[164] | 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
|
---|
| 411 | */
|
---|
| 412 | static void
|
---|
| 413 | setup_tcp(struct netconn *conn)
|
---|
| 414 | {
|
---|
| 415 | struct tcp_pcb *pcb;
|
---|
| 416 |
|
---|
| 417 | pcb = conn->pcb.tcp;
|
---|
| 418 | tcp_arg(pcb, conn);
|
---|
| 419 | tcp_recv(pcb, recv_tcp);
|
---|
| 420 | tcp_sent(pcb, sent_tcp);
|
---|
| 421 | tcp_poll(pcb, poll_tcp, 4);
|
---|
| 422 | tcp_err(pcb, err_tcp);
|
---|
| 423 | }
|
---|
| 424 |
|
---|
| 425 | /**
|
---|
| 426 | * Accept callback function for TCP netconns.
|
---|
| 427 | * Allocates a new netconn and posts that to conn->acceptmbox.
|
---|
| 428 | *
|
---|
| 429 | * @see tcp.h (struct tcp_pcb_listen.accept) for parameters and return value
|
---|
| 430 | */
|
---|
| 431 | static err_t
|
---|
| 432 | accept_function(void *arg, struct tcp_pcb *newpcb, err_t err)
|
---|
| 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 */
|
---|