adamdunkels | a2f3c42 | 2004-09-12 20:24:53 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2004, Swedish Institute of Computer Science. |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * 1. Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in the |
| 12 | * documentation and/or other materials provided with the distribution. |
| 13 | * 3. Neither the name of the Institute nor the names of its contributors |
| 14 | * may be used to endorse or promote products derived from this software |
| 15 | * without specific prior written permission. |
| 16 | * |
| 17 | * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND |
| 18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE |
| 21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 27 | * SUCH DAMAGE. |
| 28 | * |
| 29 | * This file is part of the Contiki operating system. |
| 30 | * |
| 31 | * Author: Adam Dunkels <adam@sics.se> |
| 32 | * |
adamdunkels | d0791bb | 2005-02-22 22:23:07 +0000 | [diff] [blame] | 33 | * $Id: psock.c,v 1.1 2005/02/22 22:23:07 adamdunkels Exp $ |
adamdunkels | a2f3c42 | 2004-09-12 20:24:53 +0000 | [diff] [blame] | 34 | */ |
| 35 | |
adamdunkels | d0791bb | 2005-02-22 22:23:07 +0000 | [diff] [blame] | 36 | #include "psock.h" |
adamdunkels | 039c3e0 | 2004-08-11 21:20:36 +0000 | [diff] [blame] | 37 | |
adamdunkels | d0791bb | 2005-02-22 22:23:07 +0000 | [diff] [blame] | 38 | #define PSOCK_STATE_NONE 0 |
| 39 | #define PSOCK_STATE_ACKED 1 |
| 40 | #define PSOCK_STATE_READ 2 |
| 41 | #define PSOCK_STATE_BLOCKED_NEWDATA 3 |
| 42 | #define PSOCK_STATE_BLOCKED_CLOSE 4 |
| 43 | #define PSOCK_STATE_BLOCKED_SEND 5 |
| 44 | #define PSOCK_STATE_DATA_SENT 6 |
adamdunkels | c8e7c77 | 2004-08-14 21:57:36 +0000 | [diff] [blame] | 45 | |
adamdunkels | e0b4547 | 2004-08-20 21:17:41 +0000 | [diff] [blame] | 46 | /*---------------------------------------------------------------------------*/ |
| 47 | static char |
adamdunkels | d0791bb | 2005-02-22 22:23:07 +0000 | [diff] [blame] | 48 | send_data(register struct psock *s) |
adamdunkels | e0b4547 | 2004-08-20 21:17:41 +0000 | [diff] [blame] | 49 | { |
adamdunkels | d0791bb | 2005-02-22 22:23:07 +0000 | [diff] [blame] | 50 | if(s->state != PSOCK_STATE_DATA_SENT || uip_rexmit()) { |
adamdunkels | e0b4547 | 2004-08-20 21:17:41 +0000 | [diff] [blame] | 51 | if(s->sendlen > uip_mss()) { |
| 52 | uip_send(s->sendptr, uip_mss()); |
adamdunkels | 039c3e0 | 2004-08-11 21:20:36 +0000 | [diff] [blame] | 53 | } else { |
adamdunkels | e0b4547 | 2004-08-20 21:17:41 +0000 | [diff] [blame] | 54 | uip_send(s->sendptr, s->sendlen); |
adamdunkels | 039c3e0 | 2004-08-11 21:20:36 +0000 | [diff] [blame] | 55 | } |
adamdunkels | d0791bb | 2005-02-22 22:23:07 +0000 | [diff] [blame] | 56 | s->state = PSOCK_STATE_DATA_SENT; |
adamdunkels | e0b4547 | 2004-08-20 21:17:41 +0000 | [diff] [blame] | 57 | return 1; |
adamdunkels | 039c3e0 | 2004-08-11 21:20:36 +0000 | [diff] [blame] | 58 | } |
