Wayne Jay / EthernetInterface

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lwip/api/api_msg.c@0:b2805b6888dc, 2016-06-20 (annotated)

Committer:
robert_jw
Date:
Mon Jun 20 01:40:20 2016 +0000
Revision:
0:b2805b6888dc
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Who changed what in which revision?

UserRevisionLine numberNew contents of line
robert_jw 0:b2805b6888dc 1 /**
robert_jw 0:b2805b6888dc 2 * @file
robert_jw 0:b2805b6888dc 3 * Sequential API Internal module
robert_jw 0:b2805b6888dc 4 *
robert_jw 0:b2805b6888dc 5 */
robert_jw 0:b2805b6888dc 6
robert_jw 0:b2805b6888dc 7 /*
robert_jw 0:b2805b6888dc 8 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
robert_jw 0:b2805b6888dc 9 * All rights reserved.
robert_jw 0:b2805b6888dc 10 *
robert_jw 0:b2805b6888dc 11 * Redistribution and use in source and binary forms, with or without modification,
robert_jw 0:b2805b6888dc 12 * are permitted provided that the following conditions are met:
robert_jw 0:b2805b6888dc 13 *
robert_jw 0:b2805b6888dc 14 * 1. Redistributions of source code must retain the above copyright notice,
robert_jw 0:b2805b6888dc 15 * this list of conditions and the following disclaimer.
robert_jw 0:b2805b6888dc 16 * 2. Redistributions in binary form must reproduce the above copyright notice,
robert_jw 0:b2805b6888dc 17 * this list of conditions and the following disclaimer in the documentation
robert_jw 0:b2805b6888dc 18 * and/or other materials provided with the distribution.
robert_jw 0:b2805b6888dc 19 * 3. The name of the author may not be used to endorse or promote products
robert_jw 0:b2805b6888dc 20 * derived from this software without specific prior written permission.
robert_jw 0:b2805b6888dc 21 *
robert_jw 0:b2805b6888dc 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
robert_jw 0:b2805b6888dc 23 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
robert_jw 0:b2805b6888dc 24 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
robert_jw 0:b2805b6888dc 25 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
robert_jw 0:b2805b6888dc 26 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
robert_jw 0:b2805b6888dc 27 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
robert_jw 0:b2805b6888dc 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
robert_jw 0:b2805b6888dc 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
robert_jw 0:b2805b6888dc 30 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
robert_jw 0:b2805b6888dc 31 * OF SUCH DAMAGE.
robert_jw 0:b2805b6888dc 32 *
robert_jw 0:b2805b6888dc 33 * This file is part of the lwIP TCP/IP stack.
robert_jw 0:b2805b6888dc 34 *
robert_jw 0:b2805b6888dc 35 * Author: Adam Dunkels <adam@sics.se>
robert_jw 0:b2805b6888dc 36 *
robert_jw 0:b2805b6888dc 37 */
robert_jw 0:b2805b6888dc 38
robert_jw 0:b2805b6888dc 39 #include "lwip/opt.h"
robert_jw 0:b2805b6888dc 40
robert_jw 0:b2805b6888dc 41 #if LWIP_NETCONN /* don't build if not configured for use in lwipopts.h */
robert_jw 0:b2805b6888dc 42
robert_jw 0:b2805b6888dc 43 #include "lwip/api_msg.h"
robert_jw 0:b2805b6888dc 44
robert_jw 0:b2805b6888dc 45 #include "lwip/ip.h"
robert_jw 0:b2805b6888dc 46 #include "lwip/udp.h"
robert_jw 0:b2805b6888dc 47 #include "lwip/tcp.h"
robert_jw 0:b2805b6888dc 48 #include "lwip/raw.h"
robert_jw 0:b2805b6888dc 49
robert_jw 0:b2805b6888dc 50 #include "lwip/memp.h"
robert_jw 0:b2805b6888dc 51 #include "lwip/tcpip.h"
robert_jw 0:b2805b6888dc 52 #include "lwip/igmp.h"
robert_jw 0:b2805b6888dc 53 #include "lwip/dns.h"
robert_jw 0:b2805b6888dc 54
robert_jw 0:b2805b6888dc 55 #include <string.h>
robert_jw 0:b2805b6888dc 56
robert_jw 0:b2805b6888dc 57 #define SET_NONBLOCKING_CONNECT(conn, val) do { if(val) { \
robert_jw 0:b2805b6888dc 58 (conn)->flags |= NETCONN_FLAG_IN_NONBLOCKING_CONNECT; \
robert_jw 0:b2805b6888dc 59 } else { \
robert_jw 0:b2805b6888dc 60 (conn)->flags &= ~ NETCONN_FLAG_IN_NONBLOCKING_CONNECT; }} while(0)
robert_jw 0:b2805b6888dc 61 #define IN_NONBLOCKING_CONNECT(conn) (((conn)->flags & NETCONN_FLAG_IN_NONBLOCKING_CONNECT) != 0)
robert_jw 0:b2805b6888dc 62
robert_jw 0:b2805b6888dc 63 /* forward declarations */
robert_jw 0:b2805b6888dc 64 #if LWIP_TCP
robert_jw 0:b2805b6888dc 65 static err_t do_writemore(struct netconn *conn);
robert_jw 0:b2805b6888dc 66 static void do_close_internal(struct netconn *conn);
robert_jw 0:b2805b6888dc 67 #endif
robert_jw 0:b2805b6888dc 68
robert_jw 0:b2805b6888dc 69 #if LWIP_RAW
robert_jw 0:b2805b6888dc 70 /**
robert_jw 0:b2805b6888dc 71 * Receive callback function for RAW netconns.
robert_jw 0:b2805b6888dc 72 * Doesn't 'eat' the packet, only references it and sends it to
robert_jw 0:b2805b6888dc 73 * conn->recvmbox
robert_jw 0:b2805b6888dc 74 *
robert_jw 0:b2805b6888dc 75 * @see raw.h (struct raw_pcb.recv) for parameters and return value
robert_jw 0:b2805b6888dc 76 */
robert_jw 0:b2805b6888dc 77 static u8_t
robert_jw 0:b2805b6888dc 78 recv_raw(void *arg, struct raw_pcb *pcb, struct pbuf *p,
robert_jw 0:b2805b6888dc 79 ip_addr_t *addr)
robert_jw 0:b2805b6888dc 80 {
robert_jw 0:b2805b6888dc 81 struct pbuf *q;
robert_jw 0:b2805b6888dc 82 struct netbuf *buf;
robert_jw 0:b2805b6888dc 83 struct netconn *conn;
robert_jw 0:b2805b6888dc 84
robert_jw 0:b2805b6888dc 85 LWIP_UNUSED_ARG(addr);
robert_jw 0:b2805b6888dc 86 conn = (struct netconn *)arg;
robert_jw 0:b2805b6888dc 87
robert_jw 0:b2805b6888dc 88 if ((conn != NULL) && sys_mbox_valid(&conn->recvmbox)) {
robert_jw 0:b2805b6888dc 89 #if LWIP_SO_RCVBUF
robert_jw 0:b2805b6888dc 90 int recv_avail;
robert_jw 0:b2805b6888dc 91 SYS_ARCH_GET(conn->recv_avail, recv_avail);
robert_jw 0:b2805b6888dc 92 if ((recv_avail + (int)(p->tot_len)) > conn->recv_bufsize) {
robert_jw 0:b2805b6888dc 93 return 0;
robert_jw 0:b2805b6888dc 94 }
robert_jw 0:b2805b6888dc 95 #endif /* LWIP_SO_RCVBUF */
robert_jw 0:b2805b6888dc 96 /* copy the whole packet into new pbufs */
robert_jw 0:b2805b6888dc 97 q = pbuf_alloc(PBUF_RAW, p->tot_len, PBUF_RAM);
robert_jw 0:b2805b6888dc 98 if(q != NULL) {
robert_jw 0:b2805b6888dc 99 if (pbuf_copy(q, p) != ERR_OK) {
robert_jw 0:b2805b6888dc 100 pbuf_free(q);
robert_jw 0:b2805b6888dc 101 q = NULL;
robert_jw 0:b2805b6888dc 102 }
robert_jw 0:b2805b6888dc 103 }
robert_jw 0:b2805b6888dc 104
robert_jw 0:b2805b6888dc 105 if (q != NULL) {
robert_jw 0:b2805b6888dc 106 u16_t len;
robert_jw 0:b2805b6888dc 107 buf = (struct netbuf *)memp_malloc(MEMP_NETBUF);
robert_jw 0:b2805b6888dc 108 if (buf == NULL) {
robert_jw 0:b2805b6888dc 109 pbuf_free(q);
robert_jw 0:b2805b6888dc 110 return 0;
robert_jw 0:b2805b6888dc 111 }
robert_jw 0:b2805b6888dc 112
robert_jw 0:b2805b6888dc 113 buf->p = q;
robert_jw 0:b2805b6888dc 114 buf->ptr = q;
robert_jw 0:b2805b6888dc 115 ip_addr_copy(buf->addr, *ip_current_src_addr());
robert_jw 0:b2805b6888dc 116 buf->port = pcb->protocol;
robert_jw 0:b2805b6888dc 117
robert_jw 0:b2805b6888dc 118 len = q->tot_len;
robert_jw 0:b2805b6888dc 119 if (sys_mbox_trypost(&conn->recvmbox, buf) != ERR_OK) {
robert_jw 0:b2805b6888dc 120 netbuf_delete(buf);
robert_jw 0:b2805b6888dc 121 return 0;
robert_jw 0:b2805b6888dc 122 } else {
robert_jw 0:b2805b6888dc 123 #if LWIP_SO_RCVBUF
robert_jw 0:b2805b6888dc 124 SYS_ARCH_INC(conn->recv_avail, len);
robert_jw 0:b2805b6888dc 125 #endif /* LWIP_SO_RCVBUF */
robert_jw 0:b2805b6888dc 126 /* Register event with callback */
robert_jw 0:b2805b6888dc 127 API_EVENT(conn, NETCONN_EVT_RCVPLUS, len);
robert_jw 0:b2805b6888dc 128 }
robert_jw 0:b2805b6888dc 129 }
robert_jw 0:b2805b6888dc 130 }
robert_jw 0:b2805b6888dc 131
robert_jw 0:b2805b6888dc 132 return 0; /* do not eat the packet */
robert_jw 0:b2805b6888dc 133 }
robert_jw 0:b2805b6888dc 134 #endif /* LWIP_RAW*/
robert_jw 0:b2805b6888dc 135
robert_jw 0:b2805b6888dc 136 #if LWIP_UDP
robert_jw 0:b2805b6888dc 137 /**
robert_jw 0:b2805b6888dc 138 * Receive callback function for UDP netconns.
robert_jw 0:b2805b6888dc 139 * Posts the packet to conn->recvmbox or deletes it on memory error.
robert_jw 0:b2805b6888dc 140 *
robert_jw 0:b2805b6888dc 141 * @see udp.h (struct udp_pcb.recv) for parameters
robert_jw 0:b2805b6888dc 142 */
robert_jw 0:b2805b6888dc 143 static void
robert_jw 0:b2805b6888dc 144 recv_udp(void *arg, struct udp_pcb *pcb, struct pbuf *p,
robert_jw 0:b2805b6888dc 145 ip_addr_t *addr, u16_t port)
robert_jw 0:b2805b6888dc 146 {
robert_jw 0:b2805b6888dc 147 struct netbuf *buf;
robert_jw 0:b2805b6888dc 148 struct netconn *conn;
robert_jw 0:b2805b6888dc 149 u16_t len;
robert_jw 0:b2805b6888dc 150 #if LWIP_SO_RCVBUF
robert_jw 0:b2805b6888dc 151 int recv_avail;
robert_jw 0:b2805b6888dc 152 #endif /* LWIP_SO_RCVBUF */
robert_jw 0:b2805b6888dc 153
robert_jw 0:b2805b6888dc 154 LWIP_UNUSED_ARG(pcb); /* only used for asserts... */
robert_jw 0:b2805b6888dc 155 LWIP_ASSERT("recv_udp must have a pcb argument", pcb != NULL);
robert_jw 0:b2805b6888dc 156 LWIP_ASSERT("recv_udp must have an argument", arg != NULL);
robert_jw 0:b2805b6888dc 157 conn = (struct netconn *)arg;
robert_jw 0:b2805b6888dc 158 LWIP_ASSERT("recv_udp: recv for wrong pcb!", conn->pcb.udp == pcb);
robert_jw 0:b2805b6888dc 159
robert_jw 0:b2805b6888dc 160 #if LWIP_SO_RCVBUF
robert_jw 0:b2805b6888dc 161 SYS_ARCH_GET(conn->recv_avail, recv_avail);
robert_jw 0:b2805b6888dc 162 if ((conn == NULL) || !sys_mbox_valid(&conn->recvmbox) ||
robert_jw 0:b2805b6888dc 163 ((recv_avail + (int)(p->tot_len)) > conn->recv_bufsize)) {
robert_jw 0:b2805b6888dc 164 #else /* LWIP_SO_RCVBUF */
robert_jw 0:b2805b6888dc 165 if ((conn == NULL) || !sys_mbox_valid(&conn->recvmbox)) {
robert_jw 0:b2805b6888dc 166 #endif /* LWIP_SO_RCVBUF */
robert_jw 0:b2805b6888dc 167 pbuf_free(p);
robert_jw 0:b2805b6888dc 168 return;
robert_jw 0:b2805b6888dc 169 }
robert_jw 0:b2805b6888dc 170
robert_jw 0:b2805b6888dc 171 buf = (struct netbuf *)memp_malloc(MEMP_NETBUF);
robert_jw 0:b2805b6888dc 172 if (buf == NULL) {
robert_jw 0:b2805b6888dc 173 pbuf_free(p);
robert_jw 0:b2805b6888dc 174 return;
robert_jw 0:b2805b6888dc 175 } else {
robert_jw 0:b2805b6888dc 176 buf->p = p;
robert_jw 0:b2805b6888dc 177 buf->ptr = p;
robert_jw 0:b2805b6888dc 178 ip_addr_set(&buf->addr, addr);
robert_jw 0:b2805b6888dc 179 buf->port = port;
robert_jw 0:b2805b6888dc 180 #if LWIP_NETBUF_RECVINFO
robert_jw 0:b2805b6888dc 181 {
robert_jw 0:b2805b6888dc 182 const struct ip_hdr* iphdr = ip_current_header();
robert_jw 0:b2805b6888dc 183 /* get the UDP header - always in the first pbuf, ensured by udp_input */
robert_jw 0:b2805b6888dc 184 const struct udp_hdr* udphdr = (void*)(((char*)iphdr) + IPH_LEN(iphdr));
robert_jw 0:b2805b6888dc 185 #if LWIP_CHECKSUM_ON_COPY
robert_jw 0:b2805b6888dc 186 buf->flags = NETBUF_FLAG_DESTADDR;
robert_jw 0:b2805b6888dc 187 #endif /* LWIP_CHECKSUM_ON_COPY */
robert_jw 0:b2805b6888dc 188 ip_addr_set(&buf->toaddr, ip_current_dest_addr());
robert_jw 0:b2805b6888dc 189 buf->toport_chksum = udphdr->dest;
robert_jw 0:b2805b6888dc 190 }
robert_jw 0:b2805b6888dc 191 #endif /* LWIP_NETBUF_RECVINFO */
robert_jw 0:b2805b6888dc 192 }
robert_jw 0:b2805b6888dc 193
robert_jw 0:b2805b6888dc 194 len = p->tot_len;
robert_jw 0:b2805b6888dc 195 if (sys_mbox_trypost(&conn->recvmbox, buf) != ERR_OK) {
robert_jw 0:b2805b6888dc 196 netbuf_delete(buf);
robert_jw 0:b2805b6888dc 197 return;
robert_jw 0:b2805b6888dc 198 } else {
robert_jw 0:b2805b6888dc 199 #if LWIP_SO_RCVBUF
robert_jw 0:b2805b6888dc 200 SYS_ARCH_INC(conn->recv_avail, len);
robert_jw 0:b2805b6888dc 201 #endif /* LWIP_SO_RCVBUF */
robert_jw 0:b2805b6888dc 202 /* Register event with callback */
robert_jw 0:b2805b6888dc 203 API_EVENT(conn, NETCONN_EVT_RCVPLUS, len);
robert_jw 0:b2805b6888dc 204 }
robert_jw 0:b2805b6888dc 205 }
robert_jw 0:b2805b6888dc 206 #endif /* LWIP_UDP */
robert_jw 0:b2805b6888dc 207
robert_jw 0:b2805b6888dc 208 #if LWIP_TCP
robert_jw 0:b2805b6888dc 209 /**
robert_jw 0:b2805b6888dc 210 * Receive callback function for TCP netconns.
