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-rw-r--r--1.2-netsec/enum.c666
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diff --git a/1.2-netsec/enum.c b/1.2-netsec/enum.c
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--- a/1.2-netsec/enum.c
+++ /dev/null
@@ -1,666 +0,0 @@
-/*
- * Asterisk -- An open source telephony toolkit.
- *
- * Copyright (C) 1999 - 2005, Digium, Inc.
- *
- * Mark Spencer <markster@digium.com>
- *
- * Funding provided by nic.at
- *
- * See http://www.asterisk.org for more information about
- * the Asterisk project. Please do not directly contact
- * any of the maintainers of this project for assistance;
- * the project provides a web site, mailing lists and IRC
- * channels for your use.
- *
- * This program is free software, distributed under the terms of
- * the GNU General Public License Version 2. See the LICENSE file
- * at the top of the source tree.
- */
-
-/*! \file
- *
- * \brief ENUM Support for Asterisk
- *
- */
-
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <arpa/nameser.h>
-#if __APPLE_CC__ >= 1495
-#include <arpa/nameser_compat.h>
-#endif
-#include <resolv.h>
-#include <stdlib.h>
-#include <string.h>
-#include <ctype.h>
-#include <regex.h>
-#include <unistd.h>
-#include <errno.h>
-
-#include "asterisk.h"
-
-ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
-
-#include "asterisk/logger.h"
-#include "asterisk/options.h"
-#include "asterisk/enum.h"
-#include "asterisk/dns.h"
-#include "asterisk/channel.h"
-#include "asterisk/config.h"
-#include "asterisk/utils.h"
-
-#ifdef __APPLE__
-#undef T_NAPTR
-#define T_NAPTR 35
-#endif
-
-#ifdef __APPLE__
-#undef T_TXT
-#define T_TXT 16
-#endif
-
-/* The IETF Enum standard root, managed by the ITU */
-#define TOPLEV "e164.arpa."
-
-/* Linked list from config file */
-static struct enum_search {
- char toplev[512];
- struct enum_search *next;
-} *toplevs;
-
-static int enumver = 0;
-
-AST_MUTEX_DEFINE_STATIC(enumlock);
-
-struct naptr {
- unsigned short order;
- unsigned short pref;
-} __attribute__ ((__packed__));
-
-/*--- parse_ie: Parse NAPTR record information elements */
-static int parse_ie(char *data, int maxdatalen, char *src, int srclen)
-{
- int len, olen;
-
- len = olen = (int)src[0];
- src++;
- srclen--;
- if (len > srclen) {
- ast_log(LOG_WARNING, "Want %d, got %d\n", len, srclen);
- return -1;
- }
- if (len > maxdatalen)
- len = maxdatalen;
- memcpy(data, src, len);
- return olen + 1;
-}
-
-/*--- parse_naptr: Parse DNS NAPTR record used in ENUM ---*/
-static int parse_naptr(char *dst, int dstsize, char *tech, int techsize, char *answer, int len, char *naptrinput)
-{
-
- char tech_return[80];
- char *oanswer = answer;
- char flags[512] = "";
- char services[512] = "";
- char *p;
- char regexp[512] = "";
- char repl[512] = "";
- char temp[512] = "";
- char delim;
- char *delim2;
- char *pattern, *subst, *d;
- int res;
- int regexp_len, size, backref;
- int d_len = sizeof(temp) - 1;
- regex_t preg;
- regmatch_t pmatch[9];
-
- tech_return[0] = '\0';
-
- dst[0] = '\0';
-
- if (len < sizeof(struct naptr)) {
- ast_log(LOG_WARNING, "NAPTR record length too short\n");
- return -1;
- }
- answer += sizeof(struct naptr);
- len -= sizeof(struct naptr);
- if ((res = parse_ie(flags, sizeof(flags) - 1, answer, len)) < 0) {
- ast_log(LOG_WARNING, "Failed to get flags from NAPTR record\n");
- return -1;
- } else {
- answer += res;
- len -= res;
- }
- if ((res = parse_ie(services, sizeof(services) - 1, answer, len)) < 0) {
- ast_log(LOG_WARNING, "Failed to get services from NAPTR record\n");
- return -1;
- } else {
- answer += res;
- len -= res;
- }
- if ((res = parse_ie(regexp, sizeof(regexp) - 1, answer, len)) < 0) {
