[457] | 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/priv/api_msg.h"
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| 44 |
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| 45 | #include "lwip/ip.h"
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| 46 | #include "lwip/ip_addr.h"
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| 47 | #include "lwip/udp.h"
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| 48 | #include "lwip/tcp.h"
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| 49 | #include "lwip/raw.h"
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| 50 |
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| 51 | #include "lwip/memp.h"
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| 52 | #include "lwip/igmp.h"
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| 53 | #include "lwip/dns.h"
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| 54 | #include "lwip/mld6.h"
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| 55 | #include "lwip/priv/tcpip_priv.h"
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| 56 |
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| 57 | #include <string.h>
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| 58 |
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| 59 | /* netconns are polled once per second (e.g. continue write on memory error) */
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| 60 | #define NETCONN_TCP_POLL_INTERVAL 2
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| 61 |
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| 62 | #define SET_NONBLOCKING_CONNECT(conn, val) do { if (val) { \
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| 63 | netconn_set_flags(conn, NETCONN_FLAG_IN_NONBLOCKING_CONNECT); \
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| 64 | } else { \
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| 65 | netconn_clear_flags(conn, NETCONN_FLAG_IN_NONBLOCKING_CONNECT); }} while(0)
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| 66 | #define IN_NONBLOCKING_CONNECT(conn) netconn_is_flag_set(conn, NETCONN_FLAG_IN_NONBLOCKING_CONNECT)
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| 67 |
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| 68 | #if LWIP_NETCONN_FULLDUPLEX
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| 69 | #define NETCONN_MBOX_VALID(conn, mbox) (sys_mbox_valid(mbox) && ((conn->flags & NETCONN_FLAG_MBOXINVALID) == 0))
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| 70 | #else
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| 71 | #define NETCONN_MBOX_VALID(conn, mbox) sys_mbox_valid(mbox)
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| 72 | #endif
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| 73 |
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| 74 | /* forward declarations */
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| 75 | #if LWIP_TCP
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| 76 | #if LWIP_TCPIP_CORE_LOCKING
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| 77 | #define WRITE_DELAYED , 1
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| 78 | #define WRITE_DELAYED_PARAM , u8_t delayed
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| 79 | #else /* LWIP_TCPIP_CORE_LOCKING */
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| 80 | #define WRITE_DELAYED
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| 81 | #define WRITE_DELAYED_PARAM
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| 82 | #endif /* LWIP_TCPIP_CORE_LOCKING */
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| 83 | static err_t lwip_netconn_do_writemore(struct netconn *conn WRITE_DELAYED_PARAM);
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| 84 | static err_t lwip_netconn_do_close_internal(struct netconn *conn WRITE_DELAYED_PARAM);
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| 85 | #endif
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| 86 |
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| 87 | static void netconn_drain(struct netconn *conn);
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| 88 |
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| 89 | #if LWIP_TCPIP_CORE_LOCKING
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| 90 | #define TCPIP_APIMSG_ACK(m)
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| 91 | #else /* LWIP_TCPIP_CORE_LOCKING */
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| 92 | #define TCPIP_APIMSG_ACK(m) do { sys_sem_signal(LWIP_API_MSG_SEM(m)); } while(0)
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| 93 | #endif /* LWIP_TCPIP_CORE_LOCKING */
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| 94 |
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| 95 | #if LWIP_NETCONN_FULLDUPLEX
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| 96 | const u8_t netconn_deleted = 0;
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| 97 |
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| 98 | int
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| 99 | lwip_netconn_is_deallocated_msg(void *msg)
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| 100 | {
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| 101 | if (msg == &netconn_deleted) {
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| 102 | return 1;
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| 103 | }
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| 104 | return 0;
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| 105 | }
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| 106 | #endif /* LWIP_NETCONN_FULLDUPLEX */
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| 107 |
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| 108 | #if LWIP_TCP
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| 109 | const u8_t netconn_aborted = 0;
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| 110 | const u8_t netconn_reset = 0;
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| 111 | const u8_t netconn_closed = 0;
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| 112 |
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| 113 | /** Translate an error to a unique void* passed via an mbox */
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| 114 | static void *
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| 115 | lwip_netconn_err_to_msg(err_t err)
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| 116 | {
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| 117 | switch (err) {
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| 118 | case ERR_ABRT:
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| 119 | return LWIP_CONST_CAST(void *, &netconn_aborted);
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| 120 | case ERR_RST:
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| 121 | return LWIP_CONST_CAST(void *, &netconn_reset);
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| 122 | case ERR_CLSD:
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| 123 | return LWIP_CONST_CAST(void *, &netconn_closed);
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| 124 | default:
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| 125 | LWIP_ASSERT("unhandled error", err == ERR_OK);
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| 126 | return NULL;
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| 127 | }
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| 128 | }
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| 129 |
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| 130 | int
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| 131 | lwip_netconn_is_err_msg(void *msg, err_t *err)
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| 132 | {
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| 133 | LWIP_ASSERT("err != NULL", err != NULL);
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| 134 |
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| 135 | if (msg == &netconn_aborted) {
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| 136 | *err = ERR_ABRT;
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| 137 | return 1;
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| 138 | } else if (msg == &netconn_reset) {
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| 139 | *err = ERR_RST;
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| 140 | return 1;
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| 141 | } else if (msg == &netconn_closed) {
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| 142 | *err = ERR_CLSD;
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| 143 | return 1;
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| 144 | }
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| 145 | return 0;
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| 146 | }
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| 147 | #endif /* LWIP_TCP */
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| 148 |
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| 149 |
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| 150 | #if LWIP_RAW
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| 151 | /**
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| 152 | * Receive callback function for RAW netconns.
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| 153 | * Doesn't 'eat' the packet, only copies it and sends it to
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| 154 | * conn->recvmbox
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| 155 | *
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| 156 | * @see raw.h (struct raw_pcb.recv) for parameters and return value
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| 157 | */
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| 158 | static u8_t
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| 159 | recv_raw(void *arg, struct raw_pcb *pcb, struct pbuf *p,
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| 160 | const ip_addr_t *addr)
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| 161 | {
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| 162 | struct pbuf *q;
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| 163 | struct netbuf *buf;
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| 164 | struct netconn *conn;
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| 165 |
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| 166 | LWIP_UNUSED_ARG(addr);
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| 167 | conn = (struct netconn *)arg;
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| 168 |
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| 169 | if ((conn != NULL) && NETCONN_MBOX_VALID(conn, &conn->recvmbox)) {
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| 170 | #if LWIP_SO_RCVBUF
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| 171 | int recv_avail;
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| 172 | SYS_ARCH_GET(conn->recv_avail, recv_avail);
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| 173 | if ((recv_avail + (int)(p->tot_len)) > conn->recv_bufsize) {
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| 174 | return 0;
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| 175 | }
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| 176 | #endif /* LWIP_SO_RCVBUF */
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| 177 | /* copy the whole packet into new pbufs */
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| 178 | q = pbuf_clone(PBUF_RAW, PBUF_RAM, p);
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| 179 | if (q != NULL) {
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| 180 | u16_t len;
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| 181 | buf = (struct netbuf *)memp_malloc(MEMP_NETBUF);
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| 182 | if (buf == NULL) {
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| 183 | pbuf_free(q);
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| 184 | return 0;
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| 185 | }
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| 186 |
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| 187 | buf->p = q;
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| 188 | buf->ptr = q;
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| 189 | ip_addr_copy(buf->addr, *ip_current_src_addr());
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| 190 | buf->port = pcb->protocol;
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| 191 |
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| 192 | len = q->tot_len;
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| 193 | if (sys_mbox_trypost(&conn->recvmbox, buf) != ERR_OK) {
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| 194 | netbuf_delete(buf);
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| 195 | return 0;
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| 196 | } else {
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| 197 | #if LWIP_SO_RCVBUF
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| 198 | SYS_ARCH_INC(conn->recv_avail, len);
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| 199 | #endif /* LWIP_SO_RCVBUF */
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| 200 | /* Register event with callback */
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| 201 | API_EVENT(conn, NETCONN_EVT_RCVPLUS, len);
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| 202 | }
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| 203 | }
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| 204 | }
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| 205 |
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| 206 | return 0; /* do not eat the packet */
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| 207 | }
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| 208 | #endif /* LWIP_RAW*/
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| 209 |
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| 210 | #if LWIP_UDP
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| 211 | /**
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| 212 | * Receive callback function for UDP netconns.
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| 213 | * Posts the packet to conn->recvmbox or deletes it on memory error.
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| 214 | *
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| 215 | * @see udp.h (struct udp_pcb.recv) for parameters
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| 216 | */
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| 217 | static void
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| 218 | recv_udp(void *arg, struct udp_pcb *pcb, struct pbuf *p,
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| 219 | const ip_addr_t *addr, u16_t port)
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| 220 | {
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| 221 | struct netbuf *buf;
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| 222 | struct netconn *conn;
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| 223 | u16_t len;
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| 224 | #if LWIP_SO_RCVBUF
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| 225 | int recv_avail;
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| 226 | #endif /* LWIP_SO_RCVBUF */
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| 227 |
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| 228 | LWIP_UNUSED_ARG(pcb); /* only used for asserts... */
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| 229 | LWIP_ASSERT("recv_udp must have a pcb argument", pcb != NULL);
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| 230 | LWIP_ASSERT("recv_udp must have an argument", arg != NULL);
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| 231 | conn = (struct netconn *)arg;
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| 232 |
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| 233 | if (conn == NULL) {
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| 234 | pbuf_free(p);
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| 235 | return;
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| 236 | }
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| 237 |
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| 238 | LWIP_ASSERT("recv_udp: recv for wrong pcb!", conn->pcb.udp == pcb);
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| 239 |
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| 240 | #if LWIP_SO_RCVBUF
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| 241 | SYS_ARCH_GET(conn->recv_avail, recv_avail);
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| 242 | if (!NETCONN_MBOX_VALID(conn, &conn->recvmbox) ||
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| 243 | ((recv_avail + (int)(p->tot_len)) > conn->recv_bufsize)) {
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| 244 | #else /* LWIP_SO_RCVBUF */
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| 245 | if (!NETCONN_MBOX_VALID(conn, &conn->recvmbox)) {
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| 246 | #endif /* LWIP_SO_RCVBUF */
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| 247 | pbuf_free(p);
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| 248 | return;
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| 249 | }
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| 250 |
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| 251 | buf = (struct netbuf *)memp_malloc(MEMP_NETBUF);
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| 252 | if (buf == NULL) {
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| 253 | pbuf_free(p);
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| 254 | return;
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| 255 | } else {
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| 256 | buf->p = p;
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| 257 | buf->ptr = p;
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| 258 | ip_addr_set(&buf->addr, addr);
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| 259 | buf->port = port;
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| 260 | #if LWIP_NETBUF_RECVINFO
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| 261 | if (conn->flags & NETCONN_FLAG_PKTINFO) {
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| 262 | /* get the UDP header - always in the first pbuf, ensured by udp_input */
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| 263 | const struct udp_hdr *udphdr = (const struct udp_hdr *)ip_next_header_ptr();
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| 264 | buf->flags = NETBUF_FLAG_DESTADDR;
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| 265 | ip_addr_set(&buf->toaddr, ip_current_dest_addr());
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| 266 | buf->toport_chksum = udphdr->dest;
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| 267 | }
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| 268 | #endif /* LWIP_NETBUF_RECVINFO */
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| 269 | }
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| 270 |
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| 271 | len = p->tot_len;
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| 272 | if (sys_mbox_trypost(&conn->recvmbox, buf) != ERR_OK) {
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| 273 | netbuf_delete(buf);
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| 274 | return;
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| 275 | } else {
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| 276 | #if LWIP_SO_RCVBUF
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| 277 | SYS_ARCH_INC(conn->recv_avail, len);
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| 278 | #endif /* LWIP_SO_RCVBUF */
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| 279 | /* Register event with callback */
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| 280 | API_EVENT(conn, NETCONN_EVT_RCVPLUS, len);
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| 281 | }
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| 282 | }
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| 283 | #endif /* LWIP_UDP */
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| 284 |
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| 285 | #if LWIP_TCP
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| 286 | /**
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| 287 | * Receive callback function for TCP netconns.
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| 288 | * Posts the packet to conn->recvmbox, but doesn't delete it on errors.
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| 289 | *
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| 290 | * @see tcp.h (struct tcp_pcb.recv) for parameters and return value
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| 291 | */
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| 292 | static err_t
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| 293 | recv_tcp(void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err)
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| 294 | {
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| 295 | struct netconn *conn;
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| 296 | u16_t len;
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| 297 | void *msg;
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| 298 |
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| 299 | LWIP_UNUSED_ARG(pcb);
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| 300 | LWIP_ASSERT("recv_tcp must have a pcb argument", pcb != NULL);
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| 301 | LWIP_ASSERT("recv_tcp must have an argument", arg != NULL);
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| 302 | LWIP_ASSERT("err != ERR_OK unhandled", err == ERR_OK);
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| 303 | LWIP_UNUSED_ARG(err); /* for LWIP_NOASSERT */
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| 304 | conn = (struct netconn *)arg;
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| 305 |
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| 306 | if (conn == NULL) {
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| 307 | return ERR_VAL;
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| 308 | }
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| 309 | LWIP_ASSERT("recv_tcp: recv for wrong pcb!", conn->pcb.tcp == pcb);
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| 310 |
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| 311 | if (!NETCONN_MBOX_VALID(conn, &conn->recvmbox)) {
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| 312 | /* recvmbox already deleted */
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| 313 | if (p != NULL) {
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| 314 | tcp_recved(pcb, p->tot_len);
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| 315 | pbuf_free(p);
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| 316 | }
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| 317 | return ERR_OK;
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| 318 | }
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| 319 | /* Unlike for UDP or RAW pcbs, don't check for available space
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| 320 | using recv_avail since that could break the connection
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| 321 | (data is already ACKed) */
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| 322 |
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| 323 | if (p != NULL) {
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| 324 | msg = p;
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| 325 | len = p->tot_len;
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| 326 | } else {
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| 327 | msg = LWIP_CONST_CAST(void *, &netconn_closed);
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| 328 | len = 0;
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| 329 | }
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| 330 |
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| 331 | if (sys_mbox_trypost(&conn->recvmbox, msg) != ERR_OK) {
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| 332 | /* don't deallocate p: it is presented to us later again from tcp_fasttmr! */
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| 333 | return ERR_MEM;
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| 334 | } else {
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| 335 | #if LWIP_SO_RCVBUF
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| 336 | SYS_ARCH_INC(conn->recv_avail, len);
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| 337 | #endif /* LWIP_SO_RCVBUF */
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| 338 | /* Register event with callback */
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| 339 | API_EVENT(conn, NETCONN_EVT_RCVPLUS, len);
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| 340 | }
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| 341 |
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| 342 | return ERR_OK;
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| 343 | }
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| 344 |
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| 345 | /**
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| 346 | * Poll callback function for TCP netconns.
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| 347 | * Wakes up an application thread that waits for a connection to close
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| 348 | * or data to be sent. The application thread then takes the
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| 349 | * appropriate action to go on.
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| 350 | *
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| 351 | * Signals the conn->sem.
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| 352 | * netconn_close waits for conn->sem if closing failed.