robert_jw 0:b2805b6888dc 211 * Posts the packet to conn->recvmbox, but doesn't delete it on errors.
robert_jw 0:b2805b6888dc 212 *
robert_jw 0:b2805b6888dc 213 * @see tcp.h (struct tcp_pcb.recv) for parameters and return value
robert_jw 0:b2805b6888dc 214 */
robert_jw 0:b2805b6888dc 215 static err_t
robert_jw 0:b2805b6888dc 216 recv_tcp(void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err)
robert_jw 0:b2805b6888dc 217 {
robert_jw 0:b2805b6888dc 218 struct netconn *conn;
robert_jw 0:b2805b6888dc 219 u16_t len;
robert_jw 0:b2805b6888dc 220
robert_jw 0:b2805b6888dc 221 LWIP_UNUSED_ARG(pcb);
robert_jw 0:b2805b6888dc 222 LWIP_ASSERT("recv_tcp must have a pcb argument", pcb != NULL);
robert_jw 0:b2805b6888dc 223 LWIP_ASSERT("recv_tcp must have an argument", arg != NULL);
robert_jw 0:b2805b6888dc 224 conn = (struct netconn *)arg;
robert_jw 0:b2805b6888dc 225 LWIP_ASSERT("recv_tcp: recv for wrong pcb!", conn->pcb.tcp == pcb);
robert_jw 0:b2805b6888dc 226
robert_jw 0:b2805b6888dc 227 if (conn == NULL) {
robert_jw 0:b2805b6888dc 228 return ERR_VAL;
robert_jw 0:b2805b6888dc 229 }
robert_jw 0:b2805b6888dc 230 if (!sys_mbox_valid(&conn->recvmbox)) {
robert_jw 0:b2805b6888dc 231 /* recvmbox already deleted */
robert_jw 0:b2805b6888dc 232 if (p != NULL) {
robert_jw 0:b2805b6888dc 233 tcp_recved(pcb, p->tot_len);
robert_jw 0:b2805b6888dc 234 pbuf_free(p);
robert_jw 0:b2805b6888dc 235 }
robert_jw 0:b2805b6888dc 236 return ERR_OK;
robert_jw 0:b2805b6888dc 237 }
robert_jw 0:b2805b6888dc 238 /* Unlike for UDP or RAW pcbs, don't check for available space
robert_jw 0:b2805b6888dc 239 using recv_avail since that could break the connection
robert_jw 0:b2805b6888dc 240 (data is already ACKed) */
robert_jw 0:b2805b6888dc 241
robert_jw 0:b2805b6888dc 242 /* don't overwrite fatal errors! */
robert_jw 0:b2805b6888dc 243 NETCONN_SET_SAFE_ERR(conn, err);
robert_jw 0:b2805b6888dc 244
robert_jw 0:b2805b6888dc 245 if (p != NULL) {
robert_jw 0:b2805b6888dc 246 len = p->tot_len;
robert_jw 0:b2805b6888dc 247 } else {
robert_jw 0:b2805b6888dc 248 len = 0;
robert_jw 0:b2805b6888dc 249 }
robert_jw 0:b2805b6888dc 250
robert_jw 0:b2805b6888dc 251 if (sys_mbox_trypost(&conn->recvmbox, p) != ERR_OK) {
robert_jw 0:b2805b6888dc 252 /* don't deallocate p: it is presented to us later again from tcp_fasttmr! */
robert_jw 0:b2805b6888dc 253 return ERR_MEM;
robert_jw 0:b2805b6888dc 254 } else {
robert_jw 0:b2805b6888dc 255 #if LWIP_SO_RCVBUF
robert_jw 0:b2805b6888dc 256 SYS_ARCH_INC(conn->recv_avail, len);
robert_jw 0:b2805b6888dc 257 #endif /* LWIP_SO_RCVBUF */
robert_jw 0:b2805b6888dc 258 /* Register event with callback */
robert_jw 0:b2805b6888dc 259 API_EVENT(conn, NETCONN_EVT_RCVPLUS, len);
robert_jw 0:b2805b6888dc 260 }
robert_jw 0:b2805b6888dc 261
robert_jw 0:b2805b6888dc 262 return ERR_OK;
robert_jw 0:b2805b6888dc 263 }
robert_jw 0:b2805b6888dc 264
robert_jw 0:b2805b6888dc 265 /**
robert_jw 0:b2805b6888dc 266 * Poll callback function for TCP netconns.
robert_jw 0:b2805b6888dc 267 * Wakes up an application thread that waits for a connection to close
robert_jw 0:b2805b6888dc 268 * or data to be sent. The application thread then takes the
robert_jw 0:b2805b6888dc 269 * appropriate action to go on.
robert_jw 0:b2805b6888dc 270 *
robert_jw 0:b2805b6888dc 271 * Signals the conn->sem.
robert_jw 0:b2805b6888dc 272 * netconn_close waits for conn->sem if closing failed.
robert_jw 0:b2805b6888dc 273 *
robert_jw 0:b2805b6888dc 274 * @see tcp.h (struct tcp_pcb.poll) for parameters and return value
robert_jw 0:b2805b6888dc 275 */
robert_jw 0:b2805b6888dc 276 static err_t
robert_jw 0:b2805b6888dc 277 poll_tcp(void *arg, struct tcp_pcb *pcb)
robert_jw 0:b2805b6888dc 278 {
robert_jw 0:b2805b6888dc 279 struct netconn *conn = (struct netconn *)arg;
robert_jw 0:b2805b6888dc 280
robert_jw 0:b2805b6888dc 281 LWIP_UNUSED_ARG(pcb);
robert_jw 0:b2805b6888dc 282 LWIP_ASSERT("conn != NULL", (conn != NULL));
robert_jw 0:b2805b6888dc 283
robert_jw 0:b2805b6888dc 284 if (conn->state == NETCONN_WRITE) {
robert_jw 0:b2805b6888dc 285 do_writemore(conn);
robert_jw 0:b2805b6888dc 286 } else if (conn->state == NETCONN_CLOSE) {
robert_jw 0:b2805b6888dc 287 do_close_internal(conn);
robert_jw 0:b2805b6888dc 288 }
robert_jw 0:b2805b6888dc 289 /* @todo: implement connect timeout here? */
robert_jw 0:b2805b6888dc 290
robert_jw 0:b2805b6888dc 291 /* Did a nonblocking write fail before? Then check available write-space. */
robert_jw 0:b2805b6888dc 292 if (conn->flags & NETCONN_FLAG_CHECK_WRITESPACE) {
robert_jw 0:b2805b6888dc 293 /* If the queued byte- or pbuf-count drops below the configured low-water limit,
robert_jw 0:b2805b6888dc 294 let select mark this pcb as writable again. */
robert_jw 0:b2805b6888dc 295 if ((conn->pcb.tcp != NULL) && (tcp_sndbuf(conn->pcb.tcp) > TCP_SNDLOWAT) &&
robert_jw 0:b2805b6888dc 296 (tcp_sndqueuelen(conn->pcb.tcp) < TCP_SNDQUEUELOWAT)) {
robert_jw 0:b2805b6888dc 297 conn->flags &= ~NETCONN_FLAG_CHECK_WRITESPACE;
robert_jw 0:b2805b6888dc 298 API_EVENT(conn, NETCONN_EVT_SENDPLUS, 0);
robert_jw 0:b2805b6888dc 299 }
robert_jw 0:b2805b6888dc 300 }
robert_jw 0:b2805b6888dc 301
robert_jw 0:b2805b6888dc 302 return ERR_OK;
robert_jw 0:b2805b6888dc 303 }
robert_jw 0:b2805b6888dc 304
robert_jw 0:b2805b6888dc 305 /**
robert_jw 0:b2805b6888dc 306 * Sent callback function for TCP netconns.
robert_jw 0:b2805b6888dc 307 * Signals the conn->sem and calls API_EVENT.
robert_jw 0:b2805b6888dc 308 * netconn_write waits for conn->sem if send buffer is low.
robert_jw 0:b2805b6888dc 309 *
robert_jw 0:b2805b6888dc 310 * @see tcp.h (struct tcp_pcb.sent) for parameters and return value
robert_jw 0:b2805b6888dc 311 */
robert_jw 0:b2805b6888dc 312 static err_t
robert_jw 0:b2805b6888dc 313 sent_tcp(void *arg, struct tcp_pcb *pcb, u16_t len)
robert_jw 0:b2805b6888dc 314 {
robert_jw 0:b2805b6888dc 315 struct netconn *conn = (struct netconn *)arg;
robert_jw 0:b2805b6888dc 316
robert_jw 0:b2805b6888dc 317 LWIP_UNUSED_ARG(pcb);
robert_jw 0:b2805b6888dc 318 LWIP_ASSERT("conn != NULL", (conn != NULL));
robert_jw 0:b2805b6888dc 319
robert_jw 0:b2805b6888dc 320 if (conn->state == NETCONN_WRITE) {
robert_jw 0:b2805b6888dc 321 do_writemore(conn);
robert_jw 0:b2805b6888dc 322 } else if (conn->state == NETCONN_CLOSE) {
robert_jw 0:b2805b6888dc 323 do_close_internal(conn);
robert_jw 0:b2805b6888dc 324 }
robert_jw 0:b2805b6888dc 325
robert_jw 0:b2805b6888dc 326 if (conn) {
robert_jw 0:b2805b6888dc 327 /* If the queued byte- or pbuf-count drops below the configured low-water limit,
robert_jw 0:b2805b6888dc 328 let select mark this pcb as writable again. */
robert_jw 0:b2805b6888dc 329 if ((conn->pcb.tcp != NULL) && (tcp_sndbuf(conn->pcb.tcp) > TCP_SNDLOWAT) &&
robert_jw 0:b2805b6888dc 330 (tcp_sndqueuelen(conn->pcb.tcp) < TCP_SNDQUEUELOWAT)) {
robert_jw 0:b2805b6888dc 331 conn->flags &= ~NETCONN_FLAG_CHECK_WRITESPACE;
robert_jw 0:b2805b6888dc 332 API_EVENT(conn, NETCONN_EVT_SENDPLUS, len);
robert_jw 0:b2805b6888dc 333 }
robert_jw 0:b2805b6888dc 334 }
robert_jw 0:b2805b6888dc 335
robert_jw 0:b2805b6888dc 336 return ERR_OK;
robert_jw 0:b2805b6888dc 337 }
robert_jw 0:b2805b6888dc 338
robert_jw 0:b2805b6888dc 339 /**
robert_jw 0:b2805b6888dc 340 * Error callback function for TCP netconns.
robert_jw 0:b2805b6888dc 341 * Signals conn->sem, posts to all conn mboxes and calls API_EVENT.
robert_jw 0:b2805b6888dc 342 * The application thread has then to decide what to do.
robert_jw 0:b2805b6888dc 343 *
robert_jw 0:b2805b6888dc 344 * @see tcp.h (struct tcp_pcb.err) for parameters
robert_jw 0:b2805b6888dc 345 */
robert_jw 0:b2805b6888dc 346 static void
robert_jw 0:b2805b6888dc 347 err_tcp(void *arg, err_t err)
robert_jw 0:b2805b6888dc 348 {
robert_jw 0:b2805b6888dc 349 struct netconn *conn;
robert_jw 0:b2805b6888dc 350 enum netconn_state old_state;
robert_jw 0:b2805b6888dc 351 SYS_ARCH_DECL_PROTECT(lev);
robert_jw 0:b2805b6888dc 352
robert_jw 0:b2805b6888dc 353 conn = (struct netconn *)arg;
robert_jw 0:b2805b6888dc 354 LWIP_ASSERT("conn != NULL", (conn != NULL));
robert_jw 0:b2805b6888dc 355
robert_jw 0:b2805b6888dc 356 conn->pcb.tcp = NULL;
robert_jw 0:b2805b6888dc 357
robert_jw 0:b2805b6888dc 358 /* no check since this is always fatal! */
robert_jw 0:b2805b6888dc 359 SYS_ARCH_PROTECT(lev);
robert_jw 0:b2805b6888dc 360 conn->last_err = err;
robert_jw 0:b2805b6888dc 361 SYS_ARCH_UNPROTECT(lev);
robert_jw 0:b2805b6888dc 362
robert_jw 0:b2805b6888dc 363 /* reset conn->state now before waking up other threads */
robert_jw 0:b2805b6888dc 364 old_state = conn->state;
robert_jw 0:b2805b6888dc 365 conn->state = NETCONN_NONE;
robert_jw 0:b2805b6888dc 366
robert_jw 0:b2805b6888dc 367 /* Notify the user layer about a connection error. Used to signal
robert_jw 0:b2805b6888dc 368 select. */
robert_jw 0:b2805b6888dc 369 API_EVENT(conn, NETCONN_EVT_ERROR, 0);
robert_jw 0:b2805b6888dc 370 /* Try to release selects pending on 'read' or 'write', too.
robert_jw 0:b2805b6888dc 371 They will get an error if they actually try to read or write. */
robert_jw 0:b2805b6888dc 372 API_EVENT(conn, NETCONN_EVT_RCVPLUS, 0);
robert_jw 0:b2805b6888dc 373 API_EVENT(conn, NETCONN_EVT_SENDPLUS, 0);
robert_jw 0:b2805b6888dc 374
robert_jw 0:b2805b6888dc 375 /* pass NULL-message to recvmbox to wake up pending recv */
robert_jw 0:b2805b6888dc 376 if (sys_mbox_valid(&conn->recvmbox)) {
robert_jw 0:b2805b6888dc 377 /* use trypost to prevent deadlock */
robert_jw 0:b2805b6888dc 378 sys_mbox_trypost(&conn->recvmbox, NULL);
robert_jw 0:b2805b6888dc 379 }
robert_jw 0:b2805b6888dc 380 /* pass NULL-message to acceptmbox to wake up pending accept */
robert_jw 0:b2805b6888dc 381 if (sys_mbox_valid(&conn->acceptmbox)) {
robert_jw 0:b2805b6888dc 382 /* use trypost to preven deadlock */
robert_jw 0:b2805b6888dc 383 sys_mbox_trypost(&conn->acceptmbox, NULL);
robert_jw 0:b2805b6888dc 384 }
robert_jw 0:b2805b6888dc 385
robert_jw 0:b2805b6888dc 386 if ((old_state == NETCONN_WRITE) || (old_state == NETCONN_CLOSE) ||
robert_jw 0:b2805b6888dc 387 (old_state == NETCONN_CONNECT)) {
robert_jw 0:b2805b6888dc 388 /* calling do_writemore/do_close_internal is not necessary
robert_jw 0:b2805b6888dc 389 since the pcb has already been deleted! */
robert_jw 0:b2805b6888dc 390 int was_nonblocking_connect = IN_NONBLOCKING_CONNECT(conn);
robert_jw 0:b2805b6888dc 391 SET_NONBLOCKING_CONNECT(conn, 0);
robert_jw 0:b2805b6888dc 392
robert_jw 0:b2805b6888dc 393 if (!was_nonblocking_connect) {
robert_jw 0:b2805b6888dc 394 /* set error return code */
robert_jw 0:b2805b6888dc 395 LWIP_ASSERT("conn->current_msg != NULL", conn->current_msg != NULL);
robert_jw 0:b2805b6888dc 396 conn->current_msg->err = err;
robert_jw 0:b2805b6888dc 397 conn->current_msg = NULL;
robert_jw 0:b2805b6888dc 398 /* wake up the waiting task */
robert_jw 0:b2805b6888dc 399 sys_sem_signal(&conn->op_completed);
robert_jw 0:b2805b6888dc 400 }
robert_jw 0:b2805b6888dc 401 } else {
robert_jw 0:b2805b6888dc 402 LWIP_ASSERT("conn->current_msg == NULL", conn->current_msg == NULL);
robert_jw 0:b2805b6888dc 403 }
robert_jw 0:b2805b6888dc 404 }
robert_jw 0:b2805b6888dc 405
robert_jw 0:b2805b6888dc 406 /**
robert_jw 0:b2805b6888dc 407 * Setup a tcp_pcb with the correct callback function pointers
robert_jw 0:b2805b6888dc 408 * and their arguments.
