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3791 lines (3220 loc) · 106 KB
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/*
* FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
* Copyright (C) 2005-2014, Anthony Minessale II <[email protected]>
*
* Version: MPL 1.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
*
* The Initial Developer of the Original Code is
* Anthony Minessale II <[email protected]>
* Portions created by the Initial Developer are Copyright (C)
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Anthony Minessale II <[email protected]>
* Simon Capper <[email protected]>
* Marc Olivier Chouinard <[email protected]>
* Raymond Chandler <[email protected]>
*
* switch_xml.c -- XML PARSER
*
* Derived from ezxml http://ezxml.sourceforge.net
* Original Copyright
*
* Copyright 2004, 2006 Aaron Voisine <[email protected]>
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <switch.h>
#include <switch_stun.h>
#ifndef WIN32
#include <sys/wait.h>
#include <switch_private.h>
#include <glob.h>
#else /* we're on windoze :( */
/* glob functions at end of this file */
#include <apr_file_io.h>
typedef struct {
size_t gl_pathc; /* Count of total paths so far. */
size_t gl_matchc; /* Count of paths matching pattern. */
size_t gl_offs; /* Reserved at beginning of gl_pathv. */
int gl_flags; /* Copy of flags parameter to glob. */
char **gl_pathv; /* List of paths matching pattern. */
/* Copy of errfunc parameter to glob. */
int (*gl_errfunc) (const char *, int);
} glob_t;
/* Believed to have been introduced in 1003.2-1992 */
#define GLOB_APPEND 0x0001 /* Append to output from previous call. */
#define GLOB_DOOFFS 0x0002 /* Use gl_offs. */
#define GLOB_ERR 0x0004 /* Return on error. */
#define GLOB_MARK 0x0008 /* Append / to matching directories. */
#define GLOB_NOCHECK 0x0010 /* Return pattern itself if nothing matches. */
#define GLOB_NOSORT 0x0020 /* Don't sort. */
/* Error values returned by glob(3) */
#define GLOB_NOSPACE (-1) /* Malloc call failed. */
#define GLOB_ABORTED (-2) /* Unignored error. */
#define GLOB_NOMATCH (-3) /* No match and GLOB_NOCHECK was not set. */
#define GLOB_NOSYS (-4) /* Obsolete: source comptability only. */
#define GLOB_ALTDIRFUNC 0x0040 /* Use alternately specified directory funcs. */
#define GLOB_MAGCHAR 0x0100 /* Pattern had globbing characters. */
#define GLOB_NOMAGIC 0x0200 /* GLOB_NOCHECK without magic chars (csh). */
#define GLOB_QUOTE 0x0400 /* Quote special chars with \. */
#define GLOB_LIMIT 0x1000 /* limit number of returned paths */
int glob(const char *, int, int (*)(const char *, int), glob_t *);
void globfree(glob_t *);
#endif
#define SWITCH_XML_WS "\t\r\n " /* whitespace */
#define SWITCH_XML_ERRL 128 /* maximum error string length */
static void preprocess_exec_set(char *keyval)
{
char *key = keyval;
char *val = strchr(keyval, '=');
if (val) {
char *ve = val++;
while (*val && *val == ' ') {
val++;
}
*ve-- = '\0';
while (*ve && *ve == ' ') {
*ve-- = '\0';
}
}
if (key && val) {
switch_stream_handle_t exec_result = { 0 };
SWITCH_STANDARD_STREAM(exec_result);
if (switch_stream_system(val, &exec_result) == 0) {
if (!zstr(exec_result.data)) {
char *tmp = (char *) exec_result.data;
tmp = &tmp[strlen(tmp)-1];
while (tmp >= (char *) exec_result.data && ( tmp[0] == ' ' || tmp[0] == '\n') ) {
tmp[0] = '\0'; /* remove trailing spaces and newlines */
tmp--;
}
switch_core_set_variable(key, exec_result.data);
