[260] | 1 | #include "server.h" |
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| 2 | #include "xmpp.h" |
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| 3 | |
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| 4 | #define HOST "im.celepar.parana" |
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| 5 | #define IP "10.15.20.219" |
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| 6 | #define PORT "5222" |
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| 7 | |
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| 8 | int tls = 0; |
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| 9 | |
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| 10 | void Read(void * fd, void *buf, int count) |
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| 11 | { |
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| 12 | bzero(buf, count); |
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| 13 | if ( tls == 0 ) |
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| 14 | read(*(int *) fd, buf, (ssize_t)count); |
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| 15 | else |
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| 16 | SSL_read((SSL *) fd, buf, count); |
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| 17 | } |
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| 18 | |
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| 19 | void Write(void * fd, void *buf, int count) |
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| 20 | { |
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| 21 | if ( tls == 0 ) |
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| 22 | write(*(int *) fd, buf, (ssize_t)count); |
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| 23 | else |
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| 24 | SSL_write((SSL *) fd, buf, count); |
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| 25 | } |
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| 26 | |
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| 27 | int main(int argc, char ** argv) |
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| 28 | { |
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| 29 | /* variables to parse arguments */ |
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| 30 | extern int optind, |
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| 31 | optopt; |
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| 32 | extern char * optarg; |
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| 33 | |
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| 34 | char * log_file; |
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| 35 | int c = (int)NULL, |
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| 36 | errflg = (int)NULL, |
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| 37 | verbose = (int)NULL, |
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| 38 | optval = 1; |
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| 39 | |
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| 40 | socklen_t optlen = sizeof(optval); |
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| 41 | |
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| 42 | /* fd -> file descriptor */ |
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| 43 | int socket_server_fd = (int)NULL, |
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| 44 | socket_server_port = (int)NULL, |
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| 45 | socket_accept_fd = (int)NULL, |
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| 46 | sockaddr_in_size = sizeof(struct sockaddr_in), |
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| 47 | err = (int)NULL; |
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| 48 | |
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| 49 | /* Internet socket address stuct */ |
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| 50 | struct sockaddr_in server_addr, |
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| 51 | accept_addr; |
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| 52 | |
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| 53 | struct client * clients = (struct client *) NULL, |
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| 54 | * current = (struct client *) NULL; |
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| 55 | |
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| 56 | pthread_t threads; |
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| 57 | |
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| 58 | /* clear screen */ |
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| 59 | system(__CLEAR_SCREEN__); |
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| 60 | |
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| 61 | while ( (c = getopt(argc, argv, ":vp:")) != -1 ) |
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| 62 | { |
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| 63 | switch ( c ) |
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| 64 | { |
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| 65 | case 'p': |
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| 66 | if ( socket_server_port = strtol(optarg, 0, 10) == 0 ) |
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| 67 | { |
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| 68 | fprintf(stderr, "Option -%c requires a valid port and '%s' isn't valid\n", optopt, optarg); |
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| 69 | ++errflg; |
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| 70 | } |
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| 71 | break; |
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| 72 | case 'v': |
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| 73 | verbose = 1; |
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| 74 | break; |
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| 75 | case ':': |
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| 76 | /* -f or -o without operand */ |
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| 77 | fprintf(stderr, "Option -%c requires an operand\n", optopt); |
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| 78 | ++errflg; |
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| 79 | break; |
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| 80 | case '?': |
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| 81 | fprintf(stderr, "Unrecognized option: -%c\n", optopt); |
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| 82 | ++errflg; |
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| 83 | } |
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| 84 | } |
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| 85 | if ( errflg ) |
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| 86 | { |
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| 87 | fprintf(stderr, "usage: . . . \n\n"); |
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| 88 | exit(2); |
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| 89 | } |
