Mike Pulice / ublox_C200Test

Integrating the ublox LISA C200 modem

Fork of SprintUSBModemHTTPClientTest by Donatien Garnier

SprintUSBModem/lwip/include/lwip/tcp_impl.h@5:3f93dd1d4cb3, 2013-09-26 (annotated)

Committer:
sam_grove
Date:
Thu Sep 26 00:44:20 2013 -0500
Revision:
5:3f93dd1d4cb3
Exported program and replaced contents of the repo with the source

to build and debug using keil mdk. Libs NOT upto date are lwip, lwip-sys

and socket. these have newer versions under mbed_official but were starting

from a know working point

Who changed what in which revision?

UserRevisionLine numberNew contents of line
sam_grove 5:3f93dd1d4cb3 1 /*
sam_grove 5:3f93dd1d4cb3 2 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
sam_grove 5:3f93dd1d4cb3 3 * All rights reserved.
sam_grove 5:3f93dd1d4cb3 4 *
sam_grove 5:3f93dd1d4cb3 5 * Redistribution and use in source and binary forms, with or without modification,
sam_grove 5:3f93dd1d4cb3 6 * are permitted provided that the following conditions are met:
sam_grove 5:3f93dd1d4cb3 7 *
sam_grove 5:3f93dd1d4cb3 8 * 1. Redistributions of source code must retain the above copyright notice,
sam_grove 5:3f93dd1d4cb3 9 * this list of conditions and the following disclaimer.
sam_grove 5:3f93dd1d4cb3 10 * 2. Redistributions in binary form must reproduce the above copyright notice,
sam_grove 5:3f93dd1d4cb3 11 * this list of conditions and the following disclaimer in the documentation
sam_grove 5:3f93dd1d4cb3 12 * and/or other materials provided with the distribution.
sam_grove 5:3f93dd1d4cb3 13 * 3. The name of the author may not be used to endorse or promote products
sam_grove 5:3f93dd1d4cb3 14 * derived from this software without specific prior written permission.
sam_grove 5:3f93dd1d4cb3 15 *
sam_grove 5:3f93dd1d4cb3 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
sam_grove 5:3f93dd1d4cb3 17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
sam_grove 5:3f93dd1d4cb3 18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
sam_grove 5:3f93dd1d4cb3 19 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
sam_grove 5:3f93dd1d4cb3 20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
sam_grove 5:3f93dd1d4cb3 21 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
sam_grove 5:3f93dd1d4cb3 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
sam_grove 5:3f93dd1d4cb3 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
sam_grove 5:3f93dd1d4cb3 24 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
sam_grove 5:3f93dd1d4cb3 25 * OF SUCH DAMAGE.
sam_grove 5:3f93dd1d4cb3 26 *
sam_grove 5:3f93dd1d4cb3 27 * This file is part of the lwIP TCP/IP stack.
sam_grove 5:3f93dd1d4cb3 28 *
sam_grove 5:3f93dd1d4cb3 29 * Author: Adam Dunkels <adam@sics.se>
sam_grove 5:3f93dd1d4cb3 30 *
sam_grove 5:3f93dd1d4cb3 31 */
sam_grove 5:3f93dd1d4cb3 32 #ifndef __LWIP_TCP_IMPL_H__
sam_grove 5:3f93dd1d4cb3 33 #define __LWIP_TCP_IMPL_H__
sam_grove 5:3f93dd1d4cb3 34
sam_grove 5:3f93dd1d4cb3 35 #include "lwip/opt.h"
sam_grove 5:3f93dd1d4cb3 36
sam_grove 5:3f93dd1d4cb3 37 #if LWIP_TCP /* don't build if not configured for use in lwipopts.h */
sam_grove 5:3f93dd1d4cb3 38
sam_grove 5:3f93dd1d4cb3 39 #include "lwip/tcp.h"
sam_grove 5:3f93dd1d4cb3 40 #include "lwip/sys.h"
sam_grove 5:3f93dd1d4cb3 41 #include "lwip/mem.h"
sam_grove 5:3f93dd1d4cb3 42 #include "lwip/pbuf.h"
sam_grove 5:3f93dd1d4cb3 43 #include "lwip/ip.h"
sam_grove 5:3f93dd1d4cb3 44 #include "lwip/icmp.h"
sam_grove 5:3f93dd1d4cb3 45 #include "lwip/err.h"
sam_grove 5:3f93dd1d4cb3 46
sam_grove 5:3f93dd1d4cb3 47 #ifdef __cplusplus
sam_grove 5:3f93dd1d4cb3 48 extern "C" {
sam_grove 5:3f93dd1d4cb3 49 #endif
sam_grove 5:3f93dd1d4cb3 50
sam_grove 5:3f93dd1d4cb3 51 /* Functions for interfacing with TCP: */