}
} else {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Error while executing command: %s\n", val);
}
switch_safe_free(exec_result.data);
}
}
static void preprocess_stun_set(char *keyval)
{
char *key = keyval;
char *val = strchr(keyval, '=');
if (val) {
char *ve = val++;
while (*val && *val == ' ') {
val++;
}
*ve-- = '\0';
while (*ve && *ve == ' ') {
*ve-- = '\0';
}
}
if (key && val) {
char *external_ip = NULL;
switch_memory_pool_t *pool;
switch_core_new_memory_pool(&pool);
if (switch_stun_ip_lookup(&external_ip, val, pool) == SWITCH_STATUS_SUCCESS) {
if (!zstr(external_ip)) {
char *tmp = external_ip;
tmp = &tmp[strlen(tmp) - 1];
while (tmp >= external_ip && (tmp[0] == ' ' || tmp[0] == '\n')) {
tmp[0] = '\0'; /* remove trailing spaces and newlines */
tmp--;
}
switch_core_set_variable(key, external_ip);
}
} else {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "stun-set failed.\n");
}
switch_core_destroy_memory_pool(&pool);
}
}
static void preprocess_env_set(char *keyval)
{
char *key = keyval;
char *val = strchr(keyval, '=');
if (key && val) {
*val++ = '\0';
if (*val++ == '$') {
char *data = getenv(val);
if (data) {
switch_core_set_variable(key, data);
}
}
}
}
static int preprocess(const char *cwd, const char *file, FILE *write_fd, int rlevel);
typedef struct switch_xml_root *switch_xml_root_t;
struct switch_xml_root { /* additional data for the root tag */
struct switch_xml xml; /* is a super-struct built on top of switch_xml struct */
switch_xml_t cur; /* current xml tree insertion point */
char *m; /* original xml string */
switch_size_t len; /* length of allocated memory */
uint8_t dynamic; /* Free the original string when calling switch_xml_free */
char *u; /* UTF-8 conversion of string if original was UTF-16 */
char *s; /* start of work area */
char *e; /* end of work area */
char **ent; /* general entities (ampersand sequences) */
char ***attr; /* default attributes */
char ***pi; /* processing instructions */
short standalone; /* non-zero if <?xml standalone="yes"?> */
char err[SWITCH_XML_ERRL]; /* error string */
};
char *SWITCH_XML_NIL[] = { NULL }; /* empty, null terminated array of strings */
struct switch_xml_binding {
switch_xml_search_function_t function;
switch_xml_section_t sections;
void *user_data;
struct switch_xml_binding *next;
};
static switch_xml_binding_t *BINDINGS = NULL;
static switch_xml_t MAIN_XML_ROOT = NULL;
static switch_memory_pool_t *XML_MEMORY_POOL = NULL;
static switch_thread_rwlock_t *B_RWLOCK = NULL;
static switch_mutex_t *XML_LOCK = NULL;
static switch_mutex_t *CACHE_MUTEX = NULL;
static switch_mutex_t *REFLOCK = NULL;
static switch_mutex_t *FILE_LOCK = NULL;
SWITCH_DECLARE_NONSTD(switch_xml_t) __switch_xml_open_root(uint8_t reload, const char **err, void *user_data);
static switch_xml_open_root_function_t XML_OPEN_ROOT_FUNCTION = (switch_xml_open_root_function_t)__switch_xml_open_root;
static void *XML_OPEN_ROOT_FUNCTION_USER_DATA = NULL;
static switch_hash_t *CACHE_HASH = NULL;
static switch_hash_t *CACHE_EXPIRES_HASH = NULL;
struct xml_section_t {
const char *name;
/* switch_xml_section_t section; */
uint32_t section;
};
static struct xml_section_t SECTIONS[] = {
{"result", SWITCH_XML_SECTION_RESULT},
{"config", SWITCH_XML_SECTION_CONFIG},
{"directory", SWITCH_XML_SECTION_DIRECTORY},
{"dialplan", SWITCH_XML_SECTION_DIALPLAN},
{"languages", SWITCH_XML_SECTION_LANGUAGES},
