[0] | 1 | //socket.c: |
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| 2 | |
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| 3 | #include "libroar.h" |
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| 4 | |
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[81] | 5 | #define MODE_LISTEN ROAR_SOCKET_MODE_LISTEN |
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| 6 | #define MODE_CONNECT ROAR_SOCKET_MODE_CONNECT |
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[0] | 7 | |
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| 8 | int roar_socket_new_tcp (void) { |
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| 9 | int fh; |
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[234] | 10 | int opt = IPTOS_LOWDELAY; |
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[0] | 11 | |
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| 12 | fh = socket(PF_INET, SOCK_STREAM, 0); |
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| 13 | |
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[234] | 14 | setsockopt(fh, IPPROTO_IP, IP_TOS, &opt, sizeof(int)); |
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| 15 | |
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[0] | 16 | return fh; |
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| 17 | } |
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| 18 | |
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[374] | 19 | int roar_socket_new_udp (void) { |
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| 20 | int fh; |
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| 21 | int opt = IPTOS_LOWDELAY; |
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| 22 | |
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| 23 | fh = socket(PF_INET, SOCK_DGRAM, 0); |
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| 24 | |
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| 25 | setsockopt(fh, IPPROTO_IP, IP_TOS, &opt, sizeof(int)); |
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| 26 | |
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| 27 | return fh; |
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| 28 | } |
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| 29 | |
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[509] | 30 | int roar_socket_new_tcp6 (void) { |
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| 31 | #ifdef PF_INET6 |
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| 32 | int fh; |
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| 33 | int opt = IPTOS_LOWDELAY; |
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| 34 | |
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| 35 | fh = socket(PF_INET6, SOCK_STREAM, 0); |
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| 36 | |
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| 37 | setsockopt(fh, IPPROTO_IP, IP_TOS, &opt, sizeof(int)); |
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| 38 | |
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| 39 | return fh; |
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| 40 | #else |
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| 41 | return -1; |
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| 42 | #endif |
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| 43 | } |
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| 44 | |
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| 45 | int roar_socket_new_udp6 (void) { |
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| 46 | #ifdef PF_INET6 |
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| 47 | int fh; |
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| 48 | int opt = IPTOS_LOWDELAY; |
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| 49 | |
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| 50 | fh = socket(PF_INET6, SOCK_DGRAM, 0); |
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| 51 | |
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| 52 | setsockopt(fh, IPPROTO_IP, IP_TOS, &opt, sizeof(int)); |
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| 53 | |
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| 54 | return fh; |
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| 55 | #else |
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| 56 | return -1; |
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| 57 | #endif |
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| 58 | } |
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| 59 | |
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[0] | 60 | int roar_socket_new_unix (void) { |
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| 61 | int fh; |
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[442] | 62 | #ifdef SO_PEERCRED |
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| 63 | int opt = 1; |
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| 64 | #endif |
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[0] | 65 | |
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| 66 | fh = socket(AF_UNIX, SOCK_STREAM, 0); |
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| 67 | |
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[442] | 68 | #ifdef SO_PEERCRED |
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| 69 | setsockopt(fh, SOL_SOCKET, SO_PASSCRED, &opt, sizeof(int)); |
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| 70 | #endif |
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| 71 | |
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[0] | 72 | return fh; |
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| 73 | } |
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| 74 | |
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[508] | 75 | int roar_socket_new_decnet_seqpacket (void) { |
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| 76 | #ifdef ROAR_HAVE_LIBDNET |
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| 77 | int fh; |
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| 78 | |
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| 79 | fh = socket(AF_DECnet, SOCK_SEQPACKET, DNPROTO_NSP); |
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| 80 | |
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| 81 | return fh; |
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| 82 | #else |
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| 83 | return -1; |
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| 84 | #endif |
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| 85 | } |
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| 86 | |
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| 87 | |
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| 88 | int roar_socket_new_decnet_stream (void) { |
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| 89 | #ifdef ROAR_HAVE_LIBDNET |
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| 90 | int fh; |
