1 | /**
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2 | * @file
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3 | * Sequential API Internal module
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4 | *
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5 | */
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6 |
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7 | /*
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8 | * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
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9 | * All rights reserved.
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10 | *
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11 | * Redistribution and use in source and binary forms, with or without modification,
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12 | * are permitted provided that the following conditions are met:
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13 | *
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14 | * 1. Redistributions of source code must retain the above copyright notice,
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15 | * this list of conditions and the following disclaimer.
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16 | * 2. Redistributions in binary form must reproduce the above copyright notice,
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17 | * this list of conditions and the following disclaimer in the documentation
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18 | * and/or other materials provided with the distribution.
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19 | * 3. The name of the author may not be used to endorse or promote products
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20 | * derived from this software without specific prior written permission.
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21 | *
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22 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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23 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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24 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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25 | * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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26 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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27 | * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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28 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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29 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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30 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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31 | * OF SUCH DAMAGE.
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32 | *
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33 | * This file is part of the lwIP TCP/IP stack.
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34 | *
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35 | * Author: Adam Dunkels <adam@sics.se>
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36 | *
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37 | */
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38 |
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39 | #include "lwip/opt.h"
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40 |
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41 | #if LWIP_NETCONN /* don't build if not configured for use in lwipopts.h */
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42 |
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43 | #include "lwip/api_msg.h"
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44 |
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45 | #include "lwip/ip.h"
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46 | #include "lwip/udp.h"
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47 | #include "lwip/tcp.h"
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48 | #include "lwip/raw.h"
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49 |
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50 | #include "lwip/memp.h"
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51 | #include "lwip/tcpip.h"
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52 | #include "lwip/igmp.h"
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53 | #include "lwip/dns.h"
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54 |
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55 | #include <string.h>
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56 |
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57 | #define SET_NONBLOCKING_CONNECT(conn, val) do { if(val) { \
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58 | (conn)->flags |= NETCONN_FLAG_IN_NONBLOCKING_CONNECT; \
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59 | } else { \
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60 | (conn)->flags &= ~ NETCONN_FLAG_IN_NONBLOCKING_CONNECT; }} while(0)
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61 | #define IN_NONBLOCKING_CONNECT(conn) (((conn)->flags & NETCONN_FLAG_IN_NONBLOCKING_CONNECT) != 0)
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62 |
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63 | /* forward declarations */
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64 | #if LWIP_TCP
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65 | static err_t do_writemore(struct netconn *conn);
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66 | static void do_close_internal(struct netconn *conn);
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67 | #endif
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68 |
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69 | #if LWIP_RAW
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70 | /**
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71 | * Receive callback function for RAW netconns.
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72 | * Doesn't 'eat' the packet, only references it and sends it to
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73 | * conn->recvmbox
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74 | *
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75 | * @see raw.h (struct raw_pcb.recv) for parameters and return value
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76 | */
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77 | static u8_t
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78 | recv_raw(void *arg, struct raw_pcb *pcb, struct pbuf *p,
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79 | ip_addr_t *addr)
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80 | {
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81 | struct pbuf *q;
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82 | struct netbuf *buf;
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83 | struct netconn *conn;
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84 |
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85 | LWIP_UNUSED_ARG(addr);
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86 | conn = (struct netconn *)arg;
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87 |
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88 | if ((conn != NULL) && sys_mbox_valid(&conn->recvmbox)) {
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89 | #if LWIP_SO_RCVBUF
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90 | int recv_avail;
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91 | SYS_ARCH_GET(conn->recv_avail, recv_avail);
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92 | if ((recv_avail + (int)(p->tot_len)) > conn->recv_bufsize) {
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93 | return 0;
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94 | }
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95 | #endif /* LWIP_SO_RCVBUF */
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96 | /* copy the whole packet into new pbufs */
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97 | q = pbuf_alloc(PBUF_RAW, p->tot_len, PBUF_RAM);
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98 | if(q != NULL) {
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99 | if (pbuf_copy(q, p) != ERR_OK) {
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100 | pbuf_free(q);
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101 | q = NULL;
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102 | }
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103 | }
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104 |
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105 | if (q != NULL) {
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106 | u16_t len;
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107 | buf = (struct netbuf *)memp_malloc(MEMP_NETBUF);
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108 | if (buf == NULL) {
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109 | pbuf_free(q);
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110 | return 0;
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111 | }
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112 |
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113 | buf->p = q;
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114 | buf->ptr = q;
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115 | ip_addr_copy(buf->addr, *ip_current_src_addr());
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116 | buf->port = pcb->protocol;
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117 |
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118 | len = q->tot_len;
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119 | if (sys_mbox_trypost(&conn->recvmbox, buf) != ERR_OK) {
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120 | netbuf_delete(buf);
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121 | return 0;
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122 | } else {
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123 | #if LWIP_SO_RCVBUF
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124 | SYS_ARCH_INC(conn->recv_avail, len);
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125 | #endif /* LWIP_SO_RCVBUF */
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126 | /* Register event with callback */
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127 | API_EVENT(conn, NETCONN_EVT_RCVPLUS, len);
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128 | }
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129 | }
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130 | }
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131 |
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132 | return 0; /* do not eat the packet */
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133 | }
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134 | #endif /* LWIP_RAW*/
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135 |
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136 | #if LWIP_UDP
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137 | /**
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138 | * Receive callback function for UDP netconns.
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139 | * Posts the packet to conn->recvmbox or deletes it on memory error.
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140 | *
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141 | * @see udp.h (struct udp_pcb.recv) for parameters
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142 | */
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143 | static void
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144 | recv_udp(void *arg, struct udp_pcb *pcb, struct pbuf *p,
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145 | ip_addr_t *addr, u16_t port)
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146 | {
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147 | struct netbuf *buf;
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148 | struct netconn *conn;
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149 | u16_t len;
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150 | #if LWIP_SO_RCVBUF
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151 | int recv_avail;
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152 | #endif /* LWIP_SO_RCVBUF */
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153 |
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154 | LWIP_UNUSED_ARG(pcb); /* only used for asserts... */
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155 | LWIP_ASSERT("recv_udp must have a pcb argument", pcb != NULL);
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156 | LWIP_ASSERT("recv_udp must have an argument", arg != NULL);
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157 | conn = (struct netconn *)arg;
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158 | LWIP_ASSERT("recv_udp: recv for wrong pcb!", conn->pcb.udp == pcb);
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159 |
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160 | #if LWIP_SO_RCVBUF
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161 | SYS_ARCH_GET(conn->recv_avail, recv_avail);
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162 | if ((conn == NULL) || !sys_mbox_valid(&conn->recvmbox) ||
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163 | ((recv_avail + (int)(p->tot_len)) > conn->recv_bufsize)) {
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164 | #else /* LWIP_SO_RCVBUF */
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165 | if ((conn == NULL) || !sys_mbox_valid(&conn->recvmbox)) {
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166 | #endif /* LWIP_SO_RCVBUF */
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167 | pbuf_free(p);
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168 | return;
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169 | }
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170 |
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171 | buf = (struct netbuf *)memp_malloc(MEMP_NETBUF);
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172 | if (buf == NULL) {
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173 | pbuf_free(p);
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174 | return;
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175 | } else {
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176 | buf->p = p;
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177 | buf->ptr = p;
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178 | ip_addr_set(&buf->addr, addr);
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179 | buf->port = port;
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180 | #if LWIP_NETBUF_RECVINFO
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181 | {
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182 | const struct ip_hdr* iphdr = ip_current_header();
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183 | /* get the UDP header - always in the first pbuf, ensured by udp_input */
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184 | const struct udp_hdr* udphdr = (void*)(((char*)iphdr) + IPH_LEN(iphdr));
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185 | #if LWIP_CHECKSUM_ON_COPY
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186 | buf->flags = NETBUF_FLAG_DESTADDR;
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187 | #endif /* LWIP_CHECKSUM_ON_COPY */
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188 | ip_addr_set(&buf->toaddr, ip_current_dest_addr());
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189 | buf->toport_chksum = udphdr->dest;
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190 | }
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191 | #endif /* LWIP_NETBUF_RECVINFO */
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192 | }
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193 |
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194 | len = p->tot_len;
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195 | if (sys_mbox_trypost(&conn->recvmbox, buf) != ERR_OK) {
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196 | netbuf_delete(buf);
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197 | return;
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198 | } else {
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199 | #if LWIP_SO_RCVBUF
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200 | SYS_ARCH_INC(conn->recv_avail, len);
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201 | #endif /* LWIP_SO_RCVBUF */
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202 | /* Register event with callback */
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203 | API_EVENT(conn, NETCONN_EVT_RCVPLUS, len);
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204 | }
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205 | }
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206 | #endif /* LWIP_UDP */
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207 |
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208 | #if LWIP_TCP
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209 | /**
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210 | * Receive callback function for TCP netconns.
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211 | * Posts the packet to conn->recvmbox, but doesn't delete it on errors.
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212 | *
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213 | * @see tcp.h (struct tcp_pcb.recv) for parameters and return value
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214 | */
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215 | static err_t
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216 | recv_tcp(void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err)
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217 | {
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218 | struct netconn *conn;
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219 | u16_t len;
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220 |
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221 | LWIP_UNUSED_ARG(pcb);
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222 | LWIP_ASSERT("recv_tcp must have a pcb argument", pcb != NULL);
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223 | LWIP_ASSERT("recv_tcp must have an argument", arg != NULL);
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224 | conn = (struct netconn *)arg;
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225 | LWIP_ASSERT("recv_tcp: recv for wrong pcb!", conn->pcb.tcp == pcb);
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226 |
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227 | if (conn == NULL) {
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228 | return ERR_VAL;
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229 | }
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230 | if (!sys_mbox_valid(&conn->recvmbox)) {
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231 | /* recvmbox already deleted */
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232 | if (p != NULL) {
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233 | tcp_recved(pcb, p->tot_len);
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234 | pbuf_free(p);
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235 | }
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236 | return ERR_OK;
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237 | }
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238 | /* Unlike for UDP or RAW pcbs, don't check for available space
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239 | using recv_avail since that could break the connection
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240 | (data is already ACKed) */
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241 |
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242 | /* don't overwrite fatal errors! */
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243 | NETCONN_SET_SAFE_ERR(conn, err);
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244 |
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245 | if (p != NULL) {
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246 | len = p->tot_len;
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247 | } else {
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248 | len = 0;
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249 | }
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250 |
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251 | if (sys_mbox_trypost(&conn->recvmbox, p) != ERR_OK) {
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252 | /* don't deallocate p: it is presented to us later again from tcp_fasttmr! */
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253 | return ERR_MEM;
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254 | } else {
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255 | #if LWIP_SO_RCVBUF
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256 | SYS_ARCH_INC(conn->recv_avail, len);
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257 | #endif /* LWIP_SO_RCVBUF */
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258 | /* Register event with callback */
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259 | API_EVENT(conn, NETCONN_EVT_RCVPLUS, len);
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260 | }
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261 |
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262 | return ERR_OK;
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263 | }
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264 |
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265 | /**
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266 | * Poll callback function for TCP netconns.
