1 | |
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2 | //////////////////////////////////////////////////////////////////////////////// |
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3 | // Copyright (c) 2004 Xilinx, Inc. All rights reserved. |
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4 | // |
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5 | // Xilinx, Inc. |
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6 | // XILINX IS PROVIDING THIS DESIGN, CODE, OR INFORMATION "AS IS" AS A |
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7 | // COURTESY TO YOU. BY PROVIDING THIS DESIGN, CODE, OR INFORMATION AS |
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8 | // ONE POSSIBLE IMPLEMENTATION OF THIS FEATURE, APPLICATION OR |
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9 | // STANDARD, XILINX IS MAKING NO REPRESENTATION THAT THIS IMPLEMENTATION |
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10 | // IS FREE FROM ANY CLAIMS OF INFRINGEMENT, AND YOU ARE RESPONSIBLE |
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11 | // FOR OBTAINING ANY RIGHTS YOU MAY REQUIRE FOR YOUR IMPLEMENTATION. |
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12 | // XILINX EXPRESSLY DISCLAIMS ANY WARRANTY WHATSOEVER WITH RESPECT TO |
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13 | // THE ADEQUACY OF THE IMPLEMENTATION, INCLUDING BUT NOT LIMITED TO |
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14 | // ANY WARRANTIES OR REPRESENTATIONS THAT THIS IMPLEMENTATION IS FREE |
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15 | // FROM CLAIMS OF INFRINGEMENT, IMPLIED WARRANTIES OF MERCHANTABILITY |
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16 | // AND FITNESS FOR A PARTICULAR PURPOSE. |
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17 | // |
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18 | // File : xilsock.c |
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19 | // Date : 2002, March 20. |
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20 | // Author : Sathya Thammanur |
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21 | // Company: Xilinx |
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22 | // Group : Emerging Software Technologies |
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23 | // |
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24 | // Summary: |
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25 | // Xilinx internal socket related functions (xilsock functions) |
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26 | // |
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27 | // $Id: xilsock.c,v 1.2.8.6 2005/11/15 23:41:10 salindac Exp $ |
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28 | // |
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29 | //////////////////////////////////////////////////////////////////////////////// |
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30 | |
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31 | //////////////////////////////////////////////////////////////////////////////// |
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32 | // see copyright.txt for Rice University/Mango Communications modifications |
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33 | //////////////////////////////////////////////////////////////////////////////// |
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34 | |
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35 | #include <xilnet_config.h> |
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36 | |
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37 | /* |
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38 | * Print the xilsock error message |
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39 | */ |
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40 | |
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41 | void xilsock_print_error_msg( unsigned int eth_dev_num ) { |
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42 | xil_printf(" **** ERROR: Ethernet device %d is not supported by the WARPxilnet library. \n", (eth_dev_num+1) ); |
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43 | xil_printf(" Please check library configuration in the BSP. \n" ); |
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44 | } |
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45 | |
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46 | |
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47 | |
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48 | /* |
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49 | * Initialization of xilsock_sockets |
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50 | */ |
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51 | |
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52 | int xilsock_init (unsigned int eth_dev_num) { |
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53 | |
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54 | int i; |
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55 | |
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56 | struct xilsock_socket * sockets = (struct xilsock_socket *)eth_device[eth_dev_num].xilsock_sockets; |
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57 | |
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58 | // Check to see if the xilnet driver uses the Ethernet instance |
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59 | if ( !eth_device[eth_dev_num].uses_driver ) { |
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60 | xilsock_print_error_msg( eth_dev_num ); |
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61 | return -1; |
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62 | } |
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63 | |
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64 | if (!eth_device[eth_dev_num].is_xilsock_init) { |
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65 | for (i = 0; i < NO_OF_XILSOCKS; i++) { |
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66 | sockets[i].type = 0; |
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67 | sockets[i].domain = 0; |
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68 | sockets[i].proto = 0; |
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69 | sockets[i].listen = 0; |
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70 | sockets[i].bound = 0; |
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71 | sockets[i].accept = 0; |
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72 | sockets[i].connect = 0; |
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73 | sockets[i].closing = 0; |
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74 | sockets[i].closed = 0; |
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75 | sockets[i].free = 1; |
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76 | sockets[i].conn.tcp_conn = NULL; |
