outside this function", conn->pcb.tcp == NULL);
grzemich 0:d7bd7384a37c 648 LWIP_ASSERT("recvmbox must be deallocated before calling this function",
grzemich 0:d7bd7384a37c 649 !sys_mbox_valid(&conn->recvmbox));
grzemich 0:d7bd7384a37c 650 #if LWIP_TCP
grzemich 0:d7bd7384a37c 651 LWIP_ASSERT("acceptmbox must be deallocated before calling this function",
grzemich 0:d7bd7384a37c 652 !sys_mbox_valid(&conn->acceptmbox));
grzemich 0:d7bd7384a37c 653 #endif /* LWIP_TCP */
grzemich 0:d7bd7384a37c 654
grzemich 0:d7bd7384a37c 655 sys_sem_free(&conn->op_completed);
grzemich 0:d7bd7384a37c 656 sys_sem_set_invalid(&conn->op_completed);
grzemich 0:d7bd7384a37c 657
grzemich 0:d7bd7384a37c 658 memp_free(MEMP_NETCONN, conn);
grzemich 0:d7bd7384a37c 659 }
grzemich 0:d7bd7384a37c 660
grzemich 0:d7bd7384a37c 661 /**
grzemich 0:d7bd7384a37c 662 * Delete rcvmbox and acceptmbox of a netconn and free the left-over data in
grzemich 0:d7bd7384a37c 663 * these mboxes
grzemich 0:d7bd7384a37c 664 *
grzemich 0:d7bd7384a37c 665 * @param conn the netconn to free
grzemich 0:d7bd7384a37c 666 * @bytes_drained bytes drained from recvmbox
grzemich 0:d7bd7384a37c 667 * @accepts_drained pending connections drained from acceptmbox
grzemich 0:d7bd7384a37c 668 */
grzemich 0:d7bd7384a37c 669 static void
grzemich 0:d7bd7384a37c 670 netconn_drain(struct netconn *conn)
grzemich 0:d7bd7384a37c 671 {
grzemich 0:d7bd7384a37c 672 void *mem;
grzemich 0:d7bd7384a37c 673 #if LWIP_TCP
grzemich 0:d7bd7384a37c 674 struct pbuf *p;
grzemich 0:d7bd7384a37c 675 #endif /* LWIP_TCP */
grzemich 0:d7bd7384a37c 676
grzemich 0:d7bd7384a37c 677 /* This runs in tcpip_thread, so we don't need to lock against rx packets */
grzemich 0:d7bd7384a37c 678
grzemich 0:d7bd7384a37c 679 /* Delete and drain the recvmbox. */
grzemich 0:d7bd7384a37c 680 if (sys_mbox_valid(&conn->recvmbox)) {
grzemich 0:d7bd7384a37c 681 while (sys_mbox_tryfetch(&conn->recvmbox, &mem) != SYS_MBOX_EMPTY) {
grzemich 0:d7bd7384a37c 682 #if LWIP_TCP
grzemich 0:d7bd7384a37c 683 if (conn->type == NETCONN_TCP) {
grzemich 0:d7bd7384a37c 684 if(mem != NULL) {
grzemich 0:d7bd7384a37c 685 p = (struct pbuf*)mem;
grzemich 0:d7bd7384a37c 686 /* pcb might be set to NULL already by err_tcp() */
grzemich 0:d7bd7384a37c 687 if (conn->pcb.tcp != NULL) {
grzemich 0:d7bd7384a37c 688 tcp_recved(conn->pcb.tcp, p->tot_len);
grzemich 0:d7bd7384a37c 689 }
grzemich 0:d7bd7384a37c 690 pbuf_free(p);
grzemich 0:d7bd7384a37c 691 }
grzemich 0:d7bd7384a37c 692 } else
grzemich 0:d7bd7384a37c 693 #endif /* LWIP_TCP */
grzemich 0:d7bd7384a37c 694 {
grzemich 0:d7bd7384a37c 695 netbuf_delete((struct netbuf *)mem);
grzemich 0:d7bd7384a37c 696 }
grzemich 0:d7bd7384a37c 697 }
grzemich 0:d7bd7384a37c 698 sys_mbox_free(&conn->recvmbox);
grzemich 0:d7bd7384a37c 699 sys_mbox_set_invalid(&conn->recvmbox);
grzemich 0:d7bd7384a37c 700 }
grzemich 0:d7bd7384a37c 701
grzemich 0:d7bd7384a37c 702 /* Delete and drain the acceptmbox. */
grzemich 0:d7bd7384a37c 703 #if LWIP_TCP
grzemich 0:d7bd7384a37c 704 if (sys_mbox_valid(&conn->acceptmbox)) {
grzemich 0:d7bd7384a37c 705 while (sys_mbox_tryfetch(&conn->acceptmbox, &mem) != SYS_MBOX_EMPTY) {
grzemich 0:d7bd7384a37c 706 struct netconn *newconn = (struct netconn *)mem;
grzemich 0:d7bd7384a37c 707 /* Only tcp pcbs have an acceptmbox, so no need to check conn->type */
grzemich 0:d7bd7384a37c 708 /* pcb might be set to NULL already by err_tcp() */
grzemich 0:d7bd7384a37c 709 if (conn->pcb.tcp != NULL) {
grzemich 0:d7bd7384a37c 710 tcp_accepted(conn->pcb.tcp);
grzemich 0:d7bd7384a37c 711 }
grzemich 0:d7bd7384a37c 712 /* drain recvmbox */
grzemich 0:d7bd7384a37c 713 netconn_drain(newconn);
grzemich 0:d7bd7384a37c 714 if (newconn->pcb.tcp != NULL) {
grzemich 0:d7bd7384a37c 715 tcp_abort(newconn->pcb.tcp);
grzemich 0:d7bd7384a37c 716 newconn->pcb.tcp = NULL;
grzemich 0:d7bd7384a37c 717 }
grzemich 0:d7bd7384a37c 718 netconn_free(newconn);
grzemich 0:d7bd7384a37c 719 }
grzemich 0:d7bd7384a37c 720 sys_mbox_free(&conn->acceptmbox);
grzemich 0:d7bd7384a37c 721 sys_mbox_set_invalid(&conn->acceptmbox);
grzemich 0:d7bd7384a37c 722 }
grzemich 0:d7bd7384a37c 723 #endif /* LWIP_TCP */
grzemich 0:d7bd7384a37c 724 }
grzemich 0:d7bd7384a37c 725
grzemich 0:d7bd7384a37c 726 #if LWIP_TCP
grzemich 0:d7bd7384a37c 727 /**
grzemich 0:d7bd7384a37c 728 * Internal helper function to close a TCP netconn: since this sometimes
grzemich 0:d7bd7384a37c 729 * doesn't work at the first attempt, this function is called from multiple
grzemich 0:d7bd7384a37c 730 * places.
