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 {
34 uint16_t x = nghttp2_htons(n);
35 memcpy(buf, &x, sizeof(uint16_t));
36 }
37
nghttp2_put_uint32be(uint8_t * buf,uint32_t n)38 void nghttp2_put_uint32be(uint8_t *buf, uint32_t n)
39 {
40 uint32_t x = nghttp2_htonl(n);
41 memcpy(buf, &x, sizeof(uint32_t));
42 }
43
nghttp2_get_uint16(const uint8_t * data)44 uint16_t nghttp2_get_uint16(const uint8_t *data)
45 {
46 uint16_t n;
47 memcpy(&n, data, sizeof(uint16_t));
48 return nghttp2_ntohs(n);
49 }
50
nghttp2_get_uint32(const uint8_t * data)51 uint32_t nghttp2_get_uint32(const uint8_t *data)
52 {
53 uint32_t n;
54 memcpy(&n, data, sizeof(uint32_t));
55 return nghttp2_ntohl(n);
56 }
57
58 /* Generated by gendowncasetbl.py */
59 static const uint8_t DOWNCASE_TBL[] = {
60 0 /* NUL */, 1 /* SOH */, 2 /* STX */, 3 /* ETX */,
61 4 /* EOT */, 5 /* ENQ */, 6 /* ACK */, 7 /* BEL */,
62 8 /* BS */, 9 /* HT */, 10 /* LF */, 11 /* VT */,
63 12 /* FF */, 13 /* CR */, 14 /* SO */, 15 /* SI */,
64 16 /* DLE */, 17 /* DC1 */, 18 /* DC2 */, 19 /* DC3 */,
65 20 /* DC4 */, 21 /* NAK */, 22 /* SYN */, 23 /* ETB */,
66 24 /* CAN */, 25 /* EM */, 26 /* SUB */, 27 /* ESC */,
67 28 /* FS */, 29 /* GS */, 30 /* RS */, 31 /* US */,
68 32 /* SPC */, 33 /* ! */, 34 /* " */, 35 /* # */,
69 36 /* $ */, 37 /* % */, 38 /* & */, 39 /* ' */,
70 40 /* ( */, 41 /* ) */, 42 /* * */, 43 /* + */,
71 44 /* , */, 45 /* - */, 46 /* . */, 47 /* / */,
72 48 /* 0 */, 49 /* 1 */, 50 /* 2 */, 51 /* 3 */,
73 52 /* 4 */, 53 /* 5 */, 54 /* 6 */, 55 /* 7 */,
74 56 /* 8 */, 57 /* 9 */, 58 /* : */, 59 /* ; */,
75 60 /* < */, 61 /* = */, 62 /* > */, 63 /* ? */,
76 64 /* @ */, 97 /* A */, 98 /* B */, 99 /* C */,
77 100 /* D */, 101 /* E */, 102 /* F */, 103 /* G */,
78 104 /* H */, 105 /* I */, 106 /* J */, 107 /* K */,
79 108 /* L */, 109 /* M */, 110 /* N */, 111 /* O */,
80 112 /* P */, 113 /* Q */, 114 /* R */, 115 /* S */,
81 116 /* T */, 117 /* U */, 118 /* V */, 119 /* W */,
82 120 /* X */, 121 /* Y */, 122 /* Z */, 91 /* [ */,
83 92 /* \ */, 93 /* ] */, 94 /* ^ */, 95 /* _ */,
84 96 /* ` */, 97 /* a */, 98 /* b */, 99 /* c */,
85 100 /* d */, 101 /* e */, 102 /* f */, 103 /* g */,
86 104 /* h */, 105 /* i */, 106 /* j */, 107 /* k */,
87 108 /* l */, 109 /* m */, 110 /* n */, 111 /* o */,
88 112 /* p */, 113 /* q */, 114 /* r */, 115 /* s */,
89 116 /* t */, 117 /* u */, 118 /* v */, 119 /* w */,
90 120 /* x */, 121 /* y */, 122 /* z */, 123 /* { */,
91 124 /* | */, 125 /* } */, 126 /* ~ */, 127 /* DEL */,
92 128 /* 0x80 */, 129 /* 0x81 */, 130 /* 0x82 */, 131 /* 0x83 */,