- ast_log(LOG_WARNING, "Failed to get regexp from NAPTR record\n");
- return -1;
- } else {
- answer += res;
- len -= res;
- }
-
- if ((res = dn_expand((unsigned char *)oanswer, (unsigned char *)answer + len, (unsigned char *)answer, repl, sizeof(repl) - 1)) < 0) {
- ast_log(LOG_WARNING, "Failed to expand hostname\n");
- return -1;
- }
-
- if (option_debug > 2) /* Advanced NAPTR debugging */
- ast_log(LOG_DEBUG, "NAPTR input='%s', flags='%s', services='%s', regexp='%s', repl='%s'\n",
- naptrinput, flags, services, regexp, repl);
-
- if (tolower(flags[0]) != 'u') {
- ast_log(LOG_WARNING, "NAPTR Flag must be 'U' or 'u'.\n");
- return -1;
- }
-
- p = strstr(services, "e2u+");
- if (p == NULL)
- p = strstr(services, "E2U+");
- if (p){
- p = p + 4;
- if (strchr(p, ':')){
- p = strchr(p, ':') + 1;
- }
- ast_copy_string(tech_return, p, sizeof(tech_return));
- } else {
-
- p = strstr(services, "+e2u");
- if (p == NULL)
- p = strstr(services, "+E2U");
- if (p) {
- *p = 0;
- p = strchr(services, ':');
- if (p)
- *p = 0;
- ast_copy_string(tech_return, services, sizeof(tech_return));
- }
- }
-
- /* DEDBUGGING STUB
- ast_copy_string(regexp, "!^\\+43(.*)$!\\1@bla.fasel!", sizeof(regexp) - 1);
- */
-
- regexp_len = strlen(regexp);
- if (regexp_len < 7) {
- ast_log(LOG_WARNING, "Regex too short to be meaningful.\n");
- return -1;
- }
-
-
- delim = regexp[0];
- delim2 = strchr(regexp + 1, delim);
- if ((delim2 == NULL) || (regexp[regexp_len-1] != delim)) {
- ast_log(LOG_WARNING, "Regex delimiter error (on \"%s\").\n",regexp);
- return -1;
- }
-
- pattern = regexp + 1;
- *delim2 = 0;
- subst = delim2 + 1;
- regexp[regexp_len-1] = 0;
-
-#if 0
- printf("Pattern: %s\n", pattern);
- printf("Subst: %s\n", subst);
- printf("Input: %s\n", naptrinput);
-#endif
-
-/*
- * now do the regex wizardry.
- */
-
- if (regcomp(&preg, pattern, REG_EXTENDED | REG_NEWLINE)) {
- ast_log(LOG_WARNING, "NAPTR Regex compilation error (regex = \"%s\").\n",regexp);
- return -1;
- }
-
- if (preg.re_nsub > 9) {
- ast_log(LOG_WARNING, "NAPTR Regex compilation error: too many subs.\n");
- regfree(&preg);
- return -1;
- }
-
- if (regexec(&preg, naptrinput, 9, pmatch, 0)) {
- ast_log(LOG_WARNING, "NAPTR Regex match failed.\n");
- regfree(&preg);
- return -1;
- }
- regfree(&preg);
-
- d = temp;
- d_len--;
- while (*subst && (d_len > 0)) {
- if ((subst[0] == '\\') && isdigit(subst[1]) && (pmatch[subst[1]-'0'].rm_so != -1)) {
- backref = subst[1]-'0';
- size = pmatch[backref].rm_eo - pmatch[backref].rm_so;
- if (size > d_len) {
- ast_log(LOG_WARNING, "Not enough space during NAPTR regex substitution.\n");
- return -1;
- }
- memcpy(d, naptrinput + pmatch[backref].rm_so, size);
- d += size;
- d_len -= size;
- subst += 2;
- } else if (isprint(*subst)) {
- *d++ = *subst++;
- d_len--;
- } else {
- ast_log(LOG_WARNING, "Error during regex substitution.\n");
- return -1;
- }
- }
- *d = 0;
- ast_copy_string(dst, temp, dstsize);
- dst[dstsize - 1] = '\0';
-
- if (*tech != '\0'){ /* check if it is requested NAPTR */
- if (!strncasecmp(tech, "ALL", techsize)){
- return 1; /* return or count any RR */
- }
- if (!strncasecmp(tech_return, tech, sizeof(tech_return)<techsize?sizeof(tech_return):techsize)){
- ast_copy_string(tech, tech_return, techsize);
- return 1; /* we got out RR */
- } else { /* go to the next RR in the DNS answer */
- return 0;
- }
- }
-
- /* tech was not specified, return first parsed RR */
- ast_copy_string(tech, tech_return, techsize);
-
- return 1;
-}
-
-/* do not return requested value, just count RRs and return thei number in dst */
-#define ENUMLOOKUP_OPTIONS_COUNT 1
-
-struct enum_naptr_rr {
- struct naptr naptr; /* order and preference of RR */