grzemich 0:d7bd7384a37c 731 *
grzemich 0:d7bd7384a37c 732 * @param conn the TCP netconn to close
grzemich 0:d7bd7384a37c 733 */
grzemich 0:d7bd7384a37c 734 static void
grzemich 0:d7bd7384a37c 735 do_close_internal(struct netconn *conn)
grzemich 0:d7bd7384a37c 736 {
grzemich 0:d7bd7384a37c 737 err_t err;
grzemich 0:d7bd7384a37c 738 u8_t shut, shut_rx, shut_tx, close;
grzemich 0:d7bd7384a37c 739
grzemich 0:d7bd7384a37c 740 LWIP_ASSERT("invalid conn", (conn != NULL));
grzemich 0:d7bd7384a37c 741 LWIP_ASSERT("this is for tcp netconns only", (conn->type == NETCONN_TCP));
grzemich 0:d7bd7384a37c 742 LWIP_ASSERT("conn must be in state NETCONN_CLOSE", (conn->state == NETCONN_CLOSE));
grzemich 0:d7bd7384a37c 743 LWIP_ASSERT("pcb already closed", (conn->pcb.tcp != NULL));
grzemich 0:d7bd7384a37c 744 LWIP_ASSERT("conn->current_msg != NULL", conn->current_msg != NULL);
grzemich 0:d7bd7384a37c 745
grzemich 0:d7bd7384a37c 746 shut = conn->current_msg->msg.sd.shut;
grzemich 0:d7bd7384a37c 747 shut_rx = shut & NETCONN_SHUT_RD;
grzemich 0:d7bd7384a37c 748 shut_tx = shut & NETCONN_SHUT_WR;
grzemich 0:d7bd7384a37c 749 /* shutting down both ends is the same as closing */
grzemich 0:d7bd7384a37c 750 close = shut == NETCONN_SHUT_RDWR;
grzemich 0:d7bd7384a37c 751
grzemich 0:d7bd7384a37c 752 /* Set back some callback pointers */
grzemich 0:d7bd7384a37c 753 if (close) {
grzemich 0:d7bd7384a37c 754 tcp_arg(conn->pcb.tcp, NULL);
grzemich 0:d7bd7384a37c 755 }
grzemich 0:d7bd7384a37c 756 if (conn->pcb.tcp->state == LISTEN) {
grzemich 0:d7bd7384a37c 757 tcp_accept(conn->pcb.tcp, NULL);
grzemich 0:d7bd7384a37c 758 } else {
grzemich 0:d7bd7384a37c 759 /* some callbacks have to be reset if tcp_close is not successful */
grzemich 0:d7bd7384a37c 760 if (shut_rx) {
grzemich 0:d7bd7384a37c 761 tcp_recv(conn->pcb.tcp, NULL);
grzemich 0:d7bd7384a37c 762 tcp_accept(conn->pcb.tcp, NULL);
grzemich 0:d7bd7384a37c 763 }
grzemich 0:d7bd7384a37c 764 if (shut_tx) {
grzemich 0:d7bd7384a37c 765 tcp_sent(conn->pcb.tcp, NULL);
grzemich 0:d7bd7384a37c 766 }
grzemich 0:d7bd7384a37c 767 if (close) {
grzemich 0:d7bd7384a37c 768 tcp_poll(conn->pcb.tcp, NULL, 4);
grzemich 0:d7bd7384a37c 769 tcp_err(conn->pcb.tcp, NULL);
grzemich 0:d7bd7384a37c 770 }
grzemich 0:d7bd7384a37c 771 }
grzemich 0:d7bd7384a37c 772 /* Try to close the connection */
grzemich 0:d7bd7384a37c 773 if (shut == NETCONN_SHUT_RDWR) {
grzemich 0:d7bd7384a37c 774 err = tcp_close(conn->pcb.tcp);
grzemich 0:d7bd7384a37c 775 } else {
grzemich 0:d7bd7384a37c 776 err = tcp_shutdown(conn->pcb.tcp, shut & NETCONN_SHUT_RD, shut & NETCONN_SHUT_WR);
grzemich 0:d7bd7384a37c 777 }
grzemich 0:d7bd7384a37c 778 if (err == ERR_OK) {
grzemich 0:d7bd7384a37c 779 /* Closing succeeded */
grzemich 0:d7bd7384a37c 780 conn->current_msg->err = ERR_OK;
grzemich 0:d7bd7384a37c 781 conn->current_msg = NULL;
grzemich 0:d7bd7384a37c 782 conn->state = NETCONN_NONE;
grzemich 0:d7bd7384a37c 783 /* Set back some callback pointers as conn is going away */
grzemich 0:d7bd7384a37c 784 conn->pcb.tcp = NULL;
grzemich 0:d7bd7384a37c 785 /* Trigger select() in socket layer. Make sure everybody notices activity
grzemich 0:d7bd7384a37c 786 on the connection, error first! */
grzemich 0:d7bd7384a37c 787 if (close) {
grzemich 0:d7bd7384a37c 788 API_EVENT(conn, NETCONN_EVT_ERROR, 0);
grzemich 0:d7bd7384a37c 789 }
grzemich 0:d7bd7384a37c 790 if (shut_rx) {
grzemich 0:d7bd7384a37c 791 API_EVENT(conn, NETCONN_EVT_RCVPLUS, 0);
grzemich 0:d7bd7384a37c 792 }
grzemich 0:d7bd7384a37c 793 if (shut_tx) {
grzemich 0:d7bd7384a37c 794 API_EVENT(conn, NETCONN_EVT_SENDPLUS, 0);
grzemich 0:d7bd7384a37c 795 }
grzemich 0:d7bd7384a37c 796 /* wake up the application task */
grzemich 0:d7bd7384a37c 797 sys_sem_signal(&conn->op_completed);
grzemich 0:d7bd7384a37c 798 } else {
grzemich 0:d7bd7384a37c 799 /* Closing failed, restore some of the callbacks */
grzemich 0:d7bd7384a37c 800 /* Closing of listen pcb will never fail! */
grzemich 0:d7bd7384a37c 801 LWIP_ASSERT("Closing a listen pcb may not fail!", (conn->pcb.tcp->state != LISTEN));
grzemich 0:d7bd7384a37c 802 tcp_sent(conn->pcb.tcp, sent_tcp);
grzemich 0:d7bd7384a37c 803 tcp_poll(conn->pcb.tcp, poll_tcp, 4);
grzemich 0:d7bd7384a37c 804 tcp_err(conn->pcb.tcp, err_tcp);
grzemich 0:d7bd7384a37c 805 tcp_arg(conn->pcb.tcp, conn);
grzemich 0:d7bd7384a37c 806 /* don't restore recv callback: we don't want to receive any more data */
grzemich 0:d7bd7384a37c 807 }
grzemich 0:d7bd7384a37c 808 /* If closing didn't succeed, we get called again either
grzemich 0:d7bd7384a37c 809 from poll_tcp or from sent_tcp */
grzemich 0:d7bd7384a37c 810 }
grzemich 0:d7bd7384a37c 811 #endif /* LWIP_TCP */
grzemich 0:d7bd7384a37c 812
grzemich 0:d7bd7384a37c 813 /**
grzemich 0:d7bd7384a37c 814 * Delete the pcb inside a netconn.
grzemich 0:d7bd7384a37c 815 * Called from netconn_delete.
grzemich 0:d7bd7384a37c 816 *
grzemich 0:d7bd7384a37c 817 * @param msg the api_msg_msg pointing to the connection
grzemich 0:d7bd7384a37c 818 */
grzemich 0:d7bd7384a37c 819 void
grzemich 0:d7bd7384a37c 820 do_delconn(struct api_msg_msg *msg)
grzemich 0:d7bd7384a37c 821 {
grzemich 0:d7bd7384a37c 822 /* @todo TCP: abort running write/connect? */
grzemich 0:d7bd7384a37c 823 if ((msg->conn->state != NETCONN_NONE) &&
grzemich 0:d7bd7384a37c 824 (msg->conn->state != NETCONN_LISTEN) &&
grzemich 0:d7bd7384a37c 825 (msg->conn->state != NETCONN_CONNECT)) {
grzemich 0:d7bd7384a37c 826 /* this only happens for TCP netconns */
grzemich 0:d7bd7384a37c 827 LWIP_ASSERT("msg->conn->type == NETCONN_TCP", msg->conn->type == NETCONN_TCP);
grzemich 0:d7bd7384a37c 828 msg->err = ERR_INPROGRESS;
grzemich 0:d7bd7384a37c 829 } else {
grzemich 0:d7bd7384a37c 830 LWIP_ASSERT("blocking connect in progress",
grzemich 0:d7bd7384a37c 831 (msg->conn->state != NETCONN_CONNECT) || IN_NONBLOCKING_CONNECT(msg->conn));
grzemich 0:d7bd7384a37c 832 /* Drain and delete mboxes */
grzemich 0:d7bd7384a37c 833 netconn_drain(msg->conn);
grzemich 0:d7bd7384a37c 834
grzemich 0:d7bd7384a37c 835 if (msg->conn->pcb.tcp != NULL) {
grzemich 0:d7bd7384a37c 836
grzemich 0:d7bd7384a37c 837 switch (NETCONNTYPE_GROUP(msg->conn->type)) {
grzemich 0:d7bd7384a37c 838 #if LWIP_RAW
grzemich 0:d7bd7384a37c 839 case NETCONN_RAW:
grzemich 0:d7bd7384a37c 840 raw_remove(msg->conn->pcb.raw);
grzemich 0:d7bd7384a37c 841 break;
grzemich 0:d7bd7384a37c 842 #endif /* LWIP_RAW */
grzemich 0:d7bd7384a37c 843 #if LWIP_UDP
grzemich 0:d7bd7384a37c 844 case NETCONN_UDP:
grzemich 0:d7bd7384a37c 845 msg->conn->pcb.udp->recv_arg = NULL;
grzemich 0:d7bd7384a37c 846 udp_remove(msg->conn->pcb.udp);
grzemich 0:d7bd7384a37c 847 break;
grzemich 0:d7bd7384a37c 848 #endif /* LWIP_UDP */
grzemich 0:d7bd7384a37c 849 #if LWIP_TCP
grzemich 0:d7bd7384a37c 850 case NETCONN_TCP:
grzemich 0:d7bd7384a37c 851 LWIP_ASSERT("already writing or closing", msg->conn->current_msg == NULL &&
grzemich 0:d7bd7384a37c 852 msg->conn->write_offset == 0);
grzemich 0:d7bd7384a37c 853 msg->conn->state = NETCONN_CLOSE;
grzemich 0:d7bd7384a37c 854 msg->msg.sd.shut = NETCONN_SHUT_RDWR;
grzemich 0:d7bd7384a37c 855 msg->conn->current_msg = msg;
grzemich 0:d7bd7384a37c 856 do_close_internal(msg->conn);
grzemich 0:d7bd7384a37c 857 /* API_EVENT is called inside do_close_internal, before releasing
grzemich 0:d7bd7384a37c 858 the application thread, so we can return at this point! */
grzemich 0:d7bd7384a37c 859 return;
grzemich 0:d7bd7384a37c 860 #endif /* LWIP_TCP */
grzemich 0:d7bd7384a37c 861 default:
grzemich 0:d7bd7384a37c 862 break;
grzemich 0:d7bd7384a37c 863 }
grzemich 0:d7bd7384a37c 864 msg->conn->pcb.tcp = NULL;
grzemich 0:d7bd7384a37c 865 }
grzemich 0:d7bd7384a37c 866 /* tcp netconns don't come here! */
grzemich 0:d7bd7384a37c 867
grzemich 0:d7bd7384a37c 868 /* @todo: this lets select make the socket readable and writable,
grzemich 0:d7bd7384a37c 869 which is wrong! errfd instead? */
grzemich 0:d7bd7384a37c 870 API_EVENT(msg->conn, NETCONN_EVT_RCVPLUS, 0);
grzemich 0:d7bd7384a37c 871 API_EVENT(msg->conn, NETCONN_EVT_SENDPLUS, 0);
grzemich 0:d7bd7384a37c 872 }
grzemich 0:d7bd7384a37c 873 if (sys_sem_valid(&msg->conn->op_completed)) {
grzemich 0:d7bd7384a37c 874 sys_sem_signal(&msg->conn->op_completed);
grzemich 0:d7bd7384a37c 875 }
grzemich 0:d7bd7384a37c 876 }
grzemich 0:d7bd7384a37c 877
grzemich 0:d7bd7384a37c 878 /**
grzemich 0:d7bd7384a37c 879 * Bind a pcb contained in a netconn
grzemich 0:d7bd7384a37c 880 * Called from netconn_bind.