sam_grove 5:3f93dd1d4cb3 52
sam_grove 5:3f93dd1d4cb3 53 /* Lower layer interface to TCP: */
sam_grove 5:3f93dd1d4cb3 54 #define tcp_init() /* Compatibility define, no init needed. */
sam_grove 5:3f93dd1d4cb3 55 void tcp_tmr (void); /* Must be called every
sam_grove 5:3f93dd1d4cb3 56 TCP_TMR_INTERVAL
sam_grove 5:3f93dd1d4cb3 57 ms. (Typically 250 ms). */
sam_grove 5:3f93dd1d4cb3 58 /* It is also possible to call these two functions at the right
sam_grove 5:3f93dd1d4cb3 59 intervals (instead of calling tcp_tmr()). */
sam_grove 5:3f93dd1d4cb3 60 void tcp_slowtmr (void);
sam_grove 5:3f93dd1d4cb3 61 void tcp_fasttmr (void);
sam_grove 5:3f93dd1d4cb3 62
sam_grove 5:3f93dd1d4cb3 63
sam_grove 5:3f93dd1d4cb3 64 /* Only used by IP to pass a TCP segment to TCP: */
sam_grove 5:3f93dd1d4cb3 65 void tcp_input (struct pbuf *p, struct netif *inp);
sam_grove 5:3f93dd1d4cb3 66 /* Used within the TCP code only: */
sam_grove 5:3f93dd1d4cb3 67 struct tcp_pcb * tcp_alloc (u8_t prio);
sam_grove 5:3f93dd1d4cb3 68 void tcp_abandon (struct tcp_pcb *pcb, int reset);
sam_grove 5:3f93dd1d4cb3 69 err_t tcp_send_empty_ack(struct tcp_pcb *pcb);
sam_grove 5:3f93dd1d4cb3 70 void tcp_rexmit (struct tcp_pcb *pcb);
sam_grove 5:3f93dd1d4cb3 71 void tcp_rexmit_rto (struct tcp_pcb *pcb);
sam_grove 5:3f93dd1d4cb3 72 void tcp_rexmit_fast (struct tcp_pcb *pcb);
sam_grove 5:3f93dd1d4cb3 73 u32_t tcp_update_rcv_ann_wnd(struct tcp_pcb *pcb);
sam_grove 5:3f93dd1d4cb3 74
sam_grove 5:3f93dd1d4cb3 75 /**
sam_grove 5:3f93dd1d4cb3 76 * This is the Nagle algorithm: try to combine user data to send as few TCP
sam_grove 5:3f93dd1d4cb3 77 * segments as possible. Only send if
sam_grove 5:3f93dd1d4cb3 78 * - no previously transmitted data on the connection remains unacknowledged or
sam_grove 5:3f93dd1d4cb3 79 * - the TF_NODELAY flag is set (nagle algorithm turned off for this pcb) or
sam_grove 5:3f93dd1d4cb3 80 * - the only unsent segment is at least pcb->mss bytes long (or there is more
sam_grove 5:3f93dd1d4cb3 81 * than one unsent segment - with lwIP, this can happen although unsent->len < mss)
sam_grove 5:3f93dd1d4cb3 82 * - or if we are in fast-retransmit (TF_INFR)
sam_grove 5:3f93dd1d4cb3 83 */
sam_grove 5:3f93dd1d4cb3 84 #define tcp_do_output_nagle(tpcb) ((((tpcb)->unacked == NULL) || \
sam_grove 5:3f93dd1d4cb3 85 ((tpcb)->flags & (TF_NODELAY | TF_INFR)) || \
sam_grove 5:3f93dd1d4cb3 86 (((tpcb)->unsent != NULL) && (((tpcb)->unsent->next != NULL) || \
sam_grove 5:3f93dd1d4cb3 87 ((tpcb)->unsent->len >= (tpcb)->mss))) \
sam_grove 5:3f93dd1d4cb3 88 ) ? 1 : 0)
sam_grove 5:3f93dd1d4cb3 89 #define tcp_output_nagle(tpcb) (tcp_do_output_nagle(tpcb) ? tcp_output(tpcb) : ERR_OK)
sam_grove 5:3f93dd1d4cb3 90
sam_grove 5:3f93dd1d4cb3 91
sam_grove 5:3f93dd1d4cb3 92 #define TCP_SEQ_LT(a,b) ((s32_t)((a)-(b)) < 0)
sam_grove 5:3f93dd1d4cb3 93 #define TCP_SEQ_LEQ(a,b) ((s32_t)((a)-(b)) <= 0)
sam_grove 5:3f93dd1d4cb3 94 #define TCP_SEQ_GT(a,b) ((s32_t)((a)-(b)) > 0)
sam_grove 5:3f93dd1d4cb3 95 #define TCP_SEQ_GEQ(a,b) ((s32_t)((a)-(b)) >= 0)
sam_grove 5:3f93dd1d4cb3 96 /* is b<=a<=c? */
sam_grove 5:3f93dd1d4cb3 97 #if 0 /* see bug #10548 */
sam_grove 5:3f93dd1d4cb3 98 #define TCP_SEQ_BETWEEN(a,b,c) ((c)-(b) >= (a)-(b))
sam_grove 5:3f93dd1d4cb3 99 #endif
sam_grove 5:3f93dd1d4cb3 100 #define TCP_SEQ_BETWEEN(a,b,c) (TCP_SEQ_GEQ(a,b) && TCP_SEQ_LEQ(a,c))
sam_grove 5:3f93dd1d4cb3 101 #define TCP_FIN 0x01U
sam_grove 5:3f93dd1d4cb3 102 #define TCP_SYN 0x02U
sam_grove 5:3f93dd1d4cb3 103 #define TCP_RST 0x04U
sam_grove 5:3f93dd1d4cb3 104 #define TCP_PSH 0x08U
sam_grove 5:3f93dd1d4cb3 105 #define TCP_ACK 0x10U
sam_grove 5:3f93dd1d4cb3 106 #define TCP_URG 0x20U
sam_grove 5:3f93dd1d4cb3 107 #define TCP_ECE 0x40U