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| 353 | *
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| 354 | * @see tcp.h (struct tcp_pcb.poll) for parameters and return value
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| 355 | */
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| 356 | static err_t
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| 357 | poll_tcp(void *arg, struct tcp_pcb *pcb)
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| 358 | {
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| 359 | struct netconn *conn = (struct netconn *)arg;
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| 360 |
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| 361 | LWIP_UNUSED_ARG(pcb);
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| 362 | LWIP_ASSERT("conn != NULL", (conn != NULL));
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| 363 |
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| 364 | if (conn->state == NETCONN_WRITE) {
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| 365 | lwip_netconn_do_writemore(conn WRITE_DELAYED);
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| 366 | } else if (conn->state == NETCONN_CLOSE) {
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| 367 | #if !LWIP_SO_SNDTIMEO && !LWIP_SO_LINGER
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| 368 | if (conn->current_msg && conn->current_msg->msg.sd.polls_left) {
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| 369 | conn->current_msg->msg.sd.polls_left--;
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| 370 | }
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| 371 | #endif /* !LWIP_SO_SNDTIMEO && !LWIP_SO_LINGER */
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| 372 | lwip_netconn_do_close_internal(conn WRITE_DELAYED);
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| 373 | }
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| 374 | /* @todo: implement connect timeout here? */
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| 375 |
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| 376 | /* Did a nonblocking write fail before? Then check available write-space. */
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| 377 | if (conn->flags & NETCONN_FLAG_CHECK_WRITESPACE) {
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| 378 | /* If the queued byte- or pbuf-count drops below the configured low-water limit,
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| 379 | let select mark this pcb as writable again. */
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| 380 | if ((conn->pcb.tcp != NULL) && (tcp_sndbuf(conn->pcb.tcp) > TCP_SNDLOWAT) &&
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| 381 | (tcp_sndqueuelen(conn->pcb.tcp) < TCP_SNDQUEUELOWAT)) {
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| 382 | netconn_clear_flags(conn, NETCONN_FLAG_CHECK_WRITESPACE);
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| 383 | API_EVENT(conn, NETCONN_EVT_SENDPLUS, 0);
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| 384 | }
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| 385 | }
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| 386 |
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| 387 | return ERR_OK;
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| 388 | }
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| 389 |
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| 390 | /**
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| 391 | * Sent callback function for TCP netconns.
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| 392 | * Signals the conn->sem and calls API_EVENT.
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| 393 | * netconn_write waits for conn->sem if send buffer is low.
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| 394 | *
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| 395 | * @see tcp.h (struct tcp_pcb.sent) for parameters and return value
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| 396 | */
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| 397 | static err_t
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| 398 | sent_tcp(void *arg, struct tcp_pcb *pcb, u16_t len)
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| 399 | {
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| 400 | struct netconn *conn = (struct netconn *)arg;
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| 401 |
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| 402 | LWIP_UNUSED_ARG(pcb);
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| 403 | LWIP_ASSERT("conn != NULL", (conn != NULL));
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| 404 |
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| 405 | if (conn) {
|
---|
| 406 | if (conn->state == NETCONN_WRITE) {
|
---|
| 407 | lwip_netconn_do_writemore(conn WRITE_DELAYED);
|
---|
| 408 | } else if (conn->state == NETCONN_CLOSE) {
|
---|
| 409 | lwip_netconn_do_close_internal(conn WRITE_DELAYED);
|
---|
| 410 | }
|
---|
| 411 |
|
---|
| 412 | /* If the queued byte- or pbuf-count drops below the configured low-water limit,
|
---|
| 413 | let select mark this pcb as writable again. */
|
---|
| 414 | if ((conn->pcb.tcp != NULL) && (tcp_sndbuf(conn->pcb.tcp) > TCP_SNDLOWAT) &&
|
---|
| 415 | (tcp_sndqueuelen(conn->pcb.tcp) < TCP_SNDQUEUELOWAT)) {
|
---|
| 416 | netconn_clear_flags(conn, NETCONN_FLAG_CHECK_WRITESPACE);
|
---|
| 417 | API_EVENT(conn, NETCONN_EVT_SENDPLUS, len);
|
---|
| 418 | }
|
---|
| 419 | }
|
---|
| 420 |
|
---|
| 421 | return ERR_OK;
|
---|
| 422 | }
|
---|
| 423 |
|
---|
| 424 | /**
|
---|
| 425 | * Error callback function for TCP netconns.
|
---|
| 426 | * Signals conn->sem, posts to all conn mboxes and calls API_EVENT.
|
---|
| 427 | * The application thread has then to decide what to do.
|
---|
| 428 | *
|
---|
| 429 | * @see tcp.h (struct tcp_pcb.err) for parameters
|
---|
| 430 | */
|
---|
| 431 | static void
|
---|
| 432 | err_tcp(void *arg, err_t err)
|
---|
| 433 | {
|
---|
| 434 | struct netconn *conn;
|
---|
| 435 | enum netconn_state old_state;
|
---|
| 436 | void *mbox_msg;
|
---|
| 437 | SYS_ARCH_DECL_PROTECT(lev);
|
---|
| 438 |
|
---|
| 439 | conn = (struct netconn *)arg;
|
---|
| 440 | LWIP_ASSERT("conn != NULL", (conn != NULL));
|
---|
| 441 |
|
---|
| 442 | SYS_ARCH_PROTECT(lev);
|
---|
| 443 |
|
---|
| 444 | /* when err is called, the pcb is deallocated, so delete the reference */
|
---|
| 445 | conn->pcb.tcp = NULL;
|
---|
| 446 | /* store pending error */
|
---|
| 447 | conn->pending_err = err;
|
---|
| 448 | /* prevent application threads from blocking on 'recvmbox'/'acceptmbox' */
|
---|
| 449 | conn->flags |= NETCONN_FLAG_MBOXCLOSED;
|
---|
| 450 |
|
---|
| 451 | /* reset conn->state now before waking up other threads */
|
---|
| 452 | old_state = conn->state;
|
---|
| 453 | conn->state = NETCONN_NONE;
|
---|
| 454 |
|
---|
| 455 | SYS_ARCH_UNPROTECT(lev);
|
---|
| 456 |
|
---|
| 457 | /* Notify the user layer about a connection error. Used to signal select. */
|
---|
| 458 | API_EVENT(conn, NETCONN_EVT_ERROR, 0);
|
---|
| 459 | /* Try to release selects pending on 'read' or 'write', too.
|
---|
| 460 | They will get an error if they actually try to read or write. */
|
---|
| 461 | API_EVENT(conn, NETCONN_EVT_RCVPLUS, 0);
|
---|
| 462 | API_EVENT(conn, NETCONN_EVT_SENDPLUS, 0);
|
---|
| 463 |
|
---|
| 464 | mbox_msg = lwip_netconn_err_to_msg(err);
|
---|
| 465 | /* pass error message to recvmbox to wake up pending recv */
|
---|
| 466 | if (NETCONN_MBOX_VALID(conn, &conn->recvmbox)) {
|
---|
| 467 | /* use trypost to prevent deadlock */
|
---|
| 468 | sys_mbox_trypost(&conn->recvmbox, mbox_msg);
|
---|
| 469 | }
|
---|
| 470 | /* pass error message to acceptmbox to wake up pending accept */
|
---|
| 471 | if (NETCONN_MBOX_VALID(conn, &conn->acceptmbox)) {
|
---|
| 472 | /* use trypost to preven deadlock */
|
---|
| 473 | sys_mbox_trypost(&conn->acceptmbox, mbox_msg);
|
---|
| 474 | }
|
---|
| 475 |
|
---|
| 476 | if ((old_state == NETCONN_WRITE) || (old_state == NETCONN_CLOSE) ||
|
---|
| 477 | (old_state == NETCONN_CONNECT)) {
|
---|
| 478 | /* calling lwip_netconn_do_writemore/lwip_netconn_do_close_internal is not necessary
|
---|
| 479 | since the pcb has already been deleted! */
|
---|
| 480 | int was_nonblocking_connect = IN_NONBLOCKING_CONNECT(conn);
|
---|
| 481 | SET_NONBLOCKING_CONNECT(conn, 0);
|
---|
| 482 |
|
---|
| 483 | if (!was_nonblocking_connect) {
|
---|
| 484 | sys_sem_t *op_completed_sem;
|
---|
| 485 | /* set error return code */
|
---|
| 486 | LWIP_ASSERT("conn->current_msg != NULL", conn->current_msg != NULL);
|
---|
| 487 | if (old_state == NETCONN_CLOSE) {
|
---|
| 488 | /* let close succeed: the connection is closed after all... */
|
---|
| 489 | conn->current_msg->err = ERR_OK;
|
---|
| 490 | } else {
|
---|
| 491 | /* Write and connect fail */
|
---|
| 492 | conn->current_msg->err = err;
|
---|
| 493 | }
|
---|
| 494 | op_completed_sem = LWIP_API_MSG_SEM(conn->current_msg);
|
---|
| 495 | LWIP_ASSERT("inavlid op_completed_sem", sys_sem_valid(op_completed_sem));
|
---|
| 496 | conn->current_msg = NULL;
|
---|
| 497 | /* wake up the waiting task */
|
---|
| 498 | sys_sem_signal(op_completed_sem);
|
---|
| 499 | } else {
|
---|
| 500 | /* @todo: test what happens for error on nonblocking connect */
|
---|
| 501 | }
|
---|
| 502 | } else {
|
---|
| 503 | LWIP_ASSERT("conn->current_msg == NULL", conn->current_msg == NULL);
|
---|
| 504 | }
|
---|
| 505 | }
|
---|
| 506 |
|
---|
| 507 | /**
|
---|
| 508 | * Setup a tcp_pcb with the correct callback function pointers
|
---|
| 509 | * and their arguments.
|
---|
| 510 | *
|
---|
| 511 | * @param conn the TCP netconn to setup
|
---|
| 512 | */
|
---|
| 513 | static void
|
---|
| 514 | setup_tcp(struct netconn *conn)
|
---|
| 515 | {
|
---|
| 516 | struct tcp_pcb *pcb;
|
---|
| 517 |
|
---|
| 518 | pcb = conn->pcb.tcp;
|
---|
| 519 | tcp_arg(pcb, conn);
|
---|
| 520 | tcp_recv(pcb, recv_tcp);
|
---|
| 521 | tcp_sent(pcb, sent_tcp);
|
---|
| 522 | tcp_poll(pcb, poll_tcp, NETCONN_TCP_POLL_INTERVAL);
|
---|
| 523 | tcp_err(pcb, err_tcp);
|
---|
| 524 | }
|
---|
| 525 |
|
---|
| 526 | /**
|
---|
| 527 | * Accept callback function for TCP netconns.
|
---|
| 528 | * Allocates a new netconn and posts that to conn->acceptmbox.
|
---|
| 529 | *
|
---|
| 530 | * @see tcp.h (struct tcp_pcb_listen.accept) for parameters and return value
|
---|
| 531 | */
|
---|
| 532 | static err_t
|
---|
| 533 | accept_function(void *arg, struct tcp_pcb *newpcb, err_t err)
|
---|
| 534 | {
|
---|
| 535 | struct netconn *newconn;
|
---|
| 536 | struct netconn *conn = (struct netconn *)arg;
|
---|
| 537 |
|
---|
| 538 | if (conn == NULL) {
|
---|
| 539 | return ERR_VAL;
|
---|
| 540 | }
|
---|
| 541 | if (!NETCONN_MBOX_VALID(conn, &conn->acceptmbox)) {
|
---|
| 542 | LWIP_DEBUGF(API_MSG_DEBUG, ("accept_function: acceptmbox already deleted\n"));
|
---|
| 543 | return ERR_VAL;
|
---|
| 544 | }
|
---|
| 545 |
|
---|
| 546 | if (newpcb == NULL) {
|
---|
| 547 | /* out-of-pcbs during connect: pass on this error to the application */
|
---|
| 548 | if (sys_mbox_trypost(&conn->acceptmbox, lwip_netconn_err_to_msg(ERR_ABRT)) == ERR_OK) {
|
---|
| 549 | /* Register event with callback */
|
---|
| 550 | API_EVENT(conn, NETCONN_EVT_RCVPLUS, 0);
|
---|
| 551 | }
|
---|
| 552 | return ERR_VAL;
|
---|
| 553 | }
|
---|
| 554 | LWIP_ASSERT("expect newpcb == NULL or err == ERR_OK", err == ERR_OK);
|
---|
| 555 | LWIP_UNUSED_ARG(err); /* for LWIP_NOASSERT */
|
---|
| 556 |
|
---|
| 557 | LWIP_DEBUGF(API_MSG_DEBUG, ("accept_function: newpcb->state: %s\n", tcp_debug_state_str(newpcb->state)));
|
---|
| 558 |
|
---|
| 559 | /* We have to set the callback here even though
|
---|
| 560 | * the new socket is unknown. newconn->socket is marked as -1. */
|
---|
| 561 | newconn = netconn_alloc(conn->type, conn->callback);
|
---|
| 562 | if (newconn == NULL) {
|
---|
| 563 | /* outof netconns: pass on this error to the application */
|
---|
| 564 | if (sys_mbox_trypost(&conn->acceptmbox, lwip_netconn_err_to_msg(ERR_ABRT)) == ERR_OK) {
|
---|
| 565 | /* Register event with callback */
|
---|
| 566 | API_EVENT(conn, NETCONN_EVT_RCVPLUS, 0);
|
---|
| 567 | }
|
---|
| 568 | return ERR_MEM;
|
---|
| 569 | }
|
---|
| 570 | newconn->pcb.tcp = newpcb;
|
---|
| 571 | setup_tcp(newconn);
|
---|
| 572 |
|
---|
| 573 | /* handle backlog counter */
|
---|
| 574 | tcp_backlog_delayed(newpcb);
|
---|
| 575 |
|
---|
| 576 | if (sys_mbox_trypost(&conn->acceptmbox, newconn) != ERR_OK) {
|
---|
| 577 | /* When returning != ERR_OK, the pcb is aborted in tcp_process(),
|
---|
| 578 | so do nothing here! */
|
---|
| 579 | /* remove all references to this netconn from the pcb */
|
---|
| 580 | struct tcp_pcb *pcb = newconn->pcb.tcp;
|
---|
| 581 | tcp_arg(pcb, NULL);
|
---|
| 582 | tcp_recv(pcb, NULL);
|
---|
| 583 | tcp_sent(pcb, NULL);
|
---|
| 584 | tcp_poll(pcb, NULL, 0);
|
---|
| 585 | tcp_err(pcb, NULL);
|
---|
| 586 | /* remove reference from to the pcb from this netconn */
|
---|
| 587 | newconn->pcb.tcp = NULL;
|
---|
| 588 | /* no need to drain since we know the recvmbox is empty. */
|
---|
| 589 | sys_mbox_free(&newconn->recvmbox);
|
---|
| 590 | sys_mbox_set_invalid(&newconn->recvmbox);
|
---|
| 591 | netconn_free(newconn);
|
---|
| 592 | return ERR_MEM;
|
---|
| 593 | } else {
|
---|
| 594 | /* Register event with callback */
|
---|
| 595 | API_EVENT(conn, NETCONN_EVT_RCVPLUS, 0);
|
---|
| 596 | }
|
---|
| 597 |
|
---|
| 598 | return ERR_OK;
|
---|
| 599 | }
|
---|
| 600 | #endif /* LWIP_TCP */
|
---|
| 601 |
|
---|
| 602 | /**
|
---|
| 603 | * Create a new pcb of a specific type.
|
---|
| 604 | * Called from lwip_netconn_do_newconn().