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| 91 | |
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| 92 | fh = socket(AF_DECnet, SOCK_STREAM, DNPROTO_NSP); |
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| 93 | |
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| 94 | return fh; |
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| 95 | #else |
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| 96 | return -1; |
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| 97 | #endif |
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| 98 | } |
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| 99 | |
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| 100 | |
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[0] | 101 | int roar_socket_nonblock(int fh, int state) { |
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| 102 | int flags; |
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| 103 | |
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| 104 | if ( (flags = fcntl(fh, F_GETFL, 0)) == -1 ) { |
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| 105 | ROAR_ERR("roar_socket_nonblock(fh=%i, state=%i): Can not read flags: %s", fh, state, strerror(errno)); |
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| 106 | ROAR_DBG("roar_socket_nonblock(fh=%i, state=%i) = -1", fh, state); |
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| 107 | return -1; |
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| 108 | } |
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| 109 | |
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| 110 | flags |= O_NONBLOCK; |
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| 111 | |
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| 112 | if ( state == ROAR_SOCKET_BLOCK ) |
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| 113 | flags -= O_NONBLOCK; |
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| 114 | |
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| 115 | if ( fcntl(fh, F_SETFL, flags) == -1 ) { |
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| 116 | ROAR_ERR("roar_socket_nonblock(fh=%i, state=%i): Can not set flags: %s", fh, state, strerror(errno)); |
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| 117 | ROAR_DBG("roar_socket_nonblock(fh=%i, state=%i) = -1", fh, state); |
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| 118 | return -1; |
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| 119 | } |
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| 120 | |
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| 121 | ROAR_DBG("roar_socket_nonblock(fh=%i, state=%i) = 0", fh, state); |
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| 122 | return 0; |
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| 123 | } |
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| 124 | |
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[375] | 125 | int roar_socket_dup_udp_local_end (int fh) { |
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[376] | 126 | int n = -1; |
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| 127 | int flags = -1; |
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| 128 | struct sockaddr_in socket_addr; |
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| 129 | socklen_t len = sizeof(struct sockaddr_in); |
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| 130 | |
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| 131 | if ( (flags = fcntl(fh, F_GETFL, 0)) == -1 ) { |
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| 132 | ROAR_WARN("roar_socket_dup_udp_local_end(fh=%i): Can not read flags: %s", fh, strerror(errno)); |
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| 133 | } |
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| 134 | |
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| 135 | if ( getsockname(fh, (struct sockaddr *)&socket_addr, &len) == -1 ) { |
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| 136 | return -1; |
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| 137 | } |
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| 138 | |
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| 139 | if ( socket_addr.sin_family != AF_INET ) { |
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| 140 | return -1; |
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| 141 | } |
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| 142 | |
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| 143 | n = roar_socket_new_udp(); |
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| 144 | |
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| 145 | if ( n == -1 ) |
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| 146 | return -1; |
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| 147 | |
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| 148 | // if ( mode_func(fh, (struct sockaddr *)&socket_addr, sizeof(struct sockaddr_in)) == -1 ) { |
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| 149 | if ( bind(n, (struct sockaddr *)&socket_addr, len) == -1 ) { |
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| 150 | close(n); |
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| 151 | return -1; |
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| 152 | } |
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| 153 | |
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| 154 | if ( flags != -1 ) { |
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| 155 | if ( fcntl(fh, F_SETFL, flags) == -1 ) { |
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| 156 | ROAR_WARN("roar_socket_dup_udp_local_end(fh=%i): Can not set flags: %s", fh, strerror(errno)); |
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| 157 | return -1; |
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| 158 | } |
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| 159 | } |
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| 160 | |
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| 161 | |
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| 162 | return n; |
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[375] | 163 | } |
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| 164 | |
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[0] | 165 | int roar_socket_listen (int type, char * host, int port) { |
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| 166 | return roar_socket_open(MODE_LISTEN, type, host, port); |
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| 167 | } |
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| 168 | |
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| 169 | int roar_socket_connect (char * host, int port) { |
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[2] | 170 | char * proxy_type = getenv("ROAR_PROXY"); |
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| 171 | |