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77 | sockets[i].recvbuf.buf = NULL; |
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78 | sockets[i].recvbuf.size = 0; |
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79 | } |
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80 | eth_device[eth_dev_num].is_xilsock_init = 1; |
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81 | } |
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82 | return eth_device[eth_dev_num].is_xilsock_init; |
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83 | } |
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84 | |
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85 | |
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86 | /* |
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87 | * Release a socket |
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88 | */ |
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89 | |
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90 | void xilsock_rel_socket (int sd, unsigned int eth_dev_num) { |
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91 | |
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92 | struct xilsock_socket * sockets = (struct xilsock_socket *)eth_device[eth_dev_num].xilsock_sockets; |
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93 | |
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94 | // Check to see if the xilnet driver uses the Ethernet instance |
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95 | if ( !eth_device[eth_dev_num].uses_driver ) { |
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96 | xilsock_print_error_msg( eth_dev_num ); |
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97 | return; |
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98 | } |
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99 | |
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100 | // Zero out the socket |
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101 | memset( &( sockets[sd] ), 0x0, sizeof( xilsock_socket ) ); |
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102 | |
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103 | // Set the free field |
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104 | sockets[sd].free = 1; |
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105 | |
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106 | |
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107 | #if 0 |
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108 | if (sockets[sd].type == SOCK_STREAM) { |
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109 | sockets[sd].conn.tcp_conn = NULL; |
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110 | } |
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111 | else { |
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112 | sockets[sd].conn.udp_conn = NULL; |
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113 | } |
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114 | sockets[sd].type = 0; |
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115 | sockets[sd].domain = 0; |
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116 | sockets[sd].proto = 0; |
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117 | sockets[sd].listen = 0; |
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118 | sockets[sd].bound = 0; |
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119 | sockets[sd].accept = 0; |
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120 | sockets[sd].connect = 0; |
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121 | sockets[sd].closing = 0; |
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122 | sockets[sd].closed = 0; |
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123 | sockets[sd].free = 1; |
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124 | sockets[sd].recvbuf.buf = NULL; |
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125 | sockets[sd].recvbuf.size = 0; |
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126 | #endif |
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127 | |
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128 | } |
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129 | |
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130 | |
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131 | /* |
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132 | * Allocate a xilsock_socket and return socket descriptor |
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133 | * if not able to alloc socket, return -1 |
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134 | */ |
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135 | |
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136 | int xilsock_socket(int domain, int type, int proto, unsigned int eth_dev_num) { |
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137 | |
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138 | int sd; |
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139 | struct xilsock_socket * sockets = (struct xilsock_socket *)eth_device[eth_dev_num].xilsock_sockets; |
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140 | |
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141 | // Check to see if the xilnet driver uses the Ethernet instance |
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142 | if ( !eth_device[eth_dev_num].uses_driver ) { |
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143 | xilsock_print_error_msg( eth_dev_num ); |
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144 | return -1; |
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145 | } |
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146 | |
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147 | // find a free xilsock_socket |
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148 | if (!xilsock_init(eth_dev_num)){ |
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149 | xil_printf("xilsock is not initialized\n"); |
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150 | return (-1); |
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151 | } |
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152 | |
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153 | for (sd = 0; sd < NO_OF_XILSOCKS; sd++) { |
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154 | if (sockets[sd].free) { |
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155 | // initialise the socket & make it unavailable |
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156 | sockets[sd].domain = domain; |
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157 | sockets[sd].type = type; |
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158 | sockets[sd].proto = proto; |
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159 | sockets[sd].free = 0; |
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160 | |
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161 | // Debug print: |
