package/busybox/patches/610-syslog-remote-retry-connection.patch

   1 Index: busybox-1.16.1/sysklogd/syslogd.c
   2 ===================================================================
   3 --- busybox-1.16.1.orig/sysklogd/syslogd.c      2010-03-28 13:44:04.000000000 -0400
   4 +++ busybox-1.16.1/sysklogd/syslogd.c   2010-06-17 21:48:11.000000000 -0400
   5 @@ -555,6 +555,7 @@
   6  static void do_syslogd(void)
   7  {
   8         int sock_fd;
   9 +       int send_err = 0;
  10  #if ENABLE_FEATURE_SYSLOGD_DUP
  11         int last_sz = -1;
  12         char *last_buf;
  13 @@ -632,10 +633,23 @@
  14                          * over network, mimic that */
  15                         recvbuf[sz] = '\n';
  16                         /* send message to remote logger, ignore possible error */
  17 -                       /* TODO: on some errors, close and set G.remoteFD to -1
  18 -                        * so that DNS resolution and connect is retried? */
  19 -                       sendto(G.remoteFD, recvbuf, sz+1, MSG_DONTWAIT,
  20 -                                   &G.remoteAddr->u.sa, G.remoteAddr->len);
  21 +                       if ( sendto(G.remoteFD, recvbuf, sz+1, MSG_DONTWAIT,
  22 +                                   &G.remoteAddr->u.sa, G.remoteAddr->len)  == -1 ) {
  23 +                               send_err = errno;
  24 +                   }
  25 +
  26 +                       /* On some errors, close and set G.remoteFD to -1
  27 +                        * so that DNS resolution and connect is retried */
  28 +                   switch (send_err) {
  29 +                       case ECONNRESET:
  30 +                       case EDESTADDRREQ:
  31 +                       case EISCONN:
  32 +                       case ENOTCONN:
  33 +                       case EPIPE:
  34 +                                       close(G.remoteFD);
  35 +                                       G.remoteFD = -1;
  36 +                                       break;
  37 +                   }
  38   no_luck: ;
  39                 }
  40  #endif