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
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
|
/*
* ***************************************************************************
* MALOC = < Minimal Abstraction Layer for Object-oriented C >
* Copyright (C) 1994--2000 Michael Holst
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*
* rcsid="$Id: main.c,v 1.11 2003/07/05 21:11:29 mholst Exp $"
* ***************************************************************************
*/
/*
* ***************************************************************************
* File: bridge.c
*
* Purpose: Socket-to-socket bridge.
*
* Notes: The source and destination sockets can be any combination of
* UNIX domain (AF_UNIX, AF_LOCAL) and internet (AF_INET) sockets.
*
* Author: Michael Holst
* ***************************************************************************
*/
#include "maloc/maloc.h"
#define VEMBED(rctag) VPRIVATE const char* rctag; \
static void* use_rcsid=(0 ? &use_rcsid : (void*)&rcsid);
VEMBED(rcsid="$Id: main.c,v 1.11 2003/07/05 21:11:29 mholst Exp $")
/* int MAIN__(void) {}; */
int main(int argc, char *argv[])
{
char inType[80], outType[80], hostname[64], buf[VMAX_BUFSIZE];
int ok, inputWasFile, done, firstTime, bufsize;
Vio *inSock, *outSock;
inputWasFile = 0;
ok = 1;
if (argc == 4) {
strncpy(hostname,"localhost",sizeof(hostname));
fprintf(stderr,"%s: Starting up on host <%s>\n", argv[0], hostname);
if (!strcmp(argv[1],"-u2i")) {
strcpy(inType,"UNIX");
strcpy(outType,"INET");
} else if (!strcmp(argv[1],"-i2u")) {
strcpy(inType,"INET");
strcpy(outType,"UNIX");
} else if (!strcmp(argv[1],"-u2u")) {
strcpy(inType,"UNIX");
strcpy(outType,"UNIX");
} else if (!strcmp(argv[1],"-i2i")) {
strcpy(inType,"INET");
strcpy(outType,"INET");
} else if (!strcmp(argv[1],"-f2u")) {
strcpy(inType,"FILE");
strcpy(outType,"UNIX");
inputWasFile = 1;
} else if (!strcmp(argv[1],"-f2i")) {
strcpy(inType,"FILE");
strcpy(outType,"INET");
inputWasFile = 1;
} else ok = 0;
} else ok = 0;
VJMPERR1( ok );
/* start the Vio communication layer */
Vio_start();
/* open the input socket */
if ( VNULL==(inSock=Vio_ctor(inType,"ASC",hostname,argv[2],"r")) ) {
fprintf(stderr,"%s: Problem open input socket <%s>\n",
argv[0],argv[2]);
VJMPERR1(0);
} else {
firstTime = 1;
done = 0;
while (!done) {
/* do some extra stuff the first time */
if (firstTime) {
firstTime = 0;
/* if input was a file, we just do one shot */
if (inputWasFile) done = 1;
/* must be non-file input; go to sleep for a bit */
} else {
/* (don't need this since now do BLOCKing accept/connect) */
/* Vsig_sleep(100); */
}
/* call (blocking) accept on input socket */
if ( 0 > Vio_accept(inSock,0) ) {
fprintf(stderr,"%s: Problem accept input socket <%s>\n",
argv[0], argv[3]);
VJMPERR1(0);
} else {
/* some i/o */
fprintf(stderr,"%s: Hit on %s port <%s> from <%s>\n",
argv[0],inType,inSock->file,inSock->rhost);
/* now that we have some data, open the output socket */
if ( VNULL==(outSock=Vio_ctor(outType,"ASC",
hostname,argv[3],"w")) ) {
fprintf(stderr,"%s: Problem open output socket <%s>\n",
argv[0], argv[3]);
VJMPERR1(0);
} else {
/* call (blocking) connect on output socket */
if ( 0 > Vio_connect(outSock,0) ) {
fprintf(stderr,"%s: Problem conn output socket <%s>\n",
argv[0], argv[3]);
VJMPERR1(0);
} else {
/* some i/o */
fprintf(stderr,"%s: Pass to %s port <%s> on <%s>\n",
argv[0],outType,outSock->file,outSock->lhost);
/* grab input and write to output until done */
memset(buf, '\0', sizeof(buf));
while (0<(bufsize=Vio_read(inSock,buf,sizeof(buf)))) {
VJMPERR2(bufsize==Vio_write(outSock,buf,bufsize));
memset(buf, '\0', sizeof(buf));
}
/* release the input subsocket and the output socket */
VERROR2:
Vio_connectFree(outSock);
}
/* close output socket */
Vio_dtor(&outSock);
}
/* free the input subsocket */
Vio_acceptFree(inSock);
}
}
}
/* close input socket */
Vio_dtor(&inSock);
/* stop the Vio communication layer */
Vio_stop();
/* return with no errors */
fprintf(stderr,"%s: Shutting down on host <%s>\n", argv[0], hostname);
return 1;
VERROR1:
fprintf(stderr,"Usage: %s -u2i unixSocket inetSocket\n", argv[0]);
fprintf(stderr," or: %s -i2u inetSocket unixSocket\n", argv[0]);
fprintf(stderr," or: %s -u2u unixSocket unixSocket\n", argv[0]);
fprintf(stderr," or: %s -i2i inetSocket inetSocket\n", argv[0]);
fprintf(stderr," or: %s -f2u fileName unixSocket\n", argv[0]);
fprintf(stderr," or: %s -f2i fileName inetSocket\n", argv[0]);
return 0;
}
|