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267 | * Wakes up an application thread that waits for a connection to close
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268 | * or data to be sent. The application thread then takes the
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269 | * appropriate action to go on.
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270 | *
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271 | * Signals the conn->sem.
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272 | * netconn_close waits for conn->sem if closing failed.
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273 | *
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274 | * @see tcp.h (struct tcp_pcb.poll) for parameters and return value
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275 | */
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276 | static err_t
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277 | poll_tcp(void *arg, struct tcp_pcb *pcb)
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278 | {
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279 | struct netconn *conn = (struct netconn *)arg;
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280 |
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281 | LWIP_UNUSED_ARG(pcb);
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282 | LWIP_ASSERT("conn != NULL", (conn != NULL));
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283 |
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284 | if (conn->state == NETCONN_WRITE) {
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285 | do_writemore(conn);
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286 | } else if (conn->state == NETCONN_CLOSE) {
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287 | do_close_internal(conn);
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288 | }
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289 | /* @todo: implement connect timeout here? */
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290 |
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291 | /* Did a nonblocking write fail before? Then check available write-space. */
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292 | if (conn->flags & NETCONN_FLAG_CHECK_WRITESPACE) {
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293 | /* If the queued byte- or pbuf-count drops below the configured low-water limit,
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294 | let select mark this pcb as writable again. */
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295 | if ((conn->pcb.tcp != NULL) && (tcp_sndbuf(conn->pcb.tcp) > TCP_SNDLOWAT) &&
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296 | (tcp_sndqueuelen(conn->pcb.tcp) < TCP_SNDQUEUELOWAT)) {
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297 | conn->flags &= ~NETCONN_FLAG_CHECK_WRITESPACE;
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298 | API_EVENT(conn, NETCONN_EVT_SENDPLUS, 0);
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299 | }
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300 | }
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301 |
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302 | return ERR_OK;
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303 | }
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304 |
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305 | /**
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306 | * Sent callback function for TCP netconns.
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307 | * Signals the conn->sem and calls API_EVENT.
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308 | * netconn_write waits for conn->sem if send buffer is low.
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309 | *
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310 | * @see tcp.h (struct tcp_pcb.sent) for parameters and return value
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311 | */
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312 | static err_t
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313 | sent_tcp(void *arg, struct tcp_pcb *pcb, u16_t len)
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314 | {
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315 | struct netconn *conn = (struct netconn *)arg;
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316 |
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317 | LWIP_UNUSED_ARG(pcb);
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318 | LWIP_ASSERT("conn != NULL", (conn != NULL));
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319 |
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320 | if (conn->state == NETCONN_WRITE) {
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321 | do_writemore(conn);
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322 | } else if (conn->state == NETCONN_CLOSE) {
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323 | do_close_internal(conn);
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324 | }
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325 |
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326 | if (conn) {
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327 | /* If the queued byte- or pbuf-count drops below the configured low-water limit,
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328 | let select mark this pcb as writable again. */
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329 | if ((conn->pcb.tcp != NULL) && (tcp_sndbuf(conn->pcb.tcp) > TCP_SNDLOWAT) &&
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330 | (tcp_sndqueuelen(conn->pcb.tcp) < TCP_SNDQUEUELOWAT)) {
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331 | conn->flags &= ~NETCONN_FLAG_CHECK_WRITESPACE;
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332 | API_EVENT(conn, NETCONN_EVT_SENDPLUS, len);
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333 | }
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334 | }
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335 |
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336 | return ERR_OK;
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337 | }
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338 |
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339 | /**
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340 | * Error callback function for TCP netconns.
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341 | * Signals conn->sem, posts to all conn mboxes and calls API_EVENT.
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342 | * The application thread has then to decide what to do.
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343 | *
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344 | * @see tcp.h (struct tcp_pcb.err) for parameters
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345 | */
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346 | static void
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347 | err_tcp(void *arg, err_t err)
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348 | {
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349 | struct netconn *conn;
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350 | enum netconn_state old_state;
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351 | SYS_ARCH_DECL_PROTECT(lev);
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352 |
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353 | conn = (struct netconn *)arg;
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354 | LWIP_ASSERT("conn != NULL", (conn != NULL));
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355 |
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356 | conn->pcb.tcp = NULL;
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357 |
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358 | /* no check since this is always fatal! */
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359 | SYS_ARCH_PROTECT(lev);
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360 | conn->last_err = err;
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361 | SYS_ARCH_UNPROTECT(lev);
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362 |
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363 | /* reset conn->state now before waking up other threads */
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364 | old_state = conn->state;
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365 | conn->state = NETCONN_NONE;
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366 |
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367 | /* Notify the user layer about a connection error. Used to signal
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368 | select. */
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369 | API_EVENT(conn, NETCONN_EVT_ERROR, 0);
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370 | /* Try to release selects pending on 'read' or 'write', too.
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371 | They will get an error if they actually try to read or write. */
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372 | API_EVENT(conn, NETCONN_EVT_RCVPLUS, 0);
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373 | API_EVENT(conn, NETCONN_EVT_SENDPLUS, 0);
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374 |
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375 | /* pass NULL-message to recvmbox to wake up pending recv */
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376 | if (sys_mbox_valid(&conn->recvmbox)) {
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377 | /* use trypost to prevent deadlock */
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378 | sys_mbox_trypost(&conn->recvmbox, NULL);
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379 | }
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380 | /* pass NULL-message to acceptmbox to wake up pending accept */
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381 | if (sys_mbox_valid(&conn->acceptmbox)) {
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382 | /* use trypost to preven deadlock */
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383 | sys_mbox_trypost(&conn->acceptmbox, NULL);
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384 | }
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385 |
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386 | if ((old_state == NETCONN_WRITE) || (old_state == NETCONN_CLOSE) ||
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387 | (old_state == NETCONN_CONNECT)) {
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388 | /* calling do_writemore/do_close_internal is not necessary
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389 | since the pcb has already been deleted! */
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390 | int was_nonblocking_connect = IN_NONBLOCKING_CONNECT(conn);
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391 | SET_NONBLOCKING_CONNECT(conn, 0);
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392 |
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393 | if (!was_nonblocking_connect) {
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394 | /* set error return code */
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395 | LWIP_ASSERT("conn->current_msg != NULL", conn->current_msg != NULL);
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396 | conn->current_msg->err = err;
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397 | conn->current_msg = NULL;
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398 | /* wake up the waiting task */
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399 | sys_sem_signal(&conn->op_completed);
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400 | }
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401 | } else {
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402 | LWIP_ASSERT("conn->current_msg == NULL", conn->current_msg == NULL);
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403 | }
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404 | }
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405 |
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406 | /**
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407 | * Setup a tcp_pcb with the correct callback function pointers
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408 | * and their arguments.
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409 | *
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410 | * @param conn the TCP netconn to setup
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411 | */
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412 | static void
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413 | setup_tcp(struct netconn *conn)
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414 | {
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415 | struct tcp_pcb *pcb;
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416 |
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417 | pcb = conn->pcb.tcp;
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418 | tcp_arg(pcb, conn);
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419 | tcp_recv(pcb, recv_tcp);
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420 | tcp_sent(pcb, sent_tcp);
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421 | tcp_poll(pcb, poll_tcp, 4);
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422 | tcp_err(pcb, err_tcp);
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423 | }
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424 |
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425 | /**
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426 | * Accept callback function for TCP netconns.
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427 | * Allocates a new netconn and posts that to conn->acceptmbox.
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428 | *
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429 | * @see tcp.h (struct tcp_pcb_listen.accept) for parameters and return value
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430 | */
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431 | static err_t
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432 | accept_function(void *arg, struct tcp_pcb *newpcb, err_t err)
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433 | {
|
---|
434 | struct netconn *newconn;
|
---|
435 | struct netconn *conn = (struct netconn *)arg;
|
---|
436 |
|
---|
437 | LWIP_DEBUGF(API_MSG_DEBUG, ("accept_function: newpcb->tate: %s\n", tcp_debug_state_str(newpcb->state)));
|
---|
438 |
|
---|
439 | if (!sys_mbox_valid(&conn->acceptmbox)) {
|
---|
440 | LWIP_DEBUGF(API_MSG_DEBUG, ("accept_function: acceptmbox already deleted\n"));
|
---|
441 | return ERR_VAL;
|
---|
442 | }
|
---|
443 |
|
---|
444 | /* We have to set the callback here even though
|
---|
445 | * the new socket is unknown. conn->socket is marked as -1. */
|
---|
446 | newconn = netconn_alloc(conn->type, conn->callback);
|
---|
447 | if (newconn == NULL) {
|
---|
448 | return ERR_MEM;
|
---|
449 | }
|
---|
450 | newconn->pcb.tcp = newpcb;
|
---|
451 | setup_tcp(newconn);
|
---|
452 | /* no protection: when creating the pcb, the netconn is not yet known
|
---|
453 | to the application thread */
|
---|
454 | newconn->last_err = err;
|
---|
455 |
|
---|
456 | if (sys_mbox_trypost(&conn->acceptmbox, newconn) != ERR_OK) {
|
---|
457 | /* When returning != ERR_OK, the pcb is aborted in tcp_process(),
|
---|
458 | so do nothing here! */
|
---|
459 | /* remove all references to this netconn from the pcb */
|
---|
460 | struct tcp_pcb* pcb = newconn->pcb.tcp;
|
---|
461 | tcp_arg(pcb, NULL);
|
---|
462 | tcp_recv(pcb, NULL);
|
---|
463 | tcp_sent(pcb, NULL);
|
---|
464 | tcp_poll(pcb, NULL, 4);
|
---|
465 | tcp_err(pcb, NULL);
|
---|
466 | /* remove reference from to the pcb from this netconn */
|
---|
467 | newconn->pcb.tcp = NULL;
|
---|
468 | /* no need to drain since we know the recvmbox is empty. */
|
---|
469 | sys_mbox_free(&newconn->recvmbox);
|
---|
470 | sys_mbox_set_invalid(&newconn->recvmbox);
|
---|
471 | netconn_free(newconn);
|
---|
472 | return ERR_MEM;
|
---|
473 | } else {
|
---|
474 | /* Register event with callback */
|
---|
475 | API_EVENT(conn, NETCONN_EVT_RCVPLUS, 0);
|
---|
476 | }
|
---|
477 |
|
---|
478 | return ERR_OK;
|
---|
479 | }
|
---|
480 | #endif /* LWIP_TCP */
|
---|
481 |
|
---|
482 | /**
|
---|
483 | * Create a new pcb of a specific type.
