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- #ifndef _BLURB_
- #define _BLURB_
- /************************************************************************
- Copyright 1988, 1991 by Carnegie Mellon University
-
- All Rights Reserved
-
- Permission to use, copy, modify, and distribute this software and its
- documentation for any purpose and without fee is hereby granted, provided
- that the above copyright notice appear in all copies and that both that
- copyright notice and this permission notice appear in supporting
- documentation, and that the name of Carnegie Mellon University not be used
- in advertising or publicity pertaining to distribution of the software
- without specific, written prior permission.
-
- CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
- SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
- IN NO EVENT SHALL CMU BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
- DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
- PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
- ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
- SOFTWARE.
- ************************************************************************/
- #endif /* _BLURB_ */
-
-
- #ifndef lint
- static char rcsid[] = "$Header: /afs/andrew.cmu.edu/netdev/src/cmu/bootp-public/RCS/readfile.c,v 1.3 1991/11/01 10:02:29 ww0n Exp ww0n $";
- #endif
-
-
- /*
- * bootpd configuration file reading code.
- *
- * The routines in this file deal with reading, interpreting, and storing
- * the information found in the bootpd configuration file (usually
- * /etc/bootptab).
- */
-
-
- #include <stdio.h>
- #ifdef SVR4
- #include <string.h>
- #else
- #include <strings.h>
- #endif
- #include <ctype.h>
- #include <sys/errno.h>
- #include <sys/types.h>
- #include <sys/stat.h>
- #include <sys/file.h>
- #include <sys/time.h>
- #include <netinet/in.h>
- #ifdef SYSLOG
- #include <syslog.h>
- #endif
- #include "bootp.h"
- #include "hash.h"
- #include "bootpd.h"
-
- #ifdef SVR4
- #define bcopy(a,b,c) memcpy(b,a,c)
- #define bzero(p,l) memset(p,0,l)
- #define bcmp(a,b,c) memcmp(a,b,c)
- #endif
-
- #define SUCCESS 0
- #define E_END_OF_ENTRY (-1)
- #define E_SYNTAX_ERROR (-2)
- #define E_UNKNOWN_SYMBOL (-3)
- #define E_BAD_IPADDR (-4)
- #define E_BAD_HADDR (-5)
- #define E_BAD_SMASK (-6)
- #define E_BAD_TIMEOFF (-7)
- #define E_BAD_VM_COOKIE (-8)
- #define E_BAD_HTYPE (-9)
- #define E_BAD_BOOTSIZE (-10)
- #define E_BAD_BOOT_SERVER (-11)
- #define E_BAD_HOMEDIR (-12)
- #define E_BAD_TFTPDIR (-13)
-
- #define SYM_NULL 0
- #define SYM_BOOTFILE 1
- #define SYM_COOKIE_SERVER 2
- #define SYM_DOMAIN_SERVER 3
- #define SYM_GATEWAY 4
- #define SYM_HADDR 5
- #define SYM_HOMEDIR 6
- #define SYM_HTYPE 7
- #define SYM_IMPRESS_SERVER 8
- #define SYM_IPADDR 9
- #define SYM_LOG_SERVER 10
- #define SYM_LPR_SERVER 11
- #define SYM_NAME_SERVER 12
- #define SYM_RLP_SERVER 13
- #define SYM_SUBNET_MASK 14
- #define SYM_TIME_OFFSET 15
- #define SYM_TIME_SERVER 16
- #define SYM_VENDOR_MAGIC 17
- #define SYM_SIMILAR_ENTRY 18
- #define SYM_NAME_SWITCH 19
- #define SYM_BOOTSIZE 20
- #define SYM_BOOT_SERVER 22
- #define SYM_TFTPDIR 23
-
- #define OP_ADDITION 1 /* Operations on tags */
- #define OP_DELETION 2
- #define OP_BOOLEAN 3
-
- #define MAXINADDRS 16 /* Max size of an IP address list */
- #define MAXBUFLEN 64 /* Max temp buffer space */
- #define MAXENTRYLEN 2048 /* Max size of an entire entry */
-
- PRIVATE int process_entry();
- PRIVATE eval_symbol();
- PRIVATE boolean goodname();
- PRIVATE prs_inetaddr();
- PRIVATE int interp_byte();
-
-
- /*
- * Structure used to map a configuration-file symbol (such as "ds") to a
- * unique integer.
- */
-
- struct symbolmap {
- char *symbol;
- int symbolcode;
- };
-
-
- struct htypename {
- char *name;
- byte htype;
- };
-
-
- PRIVATE int nhosts; /* Number of hosts (/w hw or IP address) */
- PRIVATE int nentries; /* Total number of entries */
- PRIVATE long modtime = 0; /* Last modification time of bootptab */
-
-
- /*
- * List of symbolic names used in the bootptab file. The order and actual
- * values of the symbol codes (SYM_. . .) are unimportant, but they must
- * all be unique.
- */
-
- PRIVATE struct symbolmap symbol_list[] = {
- { "bf", SYM_BOOTFILE },
- { "bs", SYM_BOOTSIZE },
- { "cs", SYM_COOKIE_SERVER },
- { "ds", SYM_DOMAIN_SERVER },
- { "gw", SYM_GATEWAY },
- { "ha", SYM_HADDR },
- { "hd", SYM_HOMEDIR },
- { "hn", SYM_NAME_SWITCH },
- { "ht", SYM_HTYPE },
- { "im", SYM_IMPRESS_SERVER },
- { "ip", SYM_IPADDR },
- { "lg", SYM_LOG_SERVER },
- { "lp", SYM_LPR_SERVER },
- { "ns", SYM_NAME_SERVER },
- { "rl", SYM_RLP_SERVER },
- { "sa", SYM_BOOT_SERVER },
- { "sm", SYM_SUBNET_MASK },
- { "tc", SYM_SIMILAR_ENTRY },
- { "td", SYM_TFTPDIR },
- { "to", SYM_TIME_OFFSET },
- { "ts", SYM_TIME_SERVER },
- { "vm", SYM_VENDOR_MAGIC },
- };
-
-
- /*
- * List of symbolic names for hardware types. Name translates into
- * hardware type code listed with it. Names must begin with a letter
- * and must be all lowercase. This is searched linearly, so put
- * commonly-used entries near the beginning.
- */
-
- PRIVATE struct htypename htnamemap[] = {
- { "ethernet", HTYPE_ETHERNET },
- { "ethernet3", HTYPE_EXP_ETHERNET },
- { "ether", HTYPE_ETHERNET },
- { "ether3", HTYPE_EXP_ETHERNET },
- { "ieee802", HTYPE_IEEE802 },
- { "tr", HTYPE_IEEE802 },
- { "token-ring", HTYPE_IEEE802 },
- { "pronet", HTYPE_PRONET },
- { "chaos", HTYPE_CHAOS },
- { "arcnet", HTYPE_ARCNET },
- { "ax.25", HTYPE_AX25 }
- };
-
-
-
- /*
- * Externals and forward declarations.
