/libexec/rbootd/parseconf.c
C | 360 lines | 165 code | 36 blank | 159 comment | 68 complexity | 4ee0f211e0b311aee793d74c6a32f3b4 MD5 | raw file
- /*-
- * SPDX-License-Identifier: BSD-3-Clause
- *
- * Copyright (c) 1988, 1992 The University of Utah and the Center
- * for Software Science (CSS).
- * Copyright (c) 1992, 1993
- * The Regents of the University of California. All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * the Center for Software Science of the University of Utah Computer
- * Science Department. CSS requests users of this software to return
- * to css-dist@cs.utah.edu any improvements that they make and grant
- * CSS redistribution rights.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * from: @(#)parseconf.c 8.1 (Berkeley) 6/4/93
- *
- * From: Utah Hdr: parseconf.c 3.1 92/07/06
- * Author: Jeff Forys, University of Utah CSS
- */
- #ifndef lint
- #if 0
- static const char sccsid[] = "@(#)parseconf.c 8.1 (Berkeley) 6/4/93";
- #endif
- static const char rcsid[] =
- "$FreeBSD$";
- #endif /* not lint */
- #include <sys/param.h>
- #include <sys/stat.h>
- #include <sys/time.h>
- #include <ctype.h>
- #include <dirent.h>
- #include <fcntl.h>
- #include <signal.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <syslog.h>
- #include "defs.h"
- /*
- ** ParseConfig -- parse the config file into linked list of clients.
- **
- ** Parameters:
- ** None.
- **
- ** Returns:
- ** 1 on success, 0 otherwise.
- **
- ** Side Effects:
- ** - Linked list of clients will be (re)allocated.
- **
- ** Warnings:
- ** - GetBootFiles() must be called before this routine
- ** to create a linked list of default boot files.
- */
- int
- ParseConfig(void)
- {
- FILE *fp;
- CLIENT *client;
- u_int8_t *addr;
- char line[C_LINELEN];
- char *cp, *bcp;
- int i, j;
- int omask, linecnt = 0;
- if (BootAny) /* ignore config file */
- return(1);
- FreeClients(); /* delete old list of clients */
- if ((fp = fopen(ConfigFile, "r")) == NULL) {
- syslog(LOG_ERR, "ParseConfig: can't open config file (%s)",
- ConfigFile);
- return(0);
- }
- /*
- * We've got to block SIGHUP to prevent reconfiguration while
- * dealing with the linked list of Clients. This can be done
- * when actually linking the new client into the list, but
- * this could have unexpected results if the server was HUP'd
- * whilst reconfiguring. Hence, it is done here.
- */
- omask = sigblock(sigmask(SIGHUP));
- /*
- * GETSTR positions `bcp' at the start of the current token,
- * and null terminates it. `cp' is positioned at the start
- * of the next token. spaces & commas are separators.
- */
- #define GETSTR while (isspace(*cp) || *cp == ',') cp++; \
- bcp = cp; \
- while (*cp && *cp!=',' && !isspace(*cp)) cp++; \
- if (*cp) *cp++ = '\0'
- /*
- * For each line, parse it into a new CLIENT struct.
- */
- while (fgets(line, C_LINELEN, fp) != NULL) {
- linecnt++; /* line counter */
- if (*line == '\0' || *line == '#') /* ignore comment */
- continue;
- if ((cp = strchr(line,'#')) != NULL) /* trash comments */
- *cp = '\0';
- cp = line; /* init `cp' */
- GETSTR; /* get RMP addr */
- if (bcp == cp) /* all delimiters */
- continue;
- /*
- * Get an RMP address from a string. Abort on failure.
- */
- if ((addr = ParseAddr(bcp)) == NULL) {
- syslog(LOG_ERR,
- "ParseConfig: line %d: can't parse <%s>",
- linecnt, bcp);
- continue;
- }
- if ((client = NewClient(addr)) == NULL) /* alloc new client */
- continue;
- GETSTR; /* get first file */
- /*
- * If no boot files are spec'd, use the default list.
- * Otherwise, validate each file (`bcp') against the
- * list of boot-able files.
- */
- i = 0;
- if (bcp == cp) /* no files spec'd */
- for (; i < C_MAXFILE && BootFiles[i] != NULL; i++)
- client->files[i] = BootFiles[i];
- else {
- do {
- /*
- * For each boot file spec'd, make sure it's
- * in our list. If so, include a pointer to
- * it in the CLIENT's list of boot files.
- */
- for (j = 0; ; j++) {
- if (j==C_MAXFILE||BootFiles[j]==NULL) {
- syslog(LOG_ERR, "ParseConfig: line %d: no boot file (%s)",
- linecnt, bcp);
- break;
- }
- if (STREQN(BootFiles[j], bcp)) {
- if (i < C_MAXFILE)
- client->files[i++] =
- BootFiles[j];
- else
- syslog(LOG_ERR, "ParseConfig: line %d: too many boot files (%s)",
- linecnt, bcp);
- break;
- }
- }
- GETSTR; /* get next file */
- } while (bcp != cp);
- /*
- * Restricted list of boot files were spec'd,
- * however, none of them were found. Since we
- * apparently can't let them boot "just anything",
- * the entire record is invalidated.