|
---|
484 | * Called from do_newconn().
|
---|
485 | *
|
---|
486 | * @param msg the api_msg_msg describing the connection type
|
---|
487 | * @return msg->conn->err, but the return value is currently ignored
|
---|
488 | */
|
---|
489 | static void
|
---|
490 | pcb_new(struct api_msg_msg *msg)
|
---|
491 | {
|
---|
492 | LWIP_ASSERT("pcb_new: pcb already allocated", msg->conn->pcb.tcp == NULL);
|
---|
493 |
|
---|
494 | /* Allocate a PCB for this connection */
|
---|
495 | switch(NETCONNTYPE_GROUP(msg->conn->type)) {
|
---|
496 | #if LWIP_RAW
|
---|
497 | case NETCONN_RAW:
|
---|
498 | msg->conn->pcb.raw = raw_new(msg->msg.n.proto);
|
---|
499 | if(msg->conn->pcb.raw == NULL) {
|
---|
500 | msg->err = ERR_MEM;
|
---|
501 | break;
|
---|
502 | }
|
---|
503 | raw_recv(msg->conn->pcb.raw, recv_raw, msg->conn);
|
---|
504 | break;
|
---|
505 | #endif /* LWIP_RAW */
|
---|
506 | #if LWIP_UDP
|
---|
507 | case NETCONN_UDP:
|
---|
508 | msg->conn->pcb.udp = udp_new();
|
---|
509 | if(msg->conn->pcb.udp == NULL) {
|
---|
510 | msg->err = ERR_MEM;
|
---|
511 | break;
|
---|
512 | }
|
---|
513 | #if LWIP_UDPLITE
|
---|
514 | if (msg->conn->type==NETCONN_UDPLITE) {
|
---|
515 | udp_setflags(msg->conn->pcb.udp, UDP_FLAGS_UDPLITE);
|
---|
516 | }
|
---|
517 | #endif /* LWIP_UDPLITE */
|
---|
518 | if (msg->conn->type==NETCONN_UDPNOCHKSUM) {
|
---|
519 | udp_setflags(msg->conn->pcb.udp, UDP_FLAGS_NOCHKSUM);
|
---|
520 | }
|
---|
521 | udp_recv(msg->conn->pcb.udp, recv_udp, msg->conn);
|
---|
522 | break;
|
---|
523 | #endif /* LWIP_UDP */
|
---|
524 | #if LWIP_TCP
|
---|
525 | case NETCONN_TCP:
|
---|
526 | msg->conn->pcb.tcp = tcp_new();
|
---|
527 | if(msg->conn->pcb.tcp == NULL) {
|
---|
528 | msg->err = ERR_MEM;
|
---|
529 | break;
|
---|
530 | }
|
---|
531 | setup_tcp(msg->conn);
|
---|
532 | break;
|
---|
533 | #endif /* LWIP_TCP */
|
---|
534 | default:
|
---|
535 | /* Unsupported netconn type, e.g. protocol disabled */
|
---|
536 | msg->err = ERR_VAL;
|
---|
537 | break;
|
---|
538 | }
|
---|
539 | }
|
---|
540 |
|
---|
541 | /**
|
---|
542 | * Create a new pcb of a specific type inside a netconn.
|
---|
543 | * Called from netconn_new_with_proto_and_callback.
|
---|
544 | *
|
---|
545 | * @param msg the api_msg_msg describing the connection type
|
---|
546 | */
|
---|
547 | void
|
---|
548 | do_newconn(struct api_msg_msg *msg)
|
---|
549 | {
|
---|
550 | msg->err = ERR_OK;
|
---|
551 | if(msg->conn->pcb.tcp == NULL) {
|
---|
552 | pcb_new(msg);
|
---|
553 | }
|
---|
554 | /* Else? This "new" connection already has a PCB allocated. */
|
---|
555 | /* Is this an error condition? Should it be deleted? */
|
---|
556 | /* We currently just are happy and return. */
|
---|
557 |
|
---|
558 | TCPIP_APIMSG_ACK(msg);
|
---|
559 | }
|
---|
560 |
|
---|
561 | /**
|
---|
562 | * Create a new netconn (of a specific type) that has a callback function.
|
---|
563 | * The corresponding pcb is NOT created!
|
---|
564 | *
|
---|
565 | * @param t the type of 'connection' to create (@see enum netconn_type)
|
---|
566 | * @param proto the IP protocol for RAW IP pcbs
|
---|
567 | * @param callback a function to call on status changes (RX available, TX'ed)
|
---|
568 | * @return a newly allocated struct netconn or
|
---|
569 | * NULL on memory error
|
---|
570 | */
|
---|
571 | struct netconn*
|
---|
572 | netconn_alloc(enum netconn_type t, netconn_callback callback)
|
---|
573 | {
|
---|
574 | struct netconn *conn;
|
---|
575 | int size;
|
---|
576 |
|
---|
577 | conn = (struct netconn *)memp_malloc(MEMP_NETCONN);
|
---|
578 | if (conn == NULL) {
|
---|
579 | return NULL;
|
---|
580 | }
|
---|
581 |
|
---|
582 | conn->last_err = ERR_OK;
|
---|
583 | conn->type = t;
|
---|
584 | conn->pcb.tcp = NULL;
|
---|
585 |
|
---|
586 | #if (DEFAULT_RAW_RECVMBOX_SIZE == DEFAULT_UDP_RECVMBOX_SIZE) && \
|
---|
587 | (DEFAULT_RAW_RECVMBOX_SIZE == DEFAULT_TCP_RECVMBOX_SIZE)
|
---|
588 | size = DEFAULT_RAW_RECVMBOX_SIZE;
|
---|
589 | #else
|
---|
590 | switch(NETCONNTYPE_GROUP(t)) {
|
---|
591 | #if LWIP_RAW
|
---|
592 | case NETCONN_RAW:
|
---|
593 | size = DEFAULT_RAW_RECVMBOX_SIZE;
|
---|
594 | break;
|
---|
595 | #endif /* LWIP_RAW */
|
---|
596 | #if LWIP_UDP
|
---|
597 | case NETCONN_UDP:
|
---|
598 | size = DEFAULT_UDP_RECVMBOX_SIZE;
|
---|
599 | break;
|
---|
600 | #endif /* LWIP_UDP */
|
---|
601 | #if LWIP_TCP
|
---|
602 | case NETCONN_TCP:
|
---|
603 | size = DEFAULT_TCP_RECVMBOX_SIZE;
|
---|
604 | break;
|
---|
605 | #endif /* LWIP_TCP */
|
---|
606 | default:
|
---|
607 | LWIP_ASSERT("netconn_alloc: undefined netconn_type", 0);
|
---|
608 | goto free_and_return;
|
---|
609 | }
|
---|
610 | #endif
|
---|
611 |
|
---|
612 | if (sys_sem_new(&conn->op_completed, 0) != ERR_OK) {
|
---|
613 | goto free_and_return;
|
---|
614 | }
|
---|
615 | if (sys_mbox_new(&conn->recvmbox, size) != ERR_OK) {
|
---|
616 | sys_sem_free(&conn->op_completed);
|
---|
617 | goto free_and_return;
|
---|
618 | }
|
---|
619 |
|
---|
620 | #if LWIP_TCP
|
---|
621 | sys_mbox_set_invalid(&conn->acceptmbox);
|
---|
622 | #endif
|
---|
623 | conn->state = NETCONN_NONE;
|
---|
624 | #if LWIP_SOCKET
|
---|
625 | /* initialize socket to -1 since 0 is a valid socket */
|
---|
626 | conn->socket = -1;
|
---|
627 | #endif /* LWIP_SOCKET */
|
---|
628 | conn->callback = callback;
|
---|
629 | #if LWIP_TCP
|
---|
630 | conn->current_msg = NULL;
|
---|
631 | conn->write_offset = 0;
|
---|
632 | #endif /* LWIP_TCP */
|
---|
633 | #if LWIP_SO_SNDTIMEO
|
---|
634 | conn->send_timeout = 0;
|
---|
635 | #endif /* LWIP_SO_SNDTIMEO */
|
---|
636 | #if LWIP_SO_RCVTIMEO
|
---|
637 | conn->recv_timeout = 0;
|
---|
638 | #endif /* LWIP_SO_RCVTIMEO */
|
---|
639 | #if LWIP_SO_RCVBUF
|
---|
640 | conn->recv_bufsize = RECV_BUFSIZE_DEFAULT;
|
---|
641 | conn->recv_avail = 0;
|
---|
642 | #endif /* LWIP_SO_RCVBUF */
|
---|
643 | conn->flags = 0;
|
---|
644 | return conn;
|
---|
645 | free_and_return:
|
---|
646 | memp_free(MEMP_NETCONN, conn);
|
---|
647 | return NULL;
|
---|
648 | }
|
---|
649 |
|
---|
650 | /**
|
---|
651 | * Delete a netconn and all its resources.
|
---|
652 | * The pcb is NOT freed (since we might not be in the right thread context do this).