- */
-
- extern char *malloc();
- extern boolean iplookcmp();
- extern int errno;
-
- PRIVATE char *smalloc();
- PRIVATE void fill_defaults();
- PRIVATE void del_string();
- PRIVATE void del_bindata();
- PRIVATE void del_iplist();
- PRIVATE void free_host();
- PRIVATE u_long get_u_long();
- PRIVATE void process_generic();
- PRIVATE char *get_string();
- PRIVATE struct shared_string *get_shared_string();
- PRIVATE void read_entry();
- PRIVATE boolean nullcmp();
- PRIVATE boolean nmcmp();
- PRIVATE boolean hwinscmp();
- PRIVATE void adjust();
- PRIVATE void eat_whitespace();
- PRIVATE void makelower();
- PRIVATE struct in_addr_list *get_addresses();
- PRIVATE byte *prs_haddr();
-
-
-
-
-
- /*
- * Read bootptab database file. Avoid rereading the file if the
- * write date hasn't changed since the last time we read it.
- */
-
- void readtab()
- {
- struct host *hp;
- FILE *fp;
- struct stat st;
- unsigned hashcode, buflen;
- static char buffer[MAXENTRYLEN];
- #ifdef DEBUG
- char timestr[26];
- #endif
-
- /*
- * Check the last modification time.
- */
- if (stat(bootptab, &st) < 0) {
- report(LOG_ERR, "stat on \"%s\": %s\n", bootptab, get_errmsg());
- return;
- }
- #ifdef DEBUG
- if (debug > 3) {
- strcpy(timestr, ctime(&(st.st_mtime)));
- report(LOG_INFO, "bootptab mtime is %s",
- timestr);
- }
- #endif
- if (st.st_mtime == modtime && st.st_nlink) {
- /*
- * hasn't been modified or deleted yet.
- */
- return;
- }
- report(LOG_INFO, "reading %s\"%s\"\n",
- (modtime != 0L) ? "new " : "",
- bootptab);
-
- /*
- * Open bootptab file.
- */
- if ((fp = fopen(bootptab, "r")) == NULL) {
- report(LOG_ERR, "error opening \"%s\": %s\n", bootptab, get_errmsg());
- return;
- }
-
- /*
- * Record file modification time.
- */
- if (fstat(fileno(fp), &st) < 0) {
- report(LOG_ERR, "fstat: %s\n", get_errmsg());
- fclose(fp);
- return;
- }
- modtime = st.st_mtime;
-
- /*
- * Entirely erase all hash tables.
- */
- hash_Reset(hwhashtable, free_host);
- hash_Reset(iphashtable, free_host);
- hash_Reset(nmhashtable, free_host);
-
- nhosts = 0;
- nentries = 0;
- while (TRUE) {
- buflen = sizeof(buffer);
- read_entry(fp, buffer, &buflen);
- if (buflen == 0) { /* More entries? */
- break;
- }
- hp = (struct host *) smalloc(sizeof(struct host));
-
- /*
- * Get individual info
- */
- hp->flags.vm_auto = TRUE;
- bcopy(vm_rfc1048, hp->vm_cookie, 4);
- if (process_entry(hp, buffer) < 0) {
- free_host(hp);
- continue;
- }
-
- if ((hp->flags.htype && hp->flags.haddr) || hp->flags.iaddr) {
- nhosts++;
- }
- if (hp->flags.htype && hp->flags.haddr) {
- hashcode = hash_HashFunction(hp->haddr, haddrlength(hp->htype));
- if (hash_Insert(hwhashtable, hashcode, hwinscmp, hp, hp) < 0) {
- report(LOG_WARNING, "duplicate %s address: %s\n",
- netname(hp->htype),
- haddrtoa(hp->haddr, hp->htype));
- free_host(hp);
- continue;
- }
- }
- if (hp->flags.iaddr) {
- hashcode = hash_HashFunction(&(hp->iaddr.s_addr), 4);
- if (hash_Insert(iphashtable, hashcode, nullcmp, hp, hp) < 0) {
- report(LOG_ERR,
- "hash_Insert() failed on IP address insertion\n");
- }
- }
-
- hashcode = hash_HashFunction(hp->hostname->string,
- strlen(hp->hostname->string));
- if (hash_Insert(nmhashtable, hashcode, nullcmp, hp->hostname->string, hp) < 0) {
- report(LOG_ERR,
- "hash_Insert() failed on insertion of hostname: \"%s\"\n",
- hp->hostname->string);
- }
- nentries++;
- }
-
- done:
- fclose(fp);
- report(LOG_INFO, "read %d entries (%d hosts) from \"%s\"\n",
- nentries, nhosts, bootptab);
- return;
- }
-
-
-
- /*
- * Read an entire host entry from the file pointed to by "fp" and insert it
- * into the memory pointed to by "buffer". Leading whitespace and comments
- * starting with "#" are ignored (removed). Backslashes (\) always quote
- * the next character except that newlines preceeded by a backslash cause
- * line-continuation onto the next line. The entry is terminated by a
- * newline character which is not preceeded by a backslash. Sequences
- * surrounded by double quotes are taken literally (including newlines, but
- * not backslashes).
- *
- * The "bufsiz" parameter points to an unsigned int which specifies the
- * maximum permitted buffer size. Upon return, this value will be replaced
- * with the actual length of the entry (not including the null terminator).
- *
- * This code is a little scary. . . . I don't like using gotos in C
- * either, but I first wrote this as an FSM diagram and gotos seemed like
- * the easiest way to implement it. Maybe later I'll clean it up.
- */
-
- PRIVATE void read_entry(fp, buffer, bufsiz)
- FILE *fp;
- char *buffer;
- unsigned *bufsiz;
- {
- int c, length;
-
- length = 0;
-
- /*
- * Eat whitespace, blank lines, and comment lines.
- */
- top:
- c = fgetc(fp);
- if (c < 0) {
- goto done; /* Exit if end-of-file */
- }
- if (isspace(c)) {
- goto top; /* Skip over whitespace */
- }
- if (c == '#') {
- while (TRUE) { /* Eat comments after # */
- c = fgetc(fp);
- if (c < 0) {
- goto done; /* Exit if end-of-file */
- }
- if (c == '\n') {
- goto top; /* Try to read the next line */
- }
- }
- }
- ungetc(c, fp); /* Other character, push it back to reprocess it */
-
-
- /*
- * Now we're actually reading a data entry. Get each character and
- * assemble it into the data buffer, processing special characters like
- * double quotes (") and backslashes (\).
- */
-
- mainloop:
- c = fgetc(fp);
- switch (c) {
- case EOF:
- case '\n':
- goto done; /* Exit on EOF or newline */
- case '\\':
- c = fgetc(fp); /* Backslash, read a new character */
- if (c < 0) {
- goto done; /* Exit on EOF */
- }
- *buffer++ = c; /* Store the literal character */
- length++;
- if (length < *bufsiz - 1) {
- goto mainloop;
- } else {
- goto done;
- }
- case '"':
- *buffer++ = '"'; /* Store double-quote */
- length++;
- if (length >= *bufsiz - 1) {
- goto done;
- }
- while (TRUE) { /* Special quote processing loop */
- c = fgetc(fp);
- switch (c) {
- case EOF:
- goto done; /* Exit on EOF . . . */
- case '"':
- *buffer++ = '"'; /* Store matching quote */
- length++;
- if (length < *bufsiz - 1) {
- goto mainloop; /* And continue main loop */
- } else {
- goto done;
- }
- case '\\':
- if ((c = fgetc(fp)) < 0) { /* Backslash */
- goto done; /* EOF. . . .*/
- } /* else fall through */
- default:
- *buffer++ = c; /* Other character, store it */
- length++;
- if (length >= *bufsiz - 1) {
- goto done;
- }
- }
- }
- case ':':
- *buffer++ = c; /* Store colons */
- length++;
- if (length >= *bufsiz - 1) {
- goto done;
- }
-
- do { /* But remove whitespace after them */
- c = fgetc(fp);
- if ((c < 0) || (c == '\n')) {
- goto done;
- }
- } while (isspace(c)); /* Skip whitespace */
-
- if (c == '\\') { /* Backslash quotes next character */
- c = fgetc(fp);
- if (c < 0) {
- goto done;
- }
- if (c == '\n') {
- goto top; /* Backslash-newline continuation */
- }
- }
- /* fall through if "other" character */
- default:
- *buffer++ = c; /* Store other characters */
- length++;
- if (length >= *bufsiz - 1) {
- goto done;
- }
- }
- goto mainloop; /* Keep going */
-
- done:
- *buffer = '\0'; /* Terminate string */
- *bufsiz = length; /* Tell the caller its length */
- }
-
-
-
- /*
- * Parse out all the various tags and parameters in the host entry pointed
- * to by "src". Stuff all the data into the appropriate fields of the
- * host structure pointed to by "host". If there is any problem with the
- * entry, an error message is reported via report(), no further processing
- * is done, and -1 is returned. Successful calls return 0.