|
---|
| 605 | *
|
---|
| 606 | * @param msg the api_msg describing the connection type
|
---|
| 607 | */
|
---|
| 608 | static void
|
---|
| 609 | pcb_new(struct api_msg *msg)
|
---|
| 610 | {
|
---|
| 611 | enum lwip_ip_addr_type iptype = IPADDR_TYPE_V4;
|
---|
| 612 |
|
---|
| 613 | LWIP_ASSERT("pcb_new: pcb already allocated", msg->conn->pcb.tcp == NULL);
|
---|
| 614 |
|
---|
| 615 | #if LWIP_IPV6 && LWIP_IPV4
|
---|
| 616 | /* IPv6: Dual-stack by default, unless netconn_set_ipv6only() is called */
|
---|
| 617 | if (NETCONNTYPE_ISIPV6(netconn_type(msg->conn))) {
|
---|
| 618 | iptype = IPADDR_TYPE_ANY;
|
---|
| 619 | }
|
---|
| 620 | #endif
|
---|
| 621 |
|
---|
| 622 | /* Allocate a PCB for this connection */
|
---|
| 623 | switch (NETCONNTYPE_GROUP(msg->conn->type)) {
|
---|
| 624 | #if LWIP_RAW
|
---|
| 625 | case NETCONN_RAW:
|
---|
| 626 | msg->conn->pcb.raw = raw_new_ip_type(iptype, msg->msg.n.proto);
|
---|
| 627 | if (msg->conn->pcb.raw != NULL) {
|
---|
| 628 | #if LWIP_IPV6
|
---|
| 629 | /* ICMPv6 packets should always have checksum calculated by the stack as per RFC 3542 chapter 3.1 */
|
---|
| 630 | if (NETCONNTYPE_ISIPV6(msg->conn->type) && msg->conn->pcb.raw->protocol == IP6_NEXTH_ICMP6) {
|
---|
| 631 | msg->conn->pcb.raw->chksum_reqd = 1;
|
---|
| 632 | msg->conn->pcb.raw->chksum_offset = 2;
|
---|
| 633 | }
|
---|
| 634 | #endif /* LWIP_IPV6 */
|
---|
| 635 | raw_recv(msg->conn->pcb.raw, recv_raw, msg->conn);
|
---|
| 636 | }
|
---|
| 637 | break;
|
---|
| 638 | #endif /* LWIP_RAW */
|
---|
| 639 | #if LWIP_UDP
|
---|
| 640 | case NETCONN_UDP:
|
---|
| 641 | msg->conn->pcb.udp = udp_new_ip_type(iptype);
|
---|
| 642 | if (msg->conn->pcb.udp != NULL) {
|
---|
| 643 | #if LWIP_UDPLITE
|
---|
| 644 | if (NETCONNTYPE_ISUDPLITE(msg->conn->type)) {
|
---|
| 645 | udp_setflags(msg->conn->pcb.udp, UDP_FLAGS_UDPLITE);
|
---|
| 646 | }
|
---|
| 647 | #endif /* LWIP_UDPLITE */
|
---|
| 648 | if (NETCONNTYPE_ISUDPNOCHKSUM(msg->conn->type)) {
|
---|
| 649 | udp_setflags(msg->conn->pcb.udp, UDP_FLAGS_NOCHKSUM);
|
---|
| 650 | }
|
---|
| 651 | udp_recv(msg->conn->pcb.udp, recv_udp, msg->conn);
|
---|
| 652 | }
|
---|
| 653 | break;
|
---|
| 654 | #endif /* LWIP_UDP */
|
---|
| 655 | #if LWIP_TCP
|
---|
| 656 | case NETCONN_TCP:
|
---|
| 657 | msg->conn->pcb.tcp = tcp_new_ip_type(iptype);
|
---|
| 658 | if (msg->conn->pcb.tcp != NULL) {
|
---|
| 659 | setup_tcp(msg->conn);
|
---|
| 660 | }
|
---|
| 661 | break;
|
---|
| 662 | #endif /* LWIP_TCP */
|
---|
| 663 | default:
|
---|
| 664 | /* Unsupported netconn type, e.g. protocol disabled */
|
---|
| 665 | msg->err = ERR_VAL;
|
---|
| 666 | return;
|
---|
| 667 | }
|
---|
| 668 | if (msg->conn->pcb.ip == NULL) {
|
---|
| 669 | msg->err = ERR_MEM;
|
---|
| 670 | }
|
---|
| 671 | }
|
---|
| 672 |
|
---|
| 673 | /**
|
---|
| 674 | * Create a new pcb of a specific type inside a netconn.
|
---|
| 675 | * Called from netconn_new_with_proto_and_callback.
|
---|
| 676 | *
|
---|
| 677 | * @param m the api_msg describing the connection type
|
---|
| 678 | */
|
---|
| 679 | void
|
---|
| 680 | lwip_netconn_do_newconn(void *m)
|
---|
| 681 | {
|
---|
| 682 | struct api_msg *msg = (struct api_msg *)m;
|
---|
| 683 |
|
---|
| 684 | msg->err = ERR_OK;
|
---|
| 685 | if (msg->conn->pcb.tcp == NULL) {
|
---|
| 686 | pcb_new(msg);
|
---|
| 687 | }
|
---|
| 688 | /* Else? This "new" connection already has a PCB allocated. */
|
---|
| 689 | /* Is this an error condition? Should it be deleted? */
|
---|
| 690 | /* We currently just are happy and return. */
|
---|
| 691 |
|
---|
| 692 | TCPIP_APIMSG_ACK(msg);
|
---|
| 693 | }
|
---|
| 694 |
|
---|
| 695 | /**
|
---|
| 696 | * Create a new netconn (of a specific type) that has a callback function.
|
---|
| 697 | * The corresponding pcb is NOT created!
|
---|
| 698 | *
|
---|
| 699 | * @param t the type of 'connection' to create (@see enum netconn_type)
|
---|
| 700 | * @param callback a function to call on status changes (RX available, TX'ed)
|
---|
| 701 | * @return a newly allocated struct netconn or
|
---|
| 702 | * NULL on memory error
|
---|
| 703 | */
|
---|
| 704 | struct netconn *
|
---|
| 705 | netconn_alloc(enum netconn_type t, netconn_callback callback)
|
---|
| 706 | {
|
---|
| 707 | struct netconn *conn;
|
---|
| 708 | int size;
|
---|
| 709 | u8_t init_flags = 0;
|
---|
| 710 |
|
---|
| 711 | conn = (struct netconn *)memp_malloc(MEMP_NETCONN);
|
---|
| 712 | if (conn == NULL) {
|
---|
| 713 | return NULL;
|
---|
| 714 | }
|
---|
| 715 |
|
---|
| 716 | conn->pending_err = ERR_OK;
|
---|
| 717 | conn->type = t;
|
---|
| 718 | conn->pcb.tcp = NULL;
|
---|
| 719 |
|
---|
| 720 | /* If all sizes are the same, every compiler should optimize this switch to nothing */
|
---|
| 721 | switch (NETCONNTYPE_GROUP(t)) {
|
---|
| 722 | #if LWIP_RAW
|
---|
| 723 | case NETCONN_RAW:
|
---|
| 724 | size = DEFAULT_RAW_RECVMBOX_SIZE;
|
---|
| 725 | break;
|
---|
| 726 | #endif /* LWIP_RAW */
|
---|
| 727 | #if LWIP_UDP
|
---|
| 728 | case NETCONN_UDP:
|
---|
| 729 | size = DEFAULT_UDP_RECVMBOX_SIZE;
|
---|
| 730 | #if LWIP_NETBUF_RECVINFO
|
---|
| 731 | init_flags |= NETCONN_FLAG_PKTINFO;
|
---|
| 732 | #endif /* LWIP_NETBUF_RECVINFO */
|
---|
| 733 | break;
|
---|
| 734 | #endif /* LWIP_UDP */
|
---|
| 735 | #if LWIP_TCP
|
---|
| 736 | case NETCONN_TCP:
|
---|
| 737 | size = DEFAULT_TCP_RECVMBOX_SIZE;
|
---|
| 738 | break;
|
---|
| 739 | #endif /* LWIP_TCP */
|
---|
| 740 | default:
|
---|
| 741 | LWIP_ASSERT("netconn_alloc: undefined netconn_type", 0);
|
---|
| 742 | goto free_and_return;
|
---|
| 743 | }
|
---|
| 744 |
|
---|
| 745 | if (sys_mbox_new(&conn->recvmbox, size) != ERR_OK) {
|
---|
| 746 | goto free_and_return;
|
---|
| 747 | }
|
---|
| 748 | #if !LWIP_NETCONN_SEM_PER_THREAD
|
---|
| 749 | if (sys_sem_new(&conn->op_completed, 0) != ERR_OK) {
|
---|
| 750 | sys_mbox_free(&conn->recvmbox);
|
---|
| 751 | goto free_and_return;
|
---|
| 752 | }
|
---|
| 753 | #endif
|
---|
| 754 |
|
---|
| 755 | #if LWIP_TCP
|
---|
| 756 | sys_mbox_set_invalid(&conn->acceptmbox);
|
---|
| 757 | #endif
|
---|
| 758 | conn->state = NETCONN_NONE;
|
---|
| 759 | #if LWIP_SOCKET
|
---|
| 760 | /* initialize socket to -1 since 0 is a valid socket */
|
---|
| 761 | conn->socket = -1;
|
---|
| 762 | #endif /* LWIP_SOCKET */
|
---|
| 763 | conn->callback = callback;
|
---|
| 764 | #if LWIP_TCP
|
---|
| 765 | conn->current_msg = NULL;
|
---|
| 766 | #endif /* LWIP_TCP */
|
---|
| 767 | #if LWIP_SO_SNDTIMEO
|
---|
| 768 | conn->send_timeout = 0;
|
---|
| 769 | #endif /* LWIP_SO_SNDTIMEO */
|
---|
| 770 | #if LWIP_SO_RCVTIMEO
|
---|
| 771 | conn->recv_timeout = 0;
|
---|
| 772 | #endif /* LWIP_SO_RCVTIMEO */
|
---|
| 773 | #if LWIP_SO_RCVBUF
|
---|
| 774 | conn->recv_bufsize = RECV_BUFSIZE_DEFAULT;
|
---|
| 775 | conn->recv_avail = 0;
|
---|
| 776 | #endif /* LWIP_SO_RCVBUF */
|
---|
| 777 | #if LWIP_SO_LINGER
|
---|
| 778 | conn->linger = -1;
|
---|
| 779 | #endif /* LWIP_SO_LINGER */
|
---|
| 780 | conn->flags = init_flags;
|
---|
| 781 | return conn;
|
---|
| 782 | free_and_return:
|
---|
| 783 | memp_free(MEMP_NETCONN, conn);
|
---|
| 784 | return NULL;
|
---|
| 785 | }
|
---|
| 786 |
|
---|
| 787 | /**
|
---|
| 788 | * Delete a netconn and all its resources.
|
---|
| 789 | * The pcb is NOT freed (since we might not be in the right thread context do this).
|
---|
| 790 | *
|
---|
| 791 | * @param conn the netconn to free
|
---|
| 792 | */
|
---|
| 793 | void
|
---|
| 794 | netconn_free(struct netconn *conn)
|
---|
| 795 | {
|
---|
| 796 | LWIP_ASSERT("PCB must be deallocated outside this function", conn->pcb.tcp == NULL);
|
---|
| 797 |
|
---|
| 798 | #if LWIP_NETCONN_FULLDUPLEX
|
---|
| 799 | /* in fullduplex, netconn is drained here */
|
---|
| 800 | netconn_drain(conn);
|
---|
| 801 | #endif /* LWIP_NETCONN_FULLDUPLEX */
|
---|
| 802 |
|
---|
| 803 | LWIP_ASSERT("recvmbox must be deallocated before calling this function",
|
---|
| 804 | !sys_mbox_valid(&conn->recvmbox));
|
---|
| 805 | #if LWIP_TCP
|
---|
| 806 | LWIP_ASSERT("acceptmbox must be deallocated before calling this function",
|
---|
| 807 | !sys_mbox_valid(&conn->acceptmbox));
|
---|
| 808 | #endif /* LWIP_TCP */
|
---|
| 809 |
|
---|
| 810 | #if !LWIP_NETCONN_SEM_PER_THREAD
|
---|
| 811 | sys_sem_free(&conn->op_completed);
|
---|
| 812 | sys_sem_set_invalid(&conn->op_completed);
|
---|
| 813 | #endif
|
---|
| 814 |
|
---|
| 815 | memp_free(MEMP_NETCONN, conn);
|
---|
| 816 | }
|
---|
| 817 |
|
---|
| 818 | /**
|
---|
| 819 | * Delete rcvmbox and acceptmbox of a netconn and free the left-over data in
|
---|
| 820 | * these mboxes
|
---|
| 821 | *
|
---|
| 822 | * @param conn the netconn to free
|
---|
| 823 | * @bytes_drained bytes drained from recvmbox
|
---|
| 824 | * @accepts_drained pending connections drained from acceptmbox
|
---|
| 825 | */
|
---|
| 826 | static void
|
---|
| 827 | netconn_drain(struct netconn *conn)
|
---|
| 828 | {
|
---|
| 829 | void *mem;
|
---|
| 830 |
|
---|
| 831 | /* This runs when mbox and netconn are marked as closed,
|
---|
| 832 | so we don't need to lock against rx packets */
|
---|
| 833 | #if LWIP_NETCONN_FULLDUPLEX
|
---|
| 834 | LWIP_ASSERT("netconn marked closed", conn->flags & NETCONN_FLAG_MBOXINVALID);
|
---|
| 835 | #endif /* LWIP_NETCONN_FULLDUPLEX */
|
---|
| 836 |
|
---|
| 837 | /* Delete and drain the recvmbox. */
|
---|
| 838 | if (sys_mbox_valid(&conn->recvmbox)) {
|
---|
| 839 | while (sys_mbox_tryfetch(&conn->recvmbox, &mem) != SYS_MBOX_EMPTY) {
|
---|
| 840 | #if LWIP_NETCONN_FULLDUPLEX
|
---|
| 841 | if (!lwip_netconn_is_deallocated_msg(mem))
|
---|
| 842 | #endif /* LWIP_NETCONN_FULLDUPLEX */
|
---|
| 843 | {
|
---|
| 844 | #if LWIP_TCP
|
---|
| 845 | if (NETCONNTYPE_GROUP(conn->type) == NETCONN_TCP) {
|
---|
| 846 | err_t err;
|
---|
| 847 | if (!lwip_netconn_is_err_msg(mem, &err)) {
|
---|
| 848 | pbuf_free((struct pbuf *)mem);
|
---|
| 849 | }
|
---|
| 850 | } else
|
---|
| 851 | #endif /* LWIP_TCP */
|
---|
| 852 | {
|
---|
| 853 | netbuf_delete((struct netbuf *)mem);
|
---|
| 854 | }
|
---|
| 855 | }
|
---|
| 856 | }
|
---|
| 857 | sys_mbox_free(&conn->recvmbox);
|
---|
| 858 | sys_mbox_set_invalid(&conn->recvmbox);
|
---|
| 859 | }
|
---|
| 860 |
|
---|
| 861 | /* Delete and drain the acceptmbox. */
|
---|
| 862 | #if LWIP_TCP
|
---|
| 863 | if (sys_mbox_valid(&conn->acceptmbox)) {
|
---|
| 864 | while (sys_mbox_tryfetch(&conn->acceptmbox, &mem) != SYS_MBOX_EMPTY) {
|
---|
| 865 | #if LWIP_NETCONN_FULLDUPLEX
|
---|
| 866 | if (!lwip_netconn_is_deallocated_msg(mem))
|
---|
| 867 | #endif /* LWIP_NETCONN_FULLDUPLEX */
|
---|
| 868 | {
|
---|
| 869 | err_t err;
|
---|
| 870 | if (!lwip_netconn_is_err_msg(mem, &err)) {
|
---|
| 871 | struct netconn *newconn = (struct netconn *)mem;
|
---|
| 872 | /* Only tcp pcbs have an acceptmbox, so no need to check conn->type */
|
---|
| 873 | /* pcb might be set to NULL already by err_tcp() */
|
---|
| 874 | /* drain recvmbox */
|
---|
| 875 | netconn_drain(newconn);
|
---|
| 876 | if (newconn->pcb.tcp != NULL) {
|
---|
| 877 | tcp_abort(newconn->pcb.tcp);
|
---|
| 878 | newconn->pcb.tcp = NULL;
|
---|
| 879 | }
|
---|
| 880 | netconn_free(newconn);
|
---|
| 881 | }
|
---|
| 882 | }
|
---|
| 883 | }
|
---|
| 884 | sys_mbox_free(&conn->acceptmbox);
|
---|
| 885 | sys_mbox_set_invalid(&conn->acceptmbox);
|
---|
| 886 | }
|
---|
| 887 | #endif /* LWIP_TCP */
|
---|
| 888 | }
|
---|
| 889 |
|
---|
| 890 | #if LWIP_NETCONN_FULLDUPLEX
|
---|
| 891 | static void
|
---|
| 892 | netconn_mark_mbox_invalid(struct netconn *conn)
|
---|
| 893 | {
|
---|
| 894 | int i, num_waiting;
|
---|
| 895 | void *msg = LWIP_CONST_CAST(void *, &netconn_deleted);
|
---|
| 896 |
|
---|
| 897 | /* Prevent new calls/threads from reading from the mbox */
|
---|
| 898 | conn->flags |= NETCONN_FLAG_MBOXINVALID;
|
---|
| 899 |
|
---|
| 900 | SYS_ARCH_LOCKED(num_waiting = conn->mbox_threads_waiting);
|
---|
| 901 | for (i = 0; i < num_waiting; i++) {
|
---|
| 902 | if (sys_mbox_valid_val(conn->recvmbox)) {
|
---|
| 903 | sys_mbox_trypost(&conn->recvmbox, msg);
|
---|
| 904 | } else {
|
---|
| 905 | sys_mbox_trypost(&conn->acceptmbox, msg);
|
---|
| 906 | }
|
---|
| 907 | }
|
---|
| 908 | }
|
---|
| 909 | #endif /* LWIP_NETCONN_FULLDUPLEX */
|
---|
| 910 |
|
---|
| 911 | #if LWIP_TCP
|
---|
| 912 | /**
|
---|
| 913 | * Internal helper function to close a TCP netconn: since this sometimes
|
---|
| 914 | * doesn't work at the first attempt, this function is called from multiple
|
---|
| 915 | * places.