robert_jw 0:b2805b6888dc 409 *
robert_jw 0:b2805b6888dc 410 * @param conn the TCP netconn to setup
robert_jw 0:b2805b6888dc 411 */
robert_jw 0:b2805b6888dc 412 static void
robert_jw 0:b2805b6888dc 413 setup_tcp(struct netconn *conn)
robert_jw 0:b2805b6888dc 414 {
robert_jw 0:b2805b6888dc 415 struct tcp_pcb *pcb;
robert_jw 0:b2805b6888dc 416
robert_jw 0:b2805b6888dc 417 pcb = conn->pcb.tcp;
robert_jw 0:b2805b6888dc 418 tcp_arg(pcb, conn);
robert_jw 0:b2805b6888dc 419 tcp_recv(pcb, recv_tcp);
robert_jw 0:b2805b6888dc 420 tcp_sent(pcb, sent_tcp);
robert_jw 0:b2805b6888dc 421 tcp_poll(pcb, poll_tcp, 4);
robert_jw 0:b2805b6888dc 422 tcp_err(pcb, err_tcp);
robert_jw 0:b2805b6888dc 423 }
robert_jw 0:b2805b6888dc 424
robert_jw 0:b2805b6888dc 425 /**
robert_jw 0:b2805b6888dc 426 * Accept callback function for TCP netconns.
robert_jw 0:b2805b6888dc 427 * Allocates a new netconn and posts that to conn->acceptmbox.
robert_jw 0:b2805b6888dc 428 *
robert_jw 0:b2805b6888dc 429 * @see tcp.h (struct tcp_pcb_listen.accept) for parameters and return value
robert_jw 0:b2805b6888dc 430 */
robert_jw 0:b2805b6888dc 431 static err_t
robert_jw 0:b2805b6888dc 432 accept_function(void *arg, struct tcp_pcb *newpcb, err_t err)
robert_jw 0:b2805b6888dc 433 {
robert_jw 0:b2805b6888dc 434 struct netconn *newconn;
robert_jw 0:b2805b6888dc 435 struct netconn *conn = (struct netconn *)arg;
robert_jw 0:b2805b6888dc 436
robert_jw 0:b2805b6888dc 437 LWIP_DEBUGF(API_MSG_DEBUG, ("accept_function: newpcb->tate: %s\n", tcp_debug_state_str(newpcb->state)));
robert_jw 0:b2805b6888dc 438
robert_jw 0:b2805b6888dc 439 if (!sys_mbox_valid(&conn->acceptmbox)) {
robert_jw 0:b2805b6888dc 440 LWIP_DEBUGF(API_MSG_DEBUG, ("accept_function: acceptmbox already deleted\n"));
robert_jw 0:b2805b6888dc 441 return ERR_VAL;
robert_jw 0:b2805b6888dc 442 }
robert_jw 0:b2805b6888dc 443
robert_jw 0:b2805b6888dc 444 /* We have to set the callback here even though
robert_jw 0:b2805b6888dc 445 * the new socket is unknown. conn->socket is marked as -1. */
robert_jw 0:b2805b6888dc 446 newconn = netconn_alloc(conn->type, conn->callback);
robert_jw 0:b2805b6888dc 447 if (newconn == NULL) {
robert_jw 0:b2805b6888dc 448 return ERR_MEM;
robert_jw 0:b2805b6888dc 449 }
robert_jw 0:b2805b6888dc 450 newconn->pcb.tcp = newpcb;
robert_jw 0:b2805b6888dc 451 setup_tcp(newconn);
robert_jw 0:b2805b6888dc 452 /* no protection: when creating the pcb, the netconn is not yet known
robert_jw 0:b2805b6888dc 453 to the application thread */
robert_jw 0:b2805b6888dc 454 newconn->last_err = err;
robert_jw 0:b2805b6888dc 455
robert_jw 0:b2805b6888dc 456 if (sys_mbox_trypost(&conn->acceptmbox, newconn) != ERR_OK) {
robert_jw 0:b2805b6888dc 457 /* When returning != ERR_OK, the pcb is aborted in tcp_process(),
robert_jw 0:b2805b6888dc 458 so do nothing here! */
robert_jw 0:b2805b6888dc 459 newconn->pcb.tcp = NULL;
robert_jw 0:b2805b6888dc 460 /* no need to drain since we know the recvmbox is empty. */
robert_jw 0:b2805b6888dc 461 sys_mbox_free(&newconn->recvmbox);
robert_jw 0:b2805b6888dc 462 sys_mbox_set_invalid(&newconn->recvmbox);
robert_jw 0:b2805b6888dc 463 netconn_free(newconn);
robert_jw 0:b2805b6888dc 464 return ERR_MEM;
robert_jw 0:b2805b6888dc 465 } else {
robert_jw 0:b2805b6888dc 466 /* Register event with callback */
robert_jw 0:b2805b6888dc 467 API_EVENT(conn, NETCONN_EVT_RCVPLUS, 0);
robert_jw 0:b2805b6888dc 468 }
robert_jw 0:b2805b6888dc 469
robert_jw 0:b2805b6888dc 470 return ERR_OK;
robert_jw 0:b2805b6888dc 471 }
robert_jw 0:b2805b6888dc 472 #endif /* LWIP_TCP */
robert_jw 0:b2805b6888dc 473
robert_jw 0:b2805b6888dc 474 /**
robert_jw 0:b2805b6888dc 475 * Create a new pcb of a specific type.
robert_jw 0:b2805b6888dc 476 * Called from do_newconn().
robert_jw 0:b2805b6888dc 477 *
robert_jw 0:b2805b6888dc 478 * @param msg the api_msg_msg describing the connection type
robert_jw 0:b2805b6888dc 479 * @return msg->conn->err, but the return value is currently ignored
robert_jw 0:b2805b6888dc 480 */
robert_jw 0:b2805b6888dc 481 static void
robert_jw 0:b2805b6888dc 482 pcb_new(struct api_msg_msg *msg)
robert_jw 0:b2805b6888dc 483 {
robert_jw 0:b2805b6888dc 484 LWIP_ASSERT("pcb_new: pcb already allocated", msg->conn->pcb.tcp == NULL);
robert_jw 0:b2805b6888dc 485
robert_jw 0:b2805b6888dc 486 /* Allocate a PCB for this connection */
robert_jw 0:b2805b6888dc 487 switch(NETCONNTYPE_GROUP(msg->conn->type)) {
robert_jw 0:b2805b6888dc 488 #if LWIP_RAW
robert_jw 0:b2805b6888dc 489 case NETCONN_RAW:
robert_jw 0:b2805b6888dc 490 msg->conn->pcb.raw = raw_new(msg->msg.n.proto);
robert_jw 0:b2805b6888dc 491 if(msg->conn->pcb.raw == NULL) {
robert_jw 0:b2805b6888dc 492 msg->err = ERR_MEM;
robert_jw 0:b2805b6888dc 493 break;
robert_jw 0:b2805b6888dc 494 }
robert_jw 0:b2805b6888dc 495 raw_recv(msg->conn->pcb.raw, recv_raw, msg->conn);
robert_jw 0:b2805b6888dc 496 break;
robert_jw 0:b2805b6888dc 497 #endif /* LWIP_RAW */
robert_jw 0:b2805b6888dc 498 #if LWIP_UDP
robert_jw 0:b2805b6888dc 499 case NETCONN_UDP:
robert_jw 0:b2805b6888dc 500 msg->conn->pcb.udp = udp_new();
robert_jw 0:b2805b6888dc 501 if(msg->conn->pcb.udp == NULL) {
robert_jw 0:b2805b6888dc 502 msg->err = ERR_MEM;
robert_jw 0:b2805b6888dc 503 break;
robert_jw 0:b2805b6888dc 504 }
robert_jw 0:b2805b6888dc 505 #if LWIP_UDPLITE
robert_jw 0:b2805b6888dc 506 if (msg->conn->type==NETCONN_UDPLITE) {
robert_jw 0:b2805b6888dc 507 udp_setflags(msg->conn->pcb.udp, UDP_FLAGS_UDPLITE);
robert_jw 0:b2805b6888dc 508 }
robert_jw 0:b2805b6888dc 509 #endif /* LWIP_UDPLITE */
robert_jw 0:b2805b6888dc 510 if (msg->conn->type==NETCONN_UDPNOCHKSUM) {
robert_jw 0:b2805b6888dc 511 udp_setflags(msg->conn->pcb.udp, UDP_FLAGS_NOCHKSUM);
robert_jw 0:b2805b6888dc 512 }
robert_jw 0:b2805b6888dc 513 udp_recv(msg->conn->pcb.udp, recv_udp, msg->conn);
robert_jw 0:b2805b6888dc 514 break;
robert_jw 0:b2805b6888dc 515 #endif /* LWIP_UDP */
robert_jw 0:b2805b6888dc 516 #if LWIP_TCP
robert_jw 0:b2805b6888dc 517 case NETCONN_TCP:
robert_jw 0:b2805b6888dc 518 msg->conn->pcb.tcp = tcp_new();
robert_jw 0:b2805b6888dc 519 if(msg->conn->pcb.tcp == NULL) {
robert_jw 0:b2805b6888dc 520 msg->err = ERR_MEM;
robert_jw 0:b2805b6888dc 521 break;
robert_jw 0:b2805b6888dc 522 }
robert_jw 0:b2805b6888dc 523 setup_tcp(msg->conn);
robert_jw 0:b2805b6888dc 524 break;
robert_jw 0:b2805b6888dc 525 #endif /* LWIP_TCP */
robert_jw 0:b2805b6888dc 526 default:
robert_jw 0:b2805b6888dc 527 /* Unsupported netconn type, e.g. protocol disabled */
robert_jw 0:b2805b6888dc 528 msg->err = ERR_VAL;
robert_jw 0:b2805b6888dc 529 break;
robert_jw 0:b2805b6888dc 530 }
robert_jw 0:b2805b6888dc 531 }
robert_jw 0:b2805b6888dc 532
robert_jw 0:b2805b6888dc 533 /**
robert_jw 0:b2805b6888dc 534 * Create a new pcb of a specific type inside a netconn.
robert_jw 0:b2805b6888dc 535 * Called from netconn_new_with_proto_and_callback.
robert_jw 0:b2805b6888dc 536 *
robert_jw 0:b2805b6888dc 537 * @param msg the api_msg_msg describing the connection type
robert_jw 0:b2805b6888dc 538 */
robert_jw 0:b2805b6888dc 539 void
robert_jw 0:b2805b6888dc 540 do_newconn(struct api_msg_msg *msg)
robert_jw 0:b2805b6888dc 541 {
robert_jw 0:b2805b6888dc 542 msg->err = ERR_OK;
robert_jw 0:b2805b6888dc 543 if(msg->conn->pcb.tcp == NULL) {
robert_jw 0:b2805b6888dc 544 pcb_new(msg);
robert_jw 0:b2805b6888dc 545 }
robert_jw 0:b2805b6888dc 546 /* Else? This "new" connection already has a PCB allocated. */
robert_jw 0:b2805b6888dc 547 /* Is this an error condition? Should it be deleted? */
robert_jw 0:b2805b6888dc 548 /* We currently just are happy and return. */
robert_jw 0:b2805b6888dc 549
robert_jw 0:b2805b6888dc 550 TCPIP_APIMSG_ACK(msg);
robert_jw 0:b2805b6888dc 551 }
robert_jw 0:b2805b6888dc 552
robert_jw 0:b2805b6888dc 553 /**
robert_jw 0:b2805b6888dc 554 * Create a new netconn (of a specific type) that has a callback function.
robert_jw 0:b2805b6888dc 555 * The corresponding pcb is NOT created!