- *
- * (Some errors probably shouldn't be so completely fatal. . . .)
- */
-
- PRIVATE int process_entry(host, src)
- struct host *host;
- char *src;
- {
- int retval;
-
- if (!host || *src == '\0') {
- return -1;
- }
- host->hostname = get_shared_string(&src);
- if (!goodname(host->hostname->string)) {
- report(LOG_ERR, "bad hostname: \"%s\"\n", host->hostname->string);
- del_string(host->hostname);
- return -1;
- }
- adjust(&src);
- while (TRUE) {
- retval = eval_symbol(&src, host);
- switch (retval) {
- case SUCCESS:
- break;
- case E_SYNTAX_ERROR:
- report(LOG_ERR, "syntax error in entry for host \"%s\"\n",
- host->hostname->string);
- return -1;
- case E_UNKNOWN_SYMBOL:
- report(LOG_ERR, "unknown symbol in entry for host \"%s\"\n",
- host->hostname->string);
- return -1;
- case E_BAD_IPADDR:
- report(LOG_ERR, "bad IP address for host \"%s\"\n",
- host->hostname->string);
- return -1;
- case E_BAD_HADDR:
- report(LOG_ERR, "bad hardware address for host \"%s\"\n",
- host->hostname->string);
- return -1;
- case E_BAD_SMASK:
- report(LOG_ERR, "bad subnet mask for host \"%s\"\n",
- host->hostname->string);
- return -1;
- case E_BAD_TIMEOFF:
- report(LOG_ERR, "bad time offset for host \"%s\"\n",
- host->hostname->string);
- return -1;
- case E_BAD_VM_COOKIE:
- report(LOG_ERR, "bad vendor magic cookie for host \"%s\"\n",
- host->hostname->string);
- return -1;
- case E_BAD_HOMEDIR:
- report(LOG_ERR, "bad home directory for host \"%s\"\n",
- host->hostname->string);
- return -1;
- case E_BAD_TFTPDIR:
- report(LOG_ERR, "bad TFTP directory for host \"%s\"\n",
- host->hostname->string);
- return -1;
- case E_BAD_BOOT_SERVER:
- report(LOG_ERR, "bad boot server IP address for host \"%s\"\n",
- host->hostname->string);
- return -1;
- case E_END_OF_ENTRY:
- default:
- #if 0
- /*
- * For now, don't try to make-up a subnet mask if one
- * wasn't specified.
- *
- * This algorithm is also not entirely correct.
- */
- if (!(hp->flags.subnet_mask)) {
- /*
- * Try to deduce the subnet mask from the network class
- */
- value = (ntohl(value) >> 30) & 0x03;
- switch (value) {
- case 0:
- case 1:
- hp->subnet_mask.s_addr = htonl(0xFF000000L);
- break;
- case 2:
- hp->subnet_mask.s_addr = htonl(0xFFFF0000L);
- break;
- case 3:
- hp->subnet_mask.s_addr = htonl(0xFFFFFF00L);
- break;
- }
- hp->flags.subnet_mask = TRUE;
- }
- #endif
- /*
- * And now we're done with this entry
- */
- return 0;
- }
- adjust(&src);
- }
- }
-
-
-
- /*
- * Evaluate the two-character tag symbol pointed to by "symbol" and place
- * the data in the structure pointed to by "hp". The pointer pointed to
- * by "symbol" is updated to point past the source string (but may not
- * point to the next tag entry).
- *
- * Obviously, this need a few more comments. . . .
- */
-
- PRIVATE eval_symbol(symbol, hp)
- char **symbol;
- struct host *hp;
- {
- char tmpstr[MAXSTRINGLEN];
- byte *tmphaddr, *ustr;
- struct shared_string *ss;
- struct symbolmap *symbolptr;
- u_long value;
- long timeoff;
- int i, numsymbols;
- unsigned len;
- int optype; /* Indicates boolean, addition, or deletion */
-
- if ((*symbol)[0] == '\0') {
- return E_END_OF_ENTRY;
- }
- if ((*symbol)[0] == ':') {
- return SUCCESS;
- }
- if ((*symbol)[0] == 'T') { /* generic symbol */
- (*symbol)++;
- value = get_u_long(symbol);
- eat_whitespace(symbol);
- if ((*symbol)[0] != '=') {
- return E_SYNTAX_ERROR;
- }
- (*symbol)++;
- if (!(hp->generic)) {
- hp->generic = (struct shared_bindata *)
- smalloc(sizeof(struct shared_bindata));
- }
- process_generic(symbol, &(hp->generic), (byte) (value & 0xFF));
- hp->flags.generic = TRUE;
- return SUCCESS;
- }
-
- eat_whitespace(symbol);
-
- /*
- * Determine the type of operation to be done on this symbol
- */
- switch ((*symbol)[2]) {
- case '=':
- optype = OP_ADDITION;
- break;
- case '@':
- optype = OP_DELETION;
- break;
- case ':':
- case '\0':
- optype = OP_BOOLEAN;
- break;
- default:
- return E_SYNTAX_ERROR;
- }
-
- symbolptr = symbol_list;
- numsymbols = sizeof(symbol_list) / sizeof(struct symbolmap);
- for (i = 0; i < numsymbols; i++) {
- if (((symbolptr->symbol)[0] == (*symbol)[0]) &&
- ((symbolptr->symbol)[1] == (*symbol)[1])) {
- break;
- }
- symbolptr++;
- }
- if (i >= numsymbols) {
- return E_UNKNOWN_SYMBOL;
- }
-
- /*
- * Skip past the = or @ character (to point to the data) if this
- * isn't a boolean operation. For boolean operations, just skip
- * over the two-character tag symbol (and nothing else. . . .).
