#include <sys/types.h>#include <sys/socket.h>#include <netinet/in.h>#include <arpa/inet.h>#include <netdb.h>#include <stdio.h>#include <unistd.h>#include <string.h>#include <sys/time.h>Include dependency graph for udpClient.c:
Go to the source code of this file.
Defines | |
| #define | REMOTE_SERVER_PORT 8 |
| #define | MAX_MSG 100 |
Functions | |
| int | main (int argc, char *argv[]) |
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Definition at line 22 of file udpClient.c. |
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Definition at line 21 of file udpClient.c. Referenced by main(). |
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Definition at line 25 of file udpClient.c. References AF_INET, gethostbyname(), htonl, htons, INADDR_ANY, inet_ntoa(), NULL, REMOTE_SERVER_PORT, in_addr::s_addr, sockaddr_in::sin_addr, sockaddr_in::sin_family, sockaddr_in::sin_port, and SOCK_DGRAM.
00025 {
00026
00027 int sd, rc, i;
00028 struct sockaddr_in cliAddr, remoteServAddr;
00029 struct hostent *h;
00030
00031 /* check command line args */
00032 if(argc<3) {
00033 printf("usage : %s <server> <data1> ... <dataN> \n", argv[0]);
00034 exit(1);
00035 }
00036
00037 /* get server IP address (no check if input is IP address or DNS name */
00038 h = gethostbyname(argv[1]);
00039 if(h==NULL) {
00040 printf("%s: unknown host '%s' \n", argv[0], argv[1]);
00041 exit(1);
00042 }
00043
00044 printf("%s: sending data to '%s' (IP : %s) \n", argv[0], h->h_name,
00045 inet_ntoa(*(struct in_addr *)h->h_addr_list[0]));
00046
00047 remoteServAddr.sin_family = h->h_addrtype;
00048 memcpy((char *) &remoteServAddr.sin_addr.s_addr,
00049 h->h_addr_list[0], h->h_length);
00050 remoteServAddr.sin_port = htons(REMOTE_SERVER_PORT);
00051
00052 /* socket creation */
00053 sd = socket(AF_INET,SOCK_DGRAM,0);
00054 if(sd<0) {
00055 printf("%s: cannot open socket \n",argv[0]);
00056 exit(1);
00057 }
00058
00059 /* bind any port */
00060 cliAddr.sin_family = AF_INET;
00061 cliAddr.sin_addr.s_addr = htonl(INADDR_ANY);
00062 cliAddr.sin_port = htons(0);
00063
00064 rc = bind(sd, (struct sockaddr *) &cliAddr, sizeof(cliAddr));
00065 if(rc<0) {
00066 printf("%s: cannot bind port\n", argv[0]);
00067 exit(1);
00068 }
00069
00070
00071 /* send data */
00072 for(i=2;i<argc;i++) {
00073 rc = sendto(sd, argv[i], strlen(argv[i])+1, 0,
00074 (struct sockaddr *) &remoteServAddr,
00075 sizeof(remoteServAddr));
00076
00077 if(rc<0) {
00078 printf("%s: cannot send data %d \n",argv[0],i-1);
00079 close(sd);
00080 exit(1);
00081 }
00082
00083 }
00084
00085 return 1;
00086
00087 }
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1.3.4