sam_grove 5:3f93dd1d4cb3 108 #define TCP_CWR 0x80U
sam_grove 5:3f93dd1d4cb3 109
sam_grove 5:3f93dd1d4cb3 110 #define TCP_FLAGS 0x3fU
sam_grove 5:3f93dd1d4cb3 111
sam_grove 5:3f93dd1d4cb3 112 /* Length of the TCP header, excluding options. */
sam_grove 5:3f93dd1d4cb3 113 #define TCP_HLEN 20
sam_grove 5:3f93dd1d4cb3 114
sam_grove 5:3f93dd1d4cb3 115 #ifndef TCP_TMR_INTERVAL
sam_grove 5:3f93dd1d4cb3 116 #define TCP_TMR_INTERVAL 250 /* The TCP timer interval in milliseconds. */
sam_grove 5:3f93dd1d4cb3 117 #endif /* TCP_TMR_INTERVAL */
sam_grove 5:3f93dd1d4cb3 118
sam_grove 5:3f93dd1d4cb3 119 #ifndef TCP_FAST_INTERVAL
sam_grove 5:3f93dd1d4cb3 120 #define TCP_FAST_INTERVAL TCP_TMR_INTERVAL /* the fine grained timeout in milliseconds */
sam_grove 5:3f93dd1d4cb3 121 #endif /* TCP_FAST_INTERVAL */
sam_grove 5:3f93dd1d4cb3 122
sam_grove 5:3f93dd1d4cb3 123 #ifndef TCP_SLOW_INTERVAL
sam_grove 5:3f93dd1d4cb3 124 #define TCP_SLOW_INTERVAL (2*TCP_TMR_INTERVAL) /* the coarse grained timeout in milliseconds */
sam_grove 5:3f93dd1d4cb3 125 #endif /* TCP_SLOW_INTERVAL */
sam_grove 5:3f93dd1d4cb3 126
sam_grove 5:3f93dd1d4cb3 127 #define TCP_FIN_WAIT_TIMEOUT 20000 /* milliseconds */
sam_grove 5:3f93dd1d4cb3 128 #define TCP_SYN_RCVD_TIMEOUT 20000 /* milliseconds */
sam_grove 5:3f93dd1d4cb3 129
sam_grove 5:3f93dd1d4cb3 130 #define TCP_OOSEQ_TIMEOUT 6U /* x RTO */
sam_grove 5:3f93dd1d4cb3 131
sam_grove 5:3f93dd1d4cb3 132 #ifndef TCP_MSL
sam_grove 5:3f93dd1d4cb3 133 #define TCP_MSL 60000UL /* The maximum segment lifetime in milliseconds */
sam_grove 5:3f93dd1d4cb3 134 #endif
sam_grove 5:3f93dd1d4cb3 135
sam_grove 5:3f93dd1d4cb3 136 /* Keepalive values, compliant with RFC 1122. Don't change this unless you know what you're doing */
sam_grove 5:3f93dd1d4cb3 137 #ifndef TCP_KEEPIDLE_DEFAULT
sam_grove 5:3f93dd1d4cb3 138 #define TCP_KEEPIDLE_DEFAULT 7200000UL /* Default KEEPALIVE timer in milliseconds */
sam_grove 5:3f93dd1d4cb3 139 #endif
sam_grove 5:3f93dd1d4cb3 140
sam_grove 5:3f93dd1d4cb3 141 #ifndef TCP_KEEPINTVL_DEFAULT
sam_grove 5:3f93dd1d4cb3 142 #define TCP_KEEPINTVL_DEFAULT 75000UL /* Default Time between KEEPALIVE probes in milliseconds */
sam_grove 5:3f93dd1d4cb3 143 #endif
sam_grove 5:3f93dd1d4cb3 144
sam_grove 5:3f93dd1d4cb3 145 #ifndef TCP_KEEPCNT_DEFAULT
sam_grove 5:3f93dd1d4cb3 146 #define TCP_KEEPCNT_DEFAULT 9U /* Default Counter for KEEPALIVE probes */
sam_grove 5:3f93dd1d4cb3 147 #endif
sam_grove 5:3f93dd1d4cb3 148
sam_grove 5:3f93dd1d4cb3 149 #define TCP_MAXIDLE TCP_KEEPCNT_DEFAULT * TCP_KEEPINTVL_DEFAULT /* Maximum KEEPALIVE probe time */
sam_grove 5:3f93dd1d4cb3 150
sam_grove 5:3f93dd1d4cb3 151 /* Fields are (of course) in network byte order.
sam_grove 5:3f93dd1d4cb3 152 * Some fields are converted to host byte order in tcp_input().
sam_grove 5:3f93dd1d4cb3 153 */
sam_grove 5:3f93dd1d4cb3 154 #ifdef PACK_STRUCT_USE_INCLUDES
sam_grove 5:3f93dd1d4cb3 155 # include "arch/bpstruct.h"
sam_grove 5:3f93dd1d4cb3 156 #endif
sam_grove 5:3f93dd1d4cb3 157 PACK_STRUCT_BEGIN
sam_grove 5:3f93dd1d4cb3 158 struct tcp_hdr {
sam_grove 5:3f93dd1d4cb3 159 PACK_STRUCT_FIELD(u16_t src);
sam_grove 5:3f93dd1d4cb3 160 PACK_STRUCT_FIELD(u16_t dest);
sam_grove 5:3f93dd1d4cb3 161 PACK_STRUCT_FIELD(u32_t seqno);
sam_grove 5:3f93dd1d4cb3 162 PACK_STRUCT_FIELD(u32_t ackno);
sam_grove 5:3f93dd1d4cb3 163 PACK_STRUCT_FIELD(u16_t _hdrlen_rsvd_flags);
sam_grove 5:3f93dd1d4cb3 164 PACK_STRUCT_FIELD(u16_t wnd);
sam_grove 5:3f93dd1d4cb3 165 PACK_STRUCT_FIELD(u16_t chksum);
sam_grove 5:3f93dd1d4cb3 166 PACK_STRUCT_FIELD(u16_t urgp);
sam_grove 5:3f93dd1d4cb3 167 } PACK_STRUCT_STRUCT;
sam_grove 5:3f93dd1d4cb3 168 PACK_STRUCT_END
sam_grove 5:3f93dd1d4cb3 169 #ifdef PACK_STRUCT_USE_INCLUDES
sam_grove 5:3f93dd1d4cb3 170 # include "arch/epstruct.h"
