1 3c1cf9d0 2021-01-11 op /*
  2 3c1cf9d0 2021-01-11 op  * Copyright (c) 2020 Omar Polo <op@omarpolo.com>
  3 3c1cf9d0 2021-01-11 op  *
  4 3c1cf9d0 2021-01-11 op  * Permission to use, copy, modify, and distribute this software for any
  5 3c1cf9d0 2021-01-11 op  * purpose with or without fee is hereby granted, provided that the above
  6 3c1cf9d0 2021-01-11 op  * copyright notice and this permission notice appear in all copies.
  7 3c1cf9d0 2021-01-11 op  *
  8 3c1cf9d0 2021-01-11 op  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  9 3c1cf9d0 2021-01-11 op  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 10 3c1cf9d0 2021-01-11 op  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 11 3c1cf9d0 2021-01-11 op  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 12 3c1cf9d0 2021-01-11 op  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 13 3c1cf9d0 2021-01-11 op  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 14 3c1cf9d0 2021-01-11 op  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 15 3c1cf9d0 2021-01-11 op  */
 16 52418c8d 2021-02-12 op 
 17 52418c8d 2021-02-12 op #include "gmid.h"
 18 3c1cf9d0 2021-01-11 op 
 19 3c1cf9d0 2021-01-11 op #include <ctype.h>
 20 3c1cf9d0 2021-01-11 op #include <string.h>
 21 3c1cf9d0 2021-01-11 op 
 22 3c1cf9d0 2021-01-11 op static inline int
 23 3c1cf9d0 2021-01-11 op unreserved(int p)
 24 3c1cf9d0 2021-01-11 op {
 25 3c1cf9d0 2021-01-11 op 	return isalnum(p)
 26 3c1cf9d0 2021-01-11 op 		|| p == '-'
 27 3c1cf9d0 2021-01-11 op 		|| p == '.'
 28 3c1cf9d0 2021-01-11 op 		|| p == '_'
 29 3c1cf9d0 2021-01-11 op 		|| p == '~';
 30 3c1cf9d0 2021-01-11 op }
 31 3c1cf9d0 2021-01-11 op 
 32 3c1cf9d0 2021-01-11 op static inline int
 33 3c1cf9d0 2021-01-11 op sub_delimiters(int p)
 34 3c1cf9d0 2021-01-11 op {
 35 3c1cf9d0 2021-01-11 op 	return p == '!'
 36 3c1cf9d0 2021-01-11 op 		|| p == '$'
 37 3c1cf9d0 2021-01-11 op 		|| p == '&'
 38 3c1cf9d0 2021-01-11 op 		|| p == '\''
 39 3c1cf9d0 2021-01-11 op 		|| p == '('
 40 3c1cf9d0 2021-01-11 op 		|| p == ')'
 41 3c1cf9d0 2021-01-11 op 		|| p == '*'
 42 3c1cf9d0 2021-01-11 op 		|| p == '+'
 43 3c1cf9d0 2021-01-11 op 		|| p == ','
 44 3c1cf9d0 2021-01-11 op 		|| p == ';'
 45 3c1cf9d0 2021-01-11 op 		|| p == '=';
 46 8404ec30 2021-02-05 op }
 47 8404ec30 2021-02-05 op 
 48 8404ec30 2021-02-05 op static int
 49 8404ec30 2021-02-05 op valid_pct_enc_string(char *s)
 50 8404ec30 2021-02-05 op {
 51 8404ec30 2021-02-05 op 	if (*s != '%')
 52 8404ec30 2021-02-05 op 		return 1;
 53 8404ec30 2021-02-05 op 
 54 8404ec30 2021-02-05 op 	if (!isxdigit(s[1]) || !isxdigit(s[2]))
 55 8404ec30 2021-02-05 op 		return 0;
 56 8404ec30 2021-02-05 op 
 57 8404ec30 2021-02-05 op 	if (s[1] == '0' && s[2] == '0')
 58 8404ec30 2021-02-05 op 		return 0;
 59 8404ec30 2021-02-05 op 
 60 8404ec30 2021-02-05 op 	return 1;
