/* $OpenBSD: conf.c,v 1.42 2002/06/09 08:13:06 todd Exp $ */ /* $EOM: conf.c,v 1.48 2000/12/04 02:04:29 angelos Exp $ */ /* * Copyright (c) 1998, 1999, 2000, 2001 Niklas Hallqvist. All rights reserved. * Copyright (c) 2000, 2001, 2002 Håkan Olsson. All rights reserved. * * 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. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Ericsson Radio Systems. * 4. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. */ /* * This code was written under funding by Ericsson Radio Systems. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "sysdep.h" #include "app.h" #include "conf.h" #include "log.h" #include "util.h" static char *conf_get_trans_str (int, char *, char *); static void conf_load_defaults (int); #if 0 static int conf_find_trans_xf (int, char *); #endif struct conf_trans { TAILQ_ENTRY (conf_trans) link; int trans; enum conf_op { CONF_SET, CONF_REMOVE, CONF_REMOVE_SECTION } op; char *section; char *tag; char *value; int override; int is_default; }; TAILQ_HEAD (conf_trans_head, conf_trans) conf_trans_queue; /* * Radix-64 Encoding. */ const u_int8_t bin2asc[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; const u_int8_t asc2bin[] = { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 62, 255, 255, 255, 63, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 255, 255, 255, 255, 255, 255, 255, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 255, 255, 255, 255, 255, 255, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 255, 255, 255, 255, 255 }; struct conf_binding { LIST_ENTRY (conf_binding) link; char *section; char *tag; char *value; int is_default; }; char *conf_path = CONFIG_FILE; LIST_HEAD (conf_bindings, conf_binding) conf_bindings[256]; static char *conf_addr; static __inline__ u_int8_t conf_hash (char *s) { u_int8_t hash = 0; while (*s) { hash = ((hash << 1) | (hash >> 7)) ^ tolower (*s); s++; } return hash; } /* * Insert a tag-value combination from LINE (the equal sign is at POS) */ static int conf_remove_now (char *section, char *tag) { struct conf_binding *cb, *next; for (cb = LIST_FIRST (&conf_bindings[conf_hash (section)]); cb; cb = next) { next = LIST_NEXT (cb, link); if (strcasecmp (cb->section, section) == 0 && strcasecmp (cb->tag, tag) == 0) { LIST_REMOVE (cb, link); LOG_DBG ((LOG_MISC, 95, "[%s]:%s->%s removed", section, tag, cb->value)); free (cb->section); free (cb->tag); free (cb->value); free (cb); return 0; } } return 1; } static int conf_remove_section_now (char *section) { struct conf_binding *cb, *next; int unseen = 1; for (cb = LIST_FIRST (&conf_bindings[conf_hash (section)]); cb; cb = next) { next = LIST_NEXT (cb, link); if (strcasecmp (cb->section, section) == 0) { unseen = 0; LIST_REMOVE (cb, link); LOG_DBG ((LOG_MISC, 95, "[%s]:%s->%s removed", section, cb->tag, cb->value)); free (cb->section); free (cb->tag); free (cb->value); free (cb); } } return unseen; } /* * Insert a tag-value combination from LINE (the equal sign is at POS) * into SECTION of our configuration database. */ static int conf_set_now (char *section, char *tag, char *value, int override, int is_default) { struct conf_binding *node = 0; if (override) conf_remove_now (section, tag); else if (conf_get_str (section, tag)) { if (!is_default) log_print ("conf_set: duplicate tag [%s]:%s, ignoring...