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| 90 | |
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| 91 | /* make a socket */ |
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| 92 | int one = 1; |
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| 93 | socket_server_fd = socket(AF_INET, SOCK_STREAM, 0); |
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| 94 | if ( socket_server_fd == __SOCKET_ERROR__ ) |
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| 95 | { |
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| 96 | printf("\nCould not make a socket\n"); |
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| 97 | return 0; |
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| 98 | } |
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| 99 | |
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| 100 | bzero((char *) &server_addr, sockaddr_in_size); |
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| 101 | bzero((char *) &accept_addr, sockaddr_in_size); |
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| 102 | |
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| 103 | if ( !socket_server_port ) |
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| 104 | socket_server_port = __DEFAULT_OPEN_PORT__; |
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| 105 | |
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| 106 | /* fill address struct */ |
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| 107 | server_addr.sin_addr.s_addr = INADDR_ANY; |
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| 108 | server_addr.sin_port = htons(socket_server_port); |
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| 109 | server_addr.sin_family = AF_INET; |
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| 110 | bzero(&(server_addr.sin_zero), 8); |
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| 111 | |
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| 112 | if ( __DEBUG__ || verbose ) |
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| 113 | printf("\nBinding to port %d...\n", socket_server_port); |
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| 114 | |
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| 115 | /* bind to a port */ |
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| 116 | if ( bind(socket_server_fd, (struct sockaddr *)&(server_addr), sizeof(server_addr)) == __SOCKET_ERROR__ ) |
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| 117 | { |
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| 118 | printf("\nCould not connect to host\n"); |
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| 119 | exit(1); |
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| 120 | } |
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| 121 | |
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| 122 | /* get port number */ |
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| 123 | getsockname(socket_server_fd, (struct sockaddr *)&(server_addr), (socklen_t *) &(sockaddr_in_size)); |
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| 124 | if ( __DEBUG__ || verbose ) |
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| 125 | { |
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| 126 | printf("\nopened socket as fd (%d) on port (%d) for stream i/o\n", socket_server_fd, ntohs(server_addr.sin_port)); |
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| 127 | |
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| 128 | printf("Server\n\ |
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| 129 | sin_family = %d\n\ |
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| 130 | sin_addr.s_addr = %d\n\ |
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| 131 | sin_port = %d\n" |
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| 132 | , server_addr.sin_family |
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| 133 | , server_addr.sin_addr.s_addr |
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| 134 | , ntohs(server_addr.sin_port) |
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| 135 | ); |
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| 136 | printf("\nMaking a listen queue of %d elements", __QUEUE_SIZE__); |
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| 137 | } |
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| 138 | |
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| 139 | /* establish listen queue */ |
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| 140 | if ( listen(socket_server_fd, __QUEUE_SIZE__) == __SOCKET_ERROR__ ) |
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| 141 | { |
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| 142 | printf("\nCould not listen\n"); |
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| 143 | return 0; |
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| 144 | } |
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| 145 | |
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| 146 | for ( ; ; ) |
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| 147 | { |
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| 148 | if ( __DEBUG__ || verbose ) |
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| 149 | puts("\nWaiting for a connection\n"); |
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| 150 | |
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| 151 | /* get the connected socket */ |
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| 152 | socket_accept_fd = accept(socket_server_fd, (struct sockaddr *) &(accept_addr), (socklen_t *) &(sockaddr_in_size)); |
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| 153 | fcntl(socket_accept_fd, F_SETFL, fcntl(socket_accept_fd, F_GETFL, 0) | O_NDELAY); |
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| 154 | |
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| 155 | if ( socket_accept_fd > -1 ) |
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| 156 | { |
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| 157 | if ( clients == (struct client *) NULL ) |
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| 158 | current = clients; |
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| 159 | else |
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| 160 | while ( (current = clients->next) != (struct client *) NULL ); |
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| 161 | |
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| 162 | current = (struct client *) malloc(sizeof(struct client)); |
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| 163 | current->next = (struct client *) NULL; |
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| 164 | current->fd = socket_accept_fd; |
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| 165 | current->sockaddr = accept_addr; |
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| 166 | current->last = time(NULL); |
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| 167 | |
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| 168 | pthread_create(&(threads), NULL, handler, (void *) current); |