 61 8404ec30 2021-02-05 op }
 62 8404ec30 2021-02-05 op 
 63 8404ec30 2021-02-05 op static int
 64 8404ec30 2021-02-05 op valid_pct_encoded(struct parser *p)
 65 8404ec30 2021-02-05 op {
 66 8404ec30 2021-02-05 op 	if (p->iri[0] != '%')
 67 8404ec30 2021-02-05 op 		return 0;
 68 8404ec30 2021-02-05 op 
 69 8404ec30 2021-02-05 op 	if (!valid_pct_enc_string(p->iri)) {
 70 8404ec30 2021-02-05 op 		p->err = "illegal percent-encoding";
 71 8404ec30 2021-02-05 op 		return 0;
 72 8404ec30 2021-02-05 op 	}
 73 8404ec30 2021-02-05 op 
 74 8404ec30 2021-02-05 op 	p->iri += 2;
 75 8404ec30 2021-02-05 op 	return 1;
 76 3c1cf9d0 2021-01-11 op }
 77 3c1cf9d0 2021-01-11 op 
 78 9f006a21 2021-02-07 op static void
 79 9f006a21 2021-02-07 op pct_decode(char *s)
 80 9f006a21 2021-02-07 op {
 81 9f006a21 2021-02-07 op 	sscanf(s+1, "%2hhx", s);
 82 9f006a21 2021-02-07 op 	memmove(s+1, s+3, strlen(s+3)+1);
 83 9f006a21 2021-02-07 op }
 84 9f006a21 2021-02-07 op 
 85 3c1cf9d0 2021-01-11 op static int
 86 3c1cf9d0 2021-01-11 op parse_pct_encoded(struct parser *p)
 87 3c1cf9d0 2021-01-11 op {
 88 9a672b37 2021-01-28 op 	if (p->iri[0] != '%')
 89 3c1cf9d0 2021-01-11 op 		return 0;
 90 3c1cf9d0 2021-01-11 op 
 91 8404ec30 2021-02-05 op 	if (!valid_pct_enc_string(p->iri)) {
 92 3c1cf9d0 2021-01-11 op 		p->err = "illegal percent-encoding";
 93 3c1cf9d0 2021-01-11 op 		return 0;
 94 3c1cf9d0 2021-01-11 op 	}
 95 3c1cf9d0 2021-01-11 op 
 96 9f006a21 2021-02-07 op 	pct_decode(p->iri);
 97 3c1cf9d0 2021-01-11 op 	if (*p->iri == '\0') {
 98 3c1cf9d0 2021-01-11 op 		p->err = "illegal percent-encoding";
 99 3c1cf9d0 2021-01-11 op 		return 0;
100 3c1cf9d0 2021-01-11 op 	}
101 3c1cf9d0 2021-01-11 op 
102 3c1cf9d0 2021-01-11 op 	return 1;
103 3c1cf9d0 2021-01-11 op }
104 3c1cf9d0 2021-01-11 op 
105 3c1cf9d0 2021-01-11 op /* ALPHA *( ALPHA / DIGIT / "+" / "-" / "." ) "://" */
106 3c1cf9d0 2021-01-11 op static int
107 3c1cf9d0 2021-01-11 op parse_scheme(struct parser *p)
108 3c1cf9d0 2021-01-11 op {
109 3c1cf9d0 2021-01-11 op 	p->parsed->schema = p->iri;
110 3c1cf9d0 2021-01-11 op 
111 3c1cf9d0 2021-01-11 op 	if (!isalpha(*p->iri)) {
112 3c1cf9d0 2021-01-11 op 		p->err = "illegal character in scheme";
113 3c1cf9d0 2021-01-11 op 		return 0;
114 3c1cf9d0 2021-01-11 op 	}
115 3c1cf9d0 2021-01-11 op 
116 de428fff 2021-01-13 op 	do {
117 de428fff 2021-01-13 op 		/* normalize the scheme (i.e. lowercase it)
118 de428fff 2021-01-13 op 		 *
119 de428fff 2021-01-13 op 		 * XXX: since we cannot have good things, tolower
120 881dc835 2021-01-16 op 		 * behaviour depends on the LC_CTYPE locale.  The good
121 881dc835 2021-01-16 op 		 * news is that we're sure p->iri points to something
122 881dc835 2021-01-16 op 		 * that's in the ASCII range, so tolower can't
123 881dc835 2021-01-16 op 		 * mis-behave on some systems due to the locale. */