robert_jw 0:b2805b6888dc 556 *
robert_jw 0:b2805b6888dc 557 * @param t the type of 'connection' to create (@see enum netconn_type)
robert_jw 0:b2805b6888dc 558 * @param proto the IP protocol for RAW IP pcbs
robert_jw 0:b2805b6888dc 559 * @param callback a function to call on status changes (RX available, TX'ed)
robert_jw 0:b2805b6888dc 560 * @return a newly allocated struct netconn or
robert_jw 0:b2805b6888dc 561 * NULL on memory error
robert_jw 0:b2805b6888dc 562 */
robert_jw 0:b2805b6888dc 563 struct netconn*
robert_jw 0:b2805b6888dc 564 netconn_alloc(enum netconn_type t, netconn_callback callback)
robert_jw 0:b2805b6888dc 565 {
robert_jw 0:b2805b6888dc 566 struct netconn *conn;
robert_jw 0:b2805b6888dc 567 int size;
robert_jw 0:b2805b6888dc 568
robert_jw 0:b2805b6888dc 569 conn = (struct netconn *)memp_malloc(MEMP_NETCONN);
robert_jw 0:b2805b6888dc 570 if (conn == NULL) {
robert_jw 0:b2805b6888dc 571 return NULL;
robert_jw 0:b2805b6888dc 572 }
robert_jw 0:b2805b6888dc 573
robert_jw 0:b2805b6888dc 574 conn->last_err = ERR_OK;
robert_jw 0:b2805b6888dc 575 conn->type = t;
robert_jw 0:b2805b6888dc 576 conn->pcb.tcp = NULL;
robert_jw 0:b2805b6888dc 577
robert_jw 0:b2805b6888dc 578 #if (DEFAULT_RAW_RECVMBOX_SIZE == DEFAULT_UDP_RECVMBOX_SIZE) && \
robert_jw 0:b2805b6888dc 579 (DEFAULT_RAW_RECVMBOX_SIZE == DEFAULT_TCP_RECVMBOX_SIZE)
robert_jw 0:b2805b6888dc 580 size = DEFAULT_RAW_RECVMBOX_SIZE;
robert_jw 0:b2805b6888dc 581 #else
robert_jw 0:b2805b6888dc 582 switch(NETCONNTYPE_GROUP(t)) {
robert_jw 0:b2805b6888dc 583 #if LWIP_RAW
robert_jw 0:b2805b6888dc 584 case NETCONN_RAW:
robert_jw 0:b2805b6888dc 585 size = DEFAULT_RAW_RECVMBOX_SIZE;
robert_jw 0:b2805b6888dc 586 break;
robert_jw 0:b2805b6888dc 587 #endif /* LWIP_RAW */
robert_jw 0:b2805b6888dc 588 #if LWIP_UDP
robert_jw 0:b2805b6888dc 589 case NETCONN_UDP:
robert_jw 0:b2805b6888dc 590 size = DEFAULT_UDP_RECVMBOX_SIZE;
robert_jw 0:b2805b6888dc 591 break;
robert_jw 0:b2805b6888dc 592 #endif /* LWIP_UDP */
robert_jw 0:b2805b6888dc 593 #if LWIP_TCP
robert_jw 0:b2805b6888dc 594 case NETCONN_TCP:
robert_jw 0:b2805b6888dc 595 size = DEFAULT_TCP_RECVMBOX_SIZE;
robert_jw 0:b2805b6888dc 596 break;
robert_jw 0:b2805b6888dc 597 #endif /* LWIP_TCP */
robert_jw 0:b2805b6888dc 598 default:
robert_jw 0:b2805b6888dc 599 LWIP_ASSERT("netconn_alloc: undefined netconn_type", 0);
robert_jw 0:b2805b6888dc 600 break;
robert_jw 0:b2805b6888dc 601 }
robert_jw 0:b2805b6888dc 602 #endif
robert_jw 0:b2805b6888dc 603
robert_jw 0:b2805b6888dc 604 if (sys_sem_new(&conn->op_completed, 0) != ERR_OK) {
robert_jw 0:b2805b6888dc 605 memp_free(MEMP_NETCONN, conn);
robert_jw 0:b2805b6888dc 606 return NULL;
robert_jw 0:b2805b6888dc 607 }
robert_jw 0:b2805b6888dc 608 if (sys_mbox_new(&conn->recvmbox, size) != ERR_OK) {
robert_jw 0:b2805b6888dc 609 sys_sem_free(&conn->op_completed);
robert_jw 0:b2805b6888dc 610 memp_free(MEMP_NETCONN, conn);
robert_jw 0:b2805b6888dc 611 return NULL;
robert_jw 0:b2805b6888dc 612 }
robert_jw 0:b2805b6888dc 613
robert_jw 0:b2805b6888dc 614 #if LWIP_TCP
robert_jw 0:b2805b6888dc 615 sys_mbox_set_invalid(&conn->acceptmbox);
robert_jw 0:b2805b6888dc 616 #endif
robert_jw 0:b2805b6888dc 617 conn->state = NETCONN_NONE;
robert_jw 0:b2805b6888dc 618 #if LWIP_SOCKET
robert_jw 0:b2805b6888dc 619 /* initialize socket to -1 since 0 is a valid socket */
robert_jw 0:b2805b6888dc 620 conn->socket = -1;
robert_jw 0:b2805b6888dc 621 #endif /* LWIP_SOCKET */
robert_jw 0:b2805b6888dc 622 conn->callback = callback;
robert_jw 0:b2805b6888dc 623 #if LWIP_TCP
robert_jw 0:b2805b6888dc 624 conn->current_msg = NULL;
robert_jw 0:b2805b6888dc 625 conn->write_offset = 0;
robert_jw 0:b2805b6888dc 626 #endif /* LWIP_TCP */
robert_jw 0:b2805b6888dc 627 #if LWIP_SO_RCVTIMEO
robert_jw 0:b2805b6888dc 628 conn->recv_timeout = 0;
robert_jw 0:b2805b6888dc 629 #endif /* LWIP_SO_RCVTIMEO */
robert_jw 0:b2805b6888dc 630 #if LWIP_SO_RCVBUF
robert_jw 0:b2805b6888dc 631 conn->recv_bufsize = RECV_BUFSIZE_DEFAULT;
robert_jw 0:b2805b6888dc 632 conn->recv_avail = 0;
robert_jw 0:b2805b6888dc 633 #endif /* LWIP_SO_RCVBUF */
robert_jw 0:b2805b6888dc 634 conn->flags = 0;
robert_jw 0:b2805b6888dc 635 return conn;
robert_jw 0:b2805b6888dc 636 }
robert_jw 0:b2805b6888dc 637
robert_jw 0:b2805b6888dc 638 /**
robert_jw 0:b2805b6888dc 639 * Delete a netconn and all its resources.
robert_jw 0:b2805b6888dc 640 * The pcb is NOT freed (since we might not be in the right thread context do this).
robert_jw 0:b2805b6888dc 641 *
robert_jw 0:b2805b6888dc 642 * @param conn the netconn to free
robert_jw 0:b2805b6888dc 643 */
robert_jw 0:b2805b6888dc 644 void
robert_jw 0:b2805b6888dc 645 netconn_free(struct netconn *conn)
robert_jw 0:b2805b6888dc 646 {
robert_jw 0:b2805b6888dc 647 LWIP_ASSERT("PCB must be deallocated outside this function", conn->pcb.tcp == NULL);
robert_jw 0:b2805b6888dc 648 LWIP_ASSERT("recvmbox must be deallocated before calling this function",
robert_jw 0:b2805b6888dc 649 !sys_mbox_valid(&conn->recvmbox));
robert_jw 0:b2805b6888dc 650 #if LWIP_TCP
robert_jw 0:b2805b6888dc 651 LWIP_ASSERT("acceptmbox must be deallocated before calling this function",
robert_jw 0:b2805b6888dc 652 !sys_mbox_valid(&conn->acceptmbox));
robert_jw 0:b2805b6888dc 653 #endif /* LWIP_TCP */
robert_jw 0:b2805b6888dc 654
robert_jw 0:b2805b6888dc 655 sys_sem_free(&conn->op_completed);
robert_jw 0:b2805b6888dc 656 sys_sem_set_invalid(&conn->op_completed);
robert_jw 0:b2805b6888dc 657
robert_jw 0:b2805b6888dc 658 memp_free(MEMP_NETCONN, conn);
robert_jw 0:b2805b6888dc 659 }
robert_jw 0:b2805b6888dc 660
robert_jw 0:b2805b6888dc 661 /**
robert_jw 0:b2805b6888dc 662 * Delete rcvmbox and acceptmbox of a netconn and free the left-over data in
robert_jw 0:b2805b6888dc 663 * these mboxes
robert_jw 0:b2805b6888dc 664 *
robert_jw 0:b2805b6888dc 665 * @param conn the netconn to free
robert_jw 0:b2805b6888dc 666 * @bytes_drained bytes drained from recvmbox
robert_jw 0:b2805b6888dc 667 * @accepts_drained pending connections drained from acceptmbox
robert_jw 0:b2805b6888dc 668 */
robert_jw 0:b2805b6888dc 669 static void
robert_jw 0:b2805b6888dc 670 netconn_drain(struct netconn *conn)
robert_jw 0:b2805b6888dc 671 {
robert_jw 0:b2805b6888dc 672 void *mem;
robert_jw 0:b2805b6888dc 673 #if LWIP_TCP
robert_jw 0:b2805b6888dc 674 struct pbuf *p;
robert_jw 0:b2805b6888dc 675 #endif /* LWIP_TCP */
robert_jw 0:b2805b6888dc 676
robert_jw 0:b2805b6888dc 677 /* This runs in tcpip_thread, so we don't need to lock against rx packets */
robert_jw 0:b2805b6888dc 678
robert_jw 0:b2805b6888dc 679 /* Delete and drain the recvmbox. */
robert_jw 0:b2805b6888dc 680 if (sys_mbox_valid(&conn->recvmbox)) {
robert_jw 0:b2805b6888dc 681 while (sys_mbox_tryfetch(&conn->recvmbox, &mem) != SYS_MBOX_EMPTY) {
robert_jw 0:b2805b6888dc 682 #if LWIP_TCP
robert_jw 0:b2805b6888dc 683 if (conn->type == NETCONN_TCP) {
robert_jw 0:b2805b6888dc 684 if(mem != NULL) {
robert_jw 0:b2805b6888dc 685 p = (struct pbuf*)mem;
robert_jw 0:b2805b6888dc 686 /* pcb might be set to NULL already by err_tcp() */
robert_jw 0:b2805b6888dc 687 if (conn->pcb.tcp != NULL) {
robert_jw 0:b2805b6888dc 688 tcp_recved(conn->pcb.tcp, p->tot_len);
robert_jw 0:b2805b6888dc 689 }
robert_jw 0:b2805b6888dc 690 pbuf_free(p);
robert_jw 0:b2805b6888dc 691 }
robert_jw 0:b2805b6888dc 692 } else
robert_jw 0:b2805b6888dc 693 #endif /* LWIP_TCP */
robert_jw 0:b2805b6888dc 694 {
robert_jw 0:b2805b6888dc 695 netbuf_delete((struct netbuf *)mem);
robert_jw 0:b2805b6888dc 696 }
robert_jw 0:b2805b6888dc 697 }
robert_jw 0:b2805b6888dc 698 sys_mbox_free(&conn->recvmbox);
robert_jw 0:b2805b6888dc 699 sys_mbox_set_invalid(&conn->recvmbox);
robert_jw 0:b2805b6888dc 700 }
robert_jw 0:b2805b6888dc 701
robert_jw 0:b2805b6888dc 702 /* Delete and drain the acceptmbox. */
robert_jw 0:b2805b6888dc 703 #if LWIP_TCP
robert_jw 0:b2805b6888dc 704 if (sys_mbox_valid(&conn->acceptmbox)) {
robert_jw 0:b2805b6888dc 705 while (sys_mbox_tryfetch(&conn->acceptmbox, &mem) != SYS_MBOX_EMPTY) {
robert_jw 0:b2805b6888dc 706 struct netconn *newconn = (struct netconn *)mem;
robert_jw 0:b2805b6888dc 707 /* Only tcp pcbs have an acceptmbox, so no need to check conn->type */
robert_jw 0:b2805b6888dc 708 /* pcb might be set to NULL already by err_tcp() */
robert_jw 0:b2805b6888dc 709 if (conn->pcb.tcp != NULL) {
robert_jw 0:b2805b6888dc 710 tcp_accepted(conn->pcb.tcp);
robert_jw 0:b2805b6888dc 711 }
robert_jw 0:b2805b6888dc 712 /* drain recvmbox */
robert_jw 0:b2805b6888dc 713 netconn_drain(newconn);
robert_jw 0:b2805b6888dc 714 if (newconn->pcb.tcp != NULL) {
robert_jw 0:b2805b6888dc 715 tcp_abort(newconn->pcb.tcp);
robert_jw 0:b2805b6888dc 716 newconn->pcb.tcp = NULL;
robert_jw 0:b2805b6888dc 717 }
robert_jw 0:b2805b6888dc 718 netconn_free(newconn);
robert_jw 0:b2805b6888dc 719 }
robert_jw 0:b2805b6888dc 720 sys_mbox_free(&conn->acceptmbox);
robert_jw 0:b2805b6888dc 721 sys_mbox_set_invalid(&conn->acceptmbox);
robert_jw 0:b2805b6888dc 722 }
robert_jw 0:b2805b6888dc 723 #endif /* LWIP_TCP */
robert_jw 0:b2805b6888dc 724 }
robert_jw 0:b2805b6888dc 725
robert_jw 0:b2805b6888dc 726 #if LWIP_TCP
robert_jw 0:b2805b6888dc 727 /**
robert_jw 0:b2805b6888dc 728 * Internal helper function to close a TCP netconn: since this sometimes
robert_jw 0:b2805b6888dc 729 * doesn't work at the first attempt, this function is called from multiple
robert_jw 0:b2805b6888dc 730 * places.
robert_jw 0:b2805b6888dc 731 *
robert_jw 0:b2805b6888dc 732 * @param conn the TCP netconn to close
robert_jw 0:b2805b6888dc 733 */
robert_jw 0:b2805b6888dc 734 static void
robert_jw 0:b2805b6888dc 735 do_close_internal(struct netconn *conn)
robert_jw 0:b2805b6888dc 736 {
robert_jw 0:b2805b6888dc 737 err_t err;
robert_jw 0:b2805b6888dc 738 u8_t shut, shut_rx, shut_tx, close;
robert_jw 0:b2805b6888dc 739
robert_jw 0:b2805b6888dc 740 LWIP_ASSERT("invalid conn", (conn != NULL));
robert_jw 0:b2805b6888dc 741 LWIP_ASSERT("this is for tcp netconns only", (conn->type == NETCONN_TCP));
robert_jw 0:b2805b6888dc 742 LWIP_ASSERT("conn must be in state NETCONN_CLOSE", (conn->state == NETCONN_CLOSE));
robert_jw 0:b2805b6888dc 743 LWIP_ASSERT("pcb already closed", (conn->pcb.tcp != NULL));
robert_jw 0:b2805b6888dc 744 LWIP_ASSERT("conn->current_msg != NULL", conn->current_msg != NULL);
robert_jw 0:b2805b6888dc 745
robert_jw 0:b2805b6888dc 746 shut = conn->current_msg->msg.sd.shut;
robert_jw 0:b2805b6888dc 747 shut_rx = shut & NETCONN_SHUT_RD;
robert_jw 0:b2805b6888dc 748 shut_tx = shut & NETCONN_SHUT_WR;
robert_jw 0:b2805b6888dc 749 /* shutting down both ends is the same as closing */
robert_jw 0:b2805b6888dc 750 close = shut == NETCONN_SHUT_RDWR;
robert_jw 0:b2805b6888dc 751
robert_jw 0:b2805b6888dc 752 /* Set back some callback pointers */
robert_jw 0:b2805b6888dc 753 if (close) {
robert_jw 0:b2805b6888dc 754 tcp_arg(conn->pcb.tcp, NULL);
robert_jw 0:b2805b6888dc 755 }
robert_jw 0:b2805b6888dc 756 if (conn->pcb.tcp->state == LISTEN) {
robert_jw 0:b2805b6888dc 757 tcp_accept(conn->pcb.tcp, NULL);
robert_jw 0:b2805b6888dc 758 } else {
robert_jw 0:b2805b6888dc 759 /* some callbacks have to be reset if tcp_close is not successful */
robert_jw 0:b2805b6888dc 760 if (shut_rx) {
robert_jw 0:b2805b6888dc 761 tcp_recv(conn->pcb.tcp, NULL);
robert_jw 0:b2805b6888dc 762 tcp_accept(conn->pcb.tcp, NULL);
robert_jw 0:b2805b6888dc 763 }
robert_jw 0:b2805b6888dc 764 if (shut_tx) {
robert_jw 0:b2805b6888dc 765 tcp_sent(conn->pcb.tcp, NULL);
robert_jw 0:b2805b6888dc 766 }
robert_jw 0:b2805b6888dc 767 if (close) {
robert_jw 0:b2805b6888dc 768 tcp_poll(conn->pcb.tcp, NULL, 4);
robert_jw 0:b2805b6888dc 769 tcp_err(conn->pcb.tcp, NULL);
robert_jw 0:b2805b6888dc 770 }
robert_jw 0:b2805b6888dc 771 }
robert_jw 0:b2805b6888dc 772 /* Try to close the connection */
robert_jw 0:b2805b6888dc 773 if (shut == NETCONN_SHUT_RDWR) {
robert_jw 0:b2805b6888dc 774 err = tcp_close(conn->pcb.tcp);
robert_jw 0:b2805b6888dc 775 } else {
robert_jw 0:b2805b6888dc 776 err = tcp_shutdown(conn->pcb.tcp, shut & NETCONN_SHUT_RD, shut & NETCONN_SHUT_WR);
robert_jw 0:b2805b6888dc 777 }
robert_jw 0:b2805b6888dc 778 if (err == ERR_OK) {
robert_jw 0:b2805b6888dc 779 /* Closing succeeded */
robert_jw 0:b2805b6888dc 780 conn->current_msg->err = ERR_OK;
robert_jw 0:b2805b6888dc 781 conn->current_msg = NULL;
robert_jw 0:b2805b6888dc 782 conn->state = NETCONN_NONE;
robert_jw 0:b2805b6888dc 783 /* Set back some callback pointers as conn is going away */
robert_jw 0:b2805b6888dc 784 conn->pcb.tcp = NULL;
robert_jw 0:b2805b6888dc 785 /* Trigger select() in socket layer. Make sure everybody notices activity
robert_jw 0:b2805b6888dc 786 on the connection, error first! */
robert_jw 0:b2805b6888dc 787 if (close) {
robert_jw 0:b2805b6888dc 788 API_EVENT(conn, NETCONN_EVT_ERROR, 0);
robert_jw 0:b2805b6888dc 789 }
robert_jw 0:b2805b6888dc 790 if (shut_rx) {
robert_jw 0:b2805b6888dc 791 API_EVENT(conn, NETCONN_EVT_RCVPLUS, 0);
robert_jw 0:b2805b6888dc 792 }
robert_jw 0:b2805b6888dc 793 if (shut_tx) {
robert_jw 0:b2805b6888dc 794 API_EVENT(conn, NETCONN_EVT_SENDPLUS, 0);
robert_jw 0:b2805b6888dc 795 }
robert_jw 0:b2805b6888dc 796 /* wake up the application task */
robert_jw 0:b2805b6888dc 797 sys_sem_signal(&conn->op_completed);
robert_jw 0:b2805b6888dc 798 } else {
robert_jw 0:b2805b6888dc 799 /* Closing failed, restore some of the callbacks */
robert_jw 0:b2805b6888dc 800 /* Closing of listen pcb will never fail! */
robert_jw 0:b2805b6888dc 801 LWIP_ASSERT("Closing a listen pcb may not fail!", (conn->pcb.tcp->state != LISTEN));
robert_jw 0:b2805b6888dc 802 tcp_sent(conn->pcb.tcp, sent_tcp);
robert_jw 0:b2805b6888dc 803 tcp_poll(conn->pcb.tcp, poll_tcp, 4);
robert_jw 0:b2805b6888dc 804 tcp_err(conn->pcb.tcp, err_tcp);
robert_jw 0:b2805b6888dc 805 tcp_arg(conn->pcb.tcp, conn);
robert_jw 0:b2805b6888dc 806 /* don't restore recv callback: we don't want to receive any more data */
robert_jw 0:b2805b6888dc 807 }
robert_jw 0:b2805b6888dc 808 /* If closing didn't succeed, we get called again either
robert_jw 0:b2805b6888dc 809 from poll_tcp or from sent_tcp */
robert_jw 0:b2805b6888dc 810 }
robert_jw 0:b2805b6888dc 811 #endif /* LWIP_TCP */
robert_jw 0:b2805b6888dc 812
robert_jw 0:b2805b6888dc 813 /**
robert_jw 0:b2805b6888dc 814 * Delete the pcb inside a netconn.