93 132 /* 0x84 */, 133 /* 0x85 */, 134 /* 0x86 */, 135 /* 0x87 */,
94 136 /* 0x88 */, 137 /* 0x89 */, 138 /* 0x8a */, 139 /* 0x8b */,
95 140 /* 0x8c */, 141 /* 0x8d */, 142 /* 0x8e */, 143 /* 0x8f */,
96 144 /* 0x90 */, 145 /* 0x91 */, 146 /* 0x92 */, 147 /* 0x93 */,
97 148 /* 0x94 */, 149 /* 0x95 */, 150 /* 0x96 */, 151 /* 0x97 */,
98 152 /* 0x98 */, 153 /* 0x99 */, 154 /* 0x9a */, 155 /* 0x9b */,
99 156 /* 0x9c */, 157 /* 0x9d */, 158 /* 0x9e */, 159 /* 0x9f */,
100 160 /* 0xa0 */, 161 /* 0xa1 */, 162 /* 0xa2 */, 163 /* 0xa3 */,
101 164 /* 0xa4 */, 165 /* 0xa5 */, 166 /* 0xa6 */, 167 /* 0xa7 */,
102 168 /* 0xa8 */, 169 /* 0xa9 */, 170 /* 0xaa */, 171 /* 0xab */,
103 172 /* 0xac */, 173 /* 0xad */, 174 /* 0xae */, 175 /* 0xaf */,
104 176 /* 0xb0 */, 177 /* 0xb1 */, 178 /* 0xb2 */, 179 /* 0xb3 */,
105 180 /* 0xb4 */, 181 /* 0xb5 */, 182 /* 0xb6 */, 183 /* 0xb7 */,
106 184 /* 0xb8 */, 185 /* 0xb9 */, 186 /* 0xba */, 187 /* 0xbb */,
107 188 /* 0xbc */, 189 /* 0xbd */, 190 /* 0xbe */, 191 /* 0xbf */,
108 192 /* 0xc0 */, 193 /* 0xc1 */, 194 /* 0xc2 */, 195 /* 0xc3 */,
109 196 /* 0xc4 */, 197 /* 0xc5 */, 198 /* 0xc6 */, 199 /* 0xc7 */,
110 200 /* 0xc8 */, 201 /* 0xc9 */, 202 /* 0xca */, 203 /* 0xcb */,
111 204 /* 0xcc */, 205 /* 0xcd */, 206 /* 0xce */, 207 /* 0xcf */,
112 208 /* 0xd0 */, 209 /* 0xd1 */, 210 /* 0xd2 */, 211 /* 0xd3 */,
113 212 /* 0xd4 */, 213 /* 0xd5 */, 214 /* 0xd6 */, 215 /* 0xd7 */,
114 216 /* 0xd8 */, 217 /* 0xd9 */, 218 /* 0xda */, 219 /* 0xdb */,
115 220 /* 0xdc */, 221 /* 0xdd */, 222 /* 0xde */, 223 /* 0xdf */,
116 224 /* 0xe0 */, 225 /* 0xe1 */, 226 /* 0xe2 */, 227 /* 0xe3 */,
117 228 /* 0xe4 */, 229 /* 0xe5 */, 230 /* 0xe6 */, 231 /* 0xe7 */,
118 232 /* 0xe8 */, 233 /* 0xe9 */, 234 /* 0xea */, 235 /* 0xeb */,
119 236 /* 0xec */, 237 /* 0xed */, 238 /* 0xee */, 239 /* 0xef */,
120 240 /* 0xf0 */, 241 /* 0xf1 */, 242 /* 0xf2 */, 243 /* 0xf3 */,
121 244 /* 0xf4 */, 245 /* 0xf5 */, 246 /* 0xf6 */, 247 /* 0xf7 */,
122 248 /* 0xf8 */, 249 /* 0xf9 */, 250 /* 0xfa */, 251 /* 0xfb */,
123 252 /* 0xfc */, 253 /* 0xfd */, 254 /* 0xfe */, 255 /* 0xff */,
124 };
125
nghttp2_downcase(uint8_t * s,size_t len)126 void nghttp2_downcase(uint8_t *s, size_t len)
127 {
128 size_t i;
129 for (i = 0; i < len; ++i) {
130 s[i] = DOWNCASE_TBL[s[i]];
131 }
132 }
133
134 /*
135 * local_window_size
136 * ^ *
137 * | * recv_window_size
138 * | * * ^
139 * | * * |
140 * 0+++++++++
141 * | * * \
142 * | * * | This rage is hidden in flow control. But it must be
143 * v * * / kept in order to restore it when window size is enlarged.
