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annotate packages/redboot/current/src/net/tcp.c @ 1444:d9e058a49f03

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TCP SYN fix - from Jani Monoses
author gthomas
date Fri, 12 Dec 2003 19:14:03 +0000
parents 13ba50dd5a8e
children 077fd39935a2
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1 //==========================================================================
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2 //
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3 // net/tcp.c
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4 //
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5 // Stand-alone TCP networking support for RedBoot
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6 //
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7 //==========================================================================
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8 //####ECOSGPLCOPYRIGHTBEGIN####
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9 // -------------------------------------------
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10 // This file is part of eCos, the Embedded Configurable Operating System.
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11 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
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12 //
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13 // eCos is free software; you can redistribute it and/or modify it under
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14 // the terms of the GNU General Public License as published by the Free
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15 // Software Foundation; either version 2 or (at your option) any later version.
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16 //
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17 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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18 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
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19 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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20 // for more details.
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21 //
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22 // You should have received a copy of the GNU General Public License along
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23 // with eCos; if not, write to the Free Software Foundation, Inc.,
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24 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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25 //
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26 // As a special exception, if other files instantiate templates or use macros
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27 // or inline functions from this file, or you compile this file and link it
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28 // with other works to produce a work based on this file, this file does not
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29 // by itself cause the resulting work to be covered by the GNU General Public
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30 // License. However the source code for this file must still be made available
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31 // in accordance with section (3) of the GNU General Public License.
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32 //
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33 // This exception does not invalidate any other reasons why a work based on
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34 // this file might be covered by the GNU General Public License.
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35 //
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36 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
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37 // at http://sources.redhat.com/ecos/ecos-license/
208
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38 // -------------------------------------------
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39 //####ECOSGPLCOPYRIGHTEND####
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40 //==========================================================================
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41 //#####DESCRIPTIONBEGIN####
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42 //
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43 // Author(s): gthomas
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44 // Contributors: gthomas
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45 // Date: 2000-07-14
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46 // Purpose:
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47 // Description:
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48 //
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49 // This code is part of RedBoot (tm).
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50 //
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51 //####DESCRIPTIONEND####
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52 //
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53 //==========================================================================
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54
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55 #include <net/net.h>
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56 #include <cyg/infra/diag.h>
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57
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58 #define MAX_TCP_SEGMENT (ETH_MAX_PKTLEN - (sizeof(eth_header_t) + sizeof(ip_header_t)))
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59 #define MAX_TCP_DATA (MAX_TCP_SEGMENT - sizeof(tcp_header_t))
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60
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61
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62 /* sequence number comparison macros */
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63 #define SEQ_LT(a,b) ((int)((a)-(b)) < 0)
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64 #define SEQ_LE(a,b) ((int)((a)-(b)) <= 0)
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65 #define SEQ_GT(a,b) ((int)((a)-(b)) > 0)
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66 #define SEQ_GE(a,b) ((int)((a)-(b)) >= 0)
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67
242
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68 /* Set a timer which will send an RST and abort a connection. */
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69 static timer_t abort_timer;
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70
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71 static void do_retrans(void *p);
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72 static void do_close(void *p);
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73
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74 #ifdef BSP_LOG
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75 static char *
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76 flags_to_str(octet f)
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77 {
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78 static char str[7], *p;
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79
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80 p = str;
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81
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82 if (f & TCP_FLAG_FIN)
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83 *p++ = 'F';
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84 if (f & TCP_FLAG_SYN)
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85 *p++ = 'S';
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86 if (f & TCP_FLAG_RST)
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87 *p++ = 'R';
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88 if (f & TCP_FLAG_PSH)
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89 *p++ = 'P';
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90 if (f & TCP_FLAG_ACK)
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91 *p++ = 'A';
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92 if (f & TCP_FLAG_URG)
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93 *p++ = 'U';
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94 *p = '\0';
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95 return str;
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96 }
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97 #endif
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98
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99 /*
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100 * A major assumption is that only a very small number of sockets will
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101 * active, so a simple linear search of those sockets is acceptible.
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102 */
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103 static tcp_socket_t *tcp_list;
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104
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105 /*
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106 * Format and send an outgoing segment.
