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4578 | mejdrech | 1 | /* |
2 | * Copyright (c) 2009 Lukas Mejdrech |
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3 | * All rights reserved. |
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4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions |
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7 | * are met: |
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8 | * |
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9 | * - Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * - Redistributions in binary form must reproduce the above copyright |
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12 | * notice, this list of conditions and the following disclaimer in the |
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13 | * documentation and/or other materials provided with the distribution. |
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14 | * - The name of the author may not be used to endorse or promote products |
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15 | * derived from this software without specific prior written permission. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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27 | */ |
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28 | |||
29 | /** @addtogroup socket |
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30 | * @{ |
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31 | */ |
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32 | |||
33 | /** @file |
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34 | */ |
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35 | |||
36 | #include "../err.h" |
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37 | |||
38 | #include "../include/in.h" |
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39 | #include "../include/inet.h" |
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40 | |||
41 | #include "../include/socket.h" |
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42 | #include "../include/socket_errno.h" |
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43 | |||
4589 | mejdrech | 44 | #include "../structures/dynamic_fifo.h" |
4578 | mejdrech | 45 | #include "../structures/int_map.h" |
46 | #include "../structures/packet/packet.h" |
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47 | #include "../structures/packet/packet_client.h" |
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48 | |||
49 | #include "socket_core.h" |
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50 | |||
4700 | mejdrech | 51 | int socket_bind_insert( socket_ports_ref global_sockets, socket_core_ref socket, int port ); |
52 | |||
4578 | mejdrech | 53 | INT_MAP_IMPLEMENT( socket_cores, socket_core_t ); |
54 | |||
55 | INT_MAP_IMPLEMENT( socket_ports, socket_core_ref ); |
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56 | |||
4700 | mejdrech | 57 | int socket_bind( socket_cores_ref local_sockets, socket_ports_ref global_sockets, int socket_id, void * addr, size_t addrlen, int free_ports_start, int free_ports_end, int last_used_port ){ |
4578 | mejdrech | 58 | socket_core_ref socket; |
59 | socket_core_ref * socket_pointer; |
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60 | struct sockaddr * address; |
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61 | struct sockaddr_in * address_in; |
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62 | |||
63 | if( addrlen < sizeof( struct sockaddr )) return EINVAL; |
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64 | address = ( struct sockaddr * ) addr; |
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65 | switch( address->sa_family ){ |
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66 | case AF_INET: |
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67 | if( addrlen != sizeof( struct sockaddr_in )) return EINVAL; |
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68 | address_in = ( struct sockaddr_in * ) addr; |
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4589 | mejdrech | 69 | // find the socket |
4578 | mejdrech | 70 | socket = socket_cores_find( local_sockets, socket_id ); |
71 | if( ! socket ) return ENOTSOCK; |
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4700 | mejdrech | 72 | // bind a free port? |
73 | if( address_in->sin_port <= 0 ){ |
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74 | return socket_bind_free_port( global_sockets, socket, free_ports_start, free_ports_end, last_used_port ); |
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75 | } |
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4589 | mejdrech | 76 | // try to find the port |
4578 | mejdrech | 77 | socket_pointer = socket_ports_find( global_sockets, address_in->sin_port ); |
4589 | mejdrech | 78 | if( socket_pointer ){ |
79 | // already used |
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4578 | mejdrech | 80 | return EADDRINUSE; |
81 | } |
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4589 | mejdrech | 82 | // disbind if bound |
4578 | mejdrech | 83 | socket_ports_exclude( global_sockets, socket->port ); |
4700 | mejdrech | 84 | socket->port = -1; |
85 | return socket_bind_insert( global_sockets, socket, address_in->sin_port ); |
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4578 | mejdrech | 86 | break; |
87 | // TODO IPv6 |
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88 | default: |
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89 | return EAFNOSUPPORT; |
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90 | } |
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91 | return EOK; |
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92 | } |
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93 | |||
4700 | mejdrech | 94 | int socket_bind_free_port( socket_ports_ref global_sockets, socket_core_ref socket, int free_ports_start, int free_ports_end, int last_used_port ){ |
95 | int index; |
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96 | |||
97 | // from the last used one |
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98 | index = last_used_port; |
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99 | do{ |
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100 | ++ index; |
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101 | // til the range end |
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102 | if( index >= free_ports_end ){ |
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103 | // start from the range beginning |
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104 | index = free_ports_start - 1; |
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105 | do{ |
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106 | ++ index; |