124 de428fff 2021-01-13 op 		*p->iri = tolower(*p->iri);
125 de428fff 2021-01-13 op 		p->iri++;
126 de428fff 2021-01-13 op 	} while (isalnum(*p->iri)
127 3c1cf9d0 2021-01-11 op 	    || *p->iri == '+'
128 3c1cf9d0 2021-01-11 op 	    || *p->iri == '-'
129 de428fff 2021-01-13 op 	    || *p->iri == '.');
130 3c1cf9d0 2021-01-11 op 
131 3c1cf9d0 2021-01-11 op 	if (*p->iri != ':') {
132 3c1cf9d0 2021-01-11 op 		p->err = "illegal character in scheme";
133 3c1cf9d0 2021-01-11 op 		return 0;
134 3c1cf9d0 2021-01-11 op 	}
135 3c1cf9d0 2021-01-11 op 
136 3c1cf9d0 2021-01-11 op 	*p->iri = '\0';
137 f7b816dc 2021-01-15 op 	if (p->iri[1] != '/' || p->iri[2] != '/') {
138 3c1cf9d0 2021-01-11 op 		p->err = "invalid marker after scheme";
139 3c1cf9d0 2021-01-11 op 		return 0;
140 3c1cf9d0 2021-01-11 op 	}
141 3c1cf9d0 2021-01-11 op 
142 f7b816dc 2021-01-15 op 	p->iri += 3;
143 3c1cf9d0 2021-01-11 op 	return 1;
144 3c1cf9d0 2021-01-11 op }
145 3c1cf9d0 2021-01-11 op 
146 3c1cf9d0 2021-01-11 op /* *DIGIT */
147 3c1cf9d0 2021-01-11 op static int
148 3c1cf9d0 2021-01-11 op parse_port(struct parser *p)
149 3c1cf9d0 2021-01-11 op {
150 3c1cf9d0 2021-01-11 op 	uint32_t i = 0;
151 3c1cf9d0 2021-01-11 op 
152 3c1cf9d0 2021-01-11 op 	p->parsed->port = p->iri;
153 3c1cf9d0 2021-01-11 op 
154 3c1cf9d0 2021-01-11 op 	for (; isdigit(*p->iri); p->iri++) {
155 3c1cf9d0 2021-01-11 op 		i = i * 10 + *p->iri - '0';
156 3c1cf9d0 2021-01-11 op 		if (i > UINT16_MAX) {
157 3c1cf9d0 2021-01-11 op 			p->err = "port number too large";
158 3c1cf9d0 2021-01-11 op 			return 0;
159 3c1cf9d0 2021-01-11 op 		}
160 3c1cf9d0 2021-01-11 op 	}
161 3c1cf9d0 2021-01-11 op 
162 3c1cf9d0 2021-01-11 op 	if (*p->iri != '/' && *p->iri != '\0') {
163 3c1cf9d0 2021-01-11 op 		p->err = "illegal character in port number";
164 3c1cf9d0 2021-01-11 op 		return 0;
165 3c1cf9d0 2021-01-11 op 	}
166 3c1cf9d0 2021-01-11 op 
167 3c1cf9d0 2021-01-11 op 	p->parsed->port_no = i;
168 3c1cf9d0 2021-01-11 op 
169 3c1cf9d0 2021-01-11 op 	if (*p->iri != '\0') {
170 3c1cf9d0 2021-01-11 op 		*p->iri = '\0';
171 3c1cf9d0 2021-01-11 op 		p->iri++;
172 3c1cf9d0 2021-01-11 op 	}
173 3c1cf9d0 2021-01-11 op 
174 3c1cf9d0 2021-01-11 op 	return 1;
175 3c1cf9d0 2021-01-11 op }
176 3c1cf9d0 2021-01-11 op 
177 3c1cf9d0 2021-01-11 op /* TODO: add support for ip-literal and ipv4addr ? */
178 3c1cf9d0 2021-01-11 op /* *( unreserved / sub-delims / pct-encoded ) */
179 3c1cf9d0 2021-01-11 op static int
180 3c1cf9d0 2021-01-11 op parse_authority(struct parser *p)
181 3c1cf9d0 2021-01-11 op {
182 3c1cf9d0 2021-01-11 op 	p->parsed->host = p->iri;
183 3c1cf9d0 2021-01-11 op 
184 3c1cf9d0 2021-01-11 op 	while (unreserved(*p->iri)
185 3c1cf9d0 2021-01-11 op 	    || sub_delimiters(*p->iri)
186 117ac52c 2021-01-29 op 	    || parse_pct_encoded(p)
187 117ac52c 2021-01-29 op 	    || valid_multibyte_utf8(p)) {
