Pehr Hovey
Some quick code to use UDP-only (no TCP) with mBed. Echos received packets and sends packets when a button is pressed
Core/lwIP/include/lwip/tcp.h@0:a548a085de55, 2010-03-14 (annotated)
- Committer:
- pehrhovey
- Date:
- Sun Mar 14 00:54:12 2010 +0000
- Revision:
- 0:a548a085de55
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| pehrhovey | 0:a548a085de55 | 1 | /* |
| pehrhovey | 0:a548a085de55 | 2 | * Copyright (c) 2001-2004 Swedish Institute of Computer Science. |
| pehrhovey | 0:a548a085de55 | 3 | * All rights reserved. |
| pehrhovey | 0:a548a085de55 | 4 | * |
| pehrhovey | 0:a548a085de55 | 5 | * Redistribution and use in source and binary forms, with or without modification, |
| pehrhovey | 0:a548a085de55 | 6 | * are permitted provided that the following conditions are met: |
| pehrhovey | 0:a548a085de55 | 7 | * |
| pehrhovey | 0:a548a085de55 | 8 | * 1. Redistributions of source code must retain the above copyright notice, |
| pehrhovey | 0:a548a085de55 | 9 | * this list of conditions and the following disclaimer. |
| pehrhovey | 0:a548a085de55 | 10 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
| pehrhovey | 0:a548a085de55 | 11 | * this list of conditions and the following disclaimer in the documentation |
| pehrhovey | 0:a548a085de55 | 12 | * and/or other materials provided with the distribution. |
| pehrhovey | 0:a548a085de55 | 13 | * 3. The name of the author may not be used to endorse or promote products |
| pehrhovey | 0:a548a085de55 | 14 | * derived from this software without specific prior written permission. |
| pehrhovey | 0:a548a085de55 | 15 | * |
| pehrhovey | 0:a548a085de55 | 16 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| pehrhovey | 0:a548a085de55 | 17 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| pehrhovey | 0:a548a085de55 | 18 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT |
| pehrhovey | 0:a548a085de55 | 19 | * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| pehrhovey | 0:a548a085de55 | 20 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT |
| pehrhovey | 0:a548a085de55 | 21 | * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| pehrhovey | 0:a548a085de55 | 22 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| pehrhovey | 0:a548a085de55 | 23 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
| pehrhovey | 0:a548a085de55 | 24 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY |
| pehrhovey | 0:a548a085de55 | 25 | * OF SUCH DAMAGE. |
| pehrhovey | 0:a548a085de55 | 26 | * |
| pehrhovey | 0:a548a085de55 | 27 | * This file is part of the lwIP TCP/IP stack. |
| pehrhovey | 0:a548a085de55 | 28 | * |
| pehrhovey | 0:a548a085de55 | 29 | * Author: Adam Dunkels <adam@sics.se> |
| pehrhovey | 0:a548a085de55 | 30 | * |
| pehrhovey | 0:a548a085de55 | 31 | */ |
| pehrhovey | 0:a548a085de55 | 32 | #ifndef __LWIP_TCP_H__ |
| pehrhovey | 0:a548a085de55 | 33 | #define __LWIP_TCP_H__ |
| pehrhovey | 0:a548a085de55 | 34 | |
| pehrhovey | 0:a548a085de55 | 35 | #include "lwip/opt.h" |
| pehrhovey | 0:a548a085de55 | 36 | |
| pehrhovey | 0:a548a085de55 | 37 | #if LWIP_TCP /* don't build if not configured for use in lwipopts.h */ |
| pehrhovey | 0:a548a085de55 | 38 | |
| pehrhovey | 0:a548a085de55 | 39 | #include "lwip/sys.h" |
| pehrhovey | 0:a548a085de55 | 40 | #include "lwip/mem.h" |
| pehrhovey | 0:a548a085de55 | 41 | #include "lwip/pbuf.h" |
| pehrhovey | 0:a548a085de55 | 42 | #include "lwip/ip.h" |
| pehrhovey | 0:a548a085de55 | 43 | #include "lwip/icmp.h" |
| pehrhovey | 0:a548a085de55 | 44 | #include "lwip/err.h" |
| pehrhovey | 0:a548a085de55 | 45 | |
| pehrhovey | 0:a548a085de55 | 46 | #ifdef __cplusplus |
| pehrhovey | 0:a548a085de55 | 47 | extern "C" { |
| pehrhovey | 0:a548a085de55 | 48 | #endif |
| pehrhovey | 0:a548a085de55 | 49 | |
| pehrhovey | 0:a548a085de55 | 50 | struct tcp_pcb; |
| pehrhovey | 0:a548a085de55 | 51 | |
| pehrhovey | 0:a548a085de55 | 52 | /* Functions for interfacing with TCP: */ |
| pehrhovey | 0:a548a085de55 | 53 | |
| pehrhovey | 0:a548a085de55 | 54 | /* Lower layer interface to TCP: */ |
| pehrhovey | 0:a548a085de55 | 55 | #define tcp_init() /* Compatibility define, not init needed. */ |
| pehrhovey | 0:a548a085de55 | 56 | void tcp_tmr (void); /* Must be called every |
| pehrhovey | 0:a548a085de55 | 57 | TCP_TMR_INTERVAL |
| pehrhovey | 0:a548a085de55 | 58 | ms. (Typically 250 ms). */ |
| pehrhovey | 0:a548a085de55 | 59 | /* Application program's interface: */ |
| pehrhovey | 0:a548a085de55 | 60 | struct tcp_pcb * tcp_new (void); |
| pehrhovey | 0:a548a085de55 | 61 | struct tcp_pcb * tcp_alloc (u8_t prio); |
| pehrhovey | 0:a548a085de55 | 62 | |
| pehrhovey | 0:a548a085de55 | 63 | void tcp_arg (struct tcp_pcb *pcb, void *arg); |
| pehrhovey | 0:a548a085de55 | 64 | void tcp_accept (struct tcp_pcb *pcb, |
| pehrhovey | 0:a548a085de55 | 65 | err_t (* accept)(void *arg, struct tcp_pcb *newpcb, |
| pehrhovey | 0:a548a085de55 | 66 | err_t err)); |
| pehrhovey | 0:a548a085de55 | 67 | void tcp_recv (struct tcp_pcb *pcb, |
| pehrhovey | 0:a548a085de55 | 68 | err_t (* recv)(void *arg, struct tcp_pcb *tpcb, |
| pehrhovey | 0:a548a085de55 | 69 | struct pbuf *p, err_t err)); |
| pehrhovey | 0:a548a085de55 | 70 | void tcp_sent (struct tcp_pcb *pcb, |
| pehrhovey | 0:a548a085de55 | 71 | err_t (* sent)(void *arg, struct tcp_pcb *tpcb, |
| pehrhovey | 0:a548a085de55 | 72 | u16_t len)); |
| pehrhovey | 0:a548a085de55 | 73 | void tcp_poll (struct tcp_pcb *pcb, |
| pehrhovey | 0:a548a085de55 | 74 | err_t (* poll)(void *arg, struct tcp_pcb *tpcb), |
| pehrhovey | 0:a548a085de55 | 75 | u8_t interval); |
| pehrhovey | 0:a548a085de55 | 76 | void tcp_err (struct tcp_pcb *pcb, |
| pehrhovey | 0:a548a085de55 | 77 | void (* err)(void *arg, err_t err)); |
| pehrhovey | 0:a548a085de55 | 78 | |
| pehrhovey | 0:a548a085de55 | 79 | #define tcp_mss(pcb) ((pcb)->mss) |
| pehrhovey | 0:a548a085de55 | 80 | #define tcp_sndbuf(pcb) ((pcb)->snd_buf) |
| pehrhovey | 0:a548a085de55 | 81 | |
| pehrhovey | 0:a548a085de55 | 82 | #if TCP_LISTEN_BACKLOG |
| pehrhovey | 0:a548a085de55 | 83 | #define tcp_accepted(pcb) (((struct tcp_pcb_listen *)(pcb))->accepts_pending--) |
| pehrhovey | 0:a548a085de55 | 84 | #else /* TCP_LISTEN_BACKLOG */ |
