File: tcp-env.c

package info (click to toggle)
qmail 1.01-5
  • links: PTS
  • area: non-free
  • in suites: hamm
  • size: 2,188 kB
  • ctags: 1,711
  • sloc: ansic: 13,993; makefile: 1,914; perl: 448; sh: 377
file content (129 lines) | stat: -rw-r--r-- 3,002 bytes parent folder | download | duplicates (11)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/param.h>
#include <netinet/in.h>
#include "sig.h"
#include "stralloc.h"
#include "str.h"
#include "env.h"
#include "fmt.h"
#include "scan.h"
#include "subgetopt.h"
#include "ip.h"
#include "dns.h"
#include "byte.h"
#include "remoteinfo.h"
#include "exit.h"
#include "case.h"

void die() { _exit(111); }

struct sockaddr_in salocal;
unsigned long localport;
struct ip_address iplocal;
stralloc localname = {0};

struct sockaddr_in saremote;
unsigned long remoteport;
struct ip_address ipremote;
stralloc remotename = {0};

char temp[IPFMT + FMT_ULONG];

void main(argc,argv)
int argc;
char *argv[];
{
 int dummy;
 char *proto;
 int opt;
 int flagremoteinfo;
 unsigned long timeout;

 sig_pipeignore();

 flagremoteinfo = 1;
 timeout = 30;
 while ((opt = sgopt(argc,argv,"rRt:")) != sgoptdone)
   switch(opt)
    {
     case 'r': flagremoteinfo = 1; break;
     case 'R': flagremoteinfo = 0; break;
     case 't': scan_ulong(sgoptarg,&timeout); break;
    }

 argv += sgoptind;
 argc -= sgoptind;

 if (argc < 1) die();
 if (!env_init()) die();

 proto = env_get("PROTO");
 if (!proto || str_diff(proto,"TCP"))
  {
   if (!env_put("PROTO=TCP")) die();

   dummy = sizeof(salocal);
   if (getsockname(0,(struct sockaddr *) &salocal,&dummy) == -1) die();

   localport = ntohs(salocal.sin_port);
   temp[fmt_ulong(temp,localport)] = 0;
   if (!env_put2("TCPLOCALPORT",temp)) die();

   byte_copy(&iplocal,4,&salocal.sin_addr);
   temp[ip_fmt(temp,&iplocal)] = 0;
   if (!env_put2("TCPLOCALIP",temp)) die();

   switch(dns_ptr(&localname,&iplocal))
    {
     case DNS_MEM: die();
     case DNS_SOFT:
       if (!stralloc_copys(&localname,"softdnserror")) die();
     case 0:
       if (!stralloc_0(&localname)) die();
       case_lowers(localname.s);
       if (!env_put2("TCPLOCALHOST",localname.s)) die();
       break;
     default:
       if (!env_unset("TCPLOCALHOST")) die();
    }

   dummy = sizeof(saremote);
   if (getpeername(0,(struct sockaddr *) &saremote,&dummy) == -1) die();

   remoteport = ntohs(saremote.sin_port);
   temp[fmt_ulong(temp,remoteport)] = 0;
   if (!env_put2("TCPREMOTEPORT",temp)) die();

   byte_copy(&ipremote,4,&saremote.sin_addr);
   temp[ip_fmt(temp,&ipremote)] = 0;
   if (!env_put2("TCPREMOTEIP",temp)) die();

   switch(dns_ptr(&remotename,&ipremote))
    {
     case DNS_MEM: die();
     case DNS_SOFT:
       if (!stralloc_copys(&remotename,"softdnserror")) die();
     case 0:
       if (!stralloc_0(&remotename)) die();
       case_lowers(remotename.s);
       if (!env_put2("TCPREMOTEHOST",remotename.s)) die();
       break;
     default:
       if (!env_unset("TCPREMOTEHOST")) die();
    }

   if (!env_unset("TCPREMOTEINFO")) die();
   if (flagremoteinfo)
    {
     char *rinfo;
     rinfo = remoteinfo_get(&ipremote,remoteport,&iplocal,localport,(int) timeout);
     if (rinfo)
       if (!env_put2("TCPREMOTEINFO",rinfo)) die();
    }
  }

 sig_pipedefault();
 execvp(*argv,argv);
 die();
}