144 * recv_reduction
145 * (+ for negative direction)
146 *
147 * recv_window_size could be negative if we decrease
148 * local_window_size more than recv_window_size:
149 *
150 * local_window_size
151 * ^ *
152 * | *
153 * | *
154 * 0++++++++
155 * | * ^ recv_window_size (negative)
156 * | * |
157 * v * *
158 * recv_reduction
159 */
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)160 int nghttp2_adjust_local_window_size(int32_t *local_window_size_ptr,
161 int32_t *recv_window_size_ptr,
162 int32_t *recv_reduction_ptr,
163 int32_t *delta_ptr)
164 {
165 if (*delta_ptr > 0) {
166 int32_t recv_reduction_delta;
167 int32_t delta;
168 int32_t new_recv_window_size =
169 nghttp2_max(0, *recv_window_size_ptr) - *delta_ptr;
170
171 if (new_recv_window_size >= 0) {
172 *recv_window_size_ptr = new_recv_window_size;
173 return 0;
174 }
175
176 delta = -new_recv_window_size;
177
178 /* The delta size is strictly more than received bytes. Increase
179 local_window_size by that difference |delta|. */
180 if (*local_window_size_ptr > NGHTTP2_MAX_WINDOW_SIZE - delta) {
181 return NGHTTP2_ERR_FLOW_CONTROL;
182 }
183 *local_window_size_ptr += delta;
184 /* If there is recv_reduction due to earlier window_size
185 reduction, we have to adjust it too. */
186 recv_reduction_delta = nghttp2_min(*recv_reduction_ptr, delta);
187 *recv_reduction_ptr -= recv_reduction_delta;
188 if (*recv_window_size_ptr < 0) {
189 *recv_window_size_ptr += recv_reduction_delta;
190 } else {
191 /* If *recv_window_size_ptr > 0, then those bytes are going to
192 be returned to the remote peer (by WINDOW_UPDATE with the
193 adjusted *delta_ptr), so it is effectively 0 now. We set to
194 *recv_reduction_delta, because caller does not take into
195 account it in *delta_ptr. */
196 *recv_window_size_ptr = recv_reduction_delta;
197 }
198 /* recv_reduction_delta must be paid from *delta_ptr, since it was
199 added in window size reduction (see below). */
200 *delta_ptr -= recv_reduction_delta;
201
202 return 0;
203 }
204
205 if (*local_window_size_ptr + *delta_ptr < 0 ||
206 *recv_window_size_ptr < INT32_MIN - *delta_ptr ||
207 *recv_reduction_ptr > INT32_MAX + *delta_ptr) {
208 return NGHTTP2_ERR_FLOW_CONTROL;
209 }
210 /* Decreasing local window size. Note that we achieve this without
211 noticing to the remote peer. To do this, we cut
212 recv_window_size by -delta. This means that we don't send
213 WINDOW_UPDATE for -delta bytes. */
214 *local_window_size_ptr += *delta_ptr;
215 *recv_window_size_ptr += *delta_ptr;
216 *recv_reduction_ptr -= *delta_ptr;
217 *delta_ptr = 0;
218
219 return 0;
220 }
221
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)222 int nghttp2_increase_local_window_size(int32_t *local_window_size_ptr,
223 int32_t *recv_window_size_ptr,