grzemich 0:d7bd7384a37c 881 *
grzemich 0:d7bd7384a37c 882 * @param msg the api_msg_msg pointing to the connection and containing
grzemich 0:d7bd7384a37c 883 * the IP address and port to bind to
grzemich 0:d7bd7384a37c 884 */
grzemich 0:d7bd7384a37c 885 void
grzemich 0:d7bd7384a37c 886 do_bind(struct api_msg_msg *msg)
grzemich 0:d7bd7384a37c 887 {
grzemich 0:d7bd7384a37c 888 if (ERR_IS_FATAL(msg->conn->last_err)) {
grzemich 0:d7bd7384a37c 889 msg->err = msg->conn->last_err;
grzemich 0:d7bd7384a37c 890 } else {
grzemich 0:d7bd7384a37c 891 msg->err = ERR_VAL;
grzemich 0:d7bd7384a37c 892 if (msg->conn->pcb.tcp != NULL) {
grzemich 0:d7bd7384a37c 893 switch (NETCONNTYPE_GROUP(msg->conn->type)) {
grzemich 0:d7bd7384a37c 894 #if LWIP_RAW
grzemich 0:d7bd7384a37c 895 case NETCONN_RAW:
grzemich 0:d7bd7384a37c 896 msg->err = raw_bind(msg->conn->pcb.raw, msg->msg.bc.ipaddr);
grzemich 0:d7bd7384a37c 897 break;
grzemich 0:d7bd7384a37c 898 #endif /* LWIP_RAW */
grzemich 0:d7bd7384a37c 899 #if LWIP_UDP
grzemich 0:d7bd7384a37c 900 case NETCONN_UDP:
grzemich 0:d7bd7384a37c 901 msg->err = udp_bind(msg->conn->pcb.udp, msg->msg.bc.ipaddr, msg->msg.bc.port);
grzemich 0:d7bd7384a37c 902 break;
grzemich 0:d7bd7384a37c 903 #endif /* LWIP_UDP */
grzemich 0:d7bd7384a37c 904 #if LWIP_TCP
grzemich 0:d7bd7384a37c 905 case NETCONN_TCP:
grzemich 0:d7bd7384a37c 906 msg->err = tcp_bind(msg->conn->pcb.tcp, msg->msg.bc.ipaddr, msg->msg.bc.port);
grzemich 0:d7bd7384a37c 907 break;
grzemich 0:d7bd7384a37c 908 #endif /* LWIP_TCP */
grzemich 0:d7bd7384a37c 909 default:
grzemich 0:d7bd7384a37c 910 break;
grzemich 0:d7bd7384a37c 911 }
grzemich 0:d7bd7384a37c 912 }
grzemich 0:d7bd7384a37c 913 }
grzemich 0:d7bd7384a37c 914 TCPIP_APIMSG_ACK(msg);
grzemich 0:d7bd7384a37c 915 }
grzemich 0:d7bd7384a37c 916
grzemich 0:d7bd7384a37c 917 #if LWIP_TCP
grzemich 0:d7bd7384a37c 918 /**
grzemich 0:d7bd7384a37c 919 * TCP callback function if a connection (opened by tcp_connect/do_connect) has
grzemich 0:d7bd7384a37c 920 * been established (or reset by the remote host).
grzemich 0:d7bd7384a37c 921 *
grzemich 0:d7bd7384a37c 922 * @see tcp.h (struct tcp_pcb.connected) for parameters and return values
grzemich 0:d7bd7384a37c 923 */
grzemich 0:d7bd7384a37c 924 static err_t
grzemich 0:d7bd7384a37c 925 do_connected(void *arg, struct tcp_pcb *pcb, err_t err)
grzemich 0:d7bd7384a37c 926 {
grzemich 0:d7bd7384a37c 927 struct netconn *conn;
grzemich 0:d7bd7384a37c 928 int was_blocking;
grzemich 0:d7bd7384a37c 929
grzemich 0:d7bd7384a37c 930 LWIP_UNUSED_ARG(pcb);
grzemich 0:d7bd7384a37c 931
grzemich 0:d7bd7384a37c 932 conn = (struct netconn *)arg;
grzemich 0:d7bd7384a37c 933
grzemich 0:d7bd7384a37c 934 if (conn == NULL) {
grzemich 0:d7bd7384a37c 935 return ERR_VAL;
grzemich 0:d7bd7384a37c 936 }
grzemich 0:d7bd7384a37c 937
grzemich 0:d7bd7384a37c 938 LWIP_ASSERT("conn->state == NETCONN_CONNECT", conn->state == NETCONN_CONNECT);
grzemich 0:d7bd7384a37c 939 LWIP_ASSERT("(conn->current_msg != NULL) || conn->in_non_blocking_connect",
grzemich 0:d7bd7384a37c 940 (conn->current_msg != NULL) || IN_NONBLOCKING_CONNECT(conn));
grzemich 0:d7bd7384a37c 941
grzemich 0:d7bd7384a37c 942 if (conn->current_msg != NULL) {
grzemich 0:d7bd7384a37c 943 conn->current_msg->err = err;
grzemich 0:d7bd7384a37c 944 }
grzemich 0:d7bd7384a37c 945 if ((conn->type == NETCONN_TCP) && (err == ERR_OK)) {
grzemich 0:d7bd7384a37c 946 setup_tcp(conn);
grzemich 0:d7bd7384a37c 947 }
grzemich 0:d7bd7384a37c 948 was_blocking = !IN_NONBLOCKING_CONNECT(conn);
grzemich 0:d7bd7384a37c 949 SET_NONBLOCKING_CONNECT(conn, 0);
grzemich 0:d7bd7384a37c 950 conn->current_msg = NULL;
grzemich 0:d7bd7384a37c 951 conn->state = NETCONN_NONE;
grzemich 0:d7bd7384a37c 952 if (!was_blocking) {
grzemich 0:d7bd7384a37c 953 NETCONN_SET_SAFE_ERR(conn, ERR_OK);
grzemich 0:d7bd7384a37c 954 }
grzemich 0:d7bd7384a37c 955 API_EVENT(conn, NETCONN_EVT_SENDPLUS, 0);
grzemich 0:d7bd7384a37c 956
grzemich 0:d7bd7384a37c 957 if (was_blocking) {
grzemich 0:d7bd7384a37c 958 sys_sem_signal(&conn->op_completed);
grzemich 0:d7bd7384a37c 959 }
grzemich 0:d7bd7384a37c 960 return ERR_OK;
grzemich 0:d7bd7384a37c 961 }
grzemich 0:d7bd7384a37c 962 #endif /* LWIP_TCP */
grzemich 0:d7bd7384a37c 963
grzemich 0:d7bd7384a37c 964 /**
grzemich 0:d7bd7384a37c 965 * Connect a pcb contained inside a netconn
grzemich 0:d7bd7384a37c 966 * Called from netconn_connect.