- */
- (*symbol) += (optype == OP_BOOLEAN) ? 2 : 3;
-
- switch (symbolptr->symbolcode) {
- case SYM_BOOTFILE:
- switch (optype) {
- case OP_ADDITION:
- if (ss = get_shared_string(symbol)) {
- if (hp->bootfile) {
- del_string(hp->bootfile);
- }
- hp->bootfile = ss;
- hp->flags.bootfile = TRUE;
- }
- break;
- case OP_DELETION:
- if (hp->bootfile) {
- del_string(hp->bootfile);
- }
- hp->bootfile = NULL;
- hp->flags.bootfile = FALSE;
- break;
- case OP_BOOLEAN:
- return E_SYNTAX_ERROR;
- }
- break;
-
- case SYM_COOKIE_SERVER:
- switch (optype) {
- case OP_ADDITION:
- if (hp->flags.cookie_server && hp->cookie_server) {
- del_iplist(hp->cookie_server);
- }
- hp->cookie_server = get_addresses(symbol);
- hp->flags.cookie_server = TRUE;
- break;
- case OP_DELETION:
- if (hp->flags.cookie_server && hp->cookie_server) {
- del_iplist(hp->cookie_server);
- }
- hp->cookie_server = NULL;
- hp->flags.cookie_server = FALSE;
- break;
- case OP_BOOLEAN:
- return E_SYNTAX_ERROR;
- }
- break;
-
- case SYM_DOMAIN_SERVER:
- switch (optype) {
- case OP_ADDITION:
- if (hp->flags.domain_server && hp->domain_server) {
- del_iplist(hp->domain_server);
- }
- hp->domain_server = get_addresses(symbol);
- hp->flags.domain_server = TRUE;
- break;
- case OP_DELETION:
- if (hp->flags.domain_server && hp->domain_server) {
- del_iplist(hp->domain_server);
- }
- hp->domain_server = NULL;
- hp->flags.domain_server = FALSE;
- break;
- case OP_BOOLEAN:
- return E_SYNTAX_ERROR;
- }
- break;
-
- case SYM_GATEWAY:
- switch (optype) {
- case OP_ADDITION:
- if (hp->flags.gateway && hp->gateway) {
- del_iplist(hp->gateway);
- }
- hp->gateway = get_addresses(symbol);
- hp->flags.gateway = TRUE;
- break;
- case OP_DELETION:
- if (hp->flags.gateway && hp->gateway) {
- del_iplist(hp->gateway);
- }
- hp->gateway = NULL;
- hp->flags.gateway = FALSE;
- break;
- case OP_BOOLEAN:
- return E_SYNTAX_ERROR;
- }
- break;
-
- case SYM_HADDR:
- switch (optype) {
- case OP_ADDITION:
- if (hp->flags.htype && hp->htype &&
- (tmphaddr = prs_haddr(symbol, hp->htype))) {
- bcopy(tmphaddr, hp->haddr, haddrlength(hp->htype));
- hp->flags.haddr = TRUE;
- } else {
- return E_BAD_HADDR;
- }
- break;
- case OP_DELETION:
- hp->flags.haddr = FALSE;
- break;
- case OP_BOOLEAN:
- return E_SYNTAX_ERROR;
- }
- break;
-
- case SYM_HOMEDIR:
- switch (optype) {
- case OP_ADDITION:
- if (ss = get_shared_string(symbol)) {
- if ((ss->string)[0] == '/') {
- if (hp->homedir) {
- del_string(hp->homedir);
- }
- hp->homedir = ss;
- hp->flags.homedir = TRUE;
- } else {
- return E_BAD_HOMEDIR;
- }
- } else {
- return E_BAD_HOMEDIR;
- }
- break;
- case OP_DELETION:
- if (hp->homedir) {
- del_string(hp->homedir);
- }
- hp->homedir = NULL;
- hp->flags.homedir = FALSE;
- break;
- case OP_BOOLEAN:
- return E_SYNTAX_ERROR;
- }
- break;
-
- case SYM_HTYPE:
- switch (optype) {
- case OP_ADDITION:
- value = 0L; /* Assume an illegal value */
- eat_whitespace(symbol);
- if (isdigit(**symbol)) {
- value = get_u_long(symbol);
- } else {
- len = sizeof(tmpstr);
- (void) get_string(symbol, tmpstr, &len);
- makelower(tmpstr);
- numsymbols = sizeof(htnamemap) /
- sizeof(struct htypename);
- for (i = 0; i < numsymbols; i++) {
- if (!strcmp(htnamemap[i].name, tmpstr)) {
- break;
- }
- }
- if (i < numsymbols) {
- value = htnamemap[i].htype;
- }
- }
- if ((value < 0) || (value >= hwinfocnt)) {
- return E_BAD_HTYPE;
- }
- hp->htype = (byte) (value & 0xFF);
- hp->flags.htype = TRUE;
- break;
- case OP_DELETION:
- hp->flags.htype = FALSE;
- break;
- case OP_BOOLEAN:
- return E_SYNTAX_ERROR;
- }
- break;
-
- case SYM_IMPRESS_SERVER:
- switch (optype) {
- case OP_ADDITION:
- if (hp->flags.impress_server && hp->impress_server) {
- del_iplist(hp->impress_server);
- }
- hp->impress_server = get_addresses(symbol);
- hp->flags.impress_server = TRUE;
- break;
- case OP_DELETION:
- if (hp->flags.impress_server && hp->impress_server) {
- del_iplist(hp->impress_server);
- }
- hp->impress_server = NULL;
- hp->flags.impress_server = FALSE;
- break;
- case OP_BOOLEAN:
- return E_SYNTAX_ERROR;
- }
- break;
-
- case SYM_IPADDR:
- switch (optype) {
- case OP_ADDITION:
- if (prs_inetaddr(symbol, &value) < 0) {
- return E_BAD_IPADDR;
- } else {
- hp->iaddr.s_addr = value;
- hp->flags.iaddr = TRUE;
- }
- break;
- case OP_DELETION:
- hp->flags.iaddr = FALSE;
- break;
- case OP_BOOLEAN:
- return E_SYNTAX_ERROR;
- }
- break;
-
- case SYM_LOG_SERVER:
- switch (optype) {
- case OP_ADDITION:
- if (hp->flags.log_server && hp->log_server) {
- del_iplist(hp->log_server);
- }
- hp->log_server = get_addresses(symbol);
- hp->flags.log_server = TRUE;
- break;
- case OP_DELETION:
- if (hp->flags.log_server && hp->log_server) {
- del_iplist(hp->log_server);
- }
- hp->log_server = NULL;
- hp->flags.log_server = FALSE;
- break;
- case OP_BOOLEAN:
- return E_SYNTAX_ERROR;
- }
- break;
-
- case SYM_LPR_SERVER:
- switch (optype) {
- case OP_ADDITION:
- if (hp->flags.lpr_server && hp->lpr_server) {
- del_iplist(hp->lpr_server);
- }
- hp->lpr_server = get_addresses(symbol);
- hp->flags.lpr_server = TRUE;
- break;
- case OP_DELETION:
- if (hp->flags.lpr_server && hp->lpr_server) {
- del_iplist(hp->lpr_server);
- }
- hp->lpr_server = NULL;
- hp->flags.lpr_server = FALSE;
- break;
- case OP_BOOLEAN:
- return E_SYNTAX_ERROR;
- }
- break;
-
- case SYM_NAME_SERVER:
- switch (optype) {
- case OP_ADDITION:
- if (hp->flags.name_server && hp->name_server) {
- del_iplist(hp->name_server);
- }
- hp->name_server = get_addresses(symbol);
- hp->flags.name_server = TRUE;
- break;
- case OP_DELETION:
