[245] | 1 | #include <stdio.h> |
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| 2 | #include <sys/socket.h> |
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| 3 | #include <arpa/inet.h> |
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| 4 | #include <errno.h> |
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| 5 | #include <stdlib.h> |
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| 6 | #include <string.h> |
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| 7 | #include <fcntl.h> |
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| 8 | #include <signal.h> |
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| 9 | #include <unistd.h> |
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| 10 | #include <netinet/in.h> |
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| 11 | |
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| 12 | void Die(char *mess) |
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| 13 | { |
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| 14 | perror(mess); |
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| 15 | exit(1); |
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| 16 | } |
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| 17 | |
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| 18 | int main(int argc, char *argv[]) |
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| 19 | { |
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| 20 | struct sockaddr_in recv_sockopt; |
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| 21 | int recv_sock; |
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| 22 | int recv_length = sizeof(recv_sockopt); |
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| 23 | int received; |
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| 24 | char BLACK_LIST[256]; |
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| 25 | |
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| 26 | if (argc <= 1) |
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| 27 | { |
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| 28 | fprintf(stderr, "USAGE: %s <RECV_PORT>\n", argv[0]); |
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| 29 | exit(1); |
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| 30 | } |
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| 31 | |
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| 32 | /* Create the UDP socket to send response to icas_recv */ |
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| 33 | if ((recv_sock = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) |
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| 34 | { |
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| 35 | Die("Failed to create socket for sending black list."); |
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| 36 | } |
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| 37 | |
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| 38 | /* Construct the server sockaddr_in structure */ |
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| 39 | memset(&recv_sockopt, 0, sizeof(recv_sockopt)); /* Clear struct */ |
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| 40 | memset(&BLACK_LIST, 0, sizeof(BLACK_LIST)); /* Clear string */ |
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| 41 | |
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| 42 | // socket option of icas_send socket |
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| 43 | recv_sockopt.sin_family = AF_INET; /* Internet/IP */ |
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| 44 | recv_sockopt.sin_addr.s_addr = htonl(INADDR_ANY); /* Any IP address */ |
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| 45 | recv_sockopt.sin_port = htons(atoi(argv[1])); /* server port */ |
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| 46 | |
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| 47 | /* Bind the socket */ |
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| 48 | if (bind(recv_sock, (struct sockaddr *) &recv_sockopt, recv_length) < 0) |
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| 49 | { |
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| 50 | Die("Failed to bind server socket"); |
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| 51 | } |
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| 52 | fprintf(stderr,"Finished binding port #%s for icas_recv socket.\n",argv[1]); |
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| 53 | |
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| 54 | if ((received = recvfrom(recv_sock, BLACK_LIST, sizeof(BLACK_LIST), 0, (struct sockaddr *) &recv_sockopt, (socklen_t *) &recv_length)) < 0) |
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| 55 | { |
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| 56 | Die("Failed to receive message"); |
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| 57 | } |
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| 58 | fprintf(stderr,"Received: %s\n", BLACK_LIST); |
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| 59 | |
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| 60 | close(recv_sock); |
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| 61 | exit(0); |
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| 62 | } |
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