1 /*
2 * nghttp2 - HTTP/2 C Library
3 *
4 * Copyright (c) 2012 Tatsuhiro Tsujikawa
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining
7 * a copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sublicense, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be
15 * included in all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
20 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
21 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
22 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
23 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24 */
25 #include "nghttp2_helper.h"
26
27 #include <assert.h>
28 #include <string.h>
29
30 #include "nghttp2_net.h"
31
nghttp2_put_uint16be(uint8_t * buf,uint16_t n)32 void nghttp2_put_uint16be(uint8_t *buf, uint16_t n) {
33 uint16_t x = htons(n);
34 memcpy(buf, &x, sizeof(uint16_t));
35 }
36
nghttp2_put_uint32be(uint8_t * buf,uint32_t n)37 void nghttp2_put_uint32be(uint8_t *buf, uint32_t n) {
38 uint32_t x = htonl(n);
39 memcpy(buf, &x, sizeof(uint32_t));
40 }
41
nghttp2_get_uint16(const uint8_t * data)42 uint16_t nghttp2_get_uint16(const uint8_t *data) {
43 uint16_t n;
44 memcpy(&n, data, sizeof(uint16_t));
45 return ntohs(n);
46 }
47
nghttp2_get_uint32(const uint8_t * data)48 uint32_t nghttp2_get_uint32(const uint8_t *data) {
49 uint32_t n;
50 memcpy(&n, data, sizeof(uint32_t));
51 return ntohl(n);
52 }
53
54 /* Generated by gendowncasetbl.py */
55 static const uint8_t DOWNCASE_TBL[] = {
56 0 /* NUL */, 1 /* SOH */, 2 /* STX */, 3 /* ETX */,
57 4 /* EOT */, 5 /* ENQ */, 6 /* ACK */, 7 /* BEL */,
58 8 /* BS */, 9 /* HT */, 10 /* LF */, 11 /* VT */,
59 12 /* FF */, 13 /* CR */, 14 /* SO */, 15 /* SI */,
60 16 /* DLE */, 17 /* DC1 */, 18 /* DC2 */, 19 /* DC3 */,
61 20 /* DC4 */, 21 /* NAK */, 22 /* SYN */, 23 /* ETB */,
62 24 /* CAN */, 25 /* EM */, 26 /* SUB */, 27 /* ESC */,
63 28 /* FS */, 29 /* GS */, 30 /* RS */, 31 /* US */,
64 32 /* SPC */, 33 /* ! */, 34 /* " */, 35 /* # */,
65 36 /* $ */, 37 /* % */, 38 /* & */, 39 /* ' */,
66 40 /* ( */, 41 /* ) */, 42 /* * */, 43 /* + */,
67 44 /* , */, 45 /* - */, 46 /* . */, 47 /* / */,
68 48 /* 0 */, 49 /* 1 */, 50 /* 2 */, 51 /* 3 */,
69 52 /* 4 */, 53 /* 5 */, 54 /* 6 */, 55 /* 7 */,
70 56 /* 8 */, 57 /* 9 */, 58 /* : */, 59 /* ; */,
71 60 /* < */, 61 /* = */, 62 /* > */, 63 /* ? */,
72 64 /* @ */, 97 /* A */, 98 /* B */, 99 /* C */,
73 100 /* D */, 101 /* E */, 102 /* F */, 103 /* G */,
74 104 /* H */, 105 /* I */, 106 /* J */, 107 /* K */,
75 108 /* L */, 109 /* M */, 110 /* N */, 111 /* O */,
76 112 /* P */, 113 /* Q */, 114 /* R */, 115 /* S */,
77 116 /* T */, 117 /* U */, 118 /* V */, 119 /* W */,
78 120 /* X */, 121 /* Y */, 122 /* Z */, 91 /* [ */,
79 92 /* \ */, 93 /* ] */, 94 /* ^ */, 95 /* _ */,
80 96 /* ` */, 97 /* a */, 98 /* b */, 99 /* c */,
81 100 /* d */, 101 /* e */, 102 /* f */, 103 /* g */,
82 104 /* h */, 105 /* i */, 106 /* j */, 107 /* k */,
83 108 /* l */, 109 /* m */, 110 /* n */, 111 /* o */,
84 112 /* p */, 113 /* q */, 114 /* r */, 115 /* s */,
85 116 /* t */, 117 /* u */, 118 /* v */, 119 /* w */,
86 120 /* x */, 121 /* y */, 122 /* z */, 123 /* { */,
87 124 /* | */, 125 /* } */, 126 /* ~ */, 127 /* DEL */,
88 128 /* 0x80 */, 129 /* 0x81 */, 130 /* 0x82 */, 131 /* 0x83 */,
89 132 /* 0x84 */, 133 /* 0x85 */, 134 /* 0x86 */, 135 /* 0x87 */,