224 int32_t *recv_reduction_ptr,
225 int32_t *delta_ptr)
226 {
227 int32_t recv_reduction_delta;
228 int32_t delta;
229
230 delta = *delta_ptr;
231
232 assert(delta >= 0);
233
234 /* The delta size is strictly more than received bytes. Increase
235 local_window_size by that difference |delta|. */
236 if (*local_window_size_ptr > NGHTTP2_MAX_WINDOW_SIZE - delta) {
237 return NGHTTP2_ERR_FLOW_CONTROL;
238 }
239
240 *local_window_size_ptr += delta;
241 /* If there is recv_reduction due to earlier window_size
242 reduction, we have to adjust it too. */
243 recv_reduction_delta = nghttp2_min(*recv_reduction_ptr, delta);
244 *recv_reduction_ptr -= recv_reduction_delta;
245
246 *recv_window_size_ptr += recv_reduction_delta;
247
248 /* recv_reduction_delta must be paid from *delta_ptr, since it was
249 added in window size reduction (see below). */
250 *delta_ptr -= recv_reduction_delta;
251
252 return 0;
253 }
254
nghttp2_should_send_window_update(int32_t local_window_size,int32_t recv_window_size)255 int nghttp2_should_send_window_update(int32_t local_window_size,
256 int32_t recv_window_size)
257 {
258 return recv_window_size > 0 && recv_window_size >= local_window_size / 2;
259 }
260
nghttp2_strerror(int error_code)261 const char *nghttp2_strerror(int error_code)
262 {
263 switch (error_code) {
264 case 0:
265 return "Success";
266 case NGHTTP2_ERR_INVALID_ARGUMENT:
267 return "Invalid argument";
268 case NGHTTP2_ERR_BUFFER_ERROR:
269 return "Out of buffer space";
270 case NGHTTP2_ERR_UNSUPPORTED_VERSION:
271 return "Unsupported SPDY version";
272 case NGHTTP2_ERR_WOULDBLOCK:
273 return "Operation would block";
274 case NGHTTP2_ERR_PROTO:
275 return "Protocol error";
276 case NGHTTP2_ERR_INVALID_FRAME:
277 return "Invalid frame octets";
278 case NGHTTP2_ERR_EOF:
279 return "EOF";
280 case NGHTTP2_ERR_DEFERRED:
281 return "Data transfer deferred";
282 case NGHTTP2_ERR_STREAM_ID_NOT_AVAILABLE:
283 return "No more Stream ID available";
284 case NGHTTP2_ERR_STREAM_CLOSED:
285 return "Stream was already closed or invalid";
286 case NGHTTP2_ERR_STREAM_CLOSING:
287 return "Stream is closing";
288 case NGHTTP2_ERR_STREAM_SHUT_WR:
289 return "The transmission is not allowed for this stream";
290 case NGHTTP2_ERR_INVALID_STREAM_ID:
291 return "Stream ID is invalid";
292 case NGHTTP2_ERR_INVALID_STREAM_STATE:
293 return "Invalid stream state";
294 case NGHTTP2_ERR_DEFERRED_DATA_EXIST:
295 return "Another DATA frame has already been deferred";
296 case NGHTTP2_ERR_START_STREAM_NOT_ALLOWED:
297 return "request HEADERS is not allowed";
298 case NGHTTP2_ERR_GOAWAY_ALREADY_SENT:
299 return "GOAWAY has already been sent";
300 case NGHTTP2_ERR_INVALID_HEADER_BLOCK:
301 return "Invalid header block";
302 case NGHTTP2_ERR_INVALID_STATE:
303 return "Invalid state";