\n", section, tag); return 1; } node = calloc (1, sizeof *node); if (!node) { log_error ("conf_set: calloc (1, %lu) failed", (unsigned long)sizeof *node); return 1; } node->section = strdup (section); node->tag = strdup (tag); node->value = strdup (value); node->is_default = is_default; LIST_INSERT_HEAD (&conf_bindings[conf_hash (section)], node, link); LOG_DBG ((LOG_MISC, 95, "conf_set: [%s]:%s->%s", node->section, node->tag, node->value)); return 0; } /* * Parse the line LINE of SZ bytes. Skip Comments, recognize section * headers and feed tag-value pairs into our configuration database. */ static void conf_parse_line (int trans, char *line, size_t sz) { char *val; int i; static char *section = 0; static int ln = 0; ln++; /* Lines starting with '#' or ';' are comments. */ if (*line == '#' || *line == ';') return; /* '[section]' parsing... */ if (*line == '[') { for (i = 1; i < sz; i++) if (line[i] == ']') break; if (section) free (section); if (i == sz) { log_print ("conf_parse_line: %d:" "non-matched ']', ignoring until next section", ln); section = 0; return; } section = malloc (i); if (!section) { log_print ("conf_parse_line: %d: malloc (%d) failed", ln, i); return; } strlcpy (section, line + 1, i); return; } /* Deal with assignments. */ for (i = 0; i < sz; i++) if (line[i] == '=') { /* If no section, we are ignoring the lines. */ if (!section) { log_print ("conf_parse_line: %d: ignoring line due to no section", ln); return; } line[strcspn (line, " \t=")] = '\0'; val = line + i + 1 + strspn (line + i + 1, " \t"); /* Skip trailing whitespace, if any */ i = strcspn (val, " \t\r"); if (i) val[i] = '\0'; /* XXX Perhaps should we not ignore errors? */ conf_set (trans, section, line, val, 0, 0); return; } /* Other non-empty lines are weird. */ i = strspn (line, " \t"); if (line[i]) log_print ("conf_parse_line: %d: syntax error", ln); return; } /* Parse the mapped configuration file. */ static void conf_parse (int trans, char *buf, size_t sz) { char *cp = buf; char *bufend = buf + sz; char *line; line = cp; while (cp < bufend) { if (*cp == '\n') { /* Check for escaped newlines. */ if (cp > buf && *(cp - 1) == '\\') *(cp - 1) = *cp = ' '; else { *cp = '\0'; conf_parse_line (trans, line, cp - line); line = cp + 1; } } cp++; } if (cp != line) log_print ("conf_parse: last line non-terminated, ignored."); } /* * Auto-generate default configuration values for the transforms and * suites the user wants. * * Resulting section names can be: * For main mode: * {DES,BLF,3DES,CAST}-{MD5,SHA}[-GRP{1,2,5}][-{DSS,RSA_SIG}] * For quick mode: * QM-{proto}[-TRP]-{cipher}[-{hash}][-PFS[-{group}]]-SUITE * where * {proto} = ESP, AH * {cipher} = DES, 3DES, CAST, BLF, AES * {hash} = MD5, SHA, RIPEMD * {group} = GRP1, GRP2, GRP5 * * DH group defaults to MODP_1024. * * XXX We may want to support USE_BLOWFISH, USE_TRIPLEDES, etc... * XXX No EC2N DH support here yet. */ /* Find the value for a section+tag in the transaction list. */ static char * conf_get_trans_str (int trans, char *section, char *tag) { struct conf_trans *node, *nf = 0; for (node = TAILQ_FIRST (&conf_trans_queue); node; node = TAILQ_NEXT (node, link)) if (node->trans == trans && strcmp (section, node->section) == 0 && strcmp (tag, node->tag) == 0) { if (!nf) nf = node; else if (node->override) nf = node; } return nf ? nf->value : 0; } #if 0 /* XXX Currently unused. */ static int conf_find_trans_xf (int phase, char *xf) { struct conf_trans *node; char *p; /* Find the relevant transforms