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162 | // xil_printf("Socket %d: [%d, %d, %d, %d] \n", sd, domain, type, proto, eth_dev_num); |
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163 | return sd; |
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164 | } |
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165 | } |
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166 | // return as no sockets available |
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167 | xil_printf("No sockets available on ethernet device %d!\n", eth_dev_num); |
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168 | return -1; |
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169 | } |
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170 | |
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171 | |
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172 | /* |
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173 | * bind a socket to the specified address. |
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174 | * binds addr to socket sd. returns 1 if bound |
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175 | * returns -1 if not able to bind |
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176 | */ |
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177 | |
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178 | int xilsock_bind(int sd, struct sockaddr* addr, int addrlen, void (*callback) (), unsigned int eth_dev_num) { |
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179 | |
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180 | int connd; |
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181 | struct xilsock_socket * sockets = (struct xilsock_socket *)eth_device[eth_dev_num].xilsock_sockets; |
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182 | struct xilnet_udp_conn * conns = (struct xilnet_udp_conn *)eth_device[eth_dev_num].xilnet_udp_conns; |
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183 | |
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184 | // Check to see if the xilnet driver uses the Ethernet instance |
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185 | if ( !eth_device[eth_dev_num].uses_driver ) { |
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186 | xilsock_print_error_msg( eth_dev_num ); |
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187 | return -1; |
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188 | } |
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189 | |
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190 | // open a tcp conn/udp conn |
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191 | if (sockets[sd].type == SOCK_STREAM) { |
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192 | xil_printf("*** Error xilsock_bind: tcp sockets not available \n"); |
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193 | xilsock_rel_socket(sd, eth_dev_num); |
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194 | return -1; |
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195 | } |
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196 | else if (sockets[sd].type == SOCK_DGRAM) { |
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197 | if ( (connd = xilnet_udp_open_conn (((struct sockaddr_in*)addr)->sin_port, callback, eth_dev_num)) == -1) { |
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198 | xil_printf("*** Error xilsock_bind: udp sockets not available \n"); |
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199 | xilsock_rel_socket(sd, eth_dev_num); |
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200 | return -1; |
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201 | } |
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202 | sockets[sd].conn.udp_conn = (conns + connd); |
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203 | // update fd of udp conn |
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204 | conns[connd].fd = sd; |
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205 | } |
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206 | |
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207 | return 1; |
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208 | } |
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209 | |
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210 | |
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211 | /* |
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212 | * listen on a socket |
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213 | * called from listen() |
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214 | */ |
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215 | |
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216 | int xilsock_listen(int s, int backlog, unsigned int eth_dev_num) { |
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217 | |
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218 | struct xilsock_socket * sockets = (struct xilsock_socket *)eth_device[eth_dev_num].xilsock_sockets; |
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219 | |
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220 | // Check to see if the xilnet driver uses the Ethernet instance |
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221 | if ( !eth_device[eth_dev_num].uses_driver ) { |
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222 | xilsock_print_error_msg( eth_dev_num ); |
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223 | return -1; |
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224 | } |
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225 | |
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226 | sockets[s].listen = 1; |
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227 | return 1; |
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228 | } |
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229 | |
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230 | |
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231 | |
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232 | /* |
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233 | * recv data on socket |
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234 | * called from recv() |
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235 | * returns -1 if no data recvd for "s" (non_blocking call) or |
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236 | * number of bytes recvd for "s" |
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237 | */ |
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238 | |
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239 | int xilsock_recv(int s, unsigned char *buf, unsigned int len, unsigned int eth_dev_num) { |
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240 | |
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241 | unsigned int n; |