304 case NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE:
305 return "The user callback function failed due to the temporal error";
306 case NGHTTP2_ERR_FRAME_SIZE_ERROR:
307 return "The length of the frame is invalid";
308 case NGHTTP2_ERR_HEADER_COMP:
309 return "Header compression/decompression error";
310 case NGHTTP2_ERR_FLOW_CONTROL:
311 return "Flow control error";
312 case NGHTTP2_ERR_INSUFF_BUFSIZE:
313 return "Insufficient buffer size given to function";
314 case NGHTTP2_ERR_PAUSE:
315 return "Callback was paused by the application";
316 case NGHTTP2_ERR_TOO_MANY_INFLIGHT_SETTINGS:
317 return "Too many inflight SETTINGS";
318 case NGHTTP2_ERR_PUSH_DISABLED:
319 return "Server push is disabled by peer";
320 case NGHTTP2_ERR_DATA_EXIST:
321 return "DATA or HEADERS frame has already been submitted for the "
322 "stream";
323 case NGHTTP2_ERR_SESSION_CLOSING:
324 return "The current session is closing";
325 case NGHTTP2_ERR_HTTP_HEADER:
326 return "Invalid HTTP header field was received";
327 case NGHTTP2_ERR_HTTP_MESSAGING:
328 return "Violation in HTTP messaging rule";
329 case NGHTTP2_ERR_REFUSED_STREAM:
330 return "Stream was refused";
331 case NGHTTP2_ERR_INTERNAL:
332 return "Internal error";
333 case NGHTTP2_ERR_CANCEL:
334 return "Cancel";
335 case NGHTTP2_ERR_SETTINGS_EXPECTED:
336 return "When a local endpoint expects to receive SETTINGS frame, it "
337 "receives an other type of frame";
338 case NGHTTP2_ERR_NOMEM:
339 return "Out of memory";
340 case NGHTTP2_ERR_CALLBACK_FAILURE:
341 return "The user callback function failed";
342 case NGHTTP2_ERR_BAD_CLIENT_MAGIC:
343 return "Received bad client magic byte string";
344 case NGHTTP2_ERR_FLOODED:
345 return "Flooding was detected in this HTTP/2 session, and it must be "
346 "closed";
347 default:
348 return "Unknown error code";
349 }
350 }
351
352 /* Generated by gennmchartbl.py */
353 static int VALID_HD_NAME_CHARS[] = {
354 0 /* NUL */, 0 /* SOH */, 0 /* STX */, 0 /* ETX */,
355 0 /* EOT */, 0 /* ENQ */, 0 /* ACK */, 0 /* BEL */,
356 0 /* BS */, 0 /* HT */, 0 /* LF */, 0 /* VT */,
357 0 /* FF */, 0 /* CR */, 0 /* SO */, 0 /* SI */,
358 0 /* DLE */, 0 /* DC1 */, 0 /* DC2 */, 0 /* DC3 */,
359 0 /* DC4 */, 0 /* NAK */, 0 /* SYN */, 0 /* ETB */,
360 0 /* CAN */, 0 /* EM */, 0 /* SUB */, 0 /* ESC */,
361 0 /* FS */, 0 /* GS */, 0 /* RS */, 0 /* US */,
362 0 /* SPC */, 1 /* ! */, 0 /* " */, 1 /* # */,
363 1 /* $ */, 1 /* % */, 1 /* & */, 1 /* ' */,
364 0 /* ( */, 0 /* ) */, 1 /* * */, 1 /* + */,
365 0 /* , */, 1 /* - */, 1 /* . */, 0 /* / */,
366 1 /* 0 */, 1 /* 1 */, 1 /* 2 */, 1 /* 3 */,
367 1 /* 4 */, 1 /* 5 */, 1 /* 6 */, 1 /* 7 */,
368 1 /* 8 */, 1 /* 9 */, 0 /* : */, 0 /* ; */,
369 0 /* < */, 0 /* = */, 0 /* > */, 0 /* ? */,