adamdunkels | e0b4547 | 2004-08-20 21:17:41 +0000 | [diff] [blame] | 59 | return 0; |
adamdunkels | 039c3e0 | 2004-08-11 21:20:36 +0000 | [diff] [blame] | 60 | } |
| 61 | /*---------------------------------------------------------------------------*/ |
adamdunkels | e0b4547 | 2004-08-20 21:17:41 +0000 | [diff] [blame] | 62 | static char |
adamdunkels | d0791bb | 2005-02-22 22:23:07 +0000 | [diff] [blame] | 63 | data_sent(register struct psock *s) |
adamdunkels | e0b4547 | 2004-08-20 21:17:41 +0000 | [diff] [blame] | 64 | { |
adamdunkels | d0791bb | 2005-02-22 22:23:07 +0000 | [diff] [blame] | 65 | if(s->state == PSOCK_STATE_DATA_SENT && uip_acked()) { |
adamdunkels | e0b4547 | 2004-08-20 21:17:41 +0000 | [diff] [blame] | 66 | if(s->sendlen > uip_mss()) { |
| 67 | s->sendlen -= uip_mss(); |
| 68 | s->sendptr += uip_mss(); |
| 69 | } else { |
| 70 | s->sendptr += s->sendlen; |
| 71 | s->sendlen = 0; |
| 72 | } |
adamdunkels | d0791bb | 2005-02-22 22:23:07 +0000 | [diff] [blame] | 73 | s->state = PSOCK_STATE_ACKED; |
adamdunkels | e0b4547 | 2004-08-20 21:17:41 +0000 | [diff] [blame] | 74 | return 1; |
| 75 | } |
| 76 | return 0; |
| 77 | } |
| 78 | /*---------------------------------------------------------------------------*/ |
adamdunkels | d0791bb | 2005-02-22 22:23:07 +0000 | [diff] [blame] | 79 | PT_THREAD(psock_send(register struct psock *s, const char *buf, unsigned int len)) |
adamdunkels | e0b4547 | 2004-08-20 21:17:41 +0000 | [diff] [blame] | 80 | { |
adamdunkels | d0791bb | 2005-02-22 22:23:07 +0000 | [diff] [blame] | 81 | PT_BEGIN(&s->psockpt); |
adamdunkels | e0b4547 | 2004-08-20 21:17:41 +0000 | [diff] [blame] | 82 | |
| 83 | if(len == 0) { |
adamdunkels | d0791bb | 2005-02-22 22:23:07 +0000 | [diff] [blame] | 84 | PT_EXIT(&s->psockpt); |
adamdunkels | e0b4547 | 2004-08-20 21:17:41 +0000 | [diff] [blame] | 85 | } |
| 86 | |
| 87 | s->sendptr = buf; |
| 88 | s->sendlen = len; |
adamdunkels | bdafa39 | 2004-09-01 19:09:49 +0000 | [diff] [blame] | 89 | |
adamdunkels | d0791bb | 2005-02-22 22:23:07 +0000 | [diff] [blame] | 90 | s->state = PSOCK_STATE_NONE; |
adamdunkels | e0b4547 | 2004-08-20 21:17:41 +0000 | [diff] [blame] | 91 | |
| 92 | while(s->sendlen > 0) { |
adamdunkels | d0791bb | 2005-02-22 22:23:07 +0000 | [diff] [blame] | 93 | PT_WAIT_UNTIL(&s->psockpt, data_sent(s) & send_data(s)); |
adamdunkels | e0b4547 | 2004-08-20 21:17:41 +0000 | [diff] [blame] | 94 | } |
| 95 | |
adamdunkels | d0791bb | 2005-02-22 22:23:07 +0000 | [diff] [blame] | 96 | s->state = PSOCK_STATE_NONE; |
adamdunkels | bdafa39 | 2004-09-01 19:09:49 +0000 | [diff] [blame] | 97 | |
adamdunkels | d0791bb | 2005-02-22 22:23:07 +0000 | [diff] [blame] | 98 | PT_END(&s->psockpt); |
adamdunkels | e0b4547 | 2004-08-20 21:17:41 +0000 | [diff] [blame] | 99 | } |
| 100 | /*---------------------------------------------------------------------------*/ |