| pehrhovey | 0:a548a085de55 | 85 | #define tcp_accepted(pcb) |
| pehrhovey | 0:a548a085de55 | 86 | #endif /* TCP_LISTEN_BACKLOG */ |
| pehrhovey | 0:a548a085de55 | 87 | |
| pehrhovey | 0:a548a085de55 | 88 | void tcp_recved (struct tcp_pcb *pcb, u16_t len); |
| pehrhovey | 0:a548a085de55 | 89 | err_t tcp_bind (struct tcp_pcb *pcb, struct ip_addr *ipaddr, |
| pehrhovey | 0:a548a085de55 | 90 | u16_t port); |
| pehrhovey | 0:a548a085de55 | 91 | err_t tcp_connect (struct tcp_pcb *pcb, struct ip_addr *ipaddr, |
| pehrhovey | 0:a548a085de55 | 92 | u16_t port, err_t (* connected)(void *arg, |
| pehrhovey | 0:a548a085de55 | 93 | struct tcp_pcb *tpcb, |
| pehrhovey | 0:a548a085de55 | 94 | err_t err)); |
| pehrhovey | 0:a548a085de55 | 95 | |
| pehrhovey | 0:a548a085de55 | 96 | struct tcp_pcb * tcp_listen_with_backlog(struct tcp_pcb *pcb, u8_t backlog); |
| pehrhovey | 0:a548a085de55 | 97 | #define tcp_listen(pcb) tcp_listen_with_backlog(pcb, TCP_DEFAULT_LISTEN_BACKLOG) |
| pehrhovey | 0:a548a085de55 | 98 | |
| pehrhovey | 0:a548a085de55 | 99 | void tcp_abandon (struct tcp_pcb *pcb, int reset); |
| pehrhovey | 0:a548a085de55 | 100 | #define tcp_abort(pcb) tcp_abandon((pcb), 1) |
| pehrhovey | 0:a548a085de55 | 101 | err_t tcp_close (struct tcp_pcb *pcb); |
| pehrhovey | 0:a548a085de55 | 102 | |
| pehrhovey | 0:a548a085de55 | 103 | /* Flags for "apiflags" parameter in tcp_write and tcp_enqueue */ |
| pehrhovey | 0:a548a085de55 | 104 | #define TCP_WRITE_FLAG_COPY 0x01 |
| pehrhovey | 0:a548a085de55 | 105 | #define TCP_WRITE_FLAG_MORE 0x02 |
| pehrhovey | 0:a548a085de55 | 106 | |
| pehrhovey | 0:a548a085de55 | 107 | err_t tcp_write (struct tcp_pcb *pcb, const void *dataptr, u16_t len, |
| pehrhovey | 0:a548a085de55 | 108 | u8_t apiflags); |
| pehrhovey | 0:a548a085de55 | 109 | |
| pehrhovey | 0:a548a085de55 | 110 | void tcp_setprio (struct tcp_pcb *pcb, u8_t prio); |
| pehrhovey | 0:a548a085de55 | 111 | |
| pehrhovey | 0:a548a085de55 | 112 | #define TCP_PRIO_MIN 1 |
| pehrhovey | 0:a548a085de55 | 113 | #define TCP_PRIO_NORMAL 64 |
| pehrhovey | 0:a548a085de55 | 114 | #define TCP_PRIO_MAX 127 |
| pehrhovey | 0:a548a085de55 | 115 | |
| pehrhovey | 0:a548a085de55 | 116 | /* It is also possible to call these two functions at the right |
| pehrhovey | 0:a548a085de55 | 117 | intervals (instead of calling tcp_tmr()). */ |
| pehrhovey | 0:a548a085de55 | 118 | void tcp_slowtmr (void); |
| pehrhovey | 0:a548a085de55 | 119 | void tcp_fasttmr (void); |
| pehrhovey | 0:a548a085de55 | 120 | |
| pehrhovey | 0:a548a085de55 | 121 | |
| pehrhovey | 0:a548a085de55 | 122 | /* Only used by IP to pass a TCP segment to TCP: */ |
| pehrhovey | 0:a548a085de55 | 123 | void tcp_input (struct pbuf *p, struct netif *inp); |
| pehrhovey | 0:a548a085de55 | 124 | /* Used within the TCP code only: */ |
| pehrhovey | 0:a548a085de55 | 125 | err_t tcp_output (struct tcp_pcb *pcb); |
| pehrhovey | 0:a548a085de55 | 126 | void tcp_rexmit (struct tcp_pcb *pcb); |
| pehrhovey | 0:a548a085de55 | 127 | void tcp_rexmit_rto (struct tcp_pcb *pcb); |
| pehrhovey | 0:a548a085de55 | 128 | void tcp_rexmit_fast (struct tcp_pcb *pcb); |
| pehrhovey | 0:a548a085de55 | 129 | u32_t tcp_update_rcv_ann_wnd(struct tcp_pcb *pcb); |
| pehrhovey | 0:a548a085de55 | 130 | |
| pehrhovey | 0:a548a085de55 | 131 | /** |
| pehrhovey | 0:a548a085de55 | 132 | * This is the Nagle algorithm: try to combine user data to send as few TCP |
| pehrhovey | 0:a548a085de55 | 133 | * segments as possible. Only send if |
| pehrhovey | 0:a548a085de55 | 134 | * - no previously transmitted data on the connection remains unacknowledged or |
| pehrhovey | 0:a548a085de55 | 135 | * - the TF_NODELAY flag is set (nagle algorithm turned off for this pcb) or |
| pehrhovey | 0:a548a085de55 | 136 | * - the only unsent segment is at least pcb->mss bytes long (or there is more |
| pehrhovey | 0:a548a085de55 | 137 | * than one unsent segment - with lwIP, this can happen although unsent->len < mss) |
| pehrhovey | 0:a548a085de55 | 138 | */ |
| pehrhovey | 0:a548a085de55 | 139 | #define tcp_do_output_nagle(tpcb) ((((tpcb)->unacked == NULL) || \ |
| pehrhovey | 0:a548a085de55 | 140 | ((tpcb)->flags & TF_NODELAY) || \ |
| pehrhovey | 0:a548a085de55 | 141 | (((tpcb)->unsent != NULL) && (((tpcb)->unsent->next != NULL) || \ |
| pehrhovey | 0:a548a085de55 | 142 | ((tpcb)->unsent->len >= (tpcb)->mss))) \ |
| pehrhovey | 0:a548a085de55 | 143 | ) ? 1 : 0) |
| pehrhovey | 0:a548a085de55 | 144 | #define tcp_output_nagle(tpcb) (tcp_do_output_nagle(tpcb) ? tcp_output(tpcb) : ERR_OK) |
| pehrhovey | 0:a548a085de55 | 145 | |
| pehrhovey | 0:a548a085de55 | 146 | |
| pehrhovey | 0:a548a085de55 | 147 | #define TCP_SEQ_LT(a,b) ((s32_t)((a)-(b)) < 0) |
| pehrhovey | 0:a548a085de55 | 148 | #define TCP_SEQ_LEQ(a,b) ((s32_t)((a)-(b)) <= 0) |
| pehrhovey | 0:a548a085de55 | 149 | #define TCP_SEQ_GT(a,b) ((s32_t)((a)-(b)) > 0) |
| pehrhovey | 0:a548a085de55 | 150 | #define TCP_SEQ_GEQ(a,b) ((s32_t)((a)-(b)) >= 0) |
| pehrhovey | 0:a548a085de55 | 151 | /* is b<=a<=c? */ |
| pehrhovey | 0:a548a085de55 | 152 | #if 0 /* see bug #10548 */ |
| pehrhovey | 0:a548a085de55 | 153 | #define TCP_SEQ_BETWEEN(a,b,c) ((c)-(b) >= (a)-(b)) |
| pehrhovey | 0:a548a085de55 | 154 | #endif |
| pehrhovey | 0:a548a085de55 | 155 | #define TCP_SEQ_BETWEEN(a,b,c) (TCP_SEQ_GEQ(a,b) && TCP_SEQ_LEQ(a,c)) |
| pehrhovey | 0:a548a085de55 | 156 | #define TCP_FIN 0x01U |
| pehrhovey | 0:a548a085de55 | 157 | #define TCP_SYN 0x02U |
| pehrhovey | 0:a548a085de55 | 158 | #define TCP_RST 0x04U |
| pehrhovey | 0:a548a085de55 | 159 | #define TCP_PSH 0x08U |
| pehrhovey | 0:a548a085de55 | 160 | #define TCP_ACK 0x10U |
| pehrhovey | 0:a548a085de55 | 161 | #define TCP_URG 0x20U |
| pehrhovey | 0:a548a085de55 | 162 | #define TCP_ECE 0x40U |
| pehrhovey | 0:a548a085de55 | 163 | #define TCP_CWR 0x80U |
| pehrhovey | 0:a548a085de55 | 164 | |
| pehrhovey | 0:a548a085de55 | 165 | #define TCP_FLAGS 0x3fU |
| pehrhovey | 0:a548a085de55 | 166 | |
| pehrhovey | 0:a548a085de55 | 167 | /* Length of the TCP header, excluding options. */ |
| pehrhovey | 0:a548a085de55 | 168 | #define TCP_HLEN 20 |
| pehrhovey | 0:a548a085de55 | 169 | |
