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bootpd.h revision 1.1 
      1 /************************************************************************
      2           Copyright 1988, 1991 by Carnegie Mellon University
      3 
      4                           All Rights Reserved
      5 
      6 Permission to use, copy, modify, and distribute this software and its
      7 documentation for any purpose and without fee is hereby granted, provided
      8 that the above copyright notice appear in all copies and that both that
      9 copyright notice and this permission notice appear in supporting
     10 documentation, and that the name of Carnegie Mellon University not be used
     11 in advertising or publicity pertaining to distribution of the software
     12 without specific, written prior permission.
     13 
     14 CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
     15 SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
     16 IN NO EVENT SHALL CMU BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
     17 DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
     18 PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
     19 ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
     20 SOFTWARE.
     21 ************************************************************************/
     22 
     23 
     24 /*
     25  * bootpd.h -- common header file for all the modules of the bootpd program.
     26  */
     27 
     28 #include "bptypes.h"
     29 #include "hash.h"
     30 #include "hwaddr.h"
     31 
     32 #ifndef TRUE
     33 #define TRUE	1
     34 #endif
     35 #ifndef FALSE
     36 #define FALSE	0
     37 #endif
     38 
     39 #ifndef PRIVATE
     40 #define PRIVATE static
     41 #endif
     42 
     43 #ifndef SIGUSR1
     44 #define SIGUSR1			 30	/* From 4.3 <signal.h> */
     45 #endif
     46 
     47 #define MAXSTRINGLEN		 80	/* Max string length */
     48 
     49 
     50 /*
     51  * Return pointer to static string which gives full network error message.
     52  */
     53 #define get_network_errmsg get_errmsg
     54 
     55 
     56 /*
     57  * Data structure used to hold an arbitrary-lengthed list of IP addresses.
     58  * The list may be shared among multiple hosts by setting the linkcount
     59  * appropriately.
     60  */
     61 
     62 struct in_addr_list {
     63     unsigned int	linkcount, addrcount;
     64     struct in_addr	addr[1];		/* Dynamically extended */
     65 };
     66 
     67 
     68 /*
     69  * Data structures used to hold shared strings and shared binary data.
     70  * The linkcount must be set appropriately.
     71  */
     72 
     73 struct shared_string {
     74     unsigned int	linkcount;
     75     char		string[1];		/* Dynamically extended */
     76 };
     77 
     78 struct shared_bindata {
     79     unsigned int	linkcount, length;
     80     byte		data[1];		/* Dynamically extended */
     81 };
     82 
     83 
     84 /*
     85  * Flag structure which indicates which symbols have been defined for a
     86  * given host.  This information is used to determine which data should or
     87  * should not be reported in the bootp packet vendor info field.
     88  */
     89 
     90 struct flag {
     91     unsigned	bootfile	:1,
     92 		bootserver	:1,
     93 		bootsize	:1,
     94 		bootsize_auto	:1,
     95 		cookie_server	:1,
     96 		domain_server	:1,
     97 		gateway		:1,
     98 		generic		:1,
     99 		haddr		:1,
    100 		homedir		:1,
    101 		htype		:1,
    102 		impress_server	:1,
    103 		iaddr		:1,
    104 		log_server	:1,
    105 		lpr_server	:1,
    106 		name_server	:1,
    107 		name_switch	:1,
    108 		rlp_server	:1,
    109 		send_name	:1,
    110 		subnet_mask	:1,
    111 		tftpdir		:1,
    112 		time_offset	:1,
    113 		time_server	:1,
    114 		dump_file	:1,
    115 		domain_name	:1,
    116 		swap_server	:1,
    117 		root_path	:1,
    118 		exten_file	:1,
    119 		reply_addr	:1,
    120 		nis_domain	:1,
    121 		nis_server	:1,
    122 		ntp_server	:1,
    123 		exec_file	:1,
    124 		/* XXX - Add new tags here */
    125 		vm_cookie	:1;
    126 };
    127 
    128 
    129 
    131 /*
    132  * The flags structure contains TRUE flags for all the fields which
    133  * are considered valid, regardless of whether they were explicitly
    134  * specified or indirectly inferred from another entry.
    135  *
    136  * The gateway and the various server fields all point to a shared list of
    137  * IP addresses.
    138  *
    139  * The hostname, home directory, and bootfile are all shared strings.
    140  *
    141  * The generic data field is a shared binary data structure.  It is used to
    142  * hold future RFC1048 vendor data until bootpd is updated to understand it.
    143  *
    144  * The vm_cookie field specifies the four-octet vendor magic cookie to use
    145  * if it is desired to always send the same response to a given host.
    146  *
    147  * Hopefully, the rest is self-explanatory.
    148  */
    149 
    150 struct host {
    151     unsigned		    linkcount;		/* hash list inserts */
    152     struct flag		    flags;		/* ALL valid fields */
    153     struct in_addr_list	    *cookie_server,
    154 			    *domain_server,
    155 			    *gateway,
    156 			    *impress_server,
    157 			    *log_server,
    158 			    *lpr_server,
    159 			    *name_server,
    160 			    *rlp_server,
    161 			    *time_server,
    162 			    *nis_server,
    163 			    *ntp_server;
    164     struct shared_string    *bootfile,
    165 			    *hostname,
    166 			    *domain_name,
    167 			    *homedir,
    168 			    *tftpdir,
    169 			    *dump_file,
    170 			    *exten_file,
    171 			    *root_path,
    172 			    *nis_domain,
    173 			    *exec_file;
    174     struct shared_bindata   *generic;
    175     byte		    vm_cookie[4],
    176 			    htype,  /* RFC826 says this should be 16-bits but
    177 				       RFC951 only allocates 1 byte. . . */
    178 			    haddr[MAXHADDRLEN];
    179     int32		    time_offset;
    180     unsigned int	    bootsize;
    181     struct in_addr	    bootserver,
    182 			    iaddr,
    183 			    swap_server,
    184 			    reply_addr,
    185 			    subnet_mask;
    186     /* XXX - Add new tags here (or above as appropriate) */
    187 };
    188 
    189 
    191 
    192 /*
    193  * Variables shared among modules.
    194  */
    195 
    196 extern int debug;
    197 extern char *bootptab;
    198 extern char *progname;
    199 
    200 extern u_char vm_cmu[4];
    201 extern u_char vm_rfc1048[4];
    202 
    203 extern hash_tbl *hwhashtable;
    204 extern hash_tbl *iphashtable;
    205 extern hash_tbl *nmhashtable;
    206 
    207