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107 */
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108 static void
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109 tcp_send(tcp_socket_t *s, int flags, int resend)
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110 {
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111 tcp_header_t *tcp;
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112 ip_header_t *ip;
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113 pktbuf_t *pkt = &s->pkt;
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114 unsigned short cksum;
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115 dword tcp_magic;
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116 int tcp_magic_size = sizeof(tcp_magic);
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117
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118 ip = pkt->ip_hdr;
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119 tcp = pkt->tcp_hdr;
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120
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121 if (flags & TCP_FLAG_SYN) {
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122 /* If SYN, assume no data and send MSS option in tcp header */
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123 pkt->pkt_bytes = sizeof(tcp_header_t) + 4;
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124 tcp->hdr_len = 6;
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125 tcp_magic = htonl(0x02040000 | MAX_TCP_DATA);
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126 memcpy((unsigned char *)(tcp+1), &tcp_magic, tcp_magic_size);
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127 s->data_bytes = 0;
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128 } else {
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129 pkt->pkt_bytes = s->data_bytes + sizeof(tcp_header_t);
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130 tcp->hdr_len = 5;
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131 }
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132
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133 /* tcp header */
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134 tcp->reserved = 0;
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135 tcp->seqnum = htonl(s->seq);
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136 tcp->acknum = htonl(s->ack);
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137 tcp->checksum = 0;
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138
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139 if (!resend) {
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140 tcp->src_port = htons(s->our_port);
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141 tcp->dest_port = htons(s->his_port);
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142 tcp->flags = flags;
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143 /* always set PUSH flag if sending data */
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144 if (s->data_bytes)
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145 tcp->flags |= TCP_FLAG_PSH;
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146 tcp->window = htons(MAX_TCP_DATA);
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147 tcp->urgent = 0;
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148
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149 /* fill in some pseudo-header fields */
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150 memcpy(ip->source, __local_ip_addr, sizeof(ip_addr_t));
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151 memcpy(ip->destination, s->his_addr.ip_addr, sizeof(ip_addr_t));
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152 ip->protocol = IP_PROTO_TCP;
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153 }
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154
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155 /* another pseudo-header field */
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156 ip->length = htons(pkt->pkt_bytes);
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157
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158 /* compute tcp checksum */
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159 cksum = __sum((word *)tcp, pkt->pkt_bytes, __pseudo_sum(ip));
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160 tcp->checksum = htons(cksum);
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161
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162 __ip_send(pkt, IP_PROTO_TCP, &s->his_addr);
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163
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164 BSPLOG(bsp_log("tcp_send: state[%d] flags[%s] ack[%x] data[%d].\n",
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165 s->state, flags_to_str(tcp->flags), s->ack, s->data_bytes));
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166
208
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167 if (s->state == _TIME_WAIT) {
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168 // If 'reuse' is set on socket, close after 1 second, otherwise 2 minutes
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169 __timer_set(&s->timer, s->reuse ? 1000 : 120000, do_close, s);
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170 }
115
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171 else if ((tcp->flags & (TCP_FLAG_FIN | TCP_FLAG_SYN)) || s->data_bytes)
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172 __timer_set(&s->timer, 1000, do_retrans, s);
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173 }
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174
208
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175 static pktbuf_t ack_pkt;
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176 static word ack_buf[ETH_MIN_PKTLEN/sizeof(word)];
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177
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178 /*
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179 * Send an ack.
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180 */
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181 static void
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182 send_ack(tcp_socket_t *s)
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183 {
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184 tcp_header_t *tcp;
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185 ip_header_t *ip;
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186 unsigned short cksum;
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187
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188 ack_pkt.buf = ack_buf;
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189 ack_pkt.bufsize = sizeof(ack_buf);
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190 ack_pkt.ip_hdr = ip = (ip_header_t *)ack_buf;
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191 ack_pkt.tcp_hdr = tcp = (tcp_header_t *)(ip + 1);
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192 ack_pkt.pkt_bytes = sizeof(tcp_header_t);
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193
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194 /* tcp header */
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195 tcp->hdr_len = 5;
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196 tcp->reserved = 0;
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197 tcp->seqnum = htonl(s->seq);
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198 tcp->acknum = htonl(s->ack);
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199 tcp->checksum = 0;
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200
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201 tcp->src_port = htons(s->our_port);
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202 tcp->dest_port = htons(s->his_port);
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203 tcp->flags = TCP_FLAG_ACK;
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204
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205 tcp->window = htons(MAX_TCP_DATA);
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206 tcp->urgent = 0;
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207
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208 /* fill in some pseudo-header fields */
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209 memcpy(ip->source, __local_ip_addr, sizeof(ip_addr_t));
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210 memcpy(ip->destination, s->his_addr.ip_addr, sizeof(ip_addr_t));
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211 ip->protocol = IP_PROTO_TCP;
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212
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213 /* another pseudo-header field */
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214 ip->length = htons(sizeof(tcp_header_t));
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215
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216 /* compute tcp checksum */
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217 cksum = __sum((word *)tcp, sizeof(*tcp), __pseudo_sum(ip));
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218 tcp->checksum = htons(cksum);
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219
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220 __ip_send(&ack_pkt, IP_PROTO_TCP, &s->his_addr);
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221 }
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222
115
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223
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224 /*
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225 * Send a reset for a bogus incoming segment.
