bin/mr/mirror_reflector.c
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FUNCTIONS
This source file includes following functions.
- main
1 /***************************************
2 $Revision: 1.5 $
3
4 Wrapper for NRTM client
5
6 Status: NOT REVUED, NOT TESTED
7
8 Author(s): Andrei Robachevsky
9
10 ******************/ /******************
11 Modification History:
12 andrei (17/01/2000) Created.
13 ******************/ /******************
14 Copyright (c) 2000 RIPE NCC
15
16 All Rights Reserved
17
18 Permission to use, copy, modify, and distribute this software and its
19 documentation for any purpose and without fee is hereby granted,
20 provided that the above copyright notice appear in all copies and that
21 both that copyright notice and this permission notice appear in
22 supporting documentation, and that the name of the author not be
23 used in advertising or publicity pertaining to distribution of the
24 software without specific, written prior permission.
25
26 THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
27 ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS; IN NO EVENT SHALL
28 AUTHOR BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY
29 DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
30 AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
31 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
32 ***************************************/
33 #include <stdio.h>
34 #include <unistd.h>
35 #include <sys/param.h>
36 #include <sys/types.h>
37 #include <netinet/in.h>
38 #include <arpa/inet.h>
39 #include <sys/wait.h>
40
41 #include "sk.h"
42
43
44 #define MAX_INPUT_SIZE 256
45 #define TIMEOUT 60
46 /* number of outstanding connections (backlog queue length) */
47 #define BACKLOG 10
48
49 #ifdef HAVE_OPTARG
50 extern char *optarg;
51 extern int optind, opterr, optopt;
52 #endif
53
54
55 int main(int argc, char **argv)
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56 {
57 char input[MAX_INPUT_SIZE], output[MAX_INPUT_SIZE+1];
58 char *mserver=NULL;
59 int listen_port=0, connect_port=0;
60 int listening_socket, client_socket, server_socket;
61 struct hostent *hptr;
62 struct sockaddr_in serv_addr;
63 struct in_addr *paddr;
64 int nwrite;
65 int ilen;
66 int c;
67 int errflg=0;
68 int pid;
69 char *filter_name="./ripe2rpsl";
70
71
72 if(argc<4) errflg++;
73
74 while ((c = getopt(argc, argv, "l:h:p:f:?")) != EOF)
75 switch (c) {
76 case 'l':
77 listen_port = htons(atoi(optarg));
78 break;
79 case 'h':
80 mserver = optarg;
81 break;
82 case 'p':
83 connect_port = htons(atoi(optarg));
84 break;
85 case 'f':
86 filter_name = optarg;
87 break;
88 case '?':
89 default :
90 errflg++;
91 break;
92 }
93 if (errflg) {
94 fprintf(stderr,"usage: mr -l listen_port -h mirror_server -p port [-f convertor]\n");
95 exit (2);
96 }
97
98 listening_socket = SK_getsock(SOCK_STREAM, listen_port, BACKLOG, INADDR_ANY);
99
100 while (1) {
101 client_socket = SK_accept_connection(listening_socket);
102 if(client_socket==-1) {fprintf(stderr, "cannot accept client\n"); continue; }
103 fprintf(stderr, "client connected\n");
104 /* get the input from the client */
105 SK_gets(client_socket, input, MAX_INPUT_SIZE);
106 fprintf(stderr, "input:[%s]\n", input);
107
108
109 /* create socket to connect to the server */
110 if ((server_socket=socket(AF_INET, SOCK_STREAM, 0))==-1){
111 perror("socket");
112 exit(1);
113 }
114 hptr=gethostbyname(mserver);
115 if (hptr) {
116 paddr=(struct in_addr *)hptr->h_addr;
117 bzero(&serv_addr, sizeof(serv_addr));
118 serv_addr.sin_family=AF_INET;
119 serv_addr.sin_port=connect_port;
120 memcpy(&serv_addr.sin_addr, paddr, sizeof(struct in_addr));
121 fprintf(stderr,"Trying %s port %d\n", inet_ntoa(serv_addr.sin_addr), connect_port);
122 if(connect(server_socket, (struct sockaddr *)&serv_addr, sizeof(serv_addr))==-1) {
123 perror("connect");
124 close(client_socket);
125 sleep(TIMEOUT);
126 continue;
127 }
128 }
129 fprintf(stderr, "Sending Invitation");
130
131 sprintf(output, "%s\n", input);
132 ilen=strlen(output);
133 nwrite=SK_write(server_socket, output, ilen);
134 if(nwrite != ilen) { perror("write"); exit(2); }
135 fprintf(stderr, "...sent \n");
136
137 if((pid=fork())==0){
138 close(listening_socket);
139 if(dup2(server_socket, 0)==-1) perror("dup2-serv"); ; /* provide input from the mirror server */
140 if(dup2(client_socket, 1)==-1) perror("dup2-clnt"); ; /* direct output to the client */
141 fprintf(stderr, "Executing convertor: %s\n", filter_name);
142 execlp(filter_name,filter_name, NULL);
143 fprintf(stderr, "Cannot execute %s\n", filter_name);
144 }
145 fprintf(stderr, "waiting for convertor to finish...\n");
146 wait(&pid); /* wait untill conversion finishes */
147 fprintf(stderr, "...converting stream done\n");
148
149 close(server_socket);
150 close(client_socket);
151
152
153 }/* main loop */
154
155 }