[457] | 1 | /**
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| 2 | * @file
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| 3 | * Application layered TCP connection API (to be used from TCPIP thread)\n
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| 4 | * This interface mimics the tcp callback API to the application while preventing
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| 5 | * direct linking (much like virtual functions).
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| 6 | * This way, an application can make use of other application layer protocols
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| 7 | * on top of TCP without knowing the details (e.g. TLS, proxy connection).
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| 8 | *
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| 9 | * This file contains the base implementation calling into tcp.
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| 10 | */
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| 11 |
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| 12 | /*
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| 13 | * Copyright (c) 2017 Simon Goldschmidt
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| 14 | * All rights reserved.
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| 15 | *
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| 16 | * Redistribution and use in source and binary forms, with or without modification,
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| 17 | * are permitted provided that the following conditions are met:
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| 18 | *
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| 19 | * 1. Redistributions of source code must retain the above copyright notice,
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| 20 | * this list of conditions and the following disclaimer.
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| 21 | * 2. Redistributions in binary form must reproduce the above copyright notice,
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| 22 | * this list of conditions and the following disclaimer in the documentation
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| 23 | * and/or other materials provided with the distribution.
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| 24 | * 3. The name of the author may not be used to endorse or promote products
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| 25 | * derived from this software without specific prior written permission.
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| 26 | *
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| 27 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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| 28 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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| 29 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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| 30 | * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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| 31 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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| 32 | * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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| 33 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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| 34 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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| 35 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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| 36 | * OF SUCH DAMAGE.
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| 37 | *
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| 38 | * This file is part of the lwIP TCP/IP stack.
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| 39 | *
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| 40 | * Author: Simon Goldschmidt <goldsimon@gmx.de>
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| 41 | *
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| 42 | */
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| 43 |
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| 44 | #include "lwip/opt.h"
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| 45 |
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| 46 | #if LWIP_ALTCP /* don't build if not configured for use in lwipopts.h */
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| 47 |
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| 48 | #include "lwip/altcp.h"
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| 49 | #include "lwip/altcp_tcp.h"
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| 50 | #include "lwip/priv/altcp_priv.h"
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| 51 | #include "lwip/tcp.h"
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| 52 | #include "lwip/mem.h"
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| 53 |
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| 54 | #include <string.h>
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| 55 |
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| 56 | #define ALTCP_TCP_ASSERT_CONN(conn) do { \
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| 57 | LWIP_ASSERT("conn->inner_conn == NULL", (conn)->inner_conn == NULL); \
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| 58 | LWIP_UNUSED_ARG(conn); /* for LWIP_NOASSERT */ } while(0)
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| 59 | #define ALTCP_TCP_ASSERT_CONN_PCB(conn, tpcb) do { \
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| 60 | LWIP_ASSERT("pcb mismatch", (conn)->state == tpcb); \
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| 61 | LWIP_UNUSED_ARG(tpcb); /* for LWIP_NOASSERT */ \
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| 62 | ALTCP_TCP_ASSERT_CONN(conn); } while(0)
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| 63 |
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| 64 |
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| 65 | /* Variable prototype, the actual declaration is at the end of this file
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| 66 | since it contains pointers to static functions declared here */
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| 67 | extern const struct altcp_functions altcp_tcp_functions;
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| 68 |
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| 69 | static void altcp_tcp_setup(struct altcp_pcb *conn, struct tcp_pcb *tpcb);
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| 70 |
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| 71 | /* callback functions for TCP */
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| 72 | static err_t
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| 73 | altcp_tcp_accept(void *arg, struct tcp_pcb *new_tpcb, err_t err)
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| 74 | {
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| 75 | struct altcp_pcb *listen_conn = (struct altcp_pcb *)arg;
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| 76 | if (listen_conn && listen_conn->accept) {
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| 77 | /* create a new altcp_conn to pass to the next 'accept' callback */
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| 78 | struct altcp_pcb *new_conn = altcp_alloc();
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| 79 | if (new_conn == NULL) {
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| 80 | return ERR_MEM;
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| 81 | }
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| 82 | altcp_tcp_setup(new_conn, new_tpcb);
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| 83 | return listen_conn->accept(listen_conn->arg, new_conn, err);
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| 84 | }
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| 85 | return ERR_ARG;
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| 86 | }
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| 87 |
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| 88 | static err_t
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| 89 | altcp_tcp_connected(void *arg, struct tcp_pcb *tpcb, err_t err)
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| 90 | {
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| 91 | struct altcp_pcb *conn = (struct altcp_pcb *)arg;
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| 92 | if (conn) {
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| 93 | ALTCP_TCP_ASSERT_CONN_PCB(conn, tpcb);
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| 94 | if (conn->connected) {
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| 95 | return conn->connected(conn->arg, conn, err);
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| 96 | }