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226 */
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227 static void
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228 send_reset(pktbuf_t *pkt, ip_route_t *r)
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229 {
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230 ip_header_t *ip = pkt->ip_hdr;
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231 tcp_header_t *tcp = pkt->tcp_hdr;
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232 dword seq, ack;
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233 word src, dest;
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234 word cksum;
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235
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236 seq = ntohl(tcp->acknum);
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237 ack = ntohl(tcp->seqnum);
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238 src = ntohs(tcp->dest_port);
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239 dest = ntohs(tcp->src_port);
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240
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241 tcp = (tcp_header_t *)(ip + 1);
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242 pkt->pkt_bytes = sizeof(tcp_header_t);
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243
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244 /* tcp header */
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245 tcp->hdr_len = 5;
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246 tcp->reserved = 0;
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247 tcp->seqnum = htonl(seq);
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248 tcp->acknum = htonl(ack);
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249 tcp->window = htons(1024);
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250 tcp->urgent = 0;
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251 tcp->checksum = 0;
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252 tcp->src_port = htons(src);
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253 tcp->dest_port = htons(dest);
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254 tcp->flags = TCP_FLAG_RST | TCP_FLAG_ACK;
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255
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256 /* fill in some pseudo-header fields */
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257 memcpy(ip->source, __local_ip_addr, sizeof(ip_addr_t));
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258 memcpy(ip->destination, r->ip_addr, sizeof(ip_addr_t));
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259 ip->protocol = IP_PROTO_TCP;
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260 ip->length = htons(pkt->pkt_bytes);
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261
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262 /* compute tcp checksum */
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263 cksum = __sum((word *)tcp, pkt->pkt_bytes, __pseudo_sum(ip));
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264 tcp->checksum = htons(cksum);
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265
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266 __ip_send(pkt, IP_PROTO_TCP, r);
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267 }
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268
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269
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270
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271 /*
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272 * Remove given socket from socket list.
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273 */
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274 static void
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275 unlink_socket(tcp_socket_t *s)
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276 {
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277 tcp_socket_t *prev, *tp;
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278
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279 for (prev = NULL, tp = tcp_list; tp; prev = tp, tp = tp->next)
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280 if (tp == s) {
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281 BSPLOG(bsp_log("unlink tcp socket.\n"));
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282 if (prev)
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283 prev->next = s->next;
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284 else
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285 tcp_list = s->next;
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286 }
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287 }
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288
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289 /*
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290 * Retransmit last packet.
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291 */
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292 static void
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293 do_retrans(void *p)
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294 {
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295 BSPLOG(bsp_log("tcp do_retrans.\n"));
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296 tcp_send((tcp_socket_t *)p, 0, 1);
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297 }
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298
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299
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300 static void
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301 do_close(void *p)
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302 {
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303 BSPLOG(bsp_log("tcp do_close.\n"));
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304 /* close connection */
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305 ((tcp_socket_t *)p)->state = _CLOSED;
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306 unlink_socket(p);
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307 }
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diff changeset
308
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diff changeset
309
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310 static void
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311 free_rxlist(tcp_socket_t *s)
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312 {
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313 pktbuf_t *p;
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314
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315 BSPLOG(bsp_log("tcp free_rxlist.\n"));
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316
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317 while ((p = s->rxlist) != NULL) {
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318 s->rxlist = p->next;
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319 __pktbuf_free(p);
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320 }
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321 }
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322
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323
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324 /*
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325 * Handle a conection reset.
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326 */
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327 static void
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328 do_reset(tcp_socket_t *s)
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329 {
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330 /* close connection */
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331 s->state = _CLOSED;
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332 __timer_cancel(&s->timer);
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333 free_rxlist(s);
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334 unlink_socket(s);
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335 }
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diff changeset
336
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diff changeset
337
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338 /*
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339 * Extract data from incoming tcp segment.
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340 * Returns true if packet is queued on rxlist, false otherwise.
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341 */
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342 static int
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343 handle_data(tcp_socket_t *s, pktbuf_t *pkt)
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344 {
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345 tcp_header_t *tcp = pkt->tcp_hdr;
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346 unsigned int diff, seq;
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347 int data_len;
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348 char *data_ptr;
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349 pktbuf_t *p;
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350
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351 data_len = pkt->pkt_bytes - (tcp->hdr_len << 2);
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352 data_ptr = ((char *)tcp) + (tcp->hdr_len << 2);
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353
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354 seq = ntohl(tcp->seqnum);
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355
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356 BSPLOG(bsp_log("tcp data: seq[%x] len[%d].\n", seq, data_len));
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357
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358 if (SEQ_LE(seq, s->ack)) {
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359 /*
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360 * Figure difference between which byte we're expecting and which byte
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361 * is sent first. Adjust data length and data pointer accordingly.