and suites, if any. */ for (node = TAILQ_FIRST (&conf_trans_queue); node; node = TAILQ_NEXT (node, link)) if ((phase == 1 && strcmp ("Transforms", node->tag) == 0) || (phase == 2 && strcmp ("Suites", node->tag) == 0)) { p = node->value; while ((p = strstr (p, xf)) != NULL) if (*(p + strlen (p)) && *(p + strlen (p)) != ',') p += strlen (p); else return 1; } return 0; } #endif static void conf_load_defaults (int tr) { #define CONF_MAX 256 int enc, auth, hash, group, group_max, proto, mode, pfs; char sect[CONF_MAX], *dflt; char *mm_auth[] = { "PRE_SHARED", "DSS", "RSA_SIG", 0 }; char *mm_hash[] = { "MD5", "SHA", 0 }; char *mm_enc[] = { "DES_CBC", "BLOWFISH_CBC", "3DES_CBC", "CAST_CBC", 0 }; char *dh_group[] = { "MODP_768", "MODP_1024", "MODP_1536", 0 }; char *qm_enc[] = { "DES", "3DES", "CAST", "BLOWFISH", "AES", 0 }; char *qm_hash[] = { "HMAC_MD5", "HMAC_SHA", "HMAC_RIPEMD", "NONE", 0 }; /* Abbreviations to make section names a bit shorter. */ char *mm_auth_p[] = { "", "-DSS", "-RSA_SIG", 0 }; char *mm_enc_p[] = { "DES", "BLF", "3DES", "CAST", 0 }; char *dh_group_p[]= { "-GRP1", "-GRP2", "-GRP5", "", 0 }; char *qm_enc_p[] = { "-DES", "-3DES", "-CAST", "-BLF", "-AES", 0 }; char *qm_hash_p[] = { "-MD5", "-SHA", "-RIPEMD", "", 0 }; /* Helper #defines, incl abbreviations. */ #define PROTO(x) ((x) ? "AH" : "ESP") #define PFS(x) ((x) ? "-PFS" : "") #define MODE(x) ((x) ? "TRANSPORT" : "TUNNEL") #define MODE_p(x) ((x) ? "-TRP" : "") group_max = sizeof dh_group / sizeof *dh_group - 1; /* General and X509 defaults */ conf_set (tr, "General", "Retransmits", CONF_DFLT_RETRANSMITS, 0, 1); conf_set (tr, "General", "Exchange-max-time", CONF_DFLT_EXCH_MAX_TIME, 0, 1); conf_set (tr, "General", "Policy-file", CONF_DFLT_POLICY_FILE, 0, 1); #ifdef USE_X509 conf_set (tr, "X509-certificates", "CA-directory", CONF_DFLT_X509_CA_DIR, 0, 1); conf_set (tr, "X509-certificates", "Cert-directory", CONF_DFLT_X509_CERT_DIR, 0, 1); conf_set (tr, "X509-certificates", "Private-key", CONF_DFLT_X509_PRIVATE_KEY, 0, 1); #endif #ifdef USE_KEYNOTE conf_set (tr, "KeyNote", "Credential-directory", CONF_DFLT_KEYNOTE_CRED_DIR, 0, 1); #endif /* Lifetimes. XXX p1/p2 vs main/quick mode may be unclear. */ dflt = conf_get_trans_str (tr, "General", "Default-phase-1-lifetime"); conf_set (tr, CONF_DFLT_TAG_LIFE_MAIN_MODE, "LIFE_TYPE", CONF_DFLT_TYPE_LIFE_MAIN_MODE, 0, 1); conf_set (tr, CONF_DFLT_TAG_LIFE_MAIN_MODE, "LIFE_DURATION", (dflt ? dflt : CONF_DFLT_VAL_LIFE_MAIN_MODE), 0, 1); dflt = conf_get_trans_str (tr, "General", "Default-phase-2-lifetime"); conf_set (tr, CONF_DFLT_TAG_LIFE_QUICK_MODE, "LIFE_TYPE", CONF_DFLT_TYPE_LIFE_QUICK_MODE, 0, 1); conf_set (tr, CONF_DFLT_TAG_LIFE_QUICK_MODE, "LIFE_DURATION", (dflt ? dflt : CONF_DFLT_VAL_LIFE_QUICK_MODE), 0, 1); /* Main modes */ for (enc = 0; mm_enc[enc]; enc ++) for (hash = 0; mm_hash[hash]; hash ++) for (auth = 0; mm_auth[auth]; auth ++) for (group = 0; dh_group_p[group]; group ++) /* special */ { snprintf (sect, CONF_MAX, "%s-%s%s%s", mm_enc_p[enc], mm_hash[hash], dh_group_p[group], mm_auth_p[auth]); #if 0 if (!conf_find_trans_xf (1, sect)) continue; #endif LOG_DBG ((LOG_MISC, 90, "conf_load_defaults : main mode %s", sect)); conf_set (tr, sect, "ENCRYPTION_ALGORITHM", mm_enc[enc], 0, 1); if (strcmp (mm_enc[enc], "BLOWFISH_CBC") == 0) conf_set (tr, sect, "KEY_LENGTH", CONF_DFLT_VAL_BLF_KEYLEN, 0, 1); conf_set (tr, sect, "HASH_ALGORITHM", mm_hash[hash], 