188 e4d82bec 2021-01-15 op 		/* normalize the host name. */
189 e4d82bec 2021-01-15 op 		if (*p->iri < 0x7F)
190 e4d82bec 2021-01-15 op 			*p->iri = tolower(*p->iri);
191 3c1cf9d0 2021-01-11 op 		p->iri++;
192 e4d82bec 2021-01-15 op 	}
193 3c1cf9d0 2021-01-11 op 
194 3c1cf9d0 2021-01-11 op 	if (p->err != NULL)
195 3c1cf9d0 2021-01-11 op 		return 0;
196 3c1cf9d0 2021-01-11 op 
197 3c1cf9d0 2021-01-11 op 	if (*p->iri == ':') {
198 3c1cf9d0 2021-01-11 op 		*p->iri = '\0';
199 3c1cf9d0 2021-01-11 op 		p->iri++;
200 3c1cf9d0 2021-01-11 op 		return parse_port(p);
201 b777bf4b 2021-01-15 op 	} else
202 b777bf4b 2021-01-15 op 		p->parsed->port_no = 1965;
203 3c1cf9d0 2021-01-11 op 
204 3c1cf9d0 2021-01-11 op 	if (*p->iri == '/') {
205 3c1cf9d0 2021-01-11 op 		*p->iri = '\0';
206 3c1cf9d0 2021-01-11 op 		p->iri++;
207 3c1cf9d0 2021-01-11 op 		return 1;
208 3c1cf9d0 2021-01-11 op 	}
209 3c1cf9d0 2021-01-11 op 
210 3c1cf9d0 2021-01-11 op 	if (*p->iri == '\0')
211 3c1cf9d0 2021-01-11 op 		return 1;
212 3c1cf9d0 2021-01-11 op 
213 3c1cf9d0 2021-01-11 op 	p->err = "illegal character in authority section";
214 3c1cf9d0 2021-01-11 op 	return 0;
215 3c1cf9d0 2021-01-11 op }
216 3c1cf9d0 2021-01-11 op 
217 3c1cf9d0 2021-01-11 op /* Routine for path_clean.  Elide the pointed .. with the preceding
218 3c1cf9d0 2021-01-11 op  * element.  Return 0 if it's not possible.  incr is the length of
219 3c1cf9d0 2021-01-11 op  * the increment, 3 for ../ and 2 for .. */
220 3c1cf9d0 2021-01-11 op static int
221 3c1cf9d0 2021-01-11 op path_elide_dotdot(char *path, char *i, int incr)
222 3c1cf9d0 2021-01-11 op {
223 3c1cf9d0 2021-01-11 op 	char *j;
224 3c1cf9d0 2021-01-11 op 
225 3c1cf9d0 2021-01-11 op 	if (i == path)
226 3c1cf9d0 2021-01-11 op 		return 0;
227 3c1cf9d0 2021-01-11 op 	for (j = i-2; j != path && *j != '/'; j--)
228 3c1cf9d0 2021-01-11 op                 /* noop */ ;
229 3c1cf9d0 2021-01-11 op 	if (*j == '/')
230 3c1cf9d0 2021-01-11 op 		j++;
231 3c1cf9d0 2021-01-11 op 	i += incr;
232 3c1cf9d0 2021-01-11 op 	memmove(j, i, strlen(i)+1);
233 3c1cf9d0 2021-01-11 op 	return 1;
234 3c1cf9d0 2021-01-11 op }
235 3c1cf9d0 2021-01-11 op 
236 3c1cf9d0 2021-01-11 op /*
237 3c1cf9d0 2021-01-11 op  * Use an algorithm similar to the one implemented in go' path.Clean:
238 3c1cf9d0 2021-01-11 op  *
239 3c1cf9d0 2021-01-11 op  * 1. Replace multiple slashes with a single slash
240 3c1cf9d0 2021-01-11 op  * 2. Eliminate each . path name element
241 3c1cf9d0 2021-01-11 op  * 3. Eliminate each inner .. along with the non-.. element that precedes it
242 3c1cf9d0 2021-01-11 op  * 4. Eliminate trailing .. if possible or error (go would only discard)
243 3c1cf9d0 2021-01-11 op  *
244 3c1cf9d0 2021-01-11 op  * Unlike path.Clean, this function return the empty string if the
245 3c1cf9d0 2021-01-11 op  * original path is equivalent to "/".