adamdunkels | d0791bb | 2005-02-22 22:23:07 +0000 | [diff] [blame] | 101 | PT_THREAD(psock_generator_send(register struct psock *s, |
adamdunkels | bae0a30 | 2004-09-12 07:16:23 +0000 | [diff] [blame] | 102 | unsigned short (*generate)(void *), void *arg)) |
| 103 | { |
adamdunkels | d0791bb | 2005-02-22 22:23:07 +0000 | [diff] [blame] | 104 | PT_BEGIN(&s->psockpt); |
adamdunkels | bae0a30 | 2004-09-12 07:16:23 +0000 | [diff] [blame] | 105 | |
| 106 | if(generate == NULL) { |
adamdunkels | d0791bb | 2005-02-22 22:23:07 +0000 | [diff] [blame] | 107 | PT_EXIT(&s->psockpt); |
adamdunkels | bae0a30 | 2004-09-12 07:16:23 +0000 | [diff] [blame] | 108 | } |
| 109 | |
adamdunkels | d0791bb | 2005-02-22 22:23:07 +0000 | [diff] [blame] | 110 | s->state = PSOCK_STATE_NONE; |
adamdunkels | bae0a30 | 2004-09-12 07:16:23 +0000 | [diff] [blame] | 111 | s->sendlen = generate(arg); |
| 112 | s->sendptr = uip_appdata; |
| 113 | do { |
| 114 | |
| 115 | if(uip_rexmit()) { |
| 116 | generate(arg); |
| 117 | } |
adamdunkels | d0791bb | 2005-02-22 22:23:07 +0000 | [diff] [blame] | 118 | PT_WAIT_UNTIL(&s->psockpt, data_sent(s) & send_data(s)); |
adamdunkels | bae0a30 | 2004-09-12 07:16:23 +0000 | [diff] [blame] | 119 | } while(s->sendlen > 0); |
| 120 | |
adamdunkels | d0791bb | 2005-02-22 22:23:07 +0000 | [diff] [blame] | 121 | s->state = PSOCK_STATE_NONE; |
adamdunkels | bae0a30 | 2004-09-12 07:16:23 +0000 | [diff] [blame] | 122 | |
adamdunkels | d0791bb | 2005-02-22 22:23:07 +0000 | [diff] [blame] | 123 | PT_END(&s->psockpt); |
adamdunkels | bae0a30 | 2004-09-12 07:16:23 +0000 | [diff] [blame] | 124 | } |
| 125 | /*---------------------------------------------------------------------------*/ |
adamdunkels | bdafa39 | 2004-09-01 19:09:49 +0000 | [diff] [blame] | 126 | char |
adamdunkels | d0791bb | 2005-02-22 22:23:07 +0000 | [diff] [blame] | 127 | psock_newdata(struct psock *s) |
adamdunkels | 039c3e0 | 2004-08-11 21:20:36 +0000 | [diff] [blame] | 128 | { |
adamdunkels | bdafa39 | 2004-09-01 19:09:49 +0000 | [diff] [blame] | 129 | if(s->readlen > 0) { |
| 130 | /* Data in uip_appdata buffer that has not yet been read. */ |
| 131 | return 1; |
adamdunkels | d0791bb | 2005-02-22 22:23:07 +0000 | [diff] [blame] | 132 | } else if(s->state == PSOCK_STATE_READ) { |
adamdunkels | e0b4547 | 2004-08-20 21:17:41 +0000 | [diff] [blame] | 133 | /* Data in uip_appdata buffer already consumed. */ |
adamdunkels | d0791bb | 2005-02-22 22:23:07 +0000 | [diff] [blame] | 134 | s->state = PSOCK_STATE_BLOCKED_NEWDATA; |
adamdunkels | e0b4547 | 2004-08-20 21:17:41 +0000 | [diff] [blame] | 135 | return 0; |
| 136 | } else if(uip_newdata()) { |
| 137 | /* There is new data that has not been consumed. */ |
| 138 | return 1; |
| 139 | } else { |
| 140 | /* There is no new data. */ |
| 141 | return 0; |
adamdunkels | c8e7c77 | 2004-08-14 21:57:36 +0000 | [diff] [blame] | 142 | } |
adamdunkels | c8e7c77 | 2004-08-14 21:57:36 +0000 | [diff] [blame] | 143 | } |
