My fork of the HTTPServer (working)
Core/lwIP/core/tcp.c@0:7a64fbb4069d, 2012-08-06 (annotated)
- Committer:
- screamer
- Date:
- Mon Aug 06 09:23:14 2012 +0000
- Revision:
- 0:7a64fbb4069d
[mbed] converted /DGWWebServer/HTTPServer
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
screamer | 0:7a64fbb4069d | 1 | /** |
screamer | 0:7a64fbb4069d | 2 | * @file |
screamer | 0:7a64fbb4069d | 3 | * Transmission Control Protocol for IP |
screamer | 0:7a64fbb4069d | 4 | * |
screamer | 0:7a64fbb4069d | 5 | * This file contains common functions for the TCP implementation, such as functinos |
screamer | 0:7a64fbb4069d | 6 | * for manipulating the data structures and the TCP timer functions. TCP functions |
screamer | 0:7a64fbb4069d | 7 | * related to input and output is found in tcp_in.c and tcp_out.c respectively. |
screamer | 0:7a64fbb4069d | 8 | * |
screamer | 0:7a64fbb4069d | 9 | */ |
screamer | 0:7a64fbb4069d | 10 | |
screamer | 0:7a64fbb4069d | 11 | /* |
screamer | 0:7a64fbb4069d | 12 | * Copyright (c) 2001-2004 Swedish Institute of Computer Science. |
screamer | 0:7a64fbb4069d | 13 | * All rights reserved. |
screamer | 0:7a64fbb4069d | 14 | * |
screamer | 0:7a64fbb4069d | 15 | * Redistribution and use in source and binary forms, with or without modification, |
screamer | 0:7a64fbb4069d | 16 | * are permitted provided that the following conditions are met: |
screamer | 0:7a64fbb4069d | 17 | * |
screamer | 0:7a64fbb4069d | 18 | * 1. Redistributions of source code must retain the above copyright notice, |
screamer | 0:7a64fbb4069d | 19 | * this list of conditions and the following disclaimer. |
screamer | 0:7a64fbb4069d | 20 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
screamer | 0:7a64fbb4069d | 21 | * this list of conditions and the following disclaimer in the documentation |
screamer | 0:7a64fbb4069d | 22 | * and/or other materials provided with the distribution. |
screamer | 0:7a64fbb4069d | 23 | * 3. The name of the author may not be used to endorse or promote products |
screamer | 0:7a64fbb4069d | 24 | * derived from this software without specific prior written permission. |
screamer | 0:7a64fbb4069d | 25 | * |
screamer | 0:7a64fbb4069d | 26 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
screamer | 0:7a64fbb4069d | 27 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
screamer | 0:7a64fbb4069d | 28 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT |
screamer | 0:7a64fbb4069d | 29 | * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
screamer | 0:7a64fbb4069d | 30 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT |
screamer | 0:7a64fbb4069d | 31 | * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
screamer | 0:7a64fbb4069d | 32 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
screamer | 0:7a64fbb4069d | 33 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
screamer | 0:7a64fbb4069d | 34 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY |
screamer | 0:7a64fbb4069d | 35 | * OF SUCH DAMAGE. |
screamer | 0:7a64fbb4069d | 36 | * |
screamer | 0:7a64fbb4069d | 37 | * This file is part of the lwIP TCP/IP stack. |
screamer | 0:7a64fbb4069d | 38 | * |
screamer | 0:7a64fbb4069d | 39 | * Author: Adam Dunkels <adam@sics.se> |
screamer | 0:7a64fbb4069d | 40 | * |
screamer | 0:7a64fbb4069d | 41 | */ |
screamer | 0:7a64fbb4069d | 42 | |
screamer | 0:7a64fbb4069d | 43 | #include "lwip/opt.h" |
screamer | 0:7a64fbb4069d | 44 | |
screamer | 0:7a64fbb4069d | 45 | #if LWIP_TCP /* don't build if not configured for use in lwipopts.h */ |
screamer | 0:7a64fbb4069d | 46 | |
screamer | 0:7a64fbb4069d | 47 | #include "lwip/def.h" |
screamer | 0:7a64fbb4069d | 48 | #include "lwip/mem.h" |
screamer | 0:7a64fbb4069d | 49 | #include "lwip/memp.h" |
screamer | 0:7a64fbb4069d | 50 | #include "lwip/snmp.h" |
screamer | 0:7a64fbb4069d | 51 | #include "lwip/tcp.h" |
screamer | 0:7a64fbb4069d | 52 | |
screamer | 0:7a64fbb4069d | 53 | #include <string.h> |
screamer | 0:7a64fbb4069d | 54 | |
screamer | 0:7a64fbb4069d | 55 | /* Incremented every coarse grained timer shot (typically every 500 ms). */ |
screamer | 0:7a64fbb4069d | 56 | u32_t tcp_ticks; |
screamer | 0:7a64fbb4069d | 57 | const u8_t tcp_backoff[13] = |
screamer | 0:7a64fbb4069d | 58 | { 1, 2, 3, 4, 5, 6, 7, 7, 7, 7, 7, 7, 7}; |
screamer | 0:7a64fbb4069d | 59 | /* Times per slowtmr hits */ |
screamer | 0:7a64fbb4069d | 60 | const u8_t tcp_persist_backoff[7] = { 3, 6, 12, 24, 48, 96, 120 }; |
screamer | 0:7a64fbb4069d | 61 | |
screamer | 0:7a64fbb4069d | 62 | /* The TCP PCB lists. */ |
screamer | 0:7a64fbb4069d | 63 | |
screamer | 0:7a64fbb4069d | 64 | /** List of all TCP PCBs bound but not yet (connected || listening) */ |
screamer | 0:7a64fbb4069d | 65 | struct tcp_pcb *tcp_bound_pcbs; |
screamer | 0:7a64fbb4069d | 66 | /** List of all TCP PCBs in LISTEN state */ |
screamer | 0:7a64fbb4069d | 67 | union tcp_listen_pcbs_t tcp_listen_pcbs; |
screamer | 0:7a64fbb4069d | 68 | /** List of all TCP PCBs that are in a state in which |
screamer | 0:7a64fbb4069d | 69 | * they accept or send data. */ |
screamer | 0:7a64fbb4069d | 70 | struct tcp_pcb *tcp_active_pcbs; |
screamer | 0:7a64fbb4069d | 71 | /** List of all TCP PCBs in TIME-WAIT state */ |
screamer | 0:7a64fbb4069d | 72 | struct tcp_pcb *tcp_tw_pcbs; |
screamer | 0:7a64fbb4069d | 73 | |
screamer | 0:7a64fbb4069d | 74 | struct tcp_pcb *tcp_tmp_pcb; |
screamer | 0:7a64fbb4069d | 75 | |
screamer | 0:7a64fbb4069d | 76 | static u8_t tcp_timer; |
screamer | 0:7a64fbb4069d | 77 | static u16_t tcp_new_port(void); |
screamer | 0:7a64fbb4069d | 78 | |
screamer | 0:7a64fbb4069d | 79 | /** |
screamer | 0:7a64fbb4069d | 80 | * Called periodically to dispatch TCP timers. |
screamer | 0:7a64fbb4069d | 81 | * |
screamer | 0:7a64fbb4069d | 82 | */ |
screamer | 0:7a64fbb4069d | 83 | void |
screamer | 0:7a64fbb4069d | 84 | tcp_tmr(void) |
screamer | 0:7a64fbb4069d | 85 | { |
screamer | 0:7a64fbb4069d | 86 | /* Call tcp_fasttmr() every 250 ms */ |
screamer | 0:7a64fbb4069d | 87 | tcp_fasttmr(); |
screamer | 0:7a64fbb4069d | 88 | |
screamer | 0:7a64fbb4069d | 89 | if (++tcp_timer & 1) { |
screamer | 0:7a64fbb4069d | 90 | /* Call tcp_tmr() every 500 ms, i.e., every other timer |
screamer | 0:7a64fbb4069d | 91 | tcp_tmr() is called. */ |
screamer | 0:7a64fbb4069d | 92 | tcp_slowtmr(); |
screamer | 0:7a64fbb4069d | 93 | } |
screamer | 0:7a64fbb4069d | 94 | } |
screamer | 0:7a64fbb4069d | 95 | |
screamer | 0:7a64fbb4069d | 96 | /** |
screamer | 0:7a64fbb4069d | 97 | * Closes the connection held by the PCB. |
screamer | 0:7a64fbb4069d | 98 | * |
screamer | 0:7a64fbb4069d | 99 | * Listening pcbs are freed and may not be referenced any more. |
screamer | 0:7a64fbb4069d | 100 | * Connection pcbs are freed if not yet connected and may not be referenced |
screamer | 0:7a64fbb4069d | 101 | * any more. If a connection is established (at least SYN received or in |
screamer | 0:7a64fbb4069d | 102 | * a closing state), the connection is closed, and put in a closing state. |
screamer | 0:7a64fbb4069d | 103 | * The pcb is then automatically freed in tcp_slowtmr(). It is therefore |
screamer | 0:7a64fbb4069d | 104 | * unsafe to reference it. |
screamer | 0:7a64fbb4069d | 105 | * |
screamer | 0:7a64fbb4069d | 106 | * @param pcb the tcp_pcb to close |
screamer | 0:7a64fbb4069d | 107 | * @return ERR_OK if connection has been closed |
screamer | 0:7a64fbb4069d | 108 | * another err_t if closing failed and pcb is not freed |
screamer | 0:7a64fbb4069d | 109 | */ |
screamer | 0:7a64fbb4069d | 110 | err_t |
screamer | 0:7a64fbb4069d | 111 | tcp_close(struct tcp_pcb *pcb) |
screamer | 0:7a64fbb4069d | 112 | { |
screamer | 0:7a64fbb4069d | 113 | err_t err; |
screamer | 0:7a64fbb4069d | 114 | |
screamer | 0:7a64fbb4069d | 115 | #if TCP_DEBUG |
screamer | 0:7a64fbb4069d | 116 | LWIP_DEBUGF(TCP_DEBUG, ("tcp_close: closing in ")); |
screamer | 0:7a64fbb4069d | 117 | tcp_debug_print_state(pcb->state); |
screamer | 0:7a64fbb4069d | 118 | #endif /* TCP_DEBUG */ |
screamer | 0:7a64fbb4069d | 119 | |
screamer | 0:7a64fbb4069d | 120 | switch (pcb->state) { |
screamer | 0:7a64fbb4069d | 121 | case CLOSED: |
screamer | 0:7a64fbb4069d | 122 | /* Closing a pcb in the CLOSED state might seem erroneous, |
screamer | 0:7a64fbb4069d | 123 | * however, it is in this state once allocated and as yet unused |
screamer | 0:7a64fbb4069d | 124 | * and the user needs some way to free it should the need arise. |
screamer | 0:7a64fbb4069d | 125 | * Calling tcp_close() with a pcb that has already been closed, (i.e. twice) |
screamer | 0:7a64fbb4069d | 126 | * or for a pcb that has been used and then entered the CLOSED state |
screamer | 0:7a64fbb4069d | 127 | * is erroneous, but this should never happen as the pcb has in those cases |
screamer | 0:7a64fbb4069d | 128 | * been freed, and so any remaining handles are bogus. */ |
screamer | 0:7a64fbb4069d | 129 | err = ERR_OK; |
screamer | 0:7a64fbb4069d | 130 | TCP_RMV(&tcp_bound_pcbs, pcb); |
screamer | 0:7a64fbb4069d | 131 | memp_free(MEMP_TCP_PCB, pcb); |
screamer | 0:7a64fbb4069d | 132 | pcb = NULL; |
screamer | 0:7a64fbb4069d | 133 | break; |
screamer | 0:7a64fbb4069d | 134 | case LISTEN: |
screamer | 0:7a64fbb4069d | 135 | err = ERR_OK; |
screamer | 0:7a64fbb4069d | 136 | tcp_pcb_remove((struct tcp_pcb **)&tcp_listen_pcbs.pcbs, pcb); |
screamer | 0:7a64fbb4069d | 137 | memp_free(MEMP_TCP_PCB_LISTEN, pcb); |
screamer | 0:7a64fbb4069d | 138 | pcb = NULL; |
screamer | 0:7a64fbb4069d | 139 | break; |
screamer | 0:7a64fbb4069d | 140 | case SYN_SENT: |
screamer | 0:7a64fbb4069d | 141 | err = ERR_OK; |
screamer | 0:7a64fbb4069d | 142 | tcp_pcb_remove(&tcp_active_pcbs, pcb); |
screamer | 0:7a64fbb4069d | 143 | memp_free(MEMP_TCP_PCB, pcb); |
screamer | 0:7a64fbb4069d | 144 | pcb = NULL; |
screamer | 0:7a64fbb4069d | 145 | snmp_inc_tcpattemptfails(); |
screamer | 0:7a64fbb4069d | 146 | break; |
screamer | 0:7a64fbb4069d | 147 | case SYN_RCVD: |
screamer | 0:7a64fbb4069d | 148 | err = tcp_send_ctrl(pcb, TCP_FIN); |
screamer | 0:7a64fbb4069d | 149 | if (err == ERR_OK) { |
screamer | 0:7a64fbb4069d | 150 | snmp_inc_tcpattemptfails(); |
screamer | 0:7a64fbb4069d | 151 | pcb->state = FIN_WAIT_1; |
screamer | 0:7a64fbb4069d | 152 | } |
screamer | 0:7a64fbb4069d | 153 | break; |
screamer | 0:7a64fbb4069d | 154 | case ESTABLISHED: |
screamer | 0:7a64fbb4069d | 155 | err = tcp_send_ctrl(pcb, TCP_FIN); |
screamer | 0:7a64fbb4069d | 156 | if (err == ERR_OK) { |
screamer | 0:7a64fbb4069d | 157 | snmp_inc_tcpestabresets(); |
screamer | 0:7a64fbb4069d | 158 | pcb->state = FIN_WAIT_1; |
screamer | 0:7a64fbb4069d | 159 | } |
screamer | 0:7a64fbb4069d | 160 | break; |
screamer | 0:7a64fbb4069d | 161 | case CLOSE_WAIT: |
screamer | 0:7a64fbb4069d | 162 | err = tcp_send_ctrl(pcb, TCP_FIN); |
screamer | 0:7a64fbb4069d | 163 | if (err == ERR_OK) { |
screamer | 0:7a64fbb4069d | 164 | snmp_inc_tcpestabresets(); |
screamer | 0:7a64fbb4069d | 165 | pcb->state = LAST_ACK; |
screamer | 0:7a64fbb4069d | 166 | } |
screamer | 0:7a64fbb4069d | 167 | break; |
screamer | 0:7a64fbb4069d | 168 | default: |
screamer | 0:7a64fbb4069d | 169 | /* Has already been closed, do nothing. */ |
screamer | 0:7a64fbb4069d | 170 | err = ERR_OK; |
screamer | 0:7a64fbb4069d | 171 | pcb = NULL; |
screamer | 0:7a64fbb4069d | 172 | break; |
screamer | 0:7a64fbb4069d | 173 | } |
screamer | 0:7a64fbb4069d | 174 | |
screamer | 0:7a64fbb4069d | 175 | if (pcb != NULL && err == ERR_OK) { |