{"chatplan", SWITCH_XML_SECTION_CHATPLAN},
{"channels", SWITCH_XML_SECTION_CHANNELS},
{NULL, 0}
};
SWITCH_DECLARE(switch_xml_section_t) switch_xml_parse_section_string(const char *str)
{
size_t x;
char buf[1024] = "";
/*switch_xml_section_t sections = SWITCH_XML_SECTION_RESULT; */
uint32_t sections = SWITCH_XML_SECTION_RESULT;
if (str) {
for (x = 0; x < strlen(str); x++) {
buf[x] = (char) tolower((int) str[x]);
}
for (x = 0;; x++) {
if (!SECTIONS[x].name) {
break;
}
if (strstr(buf, SECTIONS[x].name)) {
sections |= SECTIONS[x].section;
}
}
}
return (switch_xml_section_t) sections;
}
SWITCH_DECLARE(switch_status_t) switch_xml_unbind_search_function(switch_xml_binding_t **binding)
{
switch_xml_binding_t *ptr, *last = NULL;
switch_status_t status = SWITCH_STATUS_FALSE;
switch_thread_rwlock_wrlock(B_RWLOCK);
for (ptr = BINDINGS; ptr; ptr = ptr->next) {
if (ptr == *binding) {
if (last) {
last->next = (*binding)->next;
} else {
BINDINGS = (*binding)->next;
}
status = SWITCH_STATUS_SUCCESS;
break;
}
last = ptr;
}
switch_thread_rwlock_unlock(B_RWLOCK);
return status;
}
SWITCH_DECLARE(switch_status_t) switch_xml_unbind_search_function_ptr(switch_xml_search_function_t function)
{
switch_xml_binding_t *ptr, *last = NULL;
switch_status_t status = SWITCH_STATUS_FALSE;
switch_thread_rwlock_wrlock(B_RWLOCK);
for (ptr = BINDINGS; ptr; ptr = ptr->next) {
if (ptr->function == function) {
status = SWITCH_STATUS_SUCCESS;
if (last) {
last->next = ptr->next;
} else {
BINDINGS = ptr->next;
last = NULL;
continue;
}
}
last = ptr;
}
switch_thread_rwlock_unlock(B_RWLOCK);
return status;
}
SWITCH_DECLARE(void) switch_xml_set_binding_sections(switch_xml_binding_t *binding, switch_xml_section_t sections)
{
switch_assert(binding);
binding->sections = sections;
}
SWITCH_DECLARE(void) switch_xml_set_binding_user_data(switch_xml_binding_t *binding, void *user_data)
{
switch_assert(binding);
binding->user_data = user_data;
}
SWITCH_DECLARE(switch_xml_section_t) switch_xml_get_binding_sections(switch_xml_binding_t *binding)
{
return binding->sections;
}
SWITCH_DECLARE(void *) switch_xml_get_binding_user_data(switch_xml_binding_t *binding)
{
return binding->user_data;
}
SWITCH_DECLARE(switch_status_t) switch_xml_bind_search_function_ret(switch_xml_search_function_t function,
switch_xml_section_t sections, void *user_data, switch_xml_binding_t **ret_binding)
{
switch_xml_binding_t *binding = NULL, *ptr = NULL;
assert(function != NULL);
if (!(binding = (switch_xml_binding_t *) switch_core_alloc(XML_MEMORY_POOL, sizeof(*binding)))) {
return SWITCH_STATUS_MEMERR;
}
binding->function = function;
binding->sections = sections;
binding->user_data = user_data;
switch_thread_rwlock_wrlock(B_RWLOCK);
for (ptr = BINDINGS; ptr && ptr->next; ptr = ptr->next);
if (ptr) {
ptr->next = binding;
} else {
BINDINGS = binding;
}
if (ret_binding) {
*ret_binding = binding;
}
switch_thread_rwlock_unlock(B_RWLOCK);
return SWITCH_STATUS_SUCCESS;
}
SWITCH_DECLARE(switch_xml_t) switch_xml_find_child(switch_xml_t node, const char *childname, const char *attrname, const char *value)
{
switch_xml_t p = NULL;
if (!(childname && attrname && value)) {
return node;
}
for (p = switch_xml_child(node, childname); p; p = p->next) {
const char *aname = switch_xml_attr(p, attrname);
if (aname && !strcasecmp(aname, value)) {
break;
}
}
return p;
}
SWITCH_DECLARE(switch_xml_t) switch_xml_find_child_multi(switch_xml_t node, const char *childname,...)