90 136 /* 0x88 */, 137 /* 0x89 */, 138 /* 0x8a */, 139 /* 0x8b */,
91 140 /* 0x8c */, 141 /* 0x8d */, 142 /* 0x8e */, 143 /* 0x8f */,
92 144 /* 0x90 */, 145 /* 0x91 */, 146 /* 0x92 */, 147 /* 0x93 */,
93 148 /* 0x94 */, 149 /* 0x95 */, 150 /* 0x96 */, 151 /* 0x97 */,
94 152 /* 0x98 */, 153 /* 0x99 */, 154 /* 0x9a */, 155 /* 0x9b */,
95 156 /* 0x9c */, 157 /* 0x9d */, 158 /* 0x9e */, 159 /* 0x9f */,
96 160 /* 0xa0 */, 161 /* 0xa1 */, 162 /* 0xa2 */, 163 /* 0xa3 */,
97 164 /* 0xa4 */, 165 /* 0xa5 */, 166 /* 0xa6 */, 167 /* 0xa7 */,
98 168 /* 0xa8 */, 169 /* 0xa9 */, 170 /* 0xaa */, 171 /* 0xab */,
99 172 /* 0xac */, 173 /* 0xad */, 174 /* 0xae */, 175 /* 0xaf */,
100 176 /* 0xb0 */, 177 /* 0xb1 */, 178 /* 0xb2 */, 179 /* 0xb3 */,
101 180 /* 0xb4 */, 181 /* 0xb5 */, 182 /* 0xb6 */, 183 /* 0xb7 */,
102 184 /* 0xb8 */, 185 /* 0xb9 */, 186 /* 0xba */, 187 /* 0xbb */,
103 188 /* 0xbc */, 189 /* 0xbd */, 190 /* 0xbe */, 191 /* 0xbf */,
104 192 /* 0xc0 */, 193 /* 0xc1 */, 194 /* 0xc2 */, 195 /* 0xc3 */,
105 196 /* 0xc4 */, 197 /* 0xc5 */, 198 /* 0xc6 */, 199 /* 0xc7 */,
106 200 /* 0xc8 */, 201 /* 0xc9 */, 202 /* 0xca */, 203 /* 0xcb */,
107 204 /* 0xcc */, 205 /* 0xcd */, 206 /* 0xce */, 207 /* 0xcf */,
108 208 /* 0xd0 */, 209 /* 0xd1 */, 210 /* 0xd2 */, 211 /* 0xd3 */,
109 212 /* 0xd4 */, 213 /* 0xd5 */, 214 /* 0xd6 */, 215 /* 0xd7 */,
110 216 /* 0xd8 */, 217 /* 0xd9 */, 218 /* 0xda */, 219 /* 0xdb */,
111 220 /* 0xdc */, 221 /* 0xdd */, 222 /* 0xde */, 223 /* 0xdf */,
112 224 /* 0xe0 */, 225 /* 0xe1 */, 226 /* 0xe2 */, 227 /* 0xe3 */,
113 228 /* 0xe4 */, 229 /* 0xe5 */, 230 /* 0xe6 */, 231 /* 0xe7 */,
114 232 /* 0xe8 */, 233 /* 0xe9 */, 234 /* 0xea */, 235 /* 0xeb */,
115 236 /* 0xec */, 237 /* 0xed */, 238 /* 0xee */, 239 /* 0xef */,
116 240 /* 0xf0 */, 241 /* 0xf1 */, 242 /* 0xf2 */, 243 /* 0xf3 */,
117 244 /* 0xf4 */, 245 /* 0xf5 */, 246 /* 0xf6 */, 247 /* 0xf7 */,
118 248 /* 0xf8 */, 249 /* 0xf9 */, 250 /* 0xfa */, 251 /* 0xfb */,
119 252 /* 0xfc */, 253 /* 0xfd */, 254 /* 0xfe */, 255 /* 0xff */,
120 };
121
nghttp2_downcase(uint8_t * s,size_t len)122 void nghttp2_downcase(uint8_t *s, size_t len) {
123 size_t i;
124 for (i = 0; i < len; ++i) {
125 s[i] = DOWNCASE_TBL[s[i]];
126 }
127 }
128
129 /*
130 * local_window_size
131 * ^ *
132 * | * recv_window_size
133 * | * * ^
134 * | * * |
135 * 0+++++++++
136 * | * * \
137 * | * * | This rage is hidden in flow control. But it must be
138 * v * * / kept in order to restore it when window size is enlarged.
139 * recv_reduction
140 * (+ for negative direction)
141 *
142 * recv_window_size could be negative if we decrease
143 * local_window_size more than recv_window_size:
144 *
145 * local_window_size
146 * ^ *
147 * | *
148 * | *
149 * 0++++++++
150 * | * ^ recv_window_size (negative)
151 * | * |
152 * v * *
153 * recv_reduction
154 */
nghttp2_adjust_local_window_size(int32_t * local_window_size_ptr,int32_t * recv_window_size_ptr,int32_t * recv_reduction_ptr,int32_t * delta_ptr)155 int nghttp2_adjust_local_window_size(int32_t *local_window_size_ptr,
156 int32_t *recv_window_size_ptr,
157 int32_t *recv_reduction_ptr,
158 int32_t *delta_ptr) {
159 if (*delta_ptr > 0) {
160 int32_t recv_reduction_delta;
161 int32_t delta;
162 int32_t new_recv_window_size =
163 nghttp2_max(0, *recv_window_size_ptr) - *delta_ptr;
164