screamer | 0:7a64fbb4069d | 176 | /* To ensure all data has been sent when tcp_close returns, we have |
screamer | 0:7a64fbb4069d | 177 | to make sure tcp_output doesn't fail. |
screamer | 0:7a64fbb4069d | 178 | Since we don't really have to ensure all data has been sent when tcp_close |
screamer | 0:7a64fbb4069d | 179 | returns (unsent data is sent from tcp timer functions, also), we don't care |
screamer | 0:7a64fbb4069d | 180 | for the return value of tcp_output for now. */ |
screamer | 0:7a64fbb4069d | 181 | /* @todo: When implementing SO_LINGER, this must be changed somehow: |
screamer | 0:7a64fbb4069d | 182 | If SOF_LINGER is set, the data should be sent when tcp_close returns. */ |
screamer | 0:7a64fbb4069d | 183 | tcp_output(pcb); |
screamer | 0:7a64fbb4069d | 184 | } |
screamer | 0:7a64fbb4069d | 185 | return err; |
screamer | 0:7a64fbb4069d | 186 | } |
screamer | 0:7a64fbb4069d | 187 | |
screamer | 0:7a64fbb4069d | 188 | /** |
screamer | 0:7a64fbb4069d | 189 | * Abandons a connection and optionally sends a RST to the remote |
screamer | 0:7a64fbb4069d | 190 | * host. Deletes the local protocol control block. This is done when |
screamer | 0:7a64fbb4069d | 191 | * a connection is killed because of shortage of memory. |
screamer | 0:7a64fbb4069d | 192 | * |
screamer | 0:7a64fbb4069d | 193 | * @param pcb the tcp_pcb to abort |
screamer | 0:7a64fbb4069d | 194 | * @param reset boolean to indicate whether a reset should be sent |
screamer | 0:7a64fbb4069d | 195 | */ |
screamer | 0:7a64fbb4069d | 196 | void |
screamer | 0:7a64fbb4069d | 197 | tcp_abandon(struct tcp_pcb *pcb, int reset) |
screamer | 0:7a64fbb4069d | 198 | { |
screamer | 0:7a64fbb4069d | 199 | u32_t seqno, ackno; |
screamer | 0:7a64fbb4069d | 200 | u16_t remote_port, local_port; |
screamer | 0:7a64fbb4069d | 201 | struct ip_addr remote_ip, local_ip; |
screamer | 0:7a64fbb4069d | 202 | #if LWIP_CALLBACK_API |
screamer | 0:7a64fbb4069d | 203 | void (* errf)(void *arg, err_t err); |
screamer | 0:7a64fbb4069d | 204 | #endif /* LWIP_CALLBACK_API */ |
screamer | 0:7a64fbb4069d | 205 | void *errf_arg; |
screamer | 0:7a64fbb4069d | 206 | |
screamer | 0:7a64fbb4069d | 207 | |
screamer | 0:7a64fbb4069d | 208 | /* Figure out on which TCP PCB list we are, and remove us. If we |
screamer | 0:7a64fbb4069d | 209 | are in an active state, call the receive function associated with |
screamer | 0:7a64fbb4069d | 210 | the PCB with a NULL argument, and send an RST to the remote end. */ |
screamer | 0:7a64fbb4069d | 211 | if (pcb->state == TIME_WAIT) { |
screamer | 0:7a64fbb4069d | 212 | tcp_pcb_remove(&tcp_tw_pcbs, pcb); |
screamer | 0:7a64fbb4069d | 213 | memp_free(MEMP_TCP_PCB, pcb); |
screamer | 0:7a64fbb4069d | 214 | } else { |
screamer | 0:7a64fbb4069d | 215 | seqno = pcb->snd_nxt; |
screamer | 0:7a64fbb4069d | 216 | ackno = pcb->rcv_nxt; |
screamer | 0:7a64fbb4069d | 217 | ip_addr_set(&local_ip, &(pcb->local_ip)); |
screamer | 0:7a64fbb4069d | 218 | ip_addr_set(&remote_ip, &(pcb->remote_ip)); |
screamer | 0:7a64fbb4069d | 219 | local_port = pcb->local_port; |
screamer | 0:7a64fbb4069d | 220 | remote_port = pcb->remote_port; |
screamer | 0:7a64fbb4069d | 221 | #if LWIP_CALLBACK_API |
screamer | 0:7a64fbb4069d | 222 | errf = pcb->errf; |
screamer | 0:7a64fbb4069d | 223 | #endif /* LWIP_CALLBACK_API */ |
screamer | 0:7a64fbb4069d | 224 | errf_arg = pcb->callback_arg; |
screamer | 0:7a64fbb4069d | 225 | tcp_pcb_remove(&tcp_active_pcbs, pcb); |
screamer | 0:7a64fbb4069d | 226 | if (pcb->unacked != NULL) { |
screamer | 0:7a64fbb4069d | 227 | tcp_segs_free(pcb->unacked); |
screamer | 0:7a64fbb4069d | 228 | } |
screamer | 0:7a64fbb4069d | 229 | if (pcb->unsent != NULL) { |
screamer | 0:7a64fbb4069d | 230 | tcp_segs_free(pcb->unsent); |
screamer | 0:7a64fbb4069d | 231 | } |
screamer | 0:7a64fbb4069d | 232 | #if TCP_QUEUE_OOSEQ |
screamer | 0:7a64fbb4069d | 233 | if (pcb->ooseq != NULL) { |
screamer | 0:7a64fbb4069d | 234 | tcp_segs_free(pcb->ooseq); |
screamer | 0:7a64fbb4069d | 235 | } |
screamer | 0:7a64fbb4069d | 236 | #endif /* TCP_QUEUE_OOSEQ */ |
screamer | 0:7a64fbb4069d | 237 | memp_free(MEMP_TCP_PCB, pcb); |
screamer | 0:7a64fbb4069d | 238 | TCP_EVENT_ERR(errf, errf_arg, ERR_ABRT); |
screamer | 0:7a64fbb4069d | 239 | if (reset) { |
screamer | 0:7a64fbb4069d | 240 | LWIP_DEBUGF(TCP_RST_DEBUG, ("tcp_abandon: sending RST\n")); |
screamer | 0:7a64fbb4069d | 241 | tcp_rst(seqno, ackno, &local_ip, &remote_ip, local_port, remote_port); |
screamer | 0:7a64fbb4069d | 242 | } |
screamer | 0:7a64fbb4069d | 243 | } |
screamer | 0:7a64fbb4069d | 244 | } |
screamer | 0:7a64fbb4069d | 245 | |
screamer | 0:7a64fbb4069d | 246 | /** |
screamer | 0:7a64fbb4069d | 247 | * Binds the connection to a local portnumber and IP address. If the |
screamer | 0:7a64fbb4069d | 248 | * IP address is not given (i.e., ipaddr == NULL), the IP address of |
screamer | 0:7a64fbb4069d | 249 | * the outgoing network interface is used instead. |
screamer | 0:7a64fbb4069d | 250 | * |
screamer | 0:7a64fbb4069d | 251 | * @param pcb the tcp_pcb to bind (no check is done whether this pcb is |
screamer | 0:7a64fbb4069d | 252 | * already bound!) |
screamer | 0:7a64fbb4069d | 253 | * @param ipaddr the local ip address to bind to (use IP_ADDR_ANY to bind |
screamer | 0:7a64fbb4069d | 254 | * to any local address |
screamer | 0:7a64fbb4069d | 255 | * @param port the local port to bind to |
screamer | 0:7a64fbb4069d | 256 | * @return ERR_USE if the port is already in use |
screamer | 0:7a64fbb4069d | 257 | * ERR_OK if bound |
screamer | 0:7a64fbb4069d | 258 | */ |
screamer | 0:7a64fbb4069d | 259 | err_t |
screamer | 0:7a64fbb4069d | 260 | tcp_bind(struct tcp_pcb *pcb, struct ip_addr *ipaddr, u16_t port) |
screamer | 0:7a64fbb4069d | 261 | { |
screamer | 0:7a64fbb4069d | 262 | struct tcp_pcb *cpcb; |
screamer | 0:7a64fbb4069d | 263 | |
screamer | 0:7a64fbb4069d | 264 | LWIP_ERROR("tcp_bind: can only bind in state CLOSED", pcb->state == CLOSED, return ERR_ISCONN); |
screamer | 0:7a64fbb4069d | 265 | |
screamer | 0:7a64fbb4069d | 266 | if (port == 0) { |
screamer | 0:7a64fbb4069d | 267 | port = tcp_new_port(); |
screamer | 0:7a64fbb4069d | 268 | } |
screamer | 0:7a64fbb4069d | 269 | /* Check if the address already is in use. */ |
screamer | 0:7a64fbb4069d | 270 | /* Check the listen pcbs. */ |
screamer | 0:7a64fbb4069d | 271 | for(cpcb = (struct tcp_pcb *)tcp_listen_pcbs.pcbs; |
screamer | 0:7a64fbb4069d | 272 | cpcb != NULL; cpcb = cpcb->next) { |
screamer | 0:7a64fbb4069d | 273 | if (cpcb->local_port == port) { |
screamer | 0:7a64fbb4069d | 274 | if (ip_addr_isany(&(cpcb->local_ip)) || |
screamer | 0:7a64fbb4069d | 275 | ip_addr_isany(ipaddr) || |
screamer | 0:7a64fbb4069d | 276 | ip_addr_cmp(&(cpcb->local_ip), ipaddr)) { |
screamer | 0:7a64fbb4069d | 277 | return ERR_USE; |
screamer | 0:7a64fbb4069d | 278 | } |
screamer | 0:7a64fbb4069d | 279 | } |
screamer | 0:7a64fbb4069d | 280 | } |
screamer | 0:7a64fbb4069d | 281 | /* Check the connected pcbs. */ |
screamer | 0:7a64fbb4069d | 282 | for(cpcb = tcp_active_pcbs; |
screamer | 0:7a64fbb4069d | 283 | cpcb != NULL; cpcb = cpcb->next) { |
screamer | 0:7a64fbb4069d | 284 | if (cpcb->local_port == port) { |
screamer | 0:7a64fbb4069d | 285 | if (ip_addr_isany(&(cpcb->local_ip)) || |
screamer | 0:7a64fbb4069d | 286 | ip_addr_isany(ipaddr) || |
screamer | 0:7a64fbb4069d | 287 | ip_addr_cmp(&(cpcb->local_ip), ipaddr)) { |
screamer | 0:7a64fbb4069d | 288 | return ERR_USE; |
screamer | 0:7a64fbb4069d | 289 | } |
screamer | 0:7a64fbb4069d | 290 | } |
screamer | 0:7a64fbb4069d | 291 | } |
screamer | 0:7a64fbb4069d | 292 | /* Check the bound, not yet connected pcbs. */ |
screamer | 0:7a64fbb4069d | 293 | for(cpcb = tcp_bound_pcbs; cpcb != NULL; cpcb = cpcb->next) { |
screamer | 0:7a64fbb4069d | 294 | if (cpcb->local_port == port) { |
screamer | 0:7a64fbb4069d | 295 | if (ip_addr_isany(&(cpcb->local_ip)) || |
screamer | 0:7a64fbb4069d | 296 | ip_addr_isany(ipaddr) || |
screamer | 0:7a64fbb4069d | 297 | ip_addr_cmp(&(cpcb->local_ip), ipaddr)) { |
screamer | 0:7a64fbb4069d | 298 | return ERR_USE; |
screamer | 0:7a64fbb4069d | 299 | } |
screamer | 0:7a64fbb4069d | 300 | } |
screamer | 0:7a64fbb4069d | 301 | } |
screamer | 0:7a64fbb4069d | 302 | /* @todo: until SO_REUSEADDR is implemented (see task #6995 on savannah), |
screamer | 0:7a64fbb4069d | 303 | * we have to check the pcbs in TIME-WAIT state, also: */ |
screamer | 0:7a64fbb4069d | 304 | for(cpcb = tcp_tw_pcbs; cpcb != NULL; cpcb = cpcb->next) { |
screamer | 0:7a64fbb4069d | 305 | if (cpcb->local_port == port) { |
screamer | 0:7a64fbb4069d | 306 | if (ip_addr_cmp(&(cpcb->local_ip), ipaddr)) { |
screamer | 0:7a64fbb4069d | 307 | return ERR_USE; |
screamer | 0:7a64fbb4069d | 308 | } |
screamer | 0:7a64fbb4069d | 309 | } |
screamer | 0:7a64fbb4069d | 310 | } |
screamer | 0:7a64fbb4069d | 311 | |
screamer | 0:7a64fbb4069d | 312 | if (!ip_addr_isany(ipaddr)) { |
screamer | 0:7a64fbb4069d | 313 | pcb->local_ip = *ipaddr; |
screamer | 0:7a64fbb4069d | 314 | } |
screamer | 0:7a64fbb4069d | 315 | pcb->local_port = port; |
screamer | 0:7a64fbb4069d | 316 | TCP_REG(&tcp_bound_pcbs, pcb); |
screamer | 0:7a64fbb4069d | 317 | LWIP_DEBUGF(TCP_DEBUG, ("tcp_bind: bind to port %"U16_F"\n", port)); |
screamer | 0:7a64fbb4069d | 318 | return ERR_OK; |
screamer | 0:7a64fbb4069d | 319 | } |
screamer | 0:7a64fbb4069d | 320 | #if LWIP_CALLBACK_API |
screamer | 0:7a64fbb4069d | 321 | /** |
screamer | 0:7a64fbb4069d | 322 | * Default accept callback if no accept callback is specified by the user. |
screamer | 0:7a64fbb4069d | 323 | */ |
screamer | 0:7a64fbb4069d | 324 | static err_t |
screamer | 0:7a64fbb4069d | 325 | tcp_accept_null(void *arg, struct tcp_pcb *pcb, err_t err) |
screamer | 0:7a64fbb4069d | 326 | { |
screamer | 0:7a64fbb4069d | 327 | LWIP_UNUSED_ARG(arg); |
screamer | 0:7a64fbb4069d | 328 | LWIP_UNUSED_ARG(pcb); |
screamer | 0:7a64fbb4069d | 329 | LWIP_UNUSED_ARG(err); |
screamer | 0:7a64fbb4069d | 330 | |
screamer | 0:7a64fbb4069d | 331 | return ERR_ABRT; |
screamer | 0:7a64fbb4069d | 332 | } |
screamer | 0:7a64fbb4069d | 333 | #endif /* LWIP_CALLBACK_API */ |
screamer | 0:7a64fbb4069d | 334 | |
screamer | 0:7a64fbb4069d | 335 | /** |
screamer | 0:7a64fbb4069d | 336 | * Set the state of the connection to be LISTEN, which means that it |
screamer | 0:7a64fbb4069d | 337 | * is able to accept incoming connections. The protocol control block |
screamer | 0:7a64fbb4069d | 338 | * is reallocated in order to consume less memory. Setting the |
screamer | 0:7a64fbb4069d | 339 | * connection to LISTEN is an irreversible process. |
screamer | 0:7a64fbb4069d | 340 | * |
screamer | 0:7a64fbb4069d | 341 | * @param pcb the original tcp_pcb |
screamer | 0:7a64fbb4069d | 342 | * @param backlog the incoming connections queue limit |
screamer | 0:7a64fbb4069d | 343 | * @return tcp_pcb used for listening, consumes less memory. |
screamer | 0:7a64fbb4069d | 344 | * |
screamer | 0:7a64fbb4069d | 345 | * @note The original tcp_pcb is freed. This function therefore has to be |
screamer | 0:7a64fbb4069d | 346 | * called like this: |
screamer | 0:7a64fbb4069d | 347 | * tpcb = tcp_listen(tpcb); |
screamer | 0:7a64fbb4069d | 348 | */ |
screamer | 0:7a64fbb4069d | 349 | struct tcp_pcb * |
screamer | 0:7a64fbb4069d | 350 | tcp_listen_with_backlog(struct tcp_pcb *pcb, u8_t backlog) |
screamer | 0:7a64fbb4069d | 351 | { |
screamer | 0:7a64fbb4069d | 352 | struct tcp_pcb_listen *lpcb; |
screamer | 0:7a64fbb4069d | 353 | |