{
switch_xml_t p = NULL;
const char *names[256] = { 0 };
const char *vals[256] = { 0 };
int x, i = 0;
va_list ap;
const char *attrname, *value = NULL;
va_start(ap, childname);
while (i < 255) {
if ((attrname = va_arg(ap, const char *))) {
value = va_arg(ap, const char *);
}
if (attrname && value) {
names[i] = attrname;
vals[i] = value;
} else {
break;
}
i++;
}
va_end(ap);
if (!(childname && i)) {
return node;
}
for (p = switch_xml_child(node, childname); p; p = p->next) {
for (x = 0; x < i; x++) {
if (names[x] && vals[x]) {
const char *aname = switch_xml_attr(p, names[x]);
if (aname) {
if (*vals[x] == '!') {
const char *sval = vals[x] + 1;
if (strcasecmp(aname, sval)) {
goto done;
}
} else {
if (!strcasecmp(aname, vals[x])) {
goto done;
}
}
}
}
}
}
done:
return p;
}
/* returns the first child tag with the given name or NULL if not found */
SWITCH_DECLARE(switch_xml_t) switch_xml_child(switch_xml_t xml, const char *name)
{
xml = (xml) ? xml->child : NULL;
while (xml && strcmp(name, xml->name))
xml = xml->sibling;
return xml;
}
/* returns the Nth tag with the same name in the same subsection or NULL if not found */
switch_xml_t switch_xml_idx(switch_xml_t xml, int idx)
{
for (; xml && idx; idx--)
xml = xml->next;
return xml;
}
/* returns the value of the requested tag attribute or "" if not found */
SWITCH_DECLARE(const char *) switch_xml_attr_soft(switch_xml_t xml, const char *attr)
{
const char *ret = switch_xml_attr(xml, attr);
return ret ? ret : "";
}
/* returns the value of the requested tag attribute or NULL if not found */
SWITCH_DECLARE(const char *) switch_xml_attr(switch_xml_t xml, const char *attr)
{
int i = 0, j = 1;
switch_xml_root_t root = (switch_xml_root_t) xml;
if (!xml || !xml->attr)
return NULL;
while (xml->attr[i] && attr && strcmp(attr, xml->attr[i]))
i += 2;
if (xml->attr[i])
return xml->attr[i + 1]; /* found attribute */
while (root->xml.parent)
root = (switch_xml_root_t) root->xml.parent; /* root tag */
if (!root->attr) {
return NULL;
}
for (i = 0; root->attr[i] && xml->name && strcmp(xml->name, root->attr[i][0]); i++);
if (!root->attr[i])
return NULL; /* no matching default attributes */
while (root->attr[i][j] && attr && strcmp(attr, root->attr[i][j]))
j += 3;
return (root->attr[i][j]) ? root->attr[i][j + 1] : NULL; /* found default */
}
/* same as switch_xml_get but takes an already initialized va_list */
static switch_xml_t switch_xml_vget(switch_xml_t xml, va_list ap)
{
char *name = va_arg(ap, char *);
int idx = -1;
if (name && *name) {
idx = va_arg(ap, int);
xml = switch_xml_child(xml, name);
}
return (idx < 0) ? xml : switch_xml_vget(switch_xml_idx(xml, idx), ap);
}
/* Traverses the xml tree to retrieve a specific subtag. Takes a variable
length list of tag names and indexes. The argument list must be terminated
by either an index of -1 or an empty string tag name. Example:
title = switch_xml_get(library, "shelf", 0, "book", 2, "title", -1);
This retrieves the title of the 3rd book on the 1st shelf of library.
Returns NULL if not found. */
SWITCH_DECLARE(switch_xml_t) switch_xml_get(switch_xml_t xml,...)
{
va_list ap;
switch_xml_t r;
va_start(ap, xml);
r = switch_xml_vget(xml, ap);
va_end(ap);
return r;
}
/* returns a null terminated array of processing instructions for the given target */
SWITCH_DECLARE(const char **) switch_xml_pi(switch_xml_t xml, const char *target)
{
switch_xml_root_t root = (switch_xml_root_t) xml;
int i = 0;
if (!root)
return (const char **) SWITCH_XML_NIL;
while (root->xml.parent)
root = (switch_xml_root_t) root->xml.parent; /* root tag */
if (!root || !root->pi) {
return (const char **) SWITCH_XML_NIL;
}
while (root->pi[i] && strcmp(target, root->pi[i][0]))
i++; /* find target */
return (const char **) ((root->pi[i]) ? root->pi[i] + 1 : SWITCH_XML_NIL);
}
/* set an error string and return root */
static switch_xml_t switch_xml_err(switch_xml_root_t root, char *s, const char *err, ...)