165 if (new_recv_window_size >= 0) {
166 *recv_window_size_ptr = new_recv_window_size;
167 return 0;
168 }
169
170 delta = -new_recv_window_size;
171
172 /* The delta size is strictly more than received bytes. Increase
173 local_window_size by that difference |delta|. */
174 if (*local_window_size_ptr > NGHTTP2_MAX_WINDOW_SIZE - delta) {
175 return NGHTTP2_ERR_FLOW_CONTROL;
176 }
177 *local_window_size_ptr += delta;
178 /* If there is recv_reduction due to earlier window_size
179 reduction, we have to adjust it too. */
180 recv_reduction_delta = nghttp2_min(*recv_reduction_ptr, delta);
181 *recv_reduction_ptr -= recv_reduction_delta;
182 if (*recv_window_size_ptr < 0) {
183 *recv_window_size_ptr += recv_reduction_delta;
184 } else {
185 /* If *recv_window_size_ptr > 0, then those bytes are going to
186 be returned to the remote peer (by WINDOW_UPDATE with the
187 adjusted *delta_ptr), so it is effectively 0 now. We set to
188 *recv_reduction_delta, because caller does not take into
189 account it in *delta_ptr. */
190 *recv_window_size_ptr = recv_reduction_delta;
191 }
192 /* recv_reduction_delta must be paid from *delta_ptr, since it was
193 added in window size reduction (see below). */
194 *delta_ptr -= recv_reduction_delta;
195
196 return 0;
197 }
198
199 if (*local_window_size_ptr + *delta_ptr < 0 ||
200 *recv_window_size_ptr < INT32_MIN - *delta_ptr ||
201 *recv_reduction_ptr > INT32_MAX + *delta_ptr) {
202 return NGHTTP2_ERR_FLOW_CONTROL;
203 }
204 /* Decreasing local window size. Note that we achieve this without
205 noticing to the remote peer. To do this, we cut
206 recv_window_size by -delta. This means that we don't send
207 WINDOW_UPDATE for -delta bytes. */
208 *local_window_size_ptr += *delta_ptr;
209 *recv_window_size_ptr += *delta_ptr;
210 *recv_reduction_ptr -= *delta_ptr;
211 *delta_ptr = 0;
212
213 return 0;
214 }
215
nghttp2_increase_local_window_size(int32_t * local_window_size_ptr,int32_t * recv_window_size_ptr,int32_t * recv_reduction_ptr,int32_t * delta_ptr)216 int nghttp2_increase_local_window_size(int32_t *local_window_size_ptr,
217 int32_t *recv_window_size_ptr,
218 int32_t *recv_reduction_ptr,
219 int32_t *delta_ptr) {
220 int32_t recv_reduction_delta;
221 int32_t delta;
222
223 delta = *delta_ptr;
224
225 assert(delta >= 0);
226
227 /* The delta size is strictly more than received bytes. Increase
228 local_window_size by that difference |delta|. */
229 if (*local_window_size_ptr > NGHTTP2_MAX_WINDOW_SIZE - delta) {
230 return NGHTTP2_ERR_FLOW_CONTROL;
231 }
232
233 *local_window_size_ptr += delta;
234 /* If there is recv_reduction due to earlier window_size
235 reduction, we have to adjust it too. */
236 recv_reduction_delta = nghttp2_min(*recv_reduction_ptr, delta);
237 *recv_reduction_ptr -= recv_reduction_delta;
238
239 *recv_window_size_ptr += recv_reduction_delta;
240
241 /* recv_reduction_delta must be paid from *delta_ptr, since it was
242 added in window size reduction (see below). */
243 *delta_ptr -= recv_reduction_delta;
244
245 return 0;
246 }
247
nghttp2_should_send_window_update(int32_t local_window_size,int32_t recv_window_size)248 int nghttp2_should_send_window_update(int32_t local_window_size,
249 int32_t recv_window_size) {
250 return recv_window_size > 0 && recv_window_size >= local_window_size / 2;
251 }
252