screamer | 0:7a64fbb4069d | 354 | LWIP_UNUSED_ARG(backlog); |
screamer | 0:7a64fbb4069d | 355 | LWIP_ERROR("tcp_listen: pcb already connected", pcb->state == CLOSED, return NULL); |
screamer | 0:7a64fbb4069d | 356 | |
screamer | 0:7a64fbb4069d | 357 | /* already listening? */ |
screamer | 0:7a64fbb4069d | 358 | if (pcb->state == LISTEN) { |
screamer | 0:7a64fbb4069d | 359 | return pcb; |
screamer | 0:7a64fbb4069d | 360 | } |
screamer | 0:7a64fbb4069d | 361 | lpcb = (struct tcp_pcb_listen *)(memp_malloc(MEMP_TCP_PCB_LISTEN)); // static_cast<struct tcp_pcb_listen *>(x) |
screamer | 0:7a64fbb4069d | 362 | if (lpcb == NULL) { |
screamer | 0:7a64fbb4069d | 363 | return NULL; |
screamer | 0:7a64fbb4069d | 364 | } |
screamer | 0:7a64fbb4069d | 365 | lpcb->callback_arg = pcb->callback_arg; |
screamer | 0:7a64fbb4069d | 366 | lpcb->local_port = pcb->local_port; |
screamer | 0:7a64fbb4069d | 367 | lpcb->state = LISTEN; |
screamer | 0:7a64fbb4069d | 368 | lpcb->so_options = pcb->so_options; |
screamer | 0:7a64fbb4069d | 369 | lpcb->so_options |= SOF_ACCEPTCONN; |
screamer | 0:7a64fbb4069d | 370 | lpcb->ttl = pcb->ttl; |
screamer | 0:7a64fbb4069d | 371 | lpcb->tos = pcb->tos; |
screamer | 0:7a64fbb4069d | 372 | ip_addr_set(&lpcb->local_ip, &pcb->local_ip); |
screamer | 0:7a64fbb4069d | 373 | TCP_RMV(&tcp_bound_pcbs, pcb); |
screamer | 0:7a64fbb4069d | 374 | memp_free(MEMP_TCP_PCB, pcb); |
screamer | 0:7a64fbb4069d | 375 | #if LWIP_CALLBACK_API |
screamer | 0:7a64fbb4069d | 376 | lpcb->accept = tcp_accept_null; |
screamer | 0:7a64fbb4069d | 377 | #endif /* LWIP_CALLBACK_API */ |
screamer | 0:7a64fbb4069d | 378 | #if TCP_LISTEN_BACKLOG |
screamer | 0:7a64fbb4069d | 379 | lpcb->accepts_pending = 0; |
screamer | 0:7a64fbb4069d | 380 | lpcb->backlog = (backlog ? backlog : 1); |
screamer | 0:7a64fbb4069d | 381 | #endif /* TCP_LISTEN_BACKLOG */ |
screamer | 0:7a64fbb4069d | 382 | TCP_REG(&tcp_listen_pcbs.listen_pcbs, lpcb); |
screamer | 0:7a64fbb4069d | 383 | return (struct tcp_pcb *)lpcb; |
screamer | 0:7a64fbb4069d | 384 | } |
screamer | 0:7a64fbb4069d | 385 | |
screamer | 0:7a64fbb4069d | 386 | /** |
screamer | 0:7a64fbb4069d | 387 | * Update the state that tracks the available window space to advertise. |
screamer | 0:7a64fbb4069d | 388 | * |
screamer | 0:7a64fbb4069d | 389 | * Returns how much extra window would be advertised if we sent an |
screamer | 0:7a64fbb4069d | 390 | * update now. |
screamer | 0:7a64fbb4069d | 391 | */ |
screamer | 0:7a64fbb4069d | 392 | u32_t tcp_update_rcv_ann_wnd(struct tcp_pcb *pcb) |
screamer | 0:7a64fbb4069d | 393 | { |
screamer | 0:7a64fbb4069d | 394 | u32_t new_right_edge = pcb->rcv_nxt + pcb->rcv_wnd; |
screamer | 0:7a64fbb4069d | 395 | |
screamer | 0:7a64fbb4069d | 396 | if (TCP_SEQ_GEQ(new_right_edge, pcb->rcv_ann_right_edge + pcb->mss)) { |
screamer | 0:7a64fbb4069d | 397 | /* we can advertise more window */ |
screamer | 0:7a64fbb4069d | 398 | pcb->rcv_ann_wnd = pcb->rcv_wnd; |
screamer | 0:7a64fbb4069d | 399 | return new_right_edge - pcb->rcv_ann_right_edge; |
screamer | 0:7a64fbb4069d | 400 | } else { |
screamer | 0:7a64fbb4069d | 401 | if (TCP_SEQ_GT(pcb->rcv_nxt, pcb->rcv_ann_right_edge)) { |
screamer | 0:7a64fbb4069d | 402 | /* Can happen due to other end sending out of advertised window, |
screamer | 0:7a64fbb4069d | 403 | * but within actual available (but not yet advertised) window */ |
screamer | 0:7a64fbb4069d | 404 | pcb->rcv_ann_wnd = 0; |
screamer | 0:7a64fbb4069d | 405 | } else { |
screamer | 0:7a64fbb4069d | 406 | /* keep the right edge of window constant */ |
screamer | 0:7a64fbb4069d | 407 | pcb->rcv_ann_wnd = pcb->rcv_ann_right_edge - pcb->rcv_nxt; |
screamer | 0:7a64fbb4069d | 408 | } |
screamer | 0:7a64fbb4069d | 409 | return 0; |
screamer | 0:7a64fbb4069d | 410 | } |
screamer | 0:7a64fbb4069d | 411 | } |
screamer | 0:7a64fbb4069d | 412 | |
screamer | 0:7a64fbb4069d | 413 | /** |
screamer | 0:7a64fbb4069d | 414 | * This function should be called by the application when it has |
screamer | 0:7a64fbb4069d | 415 | * processed the data. The purpose is to advertise a larger window |
screamer | 0:7a64fbb4069d | 416 | * when the data has been processed. |
screamer | 0:7a64fbb4069d | 417 | * |
screamer | 0:7a64fbb4069d | 418 | * @param pcb the tcp_pcb for which data is read |
screamer | 0:7a64fbb4069d | 419 | * @param len the amount of bytes that have been read by the application |
screamer | 0:7a64fbb4069d | 420 | */ |
screamer | 0:7a64fbb4069d | 421 | void |
screamer | 0:7a64fbb4069d | 422 | tcp_recved(struct tcp_pcb *pcb, u16_t len) |
screamer | 0:7a64fbb4069d | 423 | { |
screamer | 0:7a64fbb4069d | 424 | int wnd_inflation; |
screamer | 0:7a64fbb4069d | 425 | |
screamer | 0:7a64fbb4069d | 426 | pcb->rcv_wnd += len; |
screamer | 0:7a64fbb4069d | 427 | if (pcb->rcv_wnd > TCP_WND) |
screamer | 0:7a64fbb4069d | 428 | pcb->rcv_wnd = TCP_WND; |
screamer | 0:7a64fbb4069d | 429 | |
screamer | 0:7a64fbb4069d | 430 | wnd_inflation = tcp_update_rcv_ann_wnd(pcb); |
screamer | 0:7a64fbb4069d | 431 | |
screamer | 0:7a64fbb4069d | 432 | /* If the change in the right edge of window is significant (default |
screamer | 0:7a64fbb4069d | 433 | * watermark is TCP_WND/2), then send an explicit update now. |
screamer | 0:7a64fbb4069d | 434 | * Otherwise wait for a packet to be sent in the normal course of |
screamer | 0:7a64fbb4069d | 435 | * events (or more window to be available later) */ |
screamer | 0:7a64fbb4069d | 436 | if (wnd_inflation >= TCP_WND_UPDATE_THRESHOLD) |
screamer | 0:7a64fbb4069d | 437 | tcp_ack_now(pcb); |
screamer | 0:7a64fbb4069d | 438 | |
screamer | 0:7a64fbb4069d | 439 | LWIP_DEBUGF(TCP_DEBUG, ("tcp_recved: recveived %"U16_F" bytes, wnd %"U16_F" (%"U16_F").\n", |
screamer | 0:7a64fbb4069d | 440 | len, pcb->rcv_wnd, TCP_WND - pcb->rcv_wnd)); |
screamer | 0:7a64fbb4069d | 441 | } |
screamer | 0:7a64fbb4069d | 442 | |
screamer | 0:7a64fbb4069d | 443 | /** |
screamer | 0:7a64fbb4069d | 444 | * A nastly hack featuring 'goto' statements that allocates a |
screamer | 0:7a64fbb4069d | 445 | * new TCP local port. |
screamer | 0:7a64fbb4069d | 446 | * |
screamer | 0:7a64fbb4069d | 447 | * @return a new (free) local TCP port number |
screamer | 0:7a64fbb4069d | 448 | */ |
screamer | 0:7a64fbb4069d | 449 | static u16_t |
screamer | 0:7a64fbb4069d | 450 | tcp_new_port(void) |
screamer | 0:7a64fbb4069d | 451 | { |
screamer | 0:7a64fbb4069d | 452 | struct tcp_pcb *pcb; |
screamer | 0:7a64fbb4069d | 453 | #ifndef TCP_LOCAL_PORT_RANGE_START |
screamer | 0:7a64fbb4069d | 454 | #define TCP_LOCAL_PORT_RANGE_START 4096 |
screamer | 0:7a64fbb4069d | 455 | #define TCP_LOCAL_PORT_RANGE_END 0x7fff |
screamer | 0:7a64fbb4069d | 456 | #endif |
screamer | 0:7a64fbb4069d | 457 | static u16_t port = TCP_LOCAL_PORT_RANGE_START; |
screamer | 0:7a64fbb4069d | 458 | |
screamer | 0:7a64fbb4069d | 459 | again: |
screamer | 0:7a64fbb4069d | 460 | if (++port > TCP_LOCAL_PORT_RANGE_END) { |
screamer | 0:7a64fbb4069d | 461 | port = TCP_LOCAL_PORT_RANGE_START; |
screamer | 0:7a64fbb4069d | 462 | } |
screamer | 0:7a64fbb4069d | 463 | |
screamer | 0:7a64fbb4069d | 464 | for(pcb = tcp_active_pcbs; pcb != NULL; pcb = pcb->next) { |
screamer | 0:7a64fbb4069d | 465 | if (pcb->local_port == port) { |
screamer | 0:7a64fbb4069d | 466 | goto again; |
screamer | 0:7a64fbb4069d | 467 | } |
screamer | 0:7a64fbb4069d | 468 | } |
screamer | 0:7a64fbb4069d | 469 | for(pcb = tcp_tw_pcbs; pcb != NULL; pcb = pcb->next) { |
screamer | 0:7a64fbb4069d | 470 | if (pcb->local_port == port) { |
screamer | 0:7a64fbb4069d | 471 | goto again; |
screamer | 0:7a64fbb4069d | 472 | } |
screamer | 0:7a64fbb4069d | 473 | } |
screamer | 0:7a64fbb4069d | 474 | for(pcb = (struct tcp_pcb *)tcp_listen_pcbs.pcbs; pcb != NULL; pcb = pcb->next) { |
screamer | 0:7a64fbb4069d | 475 | if (pcb->local_port == port) { |
screamer | 0:7a64fbb4069d | 476 | goto again; |
screamer | 0:7a64fbb4069d | 477 | } |
screamer | 0:7a64fbb4069d | 478 | } |
screamer | 0:7a64fbb4069d | 479 | return port; |
screamer | 0:7a64fbb4069d | 480 | } |
screamer | 0:7a64fbb4069d | 481 | |
screamer | 0:7a64fbb4069d | 482 | /** |
screamer | 0:7a64fbb4069d | 483 | * Connects to another host. The function given as the "connected" |
screamer | 0:7a64fbb4069d | 484 | * argument will be called when the connection has been established. |
screamer | 0:7a64fbb4069d | 485 | * |
screamer | 0:7a64fbb4069d | 486 | * @param pcb the tcp_pcb used to establish the connection |
screamer | 0:7a64fbb4069d | 487 | * @param ipaddr the remote ip address to connect to |
screamer | 0:7a64fbb4069d | 488 | * @param port the remote tcp port to connect to |
screamer | 0:7a64fbb4069d | 489 | * @param connected callback function to call when connected (or on error) |
screamer | 0:7a64fbb4069d | 490 | * @return ERR_VAL if invalid arguments are given |
screamer | 0:7a64fbb4069d | 491 | * ERR_OK if connect request has been sent |
screamer | 0:7a64fbb4069d | 492 | * other err_t values if connect request couldn't be sent |
screamer | 0:7a64fbb4069d | 493 | */ |
screamer | 0:7a64fbb4069d | 494 | err_t |
screamer | 0:7a64fbb4069d | 495 | tcp_connect(struct tcp_pcb *pcb, struct ip_addr *ipaddr, u16_t port, |
screamer | 0:7a64fbb4069d | 496 | err_t (* connected)(void *arg, struct tcp_pcb *tpcb, err_t err)) |
screamer | 0:7a64fbb4069d | 497 | { |
screamer | 0:7a64fbb4069d | 498 | err_t ret; |
screamer | 0:7a64fbb4069d | 499 | u32_t iss; |
screamer | 0:7a64fbb4069d | 500 | |
screamer | 0:7a64fbb4069d | 501 | LWIP_ERROR("tcp_connect: can only connected from state CLOSED", pcb->state == CLOSED, return ERR_ISCONN); |
screamer | 0:7a64fbb4069d | 502 | |
screamer | 0:7a64fbb4069d | 503 | LWIP_DEBUGF(TCP_DEBUG, ("tcp_connect to port %"U16_F"\n", port)); |
screamer | 0:7a64fbb4069d | 504 | if (ipaddr != NULL) { |
screamer | 0:7a64fbb4069d | 505 | pcb->remote_ip = *ipaddr; |
screamer | 0:7a64fbb4069d | 506 | } else { |
screamer | 0:7a64fbb4069d | 507 | return ERR_VAL; |
screamer | 0:7a64fbb4069d | 508 | } |
screamer | 0:7a64fbb4069d | 509 | pcb->remote_port = port; |
screamer | 0:7a64fbb4069d | 510 | if (pcb->local_port == 0) { |
screamer | 0:7a64fbb4069d | 511 | pcb->local_port = tcp_new_port(); |
screamer | 0:7a64fbb4069d | 512 | } |
screamer | 0:7a64fbb4069d | 513 | iss = tcp_next_iss(); |
screamer | 0:7a64fbb4069d | 514 | pcb->rcv_nxt = 0; |
screamer | 0:7a64fbb4069d | 515 | pcb->snd_nxt = iss; |
screamer | 0:7a64fbb4069d | 516 | pcb->lastack = iss - 1; |
screamer | 0:7a64fbb4069d | 517 | pcb->snd_lbb = iss - 1; |
screamer | 0:7a64fbb4069d | 518 | pcb->rcv_wnd = TCP_WND; |
screamer | 0:7a64fbb4069d | 519 | pcb->rcv_ann_wnd = TCP_WND; |
screamer | 0:7a64fbb4069d | 520 | pcb->rcv_ann_right_edge = pcb->rcv_nxt; |
screamer | 0:7a64fbb4069d | 521 | pcb->snd_wnd = TCP_WND; |
screamer | 0:7a64fbb4069d | 522 | /* As initial send MSS, we use TCP_MSS but limit it to 536. |
screamer | 0:7a64fbb4069d | 523 | The send MSS is updated when an MSS option is received. */ |
screamer | 0:7a64fbb4069d | 524 | pcb->mss = (TCP_MSS > 536) ? 536 : TCP_MSS; |
screamer | 0:7a64fbb4069d | 525 | #if TCP_CALCULATE_EFF_SEND_MSS |
screamer | 0:7a64fbb4069d | 526 | pcb->mss = tcp_eff_send_mss(pcb->mss, ipaddr); |
screamer | 0:7a64fbb4069d | 527 | #endif /* TCP_CALCULATE_EFF_SEND_MSS */ |
screamer | 0:7a64fbb4069d | 528 | pcb->cwnd = 1; |
screamer | 0:7a64fbb4069d | 529 | pcb->ssthresh = pcb->mss * 10; |
screamer | 0:7a64fbb4069d | 530 | pcb->state = SYN_SENT; |
screamer | 0:7a64fbb4069d | 531 | #if LWIP_CALLBACK_API |