{
va_list ap;
int line = 1;
char *t, fmt[SWITCH_XML_ERRL];
if (!root || !root->s) {
return NULL;
}
for (t = root->s; t && t < s; t++)
if (*t == '\n')
line++;
switch_snprintf(fmt, SWITCH_XML_ERRL, "[error near line %d]: %s", line, err);
va_start(ap, err);
vsnprintf(root->err, SWITCH_XML_ERRL, fmt, ap);
va_end(ap);
return &root->xml;
}
/* Recursively decodes entity and character references and normalizes new lines
ent is a null terminated array of alternating entity names and values. set t
to '&' for general entity decoding, '%' for parameter entity decoding, 'c'
for cdata sections, ' ' for attribute normalization, or '*' for non-cdata
attribute normalization. Returns s, or if the decoded string is longer than
s, returns a malloced string that must be freed. */
static char *switch_xml_decode(char *s, char **ent, char t)
{
char *e, *r = s, *m = s;
unsigned long b, c, d, l;
for (; *s; s++) { /* normalize line endings */
while (*s == '\r') {
*(s++) = '\n';
if (*s == '\n')
memmove(s, (s + 1), strlen(s));
}
}
for (s = r;;) {
while (*s && *s != '&' && (*s != '%' || t != '%') && !isspace((unsigned char) (*s)))
s++;
if (!*s)
break;
else if (t != 'c' && !strncmp(s, "&#", 2)) { /* character reference */
char *code = s + 2;
int base = 10;
if (*code == 'x') {
code++;
base = 16;
}
if (!isxdigit((int)*code)) { /* "&# 1;" and "&#-1;" are invalid */
s++;
continue;
}
c = strtoul(code, &e, base);
if (!c || *e != ';') {
s++;
continue;
}
/* not a character ref */
if (c < 0x80)
*(s++) = (char) c; /* US-ASCII subset */
else if (c > 0x7FFFFFFF) { /* out of UTF-8 range */
s++;
continue;
} else { /* multi-byte UTF-8 sequence */
for (b = 0, d = c; d; d /= 2)
b++; /* number of bits in c */
b = (b - 2) / 5; /* number of bytes in payload */
assert(b < 7); /* because c <= 0x7FFFFFFF */
*(s++) = (char) ((0xFF << (7 - b)) | (c >> (6 * b))); /* head */
while (b)
*(s++) = (char) (0x80 | ((c >> (6 * --b)) & 0x3F)); /* payload */
}
memmove(s, strchr(s, ';') + 1, strlen(strchr(s, ';')));
} else if ((*s == '&' && (t == '&' || t == ' ' || t == '*')) || (*s == '%' && t == '%')) { /* entity reference */
for (b = 0; ent[b] && strncmp(s + 1, ent[b], strlen(ent[b])); b += 2); /* find entity in entity list */
if (ent[b++]) { /* found a match */
if ((c = (unsigned long) strlen(ent[b])) - 1 > (e = strchr(s, ';')) - s) {
l = (d = (unsigned long) (s - r)) + c + (unsigned long) strlen(e); /* new length */
if (l) {
if (r == m) {
char *tmp = (char *) switch_must_malloc(l);
r = strcpy(tmp, r);
} else {
r = (char *) switch_must_realloc(r, l);
}
}
e = strchr((s = r + d), ';'); /* fix up pointers */
}
memmove(s + c, e + 1, strlen(e)); /* shift rest of string */
strncpy(s, ent[b], c); /* copy in replacement text */
} else
s++; /* not a known entity */
} else if ((t == ' ' || t == '*') && isspace((int) (*s)))
*(s++) = ' ';
else
s++; /* no decoding needed */
}
if (t == '*') { /* normalize spaces for non-cdata attributes */
for (s = r; *s; s++) {
if ((l = (unsigned long) strspn(s, " ")))
memmove(s, s + l, strlen(s + l) + 1);
while (*s && *s != ' ')
s++;
}
if (--s >= r && *s == ' ')
*s = '\0'; /* trim any trailing space */
}
return r;
}
