1 /*
2 * nghttp3
3 *
4 * Copyright (c) 2019 nghttp3 contributors
5 * Copyright (c) 2013 nghttp2 contributors
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining
8 * a copy of this software and associated documentation files (the
9 * "Software"), to deal in the Software without restriction, including
10 * without limitation the rights to use, copy, modify, merge, publish,
11 * distribute, sublicense, and/or sell copies of the Software, and to
12 * permit persons to whom the Software is furnished to do so, subject to
13 * the following conditions:
14 *
15 * The above copyright notice and this permission notice shall be
16 * included in all copies or substantial portions of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
19 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
21 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
22 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
23 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
24 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 */
26 #include "nghttp3_frame.h"
27
28 #include <string.h>
29 #include <assert.h>
30
31 #include "nghttp3_conv.h"
32 #include "nghttp3_str.h"
33
nghttp3_frame_write_hd(uint8_t * p,const nghttp3_frame_hd * hd)34 uint8_t *nghttp3_frame_write_hd(uint8_t *p, const nghttp3_frame_hd *hd) {
35 p = nghttp3_put_varint(p, hd->type);
36 p = nghttp3_put_varint(p, hd->length);
37 return p;
38 }
39
nghttp3_frame_write_hd_len(const nghttp3_frame_hd * hd)40 size_t nghttp3_frame_write_hd_len(const nghttp3_frame_hd *hd) {
41 return nghttp3_put_varint_len(hd->type) + nghttp3_put_varint_len(hd->length);
42 }
43
nghttp3_frame_write_settings(uint8_t * p,const nghttp3_frame_settings * fr)44 uint8_t *nghttp3_frame_write_settings(uint8_t *p,
45 const nghttp3_frame_settings *fr) {
46 size_t i;
47
48 p = nghttp3_frame_write_hd(p, &fr->hd);
49
50 for (i = 0; i < fr->niv; ++i) {
51 p = nghttp3_put_varint(p, (int64_t)fr->iv[i].id);
52 p = nghttp3_put_varint(p, (int64_t)fr->iv[i].value);
53 }
54
55 return p;
56 }
57
nghttp3_frame_write_settings_len(int64_t * ppayloadlen,const nghttp3_frame_settings * fr)58 size_t nghttp3_frame_write_settings_len(int64_t *ppayloadlen,
59 const nghttp3_frame_settings *fr) {
60 size_t payloadlen = 0;
61 size_t i;
62
63 for (i = 0; i < fr->niv; ++i) {
64 payloadlen += nghttp3_put_varint_len((int64_t)fr->iv[i].id) +
65 nghttp3_put_varint_len((int64_t)fr->iv[i].value);
66 }
67
68 *ppayloadlen = (int64_t)payloadlen;
69
70 return nghttp3_put_varint_len(NGHTTP3_FRAME_SETTINGS) +
71 nghttp3_put_varint_len((int64_t)payloadlen) + payloadlen;
72 }
73
nghttp3_frame_write_goaway(uint8_t * p,const nghttp3_frame_goaway * fr)74 uint8_t *nghttp3_frame_write_goaway(uint8_t *p,
75 const nghttp3_frame_goaway *fr) {
76 p = nghttp3_frame_write_hd(p, &fr->hd);
77 p = nghttp3_put_varint(p, fr->id);
78
79 return p;
80 }
81
nghttp3_frame_write_goaway_len(int64_t * ppayloadlen,const nghttp3_frame_goaway * fr)82 size_t nghttp3_frame_write_goaway_len(int64_t *ppayloadlen,
83 const nghttp3_frame_goaway *fr) {
84 size_t payloadlen = nghttp3_put_varint_len(fr->id);
85
86 *ppayloadlen = (int64_t)payloadlen;
87
88 return nghttp3_put_varint_len(NGHTTP3_FRAME_GOAWAY) +
89 nghttp3_put_varint_len((int64_t)payloadlen) + payloadlen;
90 }
91
92 uint8_t *
nghttp3_frame_write_priority_update(uint8_t * p,const nghttp3_frame_priority_update * fr)93 nghttp3_frame_write_priority_update(uint8_t *p,
94 const nghttp3_frame_priority_update *fr) {
95 p = nghttp3_frame_write_hd(p, &fr->hd);
96 p = nghttp3_put_varint(p, fr->pri_elem_id);
97
98 assert(fr->pri.urgency <= NGHTTP3_URGENCY_LOW);
99
100 *p++ = 'u';
101 *p++ = '=';
102 *p++ = (uint8_t)('0' + fr->pri.urgency);
103
104 if (fr->pri.inc) {
105 #define NGHTTP3_PRIORITY_INCREMENTAL ", i"
106 p = nghttp3_cpymem(p, (const uint8_t *)NGHTTP3_PRIORITY_INCREMENTAL,
107 sizeof(NGHTTP3_PRIORITY_INCREMENTAL) - 1);
108 }
109
110 return p;
111 }
112
nghttp3_frame_write_priority_update_len(int64_t * ppayloadlen,const nghttp3_frame_priority_update * fr)113 size_t nghttp3_frame_write_priority_update_len(
114 int64_t *ppayloadlen, const nghttp3_frame_priority_update *fr) {
115 size_t payloadlen = nghttp3_put_varint_len(fr->pri_elem_id) + sizeof("u=U") -
116 1 + (fr->pri.inc ? sizeof(", i") - 1 : 0);
117
118 *ppayloadlen = (int64_t)payloadlen;
119
120 return nghttp3_put_varint_len(fr->hd.type) +
121 nghttp3_put_varint_len((int64_t)payloadlen) + payloadlen;
122 }
123
nghttp3_nva_copy(nghttp3_nv ** pnva,const nghttp3_nv * nva,size_t nvlen,const nghttp3_mem * mem)124 int nghttp3_nva_copy(nghttp3_nv **pnva, const nghttp3_nv *nva, size_t nvlen,
125 const nghttp3_mem *mem) {
126 size_t i;
127 uint8_t *data = NULL;
128 size_t buflen = 0;
129 nghttp3_nv *p;
130
131 if (nvlen == 0) {
132 *pnva = NULL;
133
134 return 0;
135 }
136
137 for (i = 0; i < nvlen; ++i) {
138 /* + 1 for null-termination */
139 if ((nva[i].flags & NGHTTP3_NV_FLAG_NO_COPY_NAME) == 0) {
140 buflen += nva[i].namelen + 1;
141 }
142 if ((nva[i].flags & NGHTTP3_NV_FLAG_NO_COPY_VALUE) == 0) {
143 buflen += nva[i].valuelen + 1;
144 }
145 }
146
147 buflen += sizeof(nghttp3_nv) * nvlen;
148
149 *pnva = nghttp3_mem_malloc(mem