- char *result; /* result of naptr parsing,e.g.: tel:+5553 */
- char *tech; /* Technology (from URL scheme) */
- int sort_pos; /* sort position */
-};
-
-struct enum_context {
- char *dst; /* Destination part of URL from ENUM */
- int dstlen; /* Length */
- char *tech; /* Technology (from URL scheme) */
- int techlen; /* Length */
- char *txt; /* TXT record in TXT lookup */
- int txtlen; /* Length */
- char *naptrinput; /* The number to lookup */
- int position; /* used as counter for RRs or specifies position of required RR */
- int options; /* options , see ENUMLOOKUP_OPTIONS_* defined above */
- struct enum_naptr_rr *naptr_rrs; /* array of parsed NAPTR RRs */
- int naptr_rrs_count; /* Size of array naptr_rrs */
-};
-
-/*--- txt_callback: Callback for TXT record lookup */
-static int txt_callback(void *context, char *answer, int len, char *fullanswer)
-{
- struct enum_context *c = (struct enum_context *)context;
-#if 0
- printf("ENUMTXT Called\n");
-#endif
-
- if (answer == NULL) {
- c->txt = NULL;
- c->txtlen = 0;
- return 0;
- }
-
- /* skip over first byte, as for some reason it's a vertical tab character */
- answer += 1;
- len -= 1;
-
- /* answer is not null-terminated, but should be */
- /* this is safe to do, as answer has extra bytes on the end we can
- safely overwrite with a null */
- answer[len] = '\0';
- /* now increment len so that len includes the null, so that we can
- compare apples to apples */
- len +=1;
-
- /* finally, copy the answer into c->txt */
- ast_copy_string(c->txt, answer, len < c->txtlen ? len : (c->txtlen));
-
- /* just to be safe, let's make sure c->txt is null terminated */
- c->txt[(c->txtlen)-1] = '\0';
-
- return 1;
-}
-
-/*--- enum_callback: Callback from ENUM lookup function */
-static int enum_callback(void *context, char *answer, int len, char *fullanswer)
-{
- struct enum_context *c = (struct enum_context *)context;
- void *p = NULL;
- int res;
-
- res = parse_naptr(c->dst, c->dstlen, c->tech, c->techlen, answer, len, c->naptrinput);
-
- if (res < 0) {
- ast_log(LOG_WARNING, "Failed to parse naptr :(\n");
- return -1;
- } else if (res > 0 && !ast_strlen_zero(c->dst)){ /* ok, we got needed NAPTR */
- if (c->options & ENUMLOOKUP_OPTIONS_COUNT){ /* counting RRs */
- c->position++;
- snprintf(c->dst, c->dstlen, "%d", c->position);
- } else {
- p = realloc(c->naptr_rrs, sizeof(struct enum_naptr_rr)*(c->naptr_rrs_count+1));
- if (p) {
- c->naptr_rrs = (struct enum_naptr_rr*)p;
- memcpy(&c->naptr_rrs[c->naptr_rrs_count].naptr, answer, sizeof(struct naptr));
- /* printf("order=%d, pref=%d\n", ntohs(c->naptr_rrs[c->naptr_rrs_count].naptr.order), ntohs(c->naptr_rrs[c->naptr_rrs_count].naptr.pref)); */
- c->naptr_rrs[c->naptr_rrs_count].result = strdup(c->dst);
- c->naptr_rrs[c->naptr_rrs_count].tech = strdup(c->tech);
- c->naptr_rrs[c->naptr_rrs_count].sort_pos = c->naptr_rrs_count;
- c->naptr_rrs_count++;
- }
- c->dst[0] = 0;
- }
- return 0;
- }
-
- if (c->options & ENUMLOOKUP_OPTIONS_COUNT) { /* counting RRs */
- snprintf(c->dst, c->dstlen, "%d", c->position);
- }
-
- return 0;
-}
-
-/*--- ast_get_enum: ENUM lookup */
-int ast_get_enum(struct ast_channel *chan, const char *number, char *dst, int dstlen, char *tech, int techlen, char* suffix, char* options)
-{
- struct enum_context context;
- char tmp[259 + 512];
- char naptrinput[512];
- int pos = strlen(number) - 1;
- int newpos = 0;
- int ret = -1;
- struct enum_search *s = NULL;
- int version = -1;
- /* for ISN rewrite */
- char *p1 = NULL;
- char *p2 = NULL;
- int k = 0;
- int i = 0;
- int z = 0;
-
- if (number[0] == 'n') {
- strncpy(naptrinput, number+1, sizeof(naptrinput));
- } else {
- strncpy(naptrinput, number, sizeof(naptrinput));
- }
-