|
---|
653 | *
|
---|
654 | * @param conn the netconn to free
|
---|
655 | */
|
---|
656 | void
|
---|
657 | netconn_free(struct netconn *conn)
|
---|
658 | {
|
---|
659 | LWIP_ASSERT("PCB must be deallocated outside this function", conn->pcb.tcp == NULL);
|
---|
660 | LWIP_ASSERT("recvmbox must be deallocated before calling this function",
|
---|
661 | !sys_mbox_valid(&conn->recvmbox));
|
---|
662 | #if LWIP_TCP
|
---|
663 | LWIP_ASSERT("acceptmbox must be deallocated before calling this function",
|
---|
664 | !sys_mbox_valid(&conn->acceptmbox));
|
---|
665 | #endif /* LWIP_TCP */
|
---|
666 |
|
---|
667 | sys_sem_free(&conn->op_completed);
|
---|
668 | sys_sem_set_invalid(&conn->op_completed);
|
---|
669 |
|
---|
670 | memp_free(MEMP_NETCONN, conn);
|
---|
671 | }
|
---|
672 |
|
---|
673 | /**
|
---|
674 | * Delete rcvmbox and acceptmbox of a netconn and free the left-over data in
|
---|
675 | * these mboxes
|
---|
676 | *
|
---|
677 | * @param conn the netconn to free
|
---|
678 | * @bytes_drained bytes drained from recvmbox
|
---|
679 | * @accepts_drained pending connections drained from acceptmbox
|
---|
680 | */
|
---|
681 | static void
|
---|
682 | netconn_drain(struct netconn *conn)
|
---|
683 | {
|
---|
684 | void *mem;
|
---|
685 | #if LWIP_TCP
|
---|
686 | struct pbuf *p;
|
---|
687 | #endif /* LWIP_TCP */
|
---|
688 |
|
---|
689 | /* This runs in tcpip_thread, so we don't need to lock against rx packets */
|
---|
690 |
|
---|
691 | /* Delete and drain the recvmbox. */
|
---|
692 | if (sys_mbox_valid(&conn->recvmbox)) {
|
---|
693 | while (sys_mbox_tryfetch(&conn->recvmbox, &mem) != SYS_MBOX_EMPTY) {
|
---|
694 | #if LWIP_TCP
|
---|
695 | if (conn->type == NETCONN_TCP) {
|
---|
696 | if(mem != NULL) {
|
---|
697 | p = (struct pbuf*)mem;
|
---|
698 | /* pcb might be set to NULL already by err_tcp() */
|
---|
699 | if (conn->pcb.tcp != NULL) {
|
---|
700 | tcp_recved(conn->pcb.tcp, p->tot_len);
|
---|
701 | }
|
---|
702 | pbuf_free(p);
|
---|
703 | }
|
---|
704 | } else
|
---|
705 | #endif /* LWIP_TCP */
|
---|
706 | {
|
---|
707 | netbuf_delete((struct netbuf *)mem);
|
---|
708 | }
|
---|
709 | }
|
---|
710 | sys_mbox_free(&conn->recvmbox);
|
---|
711 | sys_mbox_set_invalid(&conn->recvmbox);
|
---|
712 | }
|
---|
713 |
|
---|
714 | /* Delete and drain the acceptmbox. */
|
---|
715 | #if LWIP_TCP
|
---|
716 | if (sys_mbox_valid(&conn->acceptmbox)) {
|
---|
717 | while (sys_mbox_tryfetch(&conn->acceptmbox, &mem) != SYS_MBOX_EMPTY) {
|
---|
718 | struct netconn *newconn = (struct netconn *)mem;
|
---|
719 | /* Only tcp pcbs have an acceptmbox, so no need to check conn->type */
|
---|
720 | /* pcb might be set to NULL already by err_tcp() */
|
---|
721 | if (conn->pcb.tcp != NULL) {
|
---|
722 | tcp_accepted(conn->pcb.tcp);
|
---|
723 | }
|
---|
724 | /* drain recvmbox */
|
---|
725 | netconn_drain(newconn);
|
---|
726 | if (newconn->pcb.tcp != NULL) {
|
---|
727 | tcp_abort(newconn->pcb.tcp);
|
---|
728 | newconn->pcb.tcp = NULL;
|
---|
729 | }
|
---|
730 | netconn_free(newconn);
|
---|
731 | }
|
---|
732 | sys_mbox_free(&conn->acceptmbox);
|
---|
733 | sys_mbox_set_invalid(&conn->acceptmbox);
|
---|
734 | }
|
---|
735 | #endif /* LWIP_TCP */
|
---|
736 | }
|
---|
737 |
|
---|
738 | #if LWIP_TCP
|
---|
739 | /**
|
---|
740 | * Internal helper function to close a TCP netconn: since this sometimes
|
---|
741 | * doesn't work at the first attempt, this function is called from multiple
|
---|
742 | * places.
|
---|
743 | *
|
---|
744 | * @param conn the TCP netconn to close
|
---|
745 | */
|
---|
746 | static void
|
---|
747 | do_close_internal(struct netconn *conn)
|
---|
748 | {
|
---|
749 | err_t err;
|
---|
750 | u8_t shut, shut_rx, shut_tx, close;
|
---|
751 |
|
---|
752 | LWIP_ASSERT("invalid conn", (conn != NULL));
|
---|
753 | LWIP_ASSERT("this is for tcp netconns only", (conn->type == NETCONN_TCP));
|
---|
754 | LWIP_ASSERT("conn must be in state NETCONN_CLOSE", (conn->state == NETCONN_CLOSE));
|
---|
755 | LWIP_ASSERT("pcb already closed", (conn->pcb.tcp != NULL));
|
---|
756 | LWIP_ASSERT("conn->current_msg != NULL", conn->current_msg != NULL);
|
---|
757 |
|
---|
758 | shut = conn->current_msg->msg.sd.shut;
|
---|
759 | shut_rx = shut & NETCONN_SHUT_RD;
|
---|
760 | shut_tx = shut & NETCONN_SHUT_WR;
|
---|
761 | /* shutting down both ends is the same as closing */
|
---|
762 | close = shut == NETCONN_SHUT_RDWR;
|
---|
763 |
|
---|
764 | /* Set back some callback pointers */
|
---|
765 | if (close) {
|
---|
766 | tcp_arg(conn->pcb.tcp, NULL);
|
---|
767 | }
|
---|
768 | if (conn->pcb.tcp->state == LISTEN) {
|
---|
769 | tcp_accept(conn->pcb.tcp, NULL);
|
---|
770 | } else {
|
---|
771 | /* some callbacks have to be reset if tcp_close is not successful */
|
---|
772 | if (shut_rx) {
|
---|
773 | tcp_recv(conn->pcb.tcp, NULL);
|
---|
774 | tcp_accept(conn->pcb.tcp, NULL);
|
---|
775 | }
|
---|
776 | if (shut_tx) {
|
---|
777 | tcp_sent(conn->pcb.tcp, NULL);
|
---|
778 | }
|
---|
779 | if (close) {
|
---|
780 | tcp_poll(conn->pcb.tcp, NULL, 4);
|
---|
781 | tcp_err(conn->pcb.tcp, NULL);
|
---|
782 | }
|
---|
783 | }
|
---|
784 | /* Try to close the connection */
|
---|
785 | if (close) {
|
---|
786 | err = tcp_close(conn->pcb.tcp);
|
---|
787 | } else {
|
---|
788 | err = tcp_shutdown(conn->pcb.tcp, shut_rx, shut_tx);
|
---|
789 | }
|
---|
790 | if (err == ERR_OK) {
|
---|
791 | /* Closing succeeded */
|
---|
792 | conn->current_msg->err = ERR_OK;
|
---|
793 | conn->current_msg = NULL;
|
---|
794 | conn->state = NETCONN_NONE;
|
---|
795 | if (close) {
|
---|
796 | /* Set back some callback pointers as conn is going away */
|
---|
797 | conn->pcb.tcp = NULL;
|
---|
798 | /* Trigger select() in socket layer. Make sure everybody notices activity
|
---|
799 | on the connection, error first! */
|
---|
800 | API_EVENT(conn, NETCONN_EVT_ERROR, 0);
|
---|
801 | }
|
---|
802 | if (shut_rx) {
|
---|
803 | API_EVENT(conn, NETCONN_EVT_RCVPLUS, 0);
|
---|
804 | }
|
---|
805 | if (shut_tx) {
|
---|
806 | API_EVENT(conn, NETCONN_EVT_SENDPLUS, 0);
|
---|
807 | }
|
---|
808 | /* wake up the application task */
|
---|
809 | sys_sem_signal(&conn->op_completed);
|
---|
810 | } else {
|
---|
811 | /* Closing failed, restore some of the callbacks */
|
---|
812 | /* Closing of listen pcb will never fail! */
|
---|
813 | LWIP_ASSERT("Closing a listen pcb may not fail!", (conn->pcb.tcp->state != LISTEN));
|
---|
814 | tcp_sent(conn->pcb.tcp, sent_tcp);
|
---|
815 | tcp_poll(conn->pcb.tcp, poll_tcp, 4);
|
---|
816 | tcp_err(conn->pcb.tcp, err_tcp);
|
---|
817 | tcp_arg(conn->pcb.tcp, conn);
|
---|
818 | /* don't restore recv callback: we don't want to receive any more data */
|
---|
819 | }
|
---|
820 | /* If closing didn't succeed, we get called again either
|
---|
821 | from poll_tcp or from sent_tcp */
|
---|
822 | }
|
---|
823 | #endif /* LWIP_TCP */
|
---|
824 |
|
---|
825 | /**
|
---|
826 | * Delete the pcb inside a netconn.
|
---|
827 | * Called from netconn_delete.