| pehrhovey | 0:a548a085de55 | 170 | #ifndef TCP_TMR_INTERVAL |
| pehrhovey | 0:a548a085de55 | 171 | #define TCP_TMR_INTERVAL 250 /* The TCP timer interval in milliseconds. */ |
| pehrhovey | 0:a548a085de55 | 172 | #endif /* TCP_TMR_INTERVAL */ |
| pehrhovey | 0:a548a085de55 | 173 | |
| pehrhovey | 0:a548a085de55 | 174 | #ifndef TCP_FAST_INTERVAL |
| pehrhovey | 0:a548a085de55 | 175 | #define TCP_FAST_INTERVAL TCP_TMR_INTERVAL /* the fine grained timeout in milliseconds */ |
| pehrhovey | 0:a548a085de55 | 176 | #endif /* TCP_FAST_INTERVAL */ |
| pehrhovey | 0:a548a085de55 | 177 | |
| pehrhovey | 0:a548a085de55 | 178 | #ifndef TCP_SLOW_INTERVAL |
| pehrhovey | 0:a548a085de55 | 179 | #define TCP_SLOW_INTERVAL (2*TCP_TMR_INTERVAL) /* the coarse grained timeout in milliseconds */ |
| pehrhovey | 0:a548a085de55 | 180 | #endif /* TCP_SLOW_INTERVAL */ |
| pehrhovey | 0:a548a085de55 | 181 | |
| pehrhovey | 0:a548a085de55 | 182 | #define TCP_FIN_WAIT_TIMEOUT 20000 /* milliseconds */ |
| pehrhovey | 0:a548a085de55 | 183 | #define TCP_SYN_RCVD_TIMEOUT 20000 /* milliseconds */ |
| pehrhovey | 0:a548a085de55 | 184 | |
| pehrhovey | 0:a548a085de55 | 185 | #define TCP_OOSEQ_TIMEOUT 6U /* x RTO */ |
| pehrhovey | 0:a548a085de55 | 186 | |
| pehrhovey | 0:a548a085de55 | 187 | #ifndef TCP_MSL |
| pehrhovey | 0:a548a085de55 | 188 | #define TCP_MSL 60000UL /* The maximum segment lifetime in milliseconds */ |
| pehrhovey | 0:a548a085de55 | 189 | #endif |
| pehrhovey | 0:a548a085de55 | 190 | |
| pehrhovey | 0:a548a085de55 | 191 | /* Keepalive values, compliant with RFC 1122. Don't change this unless you know what you're doing */ |
| pehrhovey | 0:a548a085de55 | 192 | #ifndef TCP_KEEPIDLE_DEFAULT |
| pehrhovey | 0:a548a085de55 | 193 | #define TCP_KEEPIDLE_DEFAULT 7200000UL /* Default KEEPALIVE timer in milliseconds */ |
| pehrhovey | 0:a548a085de55 | 194 | #endif |
| pehrhovey | 0:a548a085de55 | 195 | |
| pehrhovey | 0:a548a085de55 | 196 | #ifndef TCP_KEEPINTVL_DEFAULT |
| pehrhovey | 0:a548a085de55 | 197 | #define TCP_KEEPINTVL_DEFAULT 75000UL /* Default Time between KEEPALIVE probes in milliseconds */ |
| pehrhovey | 0:a548a085de55 | 198 | #endif |
| pehrhovey | 0:a548a085de55 | 199 | |
| pehrhovey | 0:a548a085de55 | 200 | #ifndef TCP_KEEPCNT_DEFAULT |
| pehrhovey | 0:a548a085de55 | 201 | #define TCP_KEEPCNT_DEFAULT 9U /* Default Counter for KEEPALIVE probes */ |
| pehrhovey | 0:a548a085de55 | 202 | #endif |
| pehrhovey | 0:a548a085de55 | 203 | |
| pehrhovey | 0:a548a085de55 | 204 | #define TCP_MAXIDLE TCP_KEEPCNT_DEFAULT * TCP_KEEPINTVL_DEFAULT /* Maximum KEEPALIVE probe time */ |
| pehrhovey | 0:a548a085de55 | 205 | |
| pehrhovey | 0:a548a085de55 | 206 | /* Fields are (of course) in network byte order. |
| pehrhovey | 0:a548a085de55 | 207 | * Some fields are converted to host byte order in tcp_input(). |
| pehrhovey | 0:a548a085de55 | 208 | */ |
| pehrhovey | 0:a548a085de55 | 209 | #ifdef PACK_STRUCT_USE_INCLUDES |
| pehrhovey | 0:a548a085de55 | 210 | # include "arch/bpstruct.h" |
| pehrhovey | 0:a548a085de55 | 211 | #endif |
| pehrhovey | 0:a548a085de55 | 212 | PACK_STRUCT_BEGIN |
| pehrhovey | 0:a548a085de55 | 213 | struct tcp_hdr { |
| pehrhovey | 0:a548a085de55 | 214 | PACK_STRUCT_FIELD(u16_t src); |
| pehrhovey | 0:a548a085de55 | 215 | PACK_STRUCT_FIELD(u16_t dest); |
| pehrhovey | 0:a548a085de55 | 216 | PACK_STRUCT_FIELD(u32_t seqno); |
| pehrhovey | 0:a548a085de55 | 217 | PACK_STRUCT_FIELD(u32_t ackno); |
| pehrhovey | 0:a548a085de55 | 218 | PACK_STRUCT_FIELD(u16_t _hdrlen_rsvd_flags); |
| pehrhovey | 0:a548a085de55 | 219 | PACK_STRUCT_FIELD(u16_t wnd); |
| pehrhovey | 0:a548a085de55 | 220 | PACK_STRUCT_FIELD(u16_t chksum); |
| pehrhovey | 0:a548a085de55 | 221 | PACK_STRUCT_FIELD(u16_t urgp); |
| pehrhovey | 0:a548a085de55 | 222 | } PACK_STRUCT_STRUCT; |
| pehrhovey | 0:a548a085de55 | 223 | PACK_STRUCT_END |
| pehrhovey | 0:a548a085de55 | 224 | #ifdef PACK_STRUCT_USE_INCLUDES |
| pehrhovey | 0:a548a085de55 | 225 | # include "arch/epstruct.h" |
| pehrhovey | 0:a548a085de55 | 226 | #endif |
| pehrhovey | 0:a548a085de55 | 227 | |
| pehrhovey | 0:a548a085de55 | 228 | #define TCPH_OFFSET(phdr) (ntohs((phdr)->_hdrlen_rsvd_flags) >> 8) |
| pehrhovey | 0:a548a085de55 | 229 | #define TCPH_HDRLEN(phdr) (ntohs((phdr)->_hdrlen_rsvd_flags) >> 12) |
| pehrhovey | 0:a548a085de55 | 230 | #define TCPH_FLAGS(phdr) (ntohs((phdr)->_hdrlen_rsvd_flags) & TCP_FLAGS) |
| pehrhovey | 0:a548a085de55 | 231 | |
| pehrhovey | 0:a548a085de55 | 232 | #define TCPH_OFFSET_SET(phdr, offset) (phdr)->_hdrlen_rsvd_flags = htons(((offset) << 8) | TCPH_FLAGS(phdr)) |
| pehrhovey | 0:a548a085de55 | 233 | #define TCPH_HDRLEN_SET(phdr, len) (phdr)->_hdrlen_rsvd_flags = htons(((len) << 12) | TCPH_FLAGS(phdr)) |
| pehrhovey | 0:a548a085de55 | 234 | #define TCPH_FLAGS_SET(phdr, flags) (phdr)->_hdrlen_rsvd_flags = (((phdr)->_hdrlen_rsvd_flags & htons((u16_t)(~(u16_t)(TCP_FLAGS)))) | htons(flags)) |
| pehrhovey | 0:a548a085de55 | 235 | #define TCPH_SET_FLAG(phdr, flags ) (phdr)->_hdrlen_rsvd_flags = ((phdr)->_hdrlen_rsvd_flags | htons(flags)) |
| pehrhovey | 0:a548a085de55 | 236 | #define TCPH_UNSET_FLAG(phdr, flags) (phdr)->_hdrlen_rsvd_flags = htons(ntohs((phdr)->_hdrlen_rsvd_flags) | (TCPH_FLAGS(phdr) & ~(flags)) ) |
| pehrhovey | 0:a548a085de55 | 237 | |
| pehrhovey | 0:a548a085de55 | 238 | #define TCP_TCPLEN(seg) ((seg)->len + ((TCPH_FLAGS((seg)->tcphdr) & (TCP_FIN | TCP_SYN)) != 0)) |
| pehrhovey | 0:a548a085de55 | 239 | |
| pehrhovey | 0:a548a085de55 | 240 | enum tcp_state { |
| pehrhovey | 0:a548a085de55 | 241 | CLOSED = 0, |
| pehrhovey | 0:a548a085de55 | 242 | LISTEN = 1, |
| pehrhovey | 0:a548a085de55 | 243 | SYN_SENT = 2, |
| pehrhovey | 0:a548a085de55 | 244 | SYN_RCVD = 3, |
| pehrhovey | 0:a548a085de55 | 245 | ESTABLISHED = 4, |
| pehrhovey | 0:a548a085de55 | 246 | FIN_WAIT_1 = 5, |
| pehrhovey | 0:a548a085de55 | 247 | FIN_WAIT_2 = 6, |
| pehrhovey | 0:a548a085de55 | 248 | CLOSE_WAIT = 7, |
| pehrhovey | 0:a548a085de55 | 249 | CLOSING = 8, |
| pehrhovey | 0:a548a085de55 | 250 | LAST_ACK = 9, |
| pehrhovey | 0:a548a085de55 | 251 | TIME_WAIT = 10 |
| pehrhovey | 0:a548a085de55 | 252 | }; |
| pehrhovey | 0:a548a085de55 | 253 | |