370 0 /* @ */, 0 /* A */, 0 /* B */, 0 /* C */,
371 0 /* D */, 0 /* E */, 0 /* F */, 0 /* G */,
372 0 /* H */, 0 /* I */, 0 /* J */, 0 /* K */,
373 0 /* L */, 0 /* M */, 0 /* N */, 0 /* O */,
374 0 /* P */, 0 /* Q */, 0 /* R */, 0 /* S */,
375 0 /* T */, 0 /* U */, 0 /* V */, 0 /* W */,
376 0 /* X */, 0 /* Y */, 0 /* Z */, 0 /* [ */,
377 0 /* \ */, 0 /* ] */, 1 /* ^ */, 1 /* _ */,
378 1 /* ` */, 1 /* a */, 1 /* b */, 1 /* c */,
379 1 /* d */, 1 /* e */, 1 /* f */, 1 /* g */,
380 1 /* h */, 1 /* i */, 1 /* j */, 1 /* k */,
381 1 /* l */, 1 /* m */, 1 /* n */, 1 /* o */,
382 1 /* p */, 1 /* q */, 1 /* r */, 1 /* s */,
383 1 /* t */, 1 /* u */, 1 /* v */, 1 /* w */,
384 1 /* x */, 1 /* y */, 1 /* z */, 0 /* { */,
385 1 /* | */, 0 /* } */, 1 /* ~ */, 0 /* DEL */,
386 0 /* 0x80 */, 0 /* 0x81 */, 0 /* 0x82 */, 0 /* 0x83 */,
387 0 /* 0x84 */, 0 /* 0x85 */, 0 /* 0x86 */, 0 /* 0x87 */,
388 0 /* 0x88 */, 0 /* 0x89 */, 0 /* 0x8a */, 0 /* 0x8b */,
389 0 /* 0x8c */, 0 /* 0x8d */, 0 /* 0x8e */, 0 /* 0x8f */,
390 0 /* 0x90 */, 0 /* 0x91 */, 0 /* 0x92 */, 0 /* 0x93 */,
391 0 /* 0x94 */, 0 /* 0x95 */, 0 /* 0x96 */, 0 /* 0x97 */,
392 0 /* 0x98 */, 0 /* 0x99 */, 0 /* 0x9a */, 0 /* 0x9b */,
393 0 /* 0x9c */, 0 /* 0x9d */, 0 /* 0x9e */, 0 /* 0x9f */,
394 0 /* 0xa0 */, 0 /* 0xa1 */, 0 /* 0xa2 */, 0 /* 0xa3 */,
395 0 /* 0xa4 */, 0 /* 0xa5 */, 0 /* 0xa6 */, 0 /* 0xa7 */,
396 0 /* 0xa8 */, 0 /* 0xa9 */, 0 /* 0xaa */, 0 /* 0xab */,
397 0 /* 0xac */, 0 /* 0xad */, 0 /* 0xae */, 0 /* 0xaf */,
398 0 /* 0xb0 */, 0 /* 0xb1 */, 0 /* 0xb2 */, 0 /* 0xb3 */,
399 0 /* 0xb4 */, 0 /* 0xb5 */, 0 /* 0xb6 */, 0 /* 0xb7 */,
400 0 /* 0xb8 */, 0 /* 0xb9 */, 0 /* 0xba */, 0 /* 0xbb */,
401 0 /* 0xbc */, 0 /* 0xbd */, 0 /* 0xbe */, 0 /* 0xbf */,
402 0 /* 0xc0 */, 0 /* 0xc1 */, 0 /* 0xc2 */, 0 /* 0xc3 */,
403 0 /* 0xc4 */, 0 /* 0xc5 */, 0 /* 0xc6 */, 0 /* 0xc7 */,
404 0 /* 0xc8 */, 0 /* 0xc9 */, 0 /* 0xca */, 0 /* 0xcb */,
405 0 /* 0xcc */, 0 /* 0xcd */, 0 /* 0xce */, 0 /* 0xcf */,
406 0 /* 0xd0 */, 0 /* 0xd1 */, 0 /* 0xd2 */, 0 /* 0xd3 */,
407 0 /* 0xd4 */, 0 /* 0xd5 */, 0 /* 0xd6 */, 0 /* 0xd7 */,
408 0 /* 0xd8 */, 0 /* 0xd9 */, 0 /* 0xda */, 0 /* 0xdb */,
409 0 /* 0xdc */, 0 /* 0xdd */, 0 /* 0xde */, 0 /* 0xdf */,
410 0 /* 0xe0 */, 0 /* 0xe1 */, 0 /* 0xe2 */, 0 /* 0xe3 */,
411 0 /* 0xe4 */, 0 /* 0xe5 */, 0 /* 0xe6 */, 0 /* 0xe7 */,
412 0 /* 0xe8 */, 0 /* 0xe9 */, 0 /* 0xea */, 0 /* 0xeb */,
413 0 /* 0xec */, 0 /* 0xed */, 0 /* 0xee */, 0 /* 0xef */,
414 0 /* 0xf0 */, 0 /* 0xf1 */, 0 /* 0xf2 */, 0 /* 0xf3 */,
415 0 /* 0xf4 */, 0 /* 0xf5 */, 0 /* 0xf6 */, 0 /* 0xf7 */,
416 0 /* 0xf8 */, 0 /* 0xf9 */, 0 /* 0xfa */, 0 /* 0xfb */,
417 0 /* 0xfc */, 0 /* 0xfd */, 0 /* 0xfe */, 0 /* 0xff */
418 };
419
nghttp2_check_header_name(const uint8_t * name,size_t len)420 int nghttp2_check_header_name(const uint8_t *name, size_t len)
