bin/mr/mirror_reflector.c
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FUNCTIONS
This source file includes following functions.
- main
1 /***************************************
2 $Revision: 1.4 $
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 int main(int argc, char **argv)
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50 {
51 char input[MAX_INPUT_SIZE], output[MAX_INPUT_SIZE+1];
52 char *mserver=NULL;
53 int listen_port=0, connect_port=0;
54 int listening_socket, client_socket, server_socket;
55 struct hostent *hptr;
56 struct sockaddr_in serv_addr;
57 struct in_addr *paddr;
58 int nwrite;
59 int ilen;
60 int c;
61 int errflg=0;
62 int pid;
63 char *filter_name="./ripe2rpsl";
64
65
66 if(argc<4) errflg++;
67
68 while ((c = getopt(argc, argv, "l:h:p:f:?")) != EOF)
69 switch (c) {
70 case 'l':
71 listen_port = htons(atoi(optarg));
72 break;
73 case 'h':
74 mserver = optarg;
75 break;
76 case 'p':
77 connect_port = htons(atoi(optarg));
78 break;
79 case 'f':
80 filter_name = optarg;
81 break;
82 case '?':
83 default :
84 errflg++;
85 break;
86 }
87 if (errflg) {
88 fprintf(stderr,"usage: mr -l listen_port -h mirror_server -p port [-f convertor]\n");
89 exit (2);
90 }
91
92 listening_socket = SK_getsock(SOCK_STREAM, listen_port, BACKLOG, INADDR_ANY);
93
94 while (1) {
95 client_socket = SK_accept_connection(listening_socket);
96 if(client_socket==-1) {fprintf(stderr, "cannot accept client\n"); continue; }
97 fprintf(stderr, "client connected\n");
98 /* get the input from the client */
99 SK_gets(client_socket, input, MAX_INPUT_SIZE);
100 fprintf(stderr, "input:[%s]\n", input);
101
102
103 /* create socket to connect to the server */
104 if ((server_socket=socket(AF_INET, SOCK_STREAM, 0))==-1){
105 perror("socket");
106 exit(1);
107 }
108 hptr=gethostbyname(mserver);
109 if (hptr) {
110 paddr=(struct in_addr *)hptr->h_addr;
111 bzero(&serv_addr, sizeof(serv_addr));
112 serv_addr.sin_family=AF_INET;
113 serv_addr.sin_port=connect_port;
114 memcpy(&serv_addr.sin_addr, paddr, sizeof(struct in_addr));
115 fprintf(stderr,"Trying %s port %d\n", inet_ntoa(serv_addr.sin_addr), connect_port);
116 if(connect(server_socket, (struct sockaddr *)&serv_addr, sizeof(serv_addr))==-1) {
117 perror("connect");
118 close(client_socket);
119 sleep(TIMEOUT);
120 continue;
121 }
122 }
123 fprintf(stderr, "Sending Invitation");
124
125 sprintf(output, "%s\n", input);
126 ilen=strlen(output);
127 nwrite=SK_write(server_socket, output, ilen);
128 if(nwrite != ilen) { perror("write"); exit(2); }
129 fprintf(stderr, "...sent \n");
130
131 if((pid=fork())==0){
132 close(listening_socket);
133 if(dup2(server_socket, 0)==-1) perror("dup2-serv"); ; /* provide input from the mirror server */
134 if(dup2(client_socket, 1)==-1) perror("dup2-clnt"); ; /* direct output to the client */
135 fprintf(stderr, "Executing convertor: %s\n", filter_name);
136 execlp(filter_name,filter_name, NULL);
137 fprintf(stderr, "Cannot execute %s\n", filter_name);
138 }
139 fprintf(stderr, "waiting for convertor to finish...\n");
140 wait(&pid); /* wait untill conversion finishes */
141 fprintf(stderr, "...converting stream done\n");
142
143 close(server_socket);
144 close(client_socket);
145
146
147 }/* main loop */
148
149 }