nghttp2_strerror(int error_code)253 const char *nghttp2_strerror(int error_code) {
254 switch (error_code) {
255 case 0:
256 return "Success";
257 case NGHTTP2_ERR_INVALID_ARGUMENT:
258 return "Invalid argument";
259 case NGHTTP2_ERR_BUFFER_ERROR:
260 return "Out of buffer space";
261 case NGHTTP2_ERR_UNSUPPORTED_VERSION:
262 return "Unsupported SPDY version";
263 case NGHTTP2_ERR_WOULDBLOCK:
264 return "Operation would block";
265 case NGHTTP2_ERR_PROTO:
266 return "Protocol error";
267 case NGHTTP2_ERR_INVALID_FRAME:
268 return "Invalid frame octets";
269 case NGHTTP2_ERR_EOF:
270 return "EOF";
271 case NGHTTP2_ERR_DEFERRED:
272 return "Data transfer deferred";
273 case NGHTTP2_ERR_STREAM_ID_NOT_AVAILABLE:
274 return "No more Stream ID available";
275 case NGHTTP2_ERR_STREAM_CLOSED:
276 return "Stream was already closed or invalid";
277 case NGHTTP2_ERR_STREAM_CLOSING:
278 return "Stream is closing";
279 case NGHTTP2_ERR_STREAM_SHUT_WR:
280 return "The transmission is not allowed for this stream";
281 case NGHTTP2_ERR_INVALID_STREAM_ID:
282 return "Stream ID is invalid";
283 case NGHTTP2_ERR_INVALID_STREAM_STATE:
284 return "Invalid stream state";
285 case NGHTTP2_ERR_DEFERRED_DATA_EXIST:
286 return "Another DATA frame has already been deferred";
287 case NGHTTP2_ERR_START_STREAM_NOT_ALLOWED:
288 return "request HEADERS is not allowed";
289 case NGHTTP2_ERR_GOAWAY_ALREADY_SENT:
290 return "GOAWAY has already been sent";
291 case NGHTTP2_ERR_INVALID_HEADER_BLOCK:
292 return "Invalid header block";
293 case NGHTTP2_ERR_INVALID_STATE:
294 return "Invalid state";
295 case NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE:
296 return "The user callback function failed due to the temporal error";
297 case NGHTTP2_ERR_FRAME_SIZE_ERROR:
298 return "The length of the frame is invalid";
299 case NGHTTP2_ERR_HEADER_COMP:
300 return "Header compression/decompression error";
301 case NGHTTP2_ERR_FLOW_CONTROL:
302 return "Flow control error";
303 case NGHTTP2_ERR_INSUFF_BUFSIZE:
304 return "Insufficient buffer size given to function";
305 case NGHTTP2_ERR_PAUSE:
306 return "Callback was paused by the application";
307 case NGHTTP2_ERR_TOO_MANY_INFLIGHT_SETTINGS:
308 return "Too many inflight SETTINGS";
309 case NGHTTP2_ERR_PUSH_DISABLED:
310 return "Server push is disabled by peer";
311 case NGHTTP2_ERR_DATA_EXIST:
312 return "DATA or HEADERS frame has already been submitted for the stream";
313 case NGHTTP2_ERR_SESSION_CLOSING:
314 return "The current session is closing";
315 case NGHTTP2_ERR_HTTP_HEADER:
316 return "Invalid HTTP header field was received";
317 case NGHTTP2_ERR_HTTP_MESSAGING:
318 return "Violation in HTTP messaging rule";
319 case NGHTTP2_ERR_REFUSED_STREAM:
320 return "Stream was refused";
321 case NGHTTP2_ERR_INTERNAL:
322 return "Internal error";
323 case NGHTTP2_ERR_CANCEL:
324 return "Cancel";
325 case NGHTTP2_ERR_SETTINGS_EXPECTED:
326 return "When a local endpoint expects to receive SETTINGS frame, it "
327 "receives an other type of frame";
328 case NGHTTP2_ERR_NOMEM:
329 return "Out of memory";
330 case NGHTTP2_ERR_CALLBACK_FAILURE:
331 return "The user callback function failed";
332 case NGHTTP2_ERR_BAD_CLIENT_MAGIC:
333 return "Received bad client magic byte string";
334 case NGHTTP2_ERR_FLOODED:
335 return "Flooding was detected in this HTTP/2 session, and it must be "
336 "closed";