- */
- if (i == 0) {
- FreeClient(client);
- continue;
- }
- }
- /*
- * Link this client into the linked list of clients.
- * SIGHUP has already been blocked.
- */
- if (Clients)
- client->next = Clients;
- Clients = client;
- }
- (void) fclose(fp); /* close config file */
- (void) sigsetmask(omask); /* reset signal mask */
- return(1); /* return success */
- }
- /*
- ** ParseAddr -- Parse a string containing an RMP address.
- **
- ** This routine is fairly liberal at parsing an RMP address. The
- ** address must contain 6 octets consisting of between 0 and 2 hex
- ** chars (upper/lower case) separated by colons. If two colons are
- ** together (e.g. "::", the octet between them is recorded as being
- ** zero. Hence, the following addrs are all valid and parse to the
- ** same thing:
- **
- ** 08:00:09:00:66:ad 8::9:0:66:AD 8::9::66:aD
- **
- ** For clarity, an RMP address is really an Ethernet address, but
- ** since the HP boot code uses IEEE 802.3, it's really an IEEE
- ** 802.3 address. Of course, all of these are identical.
- **
- ** Parameters:
- ** str - string representation of an RMP address.
- **
- ** Returns:
- ** pointer to a static array of RMP_ADDRLEN bytes.
- **
- ** Side Effects:
- ** None.
- **
- ** Warnings:
- ** - The return value points to a static buffer; it must
- ** be copied if it's to be saved.
- */
- u_int8_t *
- ParseAddr(char *str)
- {
- static u_int8_t addr[RMP_ADDRLEN];
- char *cp;
- unsigned i;
- int part, subpart;
- memset((char *)&addr[0], 0, RMP_ADDRLEN); /* zero static buffer */
- part = subpart = 0;
- for (cp = str; *cp; cp++) {
- /*
- * A colon (`:') must be used to delimit each octet.
- */
- if (*cp == ':') {
- if (++part == RMP_ADDRLEN) /* too many parts */
- return(NULL);
- subpart = 0;
- continue;
- }
- /*
- * Convert hex character to an integer.
- */
- if (isdigit(*cp))
- i = *cp - '0';
- else {
- i = (isupper(*cp)? tolower(*cp): *cp) - 'a' + 10;
- if (i < 10 || i > 15) /* not a hex char */
- return(NULL);
- }
- if (subpart++) {
- if (subpart > 2) /* too many hex chars */
- return(NULL);
- addr[part] <<= 4;
- }
- addr[part] |= i;
- }
- if (part != (RMP_ADDRLEN-1)) /* too few parts */
- return(NULL);
- return(&addr[0]);
- }
- /*
- ** GetBootFiles -- record list of files in current (boot) directory.
- **
- ** Parameters:
- ** None.
- **
- ** Returns:
- ** Number of boot files on success, 0 on failure.
- **
- ** Side Effects:
- ** Strings in `BootFiles' are freed/allocated.
- **
- ** Warnings:
- ** - After this routine is called, ParseConfig() must be
- ** called to re-order it's list of boot file pointers.
- */
- int
- GetBootFiles(void)
- {
- DIR *dfd;
- struct stat statb;
- struct dirent *dp;
- int i;
- /*
- * Free the current list of boot files.
- */
- for (i = 0; i < C_MAXFILE && BootFiles[i] != NULL; i++) {
- FreeStr(BootFiles[i]);
- BootFiles[i] = NULL;
- }
- /*
- * Open current directory to read boot file names.
- */
- if ((dfd = opendir(".")) == NULL) { /* open BootDir */
- syslog(LOG_ERR, "GetBootFiles: can't open directory (%s)\n",
- BootDir);
- return(0);
- }
- /*
- * Read each boot file name and allocate space for it in the
- * list of boot files (BootFiles). All boot files read after
- * C_MAXFILE will be ignored.
- */
- i = 0;
- for (dp = readdir(dfd); dp != NULL; dp = readdir(dfd)) {
- if (stat(dp->d_name, &statb) < 0 ||
- (statb.st_mode & S_IFMT) != S_IFREG)
- continue;
- if (i == C_MAXFILE)
- syslog(LOG_ERR,
- "GetBootFiles: too many boot files (%s ignored)",
- dp->d_name);
- else if ((BootFiles[i] = NewStr(dp->d_name)) != NULL)
- i++;
- }
- (void) closedir(dfd); /* close BootDir */
- if (i == 0) /* can't find any boot files */
- syslog(LOG_ERR, "GetBootFiles: no boot files (%s)\n", BootDir);
- return(i);
- }