| pehrhovey | 0:a548a085de55 | 254 | /** Flags used on input processing, not on pcb->flags |
| pehrhovey | 0:a548a085de55 | 255 | */ |
| pehrhovey | 0:a548a085de55 | 256 | #define TF_RESET (u8_t)0x08U /* Connection was reset. */ |
| pehrhovey | 0:a548a085de55 | 257 | #define TF_CLOSED (u8_t)0x10U /* Connection was sucessfully closed. */ |
| pehrhovey | 0:a548a085de55 | 258 | #define TF_GOT_FIN (u8_t)0x20U /* Connection was closed by the remote end. */ |
| pehrhovey | 0:a548a085de55 | 259 | |
| pehrhovey | 0:a548a085de55 | 260 | |
| pehrhovey | 0:a548a085de55 | 261 | #if LWIP_CALLBACK_API |
| pehrhovey | 0:a548a085de55 | 262 | /* Function to call when a listener has been connected. |
| pehrhovey | 0:a548a085de55 | 263 | * @param arg user-supplied argument (tcp_pcb.callback_arg) |
| pehrhovey | 0:a548a085de55 | 264 | * @param pcb a new tcp_pcb that now is connected |
| pehrhovey | 0:a548a085de55 | 265 | * @param err an error argument (TODO: that is current always ERR_OK?) |
| pehrhovey | 0:a548a085de55 | 266 | * @return ERR_OK: accept the new connection, |
| pehrhovey | 0:a548a085de55 | 267 | * any other err_t abortsthe new connection |
| pehrhovey | 0:a548a085de55 | 268 | */ |
| pehrhovey | 0:a548a085de55 | 269 | #define DEF_ACCEPT_CALLBACK err_t (* accept)(void *arg, struct tcp_pcb *newpcb, err_t err) |
| pehrhovey | 0:a548a085de55 | 270 | #else /* LWIP_CALLBACK_API */ |
| pehrhovey | 0:a548a085de55 | 271 | #define DEF_ACCEPT_CALLBACK |
| pehrhovey | 0:a548a085de55 | 272 | #endif /* LWIP_CALLBACK_API */ |
| pehrhovey | 0:a548a085de55 | 273 | |
| pehrhovey | 0:a548a085de55 | 274 | /** |
| pehrhovey | 0:a548a085de55 | 275 | * members common to struct tcp_pcb and struct tcp_listen_pcb |
| pehrhovey | 0:a548a085de55 | 276 | */ |
| pehrhovey | 0:a548a085de55 | 277 | #define TCP_PCB_COMMON(type) \ |
| pehrhovey | 0:a548a085de55 | 278 | type *next; /* for the linked list */ \ |
| pehrhovey | 0:a548a085de55 | 279 | enum tcp_state state; /* TCP state */ \ |
| pehrhovey | 0:a548a085de55 | 280 | u8_t prio; \ |
| pehrhovey | 0:a548a085de55 | 281 | void *callback_arg; \ |
| pehrhovey | 0:a548a085de55 | 282 | /* ports are in host byte order */ \ |
| pehrhovey | 0:a548a085de55 | 283 | u16_t local_port; \ |
| pehrhovey | 0:a548a085de55 | 284 | /* the accept callback for listen- and normal pcbs, if LWIP_CALLBACK_API */ \ |
| pehrhovey | 0:a548a085de55 | 285 | DEF_ACCEPT_CALLBACK |
| pehrhovey | 0:a548a085de55 | 286 | |
| pehrhovey | 0:a548a085de55 | 287 | |
| pehrhovey | 0:a548a085de55 | 288 | /* the TCP protocol control block */ |
| pehrhovey | 0:a548a085de55 | 289 | struct tcp_pcb { |
| pehrhovey | 0:a548a085de55 | 290 | /** common PCB members */ |
| pehrhovey | 0:a548a085de55 | 291 | IP_PCB; |
| pehrhovey | 0:a548a085de55 | 292 | /** protocol specific PCB members */ |
| pehrhovey | 0:a548a085de55 | 293 | TCP_PCB_COMMON(struct tcp_pcb); |
| pehrhovey | 0:a548a085de55 | 294 | |
| pehrhovey | 0:a548a085de55 | 295 | /* ports are in host byte order */ |
| pehrhovey | 0:a548a085de55 | 296 | u16_t remote_port; |
| pehrhovey | 0:a548a085de55 | 297 | |
| pehrhovey | 0:a548a085de55 | 298 | u8_t flags; |
| pehrhovey | 0:a548a085de55 | 299 | #define TF_ACK_DELAY ((u8_t)0x01U) /* Delayed ACK. */ |
| pehrhovey | 0:a548a085de55 | 300 | #define TF_ACK_NOW ((u8_t)0x02U) /* Immediate ACK. */ |
| pehrhovey | 0:a548a085de55 | 301 | #define TF_INFR ((u8_t)0x04U) /* In fast recovery. */ |
| pehrhovey | 0:a548a085de55 | 302 | #define TF_TIMESTAMP ((u8_t)0x08U) /* Timestamp option enabled */ |
| pehrhovey | 0:a548a085de55 | 303 | #define TF_FIN ((u8_t)0x20U) /* Connection was closed locally (FIN segment enqueued). */ |
| pehrhovey | 0:a548a085de55 | 304 | #define TF_NODELAY ((u8_t)0x40U) /* Disable Nagle algorithm */ |
| pehrhovey | 0:a548a085de55 | 305 | #define TF_NAGLEMEMERR ((u8_t)0x80U) /* nagle enabled, memerr, try to output to prevent delayed ACK to happen */ |
| pehrhovey | 0:a548a085de55 | 306 | |
| pehrhovey | 0:a548a085de55 | 307 | /* the rest of the fields are in host byte order |
| pehrhovey | 0:a548a085de55 | 308 | as we have to do some math with them */ |
| pehrhovey | 0:a548a085de55 | 309 | /* receiver variables */ |
| pehrhovey | 0:a548a085de55 | 310 | u32_t rcv_nxt; /* next seqno expected */ |
| pehrhovey | 0:a548a085de55 | 311 | u16_t rcv_wnd; /* receiver window available */ |
| pehrhovey | 0:a548a085de55 | 312 | u16_t rcv_ann_wnd; /* receiver window to announce */ |
| pehrhovey | 0:a548a085de55 | 313 | u32_t rcv_ann_right_edge; /* announced right edge of window */ |
| pehrhovey | 0:a548a085de55 | 314 | |
| pehrhovey | 0:a548a085de55 | 315 | /* Timers */ |
| pehrhovey | 0:a548a085de55 | 316 | u32_t tmr; |
| pehrhovey | 0:a548a085de55 | 317 | u8_t polltmr, pollinterval; |
| pehrhovey | 0:a548a085de55 | 318 | |
| pehrhovey | 0:a548a085de55 | 319 | /* Retransmission timer. */ |
| pehrhovey | 0:a548a085de55 | 320 | s16_t rtime; |
| pehrhovey | 0:a548a085de55 | 321 | |
| pehrhovey | 0:a548a085de55 | 322 | u16_t mss; /* maximum segment size */ |
| pehrhovey | 0:a548a085de55 | 323 | |
| pehrhovey | 0:a548a085de55 | 324 | /* RTT (round trip time) estimation variables */ |
| pehrhovey | 0:a548a085de55 | 325 | u32_t rttest; /* RTT estimate in 500ms ticks */ |
| pehrhovey | 0:a548a085de55 | 326 | u32_t rtseq; /* sequence number being timed */ |
| pehrhovey | 0:a548a085de55 | 327 | s16_t sa, sv; /* @todo document this */ |
| pehrhovey | 0:a548a085de55 | 328 | |
| pehrhovey | 0:a548a085de55 | 329 | s16_t rto; /* retransmission time-out */ |
| pehrhovey | 0:a548a085de55 | 330 | u8_t nrtx; /* number of retransmissions */ |
| pehrhovey | 0:a548a085de55 | 331 | |
| pehrhovey | 0:a548a085de55 | 332 | /* fast retransmit/recovery */ |
| pehrhovey | 0:a548a085de55 | 333 | u32_t lastack; /* Highest acknowledged seqno. */ |
| pehrhovey | 0:a548a085de55 | 334 | u8_t dupacks; |
| pehrhovey | 0:a548a085de55 | 335 | |
| pehrhovey | 0:a548a085de55 | 336 | /* congestion avoidance/control variables */ |
| pehrhovey | 0:a548a085de55 | 337 | u16_t cwnd; |
| pehrhovey | 0:a548a085de55 | 338 | u16_t ssthresh; |
| pehrhovey | 0:a548a085de55 | 339 | |
| pehrhovey | 0:a548a085de55 | 340 | /* sender variables */ |
| pehrhovey | 0:a548a085de55 | 341 | u32_t snd_nxt; /* next new seqno to be sent */ |
