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