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| 97 | }
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| 98 | return ERR_OK;
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| 99 | }
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| 100 |
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| 101 | static err_t
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| 102 | altcp_tcp_recv(void *arg, struct tcp_pcb *tpcb, struct pbuf *p, err_t err)
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| 103 | {
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| 104 | struct altcp_pcb *conn = (struct altcp_pcb *)arg;
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| 105 | if (conn) {
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| 106 | ALTCP_TCP_ASSERT_CONN_PCB(conn, tpcb);
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| 107 | if (conn->recv) {
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| 108 | return conn->recv(conn->arg, conn, p, err);
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| 109 | }
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| 110 | }
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| 111 | if (p != NULL) {
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| 112 | /* prevent memory leaks */
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| 113 | pbuf_free(p);
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| 114 | }
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| 115 | return ERR_OK;
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| 116 | }
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| 117 |
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| 118 | static err_t
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| 119 | altcp_tcp_sent(void *arg, struct tcp_pcb *tpcb, u16_t len)
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| 120 | {
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| 121 | struct altcp_pcb *conn = (struct altcp_pcb *)arg;
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| 122 | if (conn) {
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| 123 | ALTCP_TCP_ASSERT_CONN_PCB(conn, tpcb);
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| 124 | if (conn->sent) {
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| 125 | return conn->sent(conn->arg, conn, len);
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| 126 | }
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| 127 | }
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| 128 | return ERR_OK;
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| 129 | }
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| 130 |
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| 131 | static err_t
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| 132 | altcp_tcp_poll(void *arg, struct tcp_pcb *tpcb)
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| 133 | {
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| 134 | struct altcp_pcb *conn = (struct altcp_pcb *)arg;
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| 135 | if (conn) {
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| 136 | ALTCP_TCP_ASSERT_CONN_PCB(conn, tpcb);
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| 137 | if (conn->poll) {
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| 138 | return conn->poll(conn->arg, conn);
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| 139 | }
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| 140 | }
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| 141 | return ERR_OK;
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| 142 | }
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| 143 |
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| 144 | static void
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| 145 | altcp_tcp_err(void *arg, err_t err)
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| 146 | {
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| 147 | struct altcp_pcb *conn = (struct altcp_pcb *)arg;
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| 148 | if (conn) {
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| 149 | conn->state = NULL; /* already freed */
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| 150 | if (conn->err) {
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| 151 | conn->err(conn->arg, err);
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| 152 | }
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| 153 | altcp_free(conn);
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| 154 | }
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| 155 | }
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| 156 |
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| 157 | /* setup functions */
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| 158 |
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| 159 | static void
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| 160 | altcp_tcp_remove_callbacks(struct tcp_pcb *tpcb)
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| 161 | {
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| 162 | tcp_arg(tpcb, NULL);
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| 163 | tcp_recv(tpcb, NULL);
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| 164 | tcp_sent(tpcb, NULL);
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| 165 | tcp_err(tpcb, NULL);
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| 166 | tcp_poll(tpcb, NULL, tpcb->pollinterval);
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| 167 | }
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| 168 |
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| 169 | static void
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| 170 | altcp_tcp_setup_callbacks(struct altcp_pcb *conn, struct tcp_pcb *tpcb)
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| 171 | {
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| 172 | tcp_arg(tpcb, conn);
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| 173 | tcp_recv(tpcb, altcp_tcp_recv);
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| 174 | tcp_sent(tpcb, altcp_tcp_sent);
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| 175 | tcp_err(tpcb, altcp_tcp_err);
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| 176 | /* tcp_poll is set when interval is set by application */
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| 177 | /* listen is set totally different :-) */
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| 178 | }
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| 179 |
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| 180 | static void
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| 181 | altcp_tcp_setup(struct altcp_pcb *conn, struct tcp_pcb *tpcb)
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| 182 | {
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| 183 | altcp_tcp_setup_callbacks(conn, tpcb);
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| 184 | conn->state = tpcb;
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| 185 | conn->fns = &altcp_tcp_functions;
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| 186 | }
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| 187 |
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| 188 | struct altcp_pcb *
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| 189 | altcp_tcp_new_ip_type(u8_t ip_type)
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| 190 | {
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| 191 | /* Allocate the tcp pcb first to invoke the priority handling code
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| 192 | if we're out of pcbs */
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| 193 | struct tcp_pcb *tpcb = tcp_new_ip_type(ip_type);
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| 194 | if (tpcb != NULL) {
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| 195 | struct altcp_pcb *ret = altcp_alloc();
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| 196 | if (ret != NULL) {
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| 197 | altcp_tcp_setup(ret, tpcb);
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| 198 | return ret;
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| 199 | } else {
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| 200 | /* altcp_pcb allocation failed -> free the tcp_pcb too */
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| 201 | tcp_close(tpcb);
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| 202 | }
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| 203 | }
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| 204 | return NULL;
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| 205 | }
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| 206 |
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| 207 | /** altcp_tcp allocator function fitting to @ref altcp_allocator_t / @ref altcp_new.