| pehrhovey | 0:a548a085de55 | 342 | u16_t snd_wnd; /* sender window */ |
| pehrhovey | 0:a548a085de55 | 343 | u32_t snd_wl1, snd_wl2; /* Sequence and acknowledgement numbers of last |
| pehrhovey | 0:a548a085de55 | 344 | window update. */ |
| pehrhovey | 0:a548a085de55 | 345 | u32_t snd_lbb; /* Sequence number of next byte to be buffered. */ |
| pehrhovey | 0:a548a085de55 | 346 | |
| pehrhovey | 0:a548a085de55 | 347 | u16_t acked; |
| pehrhovey | 0:a548a085de55 | 348 | |
| pehrhovey | 0:a548a085de55 | 349 | u16_t snd_buf; /* Available buffer space for sending (in bytes). */ |
| pehrhovey | 0:a548a085de55 | 350 | #define TCP_SNDQUEUELEN_OVERFLOW (0xffff-3) |
| pehrhovey | 0:a548a085de55 | 351 | u16_t snd_queuelen; /* Available buffer space for sending (in tcp_segs). */ |
| pehrhovey | 0:a548a085de55 | 352 | |
| pehrhovey | 0:a548a085de55 | 353 | |
| pehrhovey | 0:a548a085de55 | 354 | /* These are ordered by sequence number: */ |
| pehrhovey | 0:a548a085de55 | 355 | struct tcp_seg *unsent; /* Unsent (queued) segments. */ |
| pehrhovey | 0:a548a085de55 | 356 | struct tcp_seg *unacked; /* Sent but unacknowledged segments. */ |
| pehrhovey | 0:a548a085de55 | 357 | #if TCP_QUEUE_OOSEQ |
| pehrhovey | 0:a548a085de55 | 358 | struct tcp_seg *ooseq; /* Received out of sequence segments. */ |
| pehrhovey | 0:a548a085de55 | 359 | #endif /* TCP_QUEUE_OOSEQ */ |
| pehrhovey | 0:a548a085de55 | 360 | |
| pehrhovey | 0:a548a085de55 | 361 | struct pbuf *refused_data; /* Data previously received but not yet taken by upper layer */ |
| pehrhovey | 0:a548a085de55 | 362 | |
| pehrhovey | 0:a548a085de55 | 363 | #if LWIP_CALLBACK_API |
| pehrhovey | 0:a548a085de55 | 364 | /* Function to be called when more send buffer space is available. |
| pehrhovey | 0:a548a085de55 | 365 | * @param arg user-supplied argument (tcp_pcb.callback_arg) |
| pehrhovey | 0:a548a085de55 | 366 | * @param pcb the tcp_pcb which has send buffer space available |
| pehrhovey | 0:a548a085de55 | 367 | * @param space the amount of bytes available |
| pehrhovey | 0:a548a085de55 | 368 | * @return ERR_OK: try to send some data by calling tcp_output |
| pehrhovey | 0:a548a085de55 | 369 | */ |
| pehrhovey | 0:a548a085de55 | 370 | err_t (* sent)(void *arg, struct tcp_pcb *pcb, u16_t space); |
| pehrhovey | 0:a548a085de55 | 371 | |
| pehrhovey | 0:a548a085de55 | 372 | /* Function to be called when (in-sequence) data has arrived. |
| pehrhovey | 0:a548a085de55 | 373 | * @param arg user-supplied argument (tcp_pcb.callback_arg) |
| pehrhovey | 0:a548a085de55 | 374 | * @param pcb the tcp_pcb for which data has arrived |
| pehrhovey | 0:a548a085de55 | 375 | * @param p the packet buffer which arrived |
| pehrhovey | 0:a548a085de55 | 376 | * @param err an error argument (TODO: that is current always ERR_OK?) |
| pehrhovey | 0:a548a085de55 | 377 | * @return ERR_OK: try to send some data by calling tcp_output |
| pehrhovey | 0:a548a085de55 | 378 | */ |
| pehrhovey | 0:a548a085de55 | 379 | err_t (* recv)(void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err); |
| pehrhovey | 0:a548a085de55 | 380 | |
| pehrhovey | 0:a548a085de55 | 381 | /* Function to be called when a connection has been set up. |
| pehrhovey | 0:a548a085de55 | 382 | * @param arg user-supplied argument (tcp_pcb.callback_arg) |
| pehrhovey | 0:a548a085de55 | 383 | * @param pcb the tcp_pcb that now is connected |
| pehrhovey | 0:a548a085de55 | 384 | * @param err an error argument (TODO: that is current always ERR_OK?) |
| pehrhovey | 0:a548a085de55 | 385 | * @return value is currently ignored |
| pehrhovey | 0:a548a085de55 | 386 | */ |
| pehrhovey | 0:a548a085de55 | 387 | err_t (* connected)(void *arg, struct tcp_pcb *pcb, err_t err); |
| pehrhovey | 0:a548a085de55 | 388 | |
| pehrhovey | 0:a548a085de55 | 389 | /* Function which is called periodically. |
| pehrhovey | 0:a548a085de55 | 390 | * The period can be adjusted in multiples of the TCP slow timer interval |
| pehrhovey | 0:a548a085de55 | 391 | * by changing tcp_pcb.polltmr. |
| pehrhovey | 0:a548a085de55 | 392 | * @param arg user-supplied argument (tcp_pcb.callback_arg) |
| pehrhovey | 0:a548a085de55 | 393 | * @param pcb the tcp_pcb to poll for |
| pehrhovey | 0:a548a085de55 | 394 | * @return ERR_OK: try to send some data by calling tcp_output |
| pehrhovey | 0:a548a085de55 | 395 | */ |
| pehrhovey | 0:a548a085de55 | 396 | err_t (* poll)(void *arg, struct tcp_pcb *pcb); |
| pehrhovey | 0:a548a085de55 | 397 | |
| pehrhovey | 0:a548a085de55 | 398 | /* Function to be called whenever a fatal error occurs. |
| pehrhovey | 0:a548a085de55 | 399 | * There is no pcb parameter since most of the times, the pcb is |
| pehrhovey | 0:a548a085de55 | 400 | * already deallocated (or there is no pcb) when this function is called. |
| pehrhovey | 0:a548a085de55 | 401 | * @param arg user-supplied argument (tcp_pcb.callback_arg) |
| pehrhovey | 0:a548a085de55 | 402 | * @param err an indication why the error callback is called: |
| pehrhovey | 0:a548a085de55 | 403 | * ERR_ABRT: aborted through tcp_abort or by a TCP timer |
| pehrhovey | 0:a548a085de55 | 404 | * ERR_RST: the connection was reset by the remote host |
| pehrhovey | 0:a548a085de55 | 405 | */ |
| pehrhovey | 0:a548a085de55 | 406 | void (* errf)(void *arg, err_t err); |
| pehrhovey | 0:a548a085de55 | 407 | #endif /* LWIP_CALLBACK_API */ |
| pehrhovey | 0:a548a085de55 | 408 | |
| pehrhovey | 0:a548a085de55 | 409 | #if LWIP_TCP_TIMESTAMPS |
| pehrhovey | 0:a548a085de55 | 410 | u32_t ts_lastacksent; |
| pehrhovey | 0:a548a085de55 | 411 | u32_t ts_recent; |
| pehrhovey | 0:a548a085de55 | 412 | #endif /* LWIP_TCP_TIMESTAMPS */ |
| pehrhovey | 0:a548a085de55 | 413 | |
| pehrhovey | 0:a548a085de55 | 414 | /* idle time before KEEPALIVE is sent */ |
| pehrhovey | 0:a548a085de55 | 415 | u32_t keep_idle; |
| pehrhovey | 0:a548a085de55 | 416 | #if LWIP_TCP_KEEPALIVE |
| pehrhovey | 0:a548a085de55 | 417 | u32_t keep_intvl; |
| pehrhovey | 0:a548a085de55 | 418 | u32_t keep_cnt; |
| pehrhovey | 0:a548a085de55 | 419 | #endif /* LWIP_TCP_KEEPALIVE */ |
| pehrhovey | 0:a548a085de55 | 420 | |
| pehrhovey | 0:a548a085de55 | 421 | /* Persist timer counter */ |