screamer | 0:7a64fbb4069d | 532 | pcb->connected = connected; |
screamer | 0:7a64fbb4069d | 533 | #endif /* LWIP_CALLBACK_API */ |
screamer | 0:7a64fbb4069d | 534 | TCP_RMV(&tcp_bound_pcbs, pcb); |
screamer | 0:7a64fbb4069d | 535 | TCP_REG(&tcp_active_pcbs, pcb); |
screamer | 0:7a64fbb4069d | 536 | |
screamer | 0:7a64fbb4069d | 537 | snmp_inc_tcpactiveopens(); |
screamer | 0:7a64fbb4069d | 538 | |
screamer | 0:7a64fbb4069d | 539 | ret = tcp_enqueue(pcb, NULL, 0, TCP_SYN, 0, TF_SEG_OPTS_MSS |
screamer | 0:7a64fbb4069d | 540 | #if LWIP_TCP_TIMESTAMPS |
screamer | 0:7a64fbb4069d | 541 | | TF_SEG_OPTS_TS |
screamer | 0:7a64fbb4069d | 542 | #endif |
screamer | 0:7a64fbb4069d | 543 | ); |
screamer | 0:7a64fbb4069d | 544 | if (ret == ERR_OK) { |
screamer | 0:7a64fbb4069d | 545 | tcp_output(pcb); |
screamer | 0:7a64fbb4069d | 546 | } |
screamer | 0:7a64fbb4069d | 547 | return ret; |
screamer | 0:7a64fbb4069d | 548 | } |
screamer | 0:7a64fbb4069d | 549 | |
screamer | 0:7a64fbb4069d | 550 | /** |
screamer | 0:7a64fbb4069d | 551 | * Called every 500 ms and implements the retransmission timer and the timer that |
screamer | 0:7a64fbb4069d | 552 | * removes PCBs that have been in TIME-WAIT for enough time. It also increments |
screamer | 0:7a64fbb4069d | 553 | * various timers such as the inactivity timer in each PCB. |
screamer | 0:7a64fbb4069d | 554 | * |
screamer | 0:7a64fbb4069d | 555 | * Automatically called from tcp_tmr(). |
screamer | 0:7a64fbb4069d | 556 | */ |
screamer | 0:7a64fbb4069d | 557 | void |
screamer | 0:7a64fbb4069d | 558 | tcp_slowtmr(void) |
screamer | 0:7a64fbb4069d | 559 | { |
screamer | 0:7a64fbb4069d | 560 | struct tcp_pcb *pcb, *pcb2, *prev; |
screamer | 0:7a64fbb4069d | 561 | u16_t eff_wnd; |
screamer | 0:7a64fbb4069d | 562 | u8_t pcb_remove; /* flag if a PCB should be removed */ |
screamer | 0:7a64fbb4069d | 563 | err_t err; |
screamer | 0:7a64fbb4069d | 564 | |
screamer | 0:7a64fbb4069d | 565 | err = ERR_OK; |
screamer | 0:7a64fbb4069d | 566 | |
screamer | 0:7a64fbb4069d | 567 | ++tcp_ticks; |
screamer | 0:7a64fbb4069d | 568 | |
screamer | 0:7a64fbb4069d | 569 | /* Steps through all of the active PCBs. */ |
screamer | 0:7a64fbb4069d | 570 | prev = NULL; |
screamer | 0:7a64fbb4069d | 571 | pcb = tcp_active_pcbs; |
screamer | 0:7a64fbb4069d | 572 | if (pcb == NULL) { |
screamer | 0:7a64fbb4069d | 573 | LWIP_DEBUGF(TCP_DEBUG, ("tcp_slowtmr: no active pcbs\n")); |
screamer | 0:7a64fbb4069d | 574 | } |
screamer | 0:7a64fbb4069d | 575 | while (pcb != NULL) { |
screamer | 0:7a64fbb4069d | 576 | LWIP_DEBUGF(TCP_DEBUG, ("tcp_slowtmr: processing active pcb\n")); |
screamer | 0:7a64fbb4069d | 577 | LWIP_ASSERT("tcp_slowtmr: active pcb->state != CLOSED\n", pcb->state != CLOSED); |
screamer | 0:7a64fbb4069d | 578 | LWIP_ASSERT("tcp_slowtmr: active pcb->state != LISTEN\n", pcb->state != LISTEN); |
screamer | 0:7a64fbb4069d | 579 | LWIP_ASSERT("tcp_slowtmr: active pcb->state != TIME-WAIT\n", pcb->state != TIME_WAIT); |
screamer | 0:7a64fbb4069d | 580 | |
screamer | 0:7a64fbb4069d | 581 | pcb_remove = 0; |
screamer | 0:7a64fbb4069d | 582 | |
screamer | 0:7a64fbb4069d | 583 | if (pcb->state == SYN_SENT && pcb->nrtx == TCP_SYNMAXRTX) { |
screamer | 0:7a64fbb4069d | 584 | ++pcb_remove; |
screamer | 0:7a64fbb4069d | 585 | LWIP_DEBUGF(TCP_DEBUG, ("tcp_slowtmr: max SYN retries reached\n")); |
screamer | 0:7a64fbb4069d | 586 | } |
screamer | 0:7a64fbb4069d | 587 | else if (pcb->nrtx == TCP_MAXRTX) { |
screamer | 0:7a64fbb4069d | 588 | ++pcb_remove; |
screamer | 0:7a64fbb4069d | 589 | LWIP_DEBUGF(TCP_DEBUG, ("tcp_slowtmr: max DATA retries reached\n")); |
screamer | 0:7a64fbb4069d | 590 | } else { |
screamer | 0:7a64fbb4069d | 591 | if (pcb->persist_backoff > 0) { |
screamer | 0:7a64fbb4069d | 592 | /* If snd_wnd is zero, use persist timer to send 1 byte probes |
screamer | 0:7a64fbb4069d | 593 | * instead of using the standard retransmission mechanism. */ |
screamer | 0:7a64fbb4069d | 594 | pcb->persist_cnt++; |
screamer | 0:7a64fbb4069d | 595 | if (pcb->persist_cnt >= tcp_persist_backoff[pcb->persist_backoff-1]) { |
screamer | 0:7a64fbb4069d | 596 | pcb->persist_cnt = 0; |
screamer | 0:7a64fbb4069d | 597 | if (pcb->persist_backoff < sizeof(tcp_persist_backoff)) { |
screamer | 0:7a64fbb4069d | 598 | pcb->persist_backoff++; |
screamer | 0:7a64fbb4069d | 599 | } |
screamer | 0:7a64fbb4069d | 600 | tcp_zero_window_probe(pcb); |
screamer | 0:7a64fbb4069d | 601 | } |
screamer | 0:7a64fbb4069d | 602 | } else { |
screamer | 0:7a64fbb4069d | 603 | /* Increase the retransmission timer if it is running */ |
screamer | 0:7a64fbb4069d | 604 | if(pcb->rtime >= 0) |
screamer | 0:7a64fbb4069d | 605 | ++pcb->rtime; |
screamer | 0:7a64fbb4069d | 606 | |
screamer | 0:7a64fbb4069d | 607 | if (pcb->unacked != NULL && pcb->rtime >= pcb->rto) { |
screamer | 0:7a64fbb4069d | 608 | /* Time for a retransmission. */ |
screamer | 0:7a64fbb4069d | 609 | LWIP_DEBUGF(TCP_RTO_DEBUG, ("tcp_slowtmr: rtime %"S16_F |
screamer | 0:7a64fbb4069d | 610 | " pcb->rto %"S16_F"\n", |
screamer | 0:7a64fbb4069d | 611 | pcb->rtime, pcb->rto)); |
screamer | 0:7a64fbb4069d | 612 | |
screamer | 0:7a64fbb4069d | 613 | /* Double retransmission time-out unless we are trying to |
screamer | 0:7a64fbb4069d | 614 | * connect to somebody (i.e., we are in SYN_SENT). */ |
screamer | 0:7a64fbb4069d | 615 | if (pcb->state != SYN_SENT) { |
screamer | 0:7a64fbb4069d | 616 | pcb->rto = ((pcb->sa >> 3) + pcb->sv) << tcp_backoff[pcb->nrtx]; |
screamer | 0:7a64fbb4069d | 617 | } |
screamer | 0:7a64fbb4069d | 618 | |
screamer | 0:7a64fbb4069d | 619 | /* Reset the retransmission timer. */ |
screamer | 0:7a64fbb4069d | 620 | pcb->rtime = 0; |
screamer | 0:7a64fbb4069d | 621 | |
screamer | 0:7a64fbb4069d | 622 | /* Reduce congestion window and ssthresh. */ |
screamer | 0:7a64fbb4069d | 623 | eff_wnd = LWIP_MIN(pcb->cwnd, pcb->snd_wnd); |
screamer | 0:7a64fbb4069d | 624 | pcb->ssthresh = eff_wnd >> 1; |
screamer | 0:7a64fbb4069d | 625 | if (pcb->ssthresh < pcb->mss) { |
screamer | 0:7a64fbb4069d | 626 | pcb->ssthresh = pcb->mss * 2; |
screamer | 0:7a64fbb4069d | 627 | } |
screamer | 0:7a64fbb4069d | 628 | pcb->cwnd = pcb->mss; |
screamer | 0:7a64fbb4069d | 629 | LWIP_DEBUGF(TCP_CWND_DEBUG, ("tcp_slowtmr: cwnd %"U16_F |
screamer | 0:7a64fbb4069d | 630 | " ssthresh %"U16_F"\n", |
screamer | 0:7a64fbb4069d | 631 | pcb->cwnd, pcb->ssthresh)); |
screamer | 0:7a64fbb4069d | 632 | |
screamer | 0:7a64fbb4069d | 633 | /* The following needs to be called AFTER cwnd is set to one |
screamer | 0:7a64fbb4069d | 634 | mss - STJ */ |
screamer | 0:7a64fbb4069d | 635 | tcp_rexmit_rto(pcb); |
screamer | 0:7a64fbb4069d | 636 | } |
screamer | 0:7a64fbb4069d | 637 | } |
screamer | 0:7a64fbb4069d | 638 | } |
screamer | 0:7a64fbb4069d | 639 | /* Check if this PCB has stayed too long in FIN-WAIT-2 */ |
screamer | 0:7a64fbb4069d | 640 | if (pcb->state == FIN_WAIT_2) { |
screamer | 0:7a64fbb4069d | 641 | if ((u32_t)(tcp_ticks - pcb->tmr) > |
screamer | 0:7a64fbb4069d | 642 | TCP_FIN_WAIT_TIMEOUT / TCP_SLOW_INTERVAL) { |
screamer | 0:7a64fbb4069d | 643 | ++pcb_remove; |
screamer | 0:7a64fbb4069d | 644 | LWIP_DEBUGF(TCP_DEBUG, ("tcp_slowtmr: removing pcb stuck in FIN-WAIT-2\n")); |
screamer | 0:7a64fbb4069d | 645 | } |
screamer | 0:7a64fbb4069d | 646 | } |
screamer | 0:7a64fbb4069d | 647 | |
screamer | 0:7a64fbb4069d | 648 | /* Check if KEEPALIVE should be sent */ |
screamer | 0:7a64fbb4069d | 649 | if((pcb->so_options & SOF_KEEPALIVE) && |
screamer | 0:7a64fbb4069d | 650 | ((pcb->state == ESTABLISHED) || |
screamer | 0:7a64fbb4069d | 651 | (pcb->state == CLOSE_WAIT))) { |
screamer | 0:7a64fbb4069d | 652 | #if LWIP_TCP_KEEPALIVE |
screamer | 0:7a64fbb4069d | 653 | if((u32_t)(tcp_ticks - pcb->tmr) > |
screamer | 0:7a64fbb4069d | 654 | (pcb->keep_idle + (pcb->keep_cnt*pcb->keep_intvl)) |
screamer | 0:7a64fbb4069d | 655 | / TCP_SLOW_INTERVAL) |
screamer | 0:7a64fbb4069d | 656 | #else |
screamer | 0:7a64fbb4069d | 657 | if((u32_t)(tcp_ticks - pcb->tmr) > |
screamer | 0:7a64fbb4069d | 658 | (pcb->keep_idle + TCP_MAXIDLE) / TCP_SLOW_INTERVAL) |
screamer | 0:7a64fbb4069d | 659 | #endif /* LWIP_TCP_KEEPALIVE */ |
screamer | 0:7a64fbb4069d | 660 | { |
screamer | 0:7a64fbb4069d | 661 | LWIP_DEBUGF(TCP_DEBUG, ("tcp_slowtmr: KEEPALIVE timeout. Aborting connection to %"U16_F".%"U16_F".%"U16_F".%"U16_F".\n", |
screamer | 0:7a64fbb4069d | 662 | ip4_addr1(&pcb->remote_ip), ip4_addr2(&pcb->remote_ip), |
screamer | 0:7a64fbb4069d | 663 | ip4_addr3(&pcb->remote_ip), ip4_addr4(&pcb->remote_ip))); |
screamer | 0:7a64fbb4069d | 664 | |
screamer | 0:7a64fbb4069d | 665 | tcp_abort(pcb); |
screamer | 0:7a64fbb4069d | 666 | } |
screamer | 0:7a64fbb4069d | 667 | #if LWIP_TCP_KEEPALIVE |
screamer | 0:7a64fbb4069d | 668 | else if((u32_t)(tcp_ticks - pcb->tmr) > |
screamer | 0:7a64fbb4069d | 669 | (pcb->keep_idle + pcb->keep_cnt_sent * pcb->keep_intvl) |
screamer | 0:7a64fbb4069d | 670 | / TCP_SLOW_INTERVAL) |
screamer | 0:7a64fbb4069d | 671 | #else |
screamer | 0:7a64fbb4069d | 672 | else if((u32_t)(tcp_ticks - pcb->tmr) > |
screamer | 0:7a64fbb4069d | 673 | (pcb->keep_idle + pcb->keep_cnt_sent * TCP_KEEPINTVL_DEFAULT) |
screamer | 0:7a64fbb4069d | 674 | / TCP_SLOW_INTERVAL) |
screamer | 0:7a64fbb4069d | 675 | #endif /* LWIP_TCP_KEEPALIVE */ |
screamer | 0:7a64fbb4069d | 676 | { |
screamer | 0:7a64fbb4069d | 677 | tcp_keepalive(pcb); |
screamer | 0:7a64fbb4069d | 678 | pcb->keep_cnt_sent++; |
screamer | 0:7a64fbb4069d | 679 | } |
screamer | 0:7a64fbb4069d | 680 | } |
screamer | 0:7a64fbb4069d | 681 | |
screamer | 0:7a64fbb4069d | 682 | /* If this PCB has queued out of sequence data, but has been |
screamer | 0:7a64fbb4069d | 683 | inactive for too long, will drop the data (it will eventually |
screamer | 0:7a64fbb4069d | 684 | be retransmitted). */ |
screamer | 0:7a64fbb4069d | 685 | #if TCP_QUEUE_OOSEQ |
screamer | 0:7a64fbb4069d | 686 | if (pcb->ooseq != NULL && |
screamer | 0:7a64fbb4069d | 687 | (u32_t)tcp_ticks - pcb->tmr >= pcb->rto * TCP_OOSEQ_TIMEOUT) { |
screamer | 0:7a64fbb4069d | 688 | tcp_segs_free(pcb->ooseq); |
screamer | 0:7a64fbb4069d | 689 | pcb->ooseq = NULL; |
screamer | 0:7a64fbb4069d | 690 | LWIP_DEBUGF(TCP_CWND_DEBUG, ("tcp_slowtmr: dropping OOSEQ queued data\n")); |
screamer | 0:7a64fbb4069d | 691 | } |
screamer | 0:7a64fbb4069d | 692 | #endif /* TCP_QUEUE_OOSEQ */ |
screamer | 0:7a64fbb4069d | 693 | |
screamer | 0:7a64fbb4069d | 694 | /* Check if this PCB has stayed too long in SYN-RCVD */ |
screamer | 0:7a64fbb4069d | 695 | if (pcb->state == SYN_RCVD) { |
screamer | 0:7a64fbb4069d | 696 | if ((u32_t)(tcp_ticks - pcb->tmr) > |
screamer | 0:7a64fbb4069d | 697 | TCP_SYN_RCVD_TIMEOUT / TCP_SLOW_INTERVAL) { |
screamer | 0:7a64fbb4069d | 698 | ++pcb_remove; |
screamer | 0:7a64fbb4069d | 699 | LWIP_DEBUGF(TCP_DEBUG, ("tcp_slowtmr: removing pcb stuck in SYN-RCVD\n")); |
screamer | 0:7a64fbb4069d | 700 | } |
screamer | 0:7a64fbb4069d | 701 | } |
screamer | 0:7a64fbb4069d | 702 | |
screamer | 0:7a64fbb4069d | 703 | /* Check if this PCB has stayed too long in LAST-ACK */ |
screamer | 0:7a64fbb4069d | 704 | if (pcb->state == LAST_ACK) { |
screamer | 0:7a64fbb4069d | 705 | if ((u32_t)(tcp_ticks - pcb->tmr) > 2 * TCP_MSL / TCP_SLOW_INTERVAL) { |
screamer | 0:7a64fbb4069d | 706 | ++pcb_remove; |
screamer | 0:7a64fbb4069d | 707 | LWIP_DEBUGF(TCP_DEBUG, ("tcp_slowtmr: removing pcb stuck in LAST-ACK\n")); |
screamer | 0:7a64fbb4069d | 708 | } |
