Last change
on this file since 4d689e2 was
f0d67e5,
checked in by Thierry Delisle <tdelisle@…>, 4 years ago
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Restored io examples to example folder
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-
Property mode set to
100644
|
File size:
2.1 KB
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Line | |
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1 | #include <stdio.h> |
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2 | #include <stdlib.h> |
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3 | #include <string.h> |
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4 | |
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5 | #include <netdb.h> |
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6 | #include <unistd.h> |
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7 | |
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8 | #include <sys/types.h> |
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9 | #include <sys/socket.h> |
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10 | |
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11 | int main(int argc, char * argv[]) { |
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12 | if(argc != 2) { |
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13 | printf("usage: %s portnumber\n", argv[0]); |
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14 | exit( EXIT_FAILURE ); |
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15 | } |
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16 | int port = atoi(argv[1]); |
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17 | if(port < 1) { |
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18 | printf("Invalid port : %d (from %s)\n", port, argv[1]); |
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19 | exit( EXIT_FAILURE ); |
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20 | } |
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21 | |
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22 | int sock = socket(AF_INET, SOCK_STREAM, 0); |
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23 | if(sock < 0) { |
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24 | perror( "socket" ); |
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25 | exit( EXIT_FAILURE ); |
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26 | } |
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27 | |
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28 | struct hostent * server = gethostbyname("localhost"); |
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29 | if(server == NULL) { |
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30 | perror("localhost not found"); |
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31 | exit( EXIT_FAILURE ); |
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32 | } |
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33 | |
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34 | struct sockaddr_in serv_addr; |
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35 | memset(&serv_addr, 0, sizeof(serv_addr)); |
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36 | serv_addr.sin_family = AF_INET; |
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37 | memcpy(&serv_addr.sin_addr.s_addr, server->h_addr, server->h_length); |
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38 | serv_addr.sin_port = htons(port); |
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39 | |
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40 | int ret = connect(sock, (struct sockaddr *)&serv_addr, sizeof(serv_addr)); |
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41 | if(ret < 0) { |
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42 | perror( "connect" ); |
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43 | exit( EXIT_FAILURE ); |
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44 | } |
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45 | |
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46 | char buffer[256]; |
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47 | struct iovec iov = { buffer, 0 }; |
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48 | struct msghdr msg; |
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49 | msg.msg_name = NULL; |
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50 | msg.msg_namelen = 0; |
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51 | msg.msg_control = NULL; |
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52 | msg.msg_controllen = 0; |
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53 | msg.msg_iov = &iov; |
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54 | msg.msg_iovlen = 1; |
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55 | msg.msg_flags = 0; |
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56 | |
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57 | |
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58 | int rd; |
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59 | while(0 != (rd = read(STDIN_FILENO, buffer, 256))) { |
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60 | if(rd < 0) { |
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61 | perror( "read" ); |
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62 | exit( EXIT_FAILURE ); |
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63 | } |
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64 | |
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65 | iov.iov_len = rd; |
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66 | int sent = sendmsg(sock, &msg, 0); |
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67 | if( sent < 0 ) { |
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68 | perror( "read" ); |
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69 | exit( EXIT_FAILURE ); |
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70 | } |
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71 | |
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72 | if(sent != rd) { |
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73 | printf("Expected to send %d bytes, sent %d\n", rd, sent); |
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74 | exit( EXIT_FAILURE ); |
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75 | } |
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76 | } |
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77 | |
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78 | ret = close(sock); |
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79 | if(ret < 0) { |
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80 | perror( "close" ); |
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81 | exit( EXIT_FAILURE ); |
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82 | } |
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83 | |
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84 | exit( EXIT_SUCCESS ); |
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85 | } |
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