sam_grove 5:3f93dd1d4cb3 171 #endif
sam_grove 5:3f93dd1d4cb3 172
sam_grove 5:3f93dd1d4cb3 173 #define TCPH_OFFSET(phdr) (ntohs((phdr)->_hdrlen_rsvd_flags) >> 8)
sam_grove 5:3f93dd1d4cb3 174 #define TCPH_HDRLEN(phdr) (ntohs((phdr)->_hdrlen_rsvd_flags) >> 12)
sam_grove 5:3f93dd1d4cb3 175 #define TCPH_FLAGS(phdr) (ntohs((phdr)->_hdrlen_rsvd_flags) & TCP_FLAGS)
sam_grove 5:3f93dd1d4cb3 176
sam_grove 5:3f93dd1d4cb3 177 #define TCPH_OFFSET_SET(phdr, offset) (phdr)->_hdrlen_rsvd_flags = htons(((offset) << 8) | TCPH_FLAGS(phdr))
sam_grove 5:3f93dd1d4cb3 178 #define TCPH_HDRLEN_SET(phdr, len) (phdr)->_hdrlen_rsvd_flags = htons(((len) << 12) | TCPH_FLAGS(phdr))
sam_grove 5:3f93dd1d4cb3 179 #define TCPH_FLAGS_SET(phdr, flags) (phdr)->_hdrlen_rsvd_flags = (((phdr)->_hdrlen_rsvd_flags & PP_HTONS((u16_t)(~(u16_t)(TCP_FLAGS)))) | htons(flags))
sam_grove 5:3f93dd1d4cb3 180 #define TCPH_HDRLEN_FLAGS_SET(phdr, len, flags) (phdr)->_hdrlen_rsvd_flags = htons(((len) << 12) | (flags))
sam_grove 5:3f93dd1d4cb3 181
sam_grove 5:3f93dd1d4cb3 182 #define TCPH_SET_FLAG(phdr, flags ) (phdr)->_hdrlen_rsvd_flags = ((phdr)->_hdrlen_rsvd_flags | htons(flags))
sam_grove 5:3f93dd1d4cb3 183 #define TCPH_UNSET_FLAG(phdr, flags) (phdr)->_hdrlen_rsvd_flags = htons(ntohs((phdr)->_hdrlen_rsvd_flags) | (TCPH_FLAGS(phdr) & ~(flags)) )
sam_grove 5:3f93dd1d4cb3 184
sam_grove 5:3f93dd1d4cb3 185 #define TCP_TCPLEN(seg) ((seg)->len + ((TCPH_FLAGS((seg)->tcphdr) & (TCP_FIN | TCP_SYN)) != 0))
sam_grove 5:3f93dd1d4cb3 186
sam_grove 5:3f93dd1d4cb3 187 /** Flags used on input processing, not on pcb->flags
sam_grove 5:3f93dd1d4cb3 188 */
sam_grove 5:3f93dd1d4cb3 189 #define TF_RESET (u8_t)0x08U /* Connection was reset. */
sam_grove 5:3f93dd1d4cb3 190 #define TF_CLOSED (u8_t)0x10U /* Connection was sucessfully closed. */
sam_grove 5:3f93dd1d4cb3 191 #define TF_GOT_FIN (u8_t)0x20U /* Connection was closed by the remote end. */
sam_grove 5:3f93dd1d4cb3 192
sam_grove 5:3f93dd1d4cb3 193
sam_grove 5:3f93dd1d4cb3 194 #if LWIP_EVENT_API
sam_grove 5:3f93dd1d4cb3 195
sam_grove 5:3f93dd1d4cb3 196 #define TCP_EVENT_ACCEPT(pcb,err,ret) ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\
sam_grove 5:3f93dd1d4cb3 197 LWIP_EVENT_ACCEPT, NULL, 0, err)
sam_grove 5:3f93dd1d4cb3 198 #define TCP_EVENT_SENT(pcb,space,ret) ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\
sam_grove 5:3f93dd1d4cb3 199 LWIP_EVENT_SENT, NULL, space, ERR_OK)
sam_grove 5:3f93dd1d4cb3 200 #define TCP_EVENT_RECV(pcb,p,err,ret) ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\
sam_grove 5:3f93dd1d4cb3 201 LWIP_EVENT_RECV, (p), 0, (err))
sam_grove 5:3f93dd1d4cb3 202 #define TCP_EVENT_CLOSED(pcb,ret) ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\
sam_grove 5:3f93dd1d4cb3 203 LWIP_EVENT_RECV, NULL, 0, ERR_OK)
sam_grove 5:3f93dd1d4cb3 204 #define TCP_EVENT_CONNECTED(pcb,err,ret) ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\
sam_grove 5:3f93dd1d4cb3 205 LWIP_EVENT_CONNECTED, NULL, 0, (err))
sam_grove 5:3f93dd1d4cb3 206 #define TCP_EVENT_POLL(pcb,ret) ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\
sam_grove 5:3f93dd1d4cb3 207 LWIP_EVENT_POLL, NULL, 0, ERR_OK)
sam_grove 5:3f93dd1d4cb3 208 #define TCP_EVENT_ERR(errf,arg,err) lwip_tcp_event((arg), NULL, \
sam_grove 5:3f93dd1d4cb3 209 LWIP_EVENT_ERR, NULL, 0, (err))
sam_grove 5:3f93dd1d4cb3 210
sam_grove 5:3f93dd1d4cb3 211 #else /* LWIP_EVENT_API */
sam_grove 5:3f93dd1d4cb3 212
sam_grove 5:3f93dd1d4cb3 213 #define TCP_EVENT_ACCEPT(pcb,err,ret) \
sam_grove 5:3f93dd1d4cb3 214 do { \
sam_grove 5:3f93dd1d4cb3 215 if((pcb)->accept != NULL) \
sam_grove 5:3f93dd1d4cb3 216 (ret) = (pcb)->accept((pcb)->callback_arg,(pcb),(err)); \
sam_grove 5:3f93dd1d4cb3 217 else (ret) = ERR_ARG; \