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| 172 | if ( proxy_type == NULL || strcmp(proxy_type, "") == 0 ) { |
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| 173 | return roar_socket_open(MODE_CONNECT, ROAR_SOCKET_TYPE_UNKNOWN, host, port); |
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| 174 | } else { |
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| 175 | return roar_socket_open_proxy(MODE_CONNECT, ROAR_SOCKET_TYPE_UNKNOWN, host, port, proxy_type); |
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| 176 | } |
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[0] | 177 | } |
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| 178 | |
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[508] | 179 | |
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| 180 | int roar_socket_listen_decnet (char * object, int num) { |
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| 181 | #ifdef ROAR_HAVE_LIBDNET |
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| 182 | int fh = roar_socket_new_decnet_stream(); |
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| 183 | struct sockaddr_dn bind_sockaddr; |
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| 184 | |
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| 185 | if ( fh == -1 ) |
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| 186 | return -1; |
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| 187 | |
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| 188 | if ( !*object ) |
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| 189 | object = NULL; |
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| 190 | |
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| 191 | if ( (object && num) || (!*object && !num) ) { |
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| 192 | ROAR_WARN("roar_socket_listen_decnet(object='%s', num=%i): illegal address!", object, num); |
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| 193 | close(fh); |
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| 194 | return -1; |
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| 195 | } |
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| 196 | |
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| 197 | memset((void*)&bind_sockaddr, 0, sizeof(struct sockaddr_dn)); |
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| 198 | |
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| 199 | bind_sockaddr.sdn_family = AF_DECnet; |
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| 200 | bind_sockaddr.sdn_flags = 0; |
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| 201 | bind_sockaddr.sdn_objnum = num; |
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| 202 | |
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| 203 | if ( num ) { |
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| 204 | bind_sockaddr.sdn_objnamel = 0; |
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| 205 | } else { |
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| 206 | bind_sockaddr.sdn_objnamel = ROAR_dn_htons(strlen(object)); |
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| 207 | strcpy((char*)bind_sockaddr.sdn_objname, object); // FIXME: shouldn't we use strncpy()? |
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| 208 | } |
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| 209 | |
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| 210 | if ( bind(fh, (struct sockaddr *) &bind_sockaddr, sizeof(bind_sockaddr)) == -1 ) { |
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| 211 | close(fh); |
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| 212 | return -1; |
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| 213 | } |
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| 214 | |
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| 215 | if ( listen(fh, 8) == -1 ) { |
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| 216 | close(fh); |
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| 217 | return -1; |
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| 218 | } |
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| 219 | |
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| 220 | return fh; |
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| 221 | #else |
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| 222 | return -1; |
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| 223 | #endif |
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| 224 | } |
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| 225 | |
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[0] | 226 | int roar_socket_open (int mode, int type, char * host, int port) { |
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| 227 | // int type = ROAR_SOCKET_TYPE_INET; |
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| 228 | int fh; |
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[512] | 229 | union { |
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| 230 | struct sockaddr_in in; |
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| 231 | struct sockaddr_un un; |
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[514] | 232 | struct sockaddr_in6 in6; |
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[512] | 233 | } socket_addr; |
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[0] | 234 | struct hostent * he; |
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| 235 | //unsigned int host_div = 0; |
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| 236 | int (*mode_func)(int sockfd, const struct sockaddr *serv_addr, socklen_t addrlen) = connect; // default is to connect |
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[501] | 237 | #ifdef ROAR_HAVE_LIBDNET |
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| 238 | char obj[80]; |
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| 239 | char * del; |
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| 240 | #endif |
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[0] | 241 | |
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| 242 | if ( mode == MODE_LISTEN ) |
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| 243 | mode_func = bind; |
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| 244 | |
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| 245 | if ( type == ROAR_SOCKET_TYPE_UNKNOWN ) { |
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| 246 | type = ROAR_SOCKET_TYPE_INET; |
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[69] | 247 | if ( *host == '/' ) { |
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[0] | 248 | type = ROAR_SOCKET_TYPE_UNIX; |
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[69] | 249 | } else if ( strcmp(host, "+fork") == 0 ) { |
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| 250 | type = ROAR_SOCKET_TYPE_FORK; |
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[501] | 251 | } else if ( strstr(host, "::") != NULL ) { |
