Porting to FreeBSD:

[tinc] / src / net.c

diff --git a/src/net.c b/src/net.c
index 5d7f841..e7297d1 100644 (file)
--- a/src/net.c
+++ b/src/net.c
@@ -17,17 +17,13 @@
     along with this program; if not, write to the Free Software
     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
-    $Id: net.c,v 1.35.4.69 2000/11/08 00:10:49 guus Exp $
+    $Id: net.c,v 1.35.4.73 2000/11/15 13:33:26 guus Exp $
 */
 
 #include "config.h"
 
-#include <arpa/inet.h>
 #include <errno.h>
 #include <fcntl.h>
-/* SunOS really wants sys/socket.h BEFORE net/if.h */
-#include <sys/socket.h>
-#include <net/if.h>
 #include <netdb.h>
 #include <netinet/in.h>
 #include <stdio.h>
@@ -39,9 +35,29 @@
 #include <syslog.h>
 #include <unistd.h>
 #include <sys/ioctl.h>
-#include <openssl/rand.h>
-#include <openssl/evp.h>
-#include <openssl/err.h>
+/* SunOS really wants sys/socket.h BEFORE net/if.h,
+   and FreeBSD wants these lines below the rest. */
+#include <arpa/inet.h>
+#include <sys/socket.h>
+#include <net/if.h>
+
+#ifdef HAVE_OPENSSL_RAND_H
+# include <openssl/rand.h>
+#else
+# include <rand.h>
+#endif
+
+#ifdef HAVE_OPENSSL_EVP_H
+# include <openssl/evp.h>
+#else
+# include <evp.h>
+#endif
+
+#ifdef HAVE_OPENSSL_ERR_H
+# include <openssl/err.h>
+#else
+# include <err.h>
+#endif
 
 #ifdef HAVE_TUNTAP
 #include LINUX_IF_TUN_H
@@ -86,6 +102,7 @@ int execute_script(const char *name)
   char *scriptname;
   pid_t pid;
   char *s;
+  int error;
 
   if((pid = fork()) < 0)
     {
@@ -101,6 +118,8 @@ int execute_script(const char *name)
 
   /* Child here */
 
+  error = 0;
+
   if(netname)
     {
       asprintf(&s, "NETNAME=%s", netname);
@@ -113,18 +132,55 @@ int execute_script(const char *name)
     }
 #endif
 
-  chdir(confbase);     /* This cannot fail since we already read config files from this directory. */
+  if(chdir(confbase) < 0)
+    /* This cannot fail since we already read config files from this
+       directory. - Guus */
+    /* Yes this can fail, somebody could have removed this directory
+       when we didn't pay attention. - Ivo */
+    {
+      if(chdir("/") < 0)
+       /* Now if THIS fails, something wicked is going on. - Ivo */
+       syslog(LOG_ERR, _("Couldn't chdir to `/': %m"));
+
+      /* Continue anyway. */
+    }
   
   asprintf(&scriptname, "%s/%s", confbase, name);
-  execl(scriptname, NULL);
 
+  /* Close all file descriptors */
+  closelog();
+  fcloseall();
+
+  /* Open standard input */
+  if(open("/dev/null", O_RDONLY) < 0)
+    {
+      syslog(LOG_ERR, _("Opening `/dev/null' failed: %m"));
+      error = 1;
+    }
+
+  if(!error)
+    {
+      /* Standard output directly goes to syslog */
+      openlog(name, LOG_CONS | LOG_PID, LOG_DAEMON);
+      /* Standard error as well */
+      if(dup2(1, 2) < 0)
+       {
+         syslog(LOG_ERR, _("System call `%s' failed: %m"),
+                "dup2");
+         error = 1;
+       }
+    }
+  
+  if(error && debug_lvl > 1)
+    syslog(LOG_INFO, _("This means that any output the script generates will not be shown in syslog."));
+  
+  execl(scriptname, NULL);
   /* No return on success */
   
   if(errno != ENOENT)  /* Ignore if the file does not exist */
     syslog(LOG_WARNING, _("Error executing `%s': %m"), scriptname);
 
   /* No need to free things */
-
   exit(0);
 }
 
@@ -485,6 +541,7 @@ cp
 
   if(setsockopt(nfd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)))
     {
+      close(nfd);
       syslog(LOG_ERR, _("System call `%s' failed: %m"),
             "setsockopt");
       return -1;
@@ -492,6 +549,7 @@ cp
 