sam_grove 5:3f93dd1d4cb3 218 } while (0)
sam_grove 5:3f93dd1d4cb3 219
sam_grove 5:3f93dd1d4cb3 220 #define TCP_EVENT_SENT(pcb,space,ret) \
sam_grove 5:3f93dd1d4cb3 221 do { \
sam_grove 5:3f93dd1d4cb3 222 if((pcb)->sent != NULL) \
sam_grove 5:3f93dd1d4cb3 223 (ret) = (pcb)->sent((pcb)->callback_arg,(pcb),(space)); \
sam_grove 5:3f93dd1d4cb3 224 else (ret) = ERR_OK; \
sam_grove 5:3f93dd1d4cb3 225 } while (0)
sam_grove 5:3f93dd1d4cb3 226
sam_grove 5:3f93dd1d4cb3 227 #define TCP_EVENT_RECV(pcb,p,err,ret) \
sam_grove 5:3f93dd1d4cb3 228 do { \
sam_grove 5:3f93dd1d4cb3 229 if((pcb)->recv != NULL) { \
sam_grove 5:3f93dd1d4cb3 230 (ret) = (pcb)->recv((pcb)->callback_arg,(pcb),(p),(err));\
sam_grove 5:3f93dd1d4cb3 231 } else { \
sam_grove 5:3f93dd1d4cb3 232 (ret) = tcp_recv_null(NULL, (pcb), (p), (err)); \
sam_grove 5:3f93dd1d4cb3 233 } \
sam_grove 5:3f93dd1d4cb3 234 } while (0)
sam_grove 5:3f93dd1d4cb3 235
sam_grove 5:3f93dd1d4cb3 236 #define TCP_EVENT_CLOSED(pcb,ret) \
sam_grove 5:3f93dd1d4cb3 237 do { \
sam_grove 5:3f93dd1d4cb3 238 if(((pcb)->recv != NULL)) { \
sam_grove 5:3f93dd1d4cb3 239 (ret) = (pcb)->recv((pcb)->callback_arg,(pcb),NULL,ERR_OK);\
sam_grove 5:3f93dd1d4cb3 240 } else { \
sam_grove 5:3f93dd1d4cb3 241 (ret) = ERR_OK; \
sam_grove 5:3f93dd1d4cb3 242 } \
sam_grove 5:3f93dd1d4cb3 243 } while (0)
sam_grove 5:3f93dd1d4cb3 244
sam_grove 5:3f93dd1d4cb3 245 #define TCP_EVENT_CONNECTED(pcb,err,ret) \
sam_grove 5:3f93dd1d4cb3 246 do { \
sam_grove 5:3f93dd1d4cb3 247 if((pcb)->connected != NULL) \
sam_grove 5:3f93dd1d4cb3 248 (ret) = (pcb)->connected((pcb)->callback_arg,(pcb),(err)); \
sam_grove 5:3f93dd1d4cb3 249 else (ret) = ERR_OK; \
sam_grove 5:3f93dd1d4cb3 250 } while (0)
sam_grove 5:3f93dd1d4cb3 251
sam_grove 5:3f93dd1d4cb3 252 #define TCP_EVENT_POLL(pcb,ret) \
sam_grove 5:3f93dd1d4cb3 253 do { \
sam_grove 5:3f93dd1d4cb3 254 if((pcb)->poll != NULL) \
sam_grove 5:3f93dd1d4cb3 255 (ret) = (pcb)->poll((pcb)->callback_arg,(pcb)); \
sam_grove 5:3f93dd1d4cb3 256 else (ret) = ERR_OK; \
sam_grove 5:3f93dd1d4cb3 257 } while (0)
sam_grove 5:3f93dd1d4cb3 258
sam_grove 5:3f93dd1d4cb3 259 #define TCP_EVENT_ERR(errf,arg,err) \
sam_grove 5:3f93dd1d4cb3 260 do { \
sam_grove 5:3f93dd1d4cb3 261 if((errf) != NULL) \
sam_grove 5:3f93dd1d4cb3 262 (errf)((arg),(err)); \
sam_grove 5:3f93dd1d4cb3 263 } while (0)
sam_grove 5:3f93dd1d4cb3 264
sam_grove 5:3f93dd1d4cb3 265 #endif /* LWIP_EVENT_API */
sam_grove 5:3f93dd1d4cb3 266
sam_grove 5:3f93dd1d4cb3 267 /** Enabled extra-check for TCP_OVERSIZE if LWIP_DEBUG is enabled */
sam_grove 5:3f93dd1d4cb3 268 #if TCP_OVERSIZE && defined(LWIP_DEBUG)
sam_grove 5:3f93dd1d4cb3 269 #define TCP_OVERSIZE_DBGCHECK 1
sam_grove 5:3f93dd1d4cb3 270 #else
sam_grove 5:3f93dd1d4cb3 271 #define TCP_OVERSIZE_DBGCHECK 0
sam_grove 5:3f93dd1d4cb3 272 #endif
sam_grove 5:3f93dd1d4cb3 273
sam_grove 5:3f93dd1d4cb3 274 /** Don't generate checksum on copy if CHECKSUM_GEN_TCP is disabled */
sam_grove 5:3f93dd1d4cb3 275 #define TCP_CHECKSUM_ON_COPY (LWIP_CHECKSUM_ON_COPY && CHECKSUM_GEN_TCP)
sam_grove 5:3f93dd1d4cb3 276
sam_grove 5:3f93dd1d4cb3 277 /* This structure represents a TCP segment on the unsent, unacked and ooseq queues */
sam_grove 5:3f93dd1d4cb3 278 struct tcp_seg {
sam_grove 5:3f93dd1d4cb3 279 struct tcp_seg *next; /* used when putting segements on a queue */
sam_grove 5:3f93dd1d4cb3 280 struct pbuf *p; /* buffer containing data + TCP header */
sam_grove 5:3f93dd1d4cb3 281 u16_t len; /* the TCP length of this segment */
sam_grove 5:3f93dd1d4cb3 282 #if TCP_OVERSIZE_DBGCHECK
sam_grove 5:3f93dd1d4cb3 283 u16_t oversize_left; /* Extra bytes available at the end of the last
sam_grove 5:3f93dd1d4cb3 284 pbuf in unsent (used for asserting vs.