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| 208 | *
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| 209 | * arg pointer is not used for TCP.
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| 210 | */
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| 211 | struct altcp_pcb *
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| 212 | altcp_tcp_alloc(void *arg, u8_t ip_type)
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| 213 | {
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| 214 | LWIP_UNUSED_ARG(arg);
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| 215 | return altcp_tcp_new_ip_type(ip_type);
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| 216 | }
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| 217 |
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| 218 | struct altcp_pcb *
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| 219 | altcp_tcp_wrap(struct tcp_pcb *tpcb)
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| 220 | {
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| 221 | if (tpcb != NULL) {
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| 222 | struct altcp_pcb *ret = altcp_alloc();
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| 223 | if (ret != NULL) {
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| 224 | altcp_tcp_setup(ret, tpcb);
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| 225 | return ret;
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| 226 | }
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| 227 | }
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| 228 | return NULL;
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| 229 | }
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| 230 |
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| 231 |
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| 232 | /* "virtual" functions calling into tcp */
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| 233 | static void
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| 234 | altcp_tcp_set_poll(struct altcp_pcb *conn, u8_t interval)
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| 235 | {
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| 236 | if (conn != NULL) {
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| 237 | struct tcp_pcb *pcb = (struct tcp_pcb *)conn->state;
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| 238 | ALTCP_TCP_ASSERT_CONN(conn);
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| 239 | tcp_poll(pcb, altcp_tcp_poll, interval);
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| 240 | }
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| 241 | }
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| 242 |
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| 243 | static void
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| 244 | altcp_tcp_recved(struct altcp_pcb *conn, u16_t len)
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| 245 | {
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| 246 | if (conn != NULL) {
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| 247 | struct tcp_pcb *pcb = (struct tcp_pcb *)conn->state;
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| 248 | ALTCP_TCP_ASSERT_CONN(conn);
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| 249 | tcp_recved(pcb, len);
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| 250 | }
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| 251 | }
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| 252 |
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| 253 | static err_t
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| 254 | altcp_tcp_bind(struct altcp_pcb *conn, const ip_addr_t *ipaddr, u16_t port)
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| 255 | {
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| 256 | struct tcp_pcb *pcb;
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| 257 | if (conn == NULL) {
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| 258 | return ERR_VAL;
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| 259 | }
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| 260 | ALTCP_TCP_ASSERT_CONN(conn);
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| 261 | pcb = (struct tcp_pcb *)conn->state;
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| 262 | return tcp_bind(pcb, ipaddr, port);
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| 263 | }
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| 264 |
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| 265 | static err_t
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| 266 | altcp_tcp_connect(struct altcp_pcb *conn, const ip_addr_t *ipaddr, u16_t port, altcp_connected_fn connected)
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| 267 | {
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| 268 | struct tcp_pcb *pcb;
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| 269 | if (conn == NULL) {
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| 270 | return ERR_VAL;
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| 271 | }
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| 272 | ALTCP_TCP_ASSERT_CONN(conn);
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| 273 | conn->connected = connected;
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| 274 | pcb = (struct tcp_pcb *)conn->state;
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| 275 | return tcp_connect(pcb, ipaddr, port, altcp_tcp_connected);
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| 276 | }
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| 277 |
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| 278 | static struct altcp_pcb *
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| 279 | altcp_tcp_listen(struct altcp_pcb *conn, u8_t backlog, err_t *err)
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| 280 | {
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| 281 | struct tcp_pcb *pcb;