grzemich 0:d7bd7384a37c 967 *
grzemich 0:d7bd7384a37c 968 * @param msg the api_msg_msg pointing to the connection and containing
grzemich 0:d7bd7384a37c 969 * the IP address and port to connect to
grzemich 0:d7bd7384a37c 970 */
grzemich 0:d7bd7384a37c 971 void
grzemich 0:d7bd7384a37c 972 do_connect(struct api_msg_msg *msg)
grzemich 0:d7bd7384a37c 973 {
grzemich 0:d7bd7384a37c 974 if (msg->conn->pcb.tcp == NULL) {
grzemich 0:d7bd7384a37c 975 /* This may happen when calling netconn_connect() a second time */
grzemich 0:d7bd7384a37c 976 msg->err = ERR_CLSD;
grzemich 0:d7bd7384a37c 977 } else {
grzemich 0:d7bd7384a37c 978 switch (NETCONNTYPE_GROUP(msg->conn->type)) {
grzemich 0:d7bd7384a37c 979 #if LWIP_RAW
grzemich 0:d7bd7384a37c 980 case NETCONN_RAW:
grzemich 0:d7bd7384a37c 981 msg->err = raw_connect(msg->conn->pcb.raw, msg->msg.bc.ipaddr);
grzemich 0:d7bd7384a37c 982 break;
grzemich 0:d7bd7384a37c 983 #endif /* LWIP_RAW */
grzemich 0:d7bd7384a37c 984 #if LWIP_UDP
grzemich 0:d7bd7384a37c 985 case NETCONN_UDP:
grzemich 0:d7bd7384a37c 986 msg->err = udp_connect(msg->conn->pcb.udp, msg->msg.bc.ipaddr, msg->msg.bc.port);
grzemich 0:d7bd7384a37c 987 break;
grzemich 0:d7bd7384a37c 988 #endif /* LWIP_UDP */
grzemich 0:d7bd7384a37c 989 #if LWIP_TCP
grzemich 0:d7bd7384a37c 990 case NETCONN_TCP:
grzemich 0:d7bd7384a37c 991 /* Prevent connect while doing any other action. */
grzemich 0:d7bd7384a37c 992 if (msg->conn->state != NETCONN_NONE) {
grzemich 0:d7bd7384a37c 993 msg->err = ERR_ISCONN;
grzemich 0:d7bd7384a37c 994 } else {
grzemich 0:d7bd7384a37c 995 setup_tcp(msg->conn);
grzemich 0:d7bd7384a37c 996 msg->err = tcp_connect(msg->conn->pcb.tcp, msg->msg.bc.ipaddr,
grzemich 0:d7bd7384a37c 997 msg->msg.bc.port, do_connected);
grzemich 0:d7bd7384a37c 998 if (msg->err == ERR_OK) {
grzemich 0:d7bd7384a37c 999 u8_t non_blocking = netconn_is_nonblocking(msg->conn);
grzemich 0:d7bd7384a37c 1000 msg->conn->state = NETCONN_CONNECT;
grzemich 0:d7bd7384a37c 1001 SET_NONBLOCKING_CONNECT(msg->conn, non_blocking);
grzemich 0:d7bd7384a37c 1002 if (non_blocking) {
grzemich 0:d7bd7384a37c 1003 msg->err = ERR_INPROGRESS;
grzemich 0:d7bd7384a37c 1004 } else {
grzemich 0:d7bd7384a37c 1005 msg->conn->current_msg = msg;
grzemich 0:d7bd7384a37c 1006 /* sys_sem_signal() is called from do_connected (or err_tcp()),
grzemich 0:d7bd7384a37c 1007 * when the connection is established! */
grzemich 0:d7bd7384a37c 1008 return;
grzemich 0:d7bd7384a37c 1009 }
grzemich 0:d7bd7384a37c 1010 }
grzemich 0:d7bd7384a37c 1011 }
grzemich 0:d7bd7384a37c 1012 break;
grzemich 0:d7bd7384a37c 1013 #endif /* LWIP_TCP */
grzemich 0:d7bd7384a37c 1014 default:
grzemich 0:d7bd7384a37c 1015 LWIP_ERROR("Invalid netconn type", 0, do{ msg->err = ERR_VAL; }while(0));
grzemich 0:d7bd7384a37c 1016 break;
grzemich 0:d7bd7384a37c 1017 }
grzemich 0:d7bd7384a37c 1018 }
grzemich 0:d7bd7384a37c 1019 sys_sem_signal(&msg->conn->op_completed);
grzemich 0:d7bd7384a37c 1020 }
grzemich 0:d7bd7384a37c 1021
grzemich 0:d7bd7384a37c 1022 /**
grzemich 0:d7bd7384a37c 1023 * Connect a pcb contained inside a netconn
grzemich 0:d7bd7384a37c 1024 * Only used for UDP netconns.
grzemich 0:d7bd7384a37c 1025 * Called from netconn_disconnect.
grzemich 0:d7bd7384a37c 1026 *
grzemich 0:d7bd7384a37c 1027 * @param msg the api_msg_msg pointing to the connection to disconnect
grzemich 0:d7bd7384a37c 1028 */
grzemich 0:d7bd7384a37c 1029 void
grzemich 0:d7bd7384a37c 1030 do_disconnect(struct api_msg_msg *msg)
grzemich 0:d7bd7384a37c 1031 {
grzemich 0:d7bd7384a37c 1032 #if LWIP_UDP
grzemich 0:d7bd7384a37c 1033 if (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_UDP) {
grzemich 0:d7bd7384a37c 1034 udp_disconnect(msg->conn->pcb.udp);
grzemich 0:d7bd7384a37c 1035 msg->err = ERR_OK;
grzemich 0:d7bd7384a37c 1036 } else
grzemich 0:d7bd7384a37c 1037 #endif /* LWIP_UDP */
grzemich 0:d7bd7384a37c 1038 {
grzemich 0:d7bd7384a37c 1039 msg->err = ERR_VAL;
grzemich 0:d7bd7384a37c 1040 }
grzemich 0:d7bd7384a37c 1041 TCPIP_APIMSG_ACK(msg);
grzemich 0:d7bd7384a37c 1042 }
grzemich 0:d7bd7384a37c 1043
grzemich 0:d7bd7384a37c 1044 #if LWIP_TCP
grzemich 0:d7bd7384a37c 1045 /**
grzemich 0:d7bd7384a37c 1046 * Set a TCP pcb contained in a netconn into listen mode
grzemich 0:d7bd7384a37c 1047 * Called from netconn_listen.
grzemich 0:d7bd7384a37c 1048 *
grzemich 0:d7bd7384a37c 1049 * @param msg the api_msg_msg pointing to the connection
grzemich 0:d7bd7384a37c 1050 */
grzemich 0:d7bd7384a37c 1051 void
grzemich 0:d7bd7384a37c 1052 do_listen(struct api_msg_msg *msg)
grzemich 0:d7bd7384a37c 1053 {
grzemich 0:d7bd7384a37c 1054 if (ERR_IS_FATAL(msg->conn->last_err)) {
grzemich 0:d7bd7384a37c 1055 msg->err = msg->conn->last_err;
grzemich 0:d7bd7384a37c 1056 } else {
grzemich 0:d7bd7384a37c 1057 msg->err = ERR_CONN;
grzemich 0:d7bd7384a37c 1058 if (msg->conn->pcb.tcp != NULL) {
grzemich 0:d7bd7384a37c 1059 if (msg->conn->type == NETCONN_TCP) {
grzemich 0:d7bd7384a37c 1060 if (msg->conn->state == NETCONN_NONE) {
grzemich 0:d7bd7384a37c 1061 #if TCP_LISTEN_BACKLOG
grzemich 0:d7bd7384a37c 1062 struct tcp_pcb* lpcb = tcp_listen_with_backlog(msg->conn->pcb.tcp, msg->msg.lb.backlog);
grzemich 0:d7bd7384a37c 1063 #else /* TCP_LISTEN_BACKLOG */
grzemich 0:d7bd7384a37c 1064 struct tcp_pcb* lpcb = tcp_listen(msg->conn->pcb.tcp);
grzemich 0:d7bd7384a37c 1065 #endif /* TCP_LISTEN_BACKLOG */
grzemich 0:d7bd7384a37c 1066 if (lpcb == NULL) {
grzemich 0:d7bd7384a37c 1067 /* in this case, the old pcb is still allocated */
grzemich 0:d7bd7384a37c 1068 msg->err = ERR_MEM;
grzemich 0:d7bd7384a37c 1069 } else {
grzemich 0:d7bd7384a37c 1070 /* delete the recvmbox and allocate the acceptmbox */
grzemich 0:d7bd7384a37c 1071 if (sys_mbox_valid(&msg->conn->recvmbox)) {
grzemich 0:d7bd7384a37c 1072 /** @todo: should we drain the recvmbox here? */
grzemich 0:d7bd7384a37c 1073 sys_mbox_free(&msg->conn->recvmbox);
grzemich 0:d7bd7384a37c 1074 sys_mbox_set_invalid(&msg->conn->recvmbox);
grzemich 0:d7bd7384a37c 1075 }
grzemich 0:d7bd7384a37c 1076 msg->err = ERR_OK;
grzemich 0:d7bd7384a37c 1077 if (!sys_mbox_valid(&msg->conn->acceptmbox)) {