| pehrhovey | 0:a548a085de55 | 422 | u32_t persist_cnt; |
| pehrhovey | 0:a548a085de55 | 423 | /* Persist timer back-off */ |
| pehrhovey | 0:a548a085de55 | 424 | u8_t persist_backoff; |
| pehrhovey | 0:a548a085de55 | 425 | |
| pehrhovey | 0:a548a085de55 | 426 | /* KEEPALIVE counter */ |
| pehrhovey | 0:a548a085de55 | 427 | u8_t keep_cnt_sent; |
| pehrhovey | 0:a548a085de55 | 428 | }; |
| pehrhovey | 0:a548a085de55 | 429 | |
| pehrhovey | 0:a548a085de55 | 430 | struct tcp_pcb_listen { |
| pehrhovey | 0:a548a085de55 | 431 | /* Common members of all PCB types */ |
| pehrhovey | 0:a548a085de55 | 432 | IP_PCB; |
| pehrhovey | 0:a548a085de55 | 433 | /* Protocol specific PCB members */ |
| pehrhovey | 0:a548a085de55 | 434 | TCP_PCB_COMMON(struct tcp_pcb_listen); |
| pehrhovey | 0:a548a085de55 | 435 | |
| pehrhovey | 0:a548a085de55 | 436 | #if TCP_LISTEN_BACKLOG |
| pehrhovey | 0:a548a085de55 | 437 | u8_t backlog; |
| pehrhovey | 0:a548a085de55 | 438 | u8_t accepts_pending; |
| pehrhovey | 0:a548a085de55 | 439 | #endif /* TCP_LISTEN_BACKLOG */ |
| pehrhovey | 0:a548a085de55 | 440 | }; |
| pehrhovey | 0:a548a085de55 | 441 | |
| pehrhovey | 0:a548a085de55 | 442 | #if LWIP_EVENT_API |
| pehrhovey | 0:a548a085de55 | 443 | |
| pehrhovey | 0:a548a085de55 | 444 | enum lwip_event { |
| pehrhovey | 0:a548a085de55 | 445 | LWIP_EVENT_ACCEPT, |
| pehrhovey | 0:a548a085de55 | 446 | LWIP_EVENT_SENT, |
| pehrhovey | 0:a548a085de55 | 447 | LWIP_EVENT_RECV, |
| pehrhovey | 0:a548a085de55 | 448 | LWIP_EVENT_CONNECTED, |
| pehrhovey | 0:a548a085de55 | 449 | LWIP_EVENT_POLL, |
| pehrhovey | 0:a548a085de55 | 450 | LWIP_EVENT_ERR |
| pehrhovey | 0:a548a085de55 | 451 | }; |
| pehrhovey | 0:a548a085de55 | 452 | |
| pehrhovey | 0:a548a085de55 | 453 | err_t lwip_tcp_event(void *arg, struct tcp_pcb *pcb, |
| pehrhovey | 0:a548a085de55 | 454 | enum lwip_event, |
| pehrhovey | 0:a548a085de55 | 455 | struct pbuf *p, |
| pehrhovey | 0:a548a085de55 | 456 | u16_t size, |
| pehrhovey | 0:a548a085de55 | 457 | err_t err); |
| pehrhovey | 0:a548a085de55 | 458 | |
| pehrhovey | 0:a548a085de55 | 459 | #define TCP_EVENT_ACCEPT(pcb,err,ret) ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\ |
| pehrhovey | 0:a548a085de55 | 460 | LWIP_EVENT_ACCEPT, NULL, 0, err) |
| pehrhovey | 0:a548a085de55 | 461 | #define TCP_EVENT_SENT(pcb,space,ret) ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\ |
| pehrhovey | 0:a548a085de55 | 462 | LWIP_EVENT_SENT, NULL, space, ERR_OK) |
| pehrhovey | 0:a548a085de55 | 463 | #define TCP_EVENT_RECV(pcb,p,err,ret) ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\ |
| pehrhovey | 0:a548a085de55 | 464 | LWIP_EVENT_RECV, (p), 0, (err)) |
| pehrhovey | 0:a548a085de55 | 465 | #define TCP_EVENT_CONNECTED(pcb,err,ret) ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\ |
| pehrhovey | 0:a548a085de55 | 466 | LWIP_EVENT_CONNECTED, NULL, 0, (err)) |
| pehrhovey | 0:a548a085de55 | 467 | #define TCP_EVENT_POLL(pcb,ret) ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\ |
| pehrhovey | 0:a548a085de55 | 468 | LWIP_EVENT_POLL, NULL, 0, ERR_OK) |
| pehrhovey | 0:a548a085de55 | 469 | #define TCP_EVENT_ERR(errf,arg,err) lwip_tcp_event((arg), NULL, \ |
| pehrhovey | 0:a548a085de55 | 470 | LWIP_EVENT_ERR, NULL, 0, (err)) |
| pehrhovey | 0:a548a085de55 | 471 | #else /* LWIP_EVENT_API */ |
| pehrhovey | 0:a548a085de55 | 472 | |
| pehrhovey | 0:a548a085de55 | 473 | #define TCP_EVENT_ACCEPT(pcb,err,ret) \ |
| pehrhovey | 0:a548a085de55 | 474 | do { \ |
| pehrhovey | 0:a548a085de55 | 475 | if((pcb)->accept != NULL) \ |
| pehrhovey | 0:a548a085de55 | 476 | (ret) = (pcb)->accept((pcb)->callback_arg,(pcb),(err)); \ |
| pehrhovey | 0:a548a085de55 | 477 | else (ret) = ERR_OK; \ |
| pehrhovey | 0:a548a085de55 | 478 | } while (0) |
| pehrhovey | 0:a548a085de55 | 479 | |
| pehrhovey | 0:a548a085de55 | 480 | #define TCP_EVENT_SENT(pcb,space,ret) \ |
| pehrhovey | 0:a548a085de55 | 481 | do { \ |
| pehrhovey | 0:a548a085de55 | 482 | if((pcb)->sent != NULL) \ |
| pehrhovey | 0:a548a085de55 | 483 | (ret) = (pcb)->sent((pcb)->callback_arg,(pcb),(space)); \ |
| pehrhovey | 0:a548a085de55 | 484 | else (ret) = ERR_OK; \ |
| pehrhovey | 0:a548a085de55 | 485 | } while (0) |
| pehrhovey | 0:a548a085de55 | 486 | |
| pehrhovey | 0:a548a085de55 | 487 | #define TCP_EVENT_RECV(pcb,p,err,ret) \ |
| pehrhovey | 0:a548a085de55 | 488 | do { \ |
| pehrhovey | 0:a548a085de55 | 489 | if((pcb)->recv != NULL) { \ |
| pehrhovey | 0:a548a085de55 | 490 | (ret) = (pcb)->recv((pcb)->callback_arg,(pcb),(p),(err)); \ |
| pehrhovey | 0:a548a085de55 | 491 | } else { \ |
| pehrhovey | 0:a548a085de55 | 492 | (ret) = ERR_OK; \ |
| pehrhovey | 0:a548a085de55 | 493 | if (p != NULL) { \ |
| pehrhovey | 0:a548a085de55 | 494 | tcp_recved((pcb), ((struct pbuf*)(p))->tot_len); \ |
| pehrhovey | 0:a548a085de55 | 495 | pbuf_free(p); \ |
| pehrhovey | 0:a548a085de55 | 496 | } \ |
| pehrhovey | 0:a548a085de55 | 497 | } \ |
| pehrhovey | 0:a548a085de55 | 498 | } while (0) |
| pehrhovey | 0:a548a085de55 | 499 | |
| pehrhovey | 0:a548a085de55 | 500 | #define TCP_EVENT_CONNECTED(pcb,err,ret) \ |
| pehrhovey | 0:a548a085de55 | 501 | do { \ |
| pehrhovey | 0:a548a085de55 | 502 | if((pcb)->connected != NULL) \ |
| pehrhovey | 0:a548a085de55 | 503 | (ret) = (pcb)->connected((pcb)->callback_arg,(pcb),(err)); \ |
| pehrhovey | 0:a548a085de55 | 504 | else (ret) = ERR_OK; \ |
| pehrhovey | 0:a548a085de55 | 505 | } while (0) |
| pehrhovey | 0:a548a085de55 | 506 | |
| pehrhovey | 0:a548a085de55 | 507 | #define TCP_EVENT_POLL(pcb,ret) \ |
| pehrhovey | 0:a548a085de55 | 508 | do { \ |
| pehrhovey | 0:a548a085de55 | 509 | if((pcb)->poll != NULL) \ |
| pehrhovey | 0:a548a085de55 | 510 | (ret) = (pcb)->poll((pcb)->callback_arg,(pcb)); \ |
| pehrhovey | 0:a548a085de55 | 511 | else (ret) = ERR_OK; \ |
| pehrhovey | 0:a548a085de55 | 512 | } while (0) |
| pehrhovey | 0:a548a085de55 | 513 | |
| pehrhovey | 0:a548a085de55 | 514 | #define TCP_EVENT_ERR(errf,arg,err) \ |
| pehrhovey | 0:a548a085de55 | 515 | do { \ |
| pehrhovey | 0:a548a085de55 | 516 | if((errf) != NULL) \ |
| pehrhovey | 0:a548a085de55 | 517 | (errf)((arg),(err)); \ |
| pehrhovey | 0:a548a085de55 | 518 | } while (0) |
