source: wpa_supplicant/vendor/current/src/utils/xml_libxml2.c@ 793

Last change on this file since 793 was 793, checked in by andi.b@gmx.net, 11 years ago

wpa_supplicant: initial import of wpa_supplicant2.2
  • Property svn:eol-style set to native
File size: 9.0 KB
Line 
1/*
2 * XML wrapper for libxml2
3 * Copyright (c) 2012-2013, Qualcomm Atheros, Inc.
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 */
8
9#include "includes.h"
10#define LIBXML_VALID_ENABLED
11#include <libxml/tree.h>
12#include <libxml/xmlschemastypes.h>
13
14#include "common.h"
15#include "base64.h"
16#include "xml-utils.h"
17
18
19struct xml_node_ctx {
20 void *ctx;
21};
22
23
24struct str_buf {
25 char *buf;
26 size_t len;
27};
28
29#define MAX_STR 1000
30
31static void add_str(void *ctx_ptr, const char *fmt, ...)
32{
33 struct str_buf *str = ctx_ptr;
34 va_list ap;
35 char *n;
36 int len;
37
38 n = os_realloc(str->buf, str->len + MAX_STR + 2);
39 if (n == NULL)
40 return;
41 str->buf = n;
42
43 va_start(ap, fmt);
44 len = vsnprintf(str->buf + str->len, MAX_STR, fmt, ap);
45 va_end(ap);
46 if (len >= MAX_STR)
47 len = MAX_STR - 1;
48 str->len += len;
49 str->buf[str->len] = '\0';
50}
51
52
53int xml_validate(struct xml_node_ctx *ctx, xml_node_t *node,
54 const char *xml_schema_fname, char **ret_err)
55{
56 xmlDocPtr doc;
57 xmlNodePtr n;
58 xmlSchemaParserCtxtPtr pctx;
59 xmlSchemaValidCtxtPtr vctx;
60 xmlSchemaPtr schema;
61 int ret;
62 struct str_buf errors;
63
64 if (ret_err)
65 *ret_err = NULL;
66
67 doc = xmlNewDoc((xmlChar *) "1.0");
68 if (doc == NULL)
69 return -1;
70 n = xmlDocCopyNode((xmlNodePtr) node, doc, 1);
71 if (n == NULL) {
72 xmlFreeDoc(doc);
73 return -1;
74 }
75 xmlDocSetRootElement(doc, n);
76
77 os_memset(&errors, 0, sizeof(errors));
78
79 pctx = xmlSchemaNewParserCtxt(xml_schema_fname);
80 xmlSchemaSetParserErrors(pctx, (xmlSchemaValidityErrorFunc) add_str,
81 (xmlSchemaValidityWarningFunc) add_str,
82 &errors);
83 schema = xmlSchemaParse(pctx);
84 xmlSchemaFreeParserCtxt(pctx);
85
86 vctx = xmlSchemaNewValidCtxt(schema);
87 xmlSchemaSetValidErrors(vctx, (xmlSchemaValidityErrorFunc) add_str,
88 (xmlSchemaValidityWarningFunc) add_str,
89 &errors);
90
91 ret = xmlSchemaValidateDoc(vctx, doc);
92 xmlSchemaFreeValidCtxt(vctx);
93 xmlFreeDoc(doc);
94 xmlSchemaFree(schema);
95
96 if (ret == 0) {
97 os_free(errors.buf);
98 return 0;
99 } else if (ret > 0) {
100 if (ret_err)
101 *ret_err = errors.buf;
102 else
103 os_free(errors.buf);
104 return -1;
105 } else {
106 if (ret_err)
107 *ret_err = errors.buf;
108 else
109 os_free(errors.buf);
110 return -1;
111 }
112}
113
114
115int xml_validate_dtd(struct xml_node_ctx *ctx, xml_node_t *node,
116 const char *dtd_fname, char **ret_err)
117{
118 xmlDocPtr doc;
119 xmlNodePtr n;
120 xmlValidCtxt vctx;
121 xmlDtdPtr dtd;
122 int ret;
123 struct str_buf errors;
124
125 if (ret_err)
126 *ret_err = NULL;
127
128 doc = xmlNewDoc((xmlChar *) "1.0");
129 if (doc == NULL)
130 return -1;
131 n = xmlDocCopyNode((xmlNodePtr) node, doc, 1);
132 if (n == NULL) {
133 xmlFreeDoc(doc);
134 return -1;
135 }
136 xmlDocSetRootElement(doc, n);
137
138 os_memset(&errors, 0, sizeof(errors));
139
140 dtd = xmlParseDTD(NULL, (const xmlChar *) dtd_fname);
141 if (dtd == NULL) {
142 xmlFreeDoc(doc);
143 return -1;
144 }
145
146 os_memset(&vctx, 0, sizeof(vctx));
147 vctx.userData = &errors;
148 vctx.error = add_str;
149 vctx.warning = add_str;
150 ret = xmlValidateDtd(&vctx, doc, dtd);
151 xmlFreeDoc(doc);
152 xmlFreeDtd(dtd);
153