421 {
422 const uint8_t *last;
423 if (len == 0) {
424 return 0;
425 }
426 if (*name == ':') {
427 if (len == 1) {
428 return 0;
429 }
430 ++name;
431 --len;
432 }
433 for (last = name + len; name != last; ++name) {
434 if (!VALID_HD_NAME_CHARS[*name]) {
435 return 0;
436 }
437 }
438 return 1;
439 }
440
441 /* Generated by genvchartbl.py */
442 static int VALID_HD_VALUE_CHARS[] = {
443 0 /* NUL */, 0 /* SOH */, 0 /* STX */, 0 /* ETX */,
444 0 /* EOT */, 0 /* ENQ */, 0 /* ACK */, 0 /* BEL */,
445 0 /* BS */, 1 /* HT */, 0 /* LF */, 0 /* VT */,
446 0 /* FF */, 0 /* CR */, 0 /* SO */, 0 /* SI */,
447 0 /* DLE */, 0 /* DC1 */, 0 /* DC2 */, 0 /* DC3 */,
448 0 /* DC4 */, 0 /* NAK */, 0 /* SYN */, 0 /* ETB */,
449 0 /* CAN */, 0 /* EM */, 0 /* SUB */, 0 /* ESC */,
450 0 /* FS */, 0 /* GS */, 0 /* RS */, 0 /* US */,
451 1 /* SPC */, 1 /* ! */, 1 /* " */, 1 /* # */,
452 1 /* $ */, 1 /* % */, 1 /* & */, 1 /* ' */,
453 1 /* ( */, 1 /* ) */, 1 /* * */, 1 /* + */,
454 1 /* , */, 1 /* - */, 1 /* . */, 1 /* / */,
455 1 /* 0 */, 1 /* 1 */, 1 /* 2 */, 1 /* 3 */,
456 1 /* 4 */, 1 /* 5 */, 1 /* 6 */, 1 /* 7 */,
457 1 /* 8 */, 1 /* 9 */, 1 /* : */, 1 /* ; */,
458 1 /* < */, 1 /* = */, 1 /* > */, 1 /* ? */,
459 1 /* @ */, 1 /* A */, 1 /* B */, 1 /* C */,
460 1 /* D */, 1 /* E */, 1 /* F */, 1 /* G */,
461 1 /* H */, 1 /* I */, 1 /* J */, 1 /* K */,
462 1 /* L */, 1 /* M */, 1 /* N */, 1 /* O */,
463 1 /* P */, 1 /* Q */, 1 /* R */, 1 /* S */,
464 1 /* T */, 1 /* U */, 1 /* V */, 1 /* W */,
465 1 /* X */, 1 /* Y */, 1 /* Z */, 1 /* [ */,
466 1 /* \ */, 1 /* ] */, 1 /* ^ */, 1 /* _ */,
467 1 /* ` */, 1 /* a */, 1 /* b */, 1 /* c */,
468 1 /* d */, 1 /* e */, 1 /* f */, 1 /* g */,
469 1 /* h */, 1 /* i */, 1 /* j */, 1 /* k */,
470 1 /* l */, 1 /* m */, 1 /* n */, 1 /* o */,
471 1 /* p */, 1 /* q */, 1 /* r */, 1 /* s */,
472 1 /* t */, 1 /* u */, 1 /* v */, 1 /* w */,
473 1 /* x */, 1 /* y */, 1 /* z */, 1 /* { */,
474 1 /* | */, 1 /* } */, 1 /* ~ */, 0 /* DEL */,
475 1 /* 0x80 */, 1 /* 0x81 */, 1 /* 0x82 */, 1 /* 0x83 */,
476 1 /* 0x84 */, 1 /* 0x85 */, 1 /* 0x86 */, 1 /* 0x87 */,
477 1 /* 0x88 */, 1 /* 0x89 */, 1 /* 0x8a */, 1 /* 0x8b */,
478 1 /* 0x8c */, 1 /* 0x8d */, 1 /* 0x8e */, 1 /* 0x8f */,
479 1 /* 0x90 */, 1 /* 0x91 */, 1 /* 0x92 */, 1 /* 0x93 */,
480 1 /* 0x94 */, 1 /* 0x95 */, 1 /* 0x96 */, 1 /* 0x97 */,
481 1 /* 0x98 */, 1 /* 0x99 */, 1 /* 0x9a */, 1 /* 0x9b */,
482 1 /* 0x9c */, 1 /* 0x9d */, 1 /* 0x9e */, 1 /* 0x9f */,
483 1 /* 0xa0 */, 1 /* 0xa1 */, 1 /* 0xa2 */, 1 /* 0xa3 */,
484 1 /* 0xa4 */, 1 /* 0xa5 */, 1 /* 0xa6 */, 1 /* 0xa7 */,
485 1 /* 0xa8 */, 1 /* 0xa9 */, 1 /* 0xaa */, 1 /* 0xab */,
486 1 /* 0xac */, 1 /* 0xad */, 1 /* 0xae */, 1 /* 0xaf */,
487 1 /* 0xb0 */, 1 /* 0xb1 */, 1 /* 0xb2 */, 1 /* 0xb3 */,