- if (hp->flags.name_server && hp->name_server) {
- del_iplist(hp->name_server);
- }
- hp->name_server = NULL;
- hp->flags.name_server = FALSE;
- break;
- case OP_BOOLEAN:
- return E_SYNTAX_ERROR;
- }
- break;
-
- case SYM_RLP_SERVER:
- switch (optype) {
- case OP_ADDITION:
- if (hp->flags.rlp_server && hp->rlp_server) {
- del_iplist(hp->rlp_server);
- }
- hp->rlp_server = get_addresses(symbol);
- hp->flags.rlp_server = TRUE;
- break;
- case OP_DELETION:
- if (hp->flags.rlp_server && hp->rlp_server) {
- del_iplist(hp->rlp_server);
- }
- hp->rlp_server = NULL;
- hp->flags.rlp_server = FALSE;
- break;
- case OP_BOOLEAN:
- return E_SYNTAX_ERROR;
- }
- break;
-
- case SYM_SUBNET_MASK:
- switch (optype) {
- case OP_ADDITION:
- if (prs_inetaddr(symbol, &value) < 0) {
- return E_BAD_SMASK;
- } else {
- hp->subnet_mask.s_addr = value;
- hp->flags.subnet_mask = TRUE;
- }
- break;
- case OP_DELETION:
- hp->flags.subnet_mask = FALSE;
- break;
- case OP_BOOLEAN:
- return E_SYNTAX_ERROR;
- }
- break;
-
- case SYM_TIME_OFFSET:
- switch (optype) {
- case OP_ADDITION:
- len = sizeof(tmpstr);
- (void) get_string(symbol, tmpstr, &len);
- if (!strncmp(tmpstr, "auto", 4)) {
- hp->flags.timeoff_auto = TRUE;
- hp->flags.time_offset = TRUE;
- } else {
- if (sscanf(tmpstr, "%ld", &timeoff) != 1) {
- return E_BAD_TIMEOFF;
- } else {
- hp->time_offset = timeoff;
- hp->flags.timeoff_auto = FALSE;
- hp->flags.time_offset = TRUE;
- }
- }
- break;
- case OP_DELETION:
- hp->flags.time_offset = FALSE;
- break;
- case OP_BOOLEAN:
- return E_SYNTAX_ERROR;
- }
- break;
-
- case SYM_TIME_SERVER:
- switch (optype) {
- case OP_ADDITION:
- if (hp->flags.time_server && hp->time_server) {
- del_iplist(hp->time_server);
- }
- hp->time_server = get_addresses(symbol);
- hp->flags.time_server = TRUE;
- break;
- case OP_DELETION:
- if (hp->flags.time_server && hp->time_server) {
- del_iplist(hp->time_server);
- }
- hp->time_server = NULL;
- hp->flags.time_server = FALSE;
- break;
- case OP_BOOLEAN:
- return E_SYNTAX_ERROR;
- }
- break;
-
- case SYM_VENDOR_MAGIC:
- switch (optype) {
- case OP_ADDITION:
- if (!strncmp(*symbol, "auto", 4)) {
- hp->flags.vm_auto = TRUE; /* Make it auto */
- } else if (!strncmp(*symbol, "rfc1048", 7) ||
- !strncmp(*symbol, "rfc1084", 7)) {
- hp->flags.vm_auto = FALSE; /* Make it manual */
- bcopy(vm_rfc1048, hp->vm_cookie, 4);
- } else if (!strncmp(*symbol, "cmu", 3)) {
- hp->flags.vm_auto = FALSE; /* Make it manual */
- bcopy(vm_cmu, hp->vm_cookie, 4);
- } else {
- if (prs_inetaddr(symbol, &value) < 0) {
- return E_BAD_VM_COOKIE;
- }
- hp->flags.vm_auto = FALSE; /* Make it manual */
- ustr = hp->vm_cookie;
- bcopy((char*)&value, ustr, sizeof(long));
- }
- hp->flags.vendor_magic = TRUE;
- break;
- case OP_DELETION:
- hp->flags.vendor_magic = FALSE;
- break;
- case OP_BOOLEAN:
- hp->flags.vm_auto = TRUE;
- hp->flags.vendor_magic = TRUE;
- break;
- }
- break;
-
- case SYM_SIMILAR_ENTRY:
- switch (optype) {
- case OP_ADDITION:
- fill_defaults(hp, symbol);
- break;
- default:
- return E_SYNTAX_ERROR;
- }
- break;
-
- case SYM_NAME_SWITCH:
- switch (optype) {
- case OP_ADDITION:
- return E_SYNTAX_ERROR;
- case OP_DELETION:
- hp->flags.send_name = FALSE;
- hp->flags.name_switch = FALSE;
- break;
- case OP_BOOLEAN:
- hp->flags.send_name = TRUE;
- hp->flags.name_switch = TRUE;
- break;
- }
- break;
-
- case SYM_BOOTSIZE:
- switch (optype) {
- case OP_ADDITION:
- if (!strncmp(*symbol, "auto", 4)) {
- hp->flags.bootsize = TRUE;
- hp->flags.bootsize_auto = TRUE;
- } else {
- hp->bootsize = (unsigned int) get_u_long(symbol);
- hp->flags.bootsize = TRUE;
- hp->flags.bootsize_auto = FALSE;
- }
- break;
- case OP_DELETION:
- hp->flags.bootsize = FALSE;
- break;
- case OP_BOOLEAN:
- hp->flags.bootsize = TRUE;
- hp->flags.bootsize_auto = TRUE;
- break;
- }
- break;
-
- case SYM_BOOT_SERVER:
- switch (optype) {
- case OP_ADDITION:
- if (prs_inetaddr(symbol, &value) < 0) {
- return E_BAD_BOOT_SERVER;
- } else {
- hp->bootserver.s_addr = value;
- hp->flags.bootserver = TRUE;
- }
- break;
- case OP_DELETION:
- hp->flags.bootserver = FALSE;
- break;
- case OP_BOOLEAN:
- return E_SYNTAX_ERROR;
- }
- break;
-
- case SYM_TFTPDIR:
- switch (optype) {
- case OP_ADDITION:
- if (ss = get_shared_string(symbol)) {
- if ((ss->string)[0] == '/') {
- if (hp->tftpdir) {
- del_string(hp->tftpdir);
- }
- hp->tftpdir = ss;
- hp->flags.tftpdir = TRUE;
- } else {
- return E_BAD_TFTPDIR;
- }
- } else {
- return E_BAD_TFTPDIR;
- }
- break;
- case OP_DELETION:
- if (hp->tftpdir) {
- del_string(hp->tftpdir);
- }
- hp->tftpdir = NULL;
- hp->flags.tftpdir = FALSE;
- break;
- case OP_BOOLEAN:
- return E_SYNTAX_ERROR;
- }
- break;
-
- default:
- return E_UNKNOWN_SYMBOL;
- }
- return SUCCESS;
- }
-
-
-
- /*
- * Read a string from the buffer indirectly pointed to through "src" and
- * move it into the buffer pointed to by "dest". A pointer to the maximum
- * allowable length of the string (including null-terminator) is passed as
- * "length". The actual length of the string which was read is returned in
- * the unsigned integer pointed to by "length". This value is the same as
- * that which would be returned by applying the strlen() function on the
- * destination string (i.e the terminating null is not counted as a
- * character). Trailing whitespace is removed from the string. For
- * convenience, the function returns the new value of "dest".
- *
- * The string is read until the maximum number of characters, an unquoted
- * colon (:), or a null character is read. The return string in "dest" is
- * null-terminated.