grzemich 0:d7bd7384a37c 1078 msg->err = sys_mbox_new(&msg->conn->acceptmbox, DEFAULT_ACCEPTMBOX_SIZE);
grzemich 0:d7bd7384a37c 1079 }
grzemich 0:d7bd7384a37c 1080 if (msg->err == ERR_OK) {
grzemich 0:d7bd7384a37c 1081 msg->conn->state = NETCONN_LISTEN;
grzemich 0:d7bd7384a37c 1082 msg->conn->pcb.tcp = lpcb;
grzemich 0:d7bd7384a37c 1083 tcp_arg(msg->conn->pcb.tcp, msg->conn);
grzemich 0:d7bd7384a37c 1084 tcp_accept(msg->conn->pcb.tcp, accept_function);
grzemich 0:d7bd7384a37c 1085 } else {
grzemich 0:d7bd7384a37c 1086 /* since the old pcb is already deallocated, free lpcb now */
grzemich 0:d7bd7384a37c 1087 tcp_close(lpcb);
grzemich 0:d7bd7384a37c 1088 msg->conn->pcb.tcp = NULL;
grzemich 0:d7bd7384a37c 1089 }
grzemich 0:d7bd7384a37c 1090 }
grzemich 0:d7bd7384a37c 1091 }
grzemich 0:d7bd7384a37c 1092 }
grzemich 0:d7bd7384a37c 1093 }
grzemich 0:d7bd7384a37c 1094 }
grzemich 0:d7bd7384a37c 1095 TCPIP_APIMSG_ACK(msg);
grzemich 0:d7bd7384a37c 1096 }
grzemich 0:d7bd7384a37c 1097 #endif /* LWIP_TCP */
grzemich 0:d7bd7384a37c 1098
grzemich 0:d7bd7384a37c 1099 /**
grzemich 0:d7bd7384a37c 1100 * Send some data on a RAW or UDP pcb contained in a netconn
grzemich 0:d7bd7384a37c 1101 * Called from netconn_send
grzemich 0:d7bd7384a37c 1102 *
grzemich 0:d7bd7384a37c 1103 * @param msg the api_msg_msg pointing to the connection
grzemich 0:d7bd7384a37c 1104 */
grzemich 0:d7bd7384a37c 1105 void
grzemich 0:d7bd7384a37c 1106 do_send(struct api_msg_msg *msg)
grzemich 0:d7bd7384a37c 1107 {
grzemich 0:d7bd7384a37c 1108 if (ERR_IS_FATAL(msg->conn->last_err)) {
grzemich 0:d7bd7384a37c 1109 msg->err = msg->conn->last_err;
grzemich 0:d7bd7384a37c 1110 } else {
grzemich 0:d7bd7384a37c 1111 msg->err = ERR_CONN;
grzemich 0:d7bd7384a37c 1112 if (msg->conn->pcb.tcp != NULL) {
grzemich 0:d7bd7384a37c 1113 switch (NETCONNTYPE_GROUP(msg->conn->type)) {
grzemich 0:d7bd7384a37c 1114 #if LWIP_RAW
grzemich 0:d7bd7384a37c 1115 case NETCONN_RAW:
grzemich 0:d7bd7384a37c 1116 if (ip_addr_isany(&msg->msg.b->addr)) {
grzemich 0:d7bd7384a37c 1117 msg->err = raw_send(msg->conn->pcb.raw, msg->msg.b->p);
grzemich 0:d7bd7384a37c 1118 } else {
grzemich 0:d7bd7384a37c 1119 msg->err = raw_sendto(msg->conn->pcb.raw, msg->msg.b->p, &msg->msg.b->addr);
grzemich 0:d7bd7384a37c 1120 }
grzemich 0:d7bd7384a37c 1121 break;
grzemich 0:d7bd7384a37c 1122 #endif
grzemich 0:d7bd7384a37c 1123 #if LWIP_UDP
grzemich 0:d7bd7384a37c 1124 case NETCONN_UDP:
grzemich 0:d7bd7384a37c 1125 #if LWIP_CHECKSUM_ON_COPY
grzemich 0:d7bd7384a37c 1126 if (ip_addr_isany(&msg->msg.b->addr)) {
grzemich 0:d7bd7384a37c 1127 msg->err = udp_send_chksum(msg->conn->pcb.udp, msg->msg.b->p,
grzemich 0:d7bd7384a37c 1128 msg->msg.b->flags & NETBUF_FLAG_CHKSUM, msg->msg.b->toport_chksum);
grzemich 0:d7bd7384a37c 1129 } else {
grzemich 0:d7bd7384a37c 1130 msg->err = udp_sendto_chksum(msg->conn->pcb.udp, msg->msg.b->p,
grzemich 0:d7bd7384a37c 1131 &msg->msg.b->addr, msg->msg.b->port,
grzemich 0:d7bd7384a37c 1132 msg->msg.b->flags & NETBUF_FLAG_CHKSUM, msg->msg.b->toport_chksum);
grzemich 0:d7bd7384a37c 1133 }
grzemich 0:d7bd7384a37c 1134 #else /* LWIP_CHECKSUM_ON_COPY */
grzemich 0:d7bd7384a37c 1135 if (ip_addr_isany(&msg->msg.b->addr)) {
grzemich 0:d7bd7384a37c 1136 msg->err = udp_send(msg->conn->pcb.udp, msg->msg.b->p);
grzemich 0:d7bd7384a37c 1137 } else {
grzemich 0:d7bd7384a37c 1138 msg->err = udp_sendto(msg->conn->pcb.udp, msg->msg.b->p, &msg->msg.b->addr, msg->msg.b->port);
grzemich 0:d7bd7384a37c 1139 }
grzemich 0:d7bd7384a37c 1140 #endif /* LWIP_CHECKSUM_ON_COPY */
grzemich 0:d7bd7384a37c 1141 break;
grzemich 0:d7bd7384a37c 1142 #endif /* LWIP_UDP */
grzemich 0:d7bd7384a37c 1143 default:
grzemich 0:d7bd7384a37c 1144 break;
grzemich 0:d7bd7384a37c 1145 }
grzemich 0:d7bd7384a37c 1146 }
grzemich 0:d7bd7384a37c 1147 }
grzemich 0:d7bd7384a37c 1148 TCPIP_APIMSG_ACK(msg);
grzemich 0:d7bd7384a37c 1149 }
grzemich 0:d7bd7384a37c 1150
grzemich 0:d7bd7384a37c 1151 #if LWIP_TCP
grzemich 0:d7bd7384a37c 1152 /**
grzemich 0:d7bd7384a37c 1153 * Indicate data has been received from a TCP pcb contained in a netconn
grzemich 0:d7bd7384a37c 1154 * Called from netconn_recv
grzemich 0:d7bd7384a37c 1155 *
grzemich 0:d7bd7384a37c 1156 * @param msg the api_msg_msg pointing to the connection
grzemich 0:d7bd7384a37c 1157 */
grzemich 0:d7bd7384a37c 1158 void
grzemich 0:d7bd7384a37c 1159 do_recv(struct api_msg_msg *msg)
grzemich 0:d7bd7384a37c 1160 {
grzemich 0:d7bd7384a37c 1161 msg->err = ERR_OK;
grzemich 0:d7bd7384a37c 1162 if (msg->conn->pcb.tcp != NULL) {
grzemich 0:d7bd7384a37c 1163 if (msg->conn->type == NETCONN_TCP) {
grzemich 0:d7bd7384a37c 1164 #if TCP_LISTEN_BACKLOG
grzemich 0:d7bd7384a37c 1165 if (msg->conn->pcb.tcp->state == LISTEN) {
grzemich 0:d7bd7384a37c 1166 tcp_accepted(msg->conn->pcb.tcp);
grzemich 0:d7bd7384a37c 1167 } else
grzemich 0:d7bd7384a37c 1168 #endif /* TCP_LISTEN_BACKLOG */
grzemich 0:d7bd7384a37c 1169 {
grzemich 0:d7bd7384a37c 1170 u32_t remaining = msg->msg.r.len;
grzemich 0:d7bd7384a37c 1171 do {
grzemich 0:d7bd7384a37c 1172 u16_t recved = (remaining > 0xffff) ? 0xffff : (u16_t)remaining;
grzemich 0:d7bd7384a37c 1173 tcp_recved(msg->conn->pcb.tcp, recved);
grzemich 0:d7bd7384a37c 1174 remaining -= recved;
grzemich 0:d7bd7384a37c 1175 }while(remaining != 0);
grzemich 0:d7bd7384a37c 1176 }
grzemich 0:d7bd7384a37c 1177 }
grzemich 0:d7bd7384a37c 1178 }
grzemich 0:d7bd7384a37c 1179 TCPIP_APIMSG_ACK(msg);
grzemich 0:d7bd7384a37c 1180 }
grzemich 0:d7bd7384a37c 1181
grzemich 0:d7bd7384a37c 1182 /**
grzemich 0:d7bd7384a37c 1183 * See if more data needs to be written from a previous call to netconn_write.
grzemich 0:d7bd7384a37c 1184 * Called initially from do_write. If the first call can't send all data
grzemich 0:d7bd7384a37c 1185 * (because of low memory or empty send-buffer), this function is called again
grzemich 0:d7bd7384a37c 1186 * from sent_tcp() or poll_tcp() to send more data. If all data is sent, the
grzemich 0:d7bd7384a37c 1187 * blocking application thread (waiting in netconn_write) is released.