488 1 /* 0xb4 */, 1 /* 0xb5 */, 1 /* 0xb6 */, 1 /* 0xb7 */,
489 1 /* 0xb8 */, 1 /* 0xb9 */, 1 /* 0xba */, 1 /* 0xbb */,
490 1 /* 0xbc */, 1 /* 0xbd */, 1 /* 0xbe */, 1 /* 0xbf */,
491 1 /* 0xc0 */, 1 /* 0xc1 */, 1 /* 0xc2 */, 1 /* 0xc3 */,
492 1 /* 0xc4 */, 1 /* 0xc5 */, 1 /* 0xc6 */, 1 /* 0xc7 */,
493 1 /* 0xc8 */, 1 /* 0xc9 */, 1 /* 0xca */, 1 /* 0xcb */,
494 1 /* 0xcc */, 1 /* 0xcd */, 1 /* 0xce */, 1 /* 0xcf */,
495 1 /* 0xd0 */, 1 /* 0xd1 */, 1 /* 0xd2 */, 1 /* 0xd3 */,
496 1 /* 0xd4 */, 1 /* 0xd5 */, 1 /* 0xd6 */, 1 /* 0xd7 */,
497 1 /* 0xd8 */, 1 /* 0xd9 */, 1 /* 0xda */, 1 /* 0xdb */,
498 1 /* 0xdc */, 1 /* 0xdd */, 1 /* 0xde */, 1 /* 0xdf */,
499 1 /* 0xe0 */, 1 /* 0xe1 */, 1 /* 0xe2 */, 1 /* 0xe3 */,
500 1 /* 0xe4 */, 1 /* 0xe5 */, 1 /* 0xe6 */, 1 /* 0xe7 */,
501 1 /* 0xe8 */, 1 /* 0xe9 */, 1 /* 0xea */, 1 /* 0xeb */,
502 1 /* 0xec */, 1 /* 0xed */, 1 /* 0xee */, 1 /* 0xef */,
503 1 /* 0xf0 */, 1 /* 0xf1 */, 1 /* 0xf2 */, 1 /* 0xf3 */,
504 1 /* 0xf4 */, 1 /* 0xf5 */, 1 /* 0xf6 */, 1 /* 0xf7 */,
505 1 /* 0xf8 */, 1 /* 0xf9 */, 1 /* 0xfa */, 1 /* 0xfb */,
506 1 /* 0xfc */, 1 /* 0xfd */, 1 /* 0xfe */, 1 /* 0xff */
507 };
508
nghttp2_check_header_value(const uint8_t * value,size_t len)509 int nghttp2_check_header_value(const uint8_t *value, size_t len)
510 {
511 const uint8_t *last;
512 for (last = value + len; value != last; ++value) {
513 if (!VALID_HD_VALUE_CHARS[*value]) {
514 return 0;
515 }
516 }
517 return 1;
518 }
519
nghttp2_cpymem(uint8_t * dest,const void * src,size_t len)520 uint8_t *nghttp2_cpymem(uint8_t *dest, const void *src, size_t len)
521 {
522 if (len == 0) {
523 return dest;
524 }
525
526 memcpy(dest, src, len);
527
528 return dest + len;
529 }
530
nghttp2_http2_strerror(uint32_t error_code)531 const char *nghttp2_http2_strerror(uint32_t error_code)
532 {
533 switch (error_code) {
534 case NGHTTP2_NO_ERROR:
535 return "NO_ERROR";
536 case NGHTTP2_PROTOCOL_ERROR:
537 return "PROTOCOL_ERROR";
538 case NGHTTP2_INTERNAL_ERROR:
539 return "INTERNAL_ERROR";
540 case NGHTTP2_FLOW_CONTROL_ERROR:
541 return "FLOW_CONTROL_ERROR";
542 case NGHTTP2_SETTINGS_TIMEOUT:
543 return "SETTINGS_TIMEOUT";
544 case NGHTTP2_STREAM_CLOSED:
545 return "STREAM_CLOSED";
546 case NGHTTP2_FRAME_SIZE_ERROR:
547 return "FRAME_SIZE_ERROR";
548 case NGHTTP2_REFUSED_STREAM:
549 return "REFUSED_STREAM";
550 case NGHTTP2_CANCEL:
551 return "CANCEL";
552 case NGHTTP2_COMPRESSION_ERROR:
553 return "COMPRESSION_ERROR";
554 case NGHTTP2_CONNECT_ERROR:
555 return "CONNECT_ERROR";
556 case NGHTTP2_ENHANCE_YOUR_CALM:
557 return "ENHANCE_YOUR_CALM";
558 case NGHTTP2_INADEQUATE_SECURITY:
559 return "INADEQUATE_SECURITY";
560 case NGHTTP2_HTTP_1_1_REQUIRED:
561 return "HTTP_1_1_REQUIRED";
562 default:
563 return "unknown";
564 }
565 }
566