robert_jw 0:b2805b6888dc 815 * Called from netconn_delete.
robert_jw 0:b2805b6888dc 816 *
robert_jw 0:b2805b6888dc 817 * @param msg the api_msg_msg pointing to the connection
robert_jw 0:b2805b6888dc 818 */
robert_jw 0:b2805b6888dc 819 void
robert_jw 0:b2805b6888dc 820 do_delconn(struct api_msg_msg *msg)
robert_jw 0:b2805b6888dc 821 {
robert_jw 0:b2805b6888dc 822 /* @todo TCP: abort running write/connect? */
robert_jw 0:b2805b6888dc 823 if ((msg->conn->state != NETCONN_NONE) &&
robert_jw 0:b2805b6888dc 824 (msg->conn->state != NETCONN_LISTEN) &&
robert_jw 0:b2805b6888dc 825 (msg->conn->state != NETCONN_CONNECT)) {
robert_jw 0:b2805b6888dc 826 /* this only happens for TCP netconns */
robert_jw 0:b2805b6888dc 827 LWIP_ASSERT("msg->conn->type == NETCONN_TCP", msg->conn->type == NETCONN_TCP);
robert_jw 0:b2805b6888dc 828 msg->err = ERR_INPROGRESS;
robert_jw 0:b2805b6888dc 829 } else {
robert_jw 0:b2805b6888dc 830 LWIP_ASSERT("blocking connect in progress",
robert_jw 0:b2805b6888dc 831 (msg->conn->state != NETCONN_CONNECT) || IN_NONBLOCKING_CONNECT(msg->conn));
robert_jw 0:b2805b6888dc 832 /* Drain and delete mboxes */
robert_jw 0:b2805b6888dc 833 netconn_drain(msg->conn);
robert_jw 0:b2805b6888dc 834
robert_jw 0:b2805b6888dc 835 if (msg->conn->pcb.tcp != NULL) {
robert_jw 0:b2805b6888dc 836
robert_jw 0:b2805b6888dc 837 switch (NETCONNTYPE_GROUP(msg->conn->type)) {
robert_jw 0:b2805b6888dc 838 #if LWIP_RAW
robert_jw 0:b2805b6888dc 839 case NETCONN_RAW:
robert_jw 0:b2805b6888dc 840 raw_remove(msg->conn->pcb.raw);
robert_jw 0:b2805b6888dc 841 break;
robert_jw 0:b2805b6888dc 842 #endif /* LWIP_RAW */
robert_jw 0:b2805b6888dc 843 #if LWIP_UDP
robert_jw 0:b2805b6888dc 844 case NETCONN_UDP:
robert_jw 0:b2805b6888dc 845 msg->conn->pcb.udp->recv_arg = NULL;
robert_jw 0:b2805b6888dc 846 udp_remove(msg->conn->pcb.udp);
robert_jw 0:b2805b6888dc 847 break;
robert_jw 0:b2805b6888dc 848 #endif /* LWIP_UDP */
robert_jw 0:b2805b6888dc 849 #if LWIP_TCP
robert_jw 0:b2805b6888dc 850 case NETCONN_TCP:
robert_jw 0:b2805b6888dc 851 LWIP_ASSERT("already writing or closing", msg->conn->current_msg == NULL &&
robert_jw 0:b2805b6888dc 852 msg->conn->write_offset == 0);
robert_jw 0:b2805b6888dc 853 msg->conn->state = NETCONN_CLOSE;
robert_jw 0:b2805b6888dc 854 msg->msg.sd.shut = NETCONN_SHUT_RDWR;
robert_jw 0:b2805b6888dc 855 msg->conn->current_msg = msg;
robert_jw 0:b2805b6888dc 856 do_close_internal(msg->conn);
robert_jw 0:b2805b6888dc 857 /* API_EVENT is called inside do_close_internal, before releasing
robert_jw 0:b2805b6888dc 858 the application thread, so we can return at this point! */
robert_jw 0:b2805b6888dc 859 return;
robert_jw 0:b2805b6888dc 860 #endif /* LWIP_TCP */
robert_jw 0:b2805b6888dc 861 default:
robert_jw 0:b2805b6888dc 862 break;
robert_jw 0:b2805b6888dc 863 }
robert_jw 0:b2805b6888dc 864 msg->conn->pcb.tcp = NULL;
robert_jw 0:b2805b6888dc 865 }
robert_jw 0:b2805b6888dc 866 /* tcp netconns don't come here! */
robert_jw 0:b2805b6888dc 867
robert_jw 0:b2805b6888dc 868 /* @todo: this lets select make the socket readable and writable,
robert_jw 0:b2805b6888dc 869 which is wrong! errfd instead? */
robert_jw 0:b2805b6888dc 870 API_EVENT(msg->conn, NETCONN_EVT_RCVPLUS, 0);
robert_jw 0:b2805b6888dc 871 API_EVENT(msg->conn, NETCONN_EVT_SENDPLUS, 0);
robert_jw 0:b2805b6888dc 872 }
robert_jw 0:b2805b6888dc 873 if (sys_sem_valid(&msg->conn->op_completed)) {
robert_jw 0:b2805b6888dc 874 sys_sem_signal(&msg->conn->op_completed);
robert_jw 0:b2805b6888dc 875 }
robert_jw 0:b2805b6888dc 876 }
robert_jw 0:b2805b6888dc 877
robert_jw 0:b2805b6888dc 878 /**
robert_jw 0:b2805b6888dc 879 * Bind a pcb contained in a netconn
robert_jw 0:b2805b6888dc 880 * Called from netconn_bind.
robert_jw 0:b2805b6888dc 881 *
robert_jw 0:b2805b6888dc 882 * @param msg the api_msg_msg pointing to the connection and containing
robert_jw 0:b2805b6888dc 883 * the IP address and port to bind to
robert_jw 0:b2805b6888dc 884 */
robert_jw 0:b2805b6888dc 885 void
robert_jw 0:b2805b6888dc 886 do_bind(struct api_msg_msg *msg)
robert_jw 0:b2805b6888dc 887 {
robert_jw 0:b2805b6888dc 888 if (ERR_IS_FATAL(msg->conn->last_err)) {
robert_jw 0:b2805b6888dc 889 msg->err = msg->conn->last_err;
robert_jw 0:b2805b6888dc 890 } else {
robert_jw 0:b2805b6888dc 891 msg->err = ERR_VAL;
robert_jw 0:b2805b6888dc 892 if (msg->conn->pcb.tcp != NULL) {
robert_jw 0:b2805b6888dc 893 switch (NETCONNTYPE_GROUP(msg->conn->type)) {
robert_jw 0:b2805b6888dc 894 #if LWIP_RAW
robert_jw 0:b2805b6888dc 895 case NETCONN_RAW:
robert_jw 0:b2805b6888dc 896 msg->err = raw_bind(msg->conn->pcb.raw, msg->msg.bc.ipaddr);
robert_jw 0:b2805b6888dc 897 break;
robert_jw 0:b2805b6888dc 898 #endif /* LWIP_RAW */
robert_jw 0:b2805b6888dc 899 #if LWIP_UDP
robert_jw 0:b2805b6888dc 900 case NETCONN_UDP:
robert_jw 0:b2805b6888dc 901 msg->err = udp_bind(msg->conn->pcb.udp, msg->msg.bc.ipaddr, msg->msg.bc.port);
robert_jw 0:b2805b6888dc 902 break;
robert_jw 0:b2805b6888dc 903 #endif /* LWIP_UDP */
robert_jw 0:b2805b6888dc 904 #if LWIP_TCP
robert_jw 0:b2805b6888dc 905 case NETCONN_TCP:
robert_jw 0:b2805b6888dc 906 msg->err = tcp_bind(msg->conn->pcb.tcp, msg->msg.bc.ipaddr, msg->msg.bc.port);
robert_jw 0:b2805b6888dc 907 break;
robert_jw 0:b2805b6888dc 908 #endif /* LWIP_TCP */
robert_jw 0:b2805b6888dc 909 default:
robert_jw 0:b2805b6888dc 910 break;
robert_jw 0:b2805b6888dc 911 }
robert_jw 0:b2805b6888dc 912 }
robert_jw 0:b2805b6888dc 913 }
robert_jw 0:b2805b6888dc 914 TCPIP_APIMSG_ACK(msg);
robert_jw 0:b2805b6888dc 915 }
robert_jw 0:b2805b6888dc 916
robert_jw 0:b2805b6888dc 917 #if LWIP_TCP
robert_jw 0:b2805b6888dc 918 /**
robert_jw 0:b2805b6888dc 919 * TCP callback function if a connection (opened by tcp_connect/do_connect) has
robert_jw 0:b2805b6888dc 920 * been established (or reset by the remote host).
robert_jw 0:b2805b6888dc 921 *
robert_jw 0:b2805b6888dc 922 * @see tcp.h (struct tcp_pcb.connected) for parameters and return values
robert_jw 0:b2805b6888dc 923 */
robert_jw 0:b2805b6888dc 924 static err_t
robert_jw 0:b2805b6888dc 925 do_connected(void *arg, struct tcp_pcb *pcb, err_t err)
robert_jw 0:b2805b6888dc 926 {
robert_jw 0:b2805b6888dc 927 struct netconn *conn;
robert_jw 0:b2805b6888dc 928 int was_blocking;
robert_jw 0:b2805b6888dc 929
robert_jw 0:b2805b6888dc 930 LWIP_UNUSED_ARG(pcb);
robert_jw 0:b2805b6888dc 931
robert_jw 0:b2805b6888dc 932 conn = (struct netconn *)arg;
robert_jw 0:b2805b6888dc 933
robert_jw 0:b2805b6888dc 934 if (conn == NULL) {
robert_jw 0:b2805b6888dc 935 return ERR_VAL;
robert_jw 0:b2805b6888dc 936 }
robert_jw 0:b2805b6888dc 937
robert_jw 0:b2805b6888dc 938 LWIP_ASSERT("conn->state == NETCONN_CONNECT", conn->state == NETCONN_CONNECT);
robert_jw 0:b2805b6888dc 939 LWIP_ASSERT("(conn->current_msg != NULL) || conn->in_non_blocking_connect",
robert_jw 0:b2805b6888dc 940 (conn->current_msg != NULL) || IN_NONBLOCKING_CONNECT(conn));
robert_jw 0:b2805b6888dc 941
robert_jw 0:b2805b6888dc 942 if (conn->current_msg != NULL) {
robert_jw 0:b2805b6888dc 943 conn->current_msg->err = err;
robert_jw 0:b2805b6888dc 944 }
robert_jw 0:b2805b6888dc 945 if ((conn->type == NETCONN_TCP) && (err == ERR_OK)) {
robert_jw 0:b2805b6888dc 946 setup_tcp(conn);
robert_jw 0:b2805b6888dc 947 }
robert_jw 0:b2805b6888dc 948 was_blocking = !IN_NONBLOCKING_CONNECT(conn);
robert_jw 0:b2805b6888dc 949 SET_NONBLOCKING_CONNECT(conn, 0);
robert_jw 0:b2805b6888dc 950 conn->current_msg = NULL;
robert_jw 0:b2805b6888dc 951 conn->state = NETCONN_NONE;
robert_jw 0:b2805b6888dc 952 if (!was_blocking) {
robert_jw 0:b2805b6888dc 953 NETCONN_SET_SAFE_ERR(conn, ERR_OK);
robert_jw 0:b2805b6888dc 954 }
robert_jw 0:b2805b6888dc 955 API_EVENT(conn, NETCONN_EVT_SENDPLUS, 0);
robert_jw 0:b2805b6888dc 956
robert_jw 0:b2805b6888dc 957 if (was_blocking) {
robert_jw 0:b2805b6888dc 958 sys_sem_signal(&conn->op_completed);
robert_jw 0:b2805b6888dc 959 }
robert_jw 0:b2805b6888dc 960 return ERR_OK;
robert_jw 0:b2805b6888dc 961 }
robert_jw 0:b2805b6888dc 962 #endif /* LWIP_TCP */
robert_jw 0:b2805b6888dc 963
robert_jw 0:b2805b6888dc 964 /**
robert_jw 0:b2805b6888dc 965 * Connect a pcb contained inside a netconn
robert_jw 0:b2805b6888dc 966 * Called from netconn_connect.