/* called when parser finds start of new tag */
static void switch_xml_open_tag(switch_xml_root_t root, char *name, char **attr)
{
switch_xml_t xml;
if (!root || !root->cur) {
return;
}
xml = root->cur;
if (xml->name)
xml = switch_xml_add_child(xml, name, strlen(xml->txt));
else
xml->name = name; /* first open tag */
xml->attr = attr;
root->cur = xml; /* update tag insertion point */
}
/* called when parser finds character content between open and closing tag */
static void switch_xml_char_content(switch_xml_root_t root, char *s, switch_size_t len, char t)
{
switch_xml_t xml;
char *m = s;
switch_size_t l;
if (!root || !root->cur) {
return;
}
xml = root->cur;
if (!xml || !xml->name || !len)
return; /* sanity check */
s[len] = '\0'; /* null terminate text (calling functions anticipate this) */
len = strlen(s = switch_xml_decode(s, root->ent, t)) + 1;
if (!*(xml->txt))
xml->txt = s; /* initial character content */
else { /* allocate our own memory and make a copy */
if ((xml->flags & SWITCH_XML_TXTM)) { /* allocate some space */
xml->txt = (char *) switch_must_realloc(xml->txt, (l = strlen(xml->txt)) + len);
} else {
char *tmp = (char *) switch_must_malloc((l = strlen(xml->txt)) + len);
xml->txt = strcpy(tmp, xml->txt);
}
strcpy(xml->txt + l, s); /* add new char content */
if (s != m)
free(s); /* free s if it was malloced by switch_xml_decode() */
}
if (xml->txt != m)
switch_xml_set_flag(xml, SWITCH_XML_TXTM);
}
/* called when parser finds closing tag */
static switch_xml_t switch_xml_close_tag(switch_xml_root_t root, char *name, char *s)
{
if (!root || !root->cur || !root->cur->name || strcmp(name, root->cur->name))
return switch_xml_err(root, s, "unexpected closing tag </%s>", name);
root->cur = root->cur->parent;
return NULL;
}
/* checks for circular entity references, returns non-zero if no circular
references are found, zero otherwise */
static int switch_xml_ent_ok(char *name, char *s, char **ent)
{
int i;
for (;; s++) {
while (*s && *s != '&')
s++; /* find next entity reference */
if (!*s)
return 1;
if (!strncmp(s + 1, name, strlen(name)))
return 0; /* circular ref. */
for (i = 0; ent[i] && strncmp(ent[i], s + 1, strlen(ent[i])); i += 2);
if (ent[i] && !switch_xml_ent_ok(name, ent[i + 1], ent))
return 0;
}
}
/* called when the parser finds a processing instruction */
static void switch_xml_proc_inst(switch_xml_root_t root, char *s, switch_size_t len)
{
int i = 0, j = 1;
char *target = s;
char **sstmp;
char *stmp;
s[len] = '\0'; /* null terminate instruction */
if (*(s += strcspn(s, SWITCH_XML_WS))) {
*s = '\0'; /* null terminate target */
s += strspn(s + 1, SWITCH_XML_WS) + 1; /* skip whitespace after target */
}
if (!root)
return;
if (!strcmp(target, "xml")) { /* <?xml ... ?> */
if ((s = strstr(s, "standalone")) && !strncmp(s + strspn(s + 10, SWITCH_XML_WS "='\"") + 10, "yes", 3))
root->standalone = 1;
return;
}
if (!root->pi || !root->pi[0]) {
root->pi = (char ***) switch_must_malloc(sizeof(char **));
*(root->pi) = NULL; /* first pi */
}
while (root->pi[i] && strcmp(target, root->pi[i][0]))
i++; /* find target */
if (!root->pi[i]) { /* new target */