|
---|
828 | *
|
---|
829 | * @param msg the api_msg_msg pointing to the connection
|
---|
830 | */
|
---|
831 | void
|
---|
832 | do_delconn(struct api_msg_msg *msg)
|
---|
833 | {
|
---|
834 | /* @todo TCP: abort running write/connect? */
|
---|
835 | if ((msg->conn->state != NETCONN_NONE) &&
|
---|
836 | (msg->conn->state != NETCONN_LISTEN) &&
|
---|
837 | (msg->conn->state != NETCONN_CONNECT)) {
|
---|
838 | /* this only happens for TCP netconns */
|
---|
839 | LWIP_ASSERT("msg->conn->type == NETCONN_TCP", msg->conn->type == NETCONN_TCP);
|
---|
840 | msg->err = ERR_INPROGRESS;
|
---|
841 | } else {
|
---|
842 | LWIP_ASSERT("blocking connect in progress",
|
---|
843 | (msg->conn->state != NETCONN_CONNECT) || IN_NONBLOCKING_CONNECT(msg->conn));
|
---|
844 | /* Drain and delete mboxes */
|
---|
845 | netconn_drain(msg->conn);
|
---|
846 |
|
---|
847 | if (msg->conn->pcb.tcp != NULL) {
|
---|
848 |
|
---|
849 | switch (NETCONNTYPE_GROUP(msg->conn->type)) {
|
---|
850 | #if LWIP_RAW
|
---|
851 | case NETCONN_RAW:
|
---|
852 | raw_remove(msg->conn->pcb.raw);
|
---|
853 | break;
|
---|
854 | #endif /* LWIP_RAW */
|
---|
855 | #if LWIP_UDP
|
---|
856 | case NETCONN_UDP:
|
---|
857 | msg->conn->pcb.udp->recv_arg = NULL;
|
---|
858 | udp_remove(msg->conn->pcb.udp);
|
---|
859 | break;
|
---|
860 | #endif /* LWIP_UDP */
|
---|
861 | #if LWIP_TCP
|
---|
862 | case NETCONN_TCP:
|
---|
863 | LWIP_ASSERT("already writing or closing", msg->conn->current_msg == NULL &&
|
---|
864 | msg->conn->write_offset == 0);
|
---|
865 | msg->conn->state = NETCONN_CLOSE;
|
---|
866 | msg->msg.sd.shut = NETCONN_SHUT_RDWR;
|
---|
867 | msg->conn->current_msg = msg;
|
---|
868 | do_close_internal(msg->conn);
|
---|
869 | /* API_EVENT is called inside do_close_internal, before releasing
|
---|
870 | the application thread, so we can return at this point! */
|
---|
871 | return;
|
---|
872 | #endif /* LWIP_TCP */
|
---|
873 | default:
|
---|
874 | break;
|
---|
875 | }
|
---|
876 | msg->conn->pcb.tcp = NULL;
|
---|
877 | }
|
---|
878 | /* tcp netconns don't come here! */
|
---|
879 |
|
---|
880 | /* @todo: this lets select make the socket readable and writable,
|
---|
881 | which is wrong! errfd instead? */
|
---|
882 | API_EVENT(msg->conn, NETCONN_EVT_RCVPLUS, 0);
|
---|
883 | API_EVENT(msg->conn, NETCONN_EVT_SENDPLUS, 0);
|
---|
884 | }
|
---|
885 | if (sys_sem_valid(&msg->conn->op_completed)) {
|
---|
886 | sys_sem_signal(&msg->conn->op_completed);
|
---|
887 | }
|
---|
888 | }
|
---|
889 |
|
---|
890 | /**
|
---|
891 | * Bind a pcb contained in a netconn
|
---|
892 | * Called from netconn_bind.
|
---|
893 | *
|
---|
894 | * @param msg the api_msg_msg pointing to the connection and containing
|
---|
895 | * the IP address and port to bind to
|
---|
896 | */
|
---|
897 | void
|
---|
898 | do_bind(struct api_msg_msg *msg)
|
---|
899 | {
|
---|
900 | if (ERR_IS_FATAL(msg->conn->last_err)) {
|
---|
901 | msg->err = msg->conn->last_err;
|
---|
902 | } else {
|
---|
903 | msg->err = ERR_VAL;
|
---|
904 | if (msg->conn->pcb.tcp != NULL) {
|
---|
905 | switch (NETCONNTYPE_GROUP(msg->conn->type)) {
|
---|
906 | #if LWIP_RAW
|
---|
907 | case NETCONN_RAW:
|
---|
908 | msg->err = raw_bind(msg->conn->pcb.raw, msg->msg.bc.ipaddr);
|
---|
909 | break;
|
---|
910 | #endif /* LWIP_RAW */
|
---|
911 | #if LWIP_UDP
|
---|
912 | case NETCONN_UDP:
|
---|
913 | msg->err = udp_bind(msg->conn->pcb.udp, msg->msg.bc.ipaddr, msg->msg.bc.port);
|
---|
914 | break;
|
---|
915 | #endif /* LWIP_UDP */
|
---|
916 | #if LWIP_TCP
|
---|
917 | case NETCONN_TCP:
|
---|
918 | msg->err = tcp_bind(msg->conn->pcb.tcp, msg->msg.bc.ipaddr, msg->msg.bc.port);
|
---|
919 | break;
|
---|
920 | #endif /* LWIP_TCP */
|
---|
921 | default:
|
---|
922 | break;
|
---|
923 | }
|
---|
924 | }
|
---|
925 | }
|
---|
926 | TCPIP_APIMSG_ACK(msg);
|
---|
927 | }
|
---|
928 |
|
---|
929 | #if LWIP_TCP
|
---|
930 | /**
|
---|
931 | * TCP callback function if a connection (opened by tcp_connect/do_connect) has
|
---|
932 | * been established (or reset by the remote host).
|
---|
933 | *
|
---|
934 | * @see tcp.h (struct tcp_pcb.connected) for parameters and return values
|
---|
935 | */
|
---|
936 | static err_t
|
---|
937 | do_connected(void *arg, struct tcp_pcb *pcb, err_t err)
|
---|
938 | {
|
---|
939 | struct netconn *conn;
|
---|
940 | int was_blocking;
|
---|
941 |
|
---|
942 | LWIP_UNUSED_ARG(pcb);
|
---|
943 |
|
---|
944 | conn = (struct netconn *)arg;
|
---|
945 |
|
---|
946 | if (conn == NULL) {
|
---|
947 | return ERR_VAL;
|
---|
948 | }
|
---|
949 |
|
---|
950 | LWIP_ASSERT("conn->state == NETCONN_CONNECT", conn->state == NETCONN_CONNECT);
|
---|
951 | LWIP_ASSERT("(conn->current_msg != NULL) || conn->in_non_blocking_connect",
|
---|
952 | (conn->current_msg != NULL) || IN_NONBLOCKING_CONNECT(conn));
|
---|
953 |
|
---|
954 | if (conn->current_msg != NULL) {
|
---|
955 | conn->current_msg->err = err;
|
---|
956 | }
|
---|
957 | if ((conn->type == NETCONN_TCP) && (err == ERR_OK)) {
|
---|
958 | setup_tcp(conn);
|
---|
959 | }
|
---|
960 | was_blocking = !IN_NONBLOCKING_CONNECT(conn);
|
---|
961 | SET_NONBLOCKING_CONNECT(conn, 0);
|
---|
962 | conn->current_msg = NULL;
|
---|
963 | conn->state = NETCONN_NONE;
|
---|
964 | if (!was_blocking) {
|
---|
965 | NETCONN_SET_SAFE_ERR(conn, ERR_OK);
|
---|
966 | }
|
---|
967 | API_EVENT(conn, NETCONN_EVT_SENDPLUS, 0);
|
---|
968 |
|
---|
969 | if (was_blocking) {
|
---|
970 | sys_sem_signal(&conn->op_completed);
|
---|
971 | }
|
---|
972 | return ERR_OK;
|
---|
973 | }
|
---|
974 | #endif /* LWIP_TCP */
|
---|
975 |
|
---|
976 | /**
|
---|
977 | * Connect a pcb contained inside a netconn
|
---|
978 | * Called from netconn_connect.
|
---|
979 | *
|
---|
980 | * @param msg the api_msg_msg pointing to the connection and containing
|
---|
981 | * the IP address and port to connect to
|
---|
982 | */
|
---|
983 | void
|
---|
984 | do_connect(struct api_msg_msg *msg)
|
---|
985 | {
|
---|
986 | if (msg->conn->pcb.tcp == NULL) {
|
---|
987 | /* This may happen when calling netconn_connect() a second time */
|
---|
988 | msg->err = ERR_CLSD;
|
---|
989 | } else {
|
---|
990 | switch (NETCONNTYPE_GROUP(msg->conn->type)) {
|
---|
991 | #if LWIP_RAW
|
---|
992 | case NETCONN_RAW:
|
---|
993 | msg->err = raw_connect(msg->conn->pcb.raw, msg->msg.bc.ipaddr);
|
---|
994 | break;
|
---|
995 | #endif /* LWIP_RAW */
|
---|
996 | #if LWIP_UDP
|
---|
997 | case NETCONN_UDP:
|
---|
998 | msg->err = udp_connect(msg->conn->pcb.udp, msg->msg.bc.ipaddr, msg->msg.bc.port);
|
---|
999 | break;
|
---|
1000 | #endif /* LWIP_UDP */
|
---|
1001 | #if LWIP_TCP
|
---|
1002 | case NETCONN_TCP:
|
---|
1003 | /* Prevent connect while doing any other action. */
|
---|
1004 | if (msg->conn->state != NETCONN_NONE) {
|
---|
1005 | msg->err = ERR_ISCONN;
|
---|
1006 | } else {
|
---|
1007 | setup_tcp(msg->conn);
|
---|
1008 | msg->err = tcp_connect(msg->conn->pcb.tcp, msg->msg.bc.ipaddr,
|
---|
1009 | msg->msg.bc.port, do_connected);
|
---|
1010 | if (msg->err == ERR_OK) {
|
---|
1011 | u8_t non_blocking = netconn_is_nonblocking(msg->conn);
|
---|
1012 | msg->conn->state = NETCONN_CONNECT;
|
---|
1013 | SET_NONBLOCKING_CONNECT(msg->conn, non_blocking);
|
---|
1014 | if (non_blocking) {
|
---|
1015 | msg->err = ERR_INPROGRESS;
|
---|
1016 | } else {
|
---|
1017 | msg->conn->current_msg = msg;
|
---|
1018 | /* sys_sem_signal() is called from do_connected (or err_tcp()),
|
---|
1019 | * when the connection is established! */
|
---|
1020 | return;
|
---|
1021 | }
|
---|
1022 | }
|
---|
1023 | }
|
---|
1024 | break;
|
---|
1025 | #endif /* LWIP_TCP */
|
---|
1026 | default:
|
---|
1027 | LWIP_ERROR("Invalid netconn type", 0, do{ msg->err = ERR_VAL; }while(0));
|
---|
1028 | break;
|
---|
1029 | }
|
---|
1030 | }
|
---|
1031 | sys_sem_signal(&msg->conn->op_completed);
|
---|
1032 | }
|
---|
1033 |
|
---|
1034 | /**
|
---|
1035 | * Connect a pcb contained inside a netconn
|
---|
1036 | * Only used for UDP netconns.