sam_grove 5:3f93dd1d4cb3 285 tcp_pcb.unsent_oversized only) */
sam_grove 5:3f93dd1d4cb3 286 #endif /* TCP_OVERSIZE_DBGCHECK */
sam_grove 5:3f93dd1d4cb3 287 #if TCP_CHECKSUM_ON_COPY
sam_grove 5:3f93dd1d4cb3 288 u16_t chksum;
sam_grove 5:3f93dd1d4cb3 289 u8_t chksum_swapped;
sam_grove 5:3f93dd1d4cb3 290 #endif /* TCP_CHECKSUM_ON_COPY */
sam_grove 5:3f93dd1d4cb3 291 u8_t flags;
sam_grove 5:3f93dd1d4cb3 292 #define TF_SEG_OPTS_MSS (u8_t)0x01U /* Include MSS option. */
sam_grove 5:3f93dd1d4cb3 293 #define TF_SEG_OPTS_TS (u8_t)0x02U /* Include timestamp option. */
sam_grove 5:3f93dd1d4cb3 294 #define TF_SEG_DATA_CHECKSUMMED (u8_t)0x04U /* ALL data (not the header) is
sam_grove 5:3f93dd1d4cb3 295 checksummed into 'chksum' */
sam_grove 5:3f93dd1d4cb3 296 struct tcp_hdr *tcphdr; /* the TCP header */
sam_grove 5:3f93dd1d4cb3 297 };
sam_grove 5:3f93dd1d4cb3 298
sam_grove 5:3f93dd1d4cb3 299 #define LWIP_TCP_OPT_LENGTH(flags) \
sam_grove 5:3f93dd1d4cb3 300 (flags & TF_SEG_OPTS_MSS ? 4 : 0) + \
sam_grove 5:3f93dd1d4cb3 301 (flags & TF_SEG_OPTS_TS ? 12 : 0)
sam_grove 5:3f93dd1d4cb3 302
sam_grove 5:3f93dd1d4cb3 303 /** This returns a TCP header option for MSS in an u32_t */
sam_grove 5:3f93dd1d4cb3 304 #define TCP_BUILD_MSS_OPTION(x) (x) = PP_HTONL(((u32_t)2 << 24) | \
sam_grove 5:3f93dd1d4cb3 305 ((u32_t)4 << 16) | \
sam_grove 5:3f93dd1d4cb3 306 (((u32_t)TCP_MSS / 256) << 8) | \
sam_grove 5:3f93dd1d4cb3 307 (TCP_MSS & 255))
sam_grove 5:3f93dd1d4cb3 308
sam_grove 5:3f93dd1d4cb3 309 /* Global variables: */
sam_grove 5:3f93dd1d4cb3 310 extern struct tcp_pcb *tcp_input_pcb;
sam_grove 5:3f93dd1d4cb3 311 extern u32_t tcp_ticks;
sam_grove 5:3f93dd1d4cb3 312
sam_grove 5:3f93dd1d4cb3 313 /* The TCP PCB lists. */
sam_grove 5:3f93dd1d4cb3 314 union tcp_listen_pcbs_t { /* List of all TCP PCBs in LISTEN state. */
sam_grove 5:3f93dd1d4cb3 315 struct tcp_pcb_listen *listen_pcbs;
sam_grove 5:3f93dd1d4cb3 316 struct tcp_pcb *pcbs;
sam_grove 5:3f93dd1d4cb3 317 };
sam_grove 5:3f93dd1d4cb3 318 extern struct tcp_pcb *tcp_bound_pcbs;
sam_grove 5:3f93dd1d4cb3 319 extern union tcp_listen_pcbs_t tcp_listen_pcbs;
sam_grove 5:3f93dd1d4cb3 320 extern struct tcp_pcb *tcp_active_pcbs; /* List of all TCP PCBs that are in a
sam_grove 5:3f93dd1d4cb3 321 state in which they accept or send
sam_grove 5:3f93dd1d4cb3 322 data. */
sam_grove 5:3f93dd1d4cb3 323 extern struct tcp_pcb *tcp_tw_pcbs; /* List of all TCP PCBs in TIME-WAIT. */
sam_grove 5:3f93dd1d4cb3 324
sam_grove 5:3f93dd1d4cb3 325 extern struct tcp_pcb *tcp_tmp_pcb; /* Only used for temporary storage. */
sam_grove 5:3f93dd1d4cb3 326
sam_grove 5:3f93dd1d4cb3 327 /* Axioms about the above lists:
sam_grove 5:3f93dd1d4cb3 328 1) Every TCP PCB that is not CLOSED is in one of the lists.
sam_grove 5:3f93dd1d4cb3 329 2) A PCB is only in one of the lists.
sam_grove 5:3f93dd1d4cb3 330 3) All PCBs in the tcp_listen_pcbs list is in LISTEN state.
sam_grove 5:3f93dd1d4cb3 331 4) All PCBs in the tcp_tw_pcbs list is in TIME-WAIT state.