- context.naptrinput = naptrinput; /* The number */
- context.dst = dst; /* Return string */
- context.dstlen = dstlen;
- context.tech = tech;
- context.techlen = techlen;
- context.options = 0;
- context.position = 1;
- context.naptr_rrs = NULL;
- context.naptr_rrs_count = 0;
-
- if (options != NULL){
- if (*options == 'c'){
- context.options = ENUMLOOKUP_OPTIONS_COUNT;
- context.position = 0;
- } else {
- context.position = atoi(options);
- if (context.position < 1)
- context.position = 1;
- }
- }
-
- if (pos > 128)
- pos = 128;
-
- /* ISN rewrite */
- p1 = strchr(number, '*');
-
- if (number[0] == 'n') { /* do not perform ISN rewrite ('n' is testing flag) */
- p1 = NULL;
- k = 1; /* strip 'n' from number */
- }
-
- if (p1 != NULL) {
- p2 = p1+1;
- while (p1 > number){
- p1--;
- tmp[newpos++] = *p1;
- tmp[newpos++] = '.';
- }
- if (*p2) {
- while(*p2 && newpos < 128){
- tmp[newpos++] = *p2;
- p2++;
- }
- tmp[newpos++] = '.';
- }
-
- } else {
- while (pos >= k) {
- if (isdigit(number[pos])) {
- tmp[newpos++] = number[pos];
- tmp[newpos++] = '.';
- }
- pos--;
- }
- }
-
- if (chan && ast_autoservice_start(chan) < 0)
- return -1;
-
- for (;;) {
- ast_mutex_lock(&enumlock);
- if (version != enumver) {
- /* Ooh, a reload... */
- s = toplevs;
- version = enumver;
- } else {
- s = s->next;
- }
- if (suffix != NULL) {
- strncpy(tmp + newpos, suffix, sizeof(tmp) - newpos - 1);
- } else if (s) {
- strncpy(tmp + newpos, s->toplev, sizeof(tmp) - newpos - 1);
- }
- ast_mutex_unlock(&enumlock);
- if (!s)
- break;
- ret = ast_search_dns(&context, tmp, C_IN, T_NAPTR, enum_callback);
- if (ret > 0)
- break;
- if (suffix != NULL)
- break;
- }
- if (ret < 0) {
- ast_log(LOG_DEBUG, "No such number found: %s (%s)\n", tmp, strerror(errno));
- ret = 0;
- }
-
- if (context.naptr_rrs_count >= context.position && ! (context.options & ENUMLOOKUP_OPTIONS_COUNT)) {
- /* sort array by NAPTR order/preference */
- for (k=0; k<context.naptr_rrs_count; k++) {
- for (i=0; i<context.naptr_rrs_count; i++) {
- /* use order first and then preference to compare */
- if ((ntohs(context.naptr_rrs[k].naptr.order) < ntohs(context.naptr_rrs[i].naptr.order)
- && context.naptr_rrs[k].sort_pos > context.naptr_rrs[i].sort_pos)
- || (ntohs(context.naptr_rrs[k].naptr.order) > ntohs(context.naptr_rrs[i].naptr.order)
- && context.naptr_rrs[k].sort_pos < context.naptr_rrs[i].sort_pos)){
- z = context.naptr_rrs[k].sort_pos;
- context.naptr_rrs[k].sort_pos = context.naptr_rrs[i].sort_pos;
- context.naptr_rrs[i].sort_pos = z;
- continue;
- }
- if (ntohs(context.naptr_rrs[k].naptr.order) == ntohs(context.naptr_rrs[i].naptr.order)) {
- if ((ntohs(context.naptr_rrs[k].naptr.pref) < ntohs(context.naptr_rrs[i].naptr.pref)
- && context.naptr_rrs[k].sort_pos > context.naptr_rrs[i].sort_pos)
- || (ntohs(context.naptr_rrs[k].naptr.pref) > ntohs(context.naptr_rrs[i].naptr.pref)
- && context.naptr_rrs[k].sort_pos < context.naptr_rrs[i].sort_pos)){
- z = context.naptr_rrs[k].sort_pos;
- context.naptr_rrs[k].sort_pos = context.naptr_rrs[i].sort_pos;
- context.naptr_rrs[i].sort_pos = z;
- }
- }
- }
- }
- for (k=0; k<context.naptr_rrs_count; k++) {
- if (context.naptr_rrs[k].sort_pos == context.position-1) {
- ast_copy_string(context.dst, context.naptr_rrs[k].result, dstlen);
- ast_copy_string(context.tech, context.naptr_rrs[k].tech, techlen);
- break;
- }
- }
- } else if (!(context.options & ENUMLOOKUP_OPTIONS_COUNT)) {
- context.dst[0] = 0;
- }
-
- if (chan)
- ret |= ast_autoservice_stop(chan);
-
- for (k=0; k<context.naptr_rrs_count; k++) {
- free(context.naptr_rrs[k].result);
- free(context.naptr_rrs[k].tech);
- }
-
- free(context.naptr_rrs);
-
- return ret;
-}
-
-/*--- ast_get_txt: Get TXT record from DNS.
