mdw@git.distorted.org.uk Git - qmail/blob - tcp-env.c

   1 #include <sys/types.h>
   2 #include <sys/socket.h>
   3 #include <sys/param.h>
   4 #include <netinet/in.h>
   5 #include "sig.h"
   6 #include "stralloc.h"
   7 #include "str.h"
   8 #include "env.h"
   9 #include "fmt.h"
  10 #include "scan.h"
  11 #include "subgetopt.h"
  12 #include "ip.h"
  13 #include "dns.h"
  14 #include "byte.h"
  15 #include "remoteinfo.h"
  16 #include "exit.h"
  17 #include "case.h"
  18
  19 void die() { _exit(111); }
  20
  21 struct sockaddr_in salocal;
  22 unsigned long localport;
  23 struct ip_address iplocal;
  24 stralloc localname = {0};
  25
  26 struct sockaddr_in saremote;
  27 unsigned long remoteport;
  28 struct ip_address ipremote;
  29 stralloc remotename = {0};
  30
  31 char temp[IPFMT + FMT_ULONG];
  32
  33 void main(argc,argv)
  34 int argc;
  35 char *argv[];
  36 {
  37  int dummy;
  38  char *proto;
  39  int opt;
  40  int flagremoteinfo;
  41  unsigned long timeout;
  42
  43  sig_pipeignore();
  44
  45  flagremoteinfo = 1;
  46  timeout = 30;
  47  while ((opt = sgopt(argc,argv,"rRt:")) != sgoptdone)
  48    switch(opt)
  49     {
  50      case 'r': flagremoteinfo = 1; break;
  51      case 'R': flagremoteinfo = 0; break;
  52      case 't': scan_ulong(sgoptarg,&timeout); break;
  53     }
  54
  55  argv += sgoptind;
  56  argc -= sgoptind;
  57
  58  if (argc < 1) die();
  59  if (!env_init()) die();
  60
  61  proto = env_get("PROTO");
  62  if (!proto || str_diff(proto,"TCP"))
  63   {
  64    if (!env_put("PROTO=TCP")) die();
  65
  66    dummy = sizeof(salocal);
  67    if (getsockname(0,(struct sockaddr *) &salocal,&dummy) == -1) die();
  68
  69    localport = ntohs(salocal.sin_port);
  70    temp[fmt_ulong(temp,localport)] = 0;
  71    if (!env_put2("TCPLOCALPORT",temp)) die();
  72
  73    byte_copy(&iplocal,4,&salocal.sin_addr);
  74    temp[ip_fmt(temp,&iplocal)] = 0;
  75    if (!env_put2("TCPLOCALIP",temp)) die();
  76
  77    switch(dns_ptr(&localname,&iplocal))
  78     {
  79      case DNS_MEM: die();
  80      case DNS_SOFT:
  81        if (!stralloc_copys(&localname,"softdnserror")) die();
  82      case 0:
  83        if (!stralloc_0(&localname)) die();
  84        case_lowers(localname.s);
  85        if (!env_put2("TCPLOCALHOST",localname.s)) die();
  86        break;
  87      default:
  88        if (!env_unset("TCPLOCALHOST")) die();
  89     }
  90
  91    dummy = sizeof(saremote);
  92    if (getpeername(0,(struct sockaddr *) &saremote,&dummy) == -1) die();
  93
  94    remoteport = ntohs(saremote.sin_port);
  95    temp[fmt_ulong(temp,remoteport)] = 0;
  96    if (!env_put2("TCPREMOTEPORT",temp)) die();
  97
  98    byte_copy(&ipremote,4,&saremote.sin_addr);
  99    temp[ip_fmt(temp,&ipremote)] = 0;
 100    if (!env_put2("TCPREMOTEIP",temp)) die();
 101
 102    switch(dns_ptr(&remotename,&ipremote))
 103     {
 104      case DNS_MEM: die();
 105      case DNS_SOFT:
 106        if (!stralloc_copys(&remotename,"softdnserror")) die();
 107      case 0:
 108        if (!stralloc_0(&remotename)) die();
 109        case_lowers(remotename.s);
 110        if (!env_put2("TCPREMOTEHOST",remotename.s)) die();
 111        break;
 112      default:
 113        if (!env_unset("TCPREMOTEHOST")) die();
 114     }
 115
 116    if (!env_unset("TCPREMOTEINFO")) die();
 117    if (flagremoteinfo)
 118     {
 119      char *rinfo;
 120      rinfo = remoteinfo_get(&ipremote,remoteport,&iplocal,localport,(int) timeout);
 121      if (rinfo)
 122        if (!env_put2("TCPREMOTEINFO",rinfo)) die();
 123     }
 124   }
 125
 126  sig_pipedefault();
 127  execvp(*argv,argv);
 128  die();
 129 }