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362 */
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363 diff = s->ack - seq;
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364 data_len -= diff;
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365 data_ptr += diff;
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366
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367 if (data_len > 0) {
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diff changeset
368 /* queue the new data */
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369 s->ack += data_len;
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370 pkt->next = NULL;
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371 if ((p = s->rxlist) != NULL) {
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diff changeset
372 while (p->next)
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373 p = p->next;
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374 p->next = pkt;
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375 BSPLOG(bsp_log("tcp data: Add pkt[%x] len[%d].\n",
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376 pkt, data_len));
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377 } else {
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378 s->rxlist = pkt;
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379 s->rxcnt = data_len;
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380 s->rxptr = data_ptr;
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381 BSPLOG(bsp_log("tcp data: pkt[%x] len[%d].\n",
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382 pkt, data_len));
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383 }
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384 return 1;
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385 }
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386 }
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387 return 0;
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388 }
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diff changeset
389
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diff changeset
390
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391 static void
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392 handle_ack(tcp_socket_t *s, pktbuf_t *pkt)
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393 {
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394 tcp_header_t *tcp = pkt->tcp_hdr;
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395 dword ack;
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396 int advance;
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397 char *dp;
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diff changeset
398
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diff changeset
399 /* process ack value in packet */
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400 ack = ntohl(tcp->acknum);
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diff changeset
401
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402 BSPLOG(bsp_log("Rcvd tcp ACK %x\n", ack));
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diff changeset
403
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diff changeset
404 if (SEQ_GT(ack, s->seq)) {
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diff changeset
405 __timer_cancel(&s->timer);
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diff changeset
406 advance = ack - s->seq;
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jlarmour
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diff changeset
407 if (advance > s->data_bytes)
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diff changeset
408 advance = s->data_bytes;
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diff changeset
409
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410 BSPLOG(bsp_log("seq advance %d", advance));
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diff changeset
411
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diff changeset
412 if (advance > 0) {
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diff changeset
413 s->seq += advance;
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diff changeset
414 s->data_bytes -= advance;
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diff changeset
415 if (s->data_bytes) {
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diff changeset
416 /* other end ack'd only part of the pkt */
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417 BSPLOG(bsp_log(" %d bytes left", s->data_bytes));
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418 dp = (char *)(s->pkt.tcp_hdr + 1);
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419 memcpy(dp, dp + advance, s->data_bytes);
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diff changeset
420 }
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diff changeset
421 }
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diff changeset
422 }
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423 BSPLOG(bsp_log("\n"));
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diff changeset
424 }
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diff changeset
425
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
426
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
427 /*
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
428 * Handle incoming TCP packets.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
429 */
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
430 void
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
431 __tcp_handler(pktbuf_t *pkt, ip_route_t *r)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
432 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
433 tcp_header_t *tcp = pkt->tcp_hdr;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
434 ip_header_t *ip = pkt->ip_hdr;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
435 tcp_socket_t *prev,*s;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
436 dword ack;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
437 int queued = 0;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
438
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
439 /* set length for pseudo sum calculation */
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
440 ip->length = htons(pkt->pkt_bytes);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
441
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
442 if (__sum((word *)tcp, pkt->pkt_bytes, __pseudo_sum(ip)) == 0) {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
443 for (prev = NULL, s = tcp_list; s; prev = s, s = s->next) {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
444 if (s->our_port == ntohs(tcp->dest_port)) {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
445 if (s->his_port == 0)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
446 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
447 if (s->his_port == ntohs(tcp->src_port) &&
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
448 !memcmp(r->ip_addr, s->his_addr.ip_addr, sizeof(ip_addr_t)))
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
449 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
450 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
451 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
452
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
453 if (s) {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
454 /* found the socket this packet belongs to */
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
455
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
456 /* refresh his ethernet address */
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
457 memcpy(s->his_addr.enet_addr, r->enet_addr, sizeof(enet_addr_t));
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
458
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
459 if (s->state != _SYN_RCVD && tcp->flags & TCP_FLAG_RST) {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
460 BSPLOG(bsp_log("TCP_FLAG_RST rcvd\n"));
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
461 do_reset(s);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
462 __pktbuf_free(pkt);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
463 return;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
464 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
465
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
466 switch (s->state) {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
467
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
468 case _SYN_SENT:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
469 /* active open not supported */
210
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST
jlarmour
parents: 208
diff changeset
470 if (tcp->flags != (TCP_FLAG_SYN | TCP_FLAG_ACK)) {
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST
jlarmour
parents: 208
diff changeset
471 do_reset(s);
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST
jlarmour
parents: 208
diff changeset
472 __pktbuf_free(pkt);
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST
jlarmour
parents: 208
diff changeset
473 return;
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST
jlarmour
parents: 208
diff changeset
474 }