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| 282 | struct tcp_pcb *lpcb;
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| 283 | if (conn == NULL) {
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| 284 | return NULL;
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| 285 | }
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| 286 | ALTCP_TCP_ASSERT_CONN(conn);
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| 287 | pcb = (struct tcp_pcb *)conn->state;
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| 288 | lpcb = tcp_listen_with_backlog_and_err(pcb, backlog, err);
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| 289 | if (lpcb != NULL) {
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| 290 | conn->state = lpcb;
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| 291 | tcp_accept(lpcb, altcp_tcp_accept);
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| 292 | return conn;
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| 293 | }
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| 294 | return NULL;
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| 295 | }
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| 296 |
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| 297 | static void
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| 298 | altcp_tcp_abort(struct altcp_pcb *conn)
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| 299 | {
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| 300 | if (conn != NULL) {
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| 301 | struct tcp_pcb *pcb = (struct tcp_pcb *)conn->state;
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| 302 | ALTCP_TCP_ASSERT_CONN(conn);
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| 303 | if (pcb) {
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| 304 | tcp_abort(pcb);
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| 305 | }
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| 306 | }
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| 307 | }
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| 308 |
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| 309 | static err_t
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| 310 | altcp_tcp_close(struct altcp_pcb *conn)
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| 311 | {
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| 312 | struct tcp_pcb *pcb;
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| 313 | if (conn == NULL) {
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| 314 | return ERR_VAL;
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| 315 | }
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| 316 | ALTCP_TCP_ASSERT_CONN(conn);
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| 317 | pcb = (struct tcp_pcb *)conn->state;
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| 318 | if (pcb) {
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| 319 | err_t err;
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| 320 | tcp_poll_fn oldpoll = pcb->poll;
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| 321 | altcp_tcp_remove_callbacks(pcb);
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| 322 | err = tcp_close(pcb);
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| 323 | if (err != ERR_OK) {
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| 324 | /* not closed, set up all callbacks again */
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| 325 | altcp_tcp_setup_callbacks(conn, pcb);
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| 326 | /* poll callback is not included in the above */
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| 327 | tcp_poll(pcb, oldpoll, pcb->pollinterval);
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| 328 | return err;
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| 329 | }
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| 330 | conn->state = NULL; /* unsafe to reference pcb after tcp_close(). */
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| 331 | }
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| 332 | altcp_free(conn);
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| 333 | return ERR_OK;
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| 334 | }
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| 335 |
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| 336 | static err_t
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| 337 | altcp_tcp_shutdown(struct altcp_pcb *conn, int shut_rx, int shut_tx)
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| 338 | {
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| 339 | struct tcp_pcb *pcb;
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| 340 | if (conn == NULL) {
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| 341 | return ERR_VAL;
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| 342 | }
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| 343 | ALTCP_TCP_ASSERT_CONN(conn);
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| 344 | pcb = (struct tcp_pcb *)conn->state;
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| 345 | return tcp_shutdown(pcb, shut_rx, shut_tx);
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| 346 | }
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| 347 |
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| 348 | static err_t
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| 349 | altcp_tcp_write(struct altcp_pcb *conn, const void *dataptr, u16_t len, u8_t apiflags)
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| 350 | {
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| 351 | struct tcp_pcb *pcb;
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| 352 | if (conn == NULL) {
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| 353 | return ERR_VAL;
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| 354 | }