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107 | // til the last used one |
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108 | if( index >= last_used_port ){ |
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109 | // none found |
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110 | return ENOTCONN; |
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111 | } |
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112 | }while( socket_ports_find( global_sockets, index ) != NULL ); |
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113 | // found, break immediately |
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114 | break; |
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115 | } |
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116 | }while( socket_ports_find( global_sockets, index ) != NULL ); |
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117 | return socket_bind_insert( global_sockets, socket, index ); |
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118 | } |
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119 | |||
120 | int socket_bind_insert( socket_ports_ref global_sockets, socket_core_ref socket, int port ){ |
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121 | ERROR_DECLARE; |
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122 | |||
123 | socket_core_ref * socket_pointer; |
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124 | |||
125 | // create a wrapper |
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126 | socket_pointer = ( socket_core_ref * ) malloc( sizeof( * socket_pointer )); |
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127 | if( ! socket_pointer ) return ENOMEM; |
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128 | * socket_pointer = socket; |
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129 | // register the incomming port |
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130 | ERROR_CODE = socket_ports_add( global_sockets, port, socket_pointer ); |
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131 | if( ERROR_CODE < 0 ){ |
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132 | free( socket_pointer ); |
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133 | return ERROR_CODE; |
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134 | } |
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135 | socket->port = port; |
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136 | return EOK; |
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137 | } |
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138 | |||
4589 | mejdrech | 139 | int socket_create( socket_cores_ref local_sockets, int app_phone, int * socket_id ){ |
140 | ERROR_DECLARE; |
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141 | |||
4578 | mejdrech | 142 | socket_core_ref socket; |
143 | int res; |
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144 | |||
4589 | mejdrech | 145 | if( ! socket_id ) return EBADMEM; |
4578 | mejdrech | 146 | socket = ( socket_core_ref ) malloc( sizeof( * socket )); |
147 | if( ! socket ) return ENOMEM; |
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4589 | mejdrech | 148 | // initialize |
4578 | mejdrech | 149 | socket->phone = app_phone; |
150 | socket->port = -1; |
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151 | socket->device_id = -1; |
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152 | socket->peer_addr = NULL; |
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4589 | mejdrech | 153 | if( ERROR_OCCURRED( dyn_fifo_initialize( & socket->received, SOCKET_INITIAL_RECEIVED_SIZE ))){ |
4578 | mejdrech | 154 | free( socket ); |
4589 | mejdrech | 155 | return ERROR_CODE; |
4578 | mejdrech | 156 | } |
4589 | mejdrech | 157 | if( ERROR_OCCURRED( dyn_fifo_initialize( & socket->accepted, SOCKET_INITIAL_ACCEPTED_SIZE ))){ |
158 | dyn_fifo_destroy( & socket->received ); |
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4578 | mejdrech | 159 | free( socket ); |
4589 | mejdrech | 160 | return ERROR_CODE; |
4578 | mejdrech | 161 | } |
4589 | mejdrech | 162 | // get a next free socket number |
4578 | mejdrech | 163 | socket->socket_id = socket_cores_count( local_sockets ) + 1; |
4589 | mejdrech | 164 | // store the socket |
4578 | mejdrech | 165 | res = socket_cores_add( local_sockets, socket->socket_id, socket ); |
166 | if( res < 0 ){ |
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4589 | mejdrech | 167 | dyn_fifo_destroy( & socket->received ); |
168 | dyn_fifo_destroy( & socket->accepted ); |
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4578 | mejdrech | 169 | free( socket ); |
170 | return res; |
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171 | } |
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4589 | mejdrech | 172 | // return the socket identifier |
173 | * socket_id = socket->socket_id; |
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174 | return EOK; |
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4578 | mejdrech | 175 | } |
176 | |||
177 | int socket_destroy( int packet_phone, int socket_id, socket_cores_ref local_sockets, socket_ports_ref global_sockets ){ |
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178 | socket_core_ref socket; |
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4589 | mejdrech | 179 | int accepted_id; |
180 | int packet_id; |
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4578 | mejdrech | 181 | |
4589 | mejdrech | 182 | // find the socket |
4578 | mejdrech | 183 | socket = socket_cores_find( local_sockets, socket_id ); |
184 | if( ! socket ) return ENOTSOCK; |
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185 | socket_ports_exclude( global_sockets, socket->port ); |
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4589 | mejdrech | 186 | // destroy all accepted sockets |
4603 | mejdrech | 187 | while(( accepted_id = dyn_fifo_pop( & socket->accepted )) >= 0 ){ |
4589 | mejdrech | 188 | socket_destroy( packet_phone, accepted_id, local_sockets, global_sockets ); |
4578 | mejdrech | 189 | } |
4589 | mejdrech | 190 | // release all received packets |
4603 | mejdrech | 191 | while(( packet_id = dyn_fifo_pop( & socket->received )) >= 0 ){ |
4589 | mejdrech | 192 | pq_release( packet_phone, packet_id ); |
4578 | mejdrech | 193 | } |
4589 | mejdrech | 194 | dyn_fifo_destroy( & socket->received ); |
195 | dyn_fifo_destroy( & socket->accepted ); |
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4578 | mejdrech | 196 | socket_cores_exclude( local_sockets, socket_id ); |
197 | return EOK; |
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198 | } |
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199 | |||
200 | /** @} |
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201 | */ |