bin/mr/mirror_reflector.c
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FUNCTIONS
This source file includes following functions.
- main
1 /***************************************
2 $Revision: 1.3 $
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
47 int main(int argc, char **argv)
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48 {
49 char input[MAX_INPUT_SIZE], output[MAX_INPUT_SIZE+1];
50 char *mserver=NULL;
51 int listen_port=0, connect_port=0;
52 int listening_socket, client_socket, server_socket;
53 struct hostent *hptr;
54 struct sockaddr_in serv_addr;
55 struct in_addr *paddr;
56 int nread, nwrite;
57 int ilen;
58 int c;
59 sk_conn_st condat;
60 int errflg=0;
61 int pid;
62 char *filter_name="./ripe2rpsl";
63
64
65 if(argc<4) errflg++;
66
67 while ((c = getopt(argc, argv, "l:h:p:f:?")) != EOF)
68 switch (c) {
69 case 'l':
70 listen_port = htons(atoi(optarg));
71 break;
72 case 'h':
73 mserver = optarg;
74 break;
75 case 'p':
76 connect_port = htons(atoi(optarg));
77 break;
78 case 'f':
79 filter_name = optarg;
80 break;
81 case '?':
82 default :
83 errflg++;
84 break;
85 }
86 if (errflg) {
87 fprintf(stderr,"usage: mr -l listen_port -h mirror_server -p port [-f convertor]\n");
88 exit (2);
89 }
90
91 listening_socket = SK_getsock(SOCK_STREAM, listen_port, INADDR_ANY);
92
93 while (1) {
94 client_socket = SK_accept_connection(listening_socket);
95 if(client_socket==-1) {fprintf(stderr, "cannot accept client\n"); continue; }
96 fprintf(stderr, "client connected\n");
97 /* get the input from the client */
98 SK_gets(client_socket, input, MAX_INPUT_SIZE);
99 fprintf(stderr, "input:[%s]\n", input);
100
101
102 /* create socket to connect to the server */
103 if ((server_socket=socket(AF_INET, SOCK_STREAM, 0))==-1){
104 perror("socket");
105 exit(1);
106 }
107 hptr=gethostbyname(mserver);
108 if (hptr) {
109 paddr=(struct in_addr *)hptr->h_addr;
110 bzero(&serv_addr, sizeof(serv_addr));
111 serv_addr.sin_family=AF_INET;
112 serv_addr.sin_port=connect_port;
113 memcpy(&serv_addr.sin_addr, paddr, sizeof(struct in_addr));
114 fprintf(stderr,"Trying %s port %d\n", inet_ntoa(serv_addr.sin_addr), connect_port);
115 if(connect(server_socket, (struct sockaddr *)&serv_addr, sizeof(serv_addr))==-1) {
116 perror("connect");
117 close(client_socket);
118 sleep(TIMEOUT);
119 continue;
120 }
121 }
122 fprintf(stderr, "Sending Invitation");
123
124 sprintf(output, "%s\n", input);
125 ilen=strlen(output);
126 nwrite=SK_write(server_socket, output, ilen);
127 if(nwrite != ilen) { perror("write"); exit(2); }
128 fprintf(stderr, "...sent \n");
129
130 if((pid=fork())==0){
131 close(listening_socket);
132 if(dup2(server_socket, 0)==-1) perror("dup2-serv"); ; /* provide input from the mirror server */
133 if(dup2(client_socket, 1)==-1) perror("dup2-clnt"); ; /* direct output to the client */
134 fprintf(stderr, "Executing convertor: %s\n", filter_name);
135 execlp(filter_name,filter_name, NULL);
136 fprintf(stderr, "Cannot execute %s\n", filter_name);
137 }
138 fprintf(stderr, "waiting for convertor to finish...\n");
139 wait(&pid); /* wait untill conversion finishes */
140 fprintf(stderr, "...converting stream done\n");
141
142 close(server_socket);
143 close(client_socket);
144
145
146 }/* main loop */
147
148 }