   if(setsockopt(nfd, SOL_SOCKET, SO_KEEPALIVE, &one, sizeof(one)))
     {
+      close(nfd);
       syslog(LOG_ERR, _("System call `%s' failed: %m"),
             "setsockopt");
       return -1;
@@ -500,6 +558,7 @@ cp
   flags = fcntl(nfd, F_GETFL);
   if(fcntl(nfd, F_SETFL, flags | O_NONBLOCK) < 0)
     {
+      close(nfd);
       syslog(LOG_ERR, _("System call `%s' failed: %m"),
             "fcntl");
       return -1;
@@ -509,6 +568,7 @@ cp
     {
       if(setsockopt(nfd, SOL_SOCKET, SO_KEEPALIVE, cfg->data.ptr, strlen(cfg->data.ptr)))
         {
+          close(nfd);
           syslog(LOG_ERR, _("Unable to bind listen socket to interface %s: %m"), cfg->data.ptr);
           return -1;
         }
@@ -525,12 +585,14 @@ cp
 
   if(bind(nfd, (struct sockaddr *)&a, sizeof(struct sockaddr)))
     {
+      close(nfd);
       syslog(LOG_ERR, _("Can't bind to port %hd/tcp: %m"), port);
       return -1;
     }
 
   if(listen(nfd, 3))
     {
+      close(nfd);
       syslog(LOG_ERR, _("System call `%s' failed: %m"),
             "listen");
       return -1;
@@ -551,12 +613,14 @@ int setup_vpn_in_socket(int port)
 cp
   if((nfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0)
     {
+      close(nfd);
       syslog(LOG_ERR, _("Creating socket failed: %m"));
       return -1;
     }
 
   if(setsockopt(nfd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)))
     {
+      close(nfd);
       syslog(LOG_ERR, _("System call `%s' failed: %m"),
             "setsockopt");
       return -1;
@@ -565,6 +629,7 @@ cp
   flags = fcntl(nfd, F_GETFL);
   if(fcntl(nfd, F_SETFL, flags | O_NONBLOCK) < 0)
     {
+      close(nfd);
       syslog(LOG_ERR, _("System call `%s' failed: %m"),
             "fcntl");
       return -1;
@@ -577,6 +642,7 @@ cp
 
   if(bind(nfd, (struct sockaddr *)&a, sizeof(struct sockaddr)))
     {
+      close(nfd);
       syslog(LOG_ERR, _("Can't bind to port %hd/udp: %m"), port);
       return -1;
     }
@@ -615,6 +681,7 @@ cp
 
   if(connect(cl->meta_socket, (struct sockaddr *)&a, sizeof(a)) == -1)
     {
+      close(cl->meta_socket);
       syslog(LOG_ERR, _("%s port %hd: %m"), cl->hostname, cl->port);
       return -1;
     }
@@ -622,6 +689,7 @@ cp
   flags = fcntl(cl->meta_socket, F_GETFL);
   if(fcntl(cl->meta_socket, F_SETFL, flags | O_NONBLOCK) < 0)
     {
+      close(cl->meta_socket);
       syslog(LOG_ERR, _("fcntl for %s port %d: %m"),
              cl->hostname, cl->port);
       return -1;
@@ -964,6 +1032,7 @@ cp
 
   if(setsockopt(nfd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)))
     {
+      close(nfd);
       syslog(LOG_ERR, _("System call `%s' failed: %m"),
             "setsockopt");
       return -1;
@@ -972,6 +1041,7 @@ cp
   flags = fcntl(nfd, F_GETFL);
   if(fcntl(nfd, F_SETFL, flags | O_NONBLOCK) < 0)
     {
+      close(nfd);
       syslog(LOG_ERR, _("System call `%s' failed: %m"),
             "fcntl");
       return -1;
@@ -984,6 +1054,7 @@ cp
 
   if(bind(nfd, (struct sockaddr *)&a, sizeof(struct sockaddr)))
     {
+      close(nfd);
       syslog(LOG_ERR, _("Can't bind to port %hd/udp: %m"), myself->port);
       return -1;
     }
@@ -994,6 +1065,7 @@ cp
 
   if(connect(nfd, (struct sockaddr *)&a, sizeof(a)) == -1)
     {
+      close(nfd);
       syslog(LOG_ERR, _("Connecting to %s port %d failed: %m"),
             cl->hostname, cl->port);
       return -1;
@@ -1002,6 +1074,7 @@ cp
   flags = fcntl(nfd, F_GETFL);
   if(fcntl(nfd, F_SETFL, flags | O_NONBLOCK) < 0)
     {
+      close(nfd);
       syslog(LOG_ERR, _("This is a bug: %s:%d: %d:%m %s (%s)"), __FILE__, __LINE__, nfd,
              cl->name, cl->hostname);
       return -1;
@@ -1025,7 +1098,7 @@ conn_list_t *create_new_connection(int sfd)
 cp
   p = new_conn_list();
 
-  if(getpeername(sfd, &ci, &len) < 0)
+  if(getpeername(sfd, (struct sockaddr *) &ci, (socklen_t *) &len) < 0)
     {
       syslog(LOG_ERR, _("System call `%s' failed: %m"),
             "getpeername");