Rev 4731 | Go to most recent revision | Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
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| 4726 | mejdrech | 1 | /* |
| 2 | * Copyright (c) 2008 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 net_tl |
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| 30 | * @{ |
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| 31 | */ |
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| 32 | |||
| 33 | /** @file |
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| 34 | * Transport layer common functions implementation. |
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| 35 | * @see tl_common.h |
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| 36 | */ |
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| 37 | |||
| 38 | #include <async.h> |
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| 39 | #include <ipc/services.h> |
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| 40 | |||
| 41 | #include "../err.h" |
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| 42 | |||
| 43 | #include "../structures/packet/packet.h" |
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| 44 | #include "../structures/packet/packet_client.h" |
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| 45 | |||
| 46 | #include "../include/icmp_interface.h" |
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| 47 | #include "../include/in.h" |
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| 48 | #include "../include/in6.h" |
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| 49 | #include "../include/inet.h" |
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| 50 | #include "../include/socket_codes.h" |
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| 51 | #include "../include/socket_errno.h" |
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| 52 | |||
| 53 | #include "tl_common.h" |
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| 54 | |||
| 55 | int tl_get_address_port( const struct sockaddr * addr, int addrlen, uint16_t * port ){ |
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| 56 | const struct sockaddr_in * address_in; |
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| 57 | const struct sockaddr_in6 * address_in6; |
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| 58 | |||
| 59 | if( addrlen < sizeof( struct sockaddr )) return EINVAL; |
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| 60 | switch( addr->sa_family ){ |
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| 61 | case AF_INET: |
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| 62 | if( addrlen != sizeof( struct sockaddr_in )) return EINVAL; |
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| 63 | address_in = ( struct sockaddr_in * ) addr; |
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| 64 | * port = address_in->sin_port; |
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| 65 | break; |
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| 66 | case AF_INET6: |
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| 67 | if( addrlen != sizeof( struct sockaddr_in6 )) return EINVAL; |
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| 68 | address_in6 = ( struct sockaddr_in6 * ) addr; |
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| 69 | * port = address_in6->sin6_port; |
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| 70 | break; |
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| 71 | default: |
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| 72 | return EAFNOSUPPORT; |
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| 73 | } |
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| 74 | return EOK; |
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| 75 | } |
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| 76 | |||
| 77 | |||
| 78 | int tl_set_address_port( struct sockaddr * addr, int addrlen, uint16_t port ){ |
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| 79 | struct sockaddr_in * address_in; |
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| 80 | struct sockaddr_in6 * address_in6; |
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| 81 | size_t length; |
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| 82 | |||
| 83 | if( addrlen < 0 ) return EINVAL; |
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| 84 | length = ( size_t ) addrlen; |
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| 85 | if( length < sizeof( struct sockaddr )) return EINVAL; |
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| 86 | switch( addr->sa_family ){ |
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| 87 | case AF_INET: |
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| 88 | if( length != sizeof( struct sockaddr_in )) return EINVAL; |
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| 89 | address_in = ( struct sockaddr_in * ) addr; |
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| 90 | address_in->sin_port = port; |
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| 91 | return EOK; |
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| 92 | case AF_INET6: |
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| 93 | if( length != sizeof( struct sockaddr_in6 )) return EINVAL; |
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| 94 | address_in6 = ( struct sockaddr_in6 * ) addr; |
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| 95 | address_in6->sin6_port = port; |
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| 96 | return EOK; |
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| 97 | default: |
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| 98 | return EAFNOSUPPORT; |
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| 99 | } |
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| 100 | } |
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| 101 | |||
| 102 | void tl_send_icmp_port_unreachable( int packet_phone, int icmp_phone, packet_t packet, services_t error ){ |
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| 103 | packet_t next; |
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| 104 | uint8_t * src; |
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| 105 | int length; |
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| 106 | |||
| 107 | // detach the first packet and release the others |
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| 108 | next = pq_detach( packet ); |
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| 109 | if( next ){ |
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| 110 | pq_release( packet_phone, packet_get_id( next )); |
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| 111 | } |
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| 112 | length = packet_get_addr( packet, & src, NULL ); |
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| 113 | if(( length > 0 ) |
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| 114 | && ( ! error ) |
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| 115 | && ( icmp_phone >= 0 ) |
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| 116 | // set both addresses to the source one (avoids the source address deletion before setting the destination one) |
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| 117 | && ( packet_set_addr( packet, src, src, ( size_t ) length ) == EOK )){ |
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| 118 | icmp_destination_unreachable_msg( icmp_phone, ICMP_PORT_UNREACH, 0, packet ); |
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| 119 | }else{ |
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| 120 | pq_release( packet_phone, packet_get_id( packet )); |
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| 121 | } |
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| 122 | } |
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| 123 | |||
| 124 | int tl_socket_read_packet_data( int packet_phone, packet_ref packet, size_t prefix, const packet_dimension_ref dimension, const struct sockaddr * addr, socklen_t addrlen ){ |
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| 125 | ERROR_DECLARE; |
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| 126 | |||
| 127 | ipc_callid_t callid; |
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| 128 | size_t length; |
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| 129 | void * data; |
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| 130 | |||
| 131 | if( ! dimension ) return EINVAL; |
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| 132 | // get the data length |
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| 133 | if( ! ipc_data_write_receive( & callid, & length )) return EINVAL; |
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| 134 | // get a new packet |
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| 135 | * packet = packet_get_4( packet_phone, length, dimension->addr_len, prefix + dimension->prefix, dimension->suffix ); |
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| 136 | if( ! packet ) return ENOMEM; |
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| 137 | // allocate space in the packet |
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| 138 | data = packet_suffix( * packet, length ); |
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| 139 | if( ! data ){ |
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| 140 | pq_release( packet_phone, packet_get_id( * packet )); |
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| 141 | return ENOMEM; |
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| 142 | } |
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| 143 | // read the data into the packet |
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| 144 | if( ERROR_OCCURRED( ipc_data_write_finalize( callid, data, length )) |
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| 145 | // set the packet destination address |
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| 146 | || ERROR_OCCURRED( packet_set_addr( * packet, NULL, ( uint8_t * ) addr, addrlen ))){ |
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| 147 | pq_release( packet_phone, packet_get_id( * packet )); |
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| 148 | return ERROR_CODE; |
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| 149 | } |
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| 150 | return ( int ) length; |
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| 151 | } |
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| 152 | |||
| 153 | /** @} |
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| 154 | */ |