246 3c1cf9d0 2021-01-11 op  */
247 3c1cf9d0 2021-01-11 op static int
248 3c1cf9d0 2021-01-11 op path_clean(char *path)
249 3c1cf9d0 2021-01-11 op {
250 3c1cf9d0 2021-01-11 op 	char *i;
251 3c1cf9d0 2021-01-11 op 
252 3c1cf9d0 2021-01-11 op 	/* 1. replace multiple slashes with a single one */
253 3c1cf9d0 2021-01-11 op 	for (i = path; *i; ++i) {
254 3c1cf9d0 2021-01-11 op 		if (*i == '/' && *(i+1) == '/') {
255 3c1cf9d0 2021-01-11 op 			memmove(i, i+1, strlen(i)); /* move also the \0 */
256 3c1cf9d0 2021-01-11 op 			i--;
257 3c1cf9d0 2021-01-11 op 		}
258 3c1cf9d0 2021-01-11 op 	}
259 3c1cf9d0 2021-01-11 op 
260 3c1cf9d0 2021-01-11 op 	/* 2. eliminate each . path name element */
261 3c1cf9d0 2021-01-11 op 	for (i = path; *i; ++i) {
262 6a9ae707 2021-01-11 op 		if ((i == path || *i == '/') &&
263 6a9ae707 2021-01-11 op 		    *i != '.' && i[1] == '.' && i[2] == '/') {
264 3c1cf9d0 2021-01-11 op 			/* move also the \0 */
265 3c1cf9d0 2021-01-11 op 			memmove(i, i+2, strlen(i)-1);
266 3c1cf9d0 2021-01-11 op 			i--;
267 3c1cf9d0 2021-01-11 op 		}
268 3c1cf9d0 2021-01-11 op 	}
269 3c1cf9d0 2021-01-11 op 	if (!strcmp(path, ".") || !strcmp(path, "/.")) {
270 3c1cf9d0 2021-01-11 op 		*path = '\0';
271 3c1cf9d0 2021-01-11 op 		return 1;
272 3c1cf9d0 2021-01-11 op 	}
273 3c1cf9d0 2021-01-11 op 
274 3c1cf9d0 2021-01-11 op 	/* 3. eliminate each inner .. along with the preceding non-.. */
275 3c1cf9d0 2021-01-11 op 	for (i = strstr(path, "../"); i != NULL; i = strstr(path, ".."))