337 case NGHTTP2_ERR_TOO_MANY_SETTINGS:
338 return "SETTINGS frame contained more than the maximum allowed entries";
339 default:
340 return "Unknown error code";
341 }
342 }
343
344 /* Generated by gennmchartbl.py */
345 static const int VALID_HD_NAME_CHARS[] = {
346 0 /* NUL */, 0 /* SOH */, 0 /* STX */, 0 /* ETX */,
347 0 /* EOT */, 0 /* ENQ */, 0 /* ACK */, 0 /* BEL */,
348 0 /* BS */, 0 /* HT */, 0 /* LF */, 0 /* VT */,
349 0 /* FF */, 0 /* CR */, 0 /* SO */, 0 /* SI */,
350 0 /* DLE */, 0 /* DC1 */, 0 /* DC2 */, 0 /* DC3 */,
351 0 /* DC4 */, 0 /* NAK */, 0 /* SYN */, 0 /* ETB */,
352 0 /* CAN */, 0 /* EM */, 0 /* SUB */, 0 /* ESC */,
353 0 /* FS */, 0 /* GS */, 0 /* RS */, 0 /* US */,
354 0 /* SPC */, 1 /* ! */, 0 /* " */, 1 /* # */,
355 1 /* $ */, 1 /* % */, 1 /* & */, 1 /* ' */,
356 0 /* ( */, 0 /* ) */, 1 /* * */, 1 /* + */,
357 0 /* , */, 1 /* - */, 1 /* . */, 0 /* / */,
358 1 /* 0 */, 1 /* 1 */, 1 /* 2 */, 1 /* 3 */,
359 1 /* 4 */, 1 /* 5 */, 1 /* 6 */, 1 /* 7 */,
360 1 /* 8 */, 1 /* 9 */, 0 /* : */, 0 /* ; */,
361 0 /* < */, 0 /* = */, 0 /* > */, 0 /* ? */,
362 0 /* @ */, 0 /* A */, 0 /* B */, 0 /* C */,
363 0 /* D */, 0 /* E */, 0 /* F */, 0 /* G */,
364 0 /* H */, 0 /* I */, 0 /* J */, 0 /* K */,
365 0 /* L */, 0 /* M */, 0 /* N */, 0 /* O */,
366 0 /* P */, 0 /* Q */, 0 /* R */, 0 /* S */,
367 0 /* T */, 0 /* U */, 0 /* V */, 0 /* W */,
368 0 /* X */, 0 /* Y */, 0 /* Z */, 0 /* [ */,
369 0 /* \ */, 0 /* ] */, 1 /* ^ */, 1 /* _ */,
370 1 /* ` */, 1 /* a */, 1 /* b */, 1 /* c */,
371 1 /* d */, 1 /* e */, 1 /* f */, 1 /* g */,
372 1 /* h */, 1 /* i */, 1 /* j */, 1 /* k */,
373 1 /* l */, 1 /* m */, 1 /* n */, 1 /* o */,
374 1 /* p */, 1 /* q */, 1 /* r */, 1 /* s */,
375 1 /* t */, 1 /* u */, 1 /* v */, 1 /* w */,
376 1 /* x */, 1 /* y */, 1 /* z */, 0 /* { */,
377 1 /* | */, 0 /* } */, 1 /* ~ */, 0 /* DEL */,
378 0 /* 0x80 */, 0 /* 0x81 */, 0 /* 0x82 */, 0 /* 0x83 */,
379 0 /* 0x84 */, 0 /* 0x85 */, 0 /* 0x86 */, 0 /* 0x87 */,
380 0 /* 0x88 */, 0 /* 0x89 */, 0 /* 0x8a */, 0 /* 0x8b */,
381 0 /* 0x8c */, 0 /* 0x8d */, 0 /* 0x8e */, 0 /* 0x8f */,
382 0 /* 0x90 */, 0 /* 0x91 */, 0 /* 0x92 */, 0 /* 0x93 */,
383 0 /* 0x94 */, 0 /* 0x95 */, 0 /* 0x96 */, 0 /* 0x97 */,
384 0 /* 0x98 */, 0 /* 0x99 */, 0 /* 0x9a */, 0 /* 0x9b */,
385 0 /* 0x9c */, 0 /* 0x9d */, 0 /* 0x9e */, 0 /* 0x9f */,
386 0 /* 0xa0 */, 0 /* 0xa1 */, 0 /* 0xa2 */, 0 /* 0xa3 */,
387 0 /* 0xa4 */, 0 /* 0xa5 */, 0 /* 0xa6 */, 0 /* 0xa7 */,
388 0 /* 0xa8 */, 0 /* 0xa9 */, 0 /* 0xaa */, 0 /* 0xab */,
389 0 /* 0xac */, 0 /* 0xad */, 0 /* 0xae */, 0 /* 0xaf */,
390 0 /* 0xb0 */, 0 /* 0xb1 */, 0 /* 0xb2 */, 0 /* 0xb3 */,
391 0 /* 0xb4 */, 0 /* 0xb5 */, 0 /* 0xb6 */, 0 /* 0xb7 */,
392 0 /* 0xb8 */, 0 /* 0xb9 */, 0 /* 0xba */, 0 /* 0xbb */,
393 0 /* 0xbc */, 0 /* 0xbd */, 0 /* 0xbe */, 0 /* 0xbf */,
394 0 /* 0xc0 */, 0 /* 0xc1 */, 0 /* 0xc2 */, 0 /* 0xc3 */,
395 0 /* 0xc4 */, 0 /* 0xc5 */, 0 /* 0xc6 */, 0 /* 0xc7 */,
396 0 /* 0xc8 */, 0 /* 0xc9 */, 0 /* 0xca */, 0 /* 0xcb */,
397 0 /* 0xcc */, 0 /* 0xcd */, 0 /* 0xce */, 0 /* 0xcf */,
398 0 /* 0xd0 */, 0 /* 0xd1 */, 0 /* 0xd2 */, 0 /* 0xd3 */,
399 0 /* 0xd4 */, 0 /* 0xd5 */, 0 /* 0xd6 */, 0 /* 0xd7 */,
400 0 /* 0xd8 */, 0 /* 0xd9 */, 0 /* 0xda */, 0 /* 0xdb */,
401 0 /* 0xdc */, 0 /* 0xdd */, 0 /* 0xde */, 0 /* 0xdf */,
402 0 /* 0xe0 */, 0 /* 0xe1 */, 0 /* 0xe2 */, 0 /* 0xe3 */,