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| 252 | type = ROAR_SOCKET_TYPE_DECNET; |
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[69] | 253 | } |
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[0] | 254 | } |
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| 255 | |
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| 256 | |
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| 257 | ROAR_DBG("roar_socket_open(*): type=%s, host='%s', port=%i", |
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| 258 | type == ROAR_SOCKET_TYPE_UNIX ? "UNIX" : "INET", host, port); |
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| 259 | |
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[501] | 260 | if ( type == ROAR_SOCKET_TYPE_DECNET ) { |
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| 261 | #ifdef ROAR_HAVE_LIBDNET |
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[508] | 262 | ROAR_DBG("roar_socket_open(*): hostname for DECnet: host(%p)=%s", host, host); |
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[501] | 263 | del = strstr(host, "::"); |
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[508] | 264 | ROAR_DBG("roar_socket_open(*): hostname for DECnet: del(%p)=%s", del, del); |
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| 265 | |
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| 266 | if ( del == NULL ) { |
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| 267 | ROAR_WARN("roar_socket_open(*): invalid hostname for DECnet: %s", host); |
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| 268 | return -1; |
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| 269 | } |
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| 270 | |
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[501] | 271 | *del = 0; |
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| 272 | |
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| 273 | if ( *(del+2) == '#' ) { // assume we have node::#num |
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| 274 | port = atoi(del+2); |
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| 275 | } |
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| 276 | |
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| 277 | if ( port ) { |
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| 278 | sprintf(obj, "%i", port); // no need for snprintf() as dec(port) is smaller than obj[] |
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| 279 | } else { |
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| 280 | *obj = 0; |
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| 281 | strncat(obj, del+2, 79); |
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| 282 | } |
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| 283 | |
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[508] | 284 | if ( mode == MODE_LISTEN ) { |
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| 285 | fh = roar_socket_listen_decnet(obj, port); |
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| 286 | *del = ':'; |
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| 287 | return fh; |
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| 288 | // return -1; // listen sockets on DECnet are not supportet at the moment |
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| 289 | } else { |
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| 290 | // There is nothing wrong in this case to use dnet_conn() so we do. |
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[501] | 291 | fh = dnet_conn(host, obj, SOCK_STREAM, 0 ,0 ,0 , 0); |
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| 292 | *del = ':'; |
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| 293 | return fh; |
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| 294 | #else |
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| 295 | return -1; // no decnet support |
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| 296 | #endif |
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| 297 | } |
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| 298 | } |
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| 299 | |
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[512] | 300 | memset(&socket_addr, 0, sizeof(socket_addr)); |
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[60] | 301 | memset(&he, 0, sizeof(he)); // FIXME: we have a valid pointer in here???? |
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[0] | 302 | |
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| 303 | |
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| 304 | if ( type == ROAR_SOCKET_TYPE_INET ) { |
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| 305 | |
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| 306 | if ( (he = gethostbyname(host)) == NULL ) { |
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| 307 | ROAR_ERR("roar_socket_open(*): Can\'t resolve host name '%s'", |
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| 308 | host); |
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| 309 | return -1; |
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| 310 | } |
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| 311 | |
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[512] | 312 | memcpy((struct in_addr *)&socket_addr.in.sin_addr, he->h_addr, sizeof(struct in_addr)); |
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[0] | 313 | |
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| 314 | /* set the connect information */ |
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[512] | 315 | socket_addr.in.sin_family = AF_INET; |
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| 316 | socket_addr.in.sin_port = htons( port ); |
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[0] | 317 | |
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| 318 | fh = roar_socket_new_tcp(); |
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| 319 | |
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[512] | 320 | if ( mode_func(fh, (struct sockaddr *)&socket_addr.in, sizeof(struct sockaddr_in)) == -1 ) { |
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[0] | 321 | ROAR_DBG("roar_socket_open(*): Can not connect/bind: %s", strerror(errno)); |
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| 322 | close(fh); |
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| 323 | return -1; |
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| 324 | } |
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| 325 | // hey! we have a socket... |
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[69] | 326 | } else if ( type == ROAR_SOCKET_TYPE_UNIX ) { |
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[512] | 327 | socket_addr.un.sun_family = AF_UNIX; |
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| 328 | strncpy(socket_addr.un.sun_path, host, sizeof(socket_addr.un.sun_path) - 1); |