276 3c1cf9d0 2021-01-11 op 		if (!path_elide_dotdot(path, i, 3))
277 3c1cf9d0 2021-01-11 op 			return 0;
278 3c1cf9d0 2021-01-11 op 
279 3c1cf9d0 2021-01-11 op 	/* 4. eliminate trailing ..*/
280 3c1cf9d0 2021-01-11 op 	if ((i = strstr(path, "..")) != NULL)
281 3c1cf9d0 2021-01-11 op 		if (!path_elide_dotdot(path, i, 2))
282 3c1cf9d0 2021-01-11 op 			return 0;
283 3c1cf9d0 2021-01-11 op 
284 3c1cf9d0 2021-01-11 op 	return 1;
285 3c1cf9d0 2021-01-11 op }
286 3c1cf9d0 2021-01-11 op 
287 3c1cf9d0 2021-01-11 op static int
288 3c1cf9d0 2021-01-11 op parse_query(struct parser *p)
289 3c1cf9d0 2021-01-11 op {
290 3c1cf9d0 2021-01-11 op 	p->parsed->query = p->iri;
291 3c1cf9d0 2021-01-11 op 	if (*p->iri == '\0')
292 3c1cf9d0 2021-01-11 op 		return 1;
293 3c1cf9d0 2021-01-11 op 
294 3c1cf9d0 2021-01-11 op 	while (unreserved(*p->iri)
295 3c1cf9d0 2021-01-11 op 	    || sub_delimiters(*p->iri)
296 3c1cf9d0 2021-01-11 op 	    || *p->iri == '/'
297 3c1cf9d0 2021-01-11 op 	    || *p->iri == '?'
298 19e7bd00 2021-02-06 op 	    || *p->iri == ':'
299 19e7bd00 2021-02-06 op 	    || *p->iri == '@'
300 8404ec30 2021-02-05 op 	    || valid_pct_encoded(p)
301 3c1cf9d0 2021-01-11 op 	    || valid_multibyte_utf8(p))
302 3c1cf9d0 2021-01-11 op 		p->iri++;
303 3c1cf9d0 2021-01-11 op 
304 3c1cf9d0 2021-01-11 op 	if (p->err != NULL)
305 3c1cf9d0 2021-01-11 op 		return 0;
306 3c1cf9d0 2021-01-11 op 
307 3c1cf9d0 2021-01-11 op 	if (*p->iri != '\0' && *p->iri != '#') {
308 3c1cf9d0 2021-01-11 op 		p->err = "illegal character in query";
309 3c1cf9d0 2021-01-11 op 		return 0;
310 3c1cf9d0 2021-01-11 op 	}
311 3c1cf9d0 2021-01-11 op 
312 3c1cf9d0 2021-01-11 op 	if (*p->iri != '\0') {
313 3c1cf9d0 2021-01-11 op 		*p->iri = '\0';
314 3c1cf9d0 2021-01-11 op 		p->iri++;
315 3c1cf9d0 2021-01-11 op 	}
316 3c1cf9d0 2021-01-11 op 
317 3c1cf9d0 2021-01-11 op 	return 1;
318 3c1cf9d0 2021-01-11 op }
319 3c1cf9d0 2021-01-11 op 
320 3c1cf9d0 2021-01-11 op /* don't even bother */
321 3c1cf9d0 2021-01-11 op static int
322 3c1cf9d0 2021-01-11 op parse_fragment(struct parser *p)
323 3c1cf9d0 2021-01-11 op {
324 3c1cf9d0 2021-01-11 op 	p->parsed->fragment = p->iri;
325 3c1cf9d0 2021-01-11 op 	return 1;
326 3c1cf9d0 2021-01-11 op }
327 3c1cf9d0 2021-01-11 op 
328 3c1cf9d0 2021-01-11 op /* XXX: is it too broad? */
329 3c1cf9d0 2021-01-11 op /* *(pchar / "/") */
330 3c1cf9d0 2021-01-11 op static int
331 3c1cf9d0 2021-01-11 op parse_path(struct parser *p)
332 3c1cf9d0 2021-01-11 op {
333 3c1cf9d0 2021-01-11 op 	char c;
334 42bbdc79 2021-01-21 op 
335 42bbdc79 2021-01-21 op 	/* trim initial slashes */
336 42bbdc79 2021-01-21 op 	while (*p->iri == '/')