char ***ssstmp = (char ***) switch_must_realloc(root->pi, sizeof(char **) * (i + 2));
root->pi = ssstmp;
if (!root->pi)
return;
root->pi[i] = (char **) switch_must_malloc(sizeof(char *) * 3);
root->pi[i][0] = target;
root->pi[i][1] = (char *) (root->pi[i + 1] = NULL); /* terminate pi list */
root->pi[i][2] = switch_must_strdup(""); /* empty document position list */
}
while (root->pi[i][j])
j++; /* find end of instruction list for this target */
sstmp = (char **) switch_must_realloc(root->pi[i], sizeof(char *) * (j + 3));
root->pi[i] = sstmp;
stmp = (char *) switch_must_realloc(root->pi[i][j + 1], j + 1);
root->pi[i][j + 2] = stmp;
strcpy(root->pi[i][j + 2] + j - 1, (root->xml.name) ? ">" : "<");
root->pi[i][j + 1] = NULL; /* null terminate pi list for this target */
root->pi[i][j] = s; /* set instruction */
}
/* called when the parser finds an internal doctype subset */
static short switch_xml_internal_dtd(switch_xml_root_t root, char *s, switch_size_t len)
{
char q, *c, *t, *n = NULL, *v, **ent, **pe;
int i, j;
char **sstmp;
pe = (char **) memcpy(switch_must_malloc(sizeof(SWITCH_XML_NIL)), SWITCH_XML_NIL, sizeof(SWITCH_XML_NIL));
for (s[len] = '\0'; s;) {
while (*s && *s != '<' && *s != '%')
s++; /* find next declaration */
if (!*s)
break;
else if (!strncmp(s, "<!ENTITY", 8)) { /* parse entity definitions */
c = s += strspn(s + 8, SWITCH_XML_WS) + 8; /* skip white space separator */
n = s + strspn(s, SWITCH_XML_WS "%"); /* find name */
*(s = n + strcspn(n, SWITCH_XML_WS)) = ';'; /* append ; to name */
v = s + strspn(s + 1, SWITCH_XML_WS) + 1; /* find value */
if ((q = *(v++)) != '"' && q != '\'') { /* skip externals */
s = strchr(s, '>');
continue;
}
for (i = 0, ent = (*c == '%') ? pe : root->ent; ent[i]; i++);
sstmp = (char **) switch_must_realloc(ent, (i + 3) * sizeof(char *)); /* space for next ent */
ent = sstmp;
if (*c == '%')
pe = ent;
else
root->ent = ent;
*(++s) = '\0'; /* null terminate name */
if ((s = strchr(v, q)))
*(s++) = '\0'; /* null terminate value */
ent[i + 1] = switch_xml_decode(v, pe, '%'); /* set value */
ent[i + 2] = NULL; /* null terminate entity list */
if (!switch_xml_ent_ok(n, ent[i + 1], ent)) { /* circular reference */
if (ent[i + 1] != v)
free(ent[i + 1]);
switch_xml_err(root, v, "circular entity declaration &%s", n);
break;
} else
ent[i] = n; /* set entity name */
} else if (!strncmp(s, "<!ATTLIST", 9)) { /* parse default attributes */
t = s + strspn(s + 9, SWITCH_XML_WS) + 9; /* skip whitespace separator */
if (!*t) {
switch_xml_err(root, t, "unclosed <!ATTLIST");
break;
}
if (*(s = t + strcspn(t, SWITCH_XML_WS ">")) == '>')
continue;
else
*s = '\0'; /* null terminate tag name */
for (i = 0; root->attr[i] && strcmp(n, root->attr[i][0]); i++);
//while (*(n = ++s + strspn(s, SWITCH_XML_WS)) && *n != '>') {
// gcc 4.4 you are a creep
for (;;) {
s++;
if (!(*(n = s + strspn(s, SWITCH_XML_WS)) && *n != '>')) {
break;
}
if (*(s = n + strcspn(n, SWITCH_XML_WS)))
*s = '\0'; /* attr name */
else {
switch_xml_err(root, t, "malformed <!ATTLIST");
break;
}
s += strspn(s + 1, SWITCH_XML_WS) + 1; /* find next token */
c = (strncmp(s, "CDATA", 5)) ? (char *) "*" : (char *) " "; /* is it cdata? */