robert_jw 0:b2805b6888dc 967 *
robert_jw 0:b2805b6888dc 968 * @param msg the api_msg_msg pointing to the connection and containing
robert_jw 0:b2805b6888dc 969 * the IP address and port to connect to
robert_jw 0:b2805b6888dc 970 */
robert_jw 0:b2805b6888dc 971 void
robert_jw 0:b2805b6888dc 972 do_connect(struct api_msg_msg *msg)
robert_jw 0:b2805b6888dc 973 {
robert_jw 0:b2805b6888dc 974 if (msg->conn->pcb.tcp == NULL) {
robert_jw 0:b2805b6888dc 975 /* This may happen when calling netconn_connect() a second time */
robert_jw 0:b2805b6888dc 976 msg->err = ERR_CLSD;
robert_jw 0:b2805b6888dc 977 } else {
robert_jw 0:b2805b6888dc 978 switch (NETCONNTYPE_GROUP(msg->conn->type)) {
robert_jw 0:b2805b6888dc 979 #if LWIP_RAW
robert_jw 0:b2805b6888dc 980 case NETCONN_RAW:
robert_jw 0:b2805b6888dc 981 msg->err = raw_connect(msg->conn->pcb.raw, msg->msg.bc.ipaddr);
robert_jw 0:b2805b6888dc 982 break;
robert_jw 0:b2805b6888dc 983 #endif /* LWIP_RAW */
robert_jw 0:b2805b6888dc 984 #if LWIP_UDP
robert_jw 0:b2805b6888dc 985 case NETCONN_UDP:
robert_jw 0:b2805b6888dc 986 msg->err = udp_connect(msg->conn->pcb.udp, msg->msg.bc.ipaddr, msg->msg.bc.port);
robert_jw 0:b2805b6888dc 987 break;
robert_jw 0:b2805b6888dc 988 #endif /* LWIP_UDP */
robert_jw 0:b2805b6888dc 989 #if LWIP_TCP
robert_jw 0:b2805b6888dc 990 case NETCONN_TCP:
robert_jw 0:b2805b6888dc 991 /* Prevent connect while doing any other action. */
robert_jw 0:b2805b6888dc 992 if (msg->conn->state != NETCONN_NONE) {
robert_jw 0:b2805b6888dc 993 msg->err = ERR_ISCONN;
robert_jw 0:b2805b6888dc 994 } else {
robert_jw 0:b2805b6888dc 995 setup_tcp(msg->conn);
robert_jw 0:b2805b6888dc 996 msg->err = tcp_connect(msg->conn->pcb.tcp, msg->msg.bc.ipaddr,
robert_jw 0:b2805b6888dc 997 msg->msg.bc.port, do_connected);
robert_jw 0:b2805b6888dc 998 if (msg->err == ERR_OK) {
robert_jw 0:b2805b6888dc 999 u8_t non_blocking = netconn_is_nonblocking(msg->conn);
robert_jw 0:b2805b6888dc 1000 msg->conn->state = NETCONN_CONNECT;
robert_jw 0:b2805b6888dc 1001 SET_NONBLOCKING_CONNECT(msg->conn, non_blocking);
robert_jw 0:b2805b6888dc 1002 if (non_blocking) {
robert_jw 0:b2805b6888dc 1003 msg->err = ERR_INPROGRESS;
robert_jw 0:b2805b6888dc 1004 } else {
robert_jw 0:b2805b6888dc 1005 msg->conn->current_msg = msg;
robert_jw 0:b2805b6888dc 1006 /* sys_sem_signal() is called from do_connected (or err_tcp()),
robert_jw 0:b2805b6888dc 1007 * when the connection is established! */
robert_jw 0:b2805b6888dc 1008 return;
robert_jw 0:b2805b6888dc 1009 }
robert_jw 0:b2805b6888dc 1010 }
robert_jw 0:b2805b6888dc 1011 }
robert_jw 0:b2805b6888dc 1012 break;
robert_jw 0:b2805b6888dc 1013 #endif /* LWIP_TCP */
robert_jw 0:b2805b6888dc 1014 default:
robert_jw 0:b2805b6888dc 1015 LWIP_ERROR("Invalid netconn type", 0, do{ msg->err = ERR_VAL; }while(0));
robert_jw 0:b2805b6888dc 1016 break;
robert_jw 0:b2805b6888dc 1017 }
robert_jw 0:b2805b6888dc 1018 }
robert_jw 0:b2805b6888dc 1019 sys_sem_signal(&msg->conn->op_completed);
robert_jw 0:b2805b6888dc 1020 }
robert_jw 0:b2805b6888dc 1021
robert_jw 0:b2805b6888dc 1022 /**
robert_jw 0:b2805b6888dc 1023 * Connect a pcb contained inside a netconn
robert_jw 0:b2805b6888dc 1024 * Only used for UDP netconns.
robert_jw 0:b2805b6888dc 1025 * Called from netconn_disconnect.
robert_jw 0:b2805b6888dc 1026 *
robert_jw 0:b2805b6888dc 1027 * @param msg the api_msg_msg pointing to the connection to disconnect
robert_jw 0:b2805b6888dc 1028 */
robert_jw 0:b2805b6888dc 1029 void
robert_jw 0:b2805b6888dc 1030 do_disconnect(struct api_msg_msg *msg)
robert_jw 0:b2805b6888dc 1031 {
robert_jw 0:b2805b6888dc 1032 #if LWIP_UDP
robert_jw 0:b2805b6888dc 1033 if (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_UDP) {
robert_jw 0:b2805b6888dc 1034 udp_disconnect(msg->conn->pcb.udp);
robert_jw 0:b2805b6888dc 1035 msg->err = ERR_OK;
robert_jw 0:b2805b6888dc 1036 } else
robert_jw 0:b2805b6888dc 1037 #endif /* LWIP_UDP */
robert_jw 0:b2805b6888dc 1038 {
robert_jw 0:b2805b6888dc 1039 msg->err = ERR_VAL;
robert_jw 0:b2805b6888dc 1040 }
robert_jw 0:b2805b6888dc 1041 TCPIP_APIMSG_ACK(msg);
robert_jw 0:b2805b6888dc 1042 }
robert_jw 0:b2805b6888dc 1043
robert_jw 0:b2805b6888dc 1044 #if LWIP_TCP
robert_jw 0:b2805b6888dc 1045 /**
robert_jw 0:b2805b6888dc 1046 * Set a TCP pcb contained in a netconn into listen mode
robert_jw 0:b2805b6888dc 1047 * Called from netconn_listen.
robert_jw 0:b2805b6888dc 1048 *
robert_jw 0:b2805b6888dc 1049 * @param msg the api_msg_msg pointing to the connection
robert_jw 0:b2805b6888dc 1050 */
robert_jw 0:b2805b6888dc 1051 void
robert_jw 0:b2805b6888dc 1052 do_listen(struct api_msg_msg *msg)
robert_jw 0:b2805b6888dc 1053 {
robert_jw 0:b2805b6888dc 1054 if (ERR_IS_FATAL(msg->conn->last_err)) {
robert_jw 0:b2805b6888dc 1055 msg->err = msg->conn->last_err;
robert_jw 0:b2805b6888dc 1056 } else {
robert_jw 0:b2805b6888dc 1057 msg->err = ERR_CONN;
robert_jw 0:b2805b6888dc 1058 if (msg->conn->pcb.tcp != NULL) {
robert_jw 0:b2805b6888dc 1059 if (msg->conn->type == NETCONN_TCP) {
robert_jw 0:b2805b6888dc 1060 if (msg->conn->state == NETCONN_NONE) {
robert_jw 0:b2805b6888dc 1061 #if TCP_LISTEN_BACKLOG
robert_jw 0:b2805b6888dc 1062 struct tcp_pcb* lpcb = tcp_listen_with_backlog(msg->conn->pcb.tcp, msg->msg.lb.backlog);
robert_jw 0:b2805b6888dc 1063 #else /* TCP_LISTEN_BACKLOG */
robert_jw 0:b2805b6888dc 1064 struct tcp_pcb* lpcb = tcp_listen(msg->conn->pcb.tcp);
robert_jw 0:b2805b6888dc 1065 #endif /* TCP_LISTEN_BACKLOG */
robert_jw 0:b2805b6888dc 1066 if (lpcb == NULL) {
robert_jw 0:b2805b6888dc 1067 /* in this case, the old pcb is still allocated */
robert_jw 0:b2805b6888dc 1068 msg->err = ERR_MEM;
robert_jw 0:b2805b6888dc 1069 } else {
robert_jw 0:b2805b6888dc 1070 /* delete the recvmbox and allocate the acceptmbox */
robert_jw 0:b2805b6888dc 1071 if (sys_mbox_valid(&msg->conn->recvmbox)) {
robert_jw 0:b2805b6888dc 1072 /** @todo: should we drain the recvmbox here? */
robert_jw 0:b2805b6888dc 1073 sys_mbox_free(&msg->conn->recvmbox);
robert_jw 0:b2805b6888dc 1074 sys_mbox_set_invalid(&msg->conn->recvmbox);
robert_jw 0:b2805b6888dc 1075 }
robert_jw 0:b2805b6888dc 1076 msg->err = ERR_OK;
robert_jw 0:b2805b6888dc 1077 if (!sys_mbox_valid(&msg->conn->acceptmbox)) {
robert_jw 0:b2805b6888dc 1078 msg->err = sys_mbox_new(&msg->conn->acceptmbox, DEFAULT_ACCEPTMBOX_SIZE);
robert_jw 0:b2805b6888dc 1079 }
robert_jw 0:b2805b6888dc 1080 if (msg->err == ERR_OK) {
robert_jw 0:b2805b6888dc 1081 msg->conn->state = NETCONN_LISTEN;
robert_jw 0:b2805b6888dc 1082 msg->conn->pcb.tcp = lpcb;
robert_jw 0:b2805b6888dc 1083 tcp_arg(msg->conn->pcb.tcp, msg->conn);
robert_jw 0:b2805b6888dc 1084 tcp_accept(msg->conn->pcb.tcp, accept_function);
robert_jw 0:b2805b6888dc 1085 } else {
robert_jw 0:b2805b6888dc 1086 /* since the old pcb is already deallocated, free lpcb now */
robert_jw 0:b2805b6888dc 1087 tcp_close(lpcb);
robert_jw 0:b2805b6888dc 1088 msg->conn->pcb.tcp = NULL;
robert_jw 0:b2805b6888dc 1089 }
robert_jw 0:b2805b6888dc 1090 }
robert_jw 0:b2805b6888dc 1091 }
robert_jw 0:b2805b6888dc 1092 }
robert_jw 0:b2805b6888dc 1093 }
robert_jw 0:b2805b6888dc 1094 }
robert_jw 0:b2805b6888dc 1095 TCPIP_APIMSG_ACK(msg);
robert_jw 0:b2805b6888dc 1096 }
robert_jw 0:b2805b6888dc 1097 #endif /* LWIP_TCP */
robert_jw 0:b2805b6888dc 1098
robert_jw 0:b2805b6888dc 1099 /**
robert_jw 0:b2805b6888dc 1100 * Send some data on a RAW or UDP pcb contained in a netconn
robert_jw 0:b2805b6888dc 1101 * Called from netconn_send
robert_jw 0:b2805b6888dc 1102 *
robert_jw 0:b2805b6888dc 1103 * @param msg the api_msg_msg pointing to the connection
robert_jw 0:b2805b6888dc 1104 */
robert_jw 0:b2805b6888dc 1105 void
robert_jw 0:b2805b6888dc 1106 do_send(struct api_msg_msg *msg)
robert_jw 0:b2805b6888dc 1107 {
robert_jw 0:b2805b6888dc 1108 if (ERR_IS_FATAL(msg->conn->last_err)) {
robert_jw 0:b2805b6888dc 1109 msg->err = msg->conn->last_err;
robert_jw 0:b2805b6888dc 1110 } else {
robert_jw 0:b2805b6888dc 1111 msg->err = ERR_CONN;
robert_jw 0:b2805b6888dc 1112 if (msg->conn->pcb.tcp != NULL) {
robert_jw 0:b2805b6888dc 1113 switch (NETCONNTYPE_GROUP(msg->conn->type)) {
robert_jw 0:b2805b6888dc 1114 #if LWIP_RAW
robert_jw 0:b2805b6888dc 1115 case NETCONN_RAW:
robert_jw 0:b2805b6888dc 1116 if (ip_addr_isany(&msg->msg.b->addr)) {
robert_jw 0:b2805b6888dc 1117 msg->err = raw_send(msg->conn->pcb.raw, msg->msg.b->p);
robert_jw 0:b2805b6888dc 1118 } else {
robert_jw 0:b2805b6888dc 1119 msg->err = raw_sendto(msg->conn->pcb.raw, msg->msg.b->p, &msg->msg.b->addr);
robert_jw 0:b2805b6888dc 1120 }
robert_jw 0:b2805b6888dc 1121 break;
robert_jw 0:b2805b6888dc 1122 #endif
robert_jw 0:b2805b6888dc 1123 #if LWIP_UDP
robert_jw 0:b2805b6888dc 1124 case NETCONN_UDP:
robert_jw 0:b2805b6888dc 1125 #if LWIP_CHECKSUM_ON_COPY
robert_jw 0:b2805b6888dc 1126 if (ip_addr_isany(&msg->msg.b->addr)) {
robert_jw 0:b2805b6888dc 1127 msg->err = udp_send_chksum(msg->conn->pcb.udp, msg->msg.b->p,
robert_jw 0:b2805b6888dc 1128 msg->msg.b->flags & NETBUF_FLAG_CHKSUM, msg->msg.b->toport_chksum);
robert_jw 0:b2805b6888dc 1129 } else {
robert_jw 0:b2805b6888dc 1130 msg->err = udp_sendto_chksum(msg->conn->pcb.udp, msg->msg.b->p,
robert_jw 0:b2805b6888dc 1131 &msg->msg.b->addr, msg->msg.b->port,
robert_jw 0:b2805b6888dc 1132 msg->msg.b->flags & NETBUF_FLAG_CHKSUM, msg->msg.b->toport_chksum);
robert_jw 0:b2805b6888dc 1133 }
robert_jw 0:b2805b6888dc 1134 #else /* LWIP_CHECKSUM_ON_COPY */
robert_jw 0:b2805b6888dc 1135 if (ip_addr_isany(&msg->msg.b->addr)) {
robert_jw 0:b2805b6888dc 1136 msg->err = udp_send(msg->conn->pcb.udp, msg->msg.b->p);
robert_jw 0:b2805b6888dc 1137 } else {
robert_jw 0:b2805b6888dc 1138 msg->err = udp_sendto(msg->conn->pcb.udp, msg->msg.b->p, &msg->msg.b->addr, msg->msg.b->port);
robert_jw 0:b2805b6888dc 1139 }
robert_jw 0:b2805b6888dc 1140 #endif /* LWIP_CHECKSUM_ON_COPY */
robert_jw 0:b2805b6888dc 1141 break;
robert_jw 0:b2805b6888dc 1142 #endif /* LWIP_UDP */
robert_jw 0:b2805b6888dc 1143 default:
robert_jw 0:b2805b6888dc 1144 break;
robert_jw 0:b2805b6888dc 1145 }
robert_jw 0:b2805b6888dc 1146 }
robert_jw 0:b2805b6888dc 1147 }
robert_jw 0:b2805b6888dc 1148 TCPIP_APIMSG_ACK(msg);
robert_jw 0:b2805b6888dc 1149 }
robert_jw 0:b2805b6888dc 1150
robert_jw 0:b2805b6888dc 1151 #if LWIP_TCP
robert_jw 0:b2805b6888dc 1152 /**
robert_jw 0:b2805b6888dc 1153 * Indicate data has been received from a TCP pcb contained in a netconn
robert_jw 0:b2805b6888dc 1154 * Called from netconn_recv
robert_jw 0:b2805b6888dc 1155 *
robert_jw 0:b2805b6888dc 1156 * @param msg the api_msg_msg pointing to the connection
robert_jw 0:b2805b6888dc 1157 */
robert_jw 0:b2805b6888dc 1158 void
robert_jw 0:b2805b6888dc 1159 do_recv(struct api_msg_msg *msg)
robert_jw 0:b2805b6888dc 1160 {
robert_jw 0:b2805b6888dc 1161 msg->err = ERR_OK;
robert_jw 0:b2805b6888dc 1162 if (msg->conn->pcb.tcp != NULL) {
robert_jw 0:b2805b6888dc 1163 if (msg->conn->type == NETCONN_TCP) {
robert_jw 0:b2805b6888dc 1164 #if TCP_LISTEN_BACKLOG
robert_jw 0:b2805b6888dc 1165 if (msg->conn->pcb.tcp->state == LISTEN) {
robert_jw 0:b2805b6888dc 1166 tcp_accepted(msg->conn->pcb.tcp);
robert_jw 0:b2805b6888dc 1167 } else
robert_jw 0:b2805b6888dc 1168 #endif /* TCP_LISTEN_BACKLOG */
robert_jw 0:b2805b6888dc 1169 {
robert_jw 0:b2805b6888dc 1170 u32_t remaining = msg->msg.r.len;
robert_jw 0:b2805b6888dc 1171 do {
robert_jw 0:b2805b6888dc 1172 u16_t recved = (remaining > 0xffff) ? 0xffff : (u16_t)remaining;
robert_jw 0:b2805b6888dc 1173 tcp_recved(msg->conn->pcb.tcp, recved);
robert_jw 0:b2805b6888dc 1174 remaining -= recved;
robert_jw 0:b2805b6888dc 1175 }while(remaining != 0);
robert_jw 0:b2805b6888dc 1176 }
robert_jw 0:b2805b6888dc 1177 }
robert_jw 0:b2805b6888dc 1178 }
robert_jw 0:b2805b6888dc 1179 TCPIP_APIMSG_ACK(msg);
robert_jw 0:b2805b6888dc 1180 }
robert_jw 0:b2805b6888dc 1181
robert_jw 0:b2805b6888dc 1182 /**
robert_jw 0:b2805b6888dc 1183 * See if more data needs to be written from a previous call to netconn_write.