337 42bbdc79 2021-01-21 op 		p->iri++;
338 3c1cf9d0 2021-01-11 op 
339 3c1cf9d0 2021-01-11 op 	p->parsed->path = p->iri;
340 3c1cf9d0 2021-01-11 op 	if (*p->iri == '\0') {
341 3c1cf9d0 2021-01-11 op 		p->parsed->query = p->parsed->fragment = p->iri;
342 3c1cf9d0 2021-01-11 op 		return 1;
343 3c1cf9d0 2021-01-11 op 	}
344 3c1cf9d0 2021-01-11 op 
345 3c1cf9d0 2021-01-11 op 	while (unreserved(*p->iri)
346 3c1cf9d0 2021-01-11 op 	    || sub_delimiters(*p->iri)
347 3c1cf9d0 2021-01-11 op 	    || *p->iri == '/'
348 3c1cf9d0 2021-01-11 op 	    || parse_pct_encoded(p)
349 3c1cf9d0 2021-01-11 op 	    || valid_multibyte_utf8(p))
350 3c1cf9d0 2021-01-11 op 		p->iri++;
351 3c1cf9d0 2021-01-11 op 
352 3c1cf9d0 2021-01-11 op 	if (p->err != NULL)
353 3c1cf9d0 2021-01-11 op 		return 0;
354 3c1cf9d0 2021-01-11 op 
355 3c1cf9d0 2021-01-11 op 	if (*p->iri != '\0' && *p->iri != '?' && *p->iri != '#') {
356 3c1cf9d0 2021-01-11 op 		p->err = "illegal character in path";
357 3c1cf9d0 2021-01-11 op 		return 0;
358 3c1cf9d0 2021-01-11 op 	}
359 3c1cf9d0 2021-01-11 op 
360 3c1cf9d0 2021-01-11 op 	if (*p->iri != '\0') {
361 3c1cf9d0 2021-01-11 op 		c = *p->iri;
362 3c1cf9d0 2021-01-11 op 		*p->iri = '\0';
363 3c1cf9d0 2021-01-11 op 		p->iri++;
364 3c1cf9d0 2021-01-11 op 
365 3c1cf9d0 2021-01-11 op 		if (c == '#') {
366 3c1cf9d0 2021-01-11 op 			if (!parse_fragment(p))
367 3c1cf9d0 2021-01-11 op 				return 0;
368 3c1cf9d0 2021-01-11 op 		} else
369 3c1cf9d0 2021-01-11 op 			if (!parse_query(p) || !parse_fragment(p))
370 3c1cf9d0 2021-01-11 op 				return 0;
371 3c1cf9d0 2021-01-11 op 	}
372 3c1cf9d0 2021-01-11 op 
373 3c1cf9d0 2021-01-11 op 	if (!path_clean(p->parsed->path)) {
374 3c1cf9d0 2021-01-11 op 		p->err = "illegal path";
375 3c1cf9d0 2021-01-11 op 		return 0;
376 3c1cf9d0 2021-01-11 op 	}
377 3c1cf9d0 2021-01-11 op 
378 3c1cf9d0 2021-01-11 op 	return 1;
379 3c1cf9d0 2021-01-11 op }
380 3c1cf9d0 2021-01-11 op 
381 3c1cf9d0 2021-01-11 op int
382 3c1cf9d0 2021-01-11 op parse_iri(char *iri, struct iri *ret, const char **err_ret)
383 3c1cf9d0 2021-01-11 op {
384 3c1cf9d0 2021-01-11 op 	char *end;
385 3c1cf9d0 2021-01-11 op 	struct parser p = {iri, ret, NULL};
386 3c1cf9d0 2021-01-11 op 
387 3c1cf9d0 2021-01-11 op 	bzero(ret, sizeof(*ret));
388 3c1cf9d0 2021-01-11 op 
389 3c1cf9d0 2021-01-11 op 	/* initialize optional stuff to the empty string */
390 3c1cf9d0 2021-01-11 op 	end = iri + strlen(iri);
391 57d0d0ad 2021-01-31 op 	p.parsed->host = end;
392 3c1cf9d0 2021-01-11 op 	p.parsed->port = end;
393 3c1cf9d0 2021-01-11 op 	p.parsed->path = end;
394 3c1cf9d0 2021-01-11 op 	p.parsed->query = end;
395 3c1cf9d0 2021-01-11 op 	p.parsed->fragment = end;