|
---|
1037 | * Called from netconn_disconnect.
|
---|
1038 | *
|
---|
1039 | * @param msg the api_msg_msg pointing to the connection to disconnect
|
---|
1040 | */
|
---|
1041 | void
|
---|
1042 | do_disconnect(struct api_msg_msg *msg)
|
---|
1043 | {
|
---|
1044 | #if LWIP_UDP
|
---|
1045 | if (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_UDP) {
|
---|
1046 | udp_disconnect(msg->conn->pcb.udp);
|
---|
1047 | msg->err = ERR_OK;
|
---|
1048 | } else
|
---|
1049 | #endif /* LWIP_UDP */
|
---|
1050 | {
|
---|
1051 | msg->err = ERR_VAL;
|
---|
1052 | }
|
---|
1053 | TCPIP_APIMSG_ACK(msg);
|
---|
1054 | }
|
---|
1055 |
|
---|
1056 | #if LWIP_TCP
|
---|
1057 | /**
|
---|
1058 | * Set a TCP pcb contained in a netconn into listen mode
|
---|
1059 | * Called from netconn_listen.
|
---|
1060 | *
|
---|
1061 | * @param msg the api_msg_msg pointing to the connection
|
---|
1062 | */
|
---|
1063 | void
|
---|
1064 | do_listen(struct api_msg_msg *msg)
|
---|
1065 | {
|
---|
1066 | if (ERR_IS_FATAL(msg->conn->last_err)) {
|
---|
1067 | msg->err = msg->conn->last_err;
|
---|
1068 | } else {
|
---|
1069 | msg->err = ERR_CONN;
|
---|
1070 | if (msg->conn->pcb.tcp != NULL) {
|
---|
1071 | if (msg->conn->type == NETCONN_TCP) {
|
---|
1072 | if (msg->conn->state == NETCONN_NONE) {
|
---|
1073 | #if TCP_LISTEN_BACKLOG
|
---|
1074 | struct tcp_pcb* lpcb = tcp_listen_with_backlog(msg->conn->pcb.tcp, msg->msg.lb.backlog);
|
---|
1075 | #else /* TCP_LISTEN_BACKLOG */
|
---|
1076 | struct tcp_pcb* lpcb = tcp_listen(msg->conn->pcb.tcp);
|
---|
1077 | #endif /* TCP_LISTEN_BACKLOG */
|
---|
1078 | if (lpcb == NULL) {
|
---|
1079 | /* in this case, the old pcb is still allocated */
|
---|
1080 | msg->err = ERR_MEM;
|
---|
1081 | } else {
|
---|
1082 | /* delete the recvmbox and allocate the acceptmbox */
|
---|
1083 | if (sys_mbox_valid(&msg->conn->recvmbox)) {
|
---|
1084 | /** @todo: should we drain the recvmbox here? */
|
---|
1085 | sys_mbox_free(&msg->conn->recvmbox);
|
---|
1086 | sys_mbox_set_invalid(&msg->conn->recvmbox);
|
---|
1087 | }
|
---|
1088 | msg->err = ERR_OK;
|
---|
1089 | if (!sys_mbox_valid(&msg->conn->acceptmbox)) {
|
---|
1090 | msg->err = sys_mbox_new(&msg->conn->acceptmbox, DEFAULT_ACCEPTMBOX_SIZE);
|
---|
1091 | }
|
---|
1092 | if (msg->err == ERR_OK) {
|
---|
1093 | msg->conn->state = NETCONN_LISTEN;
|
---|
1094 | msg->conn->pcb.tcp = lpcb;
|
---|
1095 | tcp_arg(msg->conn->pcb.tcp, msg->conn);
|
---|
1096 | tcp_accept(msg->conn->pcb.tcp, accept_function);
|
---|
1097 | } else {
|
---|
1098 | /* since the old pcb is already deallocated, free lpcb now */
|
---|
1099 | tcp_close(lpcb);
|
---|
1100 | msg->conn->pcb.tcp = NULL;
|
---|
1101 | }
|
---|
1102 | }
|
---|
1103 | }
|
---|
1104 | } else {
|
---|
1105 | msg->err = ERR_ARG;
|
---|
1106 | }
|
---|
1107 | }
|
---|
1108 | }
|
---|
1109 | TCPIP_APIMSG_ACK(msg);
|
---|
1110 | }
|
---|
1111 | #endif /* LWIP_TCP */
|
---|
1112 |
|
---|
1113 | /**
|
---|
1114 | * Send some data on a RAW or UDP pcb contained in a netconn
|
---|
1115 | * Called from netconn_send
|
---|
1116 | *
|
---|
1117 | * @param msg the api_msg_msg pointing to the connection
|
---|
1118 | */
|
---|
1119 | void
|
---|
1120 | do_send(struct api_msg_msg *msg)
|
---|
1121 | {
|
---|
1122 | if (ERR_IS_FATAL(msg->conn->last_err)) {
|
---|
1123 | msg->err = msg->conn->last_err;
|
---|
1124 | } else {
|
---|
1125 | msg->err = ERR_CONN;
|
---|
1126 | if (msg->conn->pcb.tcp != NULL) {
|
---|
1127 | switch (NETCONNTYPE_GROUP(msg->conn->type)) {
|
---|
1128 | #if LWIP_RAW
|
---|
1129 | case NETCONN_RAW:
|
---|
1130 | if (ip_addr_isany(&msg->msg.b->addr)) {
|
---|
1131 | msg->err = raw_send(msg->conn->pcb.raw, msg->msg.b->p);
|
---|
1132 | } else {
|
---|
1133 | msg->err = raw_sendto(msg->conn->pcb.raw, msg->msg.b->p, &msg->msg.b->addr);
|
---|
1134 | }
|
---|
1135 | break;
|
---|
1136 | #endif
|
---|
1137 | #if LWIP_UDP
|
---|
1138 | case NETCONN_UDP:
|
---|
1139 | #if LWIP_CHECKSUM_ON_COPY
|
---|
1140 | if (ip_addr_isany(&msg->msg.b->addr)) {
|
---|
1141 | msg->err = udp_send_chksum(msg->conn->pcb.udp, msg->msg.b->p,
|
---|
1142 | msg->msg.b->flags & NETBUF_FLAG_CHKSUM, msg->msg.b->toport_chksum);
|
---|
1143 | } else {
|
---|
1144 | msg->err = udp_sendto_chksum(msg->conn->pcb.udp, msg->msg.b->p,
|
---|
1145 | &msg->msg.b->addr, msg->msg.b->port,
|
---|
1146 | msg->msg.b->flags & NETBUF_FLAG_CHKSUM, msg->msg.b->toport_chksum);
|
---|
1147 | }
|
---|
1148 | #else /* LWIP_CHECKSUM_ON_COPY */
|
---|
1149 | if (ip_addr_isany(&msg->msg.b->addr)) {
|
---|
1150 | msg->err = udp_send(msg->conn->pcb.udp, msg->msg.b->p);
|
---|
1151 | } else {
|
---|
1152 | msg->err = udp_sendto(msg->conn->pcb.udp, msg->msg.b->p, &msg->msg.b->addr, msg->msg.b->port);
|
---|
1153 | }
|
---|
1154 | #endif /* LWIP_CHECKSUM_ON_COPY */
|
---|
1155 | break;
|
---|
1156 | #endif /* LWIP_UDP */
|
---|
1157 | default:
|
---|
1158 | break;
|
---|
1159 | }
|
---|
1160 | }
|
---|
1161 | }
|
---|
1162 | TCPIP_APIMSG_ACK(msg);
|
---|
1163 | }
|
---|
1164 |
|
---|
1165 | #if LWIP_TCP
|
---|
1166 | /**
|
---|
1167 | * Indicate data has been received from a TCP pcb contained in a netconn
|
---|
1168 | * Called from netconn_recv
|
---|
1169 | *
|
---|
1170 | * @param msg the api_msg_msg pointing to the connection
|
---|
1171 | */
|
---|
1172 | void
|
---|
1173 | do_recv(struct api_msg_msg *msg)
|
---|
1174 | {
|
---|
1175 | msg->err = ERR_OK;
|
---|
1176 | if (msg->conn->pcb.tcp != NULL) {
|
---|
1177 | if (msg->conn->type == NETCONN_TCP) {
|
---|
1178 | #if TCP_LISTEN_BACKLOG
|
---|
1179 | if (msg->conn->pcb.tcp->state == LISTEN) {
|
---|
1180 | tcp_accepted(msg->conn->pcb.tcp);
|
---|
1181 | } else
|
---|
1182 | #endif /* TCP_LISTEN_BACKLOG */
|
---|
1183 | {
|
---|
1184 | u32_t remaining = msg->msg.r.len;
|
---|
1185 | do {
|
---|
1186 | u16_t recved = (remaining > 0xffff) ? 0xffff : (u16_t)remaining;
|
---|
1187 | tcp_recved(msg->conn->pcb.tcp, recved);
|
---|
1188 | remaining -= recved;
|
---|
1189 | }while(remaining != 0);
|
---|
1190 | }
|
---|
1191 | }
|
---|
1192 | }
|
---|
1193 | TCPIP_APIMSG_ACK(msg);
|
---|
1194 | }
|
---|
1195 |
|
---|
1196 | /**
|
---|
1197 | * See if more data needs to be written from a previous call to netconn_write.
|
---|
1198 | * Called initially from do_write. If the first call can't send all data
|
---|
1199 | * (because of low memory or empty send-buffer), this function is called again
|
---|
1200 | * from sent_tcp() or poll_tcp() to send more data. If all data is sent, the
|
---|
1201 | * blocking application thread (waiting in netconn_write) is released.