grzemich 0:d7bd7384a37c 1188 *
grzemich 0:d7bd7384a37c 1189 * @param conn netconn (that is currently in state NETCONN_WRITE) to process
grzemich 0:d7bd7384a37c 1190 * @return ERR_OK
grzemich 0:d7bd7384a37c 1191 * ERR_MEM if LWIP_TCPIP_CORE_LOCKING=1 and sending hasn't yet finished
grzemich 0:d7bd7384a37c 1192 */
grzemich 0:d7bd7384a37c 1193 static err_t
grzemich 0:d7bd7384a37c 1194 do_writemore(struct netconn *conn)
grzemich 0:d7bd7384a37c 1195 {
grzemich 0:d7bd7384a37c 1196 err_t err = ERR_OK;
grzemich 0:d7bd7384a37c 1197 void *dataptr;
grzemich 0:d7bd7384a37c 1198 u16_t len, available;
grzemich 0:d7bd7384a37c 1199 u8_t write_finished = 0;
grzemich 0:d7bd7384a37c 1200 size_t diff;
grzemich 0:d7bd7384a37c 1201 u8_t dontblock = netconn_is_nonblocking(conn) ||
grzemich 0:d7bd7384a37c 1202 (conn->current_msg->msg.w.apiflags & NETCONN_DONTBLOCK);
grzemich 0:d7bd7384a37c 1203 u8_t apiflags = conn->current_msg->msg.w.apiflags;
grzemich 0:d7bd7384a37c 1204
grzemich 0:d7bd7384a37c 1205 LWIP_ASSERT("conn != NULL", conn != NULL);
grzemich 0:d7bd7384a37c 1206 LWIP_ASSERT("conn->state == NETCONN_WRITE", (conn->state == NETCONN_WRITE));
grzemich 0:d7bd7384a37c 1207 LWIP_ASSERT("conn->current_msg != NULL", conn->current_msg != NULL);
grzemich 0:d7bd7384a37c 1208 LWIP_ASSERT("conn->pcb.tcp != NULL", conn->pcb.tcp != NULL);
grzemich 0:d7bd7384a37c 1209 LWIP_ASSERT("conn->write_offset < conn->current_msg->msg.w.len",
grzemich 0:d7bd7384a37c 1210 conn->write_offset < conn->current_msg->msg.w.len);
grzemich 0:d7bd7384a37c 1211
grzemich 0:d7bd7384a37c 1212 dataptr = (u8_t*)conn->current_msg->msg.w.dataptr + conn->write_offset;
grzemich 0:d7bd7384a37c 1213 diff = conn->current_msg->msg.w.len - conn->write_offset;
grzemich 0:d7bd7384a37c 1214 if (diff > 0xffffUL) { /* max_u16_t */
grzemich 0:d7bd7384a37c 1215 len = 0xffff;
grzemich 0:d7bd7384a37c 1216 #if LWIP_TCPIP_CORE_LOCKING
grzemich 0:d7bd7384a37c 1217 conn->flags |= NETCONN_FLAG_WRITE_DELAYED;
grzemich 0:d7bd7384a37c 1218 #endif
grzemich 0:d7bd7384a37c 1219 apiflags |= TCP_WRITE_FLAG_MORE;
grzemich 0:d7bd7384a37c 1220 } else {
grzemich 0:d7bd7384a37c 1221 len = (u16_t)diff;
grzemich 0:d7bd7384a37c 1222 }
grzemich 0:d7bd7384a37c 1223 available = tcp_sndbuf(conn->pcb.tcp);
grzemich 0:d7bd7384a37c 1224 if (available < len) {
grzemich 0:d7bd7384a37c 1225 /* don't try to write more than sendbuf */
grzemich 0:d7bd7384a37c 1226 len = available;
grzemich 0:d7bd7384a37c 1227 #if LWIP_TCPIP_CORE_LOCKING
grzemich 0:d7bd7384a37c 1228 conn->flags |= NETCONN_FLAG_WRITE_DELAYED;
grzemich 0:d7bd7384a37c 1229 #endif
grzemich 0:d7bd7384a37c 1230 apiflags |= TCP_WRITE_FLAG_MORE;
grzemich 0:d7bd7384a37c 1231 }
grzemich 0:d7bd7384a37c 1232 if (dontblock && (len < conn->current_msg->msg.w.len)) {
grzemich 0:d7bd7384a37c 1233 /* failed to send all data at once -> nonblocking write not possible */
grzemich 0:d7bd7384a37c 1234 err = ERR_MEM;
grzemich 0:d7bd7384a37c 1235 }
grzemich 0:d7bd7384a37c 1236 if (err == ERR_OK) {
grzemich 0:d7bd7384a37c 1237 LWIP_ASSERT("do_writemore: invalid length!", ((conn->write_offset + len) <= conn->current_msg->msg.w.len));
grzemich 0:d7bd7384a37c 1238 err = tcp_write(conn->pcb.tcp, dataptr, len, apiflags);
grzemich 0:d7bd7384a37c 1239 }
grzemich 0:d7bd7384a37c 1240 if (dontblock && (err == ERR_MEM)) {
grzemich 0:d7bd7384a37c 1241 /* nonblocking write failed */
grzemich 0:d7bd7384a37c 1242 write_finished = 1;
grzemich 0:d7bd7384a37c 1243 err = ERR_WOULDBLOCK;
grzemich 0:d7bd7384a37c 1244 /* let poll_tcp check writable space to mark the pcb
grzemich 0:d7bd7384a37c 1245 writable again */
grzemich 0:d7bd7384a37c 1246 conn->flags |= NETCONN_FLAG_CHECK_WRITESPACE;
grzemich 0:d7bd7384a37c 1247 /* let select mark this pcb as non-writable. */
grzemich 0:d7bd7384a37c 1248 API_EVENT(conn, NETCONN_EVT_SENDMINUS, len);
grzemich 0:d7bd7384a37c 1249 } else {
grzemich 0:d7bd7384a37c 1250 /* if OK or memory error, check available space */
grzemich 0:d7bd7384a37c 1251 if (((err == ERR_OK) || (err == ERR_MEM)) &&
grzemich 0:d7bd7384a37c 1252 ((tcp_sndbuf(conn->pcb.tcp) <= TCP_SNDLOWAT) ||
grzemich 0:d7bd7384a37c 1253 (tcp_sndqueuelen(conn->pcb.tcp) >= TCP_SNDQUEUELOWAT))) {
grzemich 0:d7bd7384a37c 1254 /* The queued byte- or pbuf-count exceeds the configured low-water limit,
grzemich 0:d7bd7384a37c 1255 let select mark this pcb as non-writable. */
grzemich 0:d7bd7384a37c 1256 API_EVENT(conn, NETCONN_EVT_SENDMINUS, len);
grzemich 0:d7bd7384a37c 1257 }
grzemich 0:d7bd7384a37c 1258
grzemich 0:d7bd7384a37c 1259 if (err == ERR_OK) {
grzemich 0:d7bd7384a37c 1260 conn->write_offset += len;
grzemich 0:d7bd7384a37c 1261 if (conn->write_offset == conn->current_msg->msg.w.len) {
grzemich 0:d7bd7384a37c 1262 /* everything was written */
grzemich 0:d7bd7384a37c 1263 write_finished = 1;
grzemich 0:d7bd7384a37c 1264 conn->write_offset = 0;
grzemich 0:d7bd7384a37c 1265 }
grzemich 0:d7bd7384a37c 1266 tcp_output(conn->pcb.tcp);
grzemich 0:d7bd7384a37c 1267 } else if (err == ERR_MEM) {
grzemich 0:d7bd7384a37c 1268 /* If ERR_MEM, we wait for sent_tcp or poll_tcp to be called
grzemich 0:d7bd7384a37c 1269 we do NOT return to the application thread, since ERR_MEM is
grzemich 0:d7bd7384a37c 1270 only a temporary error! */
grzemich 0:d7bd7384a37c 1271
grzemich 0:d7bd7384a37c 1272 /* tcp_write returned ERR_MEM, try tcp_output anyway */
grzemich 0:d7bd7384a37c 1273 tcp_output(conn->pcb.tcp);
grzemich 0:d7bd7384a37c 1274
grzemich 0:d7bd7384a37c 1275 #if LWIP_TCPIP_CORE_LOCKING
grzemich 0:d7bd7384a37c 1276 conn->flags |= NETCONN_FLAG_WRITE_DELAYED;
grzemich 0:d7bd7384a37c 1277 #endif
grzemich 0:d7bd7384a37c 1278 } else {
grzemich 0:d7bd7384a37c 1279 /* On errors != ERR_MEM, we don't try writing any more but return
grzemich 0:d7bd7384a37c 1280 the error to the application thread. */
grzemich 0:d7bd7384a37c 1281 write_finished = 1;
grzemich 0:d7bd7384a37c 1282 }
grzemich 0:d7bd7384a37c 1283 }
grzemich 0:d7bd7384a37c 1284
grzemich 0:d7bd7384a37c 1285 if (write_finished) {
grzemich 0:d7bd7384a37c 1286 /* everything was written: set back connection state
grzemich 0:d7bd7384a37c 1287 and back to application task */
grzemich 0:d7bd7384a37c 1288 conn->current_msg->err = err;
grzemich 0:d7bd7384a37c 1289 conn->current_msg = NULL;
grzemich 0:d7bd7384a37c 1290 conn->state = NETCONN_NONE;
grzemich 0:d7bd7384a37c 1291 #if LWIP_TCPIP_CORE_LOCKING
grzemich 0:d7bd7384a37c 1292 if ((conn->flags & NETCONN_FLAG_WRITE_DELAYED) != 0)
grzemich 0:d7bd7384a37c 1293 #endif
grzemich 0:d7bd7384a37c 1294 {