| 144 | /*---------------------------------------------------------------------------*/ |
adamdunkels | d0791bb | 2005-02-22 22:23:07 +0000 | [diff] [blame] | 145 | PT_THREAD(psock_readto(register struct psock *psock, unsigned char c)) |
adamdunkels | c8e7c77 | 2004-08-14 21:57:36 +0000 | [diff] [blame] | 146 | { |
adamdunkels | d0791bb | 2005-02-22 22:23:07 +0000 | [diff] [blame] | 147 | PT_BEGIN(&psock->psockpt); |
adamdunkels | e0b4547 | 2004-08-20 21:17:41 +0000 | [diff] [blame] | 148 | |
adamdunkels | d0791bb | 2005-02-22 22:23:07 +0000 | [diff] [blame] | 149 | uipbuf_setup(&psock->buf, psock->bufptr, psock->bufsize); |
adamdunkels | c8e7c77 | 2004-08-14 21:57:36 +0000 | [diff] [blame] | 150 | |
adamdunkels | e0b4547 | 2004-08-20 21:17:41 +0000 | [diff] [blame] | 151 | /* XXX: Should add uipbuf_checkmarker() before do{} loop, if |
| 152 | incoming data has been handled while waiting for a write. */ |
| 153 | |
adamdunkels | c8e7c77 | 2004-08-14 21:57:36 +0000 | [diff] [blame] | 154 | do { |
adamdunkels | d0791bb | 2005-02-22 22:23:07 +0000 | [diff] [blame] | 155 | if(psock->readlen == 0) { |
| 156 | PT_WAIT_UNTIL(&psock->psockpt, psock_newdata(psock)); |
| 157 | psock->state = PSOCK_STATE_READ; |
| 158 | psock->readptr = (u8_t *)uip_appdata; |
| 159 | psock->readlen = uip_datalen(); |
adamdunkels | c8e7c77 | 2004-08-14 21:57:36 +0000 | [diff] [blame] | 160 | } |
adamdunkels | d0791bb | 2005-02-22 22:23:07 +0000 | [diff] [blame] | 161 | } while((uipbuf_bufto(&psock->buf, c, |
| 162 | &psock->readptr, |
| 163 | &psock->readlen) & UIPBUF_FOUND) == 0); |
adamdunkels | c8e7c77 | 2004-08-14 21:57:36 +0000 | [diff] [blame] | 164 | |
adamdunkels | d0791bb | 2005-02-22 22:23:07 +0000 | [diff] [blame] | 165 | if(uipbuf_len(&psock->buf) == 0) { |
| 166 | psock->state = PSOCK_STATE_NONE; |
| 167 | PT_RESTART(&psock->psockpt); |
adamdunkels | bae0a30 | 2004-09-12 07:16:23 +0000 | [diff] [blame] | 168 | } |
adamdunkels | d0791bb | 2005-02-22 22:23:07 +0000 | [diff] [blame] | 169 | PT_END(&psock->psockpt); |
adamdunkels | 039c3e0 | 2004-08-11 21:20:36 +0000 | [diff] [blame] | 170 | } |
| 171 | /*---------------------------------------------------------------------------*/ |
| 172 | void |
adamdunkels | d0791bb | 2005-02-22 22:23:07 +0000 | [diff] [blame] | 173 | psock_init(register struct psock *psock, char *buffer, unsigned int buffersize) |
adamdunkels | 039c3e0 | 2004-08-11 21:20:36 +0000 | [diff] [blame] | 174 | { |
adamdunkels | d0791bb | 2005-02-22 22:23:07 +0000 | [diff] [blame] | 175 | psock->state = PSOCK_STATE_NONE; |
| 176 | psock->readlen = 0; |
| 177 | psock->bufptr = buffer; |
| 178 | psock->bufsize = buffersize; |
| 179 | uipbuf_setup(&psock->buf, buffer, buffersize); |
| 180 | PT_INIT(&psock->pt); |
| 181 | PT_INIT(&psock->psockpt); |
adamdunkels | 039c3e0 | 2004-08-11 21:20:36 +0000 | [diff] [blame] | 182 | } |
| 183 | /*---------------------------------------------------------------------------*/ |