0, 1); conf_set (tr, sect, "AUTHENTICATION_METHOD", mm_auth[auth], 0, 1); /* XXX Always DH group 2 (MODP_1024) */ conf_set (tr, sect, "GROUP_DESCRIPTION", dh_group[group < group_max ? group : 1], 0, 1); conf_set (tr, sect, "Life", CONF_DFLT_TAG_LIFE_MAIN_MODE, 0, 1); } /* Setup a default Phase 1 entry */ conf_set (tr, "Phase 1", "Default", "Default-phase-1", 0, 1); conf_set (tr, "Default-phase-1", "Phase", "1", 0, 1); conf_set (tr, "Default-phase-1", "Configuration", "Default-phase-1-configuration", 0, 1); dflt = conf_get_trans_str (tr, "General", "Default-phase-1-ID"); if (dflt) conf_set (tr, "Default-phase-1", "ID", dflt, 0, 1); conf_set (tr, "Default-phase-1-configuration", "EXCHANGE_TYPE", "ID_PROT", 0, 1); conf_set (tr, "Default-phase-1-configuration", "Transforms", "3DES-SHA-RSA_SIG", 0, 1); /* Quick modes */ for (enc = 0; qm_enc[enc]; enc ++) for (proto = 0; proto < 2; proto ++) for (mode = 0; mode < 2; mode ++) for (pfs = 0; pfs < 2; pfs ++) for (hash = 0; qm_hash[hash]; hash ++) for (group = 0; dh_group_p[group]; group ++) if ((proto == 1 && strcmp (qm_hash[hash], "NONE") == 0)) /* AH */ continue; else { char tmp[CONF_MAX]; snprintf (tmp, CONF_MAX, "QM-%s%s%s%s%s%s", PROTO (proto), MODE_p (mode), qm_enc_p[enc], qm_hash_p[hash], PFS (pfs), dh_group_p[group]); strlcpy (sect, tmp, CONF_MAX); strlcat (sect, "-SUITE", CONF_MAX); #if 0 if (!conf_find_trans_xf (2, sect)) continue; #endif LOG_DBG ((LOG_MISC, 90, "conf_load_defaults : quick mode %s", sect)); conf_set (tr, sect, "Protocols", tmp, 0, 1); snprintf (sect, CONF_MAX, "IPSEC_%s", PROTO (proto)); conf_set (tr, tmp, "PROTOCOL_ID", sect, 0, 1); strlcpy (sect, tmp, CONF_MAX); strlcat (sect, "-XF", CONF_MAX); conf_set (tr, tmp, "Transforms", sect, 0, 1); /* XXX For now, defaults contain one xf per protocol. */ conf_set (tr, sect, "TRANSFORM_ID", qm_enc[enc], 0, 1); if (strcmp (qm_enc[enc], "BLOWFISH") == 0) conf_set (tr, sect, "KEY_LENGTH", CONF_DFLT_VAL_BLF_KEYLEN, 0, 1); conf_set (tr, sect, "ENCAPSULATION_MODE", MODE (mode), 0, 1); if (strcmp (qm_hash[hash], "NONE")) { conf_set (tr, sect, "AUTHENTICATION_ALGORITHM", qm_hash[hash], 0, 1); /* XXX Another shortcut -- to keep length down. */ if (pfs) conf_set (tr, sect, "GROUP_DESCRIPTION", dh_group[group < group_max ? group : 1], 0, 1); } /* XXX Lifetimes depending on enc/auth strength? */ conf_set (tr, sect, "Life", CONF_DFLT_TAG_LIFE_QUICK_MODE, 0, 1); } return; } void conf_init (void) { int i; for (i = 0; i < sizeof conf_bindings / sizeof conf_bindings[0]; i++) LIST_INIT (&conf_bindings[i]); TAILQ_INIT (&conf_trans_queue); conf_reinit (); } /* Open the config file and map it into our address space, then parse it. */ void conf_reinit (void) { struct conf_binding *cb = 0; int fd, i, trans; size_t sz; char *new_conf_addr = 0; struct stat sb; if ((stat (conf_path, &sb) == 0) || (errno != ENOENT)) { if (check_file_secrecy (conf_path, &sz)) return; fd = open (conf_path, O_RDONLY); if (fd == -1) { log_error ("conf_reinit: open (\"%s\", O_RDONLY) failed", conf_path); return; } new_conf_addr = malloc (sz); if (!new_conf_addr) { log_error ("conf_reinit: malloc (%lu) failed", (unsigned long)sz); goto fail; } /* XXX I assume short reads won't happen here. */ if (read (fd, new_conf_addr, sz) != sz) { log_error ("conf_reinit: read (%d, %p, %lu) failed", fd, new_conf_addr, (unsigned long)sz); goto fail; } close (fd); trans = conf_begin (); /* XXX Should we not care about errors and rollback? */ conf_parse (trans, new_conf_addr, sz); } else trans = conf_begin (); /* Load default configuration values. */ conf_load_defaults (trans); /* Free potential existing configuration. */ if (conf_addr) { for (i = 0; i < sizeof conf_bindings / sizeof conf_bindings[0]; i++) for (cb = LIST_FIRST (&conf_bindings[i]); cb; cb = LIST_FIRST (&conf_bindings[i])) conf_remove_now (cb->section, cb->tag); free (conf_addr); } conf_end (trans, 1); conf_addr = new_conf_addr; return; fail: if (new_conf_addr) free (new_conf_addr); close (fd); } /* * Return the numeric value denoted by TAG in section SECTION or DEF * if that tag does not exist. */ int conf_get_num (char *section, char *tag, int def) { char *value = conf_get_str (section, tag); if (value) return atoi (value); return def; } /* * Return the socket endpoint address denoted by TAG in SECTION as a * struct sockaddr. It is the callers responsibility to deallocate * this structure when it is finished with it. */ struct sockaddr * conf_get_address (char *section, char *tag) { char *value = conf_get_str (section, tag); struct sockaddr *sa; if (!value) return 0; if (text2sockaddr (value, 0, &sa) == -1) return 0; return sa; } /* Validate X according to the range denoted by TAG in section SECTION. */ int conf_match_num (char *section, char *tag, int x) { char *value = conf_get_str (section, tag); int val, min, max, n; if (!value) return 0; n = sscanf (value, "%d,%d:%d", &val, &min, &max); switch (n) { case 1: LOG_DBG ((LOG_MISC, 90, "conf_match_num: %s:%s %d==%d?", section, tag, val, x)); return x == val; case 3: LOG_DBG ((LOG_MISC, 90, "conf_match_num: %s:%s %d<=%d<=%d?", section, tag, min, x, max)); return min <= x && max >= x; default: log_error ("conf_match_num: section %s tag %s: invalid number spec %s", section, tag, value); } return 0; } /* Return the string value denoted by TAG in section SECTION. */ char * conf_get_str (char *section, char *tag) { struct conf_binding *cb; for (cb = LIST_FIRST (&conf_bindings[conf_hash (section)]); cb; cb = LIST_NEXT (cb, link)) if (strcasecmp (section, cb->section) == 0 && strcasecmp (tag, cb->tag) == 0) { LOG_DBG ((LOG_MISC, 95, "conf_get_str: [%s]:%s->%s", section, tag, cb->value)); return cb->value; } LOG_DBG ((LOG_MISC, 95, "conf_get_str: configuration value not found [%s]:%s", section, tag)); return 0; } /* * Build a list of string values out of the comma separated value denoted by * TAG in SECTION. */ struct conf_list * conf_get_list (char *section, char *tag) { char *liststr = 0, *p, *field; struct conf_list *list = 0; struct conf_list_node *node; list = malloc (sizeof *list); if (!list) goto cleanup; TAILQ_INIT (&list->fields); list->cnt = 0; liststr = conf_get_str (section, tag); if (!liststr) goto cleanup; liststr = strdup (liststr); if (!liststr) goto cleanup; p = liststr; while ((field = strsep (&p, ", \t")) != NULL) { if (*field == '\0') { log_print ("conf_get_list: empty field, ignoring..."); continue; } list->cnt++; node = calloc (1, sizeof *node); if (!node) goto cleanup; node->field = strdup (field); if (!node->field) goto cleanup; TAILQ_INSERT_TAIL (&list->fields, node, link); } free (liststr); return list; cleanup: if (list) conf_free_list (list); if (liststr) free (liststr); return 0; } struct conf_list * conf_get_tag_list (char *section) { struct conf_list *list = 0; struct conf_list_node *node; struct conf_binding *cb; list = malloc (sizeof *list); if (!list) goto cleanup; TAILQ_INIT (&list->fields); list->cnt = 0; for (cb = LIST_FIRST (&conf_bindings[conf_hash (section)]); cb; cb = LIST_NEXT (cb, link)) if (strcasecmp (section, cb->section) == 0) { list->cnt++; node = calloc (1, sizeof *node); if (!node) goto cleanup; node->field = strdup (cb->tag); if (!node->field) goto cleanup; TAILQ_INSERT_TAIL (&list->fields, node, link); } return list; cleanup: if (list) conf_free_list (list); return 0; } /* Decode a PEM encoded buffer. */ int conf_decode_base64 (u_int8_t *out, u_int32_t *len, u_char *buf) { u_int32_t c = 0; u_int8_t c1, c2, c3, c4; while (*buf) { if (*buf > 127 || (c1 = asc2bin[*buf]) == 255) return 0; buf++; if (*buf > 127 || (c2 = asc2bin[*buf]) == 255) return 0; buf++; if (*buf == '=') { c3 = c4 = 0; c++; /* Check last four bit */ if (c2 & 0xF) return 0; if (strcmp (buf, "==") == 0) buf++; else return 0; } else if (*buf > 127 || (c3 = asc2bin[*buf]) == 255) return 0; else { if (*++buf == '=') { c4 = 0; c += 2; /* Check last two bit */ if (c3 & 3) return 0; if (strcmp (buf, "=")) return 0; } else if (*buf > 127 || (c4 = asc2bin[*buf]) == 255) return 0; else c += 3; } buf++; *out++ = (c1 << 2) | (c2 >> 4); *out++ = (c2 << 4) | (c3 >> 2); *out++ = (c3 << 6) | c4; } *len = c; return 1; } /* Read a line from a stream to the buffer. */ int conf_get_line (FILE *stream, char *buf, u_int32_t len) { int c; while (len-- > 1) { c = fgetc (stream); if (c == '\n') { *buf = 0; return 1; } else if (c == EOF) break; *buf++ = c; } *buf = 0; return 0; } void conf_free_list (struct conf_list *list) { struct conf_list_node *node = TAILQ_FIRST (&list->fields); while (node) { TAILQ_REMOVE (&list->fields, node, link); if (node->field) free (node->field); free (node); node = TAILQ_FIRST (&list->fields); } free (list); } int conf_begin (void) { static int seq = 0; return ++seq; } static struct conf_trans * conf_trans_node (int transaction, enum conf_op op) { struct conf_trans *node; node = calloc (1, sizeof *node); if (!node) { log_error ("conf_trans_node: calloc (1, %lu) failed", (unsigned long)sizeof *node); return 0; } node->trans = transaction; node->op = op; TAILQ_INSERT_TAIL (&conf_trans_queue, node, link); return node; } /* Queue a set operation. */ int conf_set (int transaction, char *section, char *tag, char *value, int override, int is_default) { struct conf_trans *node; node = conf_trans_node (transaction, CONF_SET); if (!node) return 1; node->section = strdup (section); if (!node->section) { log_error ("conf_set: strdup (\"%s\") failed", section); goto fail; } node->tag = strdup (tag); if (!node->tag) { log_error ("conf_set: strdup (\"%s\") failed", tag); goto fail; } node->value = strdup (value); if (!node->value) { log_error ("conf_set: strdup (\"%s\") failed", value); goto fail; } node->override = override; node->is_default = is_default; return 0; fail: if (node->tag) free (node->tag); if (node->section) free (node->section); if (node) free (node); return 1; } /* Queue a remove operation. */ int conf_remove (int transaction, char *section, char *tag) { struct conf_trans *node; node = conf_trans_node (transaction, CONF_REMOVE); if (!node) goto fail; node->section = strdup (section); if (!node->section) { log_error ("conf_remove: strdup (\"%s\") failed", section); goto fail; } node->tag = strdup (tag); if (!node->tag) { log_error ("conf_remove: strdup (\"%s\") failed", tag); goto fail; } return 0; fail: if (node->section) free (node->section); if (node) free (node); return 1; } /* Queue a remove section operation. */ int conf_remove_section (int transaction, char *section) { struct conf_trans *node; node = conf_trans_node (transaction, CONF_REMOVE_SECTION); if (!node) goto fail; node->section = strdup (section); if (!node->section) { log_error ("conf_remove_section: strdup (\"%s\") failed", section); goto fail; } return 0; fail: if (node) free (node); return 1; } /* Execute all queued operations for this transaction. Cleanup. */ int conf_end (int transaction, int commit) { struct conf_trans *node, *next; for (node = TAILQ_FIRST (&conf_trans_queue); node; node = next) { next = TAILQ_NEXT (node, link); if (node->trans == transaction) { if (commit) switch (node->op) { case CONF_SET: conf_set_now (node->section, node->tag, node->value, node->override, node->is_default); break; case CONF_REMOVE: conf_remove_now (node->section, node->tag); break; case CONF_REMOVE_SECTION: conf_remove_section_now (node->section); break; default: log_print ("conf_end: unknown operation: %d", node->op); } TAILQ_REMOVE (&conf_trans_queue, node, link); if (node->section) free (node->section); if (node->tag) free (node->tag); if (node->value) free (node->value); free (node); } } return 0; } /* * Dump running configuration upon SIGUSR1. * Configuration is "stored in reverse order", so reverse it again. */ struct dumper { char *s, *v; struct dumper *next; }; static void conf_report_dump (struct dumper *node) { /* Recursive, cleanup when we're done. */ if (node->next) conf_report_dump (node->next); if (node->v) LOG_DBG ((LOG_REPORT, 0, "%s=\t%s", node->s, node->v)); else if (node->s) { LOG_DBG ((LOG_REPORT, 0, "%s", node->s)); if (strlen (node->s) > 0) free (node->s); } free (node); } void conf_report (void) { struct conf_binding *cb, *last = 0; int i, len; char *current_section = (char *)0; struct dumper *dumper, *dnode; dumper = dnode = (struct dumper *)calloc (1, sizeof *dumper); if (!dumper) goto mem_fail; LOG_DBG ((LOG_REPORT, 0, "conf_report: dumping running configuration")); for (i = 0; i < sizeof conf_bindings / sizeof conf_bindings[0]; i++) for (cb = LIST_FIRST (&conf_bindings[i]); cb; cb = LIST_NEXT (cb, link)) { if (!cb->is_default) { /* Dump this entry. */ if (!current_section || strcmp (cb->section, current_section)) { if (current_section) { len = strlen (current_section) + 3; dnode->s = malloc (len); if (!dnode->s) goto mem_fail; snprintf (dnode->s, len, "[%s]", current_section); dnode->next = (struct dumper *)calloc (1, sizeof (struct dumper)); dnode = dnode->next; if (!dnode) goto mem_fail; dnode->s = ""; dnode->next = (struct dumper *)calloc (1, sizeof (struct dumper)); dnode = dnode->next; if (!dnode) goto mem_fail; } current_section = cb->section; } dnode->s = cb->tag; dnode->v = cb->value; dnode->next = (struct dumper *)calloc (1, sizeof (struct dumper)); dnode = dnode->next; if (!dnode) goto mem_fail; last = cb; } } if (last) { len = strlen (last->section) + 3; dnode->s = malloc (len); if (!dnode->s) goto mem_fail; snprintf (dnode->s, len, "[%s]", last->section); } conf_report_dump (dumper); return; mem_fail: log_error ("conf_report: malloc/calloc failed"); while ((dnode = dumper) != 0) { dumper = dumper->next; if (dnode->s) free (dnode->s); free (dnode); } return; }