sam_grove 5:3f93dd1d4cb3 332 */
sam_grove 5:3f93dd1d4cb3 333 /* Define two macros, TCP_REG and TCP_RMV that registers a TCP PCB
sam_grove 5:3f93dd1d4cb3 334 with a PCB list or removes a PCB from a list, respectively. */
sam_grove 5:3f93dd1d4cb3 335 #ifndef TCP_DEBUG_PCB_LISTS
sam_grove 5:3f93dd1d4cb3 336 #define TCP_DEBUG_PCB_LISTS 0
sam_grove 5:3f93dd1d4cb3 337 #endif
sam_grove 5:3f93dd1d4cb3 338 #if TCP_DEBUG_PCB_LISTS
sam_grove 5:3f93dd1d4cb3 339 #define TCP_REG(pcbs, npcb) do {\
sam_grove 5:3f93dd1d4cb3 340 LWIP_DEBUGF(TCP_DEBUG, ("TCP_REG %p local port %d\n", (npcb), (npcb)->local_port)); \
sam_grove 5:3f93dd1d4cb3 341 for(tcp_tmp_pcb = *(pcbs); \
sam_grove 5:3f93dd1d4cb3 342 tcp_tmp_pcb != NULL; \
sam_grove 5:3f93dd1d4cb3 343 tcp_tmp_pcb = tcp_tmp_pcb->next) { \
sam_grove 5:3f93dd1d4cb3 344 LWIP_ASSERT("TCP_REG: already registered\n", tcp_tmp_pcb != (npcb)); \
sam_grove 5:3f93dd1d4cb3 345 } \
sam_grove 5:3f93dd1d4cb3 346 LWIP_ASSERT("TCP_REG: pcb->state != CLOSED", ((pcbs) == &tcp_bound_pcbs) || ((npcb)->state != CLOSED)); \
sam_grove 5:3f93dd1d4cb3 347 (npcb)->next = *(pcbs); \
sam_grove 5:3f93dd1d4cb3 348 LWIP_ASSERT("TCP_REG: npcb->next != npcb", (npcb)->next != (npcb)); \
sam_grove 5:3f93dd1d4cb3 349 *(pcbs) = (npcb); \
sam_grove 5:3f93dd1d4cb3 350 LWIP_ASSERT("TCP_RMV: tcp_pcbs sane", tcp_pcbs_sane()); \
sam_grove 5:3f93dd1d4cb3 351 tcp_timer_needed(); \
sam_grove 5:3f93dd1d4cb3 352 } while(0)
sam_grove 5:3f93dd1d4cb3 353 #define TCP_RMV(pcbs, npcb) do { \
sam_grove 5:3f93dd1d4cb3 354 LWIP_ASSERT("TCP_RMV: pcbs != NULL", *(pcbs) != NULL); \
sam_grove 5:3f93dd1d4cb3 355 LWIP_DEBUGF(TCP_DEBUG, ("TCP_RMV: removing %p from %p\n", (npcb), *(pcbs))); \
sam_grove 5:3f93dd1d4cb3 356 if(*(pcbs) == (npcb)) { \
sam_grove 5:3f93dd1d4cb3 357 *(pcbs) = (*pcbs)->next; \
sam_grove 5:3f93dd1d4cb3 358 } else for(tcp_tmp_pcb = *(pcbs); tcp_tmp_pcb != NULL; tcp_tmp_pcb = tcp_tmp_pcb->next) { \
sam_grove 5:3f93dd1d4cb3 359 if(tcp_tmp_pcb->next == (npcb)) { \
sam_grove 5:3f93dd1d4cb3 360 tcp_tmp_pcb->next = (npcb)->next; \
sam_grove 5:3f93dd1d4cb3 361 break; \
sam_grove 5:3f93dd1d4cb3 362 } \
sam_grove 5:3f93dd1d4cb3 363 } \
sam_grove 5:3f93dd1d4cb3 364 (npcb)->next = NULL; \
sam_grove 5:3f93dd1d4cb3 365 LWIP_ASSERT("TCP_RMV: tcp_pcbs sane", tcp_pcbs_sane()); \
sam_grove 5:3f93dd1d4cb3 366 LWIP_DEBUGF(TCP_DEBUG, ("TCP_RMV: removed %p from %p\n", (npcb), *(pcbs))); \
sam_grove 5:3f93dd1d4cb3 367 } while(0)
sam_grove 5:3f93dd1d4cb3 368
sam_grove 5:3f93dd1d4cb3 369 #else /* LWIP_DEBUG */
sam_grove 5:3f93dd1d4cb3 370
sam_grove 5:3f93dd1d4cb3 371 #define TCP_REG(pcbs, npcb) \
sam_grove 5:3f93dd1d4cb3 372 do { \
sam_grove 5:3f93dd1d4cb3 373 (npcb)->next = *pcbs; \
sam_grove 5:3f93dd1d4cb3 374 *(pcbs) = (npcb); \
sam_grove 5:3f93dd1d4cb3 375 tcp_timer_needed(); \
sam_grove 5:3f93dd1d4cb3 376 } while (0)
sam_grove 5:3f93dd1d4cb3 377
sam_grove 5:3f93dd1d4cb3 378 #define TCP_RMV(pcbs, npcb) \
sam_grove 5:3f93dd1d4cb3 379 do { \
sam_grove 5:3f93dd1d4cb3 380 if(*(pcbs) == (npcb)) { \
sam_grove 5:3f93dd1d4cb3 381 (*(pcbs)) = (*pcbs)->next; \
sam_grove 5:3f93dd1d4cb3 382 } \
sam_grove 5:3f93dd1d4cb3 383 else { \
sam_grove 5:3f93dd1d4cb3 384 for(tcp_tmp_pcb = *pcbs; \
sam_grove 5:3f93dd1d4cb3 385 tcp_tmp_pcb != NULL; \
sam_grove 5:3f93dd1d4cb3 386 tcp_tmp_pcb = tcp_tmp_pcb->next) { \
sam_grove 5:3f93dd1d4cb3 387 if(tcp_tmp_pcb->next == (npcb)) { \
sam_grove 5:3f93dd1d4cb3 388 tcp_tmp_pcb->next = (npcb)->next; \
sam_grove 5:3f93dd1d4cb3 389 break; \
sam_grove 5:3f93dd1d4cb3 390 } \
sam_grove 5:3f93dd1d4cb3 391 } \
sam_grove 5:3f93dd1d4cb3 392 } \
sam_grove 5:3f93dd1d4cb3 393 (npcb)->next = NULL; \
sam_grove 5:3f93dd1d4cb3 394 } while(0)
sam_grove 5:3f93dd1d4cb3 395
sam_grove 5:3f93dd1d4cb3 396 #endif /* LWIP_DEBUG */
sam_grove 5:3f93dd1d4cb3 397
sam_grove 5:3f93dd1d4cb3 398
sam_grove 5:3f93dd1d4cb3 399 /* Internal functions: */
sam_grove 5:3f93dd1d4cb3 400 struct tcp_pcb *tcp_pcb_copy(struct tcp_pcb *pcb);