- */
-
- PRIVATE char *get_string(src, dest, length)
- char **src, *dest;
- unsigned *length;
- {
- int n, len, quoteflag;
-
- quoteflag = FALSE;
- n = 0;
- len = *length - 1;
- while ((n < len) && (**src)) {
- if (!quoteflag && (**src == ':')) {
- break;
- }
- if (**src == '"') {
- (*src)++;
- quoteflag = !quoteflag;
- continue;
- }
- if (**src == '\\') {
- (*src)++;
- if (! **src) {
- break;
- }
- }
- *dest++ = *(*src)++;
- n++;
- }
-
- /*
- * Remove that troublesome trailing whitespace. . .
- */
- while ((n > 0) && isspace(dest[-1])) {
- dest--;
- n--;
- }
-
- *dest = '\0';
- *length = n;
- return dest;
- }
-
-
-
- /*
- * Read the string indirectly pointed to by "src", update the caller's
- * pointer, and return a pointer to a malloc'ed shared_string structure
- * containing the string.
- *
- * The string is read using the same rules as get_string() above.
- */
-
- PRIVATE struct shared_string *get_shared_string(src)
- char **src;
- {
- char retstring[MAXSTRINGLEN];
- struct shared_string *s;
- unsigned length;
-
- length = sizeof(retstring);
- (void) get_string(src, retstring, &length);
-
- s = (struct shared_string *) smalloc(sizeof(struct shared_string)
- + length);
- s->linkcount = 1;
- strcpy(s->string, retstring);
-
- return s;
- }
-
-
-
- /*
- * Load RFC1048 generic information directly into a memory buffer.
- *
- * "src" indirectly points to the ASCII representation of the generic data.
- * "dest" points to a string structure which is updated to point to a new
- * string with the new data appended to the old string. The old string is
- * freed.
- *
- * The given tag value is inserted with the new data.
- *
- * The data may be represented as either a stream of hexadecimal numbers
- * representing bytes (any or all bytes may optionally start with '0x' and
- * be separated with periods ".") or as a quoted string of ASCII
- * characters (the quotes are required).
- */
-
- PRIVATE void process_generic(src, dest, tagvalue)
- char **src;
- struct shared_bindata **dest;
- byte tagvalue;
- {
- byte tmpbuf[MAXBUFLEN];
- byte *str;
- struct shared_bindata *bdata;
- int newlength, oldlength;
-
- str = tmpbuf;
- *str++ = tagvalue; /* Store tag value */
- str++; /* Skip over length field */
- if ((*src)[0] == '"') { /* ASCII data */
- newlength = sizeof(tmpbuf) - 2; /* Set maximum allowed length */
- (void) get_string(src, str, &newlength);
- } else { /* Numeric data */
- newlength = 0;
- while (newlength < sizeof(tmpbuf) - 2) {
- if (interp_byte(src, str++) < 0) {
- break;
- } else {
- newlength++;
- }
- if (**src == '.') {
- (*src)++;
- }
- }
- }
- tmpbuf[1] = (byte) (newlength & 0xFF);
- oldlength = ((*dest)->length);
- bdata = (struct shared_bindata *) smalloc(sizeof(struct shared_bindata)
- + oldlength + newlength + 1);
- if (oldlength > 0) {
- bcopy((*dest)->data, bdata->data, oldlength);
- }
- bcopy(tmpbuf, bdata->data + oldlength, newlength + 2);
- bdata->length = oldlength + newlength + 2;
- bdata->linkcount = 1;
- if (*dest) {
- del_bindata(*dest);
- }
- *dest = bdata;
- }
-
-
-
- /*
- * Verify that the given string makes sense as a hostname (according to
- * Appendix 1, page 29 of RFC882).
- *
- * Return TRUE for good names, FALSE otherwise.
- */
-
- PRIVATE boolean goodname(hostname)
- register char *hostname;
- {
- do {
- if (!isalpha(*hostname++)) { /* First character must be a letter */
- return FALSE;
- }
- while (isalnum(*hostname) || (*hostname == '-')) {
- hostname++; /* Alphanumeric or a hyphen */
- }
- if (!isalnum(hostname[-1])) { /* Last must be alphanumeric */
- return FALSE;
- }
- if (*hostname == '\0') { /* Done? */
- return TRUE;
- }
- } while (*hostname++ == '.'); /* Dot, loop for next label */
-
- return FALSE; /* If it's not a dot, lose */
- }
-
-
-
- /*
- * Null compare function -- always returns FALSE so an element is always
- * inserted into a hash table (i.e. there is never a collision with an
- * existing element).
- */
-
- PRIVATE boolean nullcmp(host1, host2)
- struct host *host1, *host2;
- {
- return FALSE;
- }
-
-
- /*
- * Function for comparing a string with the hostname field of a host
- * structure.
- */
-
- PRIVATE boolean nmcmp(name, hp)
- char *name;
- struct host *hp;
- {
- return !strcmp(name, hp->hostname->string);
- }
-
-
- /*
- * Compare function to determine whether two hardware addresses are
- * equivalent. Returns TRUE if "host1" and "host2" are equivalent, FALSE
- * otherwise.
- *
- * If the hardware addresses of "host1" and "host2" are identical, but
- * they are on different IP subnets, this function returns FALSE.
- *
- * This function is used when inserting elements into the hardware address
- * hash table.
- */
-
- PRIVATE boolean hwinscmp(host1, host2)
- struct host *host1, *host2;
- {
- if (host1->htype != host2->htype) {
- return FALSE;
- }
- if (bcmp(host1->haddr, host2->haddr, haddrlength(host1->htype))) {
- return FALSE;
- }
- if ((host1->subnet_mask.s_addr) == (host2->subnet_mask.s_addr)) {
- if (((host1->iaddr.s_addr) & (host1->subnet_mask.s_addr)) !=
- ((host2->iaddr.s_addr) & (host2->subnet_mask.s_addr))) {
- return FALSE;
- }
- }
- return TRUE;
- }
-
-
-
- /*
- * Process the "similar entry" symbol.
- *
- * The host specified as the value of the "tc" symbol is used as a template
- * for the current host entry. Symbol values not explicitly set in the
- * current host entry are inferred from the template entry.
- */
-
- PRIVATE void fill_defaults(hp, src)
- struct host *hp;
- char **src;
- {
- unsigned tlen, hashcode;
- struct host *hp2, thp;
- char tstring[MAXSTRINGLEN];
-
- tlen = sizeof(tstring);
- (void) get_string(src, tstring, &tlen);
- if (goodname(tstring)) {
- hashcode = hash_HashFunction(tstring, tlen);
- hp2 = (struct host *) hash_Lookup(nmhashtable, hashcode, nmcmp,
- tstring);
- } else {
- thp.iaddr.s_addr = inet_addr(tstring);
- hashcode = hash_HashFunction(&(thp.iaddr.s_addr), 4);
- hp2 = (struct host *) hash_Lookup(iphashtable, hashcode, iplookcmp,
- &thp);
- }
- if (hp2 == NULL) {
- report(LOG_ERR, "can't find tc=\"%s\"\n", tstring);
- } else {
- /*
- * Assignments inside "if" conditionals are intended here.