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242 | struct xilsock_socket * sockets = (struct xilsock_socket *)eth_device[eth_dev_num].xilsock_sockets; |
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243 | int bytes_recvd = 0; |
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244 | |
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245 | // Check to see if the xilnet driver uses the Ethernet instance |
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246 | if ( !eth_device[eth_dev_num].uses_driver ) { |
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247 | xilsock_print_error_msg( eth_dev_num ); |
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248 | return -1; |
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249 | } |
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250 | |
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251 | if (s > NO_OF_XILSOCKS) { |
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252 | xil_printf("*** Error xilsock_recv: invalid socket descriptor %d \n", s); |
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253 | return -1; |
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254 | } |
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255 | |
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256 | n = xilnet_eth_recv_frame(eth_dev_num); |
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257 | |
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258 | // Return if data not for socket s |
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259 | if ((n == -1) || (sockets[s].recvbuf.buf == NULL)) |
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260 | return -1; |
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261 | |
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262 | // Copy data if required onto buf |
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263 | if (sockets[s].recvbuf.buf != buf) |
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264 | { |
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265 | memcpy(buf, sockets[s].recvbuf.buf, len); |
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266 | bytes_recvd = sockets[s].recvbuf.size; |
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267 | |
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268 | //reset socket buffer and size |
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269 | sockets[s].recvbuf.buf = NULL; |
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270 | sockets[s].recvbuf.size = 0; |
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271 | } |
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272 | |
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273 | // return no of bytes recvd for this conn |
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274 | return bytes_recvd; |
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275 | } |
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276 | |
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277 | |
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278 | /* |
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279 | * send data on socket |
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280 | * called from send() |
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281 | */ |
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282 | |
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283 | int xilsock_send(int s, unsigned char* buf, unsigned int len, unsigned int eth_dev_num) { |
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284 | |
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285 | xil_printf("*** Error xilsock_send: TCP connections are not supported\n"); |
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286 | return -1; |
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287 | |
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288 | #if 0 |
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289 | struct xilnet_tcp_conn *conn; |
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290 | struct xilsock_socket * sockets = (struct xilsock_socket *)eth_device[eth_dev_num].xilsock_sockets; |
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291 | unsigned char * sendbuf = (unsigned char *)eth_device[eth_dev_num].sendbuf; |
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292 | |
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293 | |
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294 | conn = sockets[s].conn.tcp_conn; |
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295 | |
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296 | if (!conn) { |
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297 | xil_printf("*** Error xilsock_send: no such socket %d \n", conn); |
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298 | return -1; |
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299 | } |
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300 | |
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301 | if (buf != sendbuf) { |
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302 | memset(sendbuf, 0, eth_device[eth_dev_num].buf_size); |
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303 | memcpy(sendbuf+LINK_HDR_LEN+IP_HDR_LEN*4+(TCP_HDR_LEN*4), buf, len); |
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304 | } |
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305 | |
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306 | xilnet_tcp_send_pkt(conn, sendbuf+LINK_HDR_LEN+IP_HDR_LEN*4, len, TCP_ACK, eth_dev_num); |
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307 | xilnet_ip_header(sendbuf+LINK_HDR_LEN, len+(TCP_HDR_LEN*4)+IP_HDR_LEN*4, IP_PROTO_TCP, conn->dst_ip, eth_dev_num); |
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308 | |
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309 | xilnet_eth_send_frame(sendbuf, len+(TCP_HDR_LEN*4)+IP_HDR_LEN*4+ETH_HDR_LEN, conn->dst_ip, NULL, ETH_PROTO_IP, eth_dev_num); |
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310 | |
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311 | return len; |
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312 | #endif |
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313 | } |
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314 | |
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315 | |
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316 | /* |
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317 | * recvfrom socket |
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318 | * Data recvd on any UDP socket |
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319 | * return -1 if data not for socket "s" [non-blocking call] |
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320 | */ |
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321 | int xilsock_recvfrom(int s, unsigned char *buf, unsigned int len, |
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322 | struct sockaddr* from, unsigned int *fromlen, unsigned int eth_dev_num) |