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[60] | 329 | |
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[0] | 330 | fh = roar_socket_new_unix(); |
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[60] | 331 | |
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[512] | 332 | if ( mode_func(fh, (struct sockaddr *)&socket_addr.un, sizeof(struct sockaddr_un)) == -1 ) { |
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[60] | 333 | ROAR_DBG("roar_socket_open(*): Can not connect/bind: %s", strerror(errno)); |
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| 334 | close(fh); |
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| 335 | return -1; |
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| 336 | } |
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[514] | 337 | } else if ( type == ROAR_SOCKET_TYPE_INET6 ) { |
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| 338 | return -1; |
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[69] | 339 | } else if ( type == ROAR_SOCKET_TYPE_FORK ) { |
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| 340 | return roar_socket_open_fork(mode, host, port); |
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[75] | 341 | } else if ( type == ROAR_SOCKET_TYPE_FILE ) { |
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| 342 | return roar_socket_open_file(mode, host, port); |
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[69] | 343 | } else { |
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| 344 | return -1; |
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[0] | 345 | } |
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| 346 | |
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| 347 | if ( mode == MODE_LISTEN ) |
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| 348 | if ( listen(fh, ROAR_SOCKET_QUEUE_LEN) == -1 ) { |
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| 349 | close(fh); |
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| 350 | return -1; |
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| 351 | } |
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| 352 | |
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| 353 | return fh; |
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| 354 | } |
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| 355 | |
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[69] | 356 | int roar_socket_open_fork (int mode, char * host, int port) { |
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| 357 | int socks[2]; |
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| 358 | int r; |
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| 359 | char fhstr[8]; |
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| 360 | |
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| 361 | if ( mode == MODE_LISTEN ) |
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| 362 | return -1; |
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| 363 | |
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| 364 | if ( socketpair(AF_UNIX, SOCK_STREAM, 0, socks) == -1 ) { |
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| 365 | return -1; |
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| 366 | } |
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| 367 | |
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| 368 | r = fork(); |
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| 369 | |
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| 370 | if ( r == -1 ) { // error! |
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| 371 | ROAR_ERR("roar_socket_open_fork(*): Can not fork: %s", strerror(errno)); |
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| 372 | close(socks[0]); |
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| 373 | close(socks[1]); |
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| 374 | return -1; |
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| 375 | } else if ( r == 0 ) { // we are the child |
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| 376 | close(socks[0]); |
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| 377 | |
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[70] | 378 | close(ROAR_STDIN ); // we do not want roard to have any standard input |
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| 379 | close(ROAR_STDOUT); // STDOUT is also not needed, so we close it, |
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| 380 | // but STDERR we keep open for error messages. |
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| 381 | |
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[69] | 382 | snprintf(fhstr, 7, "%i", socks[1]); |
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| 383 | |
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[71] | 384 | execlp("roard", "roard", "--terminate", "--no-listen", "--client-fh", fhstr, NULL); |
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[69] | 385 | |
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| 386 | // we are still alive? |
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| 387 | ROAR_ERR("roar_socket_open_fork(*): alive after exec(), that's bad!"); |
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| 388 | _exit(1); |
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| 389 | } else { // we are the parent |
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| 390 | close(socks[1]); |
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| 391 | return socks[0]; |
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| 392 | } |
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| 393 | |
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| 394 | return -1; |
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| 395 | } |
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| 396 | |
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[75] | 397 | int roar_socket_open_file (int mode, char * host, int port) { |
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| 398 | int fh; |
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| 399 | |
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| 400 | if ( mode == MODE_LISTEN ) |
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| 401 | return -1; |
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| 402 | |
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| 403 | if ( (fh = open(host, O_RDONLY, 0644)) == -1 ) { |
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| 404 | ROAR_ERR("roar_socket_open_file(*): Can not open file %s: %s", host, strerror(errno)); |
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| 405 | } |
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| 406 | |
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| 407 | return fh; |
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| 408 | } |
