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Sourcecode: l2tpns version File versions

util.c

/* Misc util functions */

char const *cvs_id_util = "$Id: util.c,v 1.8 2004/12/16 08:49:53 bodea Exp $";

#include <unistd.h>
#include <errno.h>
#include <sched.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <string.h>
#include <sys/mman.h>

#include "l2tpns.h"
#ifdef BGP
#include "bgp.h"
#endif

// format ipv4 addr as a dotted-quad; n chooses one of 4 static buffers
// to use
char *fmtaddr(in_addr_t addr, int n)
{
      static char addrs[4][16];
      struct in_addr in;

      if (n < 0 || n >= 4) return "";
      in.s_addr = addr;
      return strcpy(addrs[n], inet_ntoa(in));
}

void *shared_malloc(unsigned int size)
{
      void * p;
      p = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, 0, 0);

      if (p == MAP_FAILED)
            p = NULL;

      return p;
}

extern int udpfd, controlfd, tunfd, snoopfd, ifrfd, cluster_sockfd;
extern int *radfds;

pid_t fork_and_close()
{
      pid_t pid = fork();
      int i;

      if (pid)
            return pid;

      if (config->scheduler_fifo)
      {
            struct sched_param params = {0};
            params.sched_priority = 0;
            if (sched_setscheduler(0, SCHED_OTHER, &params))
            {
                  LOG(0, 0, 0, "Error setting scheduler to OTHER after fork: %s\n", strerror(errno));
                  LOG(0, 0, 0, "This is probably really really bad.\n");
            }
      }

      signal(SIGPIPE, SIG_DFL);
      signal(SIGCHLD, SIG_DFL);
      signal(SIGHUP, SIG_DFL);
      signal(SIGUSR1, SIG_DFL);
      signal(SIGQUIT, SIG_DFL);
      signal(SIGKILL, SIG_DFL);
      signal(SIGALRM, SIG_DFL);
      signal(SIGTERM, SIG_DFL);

      // Close sockets
      if (tunfd != -1)          close(tunfd);
      if (udpfd != -1)          close(udpfd);
      if (controlfd != -1)      close(controlfd);
      if (snoopfd != -1)        close(snoopfd);
      if (ifrfd != -1)          close(ifrfd);
      if (cluster_sockfd != -1) close(cluster_sockfd);
      if (clifd != -1)          close(clifd);

      for (i = 0; radfds && i < config->num_radfds; i++)
            close(radfds[i]);
#ifdef BGP
      for (i = 0; i < BGP_NUM_PEERS; i++)
            if (bgp_peers[i].sock != -1)
                  close(bgp_peers[i].sock);
#endif /* BGP */

      return pid;
}

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