|
---|
| 916 | *
|
---|
| 917 | * @param conn the TCP netconn to close
|
---|
| 918 | */
|
---|
| 919 | static err_t
|
---|
| 920 | lwip_netconn_do_close_internal(struct netconn *conn WRITE_DELAYED_PARAM)
|
---|
| 921 | {
|
---|
| 922 | err_t err;
|
---|
| 923 | u8_t shut, shut_rx, shut_tx, shut_close;
|
---|
| 924 | u8_t close_finished = 0;
|
---|
| 925 | struct tcp_pcb *tpcb;
|
---|
| 926 | #if LWIP_SO_LINGER
|
---|
| 927 | u8_t linger_wait_required = 0;
|
---|
| 928 | #endif /* LWIP_SO_LINGER */
|
---|
| 929 |
|
---|
| 930 | LWIP_ASSERT("invalid conn", (conn != NULL));
|
---|
| 931 | LWIP_ASSERT("this is for tcp netconns only", (NETCONNTYPE_GROUP(conn->type) == NETCONN_TCP));
|
---|
| 932 | LWIP_ASSERT("conn must be in state NETCONN_CLOSE", (conn->state == NETCONN_CLOSE));
|
---|
| 933 | LWIP_ASSERT("pcb already closed", (conn->pcb.tcp != NULL));
|
---|
| 934 | LWIP_ASSERT("conn->current_msg != NULL", conn->current_msg != NULL);
|
---|
| 935 |
|
---|
| 936 | tpcb = conn->pcb.tcp;
|
---|
| 937 | shut = conn->current_msg->msg.sd.shut;
|
---|
| 938 | shut_rx = shut & NETCONN_SHUT_RD;
|
---|
| 939 | shut_tx = shut & NETCONN_SHUT_WR;
|
---|
| 940 | /* shutting down both ends is the same as closing
|
---|
| 941 | (also if RD or WR side was shut down before already) */
|
---|
| 942 | if (shut == NETCONN_SHUT_RDWR) {
|
---|
| 943 | shut_close = 1;
|
---|
| 944 | } else if (shut_rx &&
|
---|
| 945 | ((tpcb->state == FIN_WAIT_1) ||
|
---|
| 946 | (tpcb->state == FIN_WAIT_2) ||
|
---|
| 947 | (tpcb->state == CLOSING))) {
|
---|
| 948 | shut_close = 1;
|
---|
| 949 | } else if (shut_tx && ((tpcb->flags & TF_RXCLOSED) != 0)) {
|
---|
| 950 | shut_close = 1;
|
---|
| 951 | } else {
|
---|
| 952 | shut_close = 0;
|
---|
| 953 | }
|
---|
| 954 |
|
---|
| 955 | /* Set back some callback pointers */
|
---|
| 956 | if (shut_close) {
|
---|
| 957 | tcp_arg(tpcb, NULL);
|
---|
| 958 | }
|
---|
| 959 | if (tpcb->state == LISTEN) {
|
---|
| 960 | tcp_accept(tpcb, NULL);
|
---|
| 961 | } else {
|
---|
| 962 | /* some callbacks have to be reset if tcp_close is not successful */
|
---|
| 963 | if (shut_rx) {
|
---|
| 964 | tcp_recv(tpcb, NULL);
|
---|
| 965 | tcp_accept(tpcb, NULL);
|
---|
| 966 | }
|
---|
| 967 | if (shut_tx) {
|
---|
| 968 | tcp_sent(tpcb, NULL);
|
---|
| 969 | }
|
---|
| 970 | if (shut_close) {
|
---|
| 971 | tcp_poll(tpcb, NULL, 0);
|
---|
| 972 | tcp_err(tpcb, NULL);
|
---|
| 973 | }
|
---|
| 974 | }
|
---|
| 975 | /* Try to close the connection */
|
---|
| 976 | if (shut_close) {
|
---|
| 977 | #if LWIP_SO_LINGER
|
---|
| 978 | /* check linger possibilites before calling tcp_close */
|
---|
| 979 | err = ERR_OK;
|
---|
| 980 | /* linger enabled/required at all? (i.e. is there untransmitted data left?) */
|
---|
| 981 | if ((conn->linger >= 0) && (conn->pcb.tcp->unsent || conn->pcb.tcp->unacked)) {
|
---|
| 982 | if ((conn->linger == 0)) {
|
---|
| 983 | /* data left but linger prevents waiting */
|
---|
| 984 | tcp_abort(tpcb);
|
---|
| 985 | tpcb = NULL;
|
---|
| 986 | } else if (conn->linger > 0) {
|
---|
| 987 | /* data left and linger says we should wait */
|
---|
| 988 | if (netconn_is_nonblocking(conn)) {
|
---|
| 989 | /* data left on a nonblocking netconn -> cannot linger */
|
---|
| 990 | err = ERR_WOULDBLOCK;
|
---|
| 991 | } else if ((s32_t)(sys_now() - conn->current_msg->msg.sd.time_started) >=
|
---|
| 992 | (conn->linger * 1000)) {
|
---|
| 993 | /* data left but linger timeout has expired (this happens on further
|
---|
| 994 | calls to this function through poll_tcp */
|
---|
| 995 | tcp_abort(tpcb);
|
---|
| 996 | tpcb = NULL;
|
---|
| 997 | } else {
|
---|
| 998 | /* data left -> need to wait for ACK after successful close */
|
---|
| 999 | linger_wait_required = 1;
|
---|
| 1000 | }
|
---|
| 1001 | }
|
---|
| 1002 | }
|
---|
| 1003 | if ((err == ERR_OK) && (tpcb != NULL))
|
---|
| 1004 | #endif /* LWIP_SO_LINGER */
|
---|
| 1005 | {
|
---|
| 1006 | err = tcp_close(tpcb);
|
---|
| 1007 | }
|
---|
| 1008 | } else {
|
---|
| 1009 | err = tcp_shutdown(tpcb, shut_rx, shut_tx);
|
---|
| 1010 | }
|
---|
| 1011 | if (err == ERR_OK) {
|
---|
| 1012 | close_finished = 1;
|
---|
| 1013 | #if LWIP_SO_LINGER
|
---|
| 1014 | if (linger_wait_required) {
|
---|
| 1015 | /* wait for ACK of all unsent/unacked data by just getting called again */
|
---|
| 1016 | close_finished = 0;
|
---|
| 1017 | err = ERR_INPROGRESS;
|
---|
| 1018 | }
|
---|
| 1019 | #endif /* LWIP_SO_LINGER */
|
---|
| 1020 | } else {
|
---|
| 1021 | if (err == ERR_MEM) {
|
---|
| 1022 | /* Closing failed because of memory shortage, try again later. Even for
|
---|
| 1023 | nonblocking netconns, we have to wait since no standard socket application
|
---|
| 1024 | is prepared for close failing because of resource shortage.
|
---|
| 1025 | Check the timeout: this is kind of an lwip addition to the standard sockets:
|
---|
| 1026 | we wait for some time when failing to allocate a segment for the FIN */
|
---|
| 1027 | #if LWIP_SO_SNDTIMEO || LWIP_SO_LINGER
|
---|
| 1028 | s32_t close_timeout = LWIP_TCP_CLOSE_TIMEOUT_MS_DEFAULT;
|
---|
| 1029 | #if LWIP_SO_SNDTIMEO
|
---|
| 1030 | if (conn->send_timeout > 0) {
|
---|
| 1031 | close_timeout = conn->send_timeout;
|
---|
| 1032 | }
|
---|
| 1033 | #endif /* LWIP_SO_SNDTIMEO */
|
---|
| 1034 | #if LWIP_SO_LINGER
|
---|
| 1035 | if (conn->linger >= 0) {
|
---|
| 1036 | /* use linger timeout (seconds) */
|
---|
| 1037 | close_timeout = conn->linger * 1000U;
|
---|
| 1038 | }
|
---|
| 1039 | #endif
|
---|
| 1040 | if ((s32_t)(sys_now() - conn->current_msg->msg.sd.time_started) >= close_timeout) {
|
---|
| 1041 | #else /* LWIP_SO_SNDTIMEO || LWIP_SO_LINGER */
|
---|
| 1042 | if (conn->current_msg->msg.sd.polls_left == 0) {
|
---|
| 1043 | #endif /* LWIP_SO_SNDTIMEO || LWIP_SO_LINGER */
|
---|
| 1044 | close_finished = 1;
|
---|
| 1045 | if (shut_close) {
|
---|
| 1046 | /* in this case, we want to RST the connection */
|
---|
| 1047 | tcp_abort(tpcb);
|
---|
| 1048 | err = ERR_OK;
|
---|
| 1049 | }
|
---|
| 1050 | }
|
---|
| 1051 | } else {
|
---|
| 1052 | /* Closing failed for a non-memory error: give up */
|
---|
| 1053 | close_finished = 1;
|
---|
| 1054 | }
|
---|
| 1055 | }
|
---|
| 1056 | if (close_finished) {
|
---|
| 1057 | /* Closing done (succeeded, non-memory error, nonblocking error or timeout) */
|
---|
| 1058 | sys_sem_t *op_completed_sem = LWIP_API_MSG_SEM(conn->current_msg);
|
---|
| 1059 | conn->current_msg->err = err;
|
---|
| 1060 | conn->current_msg = NULL;
|
---|
| 1061 | conn->state = NETCONN_NONE;
|
---|
| 1062 | if (err == ERR_OK) {
|
---|
| 1063 | if (shut_close) {
|
---|
| 1064 | /* Set back some callback pointers as conn is going away */
|
---|
| 1065 | conn->pcb.tcp = NULL;
|
---|
| 1066 | /* Trigger select() in socket layer. Make sure everybody notices activity
|
---|
| 1067 | on the connection, error first! */
|
---|
| 1068 | API_EVENT(conn, NETCONN_EVT_ERROR, 0);
|
---|
| 1069 | }
|
---|
| 1070 | if (shut_rx) {
|
---|
| 1071 | API_EVENT(conn, NETCONN_EVT_RCVPLUS, 0);
|
---|
| 1072 | }
|
---|
| 1073 | if (shut_tx) {
|
---|
| 1074 | API_EVENT(conn, NETCONN_EVT_SENDPLUS, 0);
|
---|
| 1075 | }
|
---|
| 1076 | }
|
---|
| 1077 | #if LWIP_TCPIP_CORE_LOCKING
|
---|
| 1078 | if (delayed)
|
---|
| 1079 | #endif
|
---|
| 1080 | {
|
---|
| 1081 | /* wake up the application task */
|
---|
| 1082 | sys_sem_signal(op_completed_sem);
|
---|
| 1083 | }
|
---|
| 1084 | return ERR_OK;
|
---|
| 1085 | }
|
---|
| 1086 | if (!close_finished) {
|
---|
| 1087 | /* Closing failed and we want to wait: restore some of the callbacks */
|
---|
| 1088 | /* Closing of listen pcb will never fail! */
|
---|
| 1089 | LWIP_ASSERT("Closing a listen pcb may not fail!", (tpcb->state != LISTEN));
|
---|
| 1090 | if (shut_tx) {
|
---|
| 1091 | tcp_sent(tpcb, sent_tcp);
|
---|
| 1092 | }
|
---|
| 1093 | /* when waiting for close, set up poll interval to 500ms */
|
---|
| 1094 | tcp_poll(tpcb, poll_tcp, 1);
|
---|
| 1095 | tcp_err(tpcb, err_tcp);
|
---|
| 1096 | tcp_arg(tpcb, conn);
|
---|
| 1097 | /* don't restore recv callback: we don't want to receive any more data */
|
---|
| 1098 | }
|
---|
| 1099 | /* If closing didn't succeed, we get called again either
|
---|
| 1100 | from poll_tcp or from sent_tcp */
|
---|
| 1101 | LWIP_ASSERT("err != ERR_OK", err != ERR_OK);
|
---|
| 1102 | return err;
|
---|
| 1103 | }
|
---|
| 1104 | #endif /* LWIP_TCP */
|
---|
| 1105 |
|
---|
| 1106 | /**
|
---|
| 1107 | * Delete the pcb inside a netconn.
|
---|
| 1108 | * Called from netconn_delete.
|
---|
| 1109 | *
|
---|
| 1110 | * @param m the api_msg pointing to the connection
|
---|
| 1111 | */
|
---|
| 1112 | void
|
---|
| 1113 | lwip_netconn_do_delconn(void *m)
|
---|
| 1114 | {
|
---|
| 1115 | struct api_msg *msg = (struct api_msg *)m;
|
---|
| 1116 |
|
---|
| 1117 | enum netconn_state state = msg->conn->state;
|
---|
| 1118 | LWIP_ASSERT("netconn state error", /* this only happens for TCP netconns */
|
---|
| 1119 | (state == NETCONN_NONE) || (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_TCP));
|
---|
| 1120 | #if LWIP_NETCONN_FULLDUPLEX
|
---|
| 1121 | /* In full duplex mode, blocking write/connect is aborted with ERR_CLSD */
|
---|
| 1122 | if (state != NETCONN_NONE) {
|
---|
| 1123 | if ((state == NETCONN_WRITE) ||
|
---|
| 1124 | ((state == NETCONN_CONNECT) && !IN_NONBLOCKING_CONNECT(msg->conn))) {
|
---|
| 1125 | /* close requested, abort running write/connect */
|
---|
| 1126 | sys_sem_t *op_completed_sem;
|
---|
| 1127 | LWIP_ASSERT("msg->conn->current_msg != NULL", msg->conn->current_msg != NULL);
|
---|
| 1128 | op_completed_sem = LWIP_API_MSG_SEM(msg->conn->current_msg);
|
---|
| 1129 | msg->conn->current_msg->err = ERR_CLSD;
|
---|
| 1130 | msg->conn->current_msg = NULL;
|
---|
| 1131 | msg->conn->state = NETCONN_NONE;
|
---|
| 1132 | sys_sem_signal(op_completed_sem);
|
---|
| 1133 | }
|
---|
| 1134 | }
|
---|
| 1135 | #else /* LWIP_NETCONN_FULLDUPLEX */
|
---|
| 1136 | if (((state != NETCONN_NONE) &&
|
---|
| 1137 | (state != NETCONN_LISTEN) &&
|
---|
| 1138 | (state != NETCONN_CONNECT)) ||
|
---|
| 1139 | ((state == NETCONN_CONNECT) && !IN_NONBLOCKING_CONNECT(msg->conn))) {
|
---|
| 1140 | /* This means either a blocking write or blocking connect is running
|
---|
| 1141 | (nonblocking write returns and sets state to NONE) */
|
---|
| 1142 | msg->err = ERR_INPROGRESS;
|
---|
| 1143 | } else
|
---|
| 1144 | #endif /* LWIP_NETCONN_FULLDUPLEX */
|
---|
| 1145 | {
|
---|
| 1146 | LWIP_ASSERT("blocking connect in progress",
|
---|
| 1147 | (state != NETCONN_CONNECT) || IN_NONBLOCKING_CONNECT(msg->conn));
|
---|
| 1148 | msg->err = ERR_OK;
|
---|
| 1149 | #if LWIP_NETCONN_FULLDUPLEX
|
---|
| 1150 | /* Mark mboxes invalid */
|
---|
| 1151 | netconn_mark_mbox_invalid(msg->conn);
|
---|
| 1152 | #else /* LWIP_NETCONN_FULLDUPLEX */
|
---|
| 1153 | netconn_drain(msg->conn);
|
---|
| 1154 | #endif /* LWIP_NETCONN_FULLDUPLEX */
|
---|
| 1155 |
|
---|
| 1156 | if (msg->conn->pcb.tcp != NULL) {
|
---|
| 1157 |
|
---|
| 1158 | switch (NETCONNTYPE_GROUP(msg->conn->type)) {
|
---|
| 1159 | #if LWIP_RAW
|
---|
| 1160 | case NETCONN_RAW:
|
---|
| 1161 | raw_remove(msg->conn->pcb.raw);
|
---|
| 1162 | break;
|
---|
| 1163 | #endif /* LWIP_RAW */
|
---|
| 1164 | #if LWIP_UDP
|
---|
| 1165 | case NETCONN_UDP:
|
---|
| 1166 | msg->conn->pcb.udp->recv_arg = NULL;
|
---|
| 1167 | udp_remove(msg->conn->pcb.udp);
|
---|
| 1168 | break;
|
---|
| 1169 | #endif /* LWIP_UDP */
|
---|
| 1170 | #if LWIP_TCP
|
---|
| 1171 | case NETCONN_TCP:
|
---|
| 1172 | LWIP_ASSERT("already writing or closing", msg->conn->current_msg == NULL);
|
---|
| 1173 | msg->conn->state = NETCONN_CLOSE;
|
---|
| 1174 | msg->msg.sd.shut = NETCONN_SHUT_RDWR;
|
---|
| 1175 | msg->conn->current_msg = msg;
|
---|
| 1176 | #if LWIP_TCPIP_CORE_LOCKING
|
---|
| 1177 | if (lwip_netconn_do_close_internal(msg->conn, 0) != ERR_OK) {
|
---|
| 1178 | LWIP_ASSERT("state!", msg->conn->state == NETCONN_CLOSE);
|
---|
| 1179 | UNLOCK_TCPIP_CORE();
|
---|
| 1180 | sys_arch_sem_wait(LWIP_API_MSG_SEM(msg), 0);
|
---|
| 1181 | LOCK_TCPIP_CORE();
|
---|
| 1182 | LWIP_ASSERT("state!", msg->conn->state == NETCONN_NONE);
|
---|
| 1183 | }
|
---|
| 1184 | #else /* LWIP_TCPIP_CORE_LOCKING */
|
---|
| 1185 | lwip_netconn_do_close_internal(msg->conn);
|
---|
| 1186 | #endif /* LWIP_TCPIP_CORE_LOCKING */
|
---|
| 1187 | /* API_EVENT is called inside lwip_netconn_do_close_internal, before releasing
|
---|
| 1188 | the application thread, so we can return at this point! */
|
---|
| 1189 | return;
|
---|
| 1190 | #endif /* LWIP_TCP */
|
---|
| 1191 | default:
|
---|
| 1192 | break;
|
---|
| 1193 | }
|
---|
| 1194 | msg->conn->pcb.tcp = NULL;
|
---|
| 1195 | }
|
---|
| 1196 | /* tcp netconns don't come here! */
|
---|
| 1197 |
|
---|
| 1198 | /* @todo: this lets select make the socket readable and writable,
|
---|
| 1199 | which is wrong! errfd instead? */
|
---|
| 1200 | API_EVENT(msg->conn, NETCONN_EVT_RCVPLUS, 0);
|
---|
| 1201 | API_EVENT(msg->conn, NETCONN_EVT_SENDPLUS, 0);
|
---|
| 1202 | }
|
---|
| 1203 | if (sys_sem_valid(LWIP_API_MSG_SEM(msg))) {
|
---|
| 1204 | TCPIP_APIMSG_ACK(msg);
|
---|
| 1205 | }
|
---|
| 1206 | }
|
---|
| 1207 |
|
---|
| 1208 | /**
|
---|
| 1209 | * Bind a pcb contained in a netconn
|
---|
| 1210 | * Called from netconn_bind.