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323 | { |
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324 | int n; |
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325 | int bytes_recvd = 0; |
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326 | struct xilsock_socket * sockets = (struct xilsock_socket *)eth_device[eth_dev_num].xilsock_sockets; |
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327 | struct xilnet_udp_conn * conn = sockets[s].conn.udp_conn; |
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328 | |
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329 | // Check to see if the xilnet driver uses the Ethernet instance |
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330 | if ( !eth_device[eth_dev_num].uses_driver ) { |
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331 | xilsock_print_error_msg( eth_dev_num ); |
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332 | return -1; |
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333 | } |
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334 | |
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335 | if (s > NO_OF_XILSOCKS) { |
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336 | xil_printf("*** Error xilsock_recvfrom: invalid socket descriptor %d \n", s); |
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337 | return -1; |
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338 | } |
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339 | |
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340 | n = xilnet_eth_recv_frame(eth_dev_num); |
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341 | |
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342 | // Return if data not for socket s |
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343 | if ((n < 0 ) || (sockets[s].recvbuf.buf == NULL)) |
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344 | return -1; |
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345 | |
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346 | // Copy data if required onto buf |
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347 | if (sockets[s].recvbuf.buf != buf) |
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348 | { |
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349 | memcpy(buf, sockets[s].recvbuf.buf, len); |
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350 | bytes_recvd = sockets[s].recvbuf.size; |
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351 | |
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352 | //reset socket buffer and size |
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353 | sockets[s].recvbuf.buf = NULL; |
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354 | sockets[s].recvbuf.size = 0; |
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355 | } |
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356 | |
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357 | // Copy the source address onto "to" |
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358 | ((struct sockaddr_in*)from)->sin_addr.s_addr = |
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359 | (conn->dst_ip[0] << 24) + (conn->dst_ip[1] << 16) + (conn->dst_ip[2] << 8) + conn->dst_ip[3]; |
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360 | ((struct sockaddr_in*)from)->sin_port = conn->dst_port; |
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361 | *fromlen = sizeof(from); |
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362 | |
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363 | // return no of bytes recvd for this conn |
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364 | return bytes_recvd; |
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365 | } |
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366 | |
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367 | |
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368 | /* |
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369 | * sendto socket |
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370 | * called from sendto() |
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371 | */ |
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372 | |
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373 | int xilsock_sendto(int s, unsigned char* buf, unsigned int len, struct sockaddr* to, unsigned int eth_dev_num) |
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374 | { |
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375 | |
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376 | struct xilnet_udp_conn * conn; |
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377 | struct xilsock_socket * sockets = (struct xilsock_socket *)eth_device[eth_dev_num].xilsock_sockets; |
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378 | unsigned int dstaddr = ((struct sockaddr_in*)to)->sin_addr.s_addr; |
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379 | unsigned char * sendbuf = buf; |
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380 | |
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381 | // Updated function so that it uses the provided buffer instead of copying the data to the sendbuf of the |
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382 | // given ethernet device. This enables callers to maintain buffers beyond the single send buffer |
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383 | // provided by the Xilnet framework. |
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384 | // |
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385 | // unsigned char * sendbuf = (unsigned char *)eth_device[eth_dev_num].sendbuf; |
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386 | |
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387 | // Check to see if the xilnet driver uses the Ethernet instance |
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388 | if ( !eth_device[eth_dev_num].uses_driver ) { |
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389 | xilsock_print_error_msg( eth_dev_num ); |
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390 | return -1; |
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391 | } |
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392 | |
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393 | conn = sockets[s].conn.udp_conn; |
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394 | conn->dst_ip[0] = (unsigned char) ((dstaddr >> 24) & 0xFF); |
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395 | conn->dst_ip[1] = (unsigned char) ((dstaddr >> 16) & 0xFF); |
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396 | conn->dst_ip[2] = (unsigned char) ((dstaddr >> 8) & 0xFF); |
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397 | conn->dst_ip[3] = (unsigned char) ((dstaddr) & 0xFF); |
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398 | conn->dst_port = ((struct sockaddr_in*)to)->sin_port; |