154 if (ret == 1) {
155 os_free(errors.buf);
156 return 0;
157 } else {
158 if (ret_err)
159 *ret_err = errors.buf;
160 else
161 os_free(errors.buf);
162 return -1;
163 }
164}
165
166
167void xml_node_free(struct xml_node_ctx *ctx, xml_node_t *node)
168{
169 xmlFreeNode((xmlNodePtr) node);
170}
171
172
173xml_node_t * xml_node_get_parent(struct xml_node_ctx *ctx, xml_node_t *node)
174{
175 return (xml_node_t *) ((xmlNodePtr) node)->parent;
176}
177
178
179xml_node_t * xml_node_from_buf(struct xml_node_ctx *ctx, const char *buf)
180{
181 xmlDocPtr doc;
182 xmlNodePtr node;
183
184 doc = xmlParseMemory(buf, strlen(buf));
185 if (doc == NULL)
186 return NULL;
187 node = xmlDocGetRootElement(doc);
188 node = xmlCopyNode(node, 1);
189 xmlFreeDoc(doc);
190
191 return (xml_node_t *) node;
192}
193
194
195const char * xml_node_get_localname(struct xml_node_ctx *ctx,
196 xml_node_t *node)
197{
198 return (const char *) ((xmlNodePtr) node)->name;
199}
200
201
202char * xml_node_to_str(struct xml_node_ctx *ctx, xml_node_t *node)
203{
204 xmlChar *buf;
205 int bufsiz;
206 char *ret, *pos;
207 xmlNodePtr n = (xmlNodePtr) node;
208 xmlDocPtr doc;
209
210 doc = xmlNewDoc((xmlChar *) "1.0");
211 n = xmlDocCopyNode(n, doc, 1);
212 xmlDocSetRootElement(doc, n);
213 xmlDocDumpFormatMemory(doc, &buf, &bufsiz, 0);
214 xmlFreeDoc(doc);
215 pos = (char *) buf;
216 if (strncmp(pos, "<?xml", 5) == 0) {
217 pos = strchr(pos, '>');
218 if (pos)
219 pos++;
220 while (pos && (*pos == '\r' || *pos == '\n'))
221 pos++;
222 }
223 if (pos)
224 ret = os_strdup(pos);
225 else
226 ret = NULL;
227 xmlFree(buf);
228
229 if (ret) {
230 pos = ret;
231 if (pos[0]) {
232 while (pos[1])
233 pos++;
234 }
235 while (pos >= ret && *pos == '\n')
236 *pos-- = '\0';
237 }
238
239 return ret;
240}
241
242
243void xml_node_detach(struct xml_node_ctx *ctx, xml_node_t *node)
244{
245 xmlUnlinkNode((xmlNodePtr) node);
246}
247
248
249void xml_node_add_child(struct xml_node_ctx *ctx, xml_node_t *parent,
250 xml_node_t *child)
251{
252 xmlAddChild((xmlNodePtr) parent, (xmlNodePtr) child);
253}
254
255
256xml_node_t * xml_node_create_root(struct xml_node_ctx *ctx, const char *ns_uri,
257 const char *ns_prefix,
258 xml_namespace_t **ret_ns, const char *name)
259{
260 xmlNodePtr node;
261 xmlNsPtr ns = NULL;
262
263 node = xmlNewNode(NULL, (const xmlChar *) name);
264 if (node == NULL)
265 return NULL;
266 if (ns_uri) {
267 ns = xmlNewNs(node, (const xmlChar *) ns_uri,
268 (const xmlChar *) ns_prefix);
269 xmlSetNs(node, ns);
270 }
271
272 if (ret_ns)
273 *ret_ns = (xml_namespace_t *) ns;
274
275 return (xml_node_t *) node;
276}
277
278
279xml_node_t * xml_node_create(struct xml_node_ctx *ctx, xml_node_t *parent,
280 xml_namespace_t *ns, const char *name)
281{
282 xmlNodePtr node;
283 node = xmlNewChild((xmlNodePtr) parent, (xmlNsPtr) ns,
284 (const xmlChar *) name, NULL);
285 return (xml_node_t *) node;
286}
287
288
289xml_node_t * xml_node_create_text(struct xml_node_ctx *ctx,
290 xml_node_t *parent, xml_namespace_t *ns,
291 const char *name, const char *value)
292{
293 xmlNodePtr node;
294 node = xmlNewTextChild((xmlNodePtr) parent, (xmlNsPtr) ns,
295 (const xmlChar *) name, (const xmlChar *) value);
296 return (xml_node_t *) node;
297}
298
299
300xml_node_t * xml_node_create_text_ns(struct xml_node_ctx *ctx,
301 xml_node_t *parent, const char *ns_uri,
302 const char *name, const char *value)
303{
304 xmlNodePtr node;
305 xmlNsPtr ns;
306
307 node = xmlNewTextChild((xmlNodePtr) parent, NULL,