screamer | 0:7a64fbb4069d | 709 | } |
screamer | 0:7a64fbb4069d | 710 | |
screamer | 0:7a64fbb4069d | 711 | /* If the PCB should be removed, do it. */ |
screamer | 0:7a64fbb4069d | 712 | if (pcb_remove) { |
screamer | 0:7a64fbb4069d | 713 | tcp_pcb_purge(pcb); |
screamer | 0:7a64fbb4069d | 714 | /* Remove PCB from tcp_active_pcbs list. */ |
screamer | 0:7a64fbb4069d | 715 | if (prev != NULL) { |
screamer | 0:7a64fbb4069d | 716 | LWIP_ASSERT("tcp_slowtmr: middle tcp != tcp_active_pcbs", pcb != tcp_active_pcbs); |
screamer | 0:7a64fbb4069d | 717 | prev->next = pcb->next; |
screamer | 0:7a64fbb4069d | 718 | } else { |
screamer | 0:7a64fbb4069d | 719 | /* This PCB was the first. */ |
screamer | 0:7a64fbb4069d | 720 | LWIP_ASSERT("tcp_slowtmr: first pcb == tcp_active_pcbs", tcp_active_pcbs == pcb); |
screamer | 0:7a64fbb4069d | 721 | tcp_active_pcbs = pcb->next; |
screamer | 0:7a64fbb4069d | 722 | } |
screamer | 0:7a64fbb4069d | 723 | |
screamer | 0:7a64fbb4069d | 724 | TCP_EVENT_ERR(pcb->errf, pcb->callback_arg, ERR_ABRT); |
screamer | 0:7a64fbb4069d | 725 | |
screamer | 0:7a64fbb4069d | 726 | pcb2 = pcb->next; |
screamer | 0:7a64fbb4069d | 727 | memp_free(MEMP_TCP_PCB, pcb); |
screamer | 0:7a64fbb4069d | 728 | pcb = pcb2; |
screamer | 0:7a64fbb4069d | 729 | } else { |
screamer | 0:7a64fbb4069d | 730 | |
screamer | 0:7a64fbb4069d | 731 | /* We check if we should poll the connection. */ |
screamer | 0:7a64fbb4069d | 732 | ++pcb->polltmr; |
screamer | 0:7a64fbb4069d | 733 | if (pcb->polltmr >= pcb->pollinterval) { |
screamer | 0:7a64fbb4069d | 734 | pcb->polltmr = 0; |
screamer | 0:7a64fbb4069d | 735 | LWIP_DEBUGF(TCP_DEBUG, ("tcp_slowtmr: polling application\n")); |
screamer | 0:7a64fbb4069d | 736 | TCP_EVENT_POLL(pcb, err); |
screamer | 0:7a64fbb4069d | 737 | if (err == ERR_OK) { |
screamer | 0:7a64fbb4069d | 738 | tcp_output(pcb); |
screamer | 0:7a64fbb4069d | 739 | } |
screamer | 0:7a64fbb4069d | 740 | } |
screamer | 0:7a64fbb4069d | 741 | |
screamer | 0:7a64fbb4069d | 742 | prev = pcb; |
screamer | 0:7a64fbb4069d | 743 | pcb = pcb->next; |
screamer | 0:7a64fbb4069d | 744 | } |
screamer | 0:7a64fbb4069d | 745 | } |
screamer | 0:7a64fbb4069d | 746 | |
screamer | 0:7a64fbb4069d | 747 | |
screamer | 0:7a64fbb4069d | 748 | /* Steps through all of the TIME-WAIT PCBs. */ |
screamer | 0:7a64fbb4069d | 749 | prev = NULL; |
screamer | 0:7a64fbb4069d | 750 | pcb = tcp_tw_pcbs; |
screamer | 0:7a64fbb4069d | 751 | while (pcb != NULL) { |
screamer | 0:7a64fbb4069d | 752 | LWIP_ASSERT("tcp_slowtmr: TIME-WAIT pcb->state == TIME-WAIT", pcb->state == TIME_WAIT); |
screamer | 0:7a64fbb4069d | 753 | pcb_remove = 0; |
screamer | 0:7a64fbb4069d | 754 | |
screamer | 0:7a64fbb4069d | 755 | /* Check if this PCB has stayed long enough in TIME-WAIT */ |
screamer | 0:7a64fbb4069d | 756 | if ((u32_t)(tcp_ticks - pcb->tmr) > 2 * TCP_MSL / TCP_SLOW_INTERVAL) { |
screamer | 0:7a64fbb4069d | 757 | ++pcb_remove; |
screamer | 0:7a64fbb4069d | 758 | } |
screamer | 0:7a64fbb4069d | 759 | |
screamer | 0:7a64fbb4069d | 760 | |
screamer | 0:7a64fbb4069d | 761 | |
screamer | 0:7a64fbb4069d | 762 | /* If the PCB should be removed, do it. */ |
screamer | 0:7a64fbb4069d | 763 | if (pcb_remove) { |
screamer | 0:7a64fbb4069d | 764 | tcp_pcb_purge(pcb); |
screamer | 0:7a64fbb4069d | 765 | /* Remove PCB from tcp_tw_pcbs list. */ |
screamer | 0:7a64fbb4069d | 766 | if (prev != NULL) { |
screamer | 0:7a64fbb4069d | 767 | LWIP_ASSERT("tcp_slowtmr: middle tcp != tcp_tw_pcbs", pcb != tcp_tw_pcbs); |
screamer | 0:7a64fbb4069d | 768 | prev->next = pcb->next; |
screamer | 0:7a64fbb4069d | 769 | } else { |
screamer | 0:7a64fbb4069d | 770 | /* This PCB was the first. */ |
screamer | 0:7a64fbb4069d | 771 | LWIP_ASSERT("tcp_slowtmr: first pcb == tcp_tw_pcbs", tcp_tw_pcbs == pcb); |
screamer | 0:7a64fbb4069d | 772 | tcp_tw_pcbs = pcb->next; |
screamer | 0:7a64fbb4069d | 773 | } |
screamer | 0:7a64fbb4069d | 774 | pcb2 = pcb->next; |
screamer | 0:7a64fbb4069d | 775 | memp_free(MEMP_TCP_PCB, pcb); |
screamer | 0:7a64fbb4069d | 776 | pcb = pcb2; |
screamer | 0:7a64fbb4069d | 777 | } else { |
screamer | 0:7a64fbb4069d | 778 | prev = pcb; |
screamer | 0:7a64fbb4069d | 779 | pcb = pcb->next; |
screamer | 0:7a64fbb4069d | 780 | } |
screamer | 0:7a64fbb4069d | 781 | } |
screamer | 0:7a64fbb4069d | 782 | } |
screamer | 0:7a64fbb4069d | 783 | |
screamer | 0:7a64fbb4069d | 784 | /** |
screamer | 0:7a64fbb4069d | 785 | * Is called every TCP_FAST_INTERVAL (250 ms) and process data previously |
screamer | 0:7a64fbb4069d | 786 | * "refused" by upper layer (application) and sends delayed ACKs. |
screamer | 0:7a64fbb4069d | 787 | * |
screamer | 0:7a64fbb4069d | 788 | * Automatically called from tcp_tmr(). |
screamer | 0:7a64fbb4069d | 789 | */ |
screamer | 0:7a64fbb4069d | 790 | void |
screamer | 0:7a64fbb4069d | 791 | tcp_fasttmr(void) |
screamer | 0:7a64fbb4069d | 792 | { |
screamer | 0:7a64fbb4069d | 793 | struct tcp_pcb *pcb; |
screamer | 0:7a64fbb4069d | 794 | |
screamer | 0:7a64fbb4069d | 795 | for(pcb = tcp_active_pcbs; pcb != NULL; pcb = pcb->next) { |
screamer | 0:7a64fbb4069d | 796 | /* If there is data which was previously "refused" by upper layer */ |
screamer | 0:7a64fbb4069d | 797 | if (pcb->refused_data != NULL) { |
screamer | 0:7a64fbb4069d | 798 | /* Notify again application with data previously received. */ |
screamer | 0:7a64fbb4069d | 799 | err_t err; |
screamer | 0:7a64fbb4069d | 800 | LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_fasttmr: notify kept packet\n")); |
screamer | 0:7a64fbb4069d | 801 | TCP_EVENT_RECV(pcb, pcb->refused_data, ERR_OK, err); |
screamer | 0:7a64fbb4069d | 802 | if (err == ERR_OK) { |
screamer | 0:7a64fbb4069d | 803 | pcb->refused_data = NULL; |
screamer | 0:7a64fbb4069d | 804 | } |
screamer | 0:7a64fbb4069d | 805 | } |
screamer | 0:7a64fbb4069d | 806 | |
screamer | 0:7a64fbb4069d | 807 | /* send delayed ACKs */ |
screamer | 0:7a64fbb4069d | 808 | if (pcb->flags & TF_ACK_DELAY) { |
screamer | 0:7a64fbb4069d | 809 | LWIP_DEBUGF(TCP_DEBUG, ("tcp_fasttmr: delayed ACK\n")); |
screamer | 0:7a64fbb4069d | 810 | tcp_ack_now(pcb); |
screamer | 0:7a64fbb4069d | 811 | pcb->flags &= ~(TF_ACK_DELAY | TF_ACK_NOW); |
screamer | 0:7a64fbb4069d | 812 | } |
screamer | 0:7a64fbb4069d | 813 | } |
screamer | 0:7a64fbb4069d | 814 | } |
screamer | 0:7a64fbb4069d | 815 | |
screamer | 0:7a64fbb4069d | 816 | /** |
screamer | 0:7a64fbb4069d | 817 | * Deallocates a list of TCP segments (tcp_seg structures). |
screamer | 0:7a64fbb4069d | 818 | * |
screamer | 0:7a64fbb4069d | 819 | * @param seg tcp_seg list of TCP segments to free |
screamer | 0:7a64fbb4069d | 820 | * @return the number of pbufs that were deallocated |
screamer | 0:7a64fbb4069d | 821 | */ |
screamer | 0:7a64fbb4069d | 822 | u8_t |
screamer | 0:7a64fbb4069d | 823 | tcp_segs_free(struct tcp_seg *seg) |
screamer | 0:7a64fbb4069d | 824 | { |
screamer | 0:7a64fbb4069d | 825 | u8_t count = 0; |
screamer | 0:7a64fbb4069d | 826 | struct tcp_seg *next; |
screamer | 0:7a64fbb4069d | 827 | while (seg != NULL) { |
screamer | 0:7a64fbb4069d | 828 | next = seg->next; |
screamer | 0:7a64fbb4069d | 829 | count += tcp_seg_free(seg); |
screamer | 0:7a64fbb4069d | 830 | seg = next; |
screamer | 0:7a64fbb4069d | 831 | } |
screamer | 0:7a64fbb4069d | 832 | return count; |
screamer | 0:7a64fbb4069d | 833 | } |
screamer | 0:7a64fbb4069d | 834 | |
screamer | 0:7a64fbb4069d | 835 | /** |
screamer | 0:7a64fbb4069d | 836 | * Frees a TCP segment (tcp_seg structure). |
screamer | 0:7a64fbb4069d | 837 | * |
screamer | 0:7a64fbb4069d | 838 | * @param seg single tcp_seg to free |
screamer | 0:7a64fbb4069d | 839 | * @return the number of pbufs that were deallocated |
screamer | 0:7a64fbb4069d | 840 | */ |
screamer | 0:7a64fbb4069d | 841 | u8_t |
screamer | 0:7a64fbb4069d | 842 | tcp_seg_free(struct tcp_seg *seg) |
screamer | 0:7a64fbb4069d | 843 | { |
screamer | 0:7a64fbb4069d | 844 | u8_t count = 0; |
screamer | 0:7a64fbb4069d | 845 | |
screamer | 0:7a64fbb4069d | 846 | if (seg != NULL) { |
screamer | 0:7a64fbb4069d | 847 | if (seg->p != NULL) { |
screamer | 0:7a64fbb4069d | 848 | count = pbuf_free(seg->p); |
screamer | 0:7a64fbb4069d | 849 | #if TCP_DEBUG |
screamer | 0:7a64fbb4069d | 850 | seg->p = NULL; |
screamer | 0:7a64fbb4069d | 851 | #endif /* TCP_DEBUG */ |
screamer | 0:7a64fbb4069d | 852 | } |
screamer | 0:7a64fbb4069d | 853 | memp_free(MEMP_TCP_SEG, seg); |
screamer | 0:7a64fbb4069d | 854 | } |
screamer | 0:7a64fbb4069d | 855 | return count; |
screamer | 0:7a64fbb4069d | 856 | } |
screamer | 0:7a64fbb4069d | 857 | |
screamer | 0:7a64fbb4069d | 858 | /** |
screamer | 0:7a64fbb4069d | 859 | * Sets the priority of a connection. |
screamer | 0:7a64fbb4069d | 860 | * |
screamer | 0:7a64fbb4069d | 861 | * @param pcb the tcp_pcb to manipulate |
screamer | 0:7a64fbb4069d | 862 | * @param prio new priority |
screamer | 0:7a64fbb4069d | 863 | */ |
screamer | 0:7a64fbb4069d | 864 | void |
screamer | 0:7a64fbb4069d | 865 | tcp_setprio(struct tcp_pcb *pcb, u8_t prio) |
screamer | 0:7a64fbb4069d | 866 | { |
screamer | 0:7a64fbb4069d | 867 | pcb->prio = prio; |
screamer | 0:7a64fbb4069d | 868 | } |
screamer | 0:7a64fbb4069d | 869 | #if TCP_QUEUE_OOSEQ |
screamer | 0:7a64fbb4069d | 870 | |
screamer | 0:7a64fbb4069d | 871 | /** |
screamer | 0:7a64fbb4069d | 872 | * Returns a copy of the given TCP segment. |
screamer | 0:7a64fbb4069d | 873 | * The pbuf and data are not copied, only the pointers |
screamer | 0:7a64fbb4069d | 874 | * |
screamer | 0:7a64fbb4069d | 875 | * @param seg the old tcp_seg |
screamer | 0:7a64fbb4069d | 876 | * @return a copy of seg |
screamer | 0:7a64fbb4069d | 877 | */ |
screamer | 0:7a64fbb4069d | 878 | struct tcp_seg * |
screamer | 0:7a64fbb4069d | 879 | tcp_seg_copy(struct tcp_seg *seg) |
screamer | 0:7a64fbb4069d | 880 | { |
screamer | 0:7a64fbb4069d | 881 | struct tcp_seg *cseg; |
screamer | 0:7a64fbb4069d | 882 | |
screamer | 0:7a64fbb4069d | 883 | cseg = (struct tcp_seg *)(memp_malloc(MEMP_TCP_SEG)); // static_cast<struct tcp_seg *>(x) |
screamer | 0:7a64fbb4069d | 884 | if (cseg == NULL) { |
screamer | 0:7a64fbb4069d | 885 | return NULL; |
screamer | 0:7a64fbb4069d | 886 | } |
screamer | 0:7a64fbb4069d | 887 | SMEMCPY((u8_t *)cseg, (const u8_t *)seg, sizeof(struct tcp_seg)); |
screamer | 0:7a64fbb4069d | 888 | pbuf_ref(cseg->p); |
screamer | 0:7a64fbb4069d | 889 | return cseg; |
screamer | 0:7a64fbb4069d | 890 | } |
screamer | 0:7a64fbb4069d | 891 | #endif |
screamer | 0:7a64fbb4069d | 892 | |
screamer | 0:7a64fbb4069d | 893 | #if LWIP_CALLBACK_API |
screamer | 0:7a64fbb4069d | 894 | /** |
screamer | 0:7a64fbb4069d | 895 | * Default receive callback that is called if the user didn't register |
screamer | 0:7a64fbb4069d | 896 | * a recv callback for the pcb. |
screamer | 0:7a64fbb4069d | 897 | */ |
screamer | 0:7a64fbb4069d | 898 | static err_t |
screamer | 0:7a64fbb4069d | 899 | tcp_recv_null(void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err) |
screamer | 0:7a64fbb4069d | 900 | { |
screamer | 0:7a64fbb4069d | 901 | arg = arg; |
screamer | 0:7a64fbb4069d | 902 | if (p != NULL) { |
screamer | 0:7a64fbb4069d | 903 | pbuf_free(p); |
screamer | 0:7a64fbb4069d | 904 | } else if (err == ERR_OK) { |
screamer | 0:7a64fbb4069d | 905 | return tcp_close(pcb); |
screamer | 0:7a64fbb4069d | 906 | } |
screamer | 0:7a64fbb4069d | 907 | return ERR_OK; |
screamer | 0:7a64fbb4069d | 908 | } |
screamer | 0:7a64fbb4069d | 909 | #endif /* LWIP_CALLBACK_API */ |