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| 355 | ALTCP_TCP_ASSERT_CONN(conn);
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| 356 | pcb = (struct tcp_pcb *)conn->state;
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| 357 | return tcp_write(pcb, dataptr, len, apiflags);
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| 358 | }
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| 359 |
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| 360 | static err_t
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| 361 | altcp_tcp_output(struct altcp_pcb *conn)
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| 362 | {
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| 363 | struct tcp_pcb *pcb;
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| 364 | if (conn == NULL) {
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| 365 | return ERR_VAL;
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| 366 | }
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| 367 | ALTCP_TCP_ASSERT_CONN(conn);
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| 368 | pcb = (struct tcp_pcb *)conn->state;
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| 369 | return tcp_output(pcb);
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| 370 | }
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| 371 |
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| 372 | static u16_t
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| 373 | altcp_tcp_mss(struct altcp_pcb *conn)
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| 374 | {
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| 375 | struct tcp_pcb *pcb;
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| 376 | if (conn == NULL) {
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| 377 | return 0;
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| 378 | }
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| 379 | ALTCP_TCP_ASSERT_CONN(conn);
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| 380 | pcb = (struct tcp_pcb *)conn->state;
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| 381 | return tcp_mss(pcb);
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| 382 | }
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| 383 |
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| 384 | static u16_t
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| 385 | altcp_tcp_sndbuf(struct altcp_pcb *conn)
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| 386 | {
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| 387 | struct tcp_pcb *pcb;
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| 388 | if (conn == NULL) {
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| 389 | return 0;
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| 390 | }
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| 391 | ALTCP_TCP_ASSERT_CONN(conn);
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| 392 | pcb = (struct tcp_pcb *)conn->state;
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| 393 | return tcp_sndbuf(pcb);
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| 394 | }
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| 395 |
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| 396 | static u16_t
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| 397 | altcp_tcp_sndqueuelen(struct altcp_pcb *conn)
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| 398 | {
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| 399 | struct tcp_pcb *pcb;
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| 400 | if (conn == NULL) {
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| 401 | return 0;
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| 402 | }
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| 403 | ALTCP_TCP_ASSERT_CONN(conn);
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| 404 | pcb = (struct tcp_pcb *)conn->state;
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| 405 | return tcp_sndqueuelen(pcb);
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| 406 | }
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| 407 |
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| 408 | static void
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| 409 | altcp_tcp_nagle_disable(struct altcp_pcb *conn)
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| 410 | {
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| 411 | if (conn && conn->state) {
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| 412 | struct tcp_pcb *pcb = (struct tcp_pcb *)conn->state;
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| 413 | ALTCP_TCP_ASSERT_CONN(conn);
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| 414 | tcp_nagle_disable(pcb);
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| 415 | }
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| 416 | }
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| 417 |
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| 418 | static void
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| 419 | altcp_tcp_nagle_enable(struct altcp_pcb *conn)
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| 420 | {
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| 421 | if (conn && conn->state) {
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| 422 | struct tcp_pcb *pcb = (struct tcp_pcb *)conn->state;
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| 423 | ALTCP_TCP_ASSERT_CONN(conn);
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| 424 | tcp_nagle_enable(pcb);
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| 425 | }
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| 426 | }
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| 427 |
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| 428 | static int
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| 429 | altcp_tcp_nagle_disabled(struct altcp_pcb *conn)
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| 430 | {
