source: trunk/minix/commands/rlogind/setup.c@ 10

Last change on this file since 10 was 9, checked in by Mattia Monga, 13 years ago

Minix 3.1.2a

File size: 1.9 KB
Line 
1/*
2setup.c
3*/
4
5#include <sys/types.h>
6#include <sys/ioctl.h>
7#include <errno.h>
8#include <stdio.h>
9#include <stdlib.h>
10#include <string.h>
11#include <unistd.h>
12#include <net/netlib.h>
13#include <net/gen/in.h>
14#include <net/gen/inet.h>
15#include <net/gen/tcp.h>
16#include <net/gen/tcp_io.h>
17#include <net/gen/netdb.h>
18#include <net/gen/socket.h>
19#include "rlogind.h"
20
21static void getstr(char *buf, int cnt, char *errmsg);
22
23void authenticate(void)
24{
25 int result;
26 struct nwio_tcpconf tcpconf;
27 struct hostent *hostent;
28 char c;
29
30 /* Let's lookup the hostname for the connection. */
31 result= ioctl (0, NWIOGTCPCONF, &tcpconf);
32 if (result<0)
33 {
34 fprintf(stderr, "%s: ioctl(NWIOTCPCONF): %s\r\n",
35 prog_name, strerror(errno));
36 exit(1);
37 }
38 hostent= gethostbyaddr((char *)&tcpconf.nwtc_remaddr,
39 sizeof(tcpconf.nwtc_remaddr), AF_INET);
40 if (hostent)
41 {
42 strncpy(hostname, hostent->h_name, sizeof(hostname)-1);
43 hostname[sizeof(hostname)-1]= '\0';
44 }
45 else
46 {
47 strcpy(hostname, inet_ntoa(tcpconf.nwtc_remaddr));
48 }
49
50 authenticated = 0;
51
52 getstr(&c, 1, "protocol violation");
53 getstr(rusername, sizeof(rusername), "remuser too long");
54 getstr(lusername, sizeof(lusername), "locuser too long");
55 strcpy(term, "TERM=");
56 getstr(term+5, sizeof(term)-5, "Terminal type too long");
57
58#if DEBUG
59 fprintf(stderr, "got lu= %s, ru= %s, te= %s\r\n", lusername, rusername,
60 term);
61#endif
62 if (iruserok(tcpconf.nwtc_remaddr, 0, rusername, lusername) == 0)
63 authenticated = 1;
64}
65
66static void getstr(char *buf, int cnt, char *errmsg)
67{
68 char c;
69
70 errno= 0;
71 do
72 {
73 if (read(0, &c, 1) != 1)
74 fatal(1, "read failed", errno);
75 cnt--;
76 if (cnt < 0)
77 fatal(1, errmsg, 0);
78 *buf++= c;
79 } while(c != 0);
80}
81
82void tcp_urg(int fd, int on)
83{
84 struct nwio_tcpopt tcpopt;
85
86 tcpopt.nwto_flags= on ? (NWTO_BSD_URG | NWTO_SND_URG) : NWTO_SND_NOTURG;
87 if (ioctl(1, NWIOSTCPOPT, &tcpopt) == -1)
88 {
89 fprintf(stderr, "rlogind: NWIOSTCPOPT failed: %s\r\n",
90 strerror(errno));
91 }
92}
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