308 (const xmlChar *) name, (const xmlChar *) value);
309 ns = xmlNewNs(node, (const xmlChar *) ns_uri, NULL);
310 xmlSetNs(node, ns);
311 return (xml_node_t *) node;
312}
313
314
315void xml_node_set_text(struct xml_node_ctx *ctx, xml_node_t *node,
316 const char *value)
317{
318 /* TODO: escape XML special chars in value */
319 xmlNodeSetContent((xmlNodePtr) node, (xmlChar *) value);
320}
321
322
323int xml_node_add_attr(struct xml_node_ctx *ctx, xml_node_t *node,
324 xml_namespace_t *ns, const char *name, const char *value)
325{
326 xmlAttrPtr attr;
327
328 if (ns) {
329 attr = xmlNewNsProp((xmlNodePtr) node, (xmlNsPtr) ns,
330 (const xmlChar *) name,
331 (const xmlChar *) value);
332 } else {
333 attr = xmlNewProp((xmlNodePtr) node, (const xmlChar *) name,
334 (const xmlChar *) value);
335 }
336
337 return attr ? 0 : -1;
338}
339
340
341char * xml_node_get_attr_value(struct xml_node_ctx *ctx, xml_node_t *node,
342 char *name)
343{
344 return (char *) xmlGetNoNsProp((xmlNodePtr) node,
345 (const xmlChar *) name);
346}
347
348
349char * xml_node_get_attr_value_ns(struct xml_node_ctx *ctx, xml_node_t *node,
350 const char *ns_uri, char *name)
351{
352 return (char *) xmlGetNsProp((xmlNodePtr) node, (const xmlChar *) name,
353 (const xmlChar *) ns_uri);
354}
355
356
357void xml_node_get_attr_value_free(struct xml_node_ctx *ctx, char *val)
358{
359 if (val)
360 xmlFree((xmlChar *) val);
361}
362
363
364xml_node_t * xml_node_first_child(struct xml_node_ctx *ctx,
365 xml_node_t *parent)
366{
367 return (xml_node_t *) ((xmlNodePtr) parent)->children;
368}
369
370
371xml_node_t * xml_node_next_sibling(struct xml_node_ctx *ctx,
372 xml_node_t *node)
373{
374 return (xml_node_t *) ((xmlNodePtr) node)->next;
375}
376
377
378int xml_node_is_element(struct xml_node_ctx *ctx, xml_node_t *node)
379{
380 return ((xmlNodePtr) node)->type == XML_ELEMENT_NODE;
381}
382
383
384char * xml_node_get_text(struct xml_node_ctx *ctx, xml_node_t *node)
385{
386 if (xmlChildElementCount((xmlNodePtr) node) > 0)
387 return NULL;
388 return (char *) xmlNodeGetContent((xmlNodePtr) node);
389}
390
391
392void xml_node_get_text_free(struct xml_node_ctx *ctx, char *val)
393{
394 if (val)
395 xmlFree((xmlChar *) val);
396}
397
398
399char * xml_node_get_base64_text(struct xml_node_ctx *ctx, xml_node_t *node,
400 int *ret_len)
401{
402 char *txt;
403 unsigned char *ret;
404 size_t len;
405
406 txt = xml_node_get_text(ctx, node);
407 if (txt == NULL)
408 return NULL;
409
410 ret = base64_decode((unsigned char *) txt, strlen(txt), &len);
411 if (ret_len)
412 *ret_len = len;
413 xml_node_get_text_free(ctx, txt);
414 if (ret == NULL)
415 return NULL;
416 txt = os_malloc(len + 1);
417 if (txt == NULL) {
418 os_free(ret);
419 return NULL;
420 }
421 os_memcpy(txt, ret, len);
422 txt[len] = '\0';
423 return txt;
424}
425
426
427xml_node_t * xml_node_copy(struct xml_node_ctx *ctx, xml_node_t *node)
428{
429 if (node == NULL)
430 return NULL;
431 return (xml_node_t *) xmlCopyNode((xmlNodePtr) node, 1);
432}
433
434
435struct xml_node_ctx * xml_node_init_ctx(void *upper_ctx,
436 const void *env)
437{
438 struct xml_node_ctx *xctx;
439
440 xctx = os_zalloc(sizeof(*xctx));
441 if (xctx == NULL)
442 return NULL;
443 xctx->ctx = upper_ctx;
444
445 LIBXML_TEST_VERSION
446
447 return xctx;
448}
449
450
451void xml_node_deinit_ctx(struct xml_node_ctx *ctx)
452{
453 xmlSchemaCleanupTypes();
454 xmlCleanupParser();
455 xmlMemoryDump();
456 os_free(ctx);
457}
Note: See TracBrowser for help on using the repository browser.