sam_grove 5:3f93dd1d4cb3 401 void tcp_pcb_purge(struct tcp_pcb *pcb);
sam_grove 5:3f93dd1d4cb3 402 void tcp_pcb_remove(struct tcp_pcb **pcblist, struct tcp_pcb *pcb);
sam_grove 5:3f93dd1d4cb3 403
sam_grove 5:3f93dd1d4cb3 404 void tcp_segs_free(struct tcp_seg *seg);
sam_grove 5:3f93dd1d4cb3 405 void tcp_seg_free(struct tcp_seg *seg);
sam_grove 5:3f93dd1d4cb3 406 struct tcp_seg *tcp_seg_copy(struct tcp_seg *seg);
sam_grove 5:3f93dd1d4cb3 407
sam_grove 5:3f93dd1d4cb3 408 #define tcp_ack(pcb) \
sam_grove 5:3f93dd1d4cb3 409 do { \
sam_grove 5:3f93dd1d4cb3 410 if((pcb)->flags & TF_ACK_DELAY) { \
sam_grove 5:3f93dd1d4cb3 411 (pcb)->flags &= ~TF_ACK_DELAY; \
sam_grove 5:3f93dd1d4cb3 412 (pcb)->flags |= TF_ACK_NOW; \
sam_grove 5:3f93dd1d4cb3 413 } \
sam_grove 5:3f93dd1d4cb3 414 else { \
sam_grove 5:3f93dd1d4cb3 415 (pcb)->flags |= TF_ACK_DELAY; \
sam_grove 5:3f93dd1d4cb3 416 } \
sam_grove 5:3f93dd1d4cb3 417 } while (0)
sam_grove 5:3f93dd1d4cb3 418
sam_grove 5:3f93dd1d4cb3 419 #define tcp_ack_now(pcb) \
sam_grove 5:3f93dd1d4cb3 420 do { \
sam_grove 5:3f93dd1d4cb3 421 (pcb)->flags |= TF_ACK_NOW; \
sam_grove 5:3f93dd1d4cb3 422 } while (0)
sam_grove 5:3f93dd1d4cb3 423
sam_grove 5:3f93dd1d4cb3 424 err_t tcp_send_fin(struct tcp_pcb *pcb);
sam_grove 5:3f93dd1d4cb3 425 err_t tcp_enqueue_flags(struct tcp_pcb *pcb, u8_t flags);
sam_grove 5:3f93dd1d4cb3 426
sam_grove 5:3f93dd1d4cb3 427 void tcp_rexmit_seg(struct tcp_pcb *pcb, struct tcp_seg *seg);
sam_grove 5:3f93dd1d4cb3 428
sam_grove 5:3f93dd1d4cb3 429 void tcp_rst(u32_t seqno, u32_t ackno,
sam_grove 5:3f93dd1d4cb3 430 ip_addr_t *local_ip, ip_addr_t *remote_ip,
sam_grove 5:3f93dd1d4cb3 431 u16_t local_port, u16_t remote_port);
sam_grove 5:3f93dd1d4cb3 432
sam_grove 5:3f93dd1d4cb3 433 u32_t tcp_next_iss(void);
sam_grove 5:3f93dd1d4cb3 434
sam_grove 5:3f93dd1d4cb3 435 void tcp_keepalive(struct tcp_pcb *pcb);
sam_grove 5:3f93dd1d4cb3 436 void tcp_zero_window_probe(struct tcp_pcb *pcb);
sam_grove 5:3f93dd1d4cb3 437
sam_grove 5:3f93dd1d4cb3 438 #if TCP_CALCULATE_EFF_SEND_MSS
sam_grove 5:3f93dd1d4cb3 439 u16_t tcp_eff_send_mss(u16_t sendmss, ip_addr_t *addr);
sam_grove 5:3f93dd1d4cb3 440 #endif /* TCP_CALCULATE_EFF_SEND_MSS */
sam_grove 5:3f93dd1d4cb3 441
sam_grove 5:3f93dd1d4cb3 442 #if LWIP_CALLBACK_API
sam_grove 5:3f93dd1d4cb3 443 err_t tcp_recv_null(void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err);
sam_grove 5:3f93dd1d4cb3 444 #endif /* LWIP_CALLBACK_API */
sam_grove 5:3f93dd1d4cb3 445
sam_grove 5:3f93dd1d4cb3 446 #if TCP_DEBUG || TCP_INPUT_DEBUG || TCP_OUTPUT_DEBUG
sam_grove 5:3f93dd1d4cb3 447 void tcp_debug_print(struct tcp_hdr *tcphdr);
sam_grove 5:3f93dd1d4cb3 448 void tcp_debug_print_flags(u8_t flags);
sam_grove 5:3f93dd1d4cb3 449 void tcp_debug_print_state(enum tcp_state s);
sam_grove 5:3f93dd1d4cb3 450 void tcp_debug_print_pcbs(void);
sam_grove 5:3f93dd1d4cb3 451 s16_t tcp_pcbs_sane(void);
sam_grove 5:3f93dd1d4cb3 452 #else
sam_grove 5:3f93dd1d4cb3 453 # define tcp_debug_print(tcphdr)
sam_grove 5:3f93dd1d4cb3 454 # define tcp_debug_print_flags(flags)
sam_grove 5:3f93dd1d4cb3 455 # define tcp_debug_print_state(s)
sam_grove 5:3f93dd1d4cb3 456 # define tcp_debug_print_pcbs()
sam_grove 5:3f93dd1d4cb3 457 # define tcp_pcbs_sane() 1
sam_grove 5:3f93dd1d4cb3 458 #endif /* TCP_DEBUG */
sam_grove 5:3f93dd1d4cb3 459
sam_grove 5:3f93dd1d4cb3 460 /** External function (implemented in timers.c), called when TCP detects
sam_grove 5:3f93dd1d4cb3 461 * that a timer is needed (i.e. active- or time-wait-pcb found). */
sam_grove 5:3f93dd1d4cb3 462 void tcp_timer_needed(void);
sam_grove 5:3f93dd1d4cb3 463
sam_grove 5:3f93dd1d4cb3 464
sam_grove 5:3f93dd1d4cb3 465 #ifdef __cplusplus
sam_grove 5:3f93dd1d4cb3 466 }
sam_grove 5:3f93dd1d4cb3 467 #endif
sam_grove 5:3f93dd1d4cb3 468
sam_grove 5:3f93dd1d4cb3 469 #endif /* LWIP_TCP */
sam_grove 5:3f93dd1d4cb3 470
sam_grove 5:3f93dd1d4cb3 471 #endif /* __LWIP_TCP_H__ */