|
---|
| 1211 | *
|
---|
| 1212 | * @param m the api_msg pointing to the connection and containing
|
---|
| 1213 | * the IP address and port to bind to
|
---|
| 1214 | */
|
---|
| 1215 | void
|
---|
| 1216 | lwip_netconn_do_bind(void *m)
|
---|
| 1217 | {
|
---|
| 1218 | struct api_msg *msg = (struct api_msg *)m;
|
---|
| 1219 | err_t err;
|
---|
| 1220 |
|
---|
| 1221 | if (msg->conn->pcb.tcp != NULL) {
|
---|
| 1222 | switch (NETCONNTYPE_GROUP(msg->conn->type)) {
|
---|
| 1223 | #if LWIP_RAW
|
---|
| 1224 | case NETCONN_RAW:
|
---|
| 1225 | err = raw_bind(msg->conn->pcb.raw, API_EXPR_REF(msg->msg.bc.ipaddr));
|
---|
| 1226 | break;
|
---|
| 1227 | #endif /* LWIP_RAW */
|
---|
| 1228 | #if LWIP_UDP
|
---|
| 1229 | case NETCONN_UDP:
|
---|
| 1230 | err = udp_bind(msg->conn->pcb.udp, API_EXPR_REF(msg->msg.bc.ipaddr), msg->msg.bc.port);
|
---|
| 1231 | break;
|
---|
| 1232 | #endif /* LWIP_UDP */
|
---|
| 1233 | #if LWIP_TCP
|
---|
| 1234 | case NETCONN_TCP:
|
---|
| 1235 | err = tcp_bind(msg->conn->pcb.tcp, API_EXPR_REF(msg->msg.bc.ipaddr), msg->msg.bc.port);
|
---|
| 1236 | break;
|
---|
| 1237 | #endif /* LWIP_TCP */
|
---|
| 1238 | default:
|
---|
| 1239 | err = ERR_VAL;
|
---|
| 1240 | break;
|
---|
| 1241 | }
|
---|
| 1242 | } else {
|
---|
| 1243 | err = ERR_VAL;
|
---|
| 1244 | }
|
---|
| 1245 | msg->err = err;
|
---|
| 1246 | TCPIP_APIMSG_ACK(msg);
|
---|
| 1247 | }
|
---|
| 1248 | /**
|
---|
| 1249 | * Bind a pcb contained in a netconn to an interface
|
---|
| 1250 | * Called from netconn_bind_if.
|
---|
| 1251 | *
|
---|
| 1252 | * @param m the api_msg pointing to the connection and containing
|
---|
| 1253 | * the IP address and port to bind to
|
---|
| 1254 | */
|
---|
| 1255 | void
|
---|
| 1256 | lwip_netconn_do_bind_if(void *m)
|
---|
| 1257 | {
|
---|
| 1258 | struct netif *netif;
|
---|
| 1259 | struct api_msg *msg = (struct api_msg *)m;
|
---|
| 1260 | err_t err;
|
---|
| 1261 |
|
---|
| 1262 | netif = netif_get_by_index(msg->msg.bc.if_idx);
|
---|
| 1263 |
|
---|
| 1264 | if ((netif != NULL) && (msg->conn->pcb.tcp != NULL)) {
|
---|
| 1265 | err = ERR_OK;
|
---|
| 1266 | switch (NETCONNTYPE_GROUP(msg->conn->type)) {
|
---|
| 1267 | #if LWIP_RAW
|
---|
| 1268 | case NETCONN_RAW:
|
---|
| 1269 | raw_bind_netif(msg->conn->pcb.raw, netif);
|
---|
| 1270 | break;
|
---|
| 1271 | #endif /* LWIP_RAW */
|
---|
| 1272 | #if LWIP_UDP
|
---|
| 1273 | case NETCONN_UDP:
|
---|
| 1274 | udp_bind_netif(msg->conn->pcb.udp, netif);
|
---|
| 1275 | break;
|
---|
| 1276 | #endif /* LWIP_UDP */
|
---|
| 1277 | #if LWIP_TCP
|
---|
| 1278 | case NETCONN_TCP:
|
---|
| 1279 | tcp_bind_netif(msg->conn->pcb.tcp, netif);
|
---|
| 1280 | break;
|
---|
| 1281 | #endif /* LWIP_TCP */
|
---|
| 1282 | default:
|
---|
| 1283 | err = ERR_VAL;
|
---|
| 1284 | break;
|
---|
| 1285 | }
|
---|
| 1286 | } else {
|
---|
| 1287 | err = ERR_VAL;
|
---|
| 1288 | }
|
---|
| 1289 | msg->err = err;
|
---|
| 1290 | TCPIP_APIMSG_ACK(msg);
|
---|
| 1291 | }
|
---|
| 1292 |
|
---|
| 1293 | #if LWIP_TCP
|
---|
| 1294 | /**
|
---|
| 1295 | * TCP callback function if a connection (opened by tcp_connect/lwip_netconn_do_connect) has
|
---|
| 1296 | * been established (or reset by the remote host).
|
---|
| 1297 | *
|
---|
| 1298 | * @see tcp.h (struct tcp_pcb.connected) for parameters and return values
|
---|
| 1299 | */
|
---|
| 1300 | static err_t
|
---|
| 1301 | lwip_netconn_do_connected(void *arg, struct tcp_pcb *pcb, err_t err)
|
---|
| 1302 | {
|
---|
| 1303 | struct netconn *conn;
|
---|
| 1304 | int was_blocking;
|
---|
| 1305 | sys_sem_t *op_completed_sem = NULL;
|
---|
| 1306 |
|
---|
| 1307 | LWIP_UNUSED_ARG(pcb);
|
---|
| 1308 |
|
---|
| 1309 | conn = (struct netconn *)arg;
|
---|
| 1310 |
|
---|
| 1311 | if (conn == NULL) {
|
---|
| 1312 | return ERR_VAL;
|
---|
| 1313 | }
|
---|
| 1314 |
|
---|
| 1315 | LWIP_ASSERT("conn->state == NETCONN_CONNECT", conn->state == NETCONN_CONNECT);
|
---|
| 1316 | LWIP_ASSERT("(conn->current_msg != NULL) || conn->in_non_blocking_connect",
|
---|
| 1317 | (conn->current_msg != NULL) || IN_NONBLOCKING_CONNECT(conn));
|
---|
| 1318 |
|
---|
| 1319 | if (conn->current_msg != NULL) {
|
---|
| 1320 | conn->current_msg->err = err;
|
---|
| 1321 | op_completed_sem = LWIP_API_MSG_SEM(conn->current_msg);
|
---|
| 1322 | }
|
---|
| 1323 | if ((NETCONNTYPE_GROUP(conn->type) == NETCONN_TCP) && (err == ERR_OK)) {
|
---|
| 1324 | setup_tcp(conn);
|
---|
| 1325 | }
|
---|
| 1326 | was_blocking = !IN_NONBLOCKING_CONNECT(conn);
|
---|
| 1327 | SET_NONBLOCKING_CONNECT(conn, 0);
|
---|
| 1328 | LWIP_ASSERT("blocking connect state error",
|
---|
| 1329 | (was_blocking && op_completed_sem != NULL) ||
|
---|
| 1330 | (!was_blocking && op_completed_sem == NULL));
|
---|
| 1331 | conn->current_msg = NULL;
|
---|
| 1332 | conn->state = NETCONN_NONE;
|
---|
| 1333 | API_EVENT(conn, NETCONN_EVT_SENDPLUS, 0);
|
---|
| 1334 |
|
---|
| 1335 | if (was_blocking) {
|
---|
| 1336 | sys_sem_signal(op_completed_sem);
|
---|
| 1337 | }
|
---|
| 1338 | return ERR_OK;
|
---|
| 1339 | }
|
---|
| 1340 | #endif /* LWIP_TCP */
|
---|
| 1341 |
|
---|
| 1342 | /**
|
---|
| 1343 | * Connect a pcb contained inside a netconn
|
---|
| 1344 | * Called from netconn_connect.
|
---|
| 1345 | *
|
---|
| 1346 | * @param m the api_msg pointing to the connection and containing
|
---|
| 1347 | * the IP address and port to connect to
|
---|
| 1348 | */
|
---|
| 1349 | void
|
---|
| 1350 | lwip_netconn_do_connect(void *m)
|
---|
| 1351 | {
|
---|
| 1352 | struct api_msg *msg = (struct api_msg *)m;
|
---|
| 1353 | err_t err;
|
---|
| 1354 |
|
---|
| 1355 | if (msg->conn->pcb.tcp == NULL) {
|
---|
| 1356 | /* This may happen when calling netconn_connect() a second time */
|
---|
| 1357 | err = ERR_CLSD;
|
---|
| 1358 | } else {
|
---|
| 1359 | switch (NETCONNTYPE_GROUP(msg->conn->type)) {
|
---|
| 1360 | #if LWIP_RAW
|
---|
| 1361 | case NETCONN_RAW:
|
---|
| 1362 | err = raw_connect(msg->conn->pcb.raw, API_EXPR_REF(msg->msg.bc.ipaddr));
|
---|
| 1363 | break;
|
---|
| 1364 | #endif /* LWIP_RAW */
|
---|
| 1365 | #if LWIP_UDP
|
---|
| 1366 | case NETCONN_UDP:
|
---|
| 1367 | err = udp_connect(msg->conn->pcb.udp, API_EXPR_REF(msg->msg.bc.ipaddr), msg->msg.bc.port);
|
---|
| 1368 | break;
|
---|
| 1369 | #endif /* LWIP_UDP */
|
---|
| 1370 | #if LWIP_TCP
|
---|
| 1371 | case NETCONN_TCP:
|
---|
| 1372 | /* Prevent connect while doing any other action. */
|
---|
| 1373 | if (msg->conn->state == NETCONN_CONNECT) {
|
---|
| 1374 | err = ERR_ALREADY;
|
---|
| 1375 | } else if (msg->conn->state != NETCONN_NONE) {
|
---|
| 1376 | err = ERR_ISCONN;
|
---|
| 1377 | } else {
|
---|
| 1378 | setup_tcp(msg->conn);
|
---|
| 1379 | err = tcp_connect(msg->conn->pcb.tcp, API_EXPR_REF(msg->msg.bc.ipaddr),
|
---|
| 1380 | msg->msg.bc.port, lwip_netconn_do_connected);
|
---|
| 1381 | if (err == ERR_OK) {
|
---|
| 1382 | u8_t non_blocking = netconn_is_nonblocking(msg->conn);
|
---|
| 1383 | msg->conn->state = NETCONN_CONNECT;
|
---|
| 1384 | SET_NONBLOCKING_CONNECT(msg->conn, non_blocking);
|
---|
| 1385 | if (non_blocking) {
|
---|
| 1386 | err = ERR_INPROGRESS;
|
---|
| 1387 | } else {
|
---|
| 1388 | msg->conn->current_msg = msg;
|
---|
| 1389 | /* sys_sem_signal() is called from lwip_netconn_do_connected (or err_tcp()),
|
---|
| 1390 | when the connection is established! */
|
---|
| 1391 | #if LWIP_TCPIP_CORE_LOCKING
|
---|
| 1392 | LWIP_ASSERT("state!", msg->conn->state == NETCONN_CONNECT);
|
---|
| 1393 | UNLOCK_TCPIP_CORE();
|
---|
| 1394 | sys_arch_sem_wait(LWIP_API_MSG_SEM(msg), 0);
|
---|
| 1395 | LOCK_TCPIP_CORE();
|
---|
| 1396 | LWIP_ASSERT("state!", msg->conn->state != NETCONN_CONNECT);
|
---|
| 1397 | #endif /* LWIP_TCPIP_CORE_LOCKING */
|
---|
| 1398 | return;
|
---|
| 1399 | }
|
---|
| 1400 | }
|
---|
| 1401 | }
|
---|
| 1402 | break;
|
---|
| 1403 | #endif /* LWIP_TCP */
|
---|
| 1404 | default:
|
---|
| 1405 | LWIP_ERROR("Invalid netconn type", 0, do {
|
---|
| 1406 | err = ERR_VAL;
|
---|
| 1407 | } while (0));
|
---|
| 1408 | break;
|
---|
| 1409 | }
|
---|
| 1410 | }
|
---|
| 1411 | msg->err = err;
|
---|
| 1412 | /* For all other protocols, netconn_connect() calls netconn_apimsg(),
|
---|
| 1413 | so use TCPIP_APIMSG_ACK() here. */
|
---|
| 1414 | TCPIP_APIMSG_ACK(msg);
|
---|
| 1415 | }
|
---|
| 1416 |
|
---|
| 1417 | /**
|
---|
| 1418 | * Disconnect a pcb contained inside a netconn
|
---|
| 1419 | * Only used for UDP netconns.
|
---|
| 1420 | * Called from netconn_disconnect.