396 3c1cf9d0 2021-01-11 op 
397 3c1cf9d0 2021-01-11 op 	if (!parse_scheme(&p) || !parse_authority(&p) || !parse_path(&p)) {
398 3c1cf9d0 2021-01-11 op 		*err_ret = p.err;
399 3c1cf9d0 2021-01-11 op 		return 0;
400 3c1cf9d0 2021-01-11 op 	}
401 3c1cf9d0 2021-01-11 op 
402 3c1cf9d0 2021-01-11 op 	*err_ret = NULL;
403 3c1cf9d0 2021-01-11 op 	return 1;
404 3c1cf9d0 2021-01-11 op }
405 3c1cf9d0 2021-01-11 op 
406 3c1cf9d0 2021-01-11 op int
407 c4f682f8 2021-01-27 op trim_req_iri(char *iri, const char **err)
408 3c1cf9d0 2021-01-11 op {
409 3c1cf9d0 2021-01-11 op 	char *i;
410 3c1cf9d0 2021-01-11 op 
411 c4f682f8 2021-01-27 op 	if ((i = strstr(iri, "\r\n")) == NULL) {
412 c4f682f8 2021-01-27 op 		*err = "missing CRLF";
413 3c1cf9d0 2021-01-11 op 		return 0;
414 c4f682f8 2021-01-27 op 	}
415 3c1cf9d0 2021-01-11 op 	*i = '\0';
416 3c1cf9d0 2021-01-11 op 	return 1;
417 2fafa2d2 2021-02-01 op }
418 2fafa2d2 2021-02-01 op 
419 2fafa2d2 2021-02-01 op 
420 2fafa2d2 2021-02-01 op int
421 2fafa2d2 2021-02-01 op serialize_iri(struct iri *i, char *buf, size_t len)
422 2fafa2d2 2021-02-01 op {
423 2fafa2d2 2021-02-01 op 	size_t l;
424 2fafa2d2 2021-02-01 op 
425 2fafa2d2 2021-02-01 op 	/* in ex.c we receive empty "" strings as NULL */
426 2fafa2d2 2021-02-01 op 	if (i->schema == NULL || i->host == NULL) {
427 2fafa2d2 2021-02-01 op 		memset(buf, 0, len);
428 2fafa2d2 2021-02-01 op 		return 0;
429 2fafa2d2 2021-02-01 op 	}
430 2fafa2d2 2021-02-01 op 
431 2fafa2d2 2021-02-01 op 	strlcpy(buf, i->schema, len);
432 2fafa2d2 2021-02-01 op 	strlcat(buf, "://", len);
433 2fafa2d2 2021-02-01 op         strlcat(buf, i->host, len);
434 2fafa2d2 2021-02-01 op 	strlcat(buf, "/", len);
435 2fafa2d2 2021-02-01 op 
436 2fafa2d2 2021-02-01 op 	if (i->path != NULL)
437 2fafa2d2 2021-02-01 op 		l = strlcat(buf, i->path, len);
438 2fafa2d2 2021-02-01 op 
439 2fafa2d2 2021-02-01 op 	if (i->query != NULL && *i->query != '\0') {
440 2fafa2d2 2021-02-01 op 		strlcat(buf, "?", len);
441 2fafa2d2 2021-02-01 op 		l = strlcat(buf, i->query, len);
442 2fafa2d2 2021-02-01 op 	}
443 2fafa2d2 2021-02-01 op 
444 2fafa2d2 2021-02-01 op 	return l < len;
445 3c1cf9d0 2021-01-11 op }
446 9f006a21 2021-02-07 op 
447 9f006a21 2021-02-07 op char *
448 9f006a21 2021-02-07 op pct_decode_str(char *s)
449 9f006a21 2021-02-07 op {
450 9f006a21 2021-02-07 op 	char *t;
451 9f006a21 2021-02-07 op 
452 9f006a21 2021-02-07 op 	for (t = s; *t; ++t) {
453 9f006a21 2021-02-07 op 		if (*t == '%' && valid_pct_enc_string(t))
454 9f006a21 2021-02-07 op 			pct_decode(t);
455 9f006a21 2021-02-07 op 	}
456 9f006a21 2021-02-07 op 
457 9f006a21 2021-02-07 op 	return s;
458 9f006a21 2021-02-07 op }