#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 dependency graph for udpServer.c:
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Defines | |
| #define | LOCAL_SERVER_PORT 7 |
| #define | MAX_MSG 100 |
Functions | |
| int | main (int argc, char *argv[]) |
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Definition at line 20 of file udpServer.c. Referenced by main(). |
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Definition at line 21 of file udpServer.c. |
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Definition at line 23 of file udpServer.c. References AF_INET, htonl, htons, INADDR_ANY, inet_ntoa(), LOCAL_SERVER_PORT, MAX_MSG, ntohs, in_addr::s_addr, sockaddr_in::sin_addr, sockaddr_in::sin_family, sockaddr_in::sin_port, and SOCK_DGRAM.
00023 {
00024
00025 int sd, rc, n, cliLen;
00026 struct sockaddr_in cliAddr, servAddr;
00027 char msg[MAX_MSG];
00028
00029 /* socket creation */
00030 sd=socket(AF_INET, SOCK_DGRAM, 0);
00031 if(sd<0) {
00032 printf("%s: cannot open socket \n",argv[0]);
00033 exit(1);
00034 }
00035
00036 /* bind local server port */
00037 servAddr.sin_family = AF_INET;
00038 servAddr.sin_addr.s_addr = htonl(INADDR_ANY);
00039 servAddr.sin_port = htons(LOCAL_SERVER_PORT);
00040 rc = bind (sd, (struct sockaddr *) &servAddr,sizeof(servAddr));
00041 if(rc<0) {
00042 printf("%s: cannot bind port number %d \n",
00043 argv[0], LOCAL_SERVER_PORT);
00044 exit(1);
00045 }
00046
00047 printf("%s: waiting for data on port UDP %u\n",
00048 argv[0],LOCAL_SERVER_PORT);
00049
00050 /* server infinite loop */
00051 while(1) {
00052
00053 /* init buffer */
00054 memset(msg,0x0,MAX_MSG);
00055
00056
00057 /* receive message */
00058 cliLen = sizeof(cliAddr);
00059 n = recvfrom(sd, msg, MAX_MSG, 0,
00060 (struct sockaddr *) &cliAddr, &cliLen);
00061
00062 if(n<0) {
00063 printf("%s: cannot receive data \n",argv[0]);
00064 continue;
00065 }
00066
00067 /* print received message */
00068 printf("%s: from %s:UDP%u : %s \n",
00069 argv[0],inet_ntoa(cliAddr.sin_addr),
00070 ntohs(cliAddr.sin_port),msg);
00071
00072 }/* end of server infinite loop */
00073
00074 return 0;
00075
00076 }
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1.3.4