92 lines
1.9 KiB
C
92 lines
1.9 KiB
C
/*
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setup.c
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*/
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#include <sys/types.h>
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#include <sys/ioctl.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <net/netlib.h>
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#include <net/gen/in.h>
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#include <net/gen/inet.h>
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#include <net/gen/tcp.h>
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#include <net/gen/tcp_io.h>
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#include <net/gen/netdb.h>
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#include <net/gen/socket.h>
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#include "rlogind.h"
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static void getstr(char *buf, int cnt, char *errmsg);
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void authenticate(void)
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{
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int result;
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struct nwio_tcpconf tcpconf;
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struct hostent *hostent;
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char c;
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/* Let's lookup the hostname for the connection. */
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result= ioctl (0, NWIOGTCPCONF, &tcpconf);
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if (result<0)
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{
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fprintf(stderr, "%s: ioctl(NWIOTCPCONF): %s\r\n",
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prog_name, strerror(errno));
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exit(1);
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}
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hostent= gethostbyaddr((char *)&tcpconf.nwtc_remaddr,
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sizeof(tcpconf.nwtc_remaddr), AF_INET);
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if (hostent)
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{
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strncpy(hostname, hostent->h_name, sizeof(hostname)-1);
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hostname[sizeof(hostname)-1]= '\0';
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}
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else
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{
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strcpy(hostname, inet_ntoa(tcpconf.nwtc_remaddr));
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}
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authenticated = 0;
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getstr(&c, 1, "protocol violation");
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getstr(rusername, sizeof(rusername), "remuser too long");
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getstr(lusername, sizeof(lusername), "locuser too long");
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strcpy(term, "TERM=");
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getstr(term+5, sizeof(term)-5, "Terminal type too long");
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#if DEBUG
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fprintf(stderr, "got lu= %s, ru= %s, te= %s\r\n", lusername, rusername,
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term);
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#endif
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if (iruserok(tcpconf.nwtc_remaddr, 0, rusername, lusername) == 0)
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authenticated = 1;
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}
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static void getstr(char *buf, int cnt, char *errmsg)
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{
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char c;
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errno= 0;
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do
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{
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if (read(0, &c, 1) != 1)
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fatal(1, "read failed", errno);
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cnt--;
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if (cnt < 0)
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fatal(1, errmsg, 0);
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*buf++= c;
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} while(c != 0);
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}
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void tcp_urg(int fd, int on)
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{
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struct nwio_tcpopt tcpopt;
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tcpopt.nwto_flags= on ? (NWTO_BSD_URG | NWTO_SND_URG) : NWTO_SND_NOTURG;
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if (ioctl(1, NWIOSTCPOPT, &tcpopt) == -1)
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{
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fprintf(stderr, "rlogind: NWIOSTCPOPT failed: %s\r\n",
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strerror(errno));
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}
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}
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