screamer | 0:7a64fbb4069d | 910 | |
screamer | 0:7a64fbb4069d | 911 | /** |
screamer | 0:7a64fbb4069d | 912 | * Kills the oldest active connection that has lower priority than prio. |
screamer | 0:7a64fbb4069d | 913 | * |
screamer | 0:7a64fbb4069d | 914 | * @param prio minimum priority |
screamer | 0:7a64fbb4069d | 915 | */ |
screamer | 0:7a64fbb4069d | 916 | static void |
screamer | 0:7a64fbb4069d | 917 | tcp_kill_prio(u8_t prio) |
screamer | 0:7a64fbb4069d | 918 | { |
screamer | 0:7a64fbb4069d | 919 | struct tcp_pcb *pcb, *inactive; |
screamer | 0:7a64fbb4069d | 920 | u32_t inactivity; |
screamer | 0:7a64fbb4069d | 921 | u8_t mprio; |
screamer | 0:7a64fbb4069d | 922 | |
screamer | 0:7a64fbb4069d | 923 | |
screamer | 0:7a64fbb4069d | 924 | mprio = TCP_PRIO_MAX; |
screamer | 0:7a64fbb4069d | 925 | |
screamer | 0:7a64fbb4069d | 926 | /* We kill the oldest active connection that has lower priority than prio. */ |
screamer | 0:7a64fbb4069d | 927 | inactivity = 0; |
screamer | 0:7a64fbb4069d | 928 | inactive = NULL; |
screamer | 0:7a64fbb4069d | 929 | for(pcb = tcp_active_pcbs; pcb != NULL; pcb = pcb->next) { |
screamer | 0:7a64fbb4069d | 930 | if (pcb->prio <= prio && |
screamer | 0:7a64fbb4069d | 931 | pcb->prio <= mprio && |
screamer | 0:7a64fbb4069d | 932 | (u32_t)(tcp_ticks - pcb->tmr) >= inactivity) { |
screamer | 0:7a64fbb4069d | 933 | inactivity = tcp_ticks - pcb->tmr; |
screamer | 0:7a64fbb4069d | 934 | inactive = pcb; |
screamer | 0:7a64fbb4069d | 935 | mprio = pcb->prio; |
screamer | 0:7a64fbb4069d | 936 | } |
screamer | 0:7a64fbb4069d | 937 | } |
screamer | 0:7a64fbb4069d | 938 | if (inactive != NULL) { |
screamer | 0:7a64fbb4069d | 939 | LWIP_DEBUGF(TCP_DEBUG, ("tcp_kill_prio: killing oldest PCB %p (%"S32_F")\n", |
screamer | 0:7a64fbb4069d | 940 | (void *)inactive, inactivity)); |
screamer | 0:7a64fbb4069d | 941 | tcp_abort(inactive); |
screamer | 0:7a64fbb4069d | 942 | } |
screamer | 0:7a64fbb4069d | 943 | } |
screamer | 0:7a64fbb4069d | 944 | |
screamer | 0:7a64fbb4069d | 945 | /** |
screamer | 0:7a64fbb4069d | 946 | * Kills the oldest connection that is in TIME_WAIT state. |
screamer | 0:7a64fbb4069d | 947 | * Called from tcp_alloc() if no more connections are available. |
screamer | 0:7a64fbb4069d | 948 | */ |
screamer | 0:7a64fbb4069d | 949 | static void |
screamer | 0:7a64fbb4069d | 950 | tcp_kill_timewait(void) |
screamer | 0:7a64fbb4069d | 951 | { |
screamer | 0:7a64fbb4069d | 952 | struct tcp_pcb *pcb, *inactive; |
screamer | 0:7a64fbb4069d | 953 | u32_t inactivity; |
screamer | 0:7a64fbb4069d | 954 | |
screamer | 0:7a64fbb4069d | 955 | inactivity = 0; |
screamer | 0:7a64fbb4069d | 956 | inactive = NULL; |
screamer | 0:7a64fbb4069d | 957 | /* Go through the list of TIME_WAIT pcbs and get the oldest pcb. */ |
screamer | 0:7a64fbb4069d | 958 | for(pcb = tcp_tw_pcbs; pcb != NULL; pcb = pcb->next) { |
screamer | 0:7a64fbb4069d | 959 | if ((u32_t)(tcp_ticks - pcb->tmr) >= inactivity) { |
screamer | 0:7a64fbb4069d | 960 | inactivity = tcp_ticks - pcb->tmr; |
screamer | 0:7a64fbb4069d | 961 | inactive = pcb; |
screamer | 0:7a64fbb4069d | 962 | } |
screamer | 0:7a64fbb4069d | 963 | } |
screamer | 0:7a64fbb4069d | 964 | if (inactive != NULL) { |
screamer | 0:7a64fbb4069d | 965 | LWIP_DEBUGF(TCP_DEBUG, ("tcp_kill_timewait: killing oldest TIME-WAIT PCB %p (%"S32_F")\n", |
screamer | 0:7a64fbb4069d | 966 | (void *)inactive, inactivity)); |
screamer | 0:7a64fbb4069d | 967 | tcp_abort(inactive); |
screamer | 0:7a64fbb4069d | 968 | } |
screamer | 0:7a64fbb4069d | 969 | } |
screamer | 0:7a64fbb4069d | 970 | |
screamer | 0:7a64fbb4069d | 971 | /** |
screamer | 0:7a64fbb4069d | 972 | * Allocate a new tcp_pcb structure. |
screamer | 0:7a64fbb4069d | 973 | * |
screamer | 0:7a64fbb4069d | 974 | * @param prio priority for the new pcb |
screamer | 0:7a64fbb4069d | 975 | * @return a new tcp_pcb that initially is in state CLOSED |
screamer | 0:7a64fbb4069d | 976 | */ |
screamer | 0:7a64fbb4069d | 977 | struct tcp_pcb * |
screamer | 0:7a64fbb4069d | 978 | tcp_alloc(u8_t prio) |
screamer | 0:7a64fbb4069d | 979 | { |
screamer | 0:7a64fbb4069d | 980 | struct tcp_pcb *pcb; |
screamer | 0:7a64fbb4069d | 981 | u32_t iss; |
screamer | 0:7a64fbb4069d | 982 | |
screamer | 0:7a64fbb4069d | 983 | pcb = (struct tcp_pcb *)(memp_malloc(MEMP_TCP_PCB)); // static_cast<struct tcp_pcb *>(x) |
screamer | 0:7a64fbb4069d | 984 | if (pcb == NULL) { |
screamer | 0:7a64fbb4069d | 985 | /* Try killing oldest connection in TIME-WAIT. */ |
screamer | 0:7a64fbb4069d | 986 | LWIP_DEBUGF(TCP_DEBUG, ("tcp_alloc: killing off oldest TIME-WAIT connection\n")); |
screamer | 0:7a64fbb4069d | 987 | tcp_kill_timewait(); |
screamer | 0:7a64fbb4069d | 988 | /* Try to allocate a tcp_pcb again. */ |
screamer | 0:7a64fbb4069d | 989 | pcb = (struct tcp_pcb *)(memp_malloc(MEMP_TCP_PCB)); // static_cast<struct tcp_pcb *>(x) |
screamer | 0:7a64fbb4069d | 990 | if (pcb == NULL) { |
screamer | 0:7a64fbb4069d | 991 | /* Try killing active connections with lower priority than the new one. */ |
screamer | 0:7a64fbb4069d | 992 | tcp_kill_prio(prio); |
screamer | 0:7a64fbb4069d | 993 | /* Try to allocate a tcp_pcb again. */ |
screamer | 0:7a64fbb4069d | 994 | pcb = (struct tcp_pcb *)(memp_malloc(MEMP_TCP_PCB)); // static_cast<struct tcp_pcb *>(x) |
screamer | 0:7a64fbb4069d | 995 | } |
screamer | 0:7a64fbb4069d | 996 | } |
screamer | 0:7a64fbb4069d | 997 | if (pcb != NULL) { |
screamer | 0:7a64fbb4069d | 998 | memset(pcb, 0, sizeof(struct tcp_pcb)); |
screamer | 0:7a64fbb4069d | 999 | pcb->prio = TCP_PRIO_NORMAL; |
screamer | 0:7a64fbb4069d | 1000 | pcb->snd_buf = TCP_SND_BUF; |
screamer | 0:7a64fbb4069d | 1001 | pcb->snd_queuelen = 0; |
screamer | 0:7a64fbb4069d | 1002 | pcb->rcv_wnd = TCP_WND; |
screamer | 0:7a64fbb4069d | 1003 | pcb->rcv_ann_wnd = TCP_WND; |
screamer | 0:7a64fbb4069d | 1004 | pcb->tos = 0; |
screamer | 0:7a64fbb4069d | 1005 | pcb->ttl = TCP_TTL; |
screamer | 0:7a64fbb4069d | 1006 | /* As initial send MSS, we use TCP_MSS but limit it to 536. |
screamer | 0:7a64fbb4069d | 1007 | The send MSS is updated when an MSS option is received. */ |
screamer | 0:7a64fbb4069d | 1008 | pcb->mss = (TCP_MSS > 536) ? 536 : TCP_MSS; |
screamer | 0:7a64fbb4069d | 1009 | pcb->rto = 3000 / TCP_SLOW_INTERVAL; |
screamer | 0:7a64fbb4069d | 1010 | pcb->sa = 0; |
screamer | 0:7a64fbb4069d | 1011 | pcb->sv = 3000 / TCP_SLOW_INTERVAL; |
screamer | 0:7a64fbb4069d | 1012 | pcb->rtime = -1; |
screamer | 0:7a64fbb4069d | 1013 | pcb->cwnd = 1; |
screamer | 0:7a64fbb4069d | 1014 | iss = tcp_next_iss(); |
screamer | 0:7a64fbb4069d | 1015 | pcb->snd_wl2 = iss; |
screamer | 0:7a64fbb4069d | 1016 | pcb->snd_nxt = iss; |
screamer | 0:7a64fbb4069d | 1017 | pcb->snd_max = iss; |
screamer | 0:7a64fbb4069d | 1018 | pcb->lastack = iss; |
screamer | 0:7a64fbb4069d | 1019 | pcb->snd_lbb = iss; |
screamer | 0:7a64fbb4069d | 1020 | pcb->tmr = tcp_ticks; |
screamer | 0:7a64fbb4069d | 1021 | |
screamer | 0:7a64fbb4069d | 1022 | pcb->polltmr = 0; |
screamer | 0:7a64fbb4069d | 1023 | |
screamer | 0:7a64fbb4069d | 1024 | #if LWIP_CALLBACK_API |
screamer | 0:7a64fbb4069d | 1025 | pcb->recv = tcp_recv_null; |
screamer | 0:7a64fbb4069d | 1026 | #endif /* LWIP_CALLBACK_API */ |
screamer | 0:7a64fbb4069d | 1027 | |
screamer | 0:7a64fbb4069d | 1028 | /* Init KEEPALIVE timer */ |
screamer | 0:7a64fbb4069d | 1029 | pcb->keep_idle = TCP_KEEPIDLE_DEFAULT; |
screamer | 0:7a64fbb4069d | 1030 | |
screamer | 0:7a64fbb4069d | 1031 | #if LWIP_TCP_KEEPALIVE |
screamer | 0:7a64fbb4069d | 1032 | pcb->keep_intvl = TCP_KEEPINTVL_DEFAULT; |
screamer | 0:7a64fbb4069d | 1033 | pcb->keep_cnt = TCP_KEEPCNT_DEFAULT; |
screamer | 0:7a64fbb4069d | 1034 | #endif /* LWIP_TCP_KEEPALIVE */ |
screamer | 0:7a64fbb4069d | 1035 | |
screamer | 0:7a64fbb4069d | 1036 | pcb->keep_cnt_sent = 0; |
screamer | 0:7a64fbb4069d | 1037 | } |
screamer | 0:7a64fbb4069d | 1038 | return pcb; |
screamer | 0:7a64fbb4069d | 1039 | } |
screamer | 0:7a64fbb4069d | 1040 | |
screamer | 0:7a64fbb4069d | 1041 | /** |
screamer | 0:7a64fbb4069d | 1042 | * Creates a new TCP protocol control block but doesn't place it on |
screamer | 0:7a64fbb4069d | 1043 | * any of the TCP PCB lists. |
screamer | 0:7a64fbb4069d | 1044 | * The pcb is not put on any list until binding using tcp_bind(). |
screamer | 0:7a64fbb4069d | 1045 | * |
screamer | 0:7a64fbb4069d | 1046 | * @internal: Maybe there should be a idle TCP PCB list where these |
screamer | 0:7a64fbb4069d | 1047 | * PCBs are put on. Port reservation using tcp_bind() is implemented but |
screamer | 0:7a64fbb4069d | 1048 | * allocated pcbs that are not bound can't be killed automatically if wanting |
screamer | 0:7a64fbb4069d | 1049 | * to allocate a pcb with higher prio (@see tcp_kill_prio()) |
screamer | 0:7a64fbb4069d | 1050 | * |
screamer | 0:7a64fbb4069d | 1051 | * @return a new tcp_pcb that initially is in state CLOSED |
screamer | 0:7a64fbb4069d | 1052 | */ |
screamer | 0:7a64fbb4069d | 1053 | struct tcp_pcb * |
screamer | 0:7a64fbb4069d | 1054 | tcp_new(void) |
screamer | 0:7a64fbb4069d | 1055 | { |
screamer | 0:7a64fbb4069d | 1056 | return tcp_alloc(TCP_PRIO_NORMAL); |
screamer | 0:7a64fbb4069d | 1057 | } |
screamer | 0:7a64fbb4069d | 1058 | |
screamer | 0:7a64fbb4069d | 1059 | /** |
screamer | 0:7a64fbb4069d | 1060 | * Used to specify the argument that should be passed callback |
screamer | 0:7a64fbb4069d | 1061 | * functions. |
screamer | 0:7a64fbb4069d | 1062 | * |
screamer | 0:7a64fbb4069d | 1063 | * @param pcb tcp_pcb to set the callback argument |
screamer | 0:7a64fbb4069d | 1064 | * @param arg void pointer argument to pass to callback functions |
screamer | 0:7a64fbb4069d | 1065 | */ |
screamer | 0:7a64fbb4069d | 1066 | void |
screamer | 0:7a64fbb4069d | 1067 | tcp_arg(struct tcp_pcb *pcb, void *arg) |
screamer | 0:7a64fbb4069d | 1068 | { |
screamer | 0:7a64fbb4069d | 1069 | pcb->callback_arg = arg; |
screamer | 0:7a64fbb4069d | 1070 | } |
screamer | 0:7a64fbb4069d | 1071 | #if LWIP_CALLBACK_API |
screamer | 0:7a64fbb4069d | 1072 | |
screamer | 0:7a64fbb4069d | 1073 | /** |
screamer | 0:7a64fbb4069d | 1074 | * Used to specify the function that should be called when a TCP |
screamer | 0:7a64fbb4069d | 1075 | * connection receives data. |
screamer | 0:7a64fbb4069d | 1076 | * |
screamer | 0:7a64fbb4069d | 1077 | * @param pcb tcp_pcb to set the recv callback |
screamer | 0:7a64fbb4069d | 1078 | * @param recv callback function to call for this pcb when data is received |
screamer | 0:7a64fbb4069d | 1079 | */ |
screamer | 0:7a64fbb4069d | 1080 | void |
screamer | 0:7a64fbb4069d | 1081 | tcp_recv(struct tcp_pcb *pcb, |
screamer | 0:7a64fbb4069d | 1082 | err_t (* recv)(void *arg, struct tcp_pcb *tpcb, struct pbuf *p, err_t err)) |
screamer | 0:7a64fbb4069d | 1083 | { |
screamer | 0:7a64fbb4069d | 1084 | pcb->recv = recv; |
screamer | 0:7a64fbb4069d | 1085 | } |
screamer | 0:7a64fbb4069d | 1086 | |
screamer | 0:7a64fbb4069d | 1087 | /** |
screamer | 0:7a64fbb4069d | 1088 | * Used to specify the function that should be called when TCP data |
screamer | 0:7a64fbb4069d | 1089 | * has been successfully delivered to the remote host. |
screamer | 0:7a64fbb4069d | 1090 | * |
screamer | 0:7a64fbb4069d | 1091 | * @param pcb tcp_pcb to set the sent callback |
screamer | 0:7a64fbb4069d | 1092 | * @param sent callback function to call for this pcb when data is successfully sent |
screamer | 0:7a64fbb4069d | 1093 | */ |
screamer | 0:7a64fbb4069d | 1094 | void |