| pehrhovey | 0:a548a085de55 | 519 | |
| pehrhovey | 0:a548a085de55 | 520 | #endif /* LWIP_EVENT_API */ |
| pehrhovey | 0:a548a085de55 | 521 | |
| pehrhovey | 0:a548a085de55 | 522 | /* This structure represents a TCP segment on the unsent and unacked queues */ |
| pehrhovey | 0:a548a085de55 | 523 | struct tcp_seg { |
| pehrhovey | 0:a548a085de55 | 524 | struct tcp_seg *next; /* used when putting segements on a queue */ |
| pehrhovey | 0:a548a085de55 | 525 | struct pbuf *p; /* buffer containing data + TCP header */ |
| pehrhovey | 0:a548a085de55 | 526 | void *dataptr; /* pointer to the TCP data in the pbuf */ |
| pehrhovey | 0:a548a085de55 | 527 | u16_t len; /* the TCP length of this segment */ |
| pehrhovey | 0:a548a085de55 | 528 | u8_t flags; |
| pehrhovey | 0:a548a085de55 | 529 | #define TF_SEG_OPTS_MSS (u8_t)0x01U /* Include MSS option. */ |
| pehrhovey | 0:a548a085de55 | 530 | #define TF_SEG_OPTS_TS (u8_t)0x02U /* Include timestamp option. */ |
| pehrhovey | 0:a548a085de55 | 531 | struct tcp_hdr *tcphdr; /* the TCP header */ |
| pehrhovey | 0:a548a085de55 | 532 | }; |
| pehrhovey | 0:a548a085de55 | 533 | |
| pehrhovey | 0:a548a085de55 | 534 | #define LWIP_TCP_OPT_LENGTH(flags) \ |
| pehrhovey | 0:a548a085de55 | 535 | (flags & TF_SEG_OPTS_MSS ? 4 : 0) + \ |
| pehrhovey | 0:a548a085de55 | 536 | (flags & TF_SEG_OPTS_TS ? 12 : 0) |
| pehrhovey | 0:a548a085de55 | 537 | |
| pehrhovey | 0:a548a085de55 | 538 | /** This returns a TCP header option for MSS in an u32_t */ |
| pehrhovey | 0:a548a085de55 | 539 | #define TCP_BUILD_MSS_OPTION(x) (x) = htonl(((u32_t)2 << 24) | \ |
| pehrhovey | 0:a548a085de55 | 540 | ((u32_t)4 << 16) | \ |
| pehrhovey | 0:a548a085de55 | 541 | (((u32_t)TCP_MSS / 256) << 8) | \ |
| pehrhovey | 0:a548a085de55 | 542 | (TCP_MSS & 255)) |
| pehrhovey | 0:a548a085de55 | 543 | |
| pehrhovey | 0:a548a085de55 | 544 | /* Internal functions and global variables: */ |
| pehrhovey | 0:a548a085de55 | 545 | struct tcp_pcb *tcp_pcb_copy(struct tcp_pcb *pcb); |
| pehrhovey | 0:a548a085de55 | 546 | void tcp_pcb_purge(struct tcp_pcb *pcb); |
| pehrhovey | 0:a548a085de55 | 547 | void tcp_pcb_remove(struct tcp_pcb **pcblist, struct tcp_pcb *pcb); |
| pehrhovey | 0:a548a085de55 | 548 | |
| pehrhovey | 0:a548a085de55 | 549 | u8_t tcp_segs_free(struct tcp_seg *seg); |
| pehrhovey | 0:a548a085de55 | 550 | u8_t tcp_seg_free(struct tcp_seg *seg); |
| pehrhovey | 0:a548a085de55 | 551 | struct tcp_seg *tcp_seg_copy(struct tcp_seg *seg); |
| pehrhovey | 0:a548a085de55 | 552 | |
| pehrhovey | 0:a548a085de55 | 553 | #define tcp_ack(pcb) \ |
| pehrhovey | 0:a548a085de55 | 554 | do { \ |
| pehrhovey | 0:a548a085de55 | 555 | if((pcb)->flags & TF_ACK_DELAY) { \ |
| pehrhovey | 0:a548a085de55 | 556 | (pcb)->flags &= ~TF_ACK_DELAY; \ |
| pehrhovey | 0:a548a085de55 | 557 | (pcb)->flags |= TF_ACK_NOW; \ |
| pehrhovey | 0:a548a085de55 | 558 | tcp_output(pcb); \ |
| pehrhovey | 0:a548a085de55 | 559 | } \ |
| pehrhovey | 0:a548a085de55 | 560 | else { \ |
| pehrhovey | 0:a548a085de55 | 561 | (pcb)->flags |= TF_ACK_DELAY; \ |
| pehrhovey | 0:a548a085de55 | 562 | } \ |
| pehrhovey | 0:a548a085de55 | 563 | } while (0) |
| pehrhovey | 0:a548a085de55 | 564 | |
| pehrhovey | 0:a548a085de55 | 565 | #define tcp_ack_now(pcb) \ |
| pehrhovey | 0:a548a085de55 | 566 | do { \ |
| pehrhovey | 0:a548a085de55 | 567 | (pcb)->flags |= TF_ACK_NOW; \ |
| pehrhovey | 0:a548a085de55 | 568 | tcp_output(pcb); \ |
| pehrhovey | 0:a548a085de55 | 569 | } while (0) |
| pehrhovey | 0:a548a085de55 | 570 | |
| pehrhovey | 0:a548a085de55 | 571 | err_t tcp_send_ctrl(struct tcp_pcb *pcb, u8_t flags); |
| pehrhovey | 0:a548a085de55 | 572 | err_t tcp_enqueue(struct tcp_pcb *pcb, void *dataptr, u16_t len, |
| pehrhovey | 0:a548a085de55 | 573 | u8_t flags, u8_t apiflags, u8_t optflags); |
| pehrhovey | 0:a548a085de55 | 574 | |
| pehrhovey | 0:a548a085de55 | 575 | void tcp_rexmit_seg(struct tcp_pcb *pcb, struct tcp_seg *seg); |
| pehrhovey | 0:a548a085de55 | 576 | |
| pehrhovey | 0:a548a085de55 | 577 | void tcp_rst(u32_t seqno, u32_t ackno, |
| pehrhovey | 0:a548a085de55 | 578 | struct ip_addr *local_ip, struct ip_addr *remote_ip, |
| pehrhovey | 0:a548a085de55 | 579 | u16_t local_port, u16_t remote_port); |
| pehrhovey | 0:a548a085de55 | 580 | |
| pehrhovey | 0:a548a085de55 | 581 | u32_t tcp_next_iss(void); |
| pehrhovey | 0:a548a085de55 | 582 | |
| pehrhovey | 0:a548a085de55 | 583 | void tcp_keepalive(struct tcp_pcb *pcb); |
| pehrhovey | 0:a548a085de55 | 584 | void tcp_zero_window_probe(struct tcp_pcb *pcb); |
| pehrhovey | 0:a548a085de55 | 585 | |
| pehrhovey | 0:a548a085de55 | 586 | #if TCP_CALCULATE_EFF_SEND_MSS |
| pehrhovey | 0:a548a085de55 | 587 | u16_t tcp_eff_send_mss(u16_t sendmss, struct ip_addr *addr); |
| pehrhovey | 0:a548a085de55 | 588 | #endif /* TCP_CALCULATE_EFF_SEND_MSS */ |
| pehrhovey | 0:a548a085de55 | 589 | |
| pehrhovey | 0:a548a085de55 | 590 | extern struct tcp_pcb *tcp_input_pcb; |
| pehrhovey | 0:a548a085de55 | 591 | extern u32_t tcp_ticks; |
| pehrhovey | 0:a548a085de55 | 592 | |
| pehrhovey | 0:a548a085de55 | 593 | const char* tcp_debug_state_str(enum tcp_state s); |
| pehrhovey | 0:a548a085de55 | 594 | #if TCP_DEBUG || TCP_INPUT_DEBUG || TCP_OUTPUT_DEBUG |
| pehrhovey | 0:a548a085de55 | 595 | void tcp_debug_print(struct tcp_hdr *tcphdr); |
| pehrhovey | 0:a548a085de55 | 596 | void tcp_debug_print_flags(u8_t flags); |
| pehrhovey | 0:a548a085de55 | 597 | void tcp_debug_print_state(enum tcp_state s); |
| pehrhovey | 0:a548a085de55 | 598 | void tcp_debug_print_pcbs(void); |
| pehrhovey | 0:a548a085de55 | 599 | s16_t tcp_pcbs_sane(void); |
| pehrhovey | 0:a548a085de55 | 600 | #else |
| pehrhovey | 0:a548a085de55 | 601 | # define tcp_debug_print(tcphdr) |
| pehrhovey | 0:a548a085de55 | 602 | # define tcp_debug_print_flags(flags) |
| pehrhovey | 0:a548a085de55 | 603 | # define tcp_debug_print_state(s) |
| pehrhovey | 0:a548a085de55 | 604 | # define tcp_debug_print_pcbs() |
| pehrhovey | 0:a548a085de55 | 605 | # define tcp_pcbs_sane() 1 |
| pehrhovey | 0:a548a085de55 | 606 | #endif /* TCP_DEBUG */ |
| pehrhovey | 0:a548a085de55 | 607 | |
| pehrhovey | 0:a548a085de55 | 608 | #if NO_SYS |
| pehrhovey | 0:a548a085de55 | 609 | #define tcp_timer_needed() |