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| 169 | } |
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| 170 | } |
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| 171 | pthread_exit(NULL); |
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| 172 | } |
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| 173 | |
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| 174 | void * handler(void * pClient) |
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| 175 | { |
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| 176 | char buffer_client[__BUFFER_SIZE__], |
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| 177 | buffer_jabber[__BUFFER_SIZE__]; |
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| 178 | struct client * client = (struct client *) pClient; |
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| 179 | int i = 0, err; |
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| 180 | time_t last; |
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| 181 | |
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| 182 | char ip[46]; |
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| 183 | unsigned short port; |
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| 184 | inet_ntop(AF_INET, &(client->sockaddr.sin_addr), ip, sizeof (ip)); |
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| 185 | port = ntohs(client->sockaddr.sin_port); |
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| 186 | printf("\nGot a connection from %s, port %hu\n", ip, port); |
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| 187 | /*---------------------------------------------------*/ |
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| 188 | |
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| 189 | int client_is_connected = -1; |
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| 190 | int jabber_is_connected = -1; |
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| 191 | |
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| 192 | struct sockaddr_in socketaddr; |
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| 193 | int socketfd, |
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| 194 | nHostPort; |
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| 195 | |
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| 196 | char buff[4096]; |
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| 197 | char * xml = (char)NULL; |
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| 198 | SSL_CTX *ctx; |
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| 199 | SSL *myssl; |
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| 200 | |
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| 201 | char * old_host, |
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| 202 | * replace_host; |
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| 203 | |
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| 204 | xml = (char *) malloc(sizeof(__CONNECT__)); |
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| 205 | |
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| 206 | if ( (nHostPort = strtol(PORT, 0, 10)) == 0 ) |
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| 207 | { |
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| 208 | printf("\n<port>\n\n"); |
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| 209 | printf("\ncould not make a socket\n"); |
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| 210 | return 0; |
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| 211 | } |
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| 212 | |
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| 213 | socketfd = socket(AF_INET, SOCK_STREAM, 0); |
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| 214 | |
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| 215 | socketaddr.sin_family = AF_INET; |
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| 216 | socketaddr.sin_addr.s_addr = inet_addr(IP); |
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| 217 | socketaddr.sin_port = htons(nHostPort); |
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| 218 | |
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| 219 | OpenSSL_add_all_algorithms(); |
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| 220 | SSL_library_init(); |
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| 221 | SSL_load_error_strings(); |
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| 222 | |
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| 223 | if ( !(ctx = SSL_CTX_new(TLSv1_client_method())) ) |
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| 224 | { |
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| 225 | printf("Error creating the context.\n"); |
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| 226 | exit(0); |
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| 227 | } |
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| 228 | |
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| 229 | err = connect(socketfd, (struct sockaddr*)&socketaddr, sizeof(socketaddr)); |
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| 230 | fcntl(socketfd, F_SETFL, fcntl(socketfd, F_GETFL, 0) | O_NDELAY); |
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| 231 | |
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| 232 | if ( err < 0 ) |
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| 233 | { |
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| 234 | printf("Socket returned error #%d,program terminated\n", err); |
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| 235 | exit(0); |
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| 236 | } |
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| 237 | |
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| 238 | while ( client_is_connected != 0 ) |
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| 239 | { |
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| 240 | /* read from client */ |
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| 241 | puts("\tread - client"); |
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| 242 | bzero(buffer_client, __BUFFER_SIZE__); |
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| 243 | if ( (client_is_connected = read(client->fd, buffer_client, __BUFFER_SIZE__)) != 0 ) |
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| 244 | { |
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| 245 | if ( strlen(buffer_jabber) > 0 ) |
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| 246 | { |
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| 247 | puts("\twrite - client"); |
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| 248 | printf("\t%s\n", buffer_jabber); |
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| 249 | /* write in the client */ |
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| 250 | write(client->fd, buffer_jabber, strlen(buffer_jabber)); |
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| 251 | } |
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| 252 | |
