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1 /* ========================================================================
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2 * Copyright 1988-2006 University of Washington
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3 *
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4 * Licensed under the Apache License, Version 2.0 (the "License");
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5 * you may not use this file except in compliance with the License.
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6 * You may obtain a copy of the License at
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7 *
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8 * http://www.apache.org/licenses/LICENSE-2.0
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9 *
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10 *
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11 * ========================================================================
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12 */
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13
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14 /*
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15 * Program: Operating-system dependent routines -- MS-DOS (PC/TCP) version
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16 *
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17 * Author: Mark Crispin
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18 * Networks and Distributed Computing
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19 * Computing & Communications
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20 * University of Washington
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21 * Administration Building, AG-44
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22 * Seattle, WA 98195
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23 * Internet: MRC@CAC.Washington.EDU
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24 *
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25 * Date: 11 April 1989
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26 * Last Edited: 30 August 2006
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27 */
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28
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29 /* Private function prototypes */
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30
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31 #include "tcp_dos.h" /* must be before osdep includes tcp.h */
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32 #include "mail.h"
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33 #include "osdep.h"
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34 #include <time.h>
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35 #include <errno.h>
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36 #include <fcntl.h>
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37 #include <sys\stat.h>
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38 #include <sys\timeb.h>
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39 #include <4bsddefs.h>
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40 #include <sys\socket.h>
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41 #include <errno.h>
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42 #include <arpa\inet.h>
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43 #include <netinet\in.h>
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44 #include <netdb.h>
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45 #include "misc.h"
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46
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47
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48 #include "fs_dos.c"
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49 #include "ftl_dos.c"
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50 #include "nl_dos.c"
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51 #include "env_dos.c"
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52 #undef write
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53 #include "tcp_dos.c"
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54
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55
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56 /* Return my local host name
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57 * Returns: my local host name
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58 */
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59
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60 char *mylocalhost (void)
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61 {
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62 if (!myLocalHost) { /* known yet */
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63 char *s,tmp[MAILTMPLEN];
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64 long myip;
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65 /* see if known host name */
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66 if (!gethostname (tmp,MAILTMPLEN-1)) s = tmp;
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67 /* no, try IP address */
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68 else if (myip = gethostid ()) {
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69 struct in_addr in;
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70 in.s_addr = myip;
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71 sprintf (s = tmp,"[%s]",inet_ntoa (in));
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72 }
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73 /* older kernel, look harder. */
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74 else if (getconf ("ifcust","ip-address",tmp+1,MAILTMPLEN-2)) {
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75 *(s = tmp) = '['; /* wrap the brackets around it */
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76 strcat (tmp,"]");
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77 }
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78 else s = "random-pc"; /* say what? */
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79 myLocalHost = cpystr (s); /* record for subsequent use */
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80 }
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81 return myLocalHost;
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82 }
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83
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84
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85 /* Look up host address
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86 * Accepts: pointer to pointer to host name
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87 * socket address block
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88 * Returns: non-zero with host address in socket, official host name in host;
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89 * else NIL
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90 */
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91
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92 long lookuphost (char **host,struct sockaddr_in *sin)
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93 {
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94 long ret = -1;
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95 char tmp[MAILTMPLEN];
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96 struct hostent *hn = gethostbyname (lcase (strcpy (tmp,*host)));
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97 if (!hn) return NIL; /* got a host name? */
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98 *host = cpystr (hn->h_name); /* set official name */
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99 /* copy host addresses */
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100 memcpy (&sin->sin_addr,hn->h_addr,hn->h_length);
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101 return T;
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102 }
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