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST
jlarmour
parents: 208
diff changeset
475 s->state = _ESTABLISHED;
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST
jlarmour
parents: 208
diff changeset
476 s->ack = ntohl(tcp->seqnum) + 1;
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST
jlarmour
parents: 208
diff changeset
477 s->seq = ntohl(tcp->acknum);
1444
d9e058a49f03 TCP SYN fix - from Jani Monoses
gthomas
parents: 1259
diff changeset
478 __timer_cancel(&s->timer);
210
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST
jlarmour
parents: 208
diff changeset
479 send_ack(s);
115
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
480 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
481
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
482 case _LISTEN:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
483 if (tcp->flags & TCP_FLAG_SYN) {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
484 s->state = _SYN_RCVD;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
485 s->ack = ntohl(tcp->seqnum) + 1;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
486 s->his_port = ntohs(tcp->src_port);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
487 memcpy(s->his_addr.ip_addr, r->ip_addr, sizeof(ip_addr_t));
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
488 s->data_bytes = 0;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
489
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
490 BSPLOG(bsp_log("SYN from %d.%d.%d.%d:%d (seq %x)\n",
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
491 s->his_addr.ip_addr[0],s->his_addr.ip_addr[1],
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
492 s->his_addr.ip_addr[2],s->his_addr.ip_addr[3],
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
493 s->his_port, ntohl(tcp->seqnum)));
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
494
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
495 tcp_send(s, TCP_FLAG_SYN | TCP_FLAG_ACK, 0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
496 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
497 else
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
498 send_reset(pkt, r);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
499 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
500
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
501 case _SYN_RCVD:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
502 BSPLOG(bsp_log("_SYN_RCVD timer cancel.\n"));
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
503 __timer_cancel(&s->timer);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
504
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
505 /* go back to _LISTEN state if reset */
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
506 if (tcp->flags & TCP_FLAG_RST) {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
507 s->state = _LISTEN;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
508
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
509 BSPLOG(bsp_log("_SYN_RCVD --> _LISTEN\n"));
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
510
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
511 } else if (tcp->flags & TCP_FLAG_SYN) {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
512 /* apparently our SYN/ACK was lost? */
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
513 tcp_send(s, 0, 1);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
514
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
515 BSPLOG(bsp_log("retransmitting SYN/ACK\n"));
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
516
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
517 } else if ((tcp->flags & TCP_FLAG_ACK) &&
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
518 ntohl(tcp->acknum) == (s->seq + 1)) {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
519 /* we've established the connection */
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
520 s->state = _ESTABLISHED;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
521 s->seq++;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
522
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
523 BSPLOG(bsp_log("ACK received - connection established\n"));
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
524 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
525 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
526
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
527 case _ESTABLISHED:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
528 case _CLOSE_WAIT:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
529 ack = s->ack; /* save original ack */
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
530 if (tcp->flags & TCP_FLAG_ACK)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
531 handle_ack(s, pkt);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
532
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
533 queued = handle_data(s, pkt);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
534
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
535 if ((tcp->flags & TCP_FLAG_FIN) &&
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
536 ntohl(tcp->seqnum) == s->ack) {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
537
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
538 BSPLOG(bsp_log("FIN received - going to _CLOSE_WAIT\n"));
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
539
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
540 s->ack++;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
541 s->state = _CLOSE_WAIT;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
542 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
543 /*
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
544 * Send an ack if neccessary.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
545 */
208
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 198
diff changeset
546 if (s->ack != ack || pkt->pkt_bytes > (tcp->hdr_len << 2))
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 198
diff changeset
547 send_ack(s);
115
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
548 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
549
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
550 case _LAST_ACK:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
551 if (tcp->flags & TCP_FLAG_ACK) {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
552 handle_ack(s, pkt);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
553 if (ntohl(tcp->acknum) == (s->seq + 1)) {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
554 BSPLOG(bsp_log("_LAST_ACK --> _CLOSED\n"));
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
555 s->state = _CLOSED;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
556 unlink_socket(s);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
557 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
558 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
559 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
560
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
561 case _FIN_WAIT_1:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
562 if (tcp->flags & TCP_FLAG_ACK) {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
563 handle_ack(s, pkt);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
564 if (ntohl(tcp->acknum) == (s->seq + 1)) {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
565 /* got ACK for FIN packet */
156
b939e9cada46 Merge from eCos master repository on 2001-03-29-21:44:39-BST
jlarmour
parents: 149
diff changeset
566 s->seq++;
115
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
567 if (tcp->flags & TCP_FLAG_FIN) {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
568 BSPLOG(bsp_log("_FIN_WAIT_1 --> _TIME_WAIT\n"));
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
569 s->ack++;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
570 s->state = _TIME_WAIT;
208
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 198
diff changeset
571 send_ack(s);
115
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
572 } else {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
573 s->state = _FIN_WAIT_2;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
574 BSPLOG(bsp_log("_FIN_WAIT_1 --> _FIN_WAIT_2\n"));
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
575 }
208
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 198
diff changeset
576 break; /* All done for now */
115
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
577 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
578 }
208
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 198
diff changeset
579 /* At this point, no ACK for FIN has been seen, so check for
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 198
diff changeset
580 simultaneous close */
115
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
581 if (tcp->flags & TCP_FLAG_FIN) {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
582 BSPLOG(bsp_log("_FIN_WAIT_1 --> _CLOSING\n"));
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
583 __timer_cancel(&s->timer);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
584 s->ack++;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
585 s->state = _CLOSING;
208
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 198