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| 253 | if ( strstr(buffer_client, "<stream:stream") && (old_host = strstr(buffer_client, "to=")) ) |
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| 254 | { |
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| 255 | strncpy(replace_host, buffer_client, (strlen(buffer_client) - strlen(old_host))+4); |
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| 256 | strcat(replace_host, HOST); |
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| 257 | old_host = strstr(old_host, " "); |
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| 258 | old_host--; |
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| 259 | strcat(replace_host, old_host); |
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| 260 | strcpy(buffer_client, replace_host); |
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| 261 | } |
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| 262 | } |
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| 263 | |
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| 264 | /* read from jabber service */ |
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| 265 | puts("\tread - jabber"); |
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| 266 | bzero(buffer_jabber, __BUFFER_SIZE__); |
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| 267 | if ( (jabber_is_connected = read(socketfd, buffer_jabber, __BUFFER_SIZE__)) && strlen(buffer_client) > 0 ) |
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| 268 | { |
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| 269 | puts("\twrite - jabber"); |
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| 270 | printf("\t%s\n", buffer_client); |
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| 271 | /* write in the jabber service */ |
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| 272 | write(socketfd, buffer_client, strlen(buffer_client)); |
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| 273 | } |
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| 274 | |
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| 275 | if ( strstr(buffer_jabber, "<proceed xmlns='urn:ietf:params:xml:ns:xmpp-tls'/>") ) |
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| 276 | { |
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| 277 | fcntl( socketfd, F_SETFL, fcntl( socketfd, F_GETFL ) & ~O_NDELAY ); |
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| 278 | SSL_CTX_set_verify(ctx,SSL_VERIFY_NONE,NULL); |
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| 279 | //Create new ssl object |
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| 280 | myssl=SSL_new(ctx); |
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| 281 | |
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| 282 | if(!myssl){ |
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| 283 | printf("Error creating SSL structure.\n"); |
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| 284 | exit(0); |
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| 285 | } |
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| 286 | |
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| 287 | //Bind the socket to the SSL structure |
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| 288 | SSL_set_fd(myssl,socketfd); |
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| 289 | |
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| 290 | //Connect to the server, SSL layer. |
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| 291 | err=SSL_connect(myssl); |
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| 292 | printf("SSL error #%d in accept,program terminated\n",err); |
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| 293 | //Check for error in connect. |
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| 294 | if (err<1) { |
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| 295 | |
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| 296 | err=SSL_get_error(myssl,err); |
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| 297 | printf("SSL error #%d in accept,program terminated\n",err); |
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| 298 | printf("%d -- %d\n\n", SSL_ERROR_WANT_READ, SSL_ERROR_WANT_WRITE); |
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| 299 | |
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| 300 | if(err==5){printf("sockerrno is:\n");} |
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| 301 | |
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| 302 | close(socketfd); |
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| 303 | SSL_CTX_free(ctx); |
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| 304 | exit(0); |
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| 305 | } |
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| 306 | |
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| 307 | |
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| 308 | fcntl(socketfd, F_SETFL, fcntl(socketfd, F_GETFL, 0) | O_NDELAY); |
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| 309 | } |
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| 310 | |
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| 311 | if ( jabber_is_connected == 0 ) |
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| 312 | client_is_connected = jabber_is_connected; |
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| 313 | |
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| 314 | puts("end loop"); |
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| 315 | usleep(500000); |
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| 316 | } |
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| 317 | if ( close(socketfd) == __SOCKET_ERROR__ ) |
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| 318 | { |
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| 319 | printf("\nCould not close jabber socket\n"); |
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| 320 | return 0; |
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| 321 | } |
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| 322 | //--------------------------------------------------- |
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| 323 | if ( close(client->fd) == __SOCKET_ERROR__ ) |
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| 324 | { |
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| 325 | printf("\nCould not close socket\n"); |
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| 326 | return 0; |
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| 327 | } |
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| 328 | |
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| 329 | fflush(stdin); |
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| 330 | fflush(stdout); |
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| 331 | free(client); |
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| 332 | pthread_exit(NULL); |
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| 333 | } |
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