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Diffstat (limited to 'mnc.c')
-rw-r--r-- | mnc.c | 148 |
1 files changed, 148 insertions, 0 deletions
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1 | /* mnc: mini-netcat - built from the ground up for LRP | ||
2 | Copyright (C) 1998 Charles P. Wright | ||
3 | |||
4 | 0.0.1 6K It works. | ||
5 | 0.0.2 5K Smaller and you can also check the exit condition if you wish. | ||
6 | |||
7 | |||
8 | 19980918 Busy Boxed! Dave Cinege | ||
9 | |||
10 | This program is free software; you can redistribute it and/or modify | ||
11 | it under the terms of the GNU General Public License as published by | ||
12 | the Free Software Foundation; either version 2 of the License, or | ||
13 | (at your option) any later version. | ||
14 | |||
15 | This program is distributed in the hope that it will be useful, | ||
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
18 | GNU General Public License for more details. | ||
19 | |||
20 | You should have received a copy of the GNU General Public License | ||
21 | along with this program; if not, write to the Free Software | ||
22 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | ||
23 | |||
24 | */ | ||
25 | #include "internal.h" | ||
26 | #include <stdio.h> | ||
27 | #include <stdlib.h> | ||
28 | #include <unistd.h> | ||
29 | |||
30 | #include <sys/types.h> | ||
31 | #include <sys/socket.h> | ||
32 | #include <netinet/in.h> | ||
33 | #include <arpa/inet.h> | ||
34 | #include <netdb.h> | ||
35 | #include <sys/time.h> | ||
36 | #include <sys/ioctl.h> | ||
37 | |||
38 | const char mnc_usage[] = | ||
39 | "mini-netcat 0.0.1 -- Open pipe to IP:port\n" | ||
40 | "\tmnc [IP] [port]\n"; | ||
41 | |||
42 | int | ||
43 | mnc_main(struct FileInfo * i, int argc, char **argv) | ||
44 | { | ||
45 | |||
46 | int sfd; | ||
47 | int result; | ||
48 | int len; | ||
49 | int pid; | ||
50 | char ch; | ||
51 | |||
52 | struct sockaddr_in address; | ||
53 | struct hostent *hostinfo; | ||
54 | |||
55 | #ifdef SELECT | ||
56 | fd_set readfds, testfds; | ||
57 | #endif | ||
58 | |||
59 | sfd = socket(AF_INET, SOCK_STREAM, 0); | ||
60 | |||
61 | hostinfo = (struct hostent *) gethostbyname(argv[1]); | ||
62 | |||
63 | if (!hostinfo) | ||
64 | { | ||
65 | exit(1); | ||
66 | } | ||
67 | |||
68 | address.sin_family = AF_INET; | ||
69 | address.sin_addr = *(struct in_addr *) *hostinfo->h_addr_list; | ||
70 | address.sin_port = htons(atoi(argv[2])); | ||
71 | |||
72 | len = sizeof(address); | ||
73 | |||
74 | result = connect(sfd, (struct sockaddr *)&address, len); | ||
75 | |||
76 | if (result < 0) | ||
77 | { | ||
78 | exit(2); | ||
79 | } | ||
80 | |||
81 | #ifdef SELECT | ||
82 | FD_ZERO(&readfds); | ||
83 | FD_SET(sfd, &readfds); | ||
84 | FD_SET(fileno(stdin), &readfds); | ||
85 | |||
86 | while(1) | ||
87 | { | ||
88 | int fd; | ||
89 | int nread; | ||
90 | |||
91 | testfds = readfds; | ||
92 | |||
93 | result = select(FD_SETSIZE, &testfds, (fd_set *) NULL, (fd_set *) NULL, (struct timeval *) 0); | ||
94 | |||
95 | if(result < 1) | ||
96 | { | ||
97 | exit(3); | ||
98 | } | ||
99 | |||
100 | for(fd = 0; fd < FD_SETSIZE; fd++) | ||
101 | { | ||
102 | if(FD_ISSET(fd,&testfds)) | ||
103 | { | ||
104 | ioctl(fd, FIONREAD, &nread); | ||
105 | |||
106 | if (nread == 0) | ||
107 | exit(0); | ||
108 | |||
109 | if(fd == sfd) | ||
110 | { | ||
111 | read(sfd, &ch, 1); | ||
112 | write(fileno(stdout), &ch, 1); | ||
113 | } | ||
114 | else | ||
115 | { | ||
116 | read(fileno(stdin), &ch, 1); | ||
117 | write(sfd, &ch, 1); | ||
118 | } | ||
119 | } | ||
120 | } | ||
121 | } | ||
122 | #else | ||
123 | pid = fork(); | ||
124 | |||
125 | if (!pid) | ||
126 | { | ||
127 | int retval; | ||
128 | retval = 1; | ||
129 | while(retval == 1) | ||
130 | { | ||
131 | retval = read(fileno(stdin), &ch, 1); | ||
132 | write(sfd, &ch, 1); | ||
133 | } | ||
134 | } | ||
135 | else | ||
136 | { | ||
137 | int retval; | ||
138 | retval = 1; | ||
139 | while(retval == 1) | ||
140 | { | ||
141 | retval = read(sfd, &ch, 1); | ||
142 | write(fileno(stdout), &ch, 1); | ||
143 | } | ||
144 | } | ||
145 | |||
146 | exit(0); | ||
147 | #endif | ||
148 | } | ||