|
---|
1202 | *
|
---|
1203 | * @param conn netconn (that is currently in state NETCONN_WRITE) to process
|
---|
1204 | * @return ERR_OK
|
---|
1205 | * ERR_MEM if LWIP_TCPIP_CORE_LOCKING=1 and sending hasn't yet finished
|
---|
1206 | */
|
---|
1207 | static err_t
|
---|
1208 | do_writemore(struct netconn *conn)
|
---|
1209 | {
|
---|
1210 | err_t err;
|
---|
1211 | void *dataptr;
|
---|
1212 | u16_t len, available;
|
---|
1213 | u8_t write_finished = 0;
|
---|
1214 | size_t diff;
|
---|
1215 | u8_t dontblock = netconn_is_nonblocking(conn) ||
|
---|
1216 | (conn->current_msg->msg.w.apiflags & NETCONN_DONTBLOCK);
|
---|
1217 | u8_t apiflags = conn->current_msg->msg.w.apiflags;
|
---|
1218 |
|
---|
1219 | LWIP_ASSERT("conn != NULL", conn != NULL);
|
---|
1220 | LWIP_ASSERT("conn->state == NETCONN_WRITE", (conn->state == NETCONN_WRITE));
|
---|
1221 | LWIP_ASSERT("conn->current_msg != NULL", conn->current_msg != NULL);
|
---|
1222 | LWIP_ASSERT("conn->pcb.tcp != NULL", conn->pcb.tcp != NULL);
|
---|
1223 | LWIP_ASSERT("conn->write_offset < conn->current_msg->msg.w.len",
|
---|
1224 | conn->write_offset < conn->current_msg->msg.w.len);
|
---|
1225 |
|
---|
1226 | #if LWIP_SO_SNDTIMEO
|
---|
1227 | if ((conn->send_timeout != 0) &&
|
---|
1228 | ((s32_t)(sys_now() - conn->current_msg->msg.w.time_started) >= conn->send_timeout)) {
|
---|
1229 | write_finished = 1;
|
---|
1230 | if (conn->write_offset == 0) {
|
---|
1231 | /* nothing has been written */
|
---|
1232 | err = ERR_WOULDBLOCK;
|
---|
1233 | conn->current_msg->msg.w.len = 0;
|
---|
1234 | } else {
|
---|
1235 | /* partial write */
|
---|
1236 | err = ERR_OK;
|
---|
1237 | conn->current_msg->msg.w.len = conn->write_offset;
|
---|
1238 | }
|
---|
1239 | } else
|
---|
1240 | #endif /* LWIP_SO_SNDTIMEO */
|
---|
1241 | {
|
---|
1242 | dataptr = (u8_t*)conn->current_msg->msg.w.dataptr + conn->write_offset;
|
---|
1243 | diff = conn->current_msg->msg.w.len - conn->write_offset;
|
---|
1244 | if (diff > 0xffffUL) { /* max_u16_t */
|
---|
1245 | len = 0xffff;
|
---|
1246 | #if LWIP_TCPIP_CORE_LOCKING
|
---|
1247 | conn->flags |= NETCONN_FLAG_WRITE_DELAYED;
|
---|
1248 | #endif
|
---|
1249 | apiflags |= TCP_WRITE_FLAG_MORE;
|
---|
1250 | } else {
|
---|
1251 | len = (u16_t)diff;
|
---|
1252 | }
|
---|
1253 | available = tcp_sndbuf(conn->pcb.tcp);
|
---|
1254 | if (available < len) {
|
---|
1255 | /* don't try to write more than sendbuf */
|
---|
1256 | len = available;
|
---|
1257 | if (dontblock){
|
---|
1258 | if (!len) {
|
---|
1259 | err = ERR_WOULDBLOCK;
|
---|
1260 | goto err_mem;
|
---|
1261 | }
|
---|
1262 | } else {
|
---|
1263 | #if LWIP_TCPIP_CORE_LOCKING
|
---|
1264 | conn->flags |= NETCONN_FLAG_WRITE_DELAYED;
|
---|
1265 | #endif
|
---|
1266 | apiflags |= TCP_WRITE_FLAG_MORE;
|
---|
1267 | }
|
---|
1268 | }
|
---|
1269 | LWIP_ASSERT("do_writemore: invalid length!", ((conn->write_offset + len) <= conn->current_msg->msg.w.len));
|
---|
1270 | err = tcp_write(conn->pcb.tcp, dataptr, len, apiflags);
|
---|
1271 | /* if OK or memory error, check available space */
|
---|
1272 | if ((err == ERR_OK) || (err == ERR_MEM)) {
|
---|
1273 | err_mem:
|
---|
1274 | if (dontblock && (len < conn->current_msg->msg.w.len)) {
|
---|
1275 | /* non-blocking write did not write everything: mark the pcb non-writable
|
---|
1276 | and let poll_tcp check writable space to mark the pcb writable again */
|
---|
1277 | API_EVENT(conn, NETCONN_EVT_SENDMINUS, len);
|
---|
1278 | conn->flags |= NETCONN_FLAG_CHECK_WRITESPACE;
|
---|
1279 | } else if ((tcp_sndbuf(conn->pcb.tcp) <= TCP_SNDLOWAT) ||
|
---|
1280 | (tcp_sndqueuelen(conn->pcb.tcp) >= TCP_SNDQUEUELOWAT)) {
|
---|
1281 | /* The queued byte- or pbuf-count exceeds the configured low-water limit,
|
---|
1282 | let select mark this pcb as non-writable. */
|
---|
1283 | API_EVENT(conn, NETCONN_EVT_SENDMINUS, len);
|
---|
1284 | }
|
---|
1285 | }
|
---|
1286 |
|
---|
1287 | if (err == ERR_OK) {
|
---|
1288 | conn->write_offset += len;
|
---|
1289 | if ((conn->write_offset == conn->current_msg->msg.w.len) || dontblock) {
|
---|
1290 | /* return sent length */
|
---|
1291 | conn->current_msg->msg.w.len = conn->write_offset;
|
---|
1292 | /* everything was written */
|
---|
1293 | write_finished = 1;
|
---|
1294 | conn->write_offset = 0;
|
---|
1295 | }
|
---|
1296 | tcp_output(conn->pcb.tcp);
|
---|
1297 | } else if ((err == ERR_MEM) && !dontblock) {
|
---|
1298 | /* If ERR_MEM, we wait for sent_tcp or poll_tcp to be called
|
---|
1299 | we do NOT return to the application thread, since ERR_MEM is
|
---|
1300 | only a temporary error! */
|
---|
1301 |
|
---|
1302 | /* tcp_write returned ERR_MEM, try tcp_output anyway */
|
---|
1303 | tcp_output(conn->pcb.tcp);
|
---|
1304 |
|
---|
1305 | #if LWIP_TCPIP_CORE_LOCKING
|
---|
1306 | conn->flags |= NETCONN_FLAG_WRITE_DELAYED;
|
---|
1307 | #endif
|
---|
1308 | } else {
|
---|
1309 | /* On errors != ERR_MEM, we don't try writing any more but return
|
---|
1310 | the error to the application thread. */
|
---|
1311 | write_finished = 1;
|
---|
1312 | conn->current_msg->msg.w.len = 0;
|
---|
1313 | }
|
---|
1314 | }
|
---|
1315 | if (write_finished) {
|
---|
1316 | /* everything was written: set back connection state
|
---|
1317 | and back to application task */
|
---|
1318 | conn->current_msg->err = err;
|
---|
1319 | conn->current_msg = NULL;
|
---|
1320 | conn->state = NETCONN_NONE;
|
---|
1321 | #if LWIP_TCPIP_CORE_LOCKING
|
---|
1322 | if ((conn->flags & NETCONN_FLAG_WRITE_DELAYED) != 0)
|
---|
1323 | #endif
|
---|
1324 | {
|
---|
1325 | sys_sem_signal(&conn->op_completed);
|
---|
1326 | }
|
---|
1327 | }
|
---|
1328 | #if LWIP_TCPIP_CORE_LOCKING
|
---|
1329 | else
|
---|
1330 | return ERR_MEM;
|
---|
1331 | #endif
|
---|
1332 | return ERR_OK;
|
---|
1333 | }
|
---|
1334 | #endif /* LWIP_TCP */
|
---|
1335 |
|
---|
1336 | /**
|
---|
1337 | * Send some data on a TCP pcb contained in a netconn
|
---|
1338 | * Called from netconn_write
|
---|
1339 | *
|
---|
1340 | * @param msg the api_msg_msg pointing to the connection
|
---|
1341 | */
|
---|
1342 | void
|
---|
1343 | do_write(struct api_msg_msg *msg)
|
---|
1344 | {
|
---|
1345 | if (ERR_IS_FATAL(msg->conn->last_err)) {
|
---|
1346 | msg->err = msg->conn->last_err;
|
---|
1347 | } else {
|
---|
1348 | if (msg->conn->type == NETCONN_TCP) {
|
---|
1349 | #if LWIP_TCP
|
---|
1350 | if (msg->conn->state != NETCONN_NONE) {
|
---|
1351 | /* netconn is connecting, closing or in blocking write */
|
---|
1352 | msg->err = ERR_INPROGRESS;
|
---|
1353 | } else if (msg->conn->pcb.tcp != NULL) {
|
---|
1354 | msg->conn->state = NETCONN_WRITE;
|
---|
1355 | /* set all the variables used by do_writemore */
|
---|
1356 | LWIP_ASSERT("already writing or closing", msg->conn->current_msg == NULL &&
|
---|
1357 | msg->conn->write_offset == 0);
|
---|
1358 | LWIP_ASSERT("msg->msg.w.len != 0", msg->msg.w.len != 0);
|
---|
1359 | msg->conn->current_msg = msg;
|
---|
1360 | msg->conn->write_offset = 0;
|
---|
1361 | #if LWIP_TCPIP_CORE_LOCKING
|
---|
1362 | msg->conn->flags &= ~NETCONN_FLAG_WRITE_DELAYED;
|
---|
1363 | if (do_writemore(msg->conn) != ERR_OK) {
|
---|
1364 | LWIP_ASSERT("state!", msg->conn->state == NETCONN_WRITE);
|
---|
1365 | UNLOCK_TCPIP_CORE();
|
---|
1366 | sys_arch_sem_wait(&msg->conn->op_completed, 0);
|
---|
1367 | LOCK_TCPIP_CORE();
|
---|
1368 | LWIP_ASSERT("state!", msg->conn->state == NETCONN_NONE);
|
---|
1369 | }
|
---|
1370 | #else /* LWIP_TCPIP_CORE_LOCKING */