|
---|
| 1421 | *
|
---|
| 1422 | * @param m the api_msg pointing to the connection to disconnect
|
---|
| 1423 | */
|
---|
| 1424 | void
|
---|
| 1425 | lwip_netconn_do_disconnect(void *m)
|
---|
| 1426 | {
|
---|
| 1427 | struct api_msg *msg = (struct api_msg *)m;
|
---|
| 1428 |
|
---|
| 1429 | #if LWIP_UDP
|
---|
| 1430 | if (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_UDP) {
|
---|
| 1431 | udp_disconnect(msg->conn->pcb.udp);
|
---|
| 1432 | msg->err = ERR_OK;
|
---|
| 1433 | } else
|
---|
| 1434 | #endif /* LWIP_UDP */
|
---|
| 1435 | {
|
---|
| 1436 | msg->err = ERR_VAL;
|
---|
| 1437 | }
|
---|
| 1438 | TCPIP_APIMSG_ACK(msg);
|
---|
| 1439 | }
|
---|
| 1440 |
|
---|
| 1441 | #if LWIP_TCP
|
---|
| 1442 | /**
|
---|
| 1443 | * Set a TCP pcb contained in a netconn into listen mode
|
---|
| 1444 | * Called from netconn_listen.
|
---|
| 1445 | *
|
---|
| 1446 | * @param m the api_msg pointing to the connection
|
---|
| 1447 | */
|
---|
| 1448 | void
|
---|
| 1449 | lwip_netconn_do_listen(void *m)
|
---|
| 1450 | {
|
---|
| 1451 | struct api_msg *msg = (struct api_msg *)m;
|
---|
| 1452 | err_t err;
|
---|
| 1453 |
|
---|
| 1454 | if (msg->conn->pcb.tcp != NULL) {
|
---|
| 1455 | if (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_TCP) {
|
---|
| 1456 | if (msg->conn->state == NETCONN_NONE) {
|
---|
| 1457 | struct tcp_pcb *lpcb;
|
---|
| 1458 | if (msg->conn->pcb.tcp->state != CLOSED) {
|
---|
| 1459 | /* connection is not closed, cannot listen */
|
---|
| 1460 | err = ERR_VAL;
|
---|
| 1461 | } else {
|
---|
| 1462 | u8_t backlog;
|
---|
| 1463 | #if TCP_LISTEN_BACKLOG
|
---|
| 1464 | backlog = msg->msg.lb.backlog;
|
---|
| 1465 | #else /* TCP_LISTEN_BACKLOG */
|
---|
| 1466 | backlog = TCP_DEFAULT_LISTEN_BACKLOG;
|
---|
| 1467 | #endif /* TCP_LISTEN_BACKLOG */
|
---|
| 1468 | #if LWIP_IPV4 && LWIP_IPV6
|
---|
| 1469 | /* "Socket API like" dual-stack support: If IP to listen to is IP6_ADDR_ANY,
|
---|
| 1470 | * and NETCONN_FLAG_IPV6_V6ONLY is NOT set, use IP_ANY_TYPE to listen
|
---|
| 1471 | */
|
---|
| 1472 | if (ip_addr_cmp(&msg->conn->pcb.ip->local_ip, IP6_ADDR_ANY) &&
|
---|
| 1473 | (netconn_get_ipv6only(msg->conn) == 0)) {
|
---|
| 1474 | /* change PCB type to IPADDR_TYPE_ANY */
|
---|
| 1475 | IP_SET_TYPE_VAL(msg->conn->pcb.tcp->local_ip, IPADDR_TYPE_ANY);
|
---|
| 1476 | IP_SET_TYPE_VAL(msg->conn->pcb.tcp->remote_ip, IPADDR_TYPE_ANY);
|
---|
| 1477 | }
|
---|
| 1478 | #endif /* LWIP_IPV4 && LWIP_IPV6 */
|
---|
| 1479 |
|
---|
| 1480 | lpcb = tcp_listen_with_backlog_and_err(msg->conn->pcb.tcp, backlog, &err);
|
---|
| 1481 |
|
---|
| 1482 | if (lpcb == NULL) {
|
---|
| 1483 | /* in this case, the old pcb is still allocated */
|
---|
| 1484 | } else {
|
---|
| 1485 | /* delete the recvmbox and allocate the acceptmbox */
|
---|
| 1486 | if (sys_mbox_valid(&msg->conn->recvmbox)) {
|
---|
| 1487 | /** @todo: should we drain the recvmbox here? */
|
---|
| 1488 | sys_mbox_free(&msg->conn->recvmbox);
|
---|
| 1489 | sys_mbox_set_invalid(&msg->conn->recvmbox);
|
---|
| 1490 | }
|
---|
| 1491 | err = ERR_OK;
|
---|
| 1492 | if (!sys_mbox_valid(&msg->conn->acceptmbox)) {
|
---|
| 1493 | err = sys_mbox_new(&msg->conn->acceptmbox, DEFAULT_ACCEPTMBOX_SIZE);
|
---|
| 1494 | }
|
---|
| 1495 | if (err == ERR_OK) {
|
---|
| 1496 | msg->conn->state = NETCONN_LISTEN;
|
---|
| 1497 | msg->conn->pcb.tcp = lpcb;
|
---|
| 1498 | tcp_arg(msg->conn->pcb.tcp, msg->conn);
|
---|
| 1499 | tcp_accept(msg->conn->pcb.tcp, accept_function);
|
---|
| 1500 | } else {
|
---|
| 1501 | /* since the old pcb is already deallocated, free lpcb now */
|
---|
| 1502 | tcp_close(lpcb);
|
---|
| 1503 | msg->conn->pcb.tcp = NULL;
|
---|
| 1504 | }
|
---|
| 1505 | }
|
---|
| 1506 | }
|
---|
| 1507 | } else if (msg->conn->state == NETCONN_LISTEN) {
|
---|
| 1508 | /* already listening, allow updating of the backlog */
|
---|
| 1509 | err = ERR_OK;
|
---|
| 1510 | tcp_backlog_set(msg->conn->pcb.tcp, msg->msg.lb.backlog);
|
---|
| 1511 | } else {
|
---|
| 1512 | err = ERR_CONN;
|
---|
| 1513 | }
|
---|
| 1514 | } else {
|
---|
| 1515 | err = ERR_ARG;
|
---|
| 1516 | }
|
---|
| 1517 | } else {
|
---|
| 1518 | err = ERR_CONN;
|
---|
| 1519 | }
|
---|
| 1520 | msg->err = err;
|
---|
| 1521 | TCPIP_APIMSG_ACK(msg);
|
---|
| 1522 | }
|
---|
| 1523 | #endif /* LWIP_TCP */
|
---|
| 1524 |
|
---|
| 1525 | /**
|
---|
| 1526 | * Send some data on a RAW or UDP pcb contained in a netconn
|
---|
| 1527 | * Called from netconn_send
|
---|
| 1528 | *
|
---|
| 1529 | * @param m the api_msg pointing to the connection
|
---|
| 1530 | */
|
---|
| 1531 | void
|
---|
| 1532 | lwip_netconn_do_send(void *m)
|
---|
| 1533 | {
|
---|
| 1534 | struct api_msg *msg = (struct api_msg *)m;
|
---|
| 1535 |
|
---|
| 1536 | err_t err = netconn_err(msg->conn);
|
---|
| 1537 | if (err == ERR_OK) {
|
---|
| 1538 | if (msg->conn->pcb.tcp != NULL) {
|
---|
| 1539 | switch (NETCONNTYPE_GROUP(msg->conn->type)) {
|
---|
| 1540 | #if LWIP_RAW
|
---|
| 1541 | case NETCONN_RAW:
|
---|
| 1542 | if (ip_addr_isany(&msg->msg.b->addr) || IP_IS_ANY_TYPE_VAL(msg->msg.b->addr)) {
|
---|
| 1543 | err = raw_send(msg->conn->pcb.raw, msg->msg.b->p);
|
---|
| 1544 | } else {
|
---|
| 1545 | err = raw_sendto(msg->conn->pcb.raw, msg->msg.b->p, &msg->msg.b->addr);
|
---|
| 1546 | }
|
---|
| 1547 | break;
|
---|
| 1548 | #endif
|
---|
| 1549 | #if LWIP_UDP
|
---|
| 1550 | case NETCONN_UDP:
|
---|
| 1551 | #if LWIP_CHECKSUM_ON_COPY
|
---|
| 1552 | if (ip_addr_isany(&msg->msg.b->addr) || IP_IS_ANY_TYPE_VAL(msg->msg.b->addr)) {
|
---|
| 1553 | err = udp_send_chksum(msg->conn->pcb.udp, msg->msg.b->p,
|
---|
| 1554 | msg->msg.b->flags & NETBUF_FLAG_CHKSUM, msg->msg.b->toport_chksum);
|
---|
| 1555 | } else {
|
---|
| 1556 | err = udp_sendto_chksum(msg->conn->pcb.udp, msg->msg.b->p,
|
---|
| 1557 | &msg->msg.b->addr, msg->msg.b->port,
|
---|
| 1558 | msg->msg.b->flags & NETBUF_FLAG_CHKSUM, msg->msg.b->toport_chksum);
|
---|
| 1559 | }
|
---|
| 1560 | #else /* LWIP_CHECKSUM_ON_COPY */
|
---|
| 1561 | if (ip_addr_isany_val(msg->msg.b->addr) || IP_IS_ANY_TYPE_VAL(msg->msg.b->addr)) {
|
---|
| 1562 | err = udp_send(msg->conn->pcb.udp, msg->msg.b->p);
|
---|
| 1563 | } else {
|
---|
| 1564 | err = udp_sendto(msg->conn->pcb.udp, msg->msg.b->p, &msg->msg.b->addr, msg->msg.b->port);
|
---|
| 1565 | }
|
---|
| 1566 | #endif /* LWIP_CHECKSUM_ON_COPY */
|
---|
| 1567 | break;
|
---|
| 1568 | #endif /* LWIP_UDP */
|
---|
| 1569 | default:
|
---|
| 1570 | err = ERR_CONN;
|
---|
| 1571 | break;
|
---|
| 1572 | }
|
---|
| 1573 | } else {
|
---|
| 1574 | err = ERR_CONN;
|
---|
| 1575 | }
|
---|
| 1576 | }
|
---|
| 1577 | msg->err = err;
|
---|
| 1578 | TCPIP_APIMSG_ACK(msg);
|
---|
| 1579 | }
|
---|
| 1580 |
|
---|
| 1581 | #if LWIP_TCP
|
---|
| 1582 | /**
|
---|
| 1583 | * Indicate data has been received from a TCP pcb contained in a netconn
|
---|
| 1584 | * Called from netconn_recv
|
---|
| 1585 | *
|
---|
| 1586 | * @param m the api_msg pointing to the connection
|
---|
| 1587 | */
|
---|
| 1588 | void
|
---|
| 1589 | lwip_netconn_do_recv(void *m)
|
---|
| 1590 | {
|
---|
| 1591 | struct api_msg *msg = (struct api_msg *)m;
|
---|
| 1592 |
|
---|
| 1593 | msg->err = ERR_OK;
|
---|
| 1594 | if (msg->conn->pcb.tcp != NULL) {
|
---|
| 1595 | if (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_TCP) {
|
---|
| 1596 | size_t remaining = msg->msg.r.len;
|
---|
| 1597 | do {
|
---|
| 1598 | u16_t recved = (u16_t)((remaining > 0xffff) ? 0xffff : remaining);
|
---|
| 1599 | tcp_recved(msg->conn->pcb.tcp, recved);
|
---|
| 1600 | remaining -= recved;
|
---|
| 1601 | } while (remaining != 0);
|
---|
| 1602 | }
|
---|
| 1603 | }
|
---|
| 1604 | TCPIP_APIMSG_ACK(msg);
|
---|
| 1605 | }
|
---|
| 1606 |
|
---|
| 1607 | #if TCP_LISTEN_BACKLOG
|
---|
| 1608 | /** Indicate that a TCP pcb has been accepted
|
---|
| 1609 | * Called from netconn_accept
|
---|
| 1610 | *
|
---|
| 1611 | * @param m the api_msg pointing to the connection
|
---|
| 1612 | */
|
---|
| 1613 | void
|
---|
| 1614 | lwip_netconn_do_accepted(void *m)
|
---|
| 1615 | {
|
---|
| 1616 | struct api_msg *msg = (struct api_msg *)m;
|
---|
| 1617 |
|
---|
| 1618 | msg->err = ERR_OK;
|
---|
| 1619 | if (msg->conn->pcb.tcp != NULL) {
|
---|
| 1620 | if (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_TCP) {
|
---|
| 1621 | tcp_backlog_accepted(msg->conn->pcb.tcp);
|
---|
| 1622 | }
|
---|
| 1623 | }
|
---|
| 1624 | TCPIP_APIMSG_ACK(msg);
|
---|
| 1625 | }
|
---|
| 1626 | #endif /* TCP_LISTEN_BACKLOG */
|
---|
| 1627 |
|
---|
| 1628 | /**
|
---|
| 1629 | * See if more data needs to be written from a previous call to netconn_write.
|
---|
| 1630 | * Called initially from lwip_netconn_do_write. If the first call can't send all data
|
---|
| 1631 | * (because of low memory or empty send-buffer), this function is called again
|
---|
| 1632 | * from sent_tcp() or poll_tcp() to send more data. If all data is sent, the
|
---|
| 1633 | * blocking application thread (waiting in netconn_write) is released.
|
---|
| 1634 | *
|
---|
| 1635 | * @param conn netconn (that is currently in state NETCONN_WRITE) to process
|
---|
| 1636 | * @return ERR_OK
|
---|
| 1637 | * ERR_MEM if LWIP_TCPIP_CORE_LOCKING=1 and sending hasn't yet finished
|
---|
| 1638 | */
|
---|
| 1639 | static err_t
|
---|
| 1640 | lwip_netconn_do_writemore(struct netconn *conn WRITE_DELAYED_PARAM)
|
---|
| 1641 | {
|
---|
| 1642 | err_t err;
|
---|
| 1643 | const void *dataptr;
|
---|
| 1644 | u16_t len, available;
|
---|
| 1645 | u8_t write_finished = 0;
|
---|
| 1646 | size_t diff;
|
---|
| 1647 | u8_t dontblock;
|
---|
| 1648 | u8_t apiflags;
|
---|
| 1649 | u8_t write_more;
|
---|
| 1650 |
|
---|
| 1651 | LWIP_ASSERT("conn != NULL", conn != NULL);
|
---|
| 1652 | LWIP_ASSERT("conn->state == NETCONN_WRITE", (conn->state == NETCONN_WRITE));
|
---|
| 1653 | LWIP_ASSERT("conn->current_msg != NULL", conn->current_msg != NULL);
|
---|
| 1654 | LWIP_ASSERT("conn->pcb.tcp != NULL", conn->pcb.tcp != NULL);
|
---|
| 1655 | LWIP_ASSERT("conn->current_msg->msg.w.offset < conn->current_msg->msg.w.len",
|
---|
| 1656 | conn->current_msg->msg.w.offset < conn->current_msg->msg.w.len);
|
---|
| 1657 | LWIP_ASSERT("conn->current_msg->msg.w.vector_cnt > 0", conn->current_msg->msg.w.vector_cnt > 0);
|
---|
| 1658 |
|
---|
| 1659 | apiflags = conn->current_msg->msg.w.apiflags;
|
---|
| 1660 | dontblock = netconn_is_nonblocking(conn) || (apiflags & NETCONN_DONTBLOCK);
|
---|
| 1661 |
|
---|
| 1662 | #if LWIP_SO_SNDTIMEO
|
---|
| 1663 | if ((conn->send_timeout != 0) &&
|
---|
| 1664 | ((s32_t)(sys_now() - conn->current_msg->msg.w.time_started) >= conn->send_timeout)) {
|
---|
| 1665 | write_finished = 1;
|
---|
| 1666 | if (conn->current_msg->msg.w.offset == 0) {
|
---|
| 1667 | /* nothing has been written */
|
---|
| 1668 | err = ERR_WOULDBLOCK;
|
---|
| 1669 | } else {
|
---|
| 1670 | /* partial write */
|
---|
| 1671 | err = ERR_OK;
|
---|
| 1672 | }
|
---|
| 1673 | } else
|
---|
| 1674 | #endif /* LWIP_SO_SNDTIMEO */
|
---|
| 1675 | {
|
---|
| 1676 | do {
|
---|
| 1677 | dataptr = (const u8_t *)conn->current_msg->msg.w.vector->ptr + conn->current_msg->msg.w.vector_off;
|
---|
| 1678 | diff = conn->current_msg->msg.w.vector->len - conn->current_msg->msg.w.vector_off;
|
---|
| 1679 | if (diff > 0xffffUL) { /* max_u16_t */
|
---|
| 1680 | len = 0xffff;
|
---|
| 1681 | apiflags |= TCP_WRITE_FLAG_MORE;
|
---|
| 1682 | } else {
|
---|
| 1683 | len = (u16_t)diff;
|
---|
| 1684 | }
|
---|
| 1685 | available = tcp_sndbuf(conn->pcb.tcp);
|
---|
| 1686 | if (available < len) {
|
---|
| 1687 | /* don't try to write more than sendbuf */
|
---|
| 1688 | len = available;
|
---|
| 1689 | if (dontblock) {
|
---|
| 1690 | if (!len) {
|
---|
| 1691 | /* set error according to partial write or not */
|
---|
| 1692 | err = (conn->current_msg->msg.w.offset == 0) ? ERR_WOULDBLOCK : ERR_OK;
|
---|
| 1693 | goto err_mem;
|
---|
| 1694 | }
|
---|
| 1695 | } else {
|
---|
| 1696 | apiflags |= TCP_WRITE_FLAG_MORE;
|
---|
| 1697 | }
|
---|
| 1698 | }
|
---|
| 1699 | LWIP_ASSERT("lwip_netconn_do_writemore: invalid length!",
|
---|
| 1700 | ((conn->current_msg->msg.w.vector_off + len) <= conn->current_msg->msg.w.vector->len));
|
---|
| 1701 | /* we should loop around for more sending in the following cases:
|
---|
| 1702 | 1) We couldn't finish the current vector because of 16-bit size limitations.