grzemich 0:d7bd7384a37c 1295 sys_sem_signal(&conn->op_completed);
grzemich 0:d7bd7384a37c 1296 }
grzemich 0:d7bd7384a37c 1297 }
grzemich 0:d7bd7384a37c 1298 #if LWIP_TCPIP_CORE_LOCKING
grzemich 0:d7bd7384a37c 1299 else
grzemich 0:d7bd7384a37c 1300 return ERR_MEM;
grzemich 0:d7bd7384a37c 1301 #endif
grzemich 0:d7bd7384a37c 1302 return ERR_OK;
grzemich 0:d7bd7384a37c 1303 }
grzemich 0:d7bd7384a37c 1304 #endif /* LWIP_TCP */
grzemich 0:d7bd7384a37c 1305
grzemich 0:d7bd7384a37c 1306 /**
grzemich 0:d7bd7384a37c 1307 * Send some data on a TCP pcb contained in a netconn
grzemich 0:d7bd7384a37c 1308 * Called from netconn_write
grzemich 0:d7bd7384a37c 1309 *
grzemich 0:d7bd7384a37c 1310 * @param msg the api_msg_msg pointing to the connection
grzemich 0:d7bd7384a37c 1311 */
grzemich 0:d7bd7384a37c 1312 void
grzemich 0:d7bd7384a37c 1313 do_write(struct api_msg_msg *msg)
grzemich 0:d7bd7384a37c 1314 {
grzemich 0:d7bd7384a37c 1315 if (ERR_IS_FATAL(msg->conn->last_err)) {
grzemich 0:d7bd7384a37c 1316 msg->err = msg->conn->last_err;
grzemich 0:d7bd7384a37c 1317 } else {
grzemich 0:d7bd7384a37c 1318 if (msg->conn->type == NETCONN_TCP) {
grzemich 0:d7bd7384a37c 1319 #if LWIP_TCP
grzemich 0:d7bd7384a37c 1320 if (msg->conn->state != NETCONN_NONE) {
grzemich 0:d7bd7384a37c 1321 /* netconn is connecting, closing or in blocking write */
grzemich 0:d7bd7384a37c 1322 msg->err = ERR_INPROGRESS;
grzemich 0:d7bd7384a37c 1323 } else if (msg->conn->pcb.tcp != NULL) {
grzemich 0:d7bd7384a37c 1324 msg->conn->state = NETCONN_WRITE;
grzemich 0:d7bd7384a37c 1325 /* set all the variables used by do_writemore */
grzemich 0:d7bd7384a37c 1326 LWIP_ASSERT("already writing or closing", msg->conn->current_msg == NULL &&
grzemich 0:d7bd7384a37c 1327 msg->conn->write_offset == 0);
grzemich 0:d7bd7384a37c 1328 LWIP_ASSERT("msg->msg.w.len != 0", msg->msg.w.len != 0);
grzemich 0:d7bd7384a37c 1329 msg->conn->current_msg = msg;
grzemich 0:d7bd7384a37c 1330 msg->conn->write_offset = 0;
grzemich 0:d7bd7384a37c 1331 #if LWIP_TCPIP_CORE_LOCKING
grzemich 0:d7bd7384a37c 1332 msg->conn->flags &= ~NETCONN_FLAG_WRITE_DELAYED;
grzemich 0:d7bd7384a37c 1333 if (do_writemore(msg->conn) != ERR_OK) {
grzemich 0:d7bd7384a37c 1334 LWIP_ASSERT("state!", msg->conn->state == NETCONN_WRITE);
grzemich 0:d7bd7384a37c 1335 UNLOCK_TCPIP_CORE();
grzemich 0:d7bd7384a37c 1336 sys_arch_sem_wait(&msg->conn->op_completed, 0);
grzemich 0:d7bd7384a37c 1337 LOCK_TCPIP_CORE();
grzemich 0:d7bd7384a37c 1338 LWIP_ASSERT("state!", msg->conn->state == NETCONN_NONE);
grzemich 0:d7bd7384a37c 1339 }
grzemich 0:d7bd7384a37c 1340 #else /* LWIP_TCPIP_CORE_LOCKING */
grzemich 0:d7bd7384a37c 1341 do_writemore(msg->conn);
grzemich 0:d7bd7384a37c 1342 #endif /* LWIP_TCPIP_CORE_LOCKING */
grzemich 0:d7bd7384a37c 1343 /* for both cases: if do_writemore was called, don't ACK the APIMSG
grzemich 0:d7bd7384a37c 1344 since do_writemore ACKs it! */
grzemich 0:d7bd7384a37c 1345 return;
grzemich 0:d7bd7384a37c 1346 } else {
grzemich 0:d7bd7384a37c 1347 msg->err = ERR_CONN;
grzemich 0:d7bd7384a37c 1348 }
grzemich 0:d7bd7384a37c 1349 #else /* LWIP_TCP */
grzemich 0:d7bd7384a37c 1350 msg->err = ERR_VAL;
grzemich 0:d7bd7384a37c 1351 #endif /* LWIP_TCP */
grzemich 0:d7bd7384a37c 1352 #if (LWIP_UDP || LWIP_RAW)
grzemich 0:d7bd7384a37c 1353 } else {
grzemich 0:d7bd7384a37c 1354 msg->err = ERR_VAL;
grzemich 0:d7bd7384a37c 1355 #endif /* (LWIP_UDP || LWIP_RAW) */
grzemich 0:d7bd7384a37c 1356 }
grzemich 0:d7bd7384a37c 1357 }
grzemich 0:d7bd7384a37c 1358 TCPIP_APIMSG_ACK(msg);
grzemich 0:d7bd7384a37c 1359 }
grzemich 0:d7bd7384a37c 1360
grzemich 0:d7bd7384a37c 1361 /**
grzemich 0:d7bd7384a37c 1362 * Return a connection's local or remote address
grzemich 0:d7bd7384a37c 1363 * Called from netconn_getaddr
grzemich 0:d7bd7384a37c 1364 *
grzemich 0:d7bd7384a37c 1365 * @param msg the api_msg_msg pointing to the connection
grzemich 0:d7bd7384a37c 1366 */
grzemich 0:d7bd7384a37c 1367 void
grzemich 0:d7bd7384a37c 1368 do_getaddr(struct api_msg_msg *msg)
grzemich 0:d7bd7384a37c 1369 {
grzemich 0:d7bd7384a37c 1370 if (msg->conn->pcb.ip != NULL) {
grzemich 0:d7bd7384a37c 1371 *(msg->msg.ad.ipaddr) = (msg->msg.ad.local ? msg->conn->pcb.ip->local_ip :
grzemich 0:d7bd7384a37c 1372 msg->conn->pcb.ip->remote_ip);
grzemich 0:d7bd7384a37c 1373
grzemich 0:d7bd7384a37c 1374 msg->err = ERR_OK;
grzemich 0:d7bd7384a37c 1375 switch (NETCONNTYPE_GROUP(msg->conn->type)) {
grzemich 0:d7bd7384a37c 1376 #if LWIP_RAW
grzemich 0:d7bd7384a37c 1377 case NETCONN_RAW:
grzemich 0:d7bd7384a37c 1378 if (msg->msg.ad.local) {
grzemich 0:d7bd7384a37c 1379 *(msg->msg.ad.port) = msg->conn->pcb.raw->protocol;
grzemich 0:d7bd7384a37c 1380 } else {
grzemich 0:d7bd7384a37c 1381 /* return an error as connecting is only a helper for upper layers */
grzemich 0:d7bd7384a37c 1382 msg->err = ERR_CONN;
grzemich 0:d7bd7384a37c 1383 }
grzemich 0:d7bd7384a37c 1384 break;
grzemich 0:d7bd7384a37c 1385 #endif /* LWIP_RAW */
grzemich 0:d7bd7384a37c 1386 #if LWIP_UDP
grzemich 0:d7bd7384a37c 1387 case NETCONN_UDP:
grzemich 0:d7bd7384a37c 1388 if (msg->msg.ad.local) {
grzemich 0:d7bd7384a37c 1389 *(msg->msg.ad.port) = msg->conn->pcb.udp->local_port;
grzemich 0:d7bd7384a37c 1390 } else {
grzemich 0:d7bd7384a37c 1391 if ((msg->conn->pcb.udp->flags & UDP_FLAGS_CONNECTED) == 0) {
grzemich 0:d7bd7384a37c 1392 msg->err = ERR_CONN;
grzemich 0:d7bd7384a37c 1393 } else {
grzemich 0:d7bd7384a37c 1394 *(msg->msg.ad.port) = msg->conn->pcb.udp->remote_port;
grzemich 0:d7bd7384a37c 1395 }
grzemich 0:d7bd7384a37c 1396 }
grzemich 0:d7bd7384a37c 1397 break;
grzemich 0:d7bd7384a37c 1398 #endif /* LWIP_UDP */
grzemich 0:d7bd7384a37c 1399 #if LWIP_TCP
grzemich 0:d7bd7384a37c 1400 case NETCONN_TCP:
grzemich 0:d7bd7384a37c 1401 *(msg->msg.ad.port) = (msg->msg.ad.local?msg->conn->pcb.tcp->local_port:msg->conn->pcb.tcp->remote_port);
grzemich 0:d7bd7384a37c 1402 break;
grzemich 0:d7bd7384a37c 1403 #endif /* LWIP_TCP */
grzemich 0:d7bd7384a37c 1404 default:
grzemich 0:d7bd7384a37c 1405 LWIP_ASSERT("invalid netconn_type", 0);
grzemich 0:d7bd7384a37c 1406 break;
grzemich 0:d7bd7384a37c 1407 }
grzemich 0:d7bd7384a37c 1408 } else {
grzemich 0:d7bd7384a37c 1409 msg->err = ERR_CONN;
grzemich 0:d7bd7384a37c 1410 }
grzemich 0:d7bd7384a37c 1411 TCPIP_APIMSG_ACK(msg);
grzemich 0:d7bd7384a37c 1412 }
grzemich 0:d7bd7384a37c 1413
grzemich 0:d7bd7384a37c 1414 /**
grzemich 0:d7bd7384a37c 1415 * Close a TCP pcb contained in a netconn
grzemich 0:d7bd7384a37c 1416 * Called from netconn_close