diff changeset
586 /* FIN is resent so the timeout and retry for this packet
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 198
diff changeset
587 will also take care of timeout and resend of the
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 198
diff changeset
588 previously sent FIN (which got us to FIN_WAIT_1). While
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 198
diff changeset
589 not technically correct, resending FIN only causes a
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 198
diff changeset
590 duplicate FIN (same sequence number) which should be
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 198
diff changeset
591 ignored by the other end. */
115
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
592 tcp_send(s, TCP_FLAG_FIN | TCP_FLAG_ACK, 0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
593 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
594 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
595
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
596 case _FIN_WAIT_2:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
597 queued = handle_data(s, pkt);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
598 if (tcp->flags & TCP_FLAG_FIN) {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
599 BSPLOG(bsp_log("_FIN_WAIT_2 --> _TIME_WAIT\n"));
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
600 s->ack++;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
601 s->state = _TIME_WAIT;
208
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 198
diff changeset
602 send_ack(s);
115
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
603 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
604 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
605
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
606 case _CLOSING:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
607 if (tcp->flags & TCP_FLAG_ACK) {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
608 handle_ack(s, pkt);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
609 if (ntohl(tcp->acknum) == (s->seq + 1)) {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
610 /* got ACK for FIN packet */
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
611 BSPLOG(bsp_log("_CLOSING --> _TIME_WAIT\n"));
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
612 __timer_cancel(&s->timer);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
613 s->state = _TIME_WAIT;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
614 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
615 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
616 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
617
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
618 case _TIME_WAIT:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
619 BSPLOG(bsp_log("_TIME_WAIT resend.\n"));
156
b939e9cada46 Merge from eCos master repository on 2001-03-29-21:44:39-BST
jlarmour
parents: 149
diff changeset
620 if (tcp->flags & TCP_FLAG_FIN)
b939e9cada46 Merge from eCos master repository on 2001-03-29-21:44:39-BST
jlarmour
parents: 149
diff changeset
621 tcp_send(s, 0, 1); /* just resend ack */
115
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
622 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
623 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
624 } else {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
625 BSPLOG(bsp_log("Unexpected segment from: %d.%d.%d.%d:%d\n",
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
626 r->ip_addr[0], r->ip_addr[1], r->ip_addr[3],
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
627 r->ip_addr[4], ntohs(tcp->src_port)));
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
628 send_reset(pkt, r);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
629 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
630 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
631 if (!queued)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
632 __pktbuf_free(pkt);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
633 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
634
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
635
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
636 void
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
637 __tcp_poll(void)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
638 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
639 __enet_poll();
198
ea3f0bd33a73 Merge from eCos master repository on 2001-12-07-11:40:47-GMT
jlarmour
parents: 156
diff changeset
640 MS_TICKS_DELAY();
115
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
641 __timer_poll();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
642 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
643
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
644
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
645 int
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
646 __tcp_listen(tcp_socket_t *s, word port)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
647 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
648 BSPLOG(bsp_log("tcp_listen: s[%p] port[%x]\n", s, port));
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
649
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
650 memset(s, 0, sizeof(tcp_socket_t));
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
651 s->state = _LISTEN;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
652 s->our_port = port;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
653 s->pkt.buf = (word *)s->pktbuf;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
654 s->pkt.bufsize = ETH_MAX_PKTLEN;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
655 s->pkt.ip_hdr = (ip_header_t *)s->pkt.buf;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
656 s->pkt.tcp_hdr = (tcp_header_t *)(s->pkt.ip_hdr + 1);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
657
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
658 s->next = tcp_list;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
659
210
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST
jlarmour
parents: 208
diff changeset
660 #if 0
115
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
661 /* limit to one open socket at a time */
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
662 if (s->next) {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
663 BSPLOG(bsp_log("tcp_listen: recursion error\n"));
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
664 BSPLOG(while(1));
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
665 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
666 #endif
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
667
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
668 tcp_list = s;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
669
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
670 return 0;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
671 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
672
208
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 198
diff changeset
673 /*
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 198
diff changeset
674 * SO_REUSEADDR, no 2MSL.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 198
diff changeset
675 */
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 198
diff changeset
676 void
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 198
diff changeset
677 __tcp_so_reuseaddr(tcp_socket_t *s)
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 198
diff changeset
678 {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 198
diff changeset
679 // BSPLOG(bsp_log("__tcp_so_reuseaddr.\n"));
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 198
diff changeset
680 s->reuse = 0x01;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 198
diff changeset
681 }
115
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
682
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
683 /*
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
684 * Block while waiting for all data to be transmitted.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
685 */
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
686 void
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
687 __tcp_drain(tcp_socket_t *s)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
688 {
143
6b5f480c6929 Merge from eCos master repository on 2000-12-08-02:09:36-GMT
jlarmour
parents: 115
diff changeset
689 // BSPLOG(bsp_log("__tcp_drain.\n"));
115
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
690 while (s->state != _CLOSED && s->data_bytes)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
691 __tcp_poll();
143
6b5f480c6929 Merge from eCos master repository on 2000-12-08-02:09:36-GMT
jlarmour
parents: 115
diff changeset
692 // BSPLOG(bsp_log("__tcp_drain done.\n"));
115
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
693 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
694
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
695
242
56f2780a49bc RedBoot ICMP patch from Hendrik.Ruijter@axis.com
msalter
parents: 210
diff changeset
696 /*
56f2780a49bc RedBoot ICMP patch from Hendrik.Ruijter@axis.com
msalter
parents: 210
diff changeset
697 * Close the tcp connection.