403 0 /* 0xe4 */, 0 /* 0xe5 */, 0 /* 0xe6 */, 0 /* 0xe7 */,
404 0 /* 0xe8 */, 0 /* 0xe9 */, 0 /* 0xea */, 0 /* 0xeb */,
405 0 /* 0xec */, 0 /* 0xed */, 0 /* 0xee */, 0 /* 0xef */,
406 0 /* 0xf0 */, 0 /* 0xf1 */, 0 /* 0xf2 */, 0 /* 0xf3 */,
407 0 /* 0xf4 */, 0 /* 0xf5 */, 0 /* 0xf6 */, 0 /* 0xf7 */,
408 0 /* 0xf8 */, 0 /* 0xf9 */, 0 /* 0xfa */, 0 /* 0xfb */,
409 0 /* 0xfc */, 0 /* 0xfd */, 0 /* 0xfe */, 0 /* 0xff */
410 };
411
nghttp2_check_header_name(const uint8_t * name,size_t len)412 int nghttp2_check_header_name(const uint8_t *name, size_t len) {
413 const uint8_t *last;
414 if (len == 0) {
415 return 0;
416 }
417 if (*name == ':') {
418 if (len == 1) {
419 return 0;
420 }
421 ++name;
422 --len;
423 }
424 for (last = name + len; name != last; ++name) {
425 if (!VALID_HD_NAME_CHARS[*name]) {
426 return 0;
427 }
428 }
429 return 1;
430 }
431
432 /* Generated by genvchartbl.py */
433 static const int VALID_HD_VALUE_CHARS[] = {
434 0 /* NUL */, 0 /* SOH */, 0 /* STX */, 0 /* ETX */,
435 0 /* EOT */, 0 /* ENQ */, 0 /* ACK */, 0 /* BEL */,
436 0 /* BS */, 1 /* HT */, 0 /* LF */, 0 /* VT */,
437 0 /* FF */, 0 /* CR */, 0 /* SO */, 0 /* SI */,
438 0 /* DLE */, 0 /* DC1 */, 0 /* DC2 */, 0 /* DC3 */,
439 0 /* DC4 */, 0 /* NAK */, 0 /* SYN */, 0 /* ETB */,
440 0 /* CAN */, 0 /* EM */, 0 /* SUB */, 0 /* ESC */,
441 0 /* FS */, 0 /* GS */, 0 /* RS */, 0 /* US */,
442 1 /* SPC */, 1 /* ! */, 1 /* " */, 1 /* # */,
443 1 /* $ */, 1 /* % */, 1 /* & */, 1 /* ' */,
444 1 /* ( */, 1 /* ) */, 1 /* * */, 1 /* + */,
445 1 /* , */, 1 /* - */, 1 /* . */, 1 /* / */,
446 1 /* 0 */, 1 /* 1 */, 1 /* 2 */, 1 /* 3 */,
447 1 /* 4 */, 1 /* 5 */, 1 /* 6 */, 1 /* 7 */,
448 1 /* 8 */, 1 /* 9 */, 1 /* : */, 1 /* ; */,
449 1 /* < */, 1 /* = */, 1 /* > */, 1 /* ? */,
450 1 /* @ */, 1 /* A */, 1 /* B */, 1 /* C */,
451 1 /* D */, 1 /* E */, 1 /* F */, 1 /* G */,
452 1 /* H */, 1 /* I */, 1 /* J */, 1 /* K */,
453 1 /* L */, 1 /* M */, 1 /* N */, 1 /* O */,
454 1 /* P */, 1 /* Q */, 1 /* R */, 1 /* S */,
455 1 /* T */, 1 /* U */, 1 /* V */, 1 /* W */,
456 1 /* X */, 1 /* Y */, 1 /* Z */, 1 /* [ */,
457 1 /* \ */, 1 /* ] */, 1 /* ^ */, 1 /* _ */,
458 1 /* ` */, 1 /* a */, 1 /* b */, 1 /* c */,
459 1 /* d */, 1 /* e */, 1 /* f */, 1 /* g */,
460 1 /* h */, 1 /* i */, 1 /* j */, 1 /* k */,
461 1 /* l */, 1 /* m */, 1 /* n */, 1 /* o */,
462 1 /* p */, 1 /* q */, 1 /* r */, 1 /* s */,
463 1 /* t */, 1 /* u */, 1 /* v */, 1 /* w */,
464 1 /* x */, 1 /* y */, 1 /* z */, 1 /* { */,
465 1 /* | */, 1 /* } */, 1 /* ~ */, 0 /* DEL */,
466 1 /* 0x80 */, 1 /* 0x81 */, 1 /* 0x82 */, 1 /* 0x83 */,
467 1 /* 0x84 */, 1 /* 0x85 */, 1 /* 0x86 */, 1 /* 0x87 */,
468 1 /* 0x88 */, 1 /* 0x89 */, 1 /* 0x8a */, 1 /* 0x8b */,
469 1 /* 0x8c */, 1 /* 0x8d */, 1 /* 0x8e */, 1 /* 0x8f */,
470 1 /* 0x90 */, 1 /* 0x91 */, 1 /* 0x92 */, 1 /* 0x93 */,
471 1 /* 0x94 */, 1 /* 0x95 */, 1 /* 0x96 */, 1 /* 0x97 */,
472 1 /* 0x98 */, 1 /* 0x99 */, 1 /* 0x9a */, 1 /* 0x9b */,
473 1 /* 0x9c */, 1 /* 0x9d */, 1 /* 0x9e */, 1 /* 0x9f */,
474 1 /* 0xa0 */, 1 /* 0xa1 */, 1 /* 0xa2 */, 1 /* 0xa3 */,
475 1 /* 0xa4 */, 1 /* 0xa5 */, 1 /* 0xa6 */, 1 /* 0xa7 */,
476 1 /* 0xa8 */, 1 /* 0xa9 */, 1 /* 0xaa */, 1 /* 0xab */,
477 1 /* 0xac */, 1 /* 0xad */, 1 /* 0xae */, 1 /* 0xaf */,
478 1 /* 0xb0 */, 1 /* 0xb1 */, 1 /* 0xb2 */, 1 /* 0xb3 */,
