qmail-tcpto.c

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/* XXX: this program knows quite a bit about tcpto's internals */
 
#include <sys/socket.h>
#include <unistd.h>
#include "buffer.h"
#include "auto_qmail.h"
#include "fmt.h"
#include "ip.h"
#include "lock.h"
#include "error.h"
#include "exit.h"
#include "datetime.h"
#include "now.h"
#include "stralloc.h"
#include "open.h"
#include "logmsg.h"
 
#define WHO "qmail-tcpto"
 
void die(n) int n; { buffer_flush(buffer_1); _exit(n); }
 
void warn(s) char *s;
{
  char *x;
  x = error_str(errno);
  buffer_puts(buffer_1,s);
  buffer_puts(buffer_1,": ");
  buffer_puts(buffer_1,x);
  buffer_puts(buffer_1,"\n");
}
 
void die_chdir() { logmsg(WHO,110,FATAL,"unable to chdir"); }
void die_open() { logmsg(WHO,112,FATAL,"unable to open tcpto"); }
void die_lock() { logmsg(WHO,112,FATAL,"unable to lock tcpto"); }
void die_read() { logmsg(WHO,112,FATAL,"unable to read tcpto"); }
 
char tcpto_buf[1024];
 
char tmp[FMT_ULONG + IPFMT];
 
int main(void)
{
  int fdlock;
  int fd;
  int r;
  int i;
  char *record;
  char ip4[4];
  char ip6[16];
  datetime_sec when;
  datetime_sec start;
 
  if (chdir(auto_qmail) == -1) die_chdir();
  if (chdir("queue/lock") == -1) die_chdir();
 
  fdlock = open_write("tcpto");
  if (fdlock == -1) die_open();
  fd = open_read("tcpto");
  if (fd == -1) die_open();
  if (lock_ex(fdlock) == -1) die_lock();
  r = read(fd,tcpto_buf,sizeof(tcpto_buf));
  close(fd);
  close(fdlock);
 
  if (r == -1) die_read();
  r >>= 5;                   /* 32 bit read */
 
  start = now();
  record = tcpto_buf;
 
  for (i = 0; i < r; ++i) {
    if (record[4] >= 1) {
      when = (unsigned long) (unsigned char) record[11];
      when = (when << 8) + (unsigned long) (unsigned char) record[10];
      when = (when << 8) + (unsigned long) (unsigned char) record[9];
      when = (when << 8) + (unsigned long) (unsigned char) record[8];
 
      if (record[0] == AF_INET) {
        byte_copy(&ip4,4,record + 16);
        buffer_put(buffer_1,tmp,ip4_fmt(tmp,ip4));
      } else {
        byte_copy(&ip6,16,record + 16);
        buffer_put(buffer_1,tmp,ip6_fmt(tmp,ip6));
      }
      buffer_puts(buffer_1," timed out ");
      buffer_put(buffer_1,tmp,fmt_ulong(tmp,(unsigned long) (start - when)));
      buffer_puts(buffer_1," seconds ago; # recent timeouts: ");
      buffer_put(buffer_1,tmp,fmt_ulong(tmp,(unsigned long) (unsigned char) record[4]));
      buffer_puts(buffer_1,"\n");
     }
   record += 32;
  }
 
 die(0);
}