screamer | 0:7a64fbb4069d | 1095 | tcp_sent(struct tcp_pcb *pcb, |
screamer | 0:7a64fbb4069d | 1096 | err_t (* sent)(void *arg, struct tcp_pcb *tpcb, u16_t len)) |
screamer | 0:7a64fbb4069d | 1097 | { |
screamer | 0:7a64fbb4069d | 1098 | pcb->sent = sent; |
screamer | 0:7a64fbb4069d | 1099 | } |
screamer | 0:7a64fbb4069d | 1100 | |
screamer | 0:7a64fbb4069d | 1101 | /** |
screamer | 0:7a64fbb4069d | 1102 | * Used to specify the function that should be called when a fatal error |
screamer | 0:7a64fbb4069d | 1103 | * has occured on the connection. |
screamer | 0:7a64fbb4069d | 1104 | * |
screamer | 0:7a64fbb4069d | 1105 | * @param pcb tcp_pcb to set the err callback |
screamer | 0:7a64fbb4069d | 1106 | * @param errf callback function to call for this pcb when a fatal error |
screamer | 0:7a64fbb4069d | 1107 | * has occured on the connection |
screamer | 0:7a64fbb4069d | 1108 | */ |
screamer | 0:7a64fbb4069d | 1109 | void |
screamer | 0:7a64fbb4069d | 1110 | tcp_err(struct tcp_pcb *pcb, |
screamer | 0:7a64fbb4069d | 1111 | void (* errf)(void *arg, err_t err)) |
screamer | 0:7a64fbb4069d | 1112 | { |
screamer | 0:7a64fbb4069d | 1113 | pcb->errf = errf; |
screamer | 0:7a64fbb4069d | 1114 | } |
screamer | 0:7a64fbb4069d | 1115 | |
screamer | 0:7a64fbb4069d | 1116 | /** |
screamer | 0:7a64fbb4069d | 1117 | * Used for specifying the function that should be called when a |
screamer | 0:7a64fbb4069d | 1118 | * LISTENing connection has been connected to another host. |
screamer | 0:7a64fbb4069d | 1119 | * |
screamer | 0:7a64fbb4069d | 1120 | * @param pcb tcp_pcb to set the accept callback |
screamer | 0:7a64fbb4069d | 1121 | * @param accept callback function to call for this pcb when LISTENing |
screamer | 0:7a64fbb4069d | 1122 | * connection has been connected to another host |
screamer | 0:7a64fbb4069d | 1123 | */ |
screamer | 0:7a64fbb4069d | 1124 | void |
screamer | 0:7a64fbb4069d | 1125 | tcp_accept(struct tcp_pcb *pcb, |
screamer | 0:7a64fbb4069d | 1126 | err_t (* accept)(void *arg, struct tcp_pcb *newpcb, err_t err)) |
screamer | 0:7a64fbb4069d | 1127 | { |
screamer | 0:7a64fbb4069d | 1128 | pcb->accept = accept; |
screamer | 0:7a64fbb4069d | 1129 | } |
screamer | 0:7a64fbb4069d | 1130 | #endif /* LWIP_CALLBACK_API */ |
screamer | 0:7a64fbb4069d | 1131 | |
screamer | 0:7a64fbb4069d | 1132 | |
screamer | 0:7a64fbb4069d | 1133 | /** |
screamer | 0:7a64fbb4069d | 1134 | * Used to specify the function that should be called periodically |
screamer | 0:7a64fbb4069d | 1135 | * from TCP. The interval is specified in terms of the TCP coarse |
screamer | 0:7a64fbb4069d | 1136 | * timer interval, which is called twice a second. |
screamer | 0:7a64fbb4069d | 1137 | * |
screamer | 0:7a64fbb4069d | 1138 | */ |
screamer | 0:7a64fbb4069d | 1139 | void |
screamer | 0:7a64fbb4069d | 1140 | tcp_poll(struct tcp_pcb *pcb, |
screamer | 0:7a64fbb4069d | 1141 | err_t (* poll)(void *arg, struct tcp_pcb *tpcb), u8_t interval) |
screamer | 0:7a64fbb4069d | 1142 | { |
screamer | 0:7a64fbb4069d | 1143 | #if LWIP_CALLBACK_API |
screamer | 0:7a64fbb4069d | 1144 | pcb->poll = poll; |
screamer | 0:7a64fbb4069d | 1145 | #endif /* LWIP_CALLBACK_API */ |
screamer | 0:7a64fbb4069d | 1146 | pcb->pollinterval = interval; |
screamer | 0:7a64fbb4069d | 1147 | } |
screamer | 0:7a64fbb4069d | 1148 | |
screamer | 0:7a64fbb4069d | 1149 | /** |
screamer | 0:7a64fbb4069d | 1150 | * Purges a TCP PCB. Removes any buffered data and frees the buffer memory |
screamer | 0:7a64fbb4069d | 1151 | * (pcb->ooseq, pcb->unsent and pcb->unacked are freed). |
screamer | 0:7a64fbb4069d | 1152 | * |
screamer | 0:7a64fbb4069d | 1153 | * @param pcb tcp_pcb to purge. The pcb itself is not deallocated! |
screamer | 0:7a64fbb4069d | 1154 | */ |
screamer | 0:7a64fbb4069d | 1155 | void |
screamer | 0:7a64fbb4069d | 1156 | tcp_pcb_purge(struct tcp_pcb *pcb) |
screamer | 0:7a64fbb4069d | 1157 | { |
screamer | 0:7a64fbb4069d | 1158 | if (pcb->state != CLOSED && |
screamer | 0:7a64fbb4069d | 1159 | pcb->state != TIME_WAIT && |
screamer | 0:7a64fbb4069d | 1160 | pcb->state != LISTEN) { |
screamer | 0:7a64fbb4069d | 1161 | |
screamer | 0:7a64fbb4069d | 1162 | LWIP_DEBUGF(TCP_DEBUG, ("tcp_pcb_purge\n")); |
screamer | 0:7a64fbb4069d | 1163 | |
screamer | 0:7a64fbb4069d | 1164 | #if TCP_LISTEN_BACKLOG |
screamer | 0:7a64fbb4069d | 1165 | if (pcb->state == SYN_RCVD) { |
screamer | 0:7a64fbb4069d | 1166 | /* Need to find the corresponding listen_pcb and decrease its accepts_pending */ |
screamer | 0:7a64fbb4069d | 1167 | struct tcp_pcb_listen *lpcb; |
screamer | 0:7a64fbb4069d | 1168 | LWIP_ASSERT("tcp_pcb_purge: pcb->state == SYN_RCVD but tcp_listen_pcbs is NULL", |
screamer | 0:7a64fbb4069d | 1169 | tcp_listen_pcbs.listen_pcbs != NULL); |
screamer | 0:7a64fbb4069d | 1170 | for (lpcb = tcp_listen_pcbs.listen_pcbs; lpcb != NULL; lpcb = lpcb->next) { |
screamer | 0:7a64fbb4069d | 1171 | if ((lpcb->local_port == pcb->local_port) && |
screamer | 0:7a64fbb4069d | 1172 | (ip_addr_isany(&lpcb->local_ip) || |
screamer | 0:7a64fbb4069d | 1173 | ip_addr_cmp(&pcb->local_ip, &lpcb->local_ip))) { |
screamer | 0:7a64fbb4069d | 1174 | /* port and address of the listen pcb match the timed-out pcb */ |
screamer | 0:7a64fbb4069d | 1175 | LWIP_ASSERT("tcp_pcb_purge: listen pcb does not have accepts pending", |
screamer | 0:7a64fbb4069d | 1176 | lpcb->accepts_pending > 0); |
screamer | 0:7a64fbb4069d | 1177 | lpcb->accepts_pending--; |
screamer | 0:7a64fbb4069d | 1178 | break; |
screamer | 0:7a64fbb4069d | 1179 | } |
screamer | 0:7a64fbb4069d | 1180 | } |
screamer | 0:7a64fbb4069d | 1181 | } |
screamer | 0:7a64fbb4069d | 1182 | #endif /* TCP_LISTEN_BACKLOG */ |
screamer | 0:7a64fbb4069d | 1183 | |
screamer | 0:7a64fbb4069d | 1184 | |
screamer | 0:7a64fbb4069d | 1185 | if (pcb->refused_data != NULL) { |
screamer | 0:7a64fbb4069d | 1186 | LWIP_DEBUGF(TCP_DEBUG, ("tcp_pcb_purge: data left on ->refused_data\n")); |
screamer | 0:7a64fbb4069d | 1187 | pbuf_free(pcb->refused_data); |
screamer | 0:7a64fbb4069d | 1188 | pcb->refused_data = NULL; |
screamer | 0:7a64fbb4069d | 1189 | } |
screamer | 0:7a64fbb4069d | 1190 | if (pcb->unsent != NULL) { |
screamer | 0:7a64fbb4069d | 1191 | LWIP_DEBUGF(TCP_DEBUG, ("tcp_pcb_purge: not all data sent\n")); |
screamer | 0:7a64fbb4069d | 1192 | } |
screamer | 0:7a64fbb4069d | 1193 | if (pcb->unacked != NULL) { |
screamer | 0:7a64fbb4069d | 1194 | LWIP_DEBUGF(TCP_DEBUG, ("tcp_pcb_purge: data left on ->unacked\n")); |
screamer | 0:7a64fbb4069d | 1195 | } |
screamer | 0:7a64fbb4069d | 1196 | #if TCP_QUEUE_OOSEQ /* LW */ |
screamer | 0:7a64fbb4069d | 1197 | if (pcb->ooseq != NULL) { |
screamer | 0:7a64fbb4069d | 1198 | LWIP_DEBUGF(TCP_DEBUG, ("tcp_pcb_purge: data left on ->ooseq\n")); |
screamer | 0:7a64fbb4069d | 1199 | } |
screamer | 0:7a64fbb4069d | 1200 | |
screamer | 0:7a64fbb4069d | 1201 | /* Stop the retransmission timer as it will expect data on unacked |
screamer | 0:7a64fbb4069d | 1202 | queue if it fires */ |
screamer | 0:7a64fbb4069d | 1203 | pcb->rtime = -1; |
screamer | 0:7a64fbb4069d | 1204 | |
screamer | 0:7a64fbb4069d | 1205 | tcp_segs_free(pcb->ooseq); |
screamer | 0:7a64fbb4069d | 1206 | pcb->ooseq = NULL; |
screamer | 0:7a64fbb4069d | 1207 | #endif /* TCP_QUEUE_OOSEQ */ |
screamer | 0:7a64fbb4069d | 1208 | tcp_segs_free(pcb->unsent); |
screamer | 0:7a64fbb4069d | 1209 | tcp_segs_free(pcb->unacked); |
screamer | 0:7a64fbb4069d | 1210 | pcb->unacked = pcb->unsent = NULL; |
screamer | 0:7a64fbb4069d | 1211 | } |
screamer | 0:7a64fbb4069d | 1212 | } |
screamer | 0:7a64fbb4069d | 1213 | |
screamer | 0:7a64fbb4069d | 1214 | /** |
screamer | 0:7a64fbb4069d | 1215 | * Purges the PCB and removes it from a PCB list. Any delayed ACKs are sent first. |
screamer | 0:7a64fbb4069d | 1216 | * |
screamer | 0:7a64fbb4069d | 1217 | * @param pcblist PCB list to purge. |
screamer | 0:7a64fbb4069d | 1218 | * @param pcb tcp_pcb to purge. The pcb itself is also deallocated! |
screamer | 0:7a64fbb4069d | 1219 | */ |
screamer | 0:7a64fbb4069d | 1220 | void |
screamer | 0:7a64fbb4069d | 1221 | tcp_pcb_remove(struct tcp_pcb **pcblist, struct tcp_pcb *pcb) |
screamer | 0:7a64fbb4069d | 1222 | { |
screamer | 0:7a64fbb4069d | 1223 | TCP_RMV(pcblist, pcb); |
screamer | 0:7a64fbb4069d | 1224 | |
screamer | 0:7a64fbb4069d | 1225 | tcp_pcb_purge(pcb); |
screamer | 0:7a64fbb4069d | 1226 | |
screamer | 0:7a64fbb4069d | 1227 | /* if there is an outstanding delayed ACKs, send it */ |
screamer | 0:7a64fbb4069d | 1228 | if (pcb->state != TIME_WAIT && |
screamer | 0:7a64fbb4069d | 1229 | pcb->state != LISTEN && |
screamer | 0:7a64fbb4069d | 1230 | pcb->flags & TF_ACK_DELAY) { |
screamer | 0:7a64fbb4069d | 1231 | pcb->flags |= TF_ACK_NOW; |
screamer | 0:7a64fbb4069d | 1232 | tcp_output(pcb); |
screamer | 0:7a64fbb4069d | 1233 | } |
screamer | 0:7a64fbb4069d | 1234 | |
screamer | 0:7a64fbb4069d | 1235 | if (pcb->state != LISTEN) { |
screamer | 0:7a64fbb4069d | 1236 | LWIP_ASSERT("unsent segments leaking", pcb->unsent == NULL); |
screamer | 0:7a64fbb4069d | 1237 | LWIP_ASSERT("unacked segments leaking", pcb->unacked == NULL); |
screamer | 0:7a64fbb4069d | 1238 | #if TCP_QUEUE_OOSEQ |
screamer | 0:7a64fbb4069d | 1239 | LWIP_ASSERT("ooseq segments leaking", pcb->ooseq == NULL); |
screamer | 0:7a64fbb4069d | 1240 | #endif /* TCP_QUEUE_OOSEQ */ |
screamer | 0:7a64fbb4069d | 1241 | } |
screamer | 0:7a64fbb4069d | 1242 | |
screamer | 0:7a64fbb4069d | 1243 | pcb->state = CLOSED; |
screamer | 0:7a64fbb4069d | 1244 | |
screamer | 0:7a64fbb4069d | 1245 | LWIP_ASSERT("tcp_pcb_remove: tcp_pcbs_sane()", tcp_pcbs_sane()); |
screamer | 0:7a64fbb4069d | 1246 | } |
screamer | 0:7a64fbb4069d | 1247 | |
screamer | 0:7a64fbb4069d | 1248 | /** |
screamer | 0:7a64fbb4069d | 1249 | * Calculates a new initial sequence number for new connections. |
screamer | 0:7a64fbb4069d | 1250 | * |
screamer | 0:7a64fbb4069d | 1251 | * @return u32_t pseudo random sequence number |
screamer | 0:7a64fbb4069d | 1252 | */ |
screamer | 0:7a64fbb4069d | 1253 | u32_t |
screamer | 0:7a64fbb4069d | 1254 | tcp_next_iss(void) |
screamer | 0:7a64fbb4069d | 1255 | { |
screamer | 0:7a64fbb4069d | 1256 | static u32_t iss = 6510; |
screamer | 0:7a64fbb4069d | 1257 | |
screamer | 0:7a64fbb4069d | 1258 | iss += tcp_ticks; /* XXX */ |
screamer | 0:7a64fbb4069d | 1259 | return iss; |
screamer | 0:7a64fbb4069d | 1260 | } |
screamer | 0:7a64fbb4069d | 1261 | |
screamer | 0:7a64fbb4069d | 1262 | #if TCP_CALCULATE_EFF_SEND_MSS |
screamer | 0:7a64fbb4069d | 1263 | /** |
screamer | 0:7a64fbb4069d | 1264 | * Calcluates the effective send mss that can be used for a specific IP address |
screamer | 0:7a64fbb4069d | 1265 | * by using ip_route to determin the netif used to send to the address and |
screamer | 0:7a64fbb4069d | 1266 | * calculating the minimum of TCP_MSS and that netif's mtu (if set). |
screamer | 0:7a64fbb4069d | 1267 | */ |
screamer | 0:7a64fbb4069d | 1268 | u16_t |
screamer | 0:7a64fbb4069d | 1269 | tcp_eff_send_mss(u16_t sendmss, struct ip_addr *addr) |
screamer | 0:7a64fbb4069d | 1270 | { |
screamer | 0:7a64fbb4069d | 1271 | u16_t mss_s; |
screamer | 0:7a64fbb4069d | 1272 | struct netif *outif; |
screamer | 0:7a64fbb4069d | 1273 | |
screamer | 0:7a64fbb4069d | 1274 | outif = ip_route(addr); |
screamer | 0:7a64fbb4069d | 1275 | if ((outif != NULL) && (outif->mtu != 0)) { |
screamer | 0:7a64fbb4069d | 1276 | mss_s = outif->mtu - IP_HLEN - TCP_HLEN; |
screamer | 0:7a64fbb4069d | 1277 | /* RFC 1122, chap 4.2.2.6: |