479 1 /* 0xb4 */, 1 /* 0xb5 */, 1 /* 0xb6 */, 1 /* 0xb7 */,
480 1 /* 0xb8 */, 1 /* 0xb9 */, 1 /* 0xba */, 1 /* 0xbb */,
481 1 /* 0xbc */, 1 /* 0xbd */, 1 /* 0xbe */, 1 /* 0xbf */,
482 1 /* 0xc0 */, 1 /* 0xc1 */, 1 /* 0xc2 */, 1 /* 0xc3 */,
483 1 /* 0xc4 */, 1 /* 0xc5 */, 1 /* 0xc6 */, 1 /* 0xc7 */,
484 1 /* 0xc8 */, 1 /* 0xc9 */, 1 /* 0xca */, 1 /* 0xcb */,
485 1 /* 0xcc */, 1 /* 0xcd */, 1 /* 0xce */, 1 /* 0xcf */,
486 1 /* 0xd0 */, 1 /* 0xd1 */, 1 /* 0xd2 */, 1 /* 0xd3 */,
487 1 /* 0xd4 */, 1 /* 0xd5 */, 1 /* 0xd6 */, 1 /* 0xd7 */,
488 1 /* 0xd8 */, 1 /* 0xd9 */, 1 /* 0xda */, 1 /* 0xdb */,
489 1 /* 0xdc */, 1 /* 0xdd */, 1 /* 0xde */, 1 /* 0xdf */,
490 1 /* 0xe0 */, 1 /* 0xe1 */, 1 /* 0xe2 */, 1 /* 0xe3 */,
491 1 /* 0xe4 */, 1 /* 0xe5 */, 1 /* 0xe6 */, 1 /* 0xe7 */,
492 1 /* 0xe8 */, 1 /* 0xe9 */, 1 /* 0xea */, 1 /* 0xeb */,
493 1 /* 0xec */, 1 /* 0xed */, 1 /* 0xee */, 1 /* 0xef */,
494 1 /* 0xf0 */, 1 /* 0xf1 */, 1 /* 0xf2 */, 1 /* 0xf3 */,
495 1 /* 0xf4 */, 1 /* 0xf5 */, 1 /* 0xf6 */, 1 /* 0xf7 */,
496 1 /* 0xf8 */, 1 /* 0xf9 */, 1 /* 0xfa */, 1 /* 0xfb */,
497 1 /* 0xfc */, 1 /* 0xfd */, 1 /* 0xfe */, 1 /* 0xff */
498 };
499
nghttp2_check_header_value(const uint8_t * value,size_t len)500 int nghttp2_check_header_value(const uint8_t *value, size_t len) {
501 const uint8_t *last;
502 for (last = value + len; value != last; ++value) {
503 if (!VALID_HD_VALUE_CHARS[*value]) {
504 return 0;
505 }
506 }
507 return 1;
508 }
509
510 /* Generated by genauthroitychartbl.py */
511 static char VALID_AUTHORITY_CHARS[] = {
512 0 /* NUL */, 0 /* SOH */, 0 /* STX */, 0 /* ETX */,
513 0 /* EOT */, 0 /* ENQ */, 0 /* ACK */, 0 /* BEL */,
514 0 /* BS */, 0 /* HT */, 0 /* LF */, 0 /* VT */,
515 0 /* FF */, 0 /* CR */, 0 /* SO */, 0 /* SI */,
516 0 /* DLE */, 0 /* DC1 */, 0 /* DC2 */, 0 /* DC3 */,
517 0 /* DC4 */, 0 /* NAK */, 0 /* SYN */, 0 /* ETB */,
518 0 /* CAN */, 0 /* EM */, 0 /* SUB */, 0 /* ESC */,
519 0 /* FS */, 0 /* GS */, 0 /* RS */, 0 /* US */,
520 0 /* SPC */, 1 /* ! */, 0 /* " */, 0 /* # */,
521 1 /* $ */, 1 /* % */, 1 /* & */, 1 /* ' */,
522 1 /* ( */, 1 /* ) */, 1 /* * */, 1 /* + */,
523 1 /* , */, 1 /* - */, 1 /* . */, 0 /* / */,
524 1 /* 0 */, 1 /* 1 */, 1 /* 2 */, 1 /* 3 */,
525 1 /* 4 */, 1 /* 5 */, 1 /* 6 */, 1 /* 7 */,
526 1 /* 8 */, 1 /* 9 */, 1 /* : */, 1 /* ; */,
527 0 /* < */, 1 /* = */, 0 /* > */, 0 /* ? */,
528 1 /* @ */, 1 /* A */, 1 /* B */, 1 /* C */,
529 1 /* D */, 1 /* E */, 1 /* F */, 1 /* G */,
530 1 /* H */, 1 /* I */, 1 /* J */, 1 /* K */,
531 1 /* L */, 1 /* M */, 1 /* N */, 1 /* O */,
532 1 /* P */, 1 /* Q */, 1 /* R */, 1 /* S */,
533 1 /* T */, 1 /* U */, 1 /* V */, 1 /* W */,
534 1 /* X */, 1 /* Y */, 1 /* Z */, 1 /* [ */,
535 0 /* \ */, 1 /* ] */, 0 /* ^ */, 1 /* _ */,
536 0 /* ` */, 1 /* a */, 1 /* b */, 1 /* c */,
537 1 /* d */, 1 /* e */, 1 /* f */, 1 /* g */,
538 1 /* h */, 1 /* i */, 1 /* j */, 1 /* k */,
539 1 /* l */, 1 /* m */, 1 /* n */, 1 /* o */,
540 1 /* p */, 1 /* q */, 1 /* r */, 1 /* s */,
541 1 /* t */, 1 /* u */, 1 /* v */, 1 /* w */,
542 1 /* x */, 1 /* y */, 1 /* z */, 0 /* { */,
543 0 /* | */, 0 /* } */, 1 /* ~ */, 0 /* DEL */,
544 0 /* 0x80 */, 0 /* 0x81 */, 0 /* 0x82 */, 0 /* 0x83 */,
545 0 /* 0x84 */, 0 /* 0x85 */, 0 /* 0x86 */, 0 /* 0x87 */,
546 0 /* 0x88 */, 0 /* 0x89 */, 0 /* 0x8a */, 0 /* 0x8b */,
