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DEFINITIONS
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) 2000,2001,2002 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
34 #include "rip.h"
35
36 #include <stdio.h>
37 #include <unistd.h>
38 #include <sys/param.h>
39 #include <sys/types.h>
40 #include <netinet/in.h>
41 #include <arpa/inet.h>
42 #include <sys/wait.h>
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 extern char *optarg;
50
51
52 int main(int argc, char **argv)
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53 {
54 char input[MAX_INPUT_SIZE], output[MAX_INPUT_SIZE+1];
55 char *mserver=NULL;
56 int listen_port=0, connect_port=0;
57 int listening_socket, client_socket, server_socket;
58 sk_conn_st client_conn;
59 struct hostent *hptr;
60 struct sockaddr_in serv_addr;
61 struct in_addr *paddr;
62 int res;
63 struct timeval timeout;
64 int ilen;
65 int c;
66 int errflg=0;
67 int pid;
68 char *filter_name="./ripe2rpsl";
69
70
71 if(argc<4) errflg++;
72
73 while ((c = getopt(argc, argv, "l:h:p:f:?")) != EOF)
74 switch (c) {
75 case 'l':
76 listen_port = atoi(optarg);
77 break;
78 case 'h':
79 mserver = optarg;
80 break;
81 case 'p':
82 connect_port = htons(atoi(optarg));
83 break;
84 case 'f':
85 filter_name = optarg;
86 break;
87 case '?':
88 default :
89 errflg++;
90 break;
91 }
92 if (errflg) {
93 fprintf(stderr,"usage: mr -l listen_port -h mirror_server -p port [-f convertor]\n");
94 exit (2);
95 }
96
97 listening_socket = SK_getsock(SOCK_STREAM, listen_port, BACKLOG, INADDR_ANY);
98 bzero(&timeout, sizeof(timeout));
99 timeout.tv_sec=TIMEOUT;
100
101 while (1) {
102 client_socket = SK_accept_connection(listening_socket);
103 if(client_socket==-1) {fprintf(stderr, "cannot accept client\n"); continue; }
104 fprintf(stderr, "client connected\n");
105 SK_cd_make(&client_conn, client_socket, 0);
106 /* get the input from the client */
107 SK_cd_gets(&client_conn, input, MAX_INPUT_SIZE);
108 fprintf(stderr, "input:[%s]\n", input);
109
110
111 /* create socket to connect to the server */
112 if ((server_socket=socket(AF_INET, SOCK_STREAM, 0))==-1){
113 perror("socket");
114 exit(1);
115 }
116 hptr=gethostbyname(mserver);
117 if (hptr) {
118 paddr=(struct in_addr *)hptr->h_addr;
119 bzero(&serv_addr, sizeof(serv_addr));
120 serv_addr.sin_family=AF_INET;
121 serv_addr.sin_port=connect_port;
122 memcpy(&serv_addr.sin_addr, paddr, sizeof(struct in_addr));
123 fprintf(stderr,"Trying %s port %d\n", inet_ntoa(serv_addr.sin_addr), connect_port);
124 if(connect(server_socket, (struct sockaddr *)&serv_addr, sizeof(serv_addr))==-1) {
125 perror("connect");
126 close(client_socket);
127 close(server_socket);
128 sleep(TIMEOUT);
129 continue;
130 }
131 } else {
132 /* resolver error */
133 fprintf(stderr,"Cannot resolve name %s\n", mserver);
134 close(client_socket);
135 close(server_socket);
136 sleep(TIMEOUT);
137 continue;
138 }
139
140 fprintf(stderr, "Sending Invitation");
141
142 sprintf(output, "%s\n", input);
143 res = SK_puts(server_socket, output, &timeout);
144 if(res < 0) {
145 perror("write");
146 sleep(TIMEOUT);
147 continue;
148 }
149 fprintf(stderr, "...sent \n");
150
151 if((pid=fork())==0){
152 close(listening_socket);
153 if(dup2(server_socket, 0)==-1) perror("dup2-serv"); ; /* provide input from the mirror server */
154 if(dup2(client_socket, 1)==-1) perror("dup2-clnt"); ; /* direct output to the client */
155 fprintf(stderr, "Executing convertor: %s\n", filter_name);
156 execlp(filter_name,filter_name, NULL);
157 fprintf(stderr, "Cannot execute %s\n", filter_name);
158 }
159 fprintf(stderr, "waiting for convertor to finish...\n");
160 wait(&pid); /* wait untill conversion finishes */
161 fprintf(stderr, "...converting stream done\n");
162
163 close(server_socket);
164 close(client_socket);
165
166
167 }/* main loop */
168
169 }