|
---|
1371 | do_writemore(msg->conn);
|
---|
1372 | #endif /* LWIP_TCPIP_CORE_LOCKING */
|
---|
1373 | /* for both cases: if do_writemore was called, don't ACK the APIMSG
|
---|
1374 | since do_writemore ACKs it! */
|
---|
1375 | return;
|
---|
1376 | } else {
|
---|
1377 | msg->err = ERR_CONN;
|
---|
1378 | }
|
---|
1379 | #else /* LWIP_TCP */
|
---|
1380 | msg->err = ERR_VAL;
|
---|
1381 | #endif /* LWIP_TCP */
|
---|
1382 | #if (LWIP_UDP || LWIP_RAW)
|
---|
1383 | } else {
|
---|
1384 | msg->err = ERR_VAL;
|
---|
1385 | #endif /* (LWIP_UDP || LWIP_RAW) */
|
---|
1386 | }
|
---|
1387 | }
|
---|
1388 | TCPIP_APIMSG_ACK(msg);
|
---|
1389 | }
|
---|
1390 |
|
---|
1391 | /**
|
---|
1392 | * Return a connection's local or remote address
|
---|
1393 | * Called from netconn_getaddr
|
---|
1394 | *
|
---|
1395 | * @param msg the api_msg_msg pointing to the connection
|
---|
1396 | */
|
---|
1397 | void
|
---|
1398 | do_getaddr(struct api_msg_msg *msg)
|
---|
1399 | {
|
---|
1400 | if (msg->conn->pcb.ip != NULL) {
|
---|
1401 | *(msg->msg.ad.ipaddr) = (msg->msg.ad.local ? msg->conn->pcb.ip->local_ip :
|
---|
1402 | msg->conn->pcb.ip->remote_ip);
|
---|
1403 |
|
---|
1404 | msg->err = ERR_OK;
|
---|
1405 | switch (NETCONNTYPE_GROUP(msg->conn->type)) {
|
---|
1406 | #if LWIP_RAW
|
---|
1407 | case NETCONN_RAW:
|
---|
1408 | if (msg->msg.ad.local) {
|
---|
1409 | *(msg->msg.ad.port) = msg->conn->pcb.raw->protocol;
|
---|
1410 | } else {
|
---|
1411 | /* return an error as connecting is only a helper for upper layers */
|
---|
1412 | msg->err = ERR_CONN;
|
---|
1413 | }
|
---|
1414 | break;
|
---|
1415 | #endif /* LWIP_RAW */
|
---|
1416 | #if LWIP_UDP
|
---|
1417 | case NETCONN_UDP:
|
---|
1418 | if (msg->msg.ad.local) {
|
---|
1419 | *(msg->msg.ad.port) = msg->conn->pcb.udp->local_port;
|
---|
1420 | } else {
|
---|
1421 | if ((msg->conn->pcb.udp->flags & UDP_FLAGS_CONNECTED) == 0) {
|
---|
1422 | msg->err = ERR_CONN;
|
---|
1423 | } else {
|
---|
1424 | *(msg->msg.ad.port) = msg->conn->pcb.udp->remote_port;
|
---|
1425 | }
|
---|
1426 | }
|
---|
1427 | break;
|
---|
1428 | #endif /* LWIP_UDP */
|
---|
1429 | #if LWIP_TCP
|
---|
1430 | case NETCONN_TCP:
|
---|
1431 | *(msg->msg.ad.port) = (msg->msg.ad.local?msg->conn->pcb.tcp->local_port:msg->conn->pcb.tcp->remote_port);
|
---|
1432 | break;
|
---|
1433 | #endif /* LWIP_TCP */
|
---|
1434 | default:
|
---|
1435 | LWIP_ASSERT("invalid netconn_type", 0);
|
---|
1436 | break;
|
---|
1437 | }
|
---|
1438 | } else {
|
---|
1439 | msg->err = ERR_CONN;
|
---|
1440 | }
|
---|
1441 | TCPIP_APIMSG_ACK(msg);
|
---|
1442 | }
|
---|
1443 |
|
---|
1444 | /**
|
---|
1445 | * Close a TCP pcb contained in a netconn
|
---|
1446 | * Called from netconn_close
|
---|
1447 | *
|
---|
1448 | * @param msg the api_msg_msg pointing to the connection
|
---|
1449 | */
|
---|
1450 | void
|
---|
1451 | do_close(struct api_msg_msg *msg)
|
---|
1452 | {
|
---|
1453 | #if LWIP_TCP
|
---|
1454 | /* @todo: abort running write/connect? */
|
---|
1455 | if ((msg->conn->state != NETCONN_NONE) && (msg->conn->state != NETCONN_LISTEN)) {
|
---|
1456 | /* this only happens for TCP netconns */
|
---|
1457 | LWIP_ASSERT("msg->conn->type == NETCONN_TCP", msg->conn->type == NETCONN_TCP);
|
---|
1458 | msg->err = ERR_INPROGRESS;
|
---|
1459 | } else if ((msg->conn->pcb.tcp != NULL) && (msg->conn->type == NETCONN_TCP)) {
|
---|
1460 | if ((msg->msg.sd.shut != NETCONN_SHUT_RDWR) && (msg->conn->state == NETCONN_LISTEN)) {
|
---|
1461 | /* LISTEN doesn't support half shutdown */
|
---|
1462 | msg->err = ERR_CONN;
|
---|
1463 | } else {
|
---|
1464 | if (msg->msg.sd.shut & NETCONN_SHUT_RD) {
|
---|
1465 | /* Drain and delete mboxes */
|
---|
1466 | netconn_drain(msg->conn);
|
---|
1467 | }
|
---|
1468 | LWIP_ASSERT("already writing or closing", msg->conn->current_msg == NULL &&
|
---|
1469 | msg->conn->write_offset == 0);
|
---|
1470 | msg->conn->state = NETCONN_CLOSE;
|
---|
1471 | msg->conn->current_msg = msg;
|
---|
1472 | do_close_internal(msg->conn);
|
---|
1473 | /* for tcp netconns, do_close_internal ACKs the message */
|
---|
1474 | return;
|
---|
1475 | }
|
---|
1476 | } else
|
---|
1477 | #endif /* LWIP_TCP */
|
---|
1478 | {
|
---|
1479 | msg->err = ERR_VAL;
|
---|
1480 | }
|
---|
1481 | sys_sem_signal(&msg->conn->op_completed);
|
---|
1482 | }
|
---|
1483 |
|
---|
1484 | #if LWIP_IGMP
|
---|
1485 | /**
|
---|
1486 | * Join multicast groups for UDP netconns.
|
---|
1487 | * Called from netconn_join_leave_group
|
---|
1488 | *
|
---|
1489 | * @param msg the api_msg_msg pointing to the connection
|
---|
1490 | */
|
---|
1491 | void
|
---|
1492 | do_join_leave_group(struct api_msg_msg *msg)
|
---|
1493 | {
|
---|
1494 | if (ERR_IS_FATAL(msg->conn->last_err)) {
|
---|
1495 | msg->err = msg->conn->last_err;
|
---|
1496 | } else {
|
---|
1497 | if (msg->conn->pcb.tcp != NULL) {
|
---|
1498 | if (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_UDP) {
|
---|
1499 | #if LWIP_UDP
|
---|
1500 | if (msg->msg.jl.join_or_leave == NETCONN_JOIN) {
|
---|
1501 | msg->err = igmp_joingroup(msg->msg.jl.netif_addr, msg->msg.jl.multiaddr);
|
---|
1502 | } else {
|
---|
1503 | msg->err = igmp_leavegroup(msg->msg.jl.netif_addr, msg->msg.jl.multiaddr);
|
---|
1504 | }
|
---|
1505 | #endif /* LWIP_UDP */
|
---|
1506 | #if (LWIP_TCP || LWIP_RAW)
|
---|
1507 | } else {
|
---|
1508 | msg->err = ERR_VAL;
|
---|
1509 | #endif /* (LWIP_TCP || LWIP_RAW) */
|
---|
1510 | }
|
---|
1511 | } else {
|
---|
1512 | msg->err = ERR_CONN;
|
---|
1513 | }
|
---|
1514 | }
|
---|
1515 | TCPIP_APIMSG_ACK(msg);
|
---|
1516 | }
|
---|
1517 | #endif /* LWIP_IGMP */
|
---|
1518 |
|
---|
1519 | #if LWIP_DNS
|
---|
1520 | /**
|
---|
1521 | * Callback function that is called when DNS name is resolved
|
---|
1522 | * (or on timeout). A waiting application thread is waked up by
|
---|
1523 | * signaling the semaphore.
|
---|
1524 | */
|
---|
1525 | static void
|
---|
1526 | do_dns_found(const char *name, ip_addr_t *ipaddr, void *arg)
|
---|
1527 | {
|
---|
1528 | struct dns_api_msg *msg = (struct dns_api_msg*)arg;
|
---|
1529 |
|
---|
1530 | LWIP_ASSERT("DNS response for wrong host name", strcmp(msg->name, name) == 0);
|
---|
1531 | LWIP_UNUSED_ARG(name);
|
---|
1532 |
|
---|
1533 | if (ipaddr == NULL) {
|
---|
1534 | /* timeout or memory error */
|
---|
1535 | *msg->err = ERR_VAL;
|
---|
1536 | } else {
|
---|
1537 | /* address was resolved */
|
---|
1538 | *msg->err = ERR_OK;
|
---|
1539 | *msg->addr = *ipaddr;
|
---|
1540 | }
|
---|
1541 | /* wake up the application task waiting in netconn_gethostbyname */
|
---|
1542 | sys_sem_signal(msg->sem);
|
---|
1543 | }
|
---|
1544 |
|
---|
1545 | /**
|
---|
1546 | * Execute a DNS query
|
---|
1547 | * Called from netconn_gethostbyname
|
---|
1548 | *
|
---|
1549 | * @param arg the dns_api_msg pointing to the query
|
---|
1550 | */
|
---|
1551 | void
|
---|
1552 | do_gethostbyname(void *arg)
|
---|
1553 | {
|
---|
1554 | struct dns_api_msg *msg = (struct dns_api_msg*)arg;
|
---|
1555 |
|
---|
1556 | *msg->err = dns_gethostbyname(msg->name, msg->addr, do_dns_found, msg);
|
---|
1557 | if (*msg->err != ERR_INPROGRESS) {
|
---|
1558 | /* on error or immediate success, wake up the application
|
---|
1559 | * task waiting in netconn_gethostbyname */
|
---|
1560 | sys_sem_signal(msg->sem);
|
---|
1561 | }
|
---|
1562 | }
|
---|
1563 | #endif /* LWIP_DNS */
|
---|
1564 |
|
---|
1565 | #endif /* LWIP_NETCONN */
|
---|