robert_jw 0:b2805b6888dc 1184 * Called initially from do_write. If the first call can't send all data
robert_jw 0:b2805b6888dc 1185 * (because of low memory or empty send-buffer), this function is called again
robert_jw 0:b2805b6888dc 1186 * from sent_tcp() or poll_tcp() to send more data. If all data is sent, the
robert_jw 0:b2805b6888dc 1187 * blocking application thread (waiting in netconn_write) is released.
robert_jw 0:b2805b6888dc 1188 *
robert_jw 0:b2805b6888dc 1189 * @param conn netconn (that is currently in state NETCONN_WRITE) to process
robert_jw 0:b2805b6888dc 1190 * @return ERR_OK
robert_jw 0:b2805b6888dc 1191 * ERR_MEM if LWIP_TCPIP_CORE_LOCKING=1 and sending hasn't yet finished
robert_jw 0:b2805b6888dc 1192 */
robert_jw 0:b2805b6888dc 1193 static err_t
robert_jw 0:b2805b6888dc 1194 do_writemore(struct netconn *conn)
robert_jw 0:b2805b6888dc 1195 {
robert_jw 0:b2805b6888dc 1196 err_t err = ERR_OK;
robert_jw 0:b2805b6888dc 1197 void *dataptr;
robert_jw 0:b2805b6888dc 1198 u16_t len, available;
robert_jw 0:b2805b6888dc 1199 u8_t write_finished = 0;
robert_jw 0:b2805b6888dc 1200 size_t diff;
robert_jw 0:b2805b6888dc 1201 u8_t dontblock = netconn_is_nonblocking(conn) ||
robert_jw 0:b2805b6888dc 1202 (conn->current_msg->msg.w.apiflags & NETCONN_DONTBLOCK);
robert_jw 0:b2805b6888dc 1203 u8_t apiflags = conn->current_msg->msg.w.apiflags;
robert_jw 0:b2805b6888dc 1204
robert_jw 0:b2805b6888dc 1205 LWIP_ASSERT("conn != NULL", conn != NULL);
robert_jw 0:b2805b6888dc 1206 LWIP_ASSERT("conn->state == NETCONN_WRITE", (conn->state == NETCONN_WRITE));
robert_jw 0:b2805b6888dc 1207 LWIP_ASSERT("conn->current_msg != NULL", conn->current_msg != NULL);
robert_jw 0:b2805b6888dc 1208 LWIP_ASSERT("conn->pcb.tcp != NULL", conn->pcb.tcp != NULL);
robert_jw 0:b2805b6888dc 1209 LWIP_ASSERT("conn->write_offset < conn->current_msg->msg.w.len",
robert_jw 0:b2805b6888dc 1210 conn->write_offset < conn->current_msg->msg.w.len);
robert_jw 0:b2805b6888dc 1211
robert_jw 0:b2805b6888dc 1212 dataptr = (u8_t*)conn->current_msg->msg.w.dataptr + conn->write_offset;
robert_jw 0:b2805b6888dc 1213 diff = conn->current_msg->msg.w.len - conn->write_offset;
robert_jw 0:b2805b6888dc 1214 if (diff > 0xffffUL) { /* max_u16_t */
robert_jw 0:b2805b6888dc 1215 len = 0xffff;
robert_jw 0:b2805b6888dc 1216 #if LWIP_TCPIP_CORE_LOCKING
robert_jw 0:b2805b6888dc 1217 conn->flags |= NETCONN_FLAG_WRITE_DELAYED;
robert_jw 0:b2805b6888dc 1218 #endif
robert_jw 0:b2805b6888dc 1219 apiflags |= TCP_WRITE_FLAG_MORE;
robert_jw 0:b2805b6888dc 1220 } else {
robert_jw 0:b2805b6888dc 1221 len = (u16_t)diff;
robert_jw 0:b2805b6888dc 1222 }
robert_jw 0:b2805b6888dc 1223 available = tcp_sndbuf(conn->pcb.tcp);
robert_jw 0:b2805b6888dc 1224 if (available < len) {
robert_jw 0:b2805b6888dc 1225 /* don't try to write more than sendbuf */
robert_jw 0:b2805b6888dc 1226 len = available;
robert_jw 0:b2805b6888dc 1227 #if LWIP_TCPIP_CORE_LOCKING
robert_jw 0:b2805b6888dc 1228 conn->flags |= NETCONN_FLAG_WRITE_DELAYED;
robert_jw 0:b2805b6888dc 1229 #endif
robert_jw 0:b2805b6888dc 1230 apiflags |= TCP_WRITE_FLAG_MORE;
robert_jw 0:b2805b6888dc 1231 }
robert_jw 0:b2805b6888dc 1232 if (dontblock && (len < conn->current_msg->msg.w.len)) {
robert_jw 0:b2805b6888dc 1233 /* failed to send all data at once -> nonblocking write not possible */
robert_jw 0:b2805b6888dc 1234 err = ERR_MEM;
robert_jw 0:b2805b6888dc 1235 }
robert_jw 0:b2805b6888dc 1236 if (err == ERR_OK) {
robert_jw 0:b2805b6888dc 1237 LWIP_ASSERT("do_writemore: invalid length!", ((conn->write_offset + len) <= conn->current_msg->msg.w.len));
robert_jw 0:b2805b6888dc 1238 err = tcp_write(conn->pcb.tcp, dataptr, len, apiflags);
robert_jw 0:b2805b6888dc 1239 }
robert_jw 0:b2805b6888dc 1240 if (dontblock && (err == ERR_MEM)) {
robert_jw 0:b2805b6888dc 1241 /* nonblocking write failed */
robert_jw 0:b2805b6888dc 1242 write_finished = 1;
robert_jw 0:b2805b6888dc 1243 err = ERR_WOULDBLOCK;
robert_jw 0:b2805b6888dc 1244 /* let poll_tcp check writable space to mark the pcb
robert_jw 0:b2805b6888dc 1245 writable again */
robert_jw 0:b2805b6888dc 1246 conn->flags |= NETCONN_FLAG_CHECK_WRITESPACE;
robert_jw 0:b2805b6888dc 1247 /* let select mark this pcb as non-writable. */
robert_jw 0:b2805b6888dc 1248 API_EVENT(conn, NETCONN_EVT_SENDMINUS, len);
robert_jw 0:b2805b6888dc 1249 } else {
robert_jw 0:b2805b6888dc 1250 /* if OK or memory error, check available space */
robert_jw 0:b2805b6888dc 1251 if (((err == ERR_OK) || (err == ERR_MEM)) &&
robert_jw 0:b2805b6888dc 1252 ((tcp_sndbuf(conn->pcb.tcp) <= TCP_SNDLOWAT) ||
robert_jw 0:b2805b6888dc 1253 (tcp_sndqueuelen(conn->pcb.tcp) >= TCP_SNDQUEUELOWAT))) {
robert_jw 0:b2805b6888dc 1254 /* The queued byte- or pbuf-count exceeds the configured low-water limit,
robert_jw 0:b2805b6888dc 1255 let select mark this pcb as non-writable. */
robert_jw 0:b2805b6888dc 1256 API_EVENT(conn, NETCONN_EVT_SENDMINUS, len);
robert_jw 0:b2805b6888dc 1257 }
robert_jw 0:b2805b6888dc 1258
robert_jw 0:b2805b6888dc 1259 if (err == ERR_OK) {
robert_jw 0:b2805b6888dc 1260 conn->write_offset += len;
robert_jw 0:b2805b6888dc 1261 if (conn->write_offset == conn->current_msg->msg.w.len) {
robert_jw 0:b2805b6888dc 1262 /* everything was written */
robert_jw 0:b2805b6888dc 1263 write_finished = 1;
robert_jw 0:b2805b6888dc 1264 conn->write_offset = 0;
robert_jw 0:b2805b6888dc 1265 }
robert_jw 0:b2805b6888dc 1266 tcp_output(conn->pcb.tcp);
robert_jw 0:b2805b6888dc 1267 } else if (err == ERR_MEM) {
robert_jw 0:b2805b6888dc 1268 /* If ERR_MEM, we wait for sent_tcp or poll_tcp to be called
robert_jw 0:b2805b6888dc 1269 we do NOT return to the application thread, since ERR_MEM is
robert_jw 0:b2805b6888dc 1270 only a temporary error! */
robert_jw 0:b2805b6888dc 1271
robert_jw 0:b2805b6888dc 1272 /* tcp_write returned ERR_MEM, try tcp_output anyway */
robert_jw 0:b2805b6888dc 1273 tcp_output(conn->pcb.tcp);
robert_jw 0:b2805b6888dc 1274
robert_jw 0:b2805b6888dc 1275 #if LWIP_TCPIP_CORE_LOCKING
robert_jw 0:b2805b6888dc 1276 conn->flags |= NETCONN_FLAG_WRITE_DELAYED;
robert_jw 0:b2805b6888dc 1277 #endif
robert_jw 0:b2805b6888dc 1278 } else {
robert_jw 0:b2805b6888dc 1279 /* On errors != ERR_MEM, we don't try writing any more but return
robert_jw 0:b2805b6888dc 1280 the error to the application thread. */
robert_jw 0:b2805b6888dc 1281 write_finished = 1;
robert_jw 0:b2805b6888dc 1282 }
robert_jw 0:b2805b6888dc 1283 }
robert_jw 0:b2805b6888dc 1284
robert_jw 0:b2805b6888dc 1285 if (write_finished) {
robert_jw 0:b2805b6888dc 1286 /* everything was written: set back connection state
robert_jw 0:b2805b6888dc 1287 and back to application task */
robert_jw 0:b2805b6888dc 1288 conn->current_msg->err = err;
robert_jw 0:b2805b6888dc 1289 conn->current_msg = NULL;
robert_jw 0:b2805b6888dc 1290 conn->state = NETCONN_NONE;
robert_jw 0:b2805b6888dc 1291 #if LWIP_TCPIP_CORE_LOCKING
robert_jw 0:b2805b6888dc 1292 if ((conn->flags & NETCONN_FLAG_WRITE_DELAYED) != 0)
robert_jw 0:b2805b6888dc 1293 #endif
robert_jw 0:b2805b6888dc 1294 {
robert_jw 0:b2805b6888dc 1295 sys_sem_signal(&conn->op_completed);
robert_jw 0:b2805b6888dc 1296 }
robert_jw 0:b2805b6888dc 1297 }
robert_jw 0:b2805b6888dc 1298 #if LWIP_TCPIP_CORE_LOCKING
robert_jw 0:b2805b6888dc 1299 else
robert_jw 0:b2805b6888dc 1300 return ERR_MEM;
robert_jw 0:b2805b6888dc 1301 #endif
robert_jw 0:b2805b6888dc 1302 return ERR_OK;
robert_jw 0:b2805b6888dc 1303 }
robert_jw 0:b2805b6888dc 1304 #endif /* LWIP_TCP */
robert_jw 0:b2805b6888dc 1305
robert_jw 0:b2805b6888dc 1306 /**
robert_jw 0:b2805b6888dc 1307 * Send some data on a TCP pcb contained in a netconn
robert_jw 0:b2805b6888dc 1308 * Called from netconn_write
robert_jw 0:b2805b6888dc 1309 *
robert_jw 0:b2805b6888dc 1310 * @param msg the api_msg_msg pointing to the connection
robert_jw 0:b2805b6888dc 1311 */
robert_jw 0:b2805b6888dc 1312 void
robert_jw 0:b2805b6888dc 1313 do_write(struct api_msg_msg *msg)
robert_jw 0:b2805b6888dc 1314 {
robert_jw 0:b2805b6888dc 1315 if (ERR_IS_FATAL(msg->conn->last_err)) {
robert_jw 0:b2805b6888dc 1316 msg->err = msg->conn->last_err;
robert_jw 0:b2805b6888dc 1317 } else {
robert_jw 0:b2805b6888dc 1318 if (msg->conn->type == NETCONN_TCP) {
robert_jw 0:b2805b6888dc 1319 #if LWIP_TCP
robert_jw 0:b2805b6888dc 1320 if (msg->conn->state != NETCONN_NONE) {
robert_jw 0:b2805b6888dc 1321 /* netconn is connecting, closing or in blocking write */
robert_jw 0:b2805b6888dc 1322 msg->err = ERR_INPROGRESS;
robert_jw 0:b2805b6888dc 1323 } else if (msg->conn->pcb.tcp != NULL) {
robert_jw 0:b2805b6888dc 1324 msg->conn->state = NETCONN_WRITE;
robert_jw 0:b2805b6888dc 1325 /* set all the variables used by do_writemore */
robert_jw 0:b2805b6888dc 1326 LWIP_ASSERT("already writing or closing", msg->conn->current_msg == NULL &&
robert_jw 0:b2805b6888dc 1327 msg->conn->write_offset == 0);
robert_jw 0:b2805b6888dc 1328 LWIP_ASSERT("msg->msg.w.len != 0", msg->msg.w.len != 0);
robert_jw 0:b2805b6888dc 1329 msg->conn->current_msg = msg;
robert_jw 0:b2805b6888dc 1330 msg->conn->write_offset = 0;
robert_jw 0:b2805b6888dc 1331 #if LWIP_TCPIP_CORE_LOCKING
robert_jw 0:b2805b6888dc 1332 msg->conn->flags &= ~NETCONN_FLAG_WRITE_DELAYED;
robert_jw 0:b2805b6888dc 1333 if (do_writemore(msg->conn) != ERR_OK) {
robert_jw 0:b2805b6888dc 1334 LWIP_ASSERT("state!", msg->conn->state == NETCONN_WRITE);
robert_jw 0:b2805b6888dc 1335 UNLOCK_TCPIP_CORE();
robert_jw 0:b2805b6888dc 1336 sys_arch_sem_wait(&msg->conn->op_completed, 0);
robert_jw 0:b2805b6888dc 1337 LOCK_TCPIP_CORE();
robert_jw 0:b2805b6888dc 1338 LWIP_ASSERT("state!", msg->conn->state == NETCONN_NONE);
robert_jw 0:b2805b6888dc 1339 }
robert_jw 0:b2805b6888dc 1340 #else /* LWIP_TCPIP_CORE_LOCKING */
robert_jw 0:b2805b6888dc 1341 do_writemore(msg->conn);
robert_jw 0:b2805b6888dc 1342 #endif /* LWIP_TCPIP_CORE_LOCKING */
robert_jw 0:b2805b6888dc 1343 /* for both cases: if do_writemore was called, don't ACK the APIMSG
robert_jw 0:b2805b6888dc 1344 since do_writemore ACKs it! */
robert_jw 0:b2805b6888dc 1345 return;
robert_jw 0:b2805b6888dc 1346 } else {
robert_jw 0:b2805b6888dc 1347 msg->err = ERR_CONN;
robert_jw 0:b2805b6888dc 1348 }