| pehrhovey | 0:a548a085de55 | 610 | #else |
| pehrhovey | 0:a548a085de55 | 611 | void tcp_timer_needed(void); |
| pehrhovey | 0:a548a085de55 | 612 | #endif |
| pehrhovey | 0:a548a085de55 | 613 | |
| pehrhovey | 0:a548a085de55 | 614 | /* The TCP PCB lists. */ |
| pehrhovey | 0:a548a085de55 | 615 | union tcp_listen_pcbs_t { /* List of all TCP PCBs in LISTEN state. */ |
| pehrhovey | 0:a548a085de55 | 616 | struct tcp_pcb_listen *listen_pcbs; |
| pehrhovey | 0:a548a085de55 | 617 | struct tcp_pcb *pcbs; |
| pehrhovey | 0:a548a085de55 | 618 | }; |
| pehrhovey | 0:a548a085de55 | 619 | extern union tcp_listen_pcbs_t tcp_listen_pcbs; |
| pehrhovey | 0:a548a085de55 | 620 | extern struct tcp_pcb *tcp_active_pcbs; /* List of all TCP PCBs that are in a |
| pehrhovey | 0:a548a085de55 | 621 | state in which they accept or send |
| pehrhovey | 0:a548a085de55 | 622 | data. */ |
| pehrhovey | 0:a548a085de55 | 623 | extern struct tcp_pcb *tcp_tw_pcbs; /* List of all TCP PCBs in TIME-WAIT. */ |
| pehrhovey | 0:a548a085de55 | 624 | |
| pehrhovey | 0:a548a085de55 | 625 | extern struct tcp_pcb *tcp_tmp_pcb; /* Only used for temporary storage. */ |
| pehrhovey | 0:a548a085de55 | 626 | |
| pehrhovey | 0:a548a085de55 | 627 | /* Axioms about the above lists: |
| pehrhovey | 0:a548a085de55 | 628 | 1) Every TCP PCB that is not CLOSED is in one of the lists. |
| pehrhovey | 0:a548a085de55 | 629 | 2) A PCB is only in one of the lists. |
| pehrhovey | 0:a548a085de55 | 630 | 3) All PCBs in the tcp_listen_pcbs list is in LISTEN state. |
| pehrhovey | 0:a548a085de55 | 631 | 4) All PCBs in the tcp_tw_pcbs list is in TIME-WAIT state. |
| pehrhovey | 0:a548a085de55 | 632 | */ |
| pehrhovey | 0:a548a085de55 | 633 | |
| pehrhovey | 0:a548a085de55 | 634 | /* Define two macros, TCP_REG and TCP_RMV that registers a TCP PCB |
| pehrhovey | 0:a548a085de55 | 635 | with a PCB list or removes a PCB from a list, respectively. */ |
| pehrhovey | 0:a548a085de55 | 636 | #if 0 |
| pehrhovey | 0:a548a085de55 | 637 | #define TCP_REG(pcbs, npcb) do {\ |
| pehrhovey | 0:a548a085de55 | 638 | LWIP_DEBUGF(TCP_DEBUG, ("TCP_REG %p local port %d\n", npcb, npcb->local_port)); \ |
| pehrhovey | 0:a548a085de55 | 639 | for(tcp_tmp_pcb = *pcbs; \ |
| pehrhovey | 0:a548a085de55 | 640 | tcp_tmp_pcb != NULL; \ |
| pehrhovey | 0:a548a085de55 | 641 | tcp_tmp_pcb = tcp_tmp_pcb->next) { \ |
| pehrhovey | 0:a548a085de55 | 642 | LWIP_ASSERT("TCP_REG: already registered\n", tcp_tmp_pcb != npcb); \ |
| pehrhovey | 0:a548a085de55 | 643 | } \ |
| pehrhovey | 0:a548a085de55 | 644 | LWIP_ASSERT("TCP_REG: pcb->state != CLOSED", npcb->state != CLOSED); \ |
| pehrhovey | 0:a548a085de55 | 645 | npcb->next = *pcbs; \ |
| pehrhovey | 0:a548a085de55 | 646 | LWIP_ASSERT("TCP_REG: npcb->next != npcb", npcb->next != npcb); \ |
| pehrhovey | 0:a548a085de55 | 647 | *(pcbs) = npcb; \ |
| pehrhovey | 0:a548a085de55 | 648 | LWIP_ASSERT("TCP_RMV: tcp_pcbs sane", tcp_pcbs_sane()); \ |
| pehrhovey | 0:a548a085de55 | 649 | tcp_timer_needed(); \ |
| pehrhovey | 0:a548a085de55 | 650 | } while(0) |
| pehrhovey | 0:a548a085de55 | 651 | #define TCP_RMV(pcbs, npcb) do { \ |
| pehrhovey | 0:a548a085de55 | 652 | LWIP_ASSERT("TCP_RMV: pcbs != NULL", *pcbs != NULL); \ |
| pehrhovey | 0:a548a085de55 | 653 | LWIP_DEBUGF(TCP_DEBUG, ("TCP_RMV: removing %p from %p\n", npcb, *pcbs)); \ |
| pehrhovey | 0:a548a085de55 | 654 | if(*pcbs == npcb) { \ |
| pehrhovey | 0:a548a085de55 | 655 | *pcbs = (*pcbs)->next; \ |
| pehrhovey | 0:a548a085de55 | 656 | } else for(tcp_tmp_pcb = *pcbs; tcp_tmp_pcb != NULL; tcp_tmp_pcb = tcp_tmp_pcb->next) { \ |
| pehrhovey | 0:a548a085de55 | 657 | if(tcp_tmp_pcb->next == npcb) { \ |
| pehrhovey | 0:a548a085de55 | 658 | tcp_tmp_pcb->next = npcb->next; \ |
| pehrhovey | 0:a548a085de55 | 659 | break; \ |
| pehrhovey | 0:a548a085de55 | 660 | } \ |
| pehrhovey | 0:a548a085de55 | 661 | } \ |
| pehrhovey | 0:a548a085de55 | 662 | npcb->next = NULL; \ |
| pehrhovey | 0:a548a085de55 | 663 | LWIP_ASSERT("TCP_RMV: tcp_pcbs sane", tcp_pcbs_sane()); \ |
| pehrhovey | 0:a548a085de55 | 664 | LWIP_DEBUGF(TCP_DEBUG, ("TCP_RMV: removed %p from %p\n", npcb, *pcbs)); \ |
| pehrhovey | 0:a548a085de55 | 665 | } while(0) |
| pehrhovey | 0:a548a085de55 | 666 | |
| pehrhovey | 0:a548a085de55 | 667 | #else /* LWIP_DEBUG */ |
| pehrhovey | 0:a548a085de55 | 668 | |
| pehrhovey | 0:a548a085de55 | 669 | #define TCP_REG(pcbs, npcb) \ |
| pehrhovey | 0:a548a085de55 | 670 | do { \ |
| pehrhovey | 0:a548a085de55 | 671 | npcb->next = *pcbs; \ |
| pehrhovey | 0:a548a085de55 | 672 | *(pcbs) = npcb; \ |
| pehrhovey | 0:a548a085de55 | 673 | tcp_timer_needed(); \ |
| pehrhovey | 0:a548a085de55 | 674 | } while (0) |
| pehrhovey | 0:a548a085de55 | 675 | |
| pehrhovey | 0:a548a085de55 | 676 | #define TCP_RMV(pcbs, npcb) \ |
| pehrhovey | 0:a548a085de55 | 677 | do { \ |
| pehrhovey | 0:a548a085de55 | 678 | if(*(pcbs) == npcb) { \ |
| pehrhovey | 0:a548a085de55 | 679 | (*(pcbs)) = (*pcbs)->next; \ |
| pehrhovey | 0:a548a085de55 | 680 | } \ |
| pehrhovey | 0:a548a085de55 | 681 | else { \ |
| pehrhovey | 0:a548a085de55 | 682 | for(tcp_tmp_pcb = *pcbs; \ |
| pehrhovey | 0:a548a085de55 | 683 | tcp_tmp_pcb != NULL; \ |
| pehrhovey | 0:a548a085de55 | 684 | tcp_tmp_pcb = tcp_tmp_pcb->next) { \ |
| pehrhovey | 0:a548a085de55 | 685 | if(tcp_tmp_pcb->next == npcb) { \ |
| pehrhovey | 0:a548a085de55 | 686 | tcp_tmp_pcb->next = npcb->next; \ |
| pehrhovey | 0:a548a085de55 | 687 | break; \ |
| pehrhovey | 0:a548a085de55 | 688 | } \ |
| pehrhovey | 0:a548a085de55 | 689 | } \ |
| pehrhovey | 0:a548a085de55 | 690 | } \ |
| pehrhovey | 0:a548a085de55 | 691 | npcb->next = NULL; \ |
| pehrhovey | 0:a548a085de55 | 692 | } while(0) |
| pehrhovey | 0:a548a085de55 | 693 | |
| pehrhovey | 0:a548a085de55 | 694 | #endif /* LWIP_DEBUG */ |
| pehrhovey | 0:a548a085de55 | 695 | |
| pehrhovey | 0:a548a085de55 | 696 | #ifdef __cplusplus |
| pehrhovey | 0:a548a085de55 | 697 | } |
| pehrhovey | 0:a548a085de55 | 698 | #endif |
| pehrhovey | 0:a548a085de55 | 699 | |
| pehrhovey | 0:a548a085de55 | 700 | #endif /* LWIP_TCP */ |
| pehrhovey | 0:a548a085de55 | 701 | |
| pehrhovey | 0:a548a085de55 | 702 | #endif /* __LWIP_TCP_H__ */ |