- */
- if (!hp->flags.cookie_server) {
- if (hp->flags.cookie_server = hp2->flags.cookie_server) {
- hp->cookie_server = hp2->cookie_server;
- (hp->cookie_server->linkcount)++;
- }
- }
- if (!hp->flags.domain_server) {
- if (hp->flags.domain_server = hp2->flags.domain_server) {
- hp->domain_server = hp2->domain_server;
- (hp->domain_server->linkcount)++;
- }
- }
- if (!hp->flags.gateway) {
- if (hp->flags.gateway = hp2->flags.gateway) {
- hp->gateway = hp2->gateway;
- (hp->gateway->linkcount)++;
- }
- }
- if (!hp->flags.impress_server) {
- if (hp->flags.impress_server = hp2->flags.impress_server) {
- hp->impress_server = hp2->impress_server;
- (hp->impress_server->linkcount)++;
- }
- }
- if (!hp->flags.log_server) {
- if (hp->flags.log_server = hp2->flags.log_server) {
- hp->log_server = hp2->log_server;
- (hp->log_server->linkcount)++;
- }
- }
- if (!hp->flags.lpr_server) {
- if (hp->flags.lpr_server = hp2->flags.lpr_server) {
- hp->lpr_server = hp2->lpr_server;
- (hp->lpr_server->linkcount)++;
- }
- }
- if (!hp->flags.name_server) {
- if (hp->flags.name_server = hp2->flags.name_server) {
- hp->name_server = hp2->name_server;
- (hp->name_server->linkcount)++;
- }
- }
- if (!hp->flags.rlp_server) {
- if (hp->flags.rlp_server = hp2->flags.rlp_server) {
- hp->rlp_server = hp2->rlp_server;
- (hp->rlp_server->linkcount)++;
- }
- }
- if (!hp->flags.time_server) {
- if (hp->flags.time_server = hp2->flags.time_server) {
- hp->time_server = hp2->time_server;
- (hp->time_server->linkcount)++;
- }
- }
- if (!hp->flags.homedir) {
- if (hp->flags.homedir = hp2->flags.homedir) {
- hp->homedir = hp2->homedir;
- (hp->homedir->linkcount)++;
- }
- }
- if (!hp->flags.bootfile) {
- if (hp->flags.bootfile = hp2->flags.bootfile) {
- hp->bootfile = hp2->bootfile;
- (hp->bootfile->linkcount)++;
- }
- }
- if (!hp->flags.generic) {
- if (hp->flags.generic = hp2->flags.generic) {
- hp->generic = hp2->generic;
- (hp->generic->linkcount)++;
- }
- }
- if (!hp->flags.vendor_magic) {
- hp->flags.vm_auto = hp2->flags.vm_auto;
- if (hp->flags.vendor_magic = hp2->flags.vendor_magic) {
- bcopy(hp2->vm_cookie, hp->vm_cookie, 4);
- }
- }
- if (!hp->flags.name_switch) {
- if (hp->flags.name_switch = hp2->flags.name_switch) {
- hp->flags.send_name = hp2->flags.send_name;
- }
- }
- if (!hp->flags.htype) {
- if (hp->flags.htype = hp2->flags.htype) {
- hp->htype = hp2->htype;
- }
- }
- if (!hp->flags.time_offset) {
- if (hp->flags.time_offset = hp2->flags.time_offset) {
- hp->flags.timeoff_auto = hp2->flags.timeoff_auto;
- hp->time_offset = hp2->time_offset;
- }
- }
- if (!hp->flags.subnet_mask) {
- if (hp->flags.subnet_mask = hp2->flags.subnet_mask) {
- hp->subnet_mask.s_addr = hp2->subnet_mask.s_addr;
- }
- }
- if (!hp->flags.bootsize) {
- if (hp->flags.bootsize = hp2->flags.bootsize) {
- hp->flags.bootsize_auto = hp2->flags.bootsize_auto;
- hp->bootsize = hp2->bootsize;
- }
- }
- if (!hp->flags.tftpdir) {
- if (hp->flags.tftpdir = hp2->flags.tftpdir) {
- hp->tftpdir = hp2->tftpdir;
- (hp->tftpdir->linkcount)++;
- }
- }
- }
- }
-
-
-
- /*
- * This function adjusts the caller's pointer to point just past the
- * first-encountered colon. If it runs into a null character, it leaves
- * the pointer pointing to it.
- */
-
- PRIVATE void adjust(s)
- char **s;
- {
- register char *t;
-
- t = *s;
- while (*t && (*t != ':')) {
- t++;
- }
- if (*t) {
- t++;
- }
- *s = t;
- }
-
-
-
-
- /*
- * This function adjusts the caller's pointer to point to the first
- * non-whitespace character. If it runs into a null character, it leaves
- * the pointer pointing to it.
- */
-
- PRIVATE void eat_whitespace(s)
- char **s;
- {
- register char *t;
-
- t = *s;
- while (*t && isspace(*t)) {
- t++;
- }
- *s = t;
- }
-
-
-
- /*
- * This function converts the given string to all lowercase.
- */
-
- PRIVATE void makelower(s)
- char *s;
- {
- while (*s) {
- if (isupper(*s)) {
- *s = tolower(*s);
- }
- s++;
- }
- }
-
-
-
- /*
- *
- * N O T E :
- *
- * In many of the functions which follow, a parameter such as "src" or
- * "symbol" is passed as a pointer to a pointer to something. This is
- * done for the purpose of letting the called function update the
- * caller's copy of the parameter (i.e. to effect call-by-reference
- * parameter passing). The value of the actual parameter is only used
- * to locate the real parameter of interest and then update this indirect
- * parameter.
- *
- * I'm sure somebody out there won't like this. . . .
- *
- *
- */
-
-
-
- /*
- * "src" points to a character pointer which points to an ASCII string of
- * whitespace-separated IP addresses. A pointer to an in_addr_list
- * structure containing the list of addresses is returned. NULL is
- * returned if no addresses were found at all. The pointer pointed to by
- * "src" is updated to point to the first non-address (illegal) character.
- */
-
- PRIVATE struct in_addr_list *get_addresses(src)
- char **src;
- {
- struct in_addr tmpaddrlist[MAXINADDRS];
- struct in_addr *address1, *address2;
- struct in_addr_list *result;
- unsigned addrcount, totalsize;
-
- address1 = tmpaddrlist;
- for (addrcount = 0; addrcount < MAXINADDRS; addrcount++) {
- while (**src && isspace(**src)) { /* Skip whitespace */
- (*src)++;
- }
- if (! **src) { /* Quit if nothing more */
- break;
- }
- if (prs_inetaddr(src, &(address1->s_addr)) < 0) {
- break;
- }
- address1++; /* Point to next address slot */
- }
- if (addrcount < 1) {
- result = NULL;
- } else {
- totalsize = sizeof(struct in_addr_list)
- + (addrcount - 1) * sizeof(struct in_addr);
- result = (struct in_addr_list *) smalloc(totalsize);
- result->linkcount = 1;
- result->addrcount = addrcount;
- address1 = tmpaddrlist;
- address2 = result->addr;
- for (; addrcount > 0; addrcount--) {
- address2->s_addr = address1->s_addr;
- address1++;
- address2++;
- }
- }
- return result;
- }
-
-
-
- /*
- * prs_inetaddr(src, result)
- *
- * "src" is a value-result parameter; the pointer it points to is updated
- * to point to the next data position. "result" points to an unsigned long
- * in which an address is returned.
- *
- * This function parses the IP address string in ASCII "dot notation" pointed
- * to by (*src) and places the result (in network byte order) in the unsigned
- * long pointed to by "result". For malformed addresses, -1 is returned,
- * (*src) points to the first illegal character, and the unsigned long pointed
- * to by "result" is unchanged. Successful calls return 0.