547 0 /* 0x8c */, 0 /* 0x8d */, 0 /* 0x8e */, 0 /* 0x8f */,
548 0 /* 0x90 */, 0 /* 0x91 */, 0 /* 0x92 */, 0 /* 0x93 */,
549 0 /* 0x94 */, 0 /* 0x95 */, 0 /* 0x96 */, 0 /* 0x97 */,
550 0 /* 0x98 */, 0 /* 0x99 */, 0 /* 0x9a */, 0 /* 0x9b */,
551 0 /* 0x9c */, 0 /* 0x9d */, 0 /* 0x9e */, 0 /* 0x9f */,
552 0 /* 0xa0 */, 0 /* 0xa1 */, 0 /* 0xa2 */, 0 /* 0xa3 */,
553 0 /* 0xa4 */, 0 /* 0xa5 */, 0 /* 0xa6 */, 0 /* 0xa7 */,
554 0 /* 0xa8 */, 0 /* 0xa9 */, 0 /* 0xaa */, 0 /* 0xab */,
555 0 /* 0xac */, 0 /* 0xad */, 0 /* 0xae */, 0 /* 0xaf */,
556 0 /* 0xb0 */, 0 /* 0xb1 */, 0 /* 0xb2 */, 0 /* 0xb3 */,
557 0 /* 0xb4 */, 0 /* 0xb5 */, 0 /* 0xb6 */, 0 /* 0xb7 */,
558 0 /* 0xb8 */, 0 /* 0xb9 */, 0 /* 0xba */, 0 /* 0xbb */,
559 0 /* 0xbc */, 0 /* 0xbd */, 0 /* 0xbe */, 0 /* 0xbf */,
560 0 /* 0xc0 */, 0 /* 0xc1 */, 0 /* 0xc2 */, 0 /* 0xc3 */,
561 0 /* 0xc4 */, 0 /* 0xc5 */, 0 /* 0xc6 */, 0 /* 0xc7 */,
562 0 /* 0xc8 */, 0 /* 0xc9 */, 0 /* 0xca */, 0 /* 0xcb */,
563 0 /* 0xcc */, 0 /* 0xcd */, 0 /* 0xce */, 0 /* 0xcf */,
564 0 /* 0xd0 */, 0 /* 0xd1 */, 0 /* 0xd2 */, 0 /* 0xd3 */,
565 0 /* 0xd4 */, 0 /* 0xd5 */, 0 /* 0xd6 */, 0 /* 0xd7 */,
566 0 /* 0xd8 */, 0 /* 0xd9 */, 0 /* 0xda */, 0 /* 0xdb */,
567 0 /* 0xdc */, 0 /* 0xdd */, 0 /* 0xde */, 0 /* 0xdf */,
568 0 /* 0xe0 */, 0 /* 0xe1 */, 0 /* 0xe2 */, 0 /* 0xe3 */,
569 0 /* 0xe4 */, 0 /* 0xe5 */, 0 /* 0xe6 */, 0 /* 0xe7 */,
570 0 /* 0xe8 */, 0 /* 0xe9 */, 0 /* 0xea */, 0 /* 0xeb */,
571 0 /* 0xec */, 0 /* 0xed */, 0 /* 0xee */, 0 /* 0xef */,
572 0 /* 0xf0 */, 0 /* 0xf1 */, 0 /* 0xf2 */, 0 /* 0xf3 */,
573 0 /* 0xf4 */, 0 /* 0xf5 */, 0 /* 0xf6 */, 0 /* 0xf7 */,
574 0 /* 0xf8 */, 0 /* 0xf9 */, 0 /* 0xfa */, 0 /* 0xfb */,
575 0 /* 0xfc */, 0 /* 0xfd */, 0 /* 0xfe */, 0 /* 0xff */
576 };
577
nghttp2_check_authority(const uint8_t * value,size_t len)578 int nghttp2_check_authority(const uint8_t *value, size_t len) {
579 const uint8_t *last;
580 for (last = value + len; value != last; ++value) {
581 if (!VALID_AUTHORITY_CHARS[*value]) {
582 return 0;
583 }
584 }
585 return 1;
586 }
587
nghttp2_cpymem(uint8_t * dest,const void * src,size_t len)588 uint8_t *nghttp2_cpymem(uint8_t *dest, const void *src, size_t len) {
589 if (len == 0) {
590 return dest;
591 }
592
593 memcpy(dest, src, len);
594
595 return dest + len;
596 }
597
nghttp2_http2_strerror(uint32_t error_code)598 const char *nghttp2_http2_strerror(uint32_t error_code) {
599 switch (error_code) {
600 case NGHTTP2_NO_ERROR:
601 return "NO_ERROR";
602 case NGHTTP2_PROTOCOL_ERROR:
603 return "PROTOCOL_ERROR";
604 case NGHTTP2_INTERNAL_ERROR:
605 return "INTERNAL_ERROR";
606 case NGHTTP2_FLOW_CONTROL_ERROR:
607 return "FLOW_CONTROL_ERROR";
608 case NGHTTP2_SETTINGS_TIMEOUT:
609 return "SETTINGS_TIMEOUT";
610 case NGHTTP2_STREAM_CLOSED:
611 return "STREAM_CLOSED";
612 case NGHTTP2_FRAME_SIZE_ERROR:
613 return "FRAME_SIZE_ERROR";
614 case NGHTTP2_REFUSED_STREAM:
615 return "REFUSED_STREAM";
616 case NGHTTP2_CANCEL:
617 return "CANCEL";
618 case NGHTTP2_COMPRESSION_ERROR:
619 return "COMPRESSION_ERROR";
620 case NGHTTP2_CONNECT_ERROR:
621 return "CONNECT_ERROR";
622 case NGHTTP2_ENHANCE_YOUR_CALM:
623 return "ENHANCE_YOUR_CALM";
624 case NGHTTP2_INADEQUATE_SECURITY:
625 return "INADEQUATE_SECURITY";
626 case NGHTTP2_HTTP_1_1_REQUIRED:
627 return "HTTP_1_1_REQUIRED";
628 default:
629 return "unknown";
630 }
631 }
632