56f2780a49bc RedBoot ICMP patch from Hendrik.Ruijter@axis.com
msalter
parents: 210
diff changeset
698 */
56f2780a49bc RedBoot ICMP patch from Hendrik.Ruijter@axis.com
msalter
parents: 210
diff changeset
699 static void
56f2780a49bc RedBoot ICMP patch from Hendrik.Ruijter@axis.com
msalter
parents: 210
diff changeset
700 do_abort(void *s)
56f2780a49bc RedBoot ICMP patch from Hendrik.Ruijter@axis.com
msalter
parents: 210
diff changeset
701 {
56f2780a49bc RedBoot ICMP patch from Hendrik.Ruijter@axis.com
msalter
parents: 210
diff changeset
702 BSPLOG(bsp_log("do_abort: send RST\n"));
56f2780a49bc RedBoot ICMP patch from Hendrik.Ruijter@axis.com
msalter
parents: 210
diff changeset
703 tcp_send((tcp_socket_t *)s, TCP_FLAG_ACK | TCP_FLAG_RST, 0);
56f2780a49bc RedBoot ICMP patch from Hendrik.Ruijter@axis.com
msalter
parents: 210
diff changeset
704 __timer_cancel(&abort_timer);
56f2780a49bc RedBoot ICMP patch from Hendrik.Ruijter@axis.com
msalter
parents: 210
diff changeset
705 ((tcp_socket_t *)s)->state = _CLOSED;
56f2780a49bc RedBoot ICMP patch from Hendrik.Ruijter@axis.com
msalter
parents: 210
diff changeset
706 free_rxlist((tcp_socket_t *)s);
56f2780a49bc RedBoot ICMP patch from Hendrik.Ruijter@axis.com
msalter
parents: 210
diff changeset
707 unlink_socket((tcp_socket_t *)s);
56f2780a49bc RedBoot ICMP patch from Hendrik.Ruijter@axis.com
msalter
parents: 210
diff changeset
708 }
56f2780a49bc RedBoot ICMP patch from Hendrik.Ruijter@axis.com
msalter
parents: 210
diff changeset
709
56f2780a49bc RedBoot ICMP patch from Hendrik.Ruijter@axis.com
msalter
parents: 210
diff changeset
710 void
56f2780a49bc RedBoot ICMP patch from Hendrik.Ruijter@axis.com
msalter
parents: 210
diff changeset
711 __tcp_abort(tcp_socket_t *s, unsigned long delay)
56f2780a49bc RedBoot ICMP patch from Hendrik.Ruijter@axis.com
msalter
parents: 210
diff changeset
712 {
56f2780a49bc RedBoot ICMP patch from Hendrik.Ruijter@axis.com
msalter
parents: 210
diff changeset
713 __timer_set(&abort_timer, delay, do_abort, s);
56f2780a49bc RedBoot ICMP patch from Hendrik.Ruijter@axis.com
msalter
parents: 210
diff changeset
714 }
115
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
715
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
716 /*
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
717 * Close the tcp connection.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
718 */
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
719 void
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
720 __tcp_close(tcp_socket_t *s)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
721 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
722 __tcp_drain(s);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
723 if (s->state == _ESTABLISHED || s->state == _SYN_RCVD) {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
724 BSPLOG(bsp_log("__tcp_close: going to _FIN_WAIT_1\n"));
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
725 s->state = _FIN_WAIT_1;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
726 tcp_send(s, TCP_FLAG_ACK | TCP_FLAG_FIN, 0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
727 } else if (s->state == _CLOSE_WAIT) {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
728
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
729 BSPLOG(bsp_log("__tcp_close: going to _LAST_ACK\n"));
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
730
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
731 s->state = _LAST_ACK;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
732 tcp_send(s, TCP_FLAG_ACK | TCP_FLAG_FIN, 0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
733 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
734 free_rxlist(s);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
735 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
736
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
737
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
738 /*
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
739 * Wait for connection to be fully closed.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
740 */
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
741 void
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
742 __tcp_close_wait(tcp_socket_t *s)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
743 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
744 BSPLOG(bsp_log("__tcp_close_wait.\n"));
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
745 while (s->state != _CLOSED)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
746 __tcp_poll();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
747 BSPLOG(bsp_log("__tcp_close_wait done.\n"));
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
748 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
749
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
750
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
751 /*
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
752 * Read up to 'len' bytes without blocking.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
753 */
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
754 int
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
755 __tcp_read(tcp_socket_t *s, char *buf, int len)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
756 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
757 int nread;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
758 pktbuf_t *pkt;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
759 tcp_header_t *tcp;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
760
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
761 if (len <= 0 || s->rxcnt == 0)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
762 return 0;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
763
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
764 if (s->state != _ESTABLISHED && s->rxcnt == 0)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
765 return -1;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
766
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
767 nread = 0;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
768 while (len) {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
769 if (len < s->rxcnt) {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
770 memcpy(buf, s->rxptr, len);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
771 BSPLOG(bsp_log("tcp_read: read %d bytes.\n", len));
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
772 s->rxptr += len;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
773 s->rxcnt -= len;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
774 nread += len;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
775
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
776 BSPLOG(bsp_log("tcp_read: %d bytes left in rxlist head.\n",
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
777 s->rxcnt));
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
778
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
779 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
780 } else {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
781 memcpy(buf, s->rxptr, s->rxcnt);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
782 BSPLOG(bsp_log("tcp_read: read %d bytes. pkt[%x] freed.\n",
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
783 s->rxcnt, s->rxlist));
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
784 nread += s->rxcnt;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
785 buf += s->rxcnt;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
786 len -= s->rxcnt;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
787
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
788 /* setup for next packet in list */
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
789 pkt = s->rxlist;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
790 s->rxlist = pkt->next;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
791 __pktbuf_free(pkt);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
792
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
793 if ((pkt = s->rxlist) != NULL) {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
794 tcp = pkt->tcp_hdr;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
795 s->rxcnt = pkt->pkt_bytes - (tcp->hdr_len << 2);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
796 s->rxptr = ((char *)tcp) + (tcp->hdr_len << 2);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
797
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
798 BSPLOG(bsp_log("tcp_read: next pkt[%x] has %d bytes.\n",
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
799 s->rxlist, s->rxcnt));
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
800 } else {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
801
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
802 BSPLOG(bsp_log("tcp_read: no more data.\n"));
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
803
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
804 s->rxcnt = 0;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
