utils/mr/mr.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) 2000,2001,2002 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 struct hostent *hptr;
59 struct sockaddr_in serv_addr;
60 struct in_addr *paddr;
61 int res;
62 struct timeval timeout;
63 int ilen;
64 int c;
65 int errflg=0;
66 int pid;
67 char *filter_name="./ripe2rpsl";
68
69
70 if(argc<4) errflg++;
71
72 while ((c = getopt(argc, argv, "l:h:p:f:?")) != EOF)
73 switch (c) {
74 case 'l':
75 listen_port = atoi(optarg);
76 break;
77 case 'h':
78 mserver = optarg;
79 break;
80 case 'p':
81 connect_port = htons(atoi(optarg));
82 break;
83 case 'f':
84 filter_name = optarg;
85 break;
86 case '?':
87 default :
88 errflg++;
89 break;
90 }
91 if (errflg) {
92 fprintf(stderr,"usage: mr -l listen_port -h mirror_server -p port [-f convertor]\n");
93 exit (2);
94 }
95
96 listening_socket = SK_getsock(SOCK_STREAM, listen_port, BACKLOG, INADDR_ANY);
97 bzero(&timeout, sizeof(timeout));
98 timeout.tv_sec=TIMEOUT;
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 close(server_socket);
126 sleep(TIMEOUT);
127 continue;
128 }
129 } else {
130 /* resolver error */
131 fprintf(stderr,"Cannot resolve name %s\n", mserver);
132 close(client_socket);
133 close(server_socket);
134 sleep(TIMEOUT);
135 continue;
136 }
137
138 fprintf(stderr, "Sending Invitation");
139
140 sprintf(output, "%s\n", input);
141 res = SK_puts(server_socket, output, &timeout);
142 if(res < 0) {
143 perror("write");
144 sleep(TIMEOUT);
145 continue;
146 }
147 fprintf(stderr, "...sent \n");
148
149 if((pid=fork())==0){
150 close(listening_socket);
151 if(dup2(server_socket, 0)==-1) perror("dup2-serv"); ; /* provide input from the mirror server */
152 if(dup2(client_socket, 1)==-1) perror("dup2-clnt"); ; /* direct output to the client */
153 fprintf(stderr, "Executing convertor: %s\n", filter_name);
154 execlp(filter_name,filter_name, NULL);
155 fprintf(stderr, "Cannot execute %s\n", filter_name);
156 }
157 fprintf(stderr, "waiting for convertor to finish...\n");
158 wait(&pid); /* wait untill conversion finishes */
159 fprintf(stderr, "...converting stream done\n");
160
161 close(server_socket);
162 close(client_socket);
163
164
165 }/* main loop */
166
167 }