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| 431 | if (conn && conn->state) {
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| 432 | struct tcp_pcb *pcb = (struct tcp_pcb *)conn->state;
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| 433 | ALTCP_TCP_ASSERT_CONN(conn);
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| 434 | return tcp_nagle_disabled(pcb);
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| 435 | }
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| 436 | return 0;
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| 437 | }
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| 438 |
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| 439 | static void
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| 440 | altcp_tcp_setprio(struct altcp_pcb *conn, u8_t prio)
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| 441 | {
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| 442 | if (conn != NULL) {
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| 443 | struct tcp_pcb *pcb = (struct tcp_pcb *)conn->state;
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| 444 | ALTCP_TCP_ASSERT_CONN(conn);
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| 445 | tcp_setprio(pcb, prio);
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| 446 | }
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| 447 | }
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| 448 |
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| 449 | static void
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| 450 | altcp_tcp_dealloc(struct altcp_pcb *conn)
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| 451 | {
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| 452 | LWIP_UNUSED_ARG(conn);
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| 453 | ALTCP_TCP_ASSERT_CONN(conn);
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| 454 | /* no private state to clean up */
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| 455 | }
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| 456 |
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| 457 | static err_t
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| 458 | altcp_tcp_get_tcp_addrinfo(struct altcp_pcb *conn, int local, ip_addr_t *addr, u16_t *port)
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| 459 | {
|
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| 460 | if (conn) {
|
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| 461 | struct tcp_pcb *pcb = (struct tcp_pcb *)conn->state;
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| 462 | ALTCP_TCP_ASSERT_CONN(conn);
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| 463 | return tcp_tcp_get_tcp_addrinfo(pcb, local, addr, port);
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| 464 | }
|
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| 465 | return ERR_VAL;
|
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| 466 | }
|
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| 467 |
|
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| 468 | static ip_addr_t *
|
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| 469 | altcp_tcp_get_ip(struct altcp_pcb *conn, int local)
|
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| 470 | {
|
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| 471 | if (conn) {
|
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| 472 | struct tcp_pcb *pcb = (struct tcp_pcb *)conn->state;
|
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| 473 | ALTCP_TCP_ASSERT_CONN(conn);
|
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| 474 | if (pcb) {
|
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| 475 | if (local) {
|
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| 476 | return &pcb->local_ip;
|
---|
| 477 | } else {
|
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| 478 | return &pcb->remote_ip;
|
---|
| 479 | }
|
---|
| 480 | }
|
---|
| 481 | }
|
---|
| 482 | return NULL;
|
---|
| 483 | }
|
---|
| 484 |
|
---|
| 485 | static u16_t
|
---|
| 486 | altcp_tcp_get_port(struct altcp_pcb *conn, int local)
|
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| 487 | {
|
---|
| 488 | if (conn) {
|
---|
| 489 | struct tcp_pcb *pcb = (struct tcp_pcb *)conn->state;
|
---|
| 490 | ALTCP_TCP_ASSERT_CONN(conn);
|
---|
| 491 | if (pcb) {
|
---|
| 492 | if (local) {
|
---|
| 493 | return pcb->local_port;
|
---|
| 494 | } else {
|
---|
| 495 | return pcb->remote_port;
|
---|
| 496 | }
|
---|
| 497 | }
|
---|
| 498 | }
|
---|
| 499 | return 0;
|
---|
| 500 | }
|
---|
| 501 |
|
---|
| 502 | #ifdef LWIP_DEBUG
|
---|
| 503 | static enum tcp_state
|
---|
| 504 | altcp_tcp_dbg_get_tcp_state(struct altcp_pcb *conn)
|
---|
| 505 | {
|
---|
| 506 | if (conn) {
|
---|
| 507 | struct tcp_pcb *pcb = (struct tcp_pcb *)conn->state;
|
---|
| 508 | ALTCP_TCP_ASSERT_CONN(conn);
|
---|
| 509 | if (pcb) {
|
---|
| 510 | return pcb->state;
|
---|
| 511 | }
|
---|
| 512 | }
|
---|
| 513 | return CLOSED;
|
---|
| 514 | }
|
---|
| 515 | #endif
|
---|
| 516 | const struct altcp_functions altcp_tcp_functions = {
|
---|
| 517 | altcp_tcp_set_poll,
|
---|
| 518 | altcp_tcp_recved,
|
---|
| 519 | altcp_tcp_bind,
|
---|
| 520 | altcp_tcp_connect,
|
---|
| 521 | altcp_tcp_listen,
|
---|
| 522 | altcp_tcp_abort,
|
---|
| 523 | altcp_tcp_close,
|
---|
| 524 | altcp_tcp_shutdown,
|
---|
| 525 | altcp_tcp_write,
|
---|
| 526 | altcp_tcp_output,
|
---|
| 527 | altcp_tcp_mss,
|
---|
| 528 | altcp_tcp_sndbuf,
|
---|
| 529 | altcp_tcp_sndqueuelen,
|
---|
| 530 | altcp_tcp_nagle_disable,
|
---|
| 531 | altcp_tcp_nagle_enable,
|
---|
| 532 | altcp_tcp_nagle_disabled,
|
---|
| 533 | altcp_tcp_setprio,
|
---|
| 534 | altcp_tcp_dealloc,
|
---|
| 535 | altcp_tcp_get_tcp_addrinfo,
|
---|
| 536 | altcp_tcp_get_ip,
|
---|
| 537 | altcp_tcp_get_port
|
---|
| 538 | #ifdef LWIP_DEBUG
|
---|
| 539 | , altcp_tcp_dbg_get_tcp_state
|
---|
| 540 | #endif
|
---|
| 541 | };
|
---|
| 542 |
|
---|
| 543 | #endif /* LWIP_ALTCP */
|
---|