if (!strncmp(s, "NOTATION", 8))
s += strspn(s + 8, SWITCH_XML_WS) + 8;
s = (*s == '(') ? strchr(s, ')') : s + strcspn(s, SWITCH_XML_WS);
if (!s) {
switch_xml_err(root, t, "malformed <!ATTLIST");
break;
}
s += strspn(s, SWITCH_XML_WS ")"); /* skip white space separator */
if (!strncmp(s, "#FIXED", 6))
s += strspn(s + 6, SWITCH_XML_WS) + 6;
if (*s == '#') { /* no default value */
s += strcspn(s, SWITCH_XML_WS ">") - 1;
if (*c == ' ')
continue; /* cdata is default, nothing to do */
v = NULL;
} else if ((*s == '"' || *s == '\'') && /* default value */
(s = strchr(v = s + 1, *s)))
*s = '\0';
else {
switch_xml_err(root, t, "malformed <!ATTLIST");
break;
}
if (!root->attr[i]) { /* new tag name */
root->attr = (!i) ? (char ***) switch_must_malloc(2 * sizeof(char **))
: (char ***) switch_must_realloc(root->attr, (i + 2) * sizeof(char **));
root->attr[i] = (char **) switch_must_malloc(2 * sizeof(char *));
root->attr[i][0] = t; /* set tag name */
root->attr[i][1] = (char *) (root->attr[i + 1] = NULL);
}
for (j = 1; root->attr[i][j]; j += 3); /* find end of list */
sstmp = (char **) switch_must_realloc(root->attr[i], (j + 4) * sizeof(char *));
root->attr[i] = sstmp;
root->attr[i][j + 3] = NULL; /* null terminate list */
root->attr[i][j + 2] = c; /* is it cdata? */
root->attr[i][j + 1] = (v) ? switch_xml_decode(v, root->ent, *c) : NULL;
root->attr[i][j] = n; /* attribute name */
}
} else if (!strncmp(s, "<!--", 4))
s = strstr(s + 4, "-->"); /* comments */
else if (!strncmp(s, "<?", 2)) { /* processing instructions */
if ((s = strstr(c = s + 2, "?>")))
switch_xml_proc_inst(root, c, s++ - c);
} else if (*s == '<')
s = strchr(s, '>'); /* skip other declarations */
else if (*(s++) == '%' && !root->standalone)
break;
}
free(pe);
return !*root->err;
}
/* Converts a UTF-16 string to UTF-8. Returns a new string that must be freed
or NULL if no conversion was needed. */
static char *switch_xml_str2utf8(char **s, switch_size_t *len)
{
char *u;
switch_size_t l = 0, sl, max = *len;
long c, d;
int b, be = (**s == '\xFE') ? 1 : (**s == '\xFF') ? 0 : -1;
if (be == -1)
return NULL; /* not UTF-16 */
u = (char *) switch_must_malloc(max);
for (sl = 2; sl < *len - 1; sl += 2) {
c = (be) ? (((*s)[sl] & 0xFF) << 8) | ((*s)[sl + 1] & 0xFF) /* UTF-16BE */
: (((*s)[sl + 1] & 0xFF) << 8) | ((*s)[sl] & 0xFF); /* UTF-16LE */
if (c >= 0xD800 && c <= 0xDFFF && (sl += 2) < *len - 1) { /* high-half */
d = (be) ? (((*s)[sl] & 0xFF) << 8) | ((*s)[sl + 1] & 0xFF)
: (((*s)[sl + 1] & 0xFF) << 8) | ((*s)[sl] & 0xFF);
c = (((c & 0x3FF) << 10) | (d & 0x3FF)) + 0x10000;
}
while (l + 6 > max) {
char *tmp;
tmp = (char *) switch_must_realloc(u, max += SWITCH_XML_BUFSIZE);
u = tmp;
}
if (c < 0x80)
u[l++] = (char) c; /* US-ASCII subset */
else { /* multi-byte UTF-8 sequence */
for (b = 0, d = c; d; d /= 2)
b++; /* bits in c */
b = (b - 2) / 5; /* bytes in payload */
u[l++] = (char) ((0xFF << (7 - b)) | (c >> (6 * b))); /* head */
while (b)
u[l++] = (char) (0x80 | ((c >> (6 * --b)) & 0x3F)); /* payload */
}
}
return *s = (char *) switch_must_realloc(u, *len = l);
}
/* frees a tag attribute list */
static void switch_xml_free_attr(char **attr)
{
int i = 0;