/* A simple snmp trap daemon

** version 2

** by Pegasus Epsilon <pegasus@pimpninjas.org>

**

** History:

**

** version 1: first functional version

** version 2: timestamps added

*/

#include <netinet/in.h> /* ??? INADDR_ANY, struct sockaddr_in */

#include <sys/types.h> /* socket(), bind() */

#include <sys/socket.h> /* socket(), bind() */

#include <stdlib.h> /* exit(), malloc() */

#include <unistd.h> /* write() */

#include <stdio.h> /* perror() */

#include <string.h> /* strcmp(), memset() */

#include <time.h> /* ctime(), time(), time_t */

#ifndef TRUE

# define TRUE -1

#endif

#define PORT 162

#define TBUFLEN 30

void perr(char *err) {

perror(err);

exit(0);

}

void usage(char *err) {

if (err) fprintf(stderr, "%s.\n", err);

/* usage help */

exit(0);

}

int main (int argc, char *argv[]) {

unsigned int sock, i = 0, sz_sin;

struct sockaddr_in sin;

char *buffer, timebuf[TBUFLEN];

time_t now;

if ((sock = socket(PF_INET, SOCK_DGRAM, 0)) == TRUE)

perr("failed to create socket");

sin.sin_family = AF_INET;

sin.sin_addr.s_addr = htonl(INADDR_ANY);

sin.sin_port = htons(PORT);

if (bind(sock, (struct sockaddr *)&sin, sizeof(sin)) != 0)

perr("failed to bind socket to port");

buffer = malloc((size_t)1025);

memset(buffer, 0, 1025);

sz_sin = sizeof(sin);

for (;;) {

if((i = recvfrom(

sock, buffer, 1024, 0, (struct sockaddr *)&sin, &sz_sin

)) == TRUE) perr("cannot read data");

now = time(NULL);

strftime(timebuf, TBUFLEN, "%d %b %Y %T %z", localtime(&now));

printf("%s: %s", timebuf, buffer+74);

fflush(stdout);

memset(buffer, 0, 1024);

}

return 0;

}