|
---|
| 1703 | tcp_write() and tcp_sndbuf() both are limited to 16-bit sizes
|
---|
| 1704 | 2) We are sending the remainder of the current vector and have more */
|
---|
| 1705 | if ((len == 0xffff && diff > 0xffffUL) ||
|
---|
| 1706 | (len == (u16_t)diff && conn->current_msg->msg.w.vector_cnt > 1)) {
|
---|
| 1707 | write_more = 1;
|
---|
| 1708 | apiflags |= TCP_WRITE_FLAG_MORE;
|
---|
| 1709 | } else {
|
---|
| 1710 | write_more = 0;
|
---|
| 1711 | }
|
---|
| 1712 | err = tcp_write(conn->pcb.tcp, dataptr, len, apiflags);
|
---|
| 1713 | if (err == ERR_OK) {
|
---|
| 1714 | conn->current_msg->msg.w.offset += len;
|
---|
| 1715 | conn->current_msg->msg.w.vector_off += len;
|
---|
| 1716 | /* check if current vector is finished */
|
---|
| 1717 | if (conn->current_msg->msg.w.vector_off == conn->current_msg->msg.w.vector->len) {
|
---|
| 1718 | conn->current_msg->msg.w.vector_cnt--;
|
---|
| 1719 | /* if we have additional vectors, move on to them */
|
---|
| 1720 | if (conn->current_msg->msg.w.vector_cnt > 0) {
|
---|
| 1721 | conn->current_msg->msg.w.vector++;
|
---|
| 1722 | conn->current_msg->msg.w.vector_off = 0;
|
---|
| 1723 | }
|
---|
| 1724 | }
|
---|
| 1725 | }
|
---|
| 1726 | } while (write_more && err == ERR_OK);
|
---|
| 1727 | /* if OK or memory error, check available space */
|
---|
| 1728 | if ((err == ERR_OK) || (err == ERR_MEM)) {
|
---|
| 1729 | err_mem:
|
---|
| 1730 | if (dontblock && (conn->current_msg->msg.w.offset < conn->current_msg->msg.w.len)) {
|
---|
| 1731 | /* non-blocking write did not write everything: mark the pcb non-writable
|
---|
| 1732 | and let poll_tcp check writable space to mark the pcb writable again */
|
---|
| 1733 | API_EVENT(conn, NETCONN_EVT_SENDMINUS, 0);
|
---|
| 1734 | conn->flags |= NETCONN_FLAG_CHECK_WRITESPACE;
|
---|
| 1735 | } else if ((tcp_sndbuf(conn->pcb.tcp) <= TCP_SNDLOWAT) ||
|
---|
| 1736 | (tcp_sndqueuelen(conn->pcb.tcp) >= TCP_SNDQUEUELOWAT)) {
|
---|
| 1737 | /* The queued byte- or pbuf-count exceeds the configured low-water limit,
|
---|
| 1738 | let select mark this pcb as non-writable. */
|
---|
| 1739 | API_EVENT(conn, NETCONN_EVT_SENDMINUS, 0);
|
---|
| 1740 | }
|
---|
| 1741 | }
|
---|
| 1742 |
|
---|
| 1743 | if (err == ERR_OK) {
|
---|
| 1744 | err_t out_err;
|
---|
| 1745 | if ((conn->current_msg->msg.w.offset == conn->current_msg->msg.w.len) || dontblock) {
|
---|
| 1746 | /* return sent length (caller reads length from msg.w.offset) */
|
---|
| 1747 | write_finished = 1;
|
---|
| 1748 | }
|
---|
| 1749 | out_err = tcp_output(conn->pcb.tcp);
|
---|
| 1750 | if (out_err == ERR_RTE) {
|
---|
| 1751 | /* If tcp_output fails because no route is found,
|
---|
| 1752 | don't try writing any more but return the error
|
---|
| 1753 | to the application thread. */
|
---|
| 1754 | err = out_err;
|
---|
| 1755 | write_finished = 1;
|
---|
| 1756 | }
|
---|
| 1757 | } else if (err == ERR_MEM) {
|
---|
| 1758 | /* If ERR_MEM, we wait for sent_tcp or poll_tcp to be called.
|
---|
| 1759 | For blocking sockets, we do NOT return to the application
|
---|
| 1760 | thread, since ERR_MEM is only a temporary error! Non-blocking
|
---|
| 1761 | will remain non-writable until sent_tcp/poll_tcp is called */
|
---|
| 1762 |
|
---|
| 1763 | /* tcp_write returned ERR_MEM, try tcp_output anyway */
|
---|
| 1764 | err_t out_err = tcp_output(conn->pcb.tcp);
|
---|
| 1765 | if (out_err == ERR_RTE) {
|
---|
| 1766 | /* If tcp_output fails because no route is found,
|
---|
| 1767 | don't try writing any more but return the error
|
---|
| 1768 | to the application thread. */
|
---|
| 1769 | err = out_err;
|
---|
| 1770 | write_finished = 1;
|
---|
| 1771 | } else if (dontblock) {
|
---|
| 1772 | /* non-blocking write is done on ERR_MEM, set error according
|
---|
| 1773 | to partial write or not */
|
---|
| 1774 | err = (conn->current_msg->msg.w.offset == 0) ? ERR_WOULDBLOCK : ERR_OK;
|
---|
| 1775 | write_finished = 1;
|
---|
| 1776 | }
|
---|
| 1777 | } else {
|
---|
| 1778 | /* On errors != ERR_MEM, we don't try writing any more but return
|
---|
| 1779 | the error to the application thread. */
|
---|
| 1780 | write_finished = 1;
|
---|
| 1781 | }
|
---|
| 1782 | }
|
---|
| 1783 | if (write_finished) {
|
---|
| 1784 | /* everything was written: set back connection state
|
---|
| 1785 | and back to application task */
|
---|
| 1786 | sys_sem_t *op_completed_sem = LWIP_API_MSG_SEM(conn->current_msg);
|
---|
| 1787 | conn->current_msg->err = err;
|
---|
| 1788 | conn->current_msg = NULL;
|
---|
| 1789 | conn->state = NETCONN_NONE;
|
---|
| 1790 | #if LWIP_TCPIP_CORE_LOCKING
|
---|
| 1791 | if (delayed)
|
---|
| 1792 | #endif
|
---|
| 1793 | {
|
---|
| 1794 | sys_sem_signal(op_completed_sem);
|
---|
| 1795 | }
|
---|
| 1796 | }
|
---|
| 1797 | #if LWIP_TCPIP_CORE_LOCKING
|
---|
| 1798 | else {
|
---|
| 1799 | return ERR_MEM;
|
---|
| 1800 | }
|
---|
| 1801 | #endif
|
---|
| 1802 | return ERR_OK;
|
---|
| 1803 | }
|
---|
| 1804 | #endif /* LWIP_TCP */
|
---|
| 1805 |
|
---|
| 1806 | /**
|
---|
| 1807 | * Send some data on a TCP pcb contained in a netconn
|
---|
| 1808 | * Called from netconn_write
|
---|
| 1809 | *
|
---|
| 1810 | * @param m the api_msg pointing to the connection
|
---|
| 1811 | */
|
---|
| 1812 | void
|
---|
| 1813 | lwip_netconn_do_write(void *m)
|
---|
| 1814 | {
|
---|
| 1815 | struct api_msg *msg = (struct api_msg *)m;
|
---|
| 1816 |
|
---|
| 1817 | err_t err = netconn_err(msg->conn);
|
---|
| 1818 | if (err == ERR_OK) {
|
---|
| 1819 | if (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_TCP) {
|
---|
| 1820 | #if LWIP_TCP
|
---|
| 1821 | if (msg->conn->state != NETCONN_NONE) {
|
---|
| 1822 | /* netconn is connecting, closing or in blocking write */
|
---|
| 1823 | err = ERR_INPROGRESS;
|
---|
| 1824 | } else if (msg->conn->pcb.tcp != NULL) {
|
---|
| 1825 | msg->conn->state = NETCONN_WRITE;
|
---|
| 1826 | /* set all the variables used by lwip_netconn_do_writemore */
|
---|
| 1827 | LWIP_ASSERT("already writing or closing", msg->conn->current_msg == NULL);
|
---|
| 1828 | LWIP_ASSERT("msg->msg.w.len != 0", msg->msg.w.len != 0);
|
---|
| 1829 | msg->conn->current_msg = msg;
|
---|
| 1830 | #if LWIP_TCPIP_CORE_LOCKING
|
---|
| 1831 | if (lwip_netconn_do_writemore(msg->conn, 0) != ERR_OK) {
|
---|
| 1832 | LWIP_ASSERT("state!", msg->conn->state == NETCONN_WRITE);
|
---|
| 1833 | UNLOCK_TCPIP_CORE();
|
---|
| 1834 | sys_arch_sem_wait(LWIP_API_MSG_SEM(msg), 0);
|
---|
| 1835 | LOCK_TCPIP_CORE();
|
---|
| 1836 | LWIP_ASSERT("state!", msg->conn->state != NETCONN_WRITE);
|
---|
| 1837 | }
|
---|
| 1838 | #else /* LWIP_TCPIP_CORE_LOCKING */
|
---|
| 1839 | lwip_netconn_do_writemore(msg->conn);
|
---|
| 1840 | #endif /* LWIP_TCPIP_CORE_LOCKING */
|
---|
| 1841 | /* for both cases: if lwip_netconn_do_writemore was called, don't ACK the APIMSG
|
---|
| 1842 | since lwip_netconn_do_writemore ACKs it! */
|
---|
| 1843 | return;
|
---|
| 1844 | } else {
|
---|
| 1845 | err = ERR_CONN;
|
---|
| 1846 | }
|
---|
| 1847 | #else /* LWIP_TCP */
|
---|
| 1848 | err = ERR_VAL;
|
---|
| 1849 | #endif /* LWIP_TCP */
|
---|
| 1850 | #if (LWIP_UDP || LWIP_RAW)
|
---|
| 1851 | } else {
|
---|
| 1852 | err = ERR_VAL;
|
---|
| 1853 | #endif /* (LWIP_UDP || LWIP_RAW) */
|
---|
| 1854 | }
|
---|
| 1855 | }
|
---|
| 1856 | msg->err = err;
|
---|
| 1857 | TCPIP_APIMSG_ACK(msg);
|
---|
| 1858 | }
|
---|
| 1859 |
|
---|
| 1860 | /**
|
---|
| 1861 | * Return a connection's local or remote address
|
---|
| 1862 | * Called from netconn_getaddr
|
---|
| 1863 | *
|
---|
| 1864 | * @param m the api_msg pointing to the connection
|
---|
| 1865 | */
|
---|
| 1866 | void
|
---|
| 1867 | lwip_netconn_do_getaddr(void *m)
|
---|
| 1868 | {
|
---|
| 1869 | struct api_msg *msg = (struct api_msg *)m;
|
---|
| 1870 |
|
---|
| 1871 | if (msg->conn->pcb.ip != NULL) {
|
---|
| 1872 | if (msg->msg.ad.local) {
|
---|
| 1873 | ip_addr_copy(API_EXPR_DEREF(msg->msg.ad.ipaddr),
|
---|
| 1874 | msg->conn->pcb.ip->local_ip);
|
---|
| 1875 | } else {
|
---|
| 1876 | ip_addr_copy(API_EXPR_DEREF(msg->msg.ad.ipaddr),
|
---|
| 1877 | msg->conn->pcb.ip->remote_ip);
|
---|
| 1878 | }
|
---|
| 1879 |
|
---|
| 1880 | msg->err = ERR_OK;
|
---|
| 1881 | switch (NETCONNTYPE_GROUP(msg->conn->type)) {
|
---|
| 1882 | #if LWIP_RAW
|
---|
| 1883 | case NETCONN_RAW:
|
---|
| 1884 | if (msg->msg.ad.local) {
|
---|
| 1885 | API_EXPR_DEREF(msg->msg.ad.port) = msg->conn->pcb.raw->protocol;
|
---|
| 1886 | } else {
|
---|
| 1887 | /* return an error as connecting is only a helper for upper layers */
|
---|
| 1888 | msg->err = ERR_CONN;
|
---|
| 1889 | }
|
---|
| 1890 | break;
|
---|
| 1891 | #endif /* LWIP_RAW */
|
---|
| 1892 | #if LWIP_UDP
|
---|
| 1893 | case NETCONN_UDP:
|
---|
| 1894 | if (msg->msg.ad.local) {
|
---|
| 1895 | API_EXPR_DEREF(msg->msg.ad.port) = msg->conn->pcb.udp->local_port;
|
---|
| 1896 | } else {
|
---|
| 1897 | if ((msg->conn->pcb.udp->flags & UDP_FLAGS_CONNECTED) == 0) {
|
---|
| 1898 | msg->err = ERR_CONN;
|
---|
| 1899 | } else {
|
---|
| 1900 | API_EXPR_DEREF(msg->msg.ad.port) = msg->conn->pcb.udp->remote_port;
|
---|
| 1901 | }
|
---|
| 1902 | }
|
---|
| 1903 | break;
|
---|
| 1904 | #endif /* LWIP_UDP */
|
---|
| 1905 | #if LWIP_TCP
|
---|
| 1906 | case NETCONN_TCP:
|
---|
| 1907 | if ((msg->msg.ad.local == 0) &&
|
---|
| 1908 | ((msg->conn->pcb.tcp->state == CLOSED) || (msg->conn->pcb.tcp->state == LISTEN))) {
|
---|
| 1909 | /* pcb is not connected and remote name is requested */
|
---|
| 1910 | msg->err = ERR_CONN;
|
---|
| 1911 | } else {
|
---|
| 1912 | API_EXPR_DEREF(msg->msg.ad.port) = (msg->msg.ad.local ? msg->conn->pcb.tcp->local_port : msg->conn->pcb.tcp->remote_port);
|
---|
| 1913 | }
|
---|
| 1914 | break;
|
---|
| 1915 | #endif /* LWIP_TCP */
|
---|
| 1916 | default:
|
---|
| 1917 | LWIP_ASSERT("invalid netconn_type", 0);
|
---|
| 1918 | break;
|
---|
| 1919 | }
|
---|
| 1920 | } else {
|
---|
| 1921 | msg->err = ERR_CONN;
|
---|
| 1922 | }
|
---|
| 1923 | TCPIP_APIMSG_ACK(msg);
|
---|
| 1924 | }
|
---|
| 1925 |
|
---|
| 1926 | /**
|
---|
| 1927 | * Close or half-shutdown a TCP pcb contained in a netconn
|
---|
| 1928 | * Called from netconn_close
|
---|
| 1929 | * In contrast to closing sockets, the netconn is not deallocated.