grzemich 0:d7bd7384a37c 1417 *
grzemich 0:d7bd7384a37c 1418 * @param msg the api_msg_msg pointing to the connection
grzemich 0:d7bd7384a37c 1419 */
grzemich 0:d7bd7384a37c 1420 void
grzemich 0:d7bd7384a37c 1421 do_close(struct api_msg_msg *msg)
grzemich 0:d7bd7384a37c 1422 {
grzemich 0:d7bd7384a37c 1423 #if LWIP_TCP
grzemich 0:d7bd7384a37c 1424 /* @todo: abort running write/connect? */
grzemich 0:d7bd7384a37c 1425 if ((msg->conn->state != NETCONN_NONE) && (msg->conn->state != NETCONN_LISTEN)) {
grzemich 0:d7bd7384a37c 1426 /* this only happens for TCP netconns */
grzemich 0:d7bd7384a37c 1427 LWIP_ASSERT("msg->conn->type == NETCONN_TCP", msg->conn->type == NETCONN_TCP);
grzemich 0:d7bd7384a37c 1428 msg->err = ERR_INPROGRESS;
grzemich 0:d7bd7384a37c 1429 } else if ((msg->conn->pcb.tcp != NULL) && (msg->conn->type == NETCONN_TCP)) {
grzemich 0:d7bd7384a37c 1430 if ((msg->msg.sd.shut != NETCONN_SHUT_RDWR) && (msg->conn->state == NETCONN_LISTEN)) {
grzemich 0:d7bd7384a37c 1431 /* LISTEN doesn't support half shutdown */
grzemich 0:d7bd7384a37c 1432 msg->err = ERR_CONN;
grzemich 0:d7bd7384a37c 1433 } else {
grzemich 0:d7bd7384a37c 1434 if (msg->msg.sd.shut & NETCONN_SHUT_RD) {
grzemich 0:d7bd7384a37c 1435 /* Drain and delete mboxes */
grzemich 0:d7bd7384a37c 1436 netconn_drain(msg->conn);
grzemich 0:d7bd7384a37c 1437 }
grzemich 0:d7bd7384a37c 1438 LWIP_ASSERT("already writing or closing", msg->conn->current_msg == NULL &&
grzemich 0:d7bd7384a37c 1439 msg->conn->write_offset == 0);
grzemich 0:d7bd7384a37c 1440 msg->conn->state = NETCONN_CLOSE;
grzemich 0:d7bd7384a37c 1441 msg->conn->current_msg = msg;
grzemich 0:d7bd7384a37c 1442 do_close_internal(msg->conn);
grzemich 0:d7bd7384a37c 1443 /* for tcp netconns, do_close_internal ACKs the message */
grzemich 0:d7bd7384a37c 1444 return;
grzemich 0:d7bd7384a37c 1445 }
grzemich 0:d7bd7384a37c 1446 } else
grzemich 0:d7bd7384a37c 1447 #endif /* LWIP_TCP */
grzemich 0:d7bd7384a37c 1448 {
grzemich 0:d7bd7384a37c 1449 msg->err = ERR_VAL;
grzemich 0:d7bd7384a37c 1450 }
grzemich 0:d7bd7384a37c 1451 sys_sem_signal(&msg->conn->op_completed);
grzemich 0:d7bd7384a37c 1452 }
grzemich 0:d7bd7384a37c 1453
grzemich 0:d7bd7384a37c 1454 #if LWIP_IGMP
grzemich 0:d7bd7384a37c 1455 /**
grzemich 0:d7bd7384a37c 1456 * Join multicast groups for UDP netconns.
grzemich 0:d7bd7384a37c 1457 * Called from netconn_join_leave_group
grzemich 0:d7bd7384a37c 1458 *
grzemich 0:d7bd7384a37c 1459 * @param msg the api_msg_msg pointing to the connection
grzemich 0:d7bd7384a37c 1460 */
grzemich 0:d7bd7384a37c 1461 void
grzemich 0:d7bd7384a37c 1462 do_join_leave_group(struct api_msg_msg *msg)
grzemich 0:d7bd7384a37c 1463 {
grzemich 0:d7bd7384a37c 1464 if (ERR_IS_FATAL(msg->conn->last_err)) {
grzemich 0:d7bd7384a37c 1465 msg->err = msg->conn->last_err;
grzemich 0:d7bd7384a37c 1466 } else {
grzemich 0:d7bd7384a37c 1467 if (msg->conn->pcb.tcp != NULL) {
grzemich 0:d7bd7384a37c 1468 if (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_UDP) {
grzemich 0:d7bd7384a37c 1469 #if LWIP_UDP
grzemich 0:d7bd7384a37c 1470 if (msg->msg.jl.join_or_leave == NETCONN_JOIN) {
grzemich 0:d7bd7384a37c 1471 msg->err = igmp_joingroup(msg->msg.jl.netif_addr, msg->msg.jl.multiaddr);
grzemich 0:d7bd7384a37c 1472 } else {
grzemich 0:d7bd7384a37c 1473 msg->err = igmp_leavegroup(msg->msg.jl.netif_addr, msg->msg.jl.multiaddr);
grzemich 0:d7bd7384a37c 1474 }
grzemich 0:d7bd7384a37c 1475 #endif /* LWIP_UDP */
grzemich 0:d7bd7384a37c 1476 #if (LWIP_TCP || LWIP_RAW)
grzemich 0:d7bd7384a37c 1477 } else {
grzemich 0:d7bd7384a37c 1478 msg->err = ERR_VAL;
grzemich 0:d7bd7384a37c 1479 #endif /* (LWIP_TCP || LWIP_RAW) */
grzemich 0:d7bd7384a37c 1480 }
grzemich 0:d7bd7384a37c 1481 } else {
grzemich 0:d7bd7384a37c 1482 msg->err = ERR_CONN;
grzemich 0:d7bd7384a37c 1483 }
grzemich 0:d7bd7384a37c 1484 }
grzemich 0:d7bd7384a37c 1485 TCPIP_APIMSG_ACK(msg);
grzemich 0:d7bd7384a37c 1486 }
grzemich 0:d7bd7384a37c 1487 #endif /* LWIP_IGMP */
grzemich 0:d7bd7384a37c 1488
grzemich 0:d7bd7384a37c 1489 #if LWIP_DNS
grzemich 0:d7bd7384a37c 1490 /**
grzemich 0:d7bd7384a37c 1491 * Callback function that is called when DNS name is resolved
grzemich 0:d7bd7384a37c 1492 * (or on timeout). A waiting application thread is waked up by
grzemich 0:d7bd7384a37c 1493 * signaling the semaphore.
grzemich 0:d7bd7384a37c 1494 */
grzemich 0:d7bd7384a37c 1495 static void
grzemich 0:d7bd7384a37c 1496 do_dns_found(const char *name, ip_addr_t *ipaddr, void *arg)
grzemich 0:d7bd7384a37c 1497 {
grzemich 0:d7bd7384a37c 1498 struct dns_api_msg *msg = (struct dns_api_msg*)arg;
grzemich 0:d7bd7384a37c 1499
grzemich 0:d7bd7384a37c 1500 LWIP_ASSERT("DNS response for wrong host name", strcmp(msg->name, name) == 0);
grzemich 0:d7bd7384a37c 1501 LWIP_UNUSED_ARG(name);
grzemich 0:d7bd7384a37c 1502
grzemich 0:d7bd7384a37c 1503 if (ipaddr == NULL) {
grzemich 0:d7bd7384a37c 1504 /* timeout or memory error */
grzemich 0:d7bd7384a37c 1505 *msg->err = ERR_VAL;
grzemich 0:d7bd7384a37c 1506 } else {
grzemich 0:d7bd7384a37c 1507 /* address was resolved */
grzemich 0:d7bd7384a37c 1508 *msg->err = ERR_OK;
grzemich 0:d7bd7384a37c 1509 *msg->addr = *ipaddr;
grzemich 0:d7bd7384a37c 1510 }
grzemich 0:d7bd7384a37c 1511 /* wake up the application task waiting in netconn_gethostbyname */
grzemich 0:d7bd7384a37c 1512 sys_sem_signal(msg->sem);
grzemich 0:d7bd7384a37c 1513 }
grzemich 0:d7bd7384a37c 1514
grzemich 0:d7bd7384a37c 1515 /**
grzemich 0:d7bd7384a37c 1516 * Execute a DNS query
grzemich 0:d7bd7384a37c 1517 * Called from netconn_gethostbyname
grzemich 0:d7bd7384a37c 1518 *
grzemich 0:d7bd7384a37c 1519 * @param arg the dns_api_msg pointing to the query
grzemich 0:d7bd7384a37c 1520 */
grzemich 0:d7bd7384a37c 1521 void
grzemich 0:d7bd7384a37c 1522 do_gethostbyname(void *arg)
grzemich 0:d7bd7384a37c 1523 {
grzemich 0:d7bd7384a37c 1524 struct dns_api_msg *msg = (struct dns_api_msg*)arg;
grzemich 0:d7bd7384a37c 1525
grzemich 0:d7bd7384a37c 1526 *msg->err = dns_gethostbyname(msg->name, msg->addr, do_dns_found, msg);
grzemich 0:d7bd7384a37c 1527 if (*msg->err != ERR_INPROGRESS) {
grzemich 0:d7bd7384a37c 1528 /* on error or immediate success, wake up the application
grzemich 0:d7bd7384a37c 1529 * task waiting in netconn_gethostbyname */
grzemich 0:d7bd7384a37c 1530 sys_sem_signal(msg->sem);
grzemich 0:d7bd7384a37c 1531 }
grzemich 0:d7bd7384a37c 1532 }
grzemich 0:d7bd7384a37c 1533 #endif /* LWIP_DNS */
grzemich 0:d7bd7384a37c 1534
grzemich 0:d7bd7384a37c 1535 #endif /* LWIP_NETCONN */