- */
-
- PRIVATE prs_inetaddr(src, result)
- char **src;
- u_long *result;
- {
- register u_long value;
- u_long parts[4], *pp = parts;
- int n;
-
- if (!isdigit(**src)) {
- return -1;
- }
- loop:
- value = get_u_long(src);
- if (**src == '.') {
- /*
- * Internet format:
- * a.b.c.d
- * a.b.c (with c treated as 16-bits)
- * a.b (with b treated as 24 bits)
- */
- if (pp >= parts + 4) {
- return (-1);
- }
- *pp++ = value;
- (*src)++;
- goto loop;
- }
- /*
- * Check for trailing characters.
- */
- if (**src && !(isspace(**src) || (**src == ':'))) {
- return (-1);
- }
- *pp++ = value;
- /*
- * Construct the address according to
- * the number of parts specified.
- */
- n = pp - parts;
- switch (n) {
- case 1: /* a -- 32 bits */
- value = parts[0];
- break;
- case 2: /* a.b -- 8.24 bits */
- value = (parts[0] << 24) | (parts[1] & 0xFFFFFF);
- break;
- case 3: /* a.b.c -- 8.8.16 bits */
- value = (parts[0] << 24) | ((parts[1] & 0xFF) << 16) |
- (parts[2] & 0xFFFF);
- break;
- case 4: /* a.b.c.d -- 8.8.8.8 bits */
- value = (parts[0] << 24) | ((parts[1] & 0xFF) << 16) |
- ((parts[2] & 0xFF) << 8) | (parts[3] & 0xFF);
- break;
- default:
- return (-1);
- }
- *result = htonl(value);
- return (0);
- }
-
-
-
- /*
- * "src" points to a pointer which in turn points to a hexadecimal ASCII
- * string. This string is interpreted as a hardware address and returned
- * as a pointer to the actual hardware address, represented as an array of
- * bytes.
- *
- * The ASCII string must have the proper number of digits for the specified
- * hardware type (e.g. twelve digits for a 48-bit Ethernet address).
- * Two-digit sequences (bytes) may be separated with periods (.) and/or
- * prefixed with '0x' for readability, but this is not required.
- *
- * For bad addresses, the pointer which "src" points to is updated to point
- * to the start of the first two-digit sequence which was bad, and the
- * function returns a NULL pointer.
- */
-
- PRIVATE byte *prs_haddr(src, htype)
- char **src;
- byte htype;
- {
- static byte haddr[MAXHADDRLEN];
- byte *hptr;
- unsigned hlen;
-
- hlen = haddrlength(htype); /* Get length of this address type */
- hptr = haddr;
- while (hptr < haddr + hlen) {
- if (**src == '.') {
- (*src)++;
- }
- if (interp_byte(src, hptr++) < 0) {
- return NULL;
- }
- }
- return haddr;
- }
-
-
-
- /*
- * "src" is a pointer to a character pointer which in turn points to a
- * hexadecimal ASCII representation of a byte. This byte is read, the
- * character pointer is updated, and the result is deposited into the
- * byte pointed to by "retbyte".
- *
- * The usual '0x' notation is allowed but not required. The number must be
- * a two digit hexadecimal number. If the number is invalid, "src" and
- * "retbyte" are left untouched and -1 is returned as the function value.
- * Successful calls return 0.
- */
-
- PRIVATE int interp_byte(src, retbyte)
- char **src;
- byte *retbyte;
- {
- int v;
-
- if ((*src)[0] == '0' && (*src)[1] == 'x' || (*src)[1] == 'X') {
- (*src) += 2; /* allow 0x for hex, but don't require it */
- }
- if (!isxdigit((*src)[0]) || !isxdigit((*src)[1])) {
- return -1;
- }
- if (sscanf(*src, "%2x", &v) != 1) {
- return -1;
- }
- (*src) += 2;
- *retbyte = (byte) (v & 0xFF);
- return 0;
- }
-
-
-
- /*
- * The parameter "src" points to a character pointer which points to an
- * ASCII string representation of an unsigned number. The number is
- * returned as an unsigned long and the character pointer is updated to
- * point to the first illegal character.
- */
-
- PRIVATE u_long get_u_long(src)
- char **src;
- {
- register u_long value, base;
- char c;
-
- /*
- * Collect number up to first illegal character. Values are specified
- * as for C: 0x=hex, 0=octal, other=decimal.
- */
- value = 0;
- base = 10;
- if (**src == '0') {
- base = 8, (*src)++;
- }
- if (**src == 'x' || **src == 'X') {
- base = 16, (*src)++;
- }
- while (c = **src) {
- if (isdigit(c)) {
- value = (value * base) + (c - '0');
- (*src)++;
- continue;
- }
- if (base == 16 && isxdigit(c)) {
- value = (value << 4) + ((c & ~32) + 10 - 'A');
- (*src)++;
- continue;
- }
- break;
- }
- return value;
- }
-
-
-
- /*
- * Routines for deletion of data associated with the main data structure.
- */
-
-
- /*
- * Frees the entire host data structure given. Does nothing if the passed
- * pointer is NULL.
- */
-
- PRIVATE void free_host(hostptr)
- struct host *hostptr;
- {
- if (hostptr) {
- del_iplist(hostptr->cookie_server);
- del_iplist(hostptr->domain_server);
- del_iplist(hostptr->gateway);
- del_iplist(hostptr->impress_server);
- del_iplist(hostptr->log_server);
- del_iplist(hostptr->lpr_server);
- del_iplist(hostptr->name_server);
- del_iplist(hostptr->rlp_server);
- del_iplist(hostptr->time_server);
- del_string(hostptr->hostname);
- del_string(hostptr->homedir);
- del_string(hostptr->bootfile);
- del_string(hostptr->tftpdir);
- del_bindata(hostptr->generic);
- free((char *) hostptr);
- }
- }
-
-
-
- /*
- * Decrements the linkcount on the given IP address data structure. If the
- * linkcount goes to zero, the memory associated with the data is freed.
- */
-
- PRIVATE void del_iplist(iplist)
- struct in_addr_list *iplist;
- {
- if (iplist) {
- if (! (--(iplist->linkcount))) {
- free((char *) iplist);
- }
- }
- }
-
-
-
- /*
- * Decrements the linkcount on a string data structure. If the count
- * goes to zero, the memory associated with the string is freed. Does
- * nothing if the passed pointer is NULL.
- */
-
- PRIVATE void del_string(stringptr)
- struct shared_string *stringptr;
- {
- if (stringptr) {
- if (! (--(stringptr->linkcount))) {
- free((char *) stringptr);
- }
- }
- }
-
-
-
- /*
- * Decrements the linkcount on a shared_bindata data structure. If the
- * count goes to zero, the memory associated with the data is freed. Does
- * nothing if the passed pointer is NULL.
- */
-
- PRIVATE void del_bindata(dataptr)
- struct shared_bindata *dataptr;
- {
- if (dataptr) {
- if (! (--(dataptr->linkcount))) {
- free((char *) dataptr);
- }
- }
- }
-
-
-
-
- /* smalloc() -- safe malloc()
- *
- * Always returns a valid pointer (if it returns at all). The allocated
- * memory is initialized to all zeros. If malloc() returns an error, a
- * message is printed using the report() function and the program aborts
- * with a status of 1.
- */
-
- PRIVATE char *smalloc(nbytes)
- unsigned nbytes;
- {
- char *retvalue;
-
- retvalue = malloc(nbytes);
- if (!retvalue) {
- report(LOG_ERR, "malloc() failure -- exiting\n");
- exit(1);
- }
- bzero(retvalue, nbytes);
- return retvalue;
- }
-