|
---|
| 1930 | *
|
---|
| 1931 | * @param m the api_msg pointing to the connection
|
---|
| 1932 | */
|
---|
| 1933 | void
|
---|
| 1934 | lwip_netconn_do_close(void *m)
|
---|
| 1935 | {
|
---|
| 1936 | struct api_msg *msg = (struct api_msg *)m;
|
---|
| 1937 |
|
---|
| 1938 | #if LWIP_TCP
|
---|
| 1939 | enum netconn_state state = msg->conn->state;
|
---|
| 1940 | /* First check if this is a TCP netconn and if it is in a correct state
|
---|
| 1941 | (LISTEN doesn't support half shutdown) */
|
---|
| 1942 | if ((msg->conn->pcb.tcp != NULL) &&
|
---|
| 1943 | (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_TCP) &&
|
---|
| 1944 | ((msg->msg.sd.shut == NETCONN_SHUT_RDWR) || (state != NETCONN_LISTEN))) {
|
---|
| 1945 | /* Check if we are in a connected state */
|
---|
| 1946 | if (state == NETCONN_CONNECT) {
|
---|
| 1947 | /* TCP connect in progress: cannot shutdown */
|
---|
| 1948 | msg->err = ERR_CONN;
|
---|
| 1949 | } else if (state == NETCONN_WRITE) {
|
---|
| 1950 | #if LWIP_NETCONN_FULLDUPLEX
|
---|
| 1951 | if (msg->msg.sd.shut & NETCONN_SHUT_WR) {
|
---|
| 1952 | /* close requested, abort running write */
|
---|
| 1953 | sys_sem_t *write_completed_sem;
|
---|
| 1954 | LWIP_ASSERT("msg->conn->current_msg != NULL", msg->conn->current_msg != NULL);
|
---|
| 1955 | write_completed_sem = LWIP_API_MSG_SEM(msg->conn->current_msg);
|
---|
| 1956 | msg->conn->current_msg->err = ERR_CLSD;
|
---|
| 1957 | msg->conn->current_msg = NULL;
|
---|
| 1958 | msg->conn->state = NETCONN_NONE;
|
---|
| 1959 | state = NETCONN_NONE;
|
---|
| 1960 | sys_sem_signal(write_completed_sem);
|
---|
| 1961 | } else {
|
---|
| 1962 | LWIP_ASSERT("msg->msg.sd.shut == NETCONN_SHUT_RD", msg->msg.sd.shut == NETCONN_SHUT_RD);
|
---|
| 1963 | /* In this case, let the write continue and do not interfere with
|
---|
| 1964 | conn->current_msg or conn->state! */
|
---|
| 1965 | msg->err = tcp_shutdown(msg->conn->pcb.tcp, 1, 0);
|
---|
| 1966 | }
|
---|
| 1967 | }
|
---|
| 1968 | if (state == NETCONN_NONE) {
|
---|
| 1969 | #else /* LWIP_NETCONN_FULLDUPLEX */
|
---|
| 1970 | msg->err = ERR_INPROGRESS;
|
---|
| 1971 | } else {
|
---|
| 1972 | #endif /* LWIP_NETCONN_FULLDUPLEX */
|
---|
| 1973 | if (msg->msg.sd.shut & NETCONN_SHUT_RD) {
|
---|
| 1974 | #if LWIP_NETCONN_FULLDUPLEX
|
---|
| 1975 | /* Mark mboxes invalid */
|
---|
| 1976 | netconn_mark_mbox_invalid(msg->conn);
|
---|
| 1977 | #else /* LWIP_NETCONN_FULLDUPLEX */
|
---|
| 1978 | netconn_drain(msg->conn);
|
---|
| 1979 | #endif /* LWIP_NETCONN_FULLDUPLEX */
|
---|
| 1980 | }
|
---|
| 1981 | LWIP_ASSERT("already writing or closing", msg->conn->current_msg == NULL);
|
---|
| 1982 | msg->conn->state = NETCONN_CLOSE;
|
---|
| 1983 | msg->conn->current_msg = msg;
|
---|
| 1984 | #if LWIP_TCPIP_CORE_LOCKING
|
---|
| 1985 | if (lwip_netconn_do_close_internal(msg->conn, 0) != ERR_OK) {
|
---|
| 1986 | LWIP_ASSERT("state!", msg->conn->state == NETCONN_CLOSE);
|
---|
| 1987 | UNLOCK_TCPIP_CORE();
|
---|
| 1988 | sys_arch_sem_wait(LWIP_API_MSG_SEM(msg), 0);
|
---|
| 1989 | LOCK_TCPIP_CORE();
|
---|
| 1990 | LWIP_ASSERT("state!", msg->conn->state == NETCONN_NONE);
|
---|
| 1991 | }
|
---|
| 1992 | #else /* LWIP_TCPIP_CORE_LOCKING */
|
---|
| 1993 | lwip_netconn_do_close_internal(msg->conn);
|
---|
| 1994 | #endif /* LWIP_TCPIP_CORE_LOCKING */
|
---|
| 1995 | /* for tcp netconns, lwip_netconn_do_close_internal ACKs the message */
|
---|
| 1996 | return;
|
---|
| 1997 | }
|
---|
| 1998 | } else
|
---|
| 1999 | #endif /* LWIP_TCP */
|
---|
| 2000 | {
|
---|
| 2001 | msg->err = ERR_CONN;
|
---|
| 2002 | }
|
---|
| 2003 | TCPIP_APIMSG_ACK(msg);
|
---|
| 2004 | }
|
---|
| 2005 |
|
---|
| 2006 | #if LWIP_IGMP || (LWIP_IPV6 && LWIP_IPV6_MLD)
|
---|
| 2007 | /**
|
---|
| 2008 | * Join multicast groups for UDP netconns.
|
---|
| 2009 | * Called from netconn_join_leave_group
|
---|
| 2010 | *
|
---|
| 2011 | * @param m the api_msg pointing to the connection
|
---|
| 2012 | */
|
---|
| 2013 | void
|
---|
| 2014 | lwip_netconn_do_join_leave_group(void *m)
|
---|
| 2015 | {
|
---|
| 2016 | struct api_msg *msg = (struct api_msg *)m;
|
---|
| 2017 |
|
---|
| 2018 | msg->err = ERR_CONN;
|
---|
| 2019 | if (msg->conn->pcb.tcp != NULL) {
|
---|
| 2020 | if (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_UDP) {
|
---|
| 2021 | #if LWIP_UDP
|
---|
| 2022 | #if LWIP_IPV6 && LWIP_IPV6_MLD
|
---|
| 2023 | if (NETCONNTYPE_ISIPV6(msg->conn->type)) {
|
---|
| 2024 | if (msg->msg.jl.join_or_leave == NETCONN_JOIN) {
|
---|
| 2025 | msg->err = mld6_joingroup(ip_2_ip6(API_EXPR_REF(msg->msg.jl.netif_addr)),
|
---|
| 2026 | ip_2_ip6(API_EXPR_REF(msg->msg.jl.multiaddr)));
|
---|
| 2027 | } else {
|
---|
| 2028 | msg->err = mld6_leavegroup(ip_2_ip6(API_EXPR_REF(msg->msg.jl.netif_addr)),
|
---|
| 2029 | ip_2_ip6(API_EXPR_REF(msg->msg.jl.multiaddr)));
|
---|
| 2030 | }
|
---|
| 2031 | } else
|
---|
| 2032 | #endif /* LWIP_IPV6 && LWIP_IPV6_MLD */
|
---|
| 2033 | {
|
---|
| 2034 | #if LWIP_IGMP
|
---|
| 2035 | if (msg->msg.jl.join_or_leave == NETCONN_JOIN) {
|
---|
| 2036 | msg->err = igmp_joingroup(ip_2_ip4(API_EXPR_REF(msg->msg.jl.netif_addr)),
|
---|
| 2037 | ip_2_ip4(API_EXPR_REF(msg->msg.jl.multiaddr)));
|
---|
| 2038 | } else {
|
---|
| 2039 | msg->err = igmp_leavegroup(ip_2_ip4(API_EXPR_REF(msg->msg.jl.netif_addr)),
|
---|
| 2040 | ip_2_ip4(API_EXPR_REF(msg->msg.jl.multiaddr)));
|
---|
| 2041 | }
|
---|
| 2042 | #endif /* LWIP_IGMP */
|
---|
| 2043 | }
|
---|
| 2044 | #endif /* LWIP_UDP */
|
---|
| 2045 | #if (LWIP_TCP || LWIP_RAW)
|
---|
| 2046 | } else {
|
---|
| 2047 | msg->err = ERR_VAL;
|
---|
| 2048 | #endif /* (LWIP_TCP || LWIP_RAW) */
|
---|
| 2049 | }
|
---|
| 2050 | }
|
---|
| 2051 | TCPIP_APIMSG_ACK(msg);
|
---|
| 2052 | }
|
---|
| 2053 | /**
|
---|
| 2054 | * Join multicast groups for UDP netconns.
|
---|
| 2055 | * Called from netconn_join_leave_group_netif
|
---|
| 2056 | *
|
---|
| 2057 | * @param m the api_msg pointing to the connection
|
---|
| 2058 | */
|
---|
| 2059 | void
|
---|
| 2060 | lwip_netconn_do_join_leave_group_netif(void *m)
|
---|
| 2061 | {
|
---|
| 2062 | struct api_msg *msg = (struct api_msg *)m;
|
---|
| 2063 | struct netif *netif;
|
---|
| 2064 |
|
---|
| 2065 | netif = netif_get_by_index(msg->msg.jl.if_idx);
|
---|
| 2066 | if (netif == NULL) {
|
---|
| 2067 | msg->err = ERR_IF;
|
---|
| 2068 | goto done;
|
---|
| 2069 | }
|
---|
| 2070 |
|
---|
| 2071 | msg->err = ERR_CONN;
|
---|
| 2072 | if (msg->conn->pcb.tcp != NULL) {
|
---|
| 2073 | if (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_UDP) {
|
---|
| 2074 | #if LWIP_UDP
|
---|
| 2075 | #if LWIP_IPV6 && LWIP_IPV6_MLD
|
---|
| 2076 | if (NETCONNTYPE_ISIPV6(msg->conn->type)) {
|
---|
| 2077 | if (msg->msg.jl.join_or_leave == NETCONN_JOIN) {
|
---|
| 2078 | msg->err = mld6_joingroup_netif(netif,
|
---|
| 2079 | ip_2_ip6(API_EXPR_REF(msg->msg.jl.multiaddr)));
|
---|
| 2080 | } else {
|
---|
| 2081 | msg->err = mld6_leavegroup_netif(netif,
|
---|
| 2082 | ip_2_ip6(API_EXPR_REF(msg->msg.jl.multiaddr)));
|
---|
| 2083 | }
|
---|
| 2084 | } else
|
---|
| 2085 | #endif /* LWIP_IPV6 && LWIP_IPV6_MLD */
|
---|
| 2086 | {
|
---|
| 2087 | #if LWIP_IGMP
|
---|
| 2088 | if (msg->msg.jl.join_or_leave == NETCONN_JOIN) {
|
---|
| 2089 | msg->err = igmp_joingroup_netif(netif,
|
---|
| 2090 | ip_2_ip4(API_EXPR_REF(msg->msg.jl.multiaddr)));
|
---|
| 2091 | } else {
|
---|
| 2092 | msg->err = igmp_leavegroup_netif(netif,
|
---|
| 2093 | ip_2_ip4(API_EXPR_REF(msg->msg.jl.multiaddr)));
|
---|
| 2094 | }
|
---|
| 2095 | #endif /* LWIP_IGMP */
|
---|
| 2096 | }
|
---|
| 2097 | #endif /* LWIP_UDP */
|
---|
| 2098 | #if (LWIP_TCP || LWIP_RAW)
|
---|
| 2099 | } else {
|
---|
| 2100 | msg->err = ERR_VAL;
|
---|
| 2101 | #endif /* (LWIP_TCP || LWIP_RAW) */
|
---|
| 2102 | }
|
---|
| 2103 | }
|
---|
| 2104 |
|
---|
| 2105 | done:
|
---|
| 2106 | TCPIP_APIMSG_ACK(msg);
|
---|
| 2107 | }
|
---|
| 2108 | #endif /* LWIP_IGMP || (LWIP_IPV6 && LWIP_IPV6_MLD) */
|
---|
| 2109 |
|
---|
| 2110 | #if LWIP_DNS
|
---|
| 2111 | /**
|
---|
| 2112 | * Callback function that is called when DNS name is resolved
|
---|
| 2113 | * (or on timeout). A waiting application thread is waked up by
|
---|
| 2114 | * signaling the semaphore.
|
---|
| 2115 | */
|
---|
| 2116 | static void
|
---|
| 2117 | lwip_netconn_do_dns_found(const char *name, const ip_addr_t *ipaddr, void *arg)
|
---|
| 2118 | {
|
---|
| 2119 | struct dns_api_msg *msg = (struct dns_api_msg *)arg;
|
---|
| 2120 |
|
---|
| 2121 | /* we trust the internal implementation to be correct :-) */
|
---|
| 2122 | LWIP_UNUSED_ARG(name);
|
---|
| 2123 |
|
---|
| 2124 | if (ipaddr == NULL) {
|
---|
| 2125 | /* timeout or memory error */
|
---|
| 2126 | API_EXPR_DEREF(msg->err) = ERR_VAL;
|
---|
| 2127 | } else {
|
---|
| 2128 | /* address was resolved */
|
---|
| 2129 | API_EXPR_DEREF(msg->err) = ERR_OK;
|
---|
| 2130 | API_EXPR_DEREF(msg->addr) = *ipaddr;
|
---|
| 2131 | }
|
---|
| 2132 | /* wake up the application task waiting in netconn_gethostbyname */
|
---|
| 2133 | sys_sem_signal(API_EXPR_REF_SEM(msg->sem));
|
---|
| 2134 | }
|
---|
| 2135 |
|
---|
| 2136 | /**
|
---|
| 2137 | * Execute a DNS query
|
---|
| 2138 | * Called from netconn_gethostbyname
|
---|
| 2139 | *
|
---|
| 2140 | * @param arg the dns_api_msg pointing to the query
|
---|
| 2141 | */
|
---|
| 2142 | void
|
---|
| 2143 | lwip_netconn_do_gethostbyname(void *arg)
|
---|
| 2144 | {
|
---|
| 2145 | struct dns_api_msg *msg = (struct dns_api_msg *)arg;
|
---|
| 2146 | u8_t addrtype =
|
---|
| 2147 | #if LWIP_IPV4 && LWIP_IPV6
|
---|
| 2148 | msg->dns_addrtype;
|
---|
| 2149 | #else
|
---|
| 2150 | LWIP_DNS_ADDRTYPE_DEFAULT;
|
---|
| 2151 | #endif
|
---|
| 2152 |
|
---|
| 2153 | API_EXPR_DEREF(msg->err) = dns_gethostbyname_addrtype(msg->name,
|
---|
| 2154 | API_EXPR_REF(msg->addr), lwip_netconn_do_dns_found, msg, addrtype);
|
---|
| 2155 | #if LWIP_TCPIP_CORE_LOCKING
|
---|
| 2156 | /* For core locking, only block if we need to wait for answer/timeout */
|
---|
| 2157 | if (API_EXPR_DEREF(msg->err) == ERR_INPROGRESS) {
|
---|
| 2158 | UNLOCK_TCPIP_CORE();
|
---|
| 2159 | sys_sem_wait(API_EXPR_REF_SEM(msg->sem));
|
---|
| 2160 | LOCK_TCPIP_CORE();
|
---|
| 2161 | LWIP_ASSERT("do_gethostbyname still in progress!!", API_EXPR_DEREF(msg->err) != ERR_INPROGRESS);
|
---|
| 2162 | }
|
---|
| 2163 | #else /* LWIP_TCPIP_CORE_LOCKING */
|
---|
| 2164 | if (API_EXPR_DEREF(msg->err) != ERR_INPROGRESS) {
|
---|
| 2165 | /* on error or immediate success, wake up the application
|
---|
| 2166 | * task waiting in netconn_gethostbyname */
|
---|
| 2167 | sys_sem_signal(API_EXPR_REF_SEM(msg->sem));
|
---|
| 2168 | }
|
---|
| 2169 | #endif /* LWIP_TCPIP_CORE_LOCKING */
|
---|
| 2170 | }
|
---|
| 2171 | #endif /* LWIP_DNS */
|
---|
| 2172 |
|
---|
| 2173 | #endif /* LWIP_NETCONN */
|
---|