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| 409 | |
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[2] | 410 | // --- [ PROXY CODE ] --- |
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| 411 | |
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| 412 | // generic proxy code: |
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| 413 | |
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| 414 | int roar_socket_open_proxy (int mode, int type, char * host, int port, char * proxy_type) { |
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| 415 | int proxy_port; |
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| 416 | char proxy_host[ROAR_SOCKET_MAX_HOSTNAMELEN]; |
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| 417 | char * proxy_addr; |
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| 418 | int i; |
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| 419 | int fh; |
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| 420 | |
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| 421 | // TODO: change this so we support listen() proxys (ssh -R) |
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| 422 | if ( mode != MODE_CONNECT ) |
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| 423 | return -1; |
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| 424 | |
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| 425 | if ( !strcmp(proxy_type, "socks4a") ) { // for TOR, the only supported type at the moment |
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| 426 | proxy_addr = getenv("socks_proxy"); |
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| 427 | |
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| 428 | proxy_port = 9050; // TOR's default port |
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| 429 | |
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| 430 | if ( proxy_addr == NULL ) |
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| 431 | return -1; |
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| 432 | |
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| 433 | for (i = 0; proxy_addr[i] != 0 && proxy_addr[i] != ':' && i < ROAR_SOCKET_MAX_HOSTNAMELEN; i++) |
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| 434 | proxy_host[i] = proxy_addr[i]; |
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| 435 | proxy_host[i] = 0; |
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| 436 | |
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| 437 | if ( i == 0 ) // no hostname found |
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| 438 | return -1; |
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| 439 | |
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| 440 | if ( proxy_addr[i] == ':' ) |
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| 441 | proxy_port = atoi(&proxy_addr[i+1]); |
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| 442 | |
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| 443 | if ( (fh = roar_socket_open(mode, type, proxy_host, proxy_port)) == -1) { |
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| 444 | return -1; |
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| 445 | } |
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| 446 | |
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| 447 | if ( roar_socket_open_socks4a(mode, fh, host, port) == -1 ) { |
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| 448 | close(fh); |
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| 449 | return -1; |
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| 450 | } |
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| 451 | |
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| 452 | return fh; |
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| 453 | } else { |
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| 454 | return -1; // unknown type |
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| 455 | } |
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| 456 | } |
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| 457 | |
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| 458 | // protocoll dependet proxy code: |
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| 459 | |
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| 460 | int roar_socket_open_socks4a(int mode, int fh, char * host, int port) { |
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| 461 | char buf[9]; |
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| 462 | int len; |
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| 463 | |
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| 464 | buf[0] = 0x04; |
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| 465 | buf[1] = mode == MODE_CONNECT ? 0x01 : 0x02; |
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| 466 | *((uint16_t*)&buf[2]) = htons(port); |
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| 467 | buf[4] = 0x00; |
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| 468 | buf[5] = 0x00; |
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| 469 | buf[6] = 0x00; |
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| 470 | buf[7] = 0x01; |
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| 471 | buf[8] = 0x00; |
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| 472 | |
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| 473 | if ( write(fh, buf, 9) != 9 ) |
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| 474 | return -1; |
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| 475 | |
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| 476 | len = strlen(host); |
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| 477 | |
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| 478 | if ( write(fh, host, len) != len ) |
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| 479 | return -1; |
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| 480 | |
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| 481 | if ( write(fh, "\0", 1) != 1 ) |
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| 482 | return -1; |
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| 483 | |
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| 484 | if ( read(fh, buf, 8) != 8 ) |
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| 485 | return -1; |
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| 486 | |
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| 487 | if ( buf[1] != 0x5a ) |
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| 488 | return -1; |
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| 489 | |
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| 490 | return 0; |
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| 491 | } |
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| 492 | |
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[0] | 493 | //ll |
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