- Really has nothing to do with enum, but anyway...
- */
-int ast_get_txt(struct ast_channel *chan, const char *number, char *dst, int dstlen, char *tech, int techlen, char *txt, int txtlen)
-{
- struct enum_context context;
- char tmp[259 + 512];
- char naptrinput[512] = "+";
- int pos = strlen(number) - 1;
- int newpos = 0;
- int ret = -1;
- struct enum_search *s = NULL;
- int version = -1;
-
- strncat(naptrinput, number, sizeof(naptrinput) - 2);
-
- context.naptrinput = naptrinput;
- context.dst = dst;
- context.dstlen = dstlen;
- context.tech = tech;
- context.techlen = techlen;
- context.txt = txt;
- context.txtlen = txtlen;
-
- if (pos > 128)
- pos = 128;
- while (pos >= 0) {
- tmp[newpos++] = number[pos--];
- tmp[newpos++] = '.';
- }
-
- if (chan && ast_autoservice_start(chan) < 0)
- return -1;
-
- for (;;) {
- ast_mutex_lock(&enumlock);
- if (version != enumver) {
- /* Ooh, a reload... */
- s = toplevs;
- version = enumver;
- } else {
- s = s->next;
- }
- if (s) {
- strncpy(tmp + newpos, s->toplev, sizeof(tmp) - newpos - 1);
- }
- ast_mutex_unlock(&enumlock);
- if (!s)
- break;
-
- ret = ast_search_dns(&context, tmp, C_IN, T_TXT, txt_callback);
- if (ret > 0)
- break;
- }
- if (ret < 0) {
- ast_log(LOG_DEBUG, "No such number found: %s (%s)\n", tmp, strerror(errno));
- ret = 0;
- }
- if (chan)
- ret |= ast_autoservice_stop(chan);
- return ret;
-}
-
-/*--- enum_newtoplev: Add enum tree to linked list ---*/
-static struct enum_search *enum_newtoplev(char *s)
-{
- struct enum_search *tmp;
-
- tmp = malloc(sizeof(struct enum_search));
- if (tmp) {
- memset(tmp, 0, sizeof(struct enum_search));
- ast_copy_string(tmp->toplev, s, sizeof(tmp->toplev));
- }
- return tmp;
-}
-
-/*--- ast_enum_init: Initialize the ENUM support subsystem */
-int ast_enum_init(void)
-{
- struct ast_config *cfg;
- struct enum_search *s, *sl;
- struct ast_variable *v;
-
- /* Destroy existing list */
- ast_mutex_lock(&enumlock);
- s = toplevs;
- while(s) {
- sl = s;
- s = s->next;
- free(sl);
- }
- toplevs = NULL;
- cfg = ast_config_load("enum.conf");
- if (cfg) {
- sl = NULL;
- v = ast_variable_browse(cfg, "general");
- while(v) {
- if (!strcasecmp(v->name, "search")) {
- s = enum_newtoplev(v->value);
- if (s) {
- if (sl)
- sl->next = s;
- else
- toplevs = s;
- sl = s;
- }
- }
- v = v->next;
- }
- ast_config_destroy(cfg);
- } else {
- toplevs = enum_newtoplev(TOPLEV);
- }
- enumver++;
- ast_mutex_unlock(&enumlock);
- return 0;
-}
-
-int ast_enum_reload(void)
-{
- return ast_enum_init();
-}
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