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399 | |
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400 | if (!conn) { |
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401 | xil_printf("*** Error xilsock_sendto: no such socket %d \n", conn); |
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402 | return -1; |
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403 | } |
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404 | |
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405 | // See comments above. |
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406 | // |
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407 | // if (buf != sendbuf) { |
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408 | // memset(sendbuf, 0, eth_device[eth_dev_num].buf_size); |
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409 | // memcpy(sendbuf+LINK_HDR_LEN+IP_HDR_LEN*4+UDP_HDR_LEN, buf, len); |
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410 | // } |
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411 | |
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412 | // calls to udp stack |
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413 | xilnet_udp_header(conn, sendbuf+LINK_HDR_LEN+IP_HDR_LEN*4, len+UDP_HDR_LEN, eth_dev_num); |
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414 | |
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415 | xilnet_ip_header(sendbuf+LINK_HDR_LEN, len+UDP_HDR_LEN+IP_HDR_LEN*4, IP_PROTO_UDP, conn->dst_ip, eth_dev_num); |
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416 | |
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417 | xilnet_eth_send_frame(sendbuf, len+UDP_HDR_LEN+IP_HDR_LEN*4+ETH_HDR_LEN, conn->dst_ip, NULL, ETH_PROTO_IP, eth_dev_num); |
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418 | |
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419 | return len; |
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420 | } |
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421 | |
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422 | |
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423 | /* |
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424 | * close socket |
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425 | */ |
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426 | |
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427 | void xilsock_close(int s, unsigned int eth_dev_num) { |
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428 | |
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429 | #if 0 |
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430 | unsigned char flags = 0; |
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431 | unsigned short check = 0; |
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432 | unsigned char *tcp_reply; |
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433 | unsigned char * sendbuf = (unsigned char *)eth_device[eth_dev_num].sendbuf; |
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434 | #endif |
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435 | struct xilsock_socket * sockets = (struct xilsock_socket *)eth_device[eth_dev_num].xilsock_sockets; |
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436 | |
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437 | // Check to see if the xilnet driver uses the Ethernet instance |
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438 | if ( !eth_device[eth_dev_num].uses_driver ) { |
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439 | xilsock_print_error_msg( eth_dev_num ); |
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440 | return; |
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441 | } |
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442 | |
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443 | if (sockets[s].type == SOCK_STREAM) { |
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444 | |
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445 | xil_printf("*** Error xilsock_close: TCP connections are not supported\n"); |
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446 | |
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447 | #if 0 |
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448 | struct xilnet_tcp_conn *conn = sockets[s].conn.tcp_conn; |
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449 | |
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450 | // construct the FIN and wait for ack & FIN from client |
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451 | flags = (TCP_FIN | TCP_ACK); |
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452 | ((struct xilnet_tcp_conn*)conn)->state = TCP_FIN_WAIT1; |
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453 | memset(sendbuf, 0, LINK_FRAME_LEN); |
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454 | tcp_reply = sendbuf+ETH_HDR_LEN+(IP_HDR_LEN*4); |
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455 | |
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456 | xilnet_tcp_header(((struct xilnet_tcp_conn*)conn), tcp_reply, 1, flags, eth_dev_num); |
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457 | |
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458 | // calculate tcp checksum |
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459 | check = xilnet_udp_tcp_calc_chksum(tcp_reply, (TCP_HDR_LEN*4), eth_device[eth_dev_num].node_ip_addr, ((struct xilnet_tcp_conn*)conn)->dst_ip, IP_PROTO_TCP); |
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460 | tcp_reply[TCP_CHECK_OFF] = (check & 0xff00) >> 8; |
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461 | tcp_reply[TCP_CHECK_OFF+1] = (check & 0x00ff); |
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462 | |
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463 | xilnet_ip_header(sendbuf+ETH_HDR_LEN,(IP_HDR_LEN*4)+(TCP_HDR_LEN*4), IP_PROTO_TCP, ((struct xilnet_tcp_conn*)conn)->dst_ip, eth_dev_num); |
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464 | xilnet_eth_send_frame(sendbuf, (TCP_HDR_LEN*4)+(IP_HDR_LEN*4)+ETH_HDR_LEN, ((struct xilnet_tcp_conn*)conn)->dst_ip, NULL, ETH_PROTO_IP, eth_dev_num); |
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465 | #endif |
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466 | |
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467 | } |
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468 | else if (sockets[s].type == SOCK_DGRAM) { |
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469 | xilnet_udp_close_conn(sockets[s].conn.udp_conn, eth_dev_num); |
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470 | // close the socket |
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471 | xilsock_rel_socket(s, eth_dev_num); |
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472 | } |
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473 | } |
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