robert_jw 0:b2805b6888dc 1349 #else /* LWIP_TCP */
robert_jw 0:b2805b6888dc 1350 msg->err = ERR_VAL;
robert_jw 0:b2805b6888dc 1351 #endif /* LWIP_TCP */
robert_jw 0:b2805b6888dc 1352 #if (LWIP_UDP || LWIP_RAW)
robert_jw 0:b2805b6888dc 1353 } else {
robert_jw 0:b2805b6888dc 1354 msg->err = ERR_VAL;
robert_jw 0:b2805b6888dc 1355 #endif /* (LWIP_UDP || LWIP_RAW) */
robert_jw 0:b2805b6888dc 1356 }
robert_jw 0:b2805b6888dc 1357 }
robert_jw 0:b2805b6888dc 1358 TCPIP_APIMSG_ACK(msg);
robert_jw 0:b2805b6888dc 1359 }
robert_jw 0:b2805b6888dc 1360
robert_jw 0:b2805b6888dc 1361 /**
robert_jw 0:b2805b6888dc 1362 * Return a connection's local or remote address
robert_jw 0:b2805b6888dc 1363 * Called from netconn_getaddr
robert_jw 0:b2805b6888dc 1364 *
robert_jw 0:b2805b6888dc 1365 * @param msg the api_msg_msg pointing to the connection
robert_jw 0:b2805b6888dc 1366 */
robert_jw 0:b2805b6888dc 1367 void
robert_jw 0:b2805b6888dc 1368 do_getaddr(struct api_msg_msg *msg)
robert_jw 0:b2805b6888dc 1369 {
robert_jw 0:b2805b6888dc 1370 if (msg->conn->pcb.ip != NULL) {
robert_jw 0:b2805b6888dc 1371 *(msg->msg.ad.ipaddr) = (msg->msg.ad.local ? msg->conn->pcb.ip->local_ip :
robert_jw 0:b2805b6888dc 1372 msg->conn->pcb.ip->remote_ip);
robert_jw 0:b2805b6888dc 1373
robert_jw 0:b2805b6888dc 1374 msg->err = ERR_OK;
robert_jw 0:b2805b6888dc 1375 switch (NETCONNTYPE_GROUP(msg->conn->type)) {
robert_jw 0:b2805b6888dc 1376 #if LWIP_RAW
robert_jw 0:b2805b6888dc 1377 case NETCONN_RAW:
robert_jw 0:b2805b6888dc 1378 if (msg->msg.ad.local) {
robert_jw 0:b2805b6888dc 1379 *(msg->msg.ad.port) = msg->conn->pcb.raw->protocol;
robert_jw 0:b2805b6888dc 1380 } else {
robert_jw 0:b2805b6888dc 1381 /* return an error as connecting is only a helper for upper layers */
robert_jw 0:b2805b6888dc 1382 msg->err = ERR_CONN;
robert_jw 0:b2805b6888dc 1383 }
robert_jw 0:b2805b6888dc 1384 break;
robert_jw 0:b2805b6888dc 1385 #endif /* LWIP_RAW */
robert_jw 0:b2805b6888dc 1386 #if LWIP_UDP
robert_jw 0:b2805b6888dc 1387 case NETCONN_UDP:
robert_jw 0:b2805b6888dc 1388 if (msg->msg.ad.local) {
robert_jw 0:b2805b6888dc 1389 *(msg->msg.ad.port) = msg->conn->pcb.udp->local_port;
robert_jw 0:b2805b6888dc 1390 } else {
robert_jw 0:b2805b6888dc 1391 if ((msg->conn->pcb.udp->flags & UDP_FLAGS_CONNECTED) == 0) {
robert_jw 0:b2805b6888dc 1392 msg->err = ERR_CONN;
robert_jw 0:b2805b6888dc 1393 } else {
robert_jw 0:b2805b6888dc 1394 *(msg->msg.ad.port) = msg->conn->pcb.udp->remote_port;
robert_jw 0:b2805b6888dc 1395 }
robert_jw 0:b2805b6888dc 1396 }
robert_jw 0:b2805b6888dc 1397 break;
robert_jw 0:b2805b6888dc 1398 #endif /* LWIP_UDP */
robert_jw 0:b2805b6888dc 1399 #if LWIP_TCP
robert_jw 0:b2805b6888dc 1400 case NETCONN_TCP:
robert_jw 0:b2805b6888dc 1401 *(msg->msg.ad.port) = (msg->msg.ad.local?msg->conn->pcb.tcp->local_port:msg->conn->pcb.tcp->remote_port);
robert_jw 0:b2805b6888dc 1402 break;
robert_jw 0:b2805b6888dc 1403 #endif /* LWIP_TCP */
robert_jw 0:b2805b6888dc 1404 default:
robert_jw 0:b2805b6888dc 1405 LWIP_ASSERT("invalid netconn_type", 0);
robert_jw 0:b2805b6888dc 1406 break;
robert_jw 0:b2805b6888dc 1407 }
robert_jw 0:b2805b6888dc 1408 } else {
robert_jw 0:b2805b6888dc 1409 msg->err = ERR_CONN;
robert_jw 0:b2805b6888dc 1410 }
robert_jw 0:b2805b6888dc 1411 TCPIP_APIMSG_ACK(msg);
robert_jw 0:b2805b6888dc 1412 }
robert_jw 0:b2805b6888dc 1413
robert_jw 0:b2805b6888dc 1414 /**
robert_jw 0:b2805b6888dc 1415 * Close a TCP pcb contained in a netconn
robert_jw 0:b2805b6888dc 1416 * Called from netconn_close
robert_jw 0:b2805b6888dc 1417 *
robert_jw 0:b2805b6888dc 1418 * @param msg the api_msg_msg pointing to the connection
robert_jw 0:b2805b6888dc 1419 */
robert_jw 0:b2805b6888dc 1420 void
robert_jw 0:b2805b6888dc 1421 do_close(struct api_msg_msg *msg)
robert_jw 0:b2805b6888dc 1422 {
robert_jw 0:b2805b6888dc 1423 #if LWIP_TCP
robert_jw 0:b2805b6888dc 1424 /* @todo: abort running write/connect? */
robert_jw 0:b2805b6888dc 1425 if ((msg->conn->state != NETCONN_NONE) && (msg->conn->state != NETCONN_LISTEN)) {
robert_jw 0:b2805b6888dc 1426 /* this only happens for TCP netconns */
robert_jw 0:b2805b6888dc 1427 LWIP_ASSERT("msg->conn->type == NETCONN_TCP", msg->conn->type == NETCONN_TCP);
robert_jw 0:b2805b6888dc 1428 msg->err = ERR_INPROGRESS;
robert_jw 0:b2805b6888dc 1429 } else if ((msg->conn->pcb.tcp != NULL) && (msg->conn->type == NETCONN_TCP)) {
robert_jw 0:b2805b6888dc 1430 if ((msg->msg.sd.shut != NETCONN_SHUT_RDWR) && (msg->conn->state == NETCONN_LISTEN)) {
robert_jw 0:b2805b6888dc 1431 /* LISTEN doesn't support half shutdown */
robert_jw 0:b2805b6888dc 1432 msg->err = ERR_CONN;
robert_jw 0:b2805b6888dc 1433 } else {
robert_jw 0:b2805b6888dc 1434 if (msg->msg.sd.shut & NETCONN_SHUT_RD) {
robert_jw 0:b2805b6888dc 1435 /* Drain and delete mboxes */
robert_jw 0:b2805b6888dc 1436 netconn_drain(msg->conn);
robert_jw 0:b2805b6888dc 1437 }
robert_jw 0:b2805b6888dc 1438 LWIP_ASSERT("already writing or closing", msg->conn->current_msg == NULL &&
robert_jw 0:b2805b6888dc 1439 msg->conn->write_offset == 0);
robert_jw 0:b2805b6888dc 1440 msg->conn->state = NETCONN_CLOSE;
robert_jw 0:b2805b6888dc 1441 msg->conn->current_msg = msg;
robert_jw 0:b2805b6888dc 1442 do_close_internal(msg->conn);
robert_jw 0:b2805b6888dc 1443 /* for tcp netconns, do_close_internal ACKs the message */
robert_jw 0:b2805b6888dc 1444 return;
robert_jw 0:b2805b6888dc 1445 }
robert_jw 0:b2805b6888dc 1446 } else
robert_jw 0:b2805b6888dc 1447 #endif /* LWIP_TCP */
robert_jw 0:b2805b6888dc 1448 {
robert_jw 0:b2805b6888dc 1449 msg->err = ERR_VAL;
robert_jw 0:b2805b6888dc 1450 }
robert_jw 0:b2805b6888dc 1451 sys_sem_signal(&msg->conn->op_completed);
robert_jw 0:b2805b6888dc 1452 }
robert_jw 0:b2805b6888dc 1453
robert_jw 0:b2805b6888dc 1454 #if LWIP_IGMP
robert_jw 0:b2805b6888dc 1455 /**
robert_jw 0:b2805b6888dc 1456 * Join multicast groups for UDP netconns.
robert_jw 0:b2805b6888dc 1457 * Called from netconn_join_leave_group
robert_jw 0:b2805b6888dc 1458 *
robert_jw 0:b2805b6888dc 1459 * @param msg the api_msg_msg pointing to the connection
robert_jw 0:b2805b6888dc 1460 */
robert_jw 0:b2805b6888dc 1461 void
robert_jw 0:b2805b6888dc 1462 do_join_leave_group(struct api_msg_msg *msg)
robert_jw 0:b2805b6888dc 1463 {
robert_jw 0:b2805b6888dc 1464 if (ERR_IS_FATAL(msg->conn->last_err)) {
robert_jw 0:b2805b6888dc 1465 msg->err = msg->conn->last_err;
robert_jw 0:b2805b6888dc 1466 } else {
robert_jw 0:b2805b6888dc 1467 if (msg->conn->pcb.tcp != NULL) {
robert_jw 0:b2805b6888dc 1468 if (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_UDP) {
robert_jw 0:b2805b6888dc 1469 #if LWIP_UDP
robert_jw 0:b2805b6888dc 1470 if (msg->msg.jl.join_or_leave == NETCONN_JOIN) {
robert_jw 0:b2805b6888dc 1471 msg->err = igmp_joingroup(msg->msg.jl.netif_addr, msg->msg.jl.multiaddr);
robert_jw 0:b2805b6888dc 1472 } else {
robert_jw 0:b2805b6888dc 1473 msg->err = igmp_leavegroup(msg->msg.jl.netif_addr, msg->msg.jl.multiaddr);
robert_jw 0:b2805b6888dc 1474 }
robert_jw 0:b2805b6888dc 1475 #endif /* LWIP_UDP */
robert_jw 0:b2805b6888dc 1476 #if (LWIP_TCP || LWIP_RAW)
robert_jw 0:b2805b6888dc 1477 } else {
robert_jw 0:b2805b6888dc 1478 msg->err = ERR_VAL;
robert_jw 0:b2805b6888dc 1479 #endif /* (LWIP_TCP || LWIP_RAW) */
robert_jw 0:b2805b6888dc 1480 }
robert_jw 0:b2805b6888dc 1481 } else {
robert_jw 0:b2805b6888dc 1482 msg->err = ERR_CONN;
robert_jw 0:b2805b6888dc 1483 }
robert_jw 0:b2805b6888dc 1484 }
robert_jw 0:b2805b6888dc 1485 TCPIP_APIMSG_ACK(msg);
robert_jw 0:b2805b6888dc 1486 }
robert_jw 0:b2805b6888dc 1487 #endif /* LWIP_IGMP */
robert_jw 0:b2805b6888dc 1488
robert_jw 0:b2805b6888dc 1489 #if LWIP_DNS
robert_jw 0:b2805b6888dc 1490 /**
robert_jw 0:b2805b6888dc 1491 * Callback function that is called when DNS name is resolved
robert_jw 0:b2805b6888dc 1492 * (or on timeout). A waiting application thread is waked up by
robert_jw 0:b2805b6888dc 1493 * signaling the semaphore.
robert_jw 0:b2805b6888dc 1494 */
robert_jw 0:b2805b6888dc 1495 static void
robert_jw 0:b2805b6888dc 1496 do_dns_found(const char *name, ip_addr_t *ipaddr, void *arg)
robert_jw 0:b2805b6888dc 1497 {
robert_jw 0:b2805b6888dc 1498 struct dns_api_msg *msg = (struct dns_api_msg*)arg;
robert_jw 0:b2805b6888dc 1499
robert_jw 0:b2805b6888dc 1500 LWIP_ASSERT("DNS response for wrong host name", strcmp(msg->name, name) == 0);
robert_jw 0:b2805b6888dc 1501 LWIP_UNUSED_ARG(name);
robert_jw 0:b2805b6888dc 1502
robert_jw 0:b2805b6888dc 1503 if (ipaddr == NULL) {
robert_jw 0:b2805b6888dc 1504 /* timeout or memory error */
robert_jw 0:b2805b6888dc 1505 *msg->err = ERR_VAL;
robert_jw 0:b2805b6888dc 1506 } else {
robert_jw 0:b2805b6888dc 1507 /* address was resolved */
robert_jw 0:b2805b6888dc 1508 *msg->err = ERR_OK;
robert_jw 0:b2805b6888dc 1509 *msg->addr = *ipaddr;
robert_jw 0:b2805b6888dc 1510 }
robert_jw 0:b2805b6888dc 1511 /* wake up the application task waiting in netconn_gethostbyname */
robert_jw 0:b2805b6888dc 1512 sys_sem_signal(msg->sem);
robert_jw 0:b2805b6888dc 1513 }
robert_jw 0:b2805b6888dc 1514
robert_jw 0:b2805b6888dc 1515 /**
robert_jw 0:b2805b6888dc 1516 * Execute a DNS query
robert_jw 0:b2805b6888dc 1517 * Called from netconn_gethostbyname
robert_jw 0:b2805b6888dc 1518 *
robert_jw 0:b2805b6888dc 1519 * @param arg the dns_api_msg pointing to the query
robert_jw 0:b2805b6888dc 1520 */
robert_jw 0:b2805b6888dc 1521 void
robert_jw 0:b2805b6888dc 1522 do_gethostbyname(void *arg)
robert_jw 0:b2805b6888dc 1523 {
robert_jw 0:b2805b6888dc 1524 struct dns_api_msg *msg = (struct dns_api_msg*)arg;
robert_jw 0:b2805b6888dc 1525
robert_jw 0:b2805b6888dc 1526 *msg->err = dns_gethostbyname(msg->name, msg->addr, do_dns_found, msg);
robert_jw 0:b2805b6888dc 1527 if (*msg->err != ERR_INPROGRESS) {
robert_jw 0:b2805b6888dc 1528 /* on error or immediate success, wake up the application
robert_jw 0:b2805b6888dc 1529 * task waiting in netconn_gethostbyname */
robert_jw 0:b2805b6888dc 1530 sys_sem_signal(msg->sem);
robert_jw 0:b2805b6888dc 1531 }
robert_jw 0:b2805b6888dc 1532 }
robert_jw 0:b2805b6888dc 1533 #endif /* LWIP_DNS */
robert_jw 0:b2805b6888dc 1534
robert_jw 0:b2805b6888dc 1535 #endif /* LWIP_NETCONN */