805 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
806 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
807 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
808 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
809 return nread;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
810 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
811
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
812
210
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST
jlarmour
parents: 208
diff changeset
813 /*
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST
jlarmour
parents: 208
diff changeset
814 * Write up to 'len' bytes without blocking
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST
jlarmour
parents: 208
diff changeset
815 */
115
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
816 int
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
817 __tcp_write(tcp_socket_t *s, char *buf, int len)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
818 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
819 tcp_header_t *tcp = s->pkt.tcp_hdr;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
820
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
821 if (len <= 0)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
822 return 0;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
823
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
824 if (s->state != _ESTABLISHED && s->state != _CLOSE_WAIT)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
825 return -1;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
826
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
827 if (s->data_bytes)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
828 return 0;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
829
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
830 if (len > MAX_TCP_DATA)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
831 len = MAX_TCP_DATA;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
832
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
833 memcpy(tcp + 1, buf, len);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
834 s->data_bytes = len;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
835
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
836 tcp_send(s, TCP_FLAG_ACK, 0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
837
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
838 return len;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
839 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
840
210
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST
jlarmour
parents: 208
diff changeset
841 /*
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST
jlarmour
parents: 208
diff changeset
842 * Write 'len' bytes from 'buf', blocking until sent.
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST
jlarmour
parents: 208
diff changeset
843 * If connection collapses, return -1
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST
jlarmour
parents: 208
diff changeset
844 */
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST
jlarmour
parents: 208
diff changeset
845 int
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST
jlarmour
parents: 208
diff changeset
846 __tcp_write_block(tcp_socket_t *s, char *buf, int len)
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST
jlarmour
parents: 208
diff changeset
847 {
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST
jlarmour
parents: 208
diff changeset
848 int total = 0;
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST
jlarmour
parents: 208
diff changeset
849 int n;
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST
jlarmour
parents: 208
diff changeset
850
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST
jlarmour
parents: 208
diff changeset
851 while (len) {
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST
jlarmour
parents: 208
diff changeset
852 if (s->state == _CLOSE_WAIT) {
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST
jlarmour
parents: 208
diff changeset
853 // This connection is tring to close
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST
jlarmour
parents: 208
diff changeset
854 // This connection is breaking
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST
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855 if (s->data_bytes == 0 && s->rxcnt == 0)
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856 __tcp_close(s);
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857 }
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858 if (s->state == _CLOSED) {
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859 // The connection is gone!
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860 return -1;
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861 }
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862 n = __tcp_write(s, buf, len);
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863 if (n > 0) {
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864 len -= n;
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865 buf += n;
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866 }
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867 __tcp_poll();
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868 }
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869 __tcp_drain(s);
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870 return total;
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871 }
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872
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873 /*
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874 * Establish a new [outgoing] connection, with a timeout.
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875 */
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876 int
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877 __tcp_open(tcp_socket_t *s, struct sockaddr_in *host,
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878 word port, int timeout, int *err)
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879 {
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880 // Fill in socket details
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881 memset(s, 0, sizeof(tcp_socket_t));
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882 s->state = _SYN_SENT;
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883 s->our_port = port;
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884 s->his_port = host->sin_port;
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885 s->pkt.buf = (word *)s->pktbuf;
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886 s->pkt.bufsize = ETH_MAX_PKTLEN;
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887 s->pkt.ip_hdr = (ip_header_t *)s->pkt.buf;
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888 s->pkt.tcp_hdr = (tcp_header_t *)(s->pkt.ip_hdr + 1);
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889 s->seq = (port << 16) | 0xDE77;
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890 s->ack = 0;
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891 if (__arp_lookup((ip_addr_t *)&host->sin_addr, &s->his_addr) < 0) {
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892 diag_printf("%s: Can't find address of server\n", __FUNCTION__);
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893 return -1;
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894 }
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895 s->next = tcp_list;
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896 tcp_list = s;
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897
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898 // Send off the SYN packet to open the connection
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899 tcp_send(s, TCP_FLAG_SYN, 0);
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900 // Wait for connection to establish
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901 while (s->state != _ESTABLISHED) {
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902 if (s->state == _CLOSED) {
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903 diag_printf("TCP open - host closed connection\n");
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904 return -1;
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905 }
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906 if (--timeout <= 0) {
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907 diag_printf("TCP open - connection timed out\n");
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908 return -1;
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909 }
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910 MS_TICKS_DELAY();
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911 __tcp_poll();
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912 }
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913 return 0;
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914 }
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915
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916