screamer | 0:7a64fbb4069d | 1278 | * Eff.snd.MSS = min(SendMSS+20, MMS_S) - TCPhdrsize - IPoptionsize |
screamer | 0:7a64fbb4069d | 1279 | * We correct for TCP options in tcp_enqueue(), and don't support |
screamer | 0:7a64fbb4069d | 1280 | * IP options |
screamer | 0:7a64fbb4069d | 1281 | */ |
screamer | 0:7a64fbb4069d | 1282 | sendmss = LWIP_MIN(sendmss, mss_s); |
screamer | 0:7a64fbb4069d | 1283 | } |
screamer | 0:7a64fbb4069d | 1284 | return sendmss; |
screamer | 0:7a64fbb4069d | 1285 | } |
screamer | 0:7a64fbb4069d | 1286 | #endif /* TCP_CALCULATE_EFF_SEND_MSS */ |
screamer | 0:7a64fbb4069d | 1287 | |
screamer | 0:7a64fbb4069d | 1288 | #if TCP_DEBUG || TCP_INPUT_DEBUG || TCP_OUTPUT_DEBUG |
screamer | 0:7a64fbb4069d | 1289 | /** |
screamer | 0:7a64fbb4069d | 1290 | * Print a tcp header for debugging purposes. |
screamer | 0:7a64fbb4069d | 1291 | * |
screamer | 0:7a64fbb4069d | 1292 | * @param tcphdr pointer to a struct tcp_hdr |
screamer | 0:7a64fbb4069d | 1293 | */ |
screamer | 0:7a64fbb4069d | 1294 | void |
screamer | 0:7a64fbb4069d | 1295 | tcp_debug_print(struct tcp_hdr *tcphdr) |
screamer | 0:7a64fbb4069d | 1296 | { |
screamer | 0:7a64fbb4069d | 1297 | LWIP_DEBUGF(TCP_DEBUG, ("TCP header:\n")); |
screamer | 0:7a64fbb4069d | 1298 | LWIP_DEBUGF(TCP_DEBUG, ("+-------------------------------+\n")); |
screamer | 0:7a64fbb4069d | 1299 | LWIP_DEBUGF(TCP_DEBUG, ("| %5"U16_F" | %5"U16_F" | (src port, dest port)\n", |
screamer | 0:7a64fbb4069d | 1300 | ntohs(tcphdr->src), ntohs(tcphdr->dest))); |
screamer | 0:7a64fbb4069d | 1301 | LWIP_DEBUGF(TCP_DEBUG, ("+-------------------------------+\n")); |
screamer | 0:7a64fbb4069d | 1302 | LWIP_DEBUGF(TCP_DEBUG, ("| %010"U32_F" | (seq no)\n", |
screamer | 0:7a64fbb4069d | 1303 | ntohl(tcphdr->seqno))); |
screamer | 0:7a64fbb4069d | 1304 | LWIP_DEBUGF(TCP_DEBUG, ("+-------------------------------+\n")); |
screamer | 0:7a64fbb4069d | 1305 | LWIP_DEBUGF(TCP_DEBUG, ("| %010"U32_F" | (ack no)\n", |
screamer | 0:7a64fbb4069d | 1306 | ntohl(tcphdr->ackno))); |
screamer | 0:7a64fbb4069d | 1307 | LWIP_DEBUGF(TCP_DEBUG, ("+-------------------------------+\n")); |
screamer | 0:7a64fbb4069d | 1308 | LWIP_DEBUGF(TCP_DEBUG, ("| %2"U16_F" | |%"U16_F"%"U16_F"%"U16_F"%"U16_F"%"U16_F"%"U16_F"| %5"U16_F" | (hdrlen, flags (", |
screamer | 0:7a64fbb4069d | 1309 | TCPH_HDRLEN(tcphdr), |
screamer | 0:7a64fbb4069d | 1310 | TCPH_FLAGS(tcphdr) >> 5 & 1, |
screamer | 0:7a64fbb4069d | 1311 | TCPH_FLAGS(tcphdr) >> 4 & 1, |
screamer | 0:7a64fbb4069d | 1312 | TCPH_FLAGS(tcphdr) >> 3 & 1, |
screamer | 0:7a64fbb4069d | 1313 | TCPH_FLAGS(tcphdr) >> 2 & 1, |
screamer | 0:7a64fbb4069d | 1314 | TCPH_FLAGS(tcphdr) >> 1 & 1, |
screamer | 0:7a64fbb4069d | 1315 | TCPH_FLAGS(tcphdr) & 1, |
screamer | 0:7a64fbb4069d | 1316 | ntohs(tcphdr->wnd))); |
screamer | 0:7a64fbb4069d | 1317 | tcp_debug_print_flags(TCPH_FLAGS(tcphdr)); |
screamer | 0:7a64fbb4069d | 1318 | LWIP_DEBUGF(TCP_DEBUG, ("), win)\n")); |
screamer | 0:7a64fbb4069d | 1319 | LWIP_DEBUGF(TCP_DEBUG, ("+-------------------------------+\n")); |
screamer | 0:7a64fbb4069d | 1320 | LWIP_DEBUGF(TCP_DEBUG, ("| 0x%04"X16_F" | %5"U16_F" | (chksum, urgp)\n", |
screamer | 0:7a64fbb4069d | 1321 | ntohs(tcphdr->chksum), ntohs(tcphdr->urgp))); |
screamer | 0:7a64fbb4069d | 1322 | LWIP_DEBUGF(TCP_DEBUG, ("+-------------------------------+\n")); |
screamer | 0:7a64fbb4069d | 1323 | } |
screamer | 0:7a64fbb4069d | 1324 | |
screamer | 0:7a64fbb4069d | 1325 | /** |
screamer | 0:7a64fbb4069d | 1326 | * Print a tcp state for debugging purposes. |
screamer | 0:7a64fbb4069d | 1327 | * |
screamer | 0:7a64fbb4069d | 1328 | * @param s enum tcp_state to print |
screamer | 0:7a64fbb4069d | 1329 | */ |
screamer | 0:7a64fbb4069d | 1330 | void |
screamer | 0:7a64fbb4069d | 1331 | tcp_debug_print_state(enum tcp_state s) |
screamer | 0:7a64fbb4069d | 1332 | { |
screamer | 0:7a64fbb4069d | 1333 | LWIP_DEBUGF(TCP_DEBUG, ("State: ")); |
screamer | 0:7a64fbb4069d | 1334 | switch (s) { |
screamer | 0:7a64fbb4069d | 1335 | case CLOSED: |
screamer | 0:7a64fbb4069d | 1336 | LWIP_DEBUGF(TCP_DEBUG, ("CLOSED\n")); |
screamer | 0:7a64fbb4069d | 1337 | break; |
screamer | 0:7a64fbb4069d | 1338 | case LISTEN: |
screamer | 0:7a64fbb4069d | 1339 | LWIP_DEBUGF(TCP_DEBUG, ("LISTEN\n")); |
screamer | 0:7a64fbb4069d | 1340 | break; |
screamer | 0:7a64fbb4069d | 1341 | case SYN_SENT: |
screamer | 0:7a64fbb4069d | 1342 | LWIP_DEBUGF(TCP_DEBUG, ("SYN_SENT\n")); |
screamer | 0:7a64fbb4069d | 1343 | break; |
screamer | 0:7a64fbb4069d | 1344 | case SYN_RCVD: |
screamer | 0:7a64fbb4069d | 1345 | LWIP_DEBUGF(TCP_DEBUG, ("SYN_RCVD\n")); |
screamer | 0:7a64fbb4069d | 1346 | break; |
screamer | 0:7a64fbb4069d | 1347 | case ESTABLISHED: |
screamer | 0:7a64fbb4069d | 1348 | LWIP_DEBUGF(TCP_DEBUG, ("ESTABLISHED\n")); |
screamer | 0:7a64fbb4069d | 1349 | break; |
screamer | 0:7a64fbb4069d | 1350 | case FIN_WAIT_1: |
screamer | 0:7a64fbb4069d | 1351 | LWIP_DEBUGF(TCP_DEBUG, ("FIN_WAIT_1\n")); |
screamer | 0:7a64fbb4069d | 1352 | break; |
screamer | 0:7a64fbb4069d | 1353 | case FIN_WAIT_2: |
screamer | 0:7a64fbb4069d | 1354 | LWIP_DEBUGF(TCP_DEBUG, ("FIN_WAIT_2\n")); |
screamer | 0:7a64fbb4069d | 1355 | break; |
screamer | 0:7a64fbb4069d | 1356 | case CLOSE_WAIT: |
screamer | 0:7a64fbb4069d | 1357 | LWIP_DEBUGF(TCP_DEBUG, ("CLOSE_WAIT\n")); |
screamer | 0:7a64fbb4069d | 1358 | break; |
screamer | 0:7a64fbb4069d | 1359 | case CLOSING: |
screamer | 0:7a64fbb4069d | 1360 | LWIP_DEBUGF(TCP_DEBUG, ("CLOSING\n")); |
screamer | 0:7a64fbb4069d | 1361 | break; |
screamer | 0:7a64fbb4069d | 1362 | case LAST_ACK: |
screamer | 0:7a64fbb4069d | 1363 | LWIP_DEBUGF(TCP_DEBUG, ("LAST_ACK\n")); |
screamer | 0:7a64fbb4069d | 1364 | break; |
screamer | 0:7a64fbb4069d | 1365 | case TIME_WAIT: |
screamer | 0:7a64fbb4069d | 1366 | LWIP_DEBUGF(TCP_DEBUG, ("TIME_WAIT\n")); |
screamer | 0:7a64fbb4069d | 1367 | break; |
screamer | 0:7a64fbb4069d | 1368 | } |
screamer | 0:7a64fbb4069d | 1369 | } |
screamer | 0:7a64fbb4069d | 1370 | |
screamer | 0:7a64fbb4069d | 1371 | /** |
screamer | 0:7a64fbb4069d | 1372 | * Print tcp flags for debugging purposes. |
screamer | 0:7a64fbb4069d | 1373 | * |
screamer | 0:7a64fbb4069d | 1374 | * @param flags tcp flags, all active flags are printed |
screamer | 0:7a64fbb4069d | 1375 | */ |
screamer | 0:7a64fbb4069d | 1376 | void |
screamer | 0:7a64fbb4069d | 1377 | tcp_debug_print_flags(u8_t flags) |
screamer | 0:7a64fbb4069d | 1378 | { |
screamer | 0:7a64fbb4069d | 1379 | if (flags & TCP_FIN) { |
screamer | 0:7a64fbb4069d | 1380 | LWIP_DEBUGF(TCP_DEBUG, ("FIN ")); |
screamer | 0:7a64fbb4069d | 1381 | } |
screamer | 0:7a64fbb4069d | 1382 | if (flags & TCP_SYN) { |
screamer | 0:7a64fbb4069d | 1383 | LWIP_DEBUGF(TCP_DEBUG, ("SYN ")); |
screamer | 0:7a64fbb4069d | 1384 | } |
screamer | 0:7a64fbb4069d | 1385 | if (flags & TCP_RST) { |
screamer | 0:7a64fbb4069d | 1386 | LWIP_DEBUGF(TCP_DEBUG, ("RST ")); |
screamer | 0:7a64fbb4069d | 1387 | } |
screamer | 0:7a64fbb4069d | 1388 | if (flags & TCP_PSH) { |
screamer | 0:7a64fbb4069d | 1389 | LWIP_DEBUGF(TCP_DEBUG, ("PSH ")); |
screamer | 0:7a64fbb4069d | 1390 | } |
screamer | 0:7a64fbb4069d | 1391 | if (flags & TCP_ACK) { |
screamer | 0:7a64fbb4069d | 1392 | LWIP_DEBUGF(TCP_DEBUG, ("ACK ")); |
screamer | 0:7a64fbb4069d | 1393 | } |
screamer | 0:7a64fbb4069d | 1394 | if (flags & TCP_URG) { |
screamer | 0:7a64fbb4069d | 1395 | LWIP_DEBUGF(TCP_DEBUG, ("URG ")); |
screamer | 0:7a64fbb4069d | 1396 | } |
screamer | 0:7a64fbb4069d | 1397 | if (flags & TCP_ECE) { |
screamer | 0:7a64fbb4069d | 1398 | LWIP_DEBUGF(TCP_DEBUG, ("ECE ")); |
screamer | 0:7a64fbb4069d | 1399 | } |
screamer | 0:7a64fbb4069d | 1400 | if (flags & TCP_CWR) { |
screamer | 0:7a64fbb4069d | 1401 | LWIP_DEBUGF(TCP_DEBUG, ("CWR ")); |
screamer | 0:7a64fbb4069d | 1402 | } |
screamer | 0:7a64fbb4069d | 1403 | } |
screamer | 0:7a64fbb4069d | 1404 | |
screamer | 0:7a64fbb4069d | 1405 | /** |
screamer | 0:7a64fbb4069d | 1406 | * Print all tcp_pcbs in every list for debugging purposes. |
screamer | 0:7a64fbb4069d | 1407 | */ |
screamer | 0:7a64fbb4069d | 1408 | void |
screamer | 0:7a64fbb4069d | 1409 | tcp_debug_print_pcbs(void) |
screamer | 0:7a64fbb4069d | 1410 | { |
screamer | 0:7a64fbb4069d | 1411 | struct tcp_pcb *pcb; |
screamer | 0:7a64fbb4069d | 1412 | LWIP_DEBUGF(TCP_DEBUG, ("Active PCB states:\n")); |
screamer | 0:7a64fbb4069d | 1413 | for(pcb = tcp_active_pcbs; pcb != NULL; pcb = pcb->next) { |
screamer | 0:7a64fbb4069d | 1414 | LWIP_DEBUGF(TCP_DEBUG, ("Local port %"U16_F", foreign port %"U16_F" snd_nxt %"U32_F" rcv_nxt %"U32_F" ", |
screamer | 0:7a64fbb4069d | 1415 | pcb->local_port, pcb->remote_port, |
screamer | 0:7a64fbb4069d | 1416 | pcb->snd_nxt, pcb->rcv_nxt)); |
screamer | 0:7a64fbb4069d | 1417 | tcp_debug_print_state(pcb->state); |
screamer | 0:7a64fbb4069d | 1418 | } |
screamer | 0:7a64fbb4069d | 1419 | LWIP_DEBUGF(TCP_DEBUG, ("Listen PCB states:\n")); |
screamer | 0:7a64fbb4069d | 1420 | for(pcb = (struct tcp_pcb *)tcp_listen_pcbs.pcbs; pcb != NULL; pcb = pcb->next) { |
screamer | 0:7a64fbb4069d | 1421 | LWIP_DEBUGF(TCP_DEBUG, ("Local port %"U16_F", foreign port %"U16_F" snd_nxt %"U32_F" rcv_nxt %"U32_F" ", |
screamer | 0:7a64fbb4069d | 1422 | pcb->local_port, pcb->remote_port, |
screamer | 0:7a64fbb4069d | 1423 | pcb->snd_nxt, pcb->rcv_nxt)); |
screamer | 0:7a64fbb4069d | 1424 | tcp_debug_print_state(pcb->state); |
screamer | 0:7a64fbb4069d | 1425 | } |
screamer | 0:7a64fbb4069d | 1426 | LWIP_DEBUGF(TCP_DEBUG, ("TIME-WAIT PCB states:\n")); |
screamer | 0:7a64fbb4069d | 1427 | for(pcb = tcp_tw_pcbs; pcb != NULL; pcb = pcb->next) { |
screamer | 0:7a64fbb4069d | 1428 | LWIP_DEBUGF(TCP_DEBUG, ("Local port %"U16_F", foreign port %"U16_F" snd_nxt %"U32_F" rcv_nxt %"U32_F" ", |
screamer | 0:7a64fbb4069d | 1429 | pcb->local_port, pcb->remote_port, |
screamer | 0:7a64fbb4069d | 1430 | pcb->snd_nxt, pcb->rcv_nxt)); |
screamer | 0:7a64fbb4069d | 1431 | tcp_debug_print_state(pcb->state); |
screamer | 0:7a64fbb4069d | 1432 | } |
screamer | 0:7a64fbb4069d | 1433 | } |
screamer | 0:7a64fbb4069d | 1434 | |
screamer | 0:7a64fbb4069d | 1435 | /** |
screamer | 0:7a64fbb4069d | 1436 | * Check state consistency of the tcp_pcb lists. |
screamer | 0:7a64fbb4069d | 1437 | */ |
screamer | 0:7a64fbb4069d | 1438 | s16_t |
screamer | 0:7a64fbb4069d | 1439 | tcp_pcbs_sane(void) |
screamer | 0:7a64fbb4069d | 1440 | { |
screamer | 0:7a64fbb4069d | 1441 | struct tcp_pcb *pcb; |
screamer | 0:7a64fbb4069d | 1442 | for(pcb = tcp_active_pcbs; pcb != NULL; pcb = pcb->next) { |
screamer | 0:7a64fbb4069d | 1443 | LWIP_ASSERT("tcp_pcbs_sane: active pcb->state != CLOSED", pcb->state != CLOSED); |
screamer | 0:7a64fbb4069d | 1444 | LWIP_ASSERT("tcp_pcbs_sane: active pcb->state != LISTEN", pcb->state != LISTEN); |
screamer | 0:7a64fbb4069d | 1445 | LWIP_ASSERT("tcp_pcbs_sane: active pcb->state != TIME-WAIT", pcb->state != TIME_WAIT); |
screamer | 0:7a64fbb4069d | 1446 | } |
screamer | 0:7a64fbb4069d | 1447 | for(pcb = tcp_tw_pcbs; pcb != NULL; pcb = pcb->next) { |
screamer | 0:7a64fbb4069d | 1448 | LWIP_ASSERT("tcp_pcbs_sane: tw pcb->state == TIME-WAIT", pcb->state == TIME_WAIT); |
screamer | 0:7a64fbb4069d | 1449 | } |
screamer | 0:7a64fbb4069d | 1450 | return 1; |
screamer | 0:7a64fbb4069d | 1451 | } |
screamer | 0:7a64fbb4069d | 1452 | #endif /* TCP_DEBUG */ |
screamer | 0:7a64fbb4069d | 1453 | |
screamer | 0:7a64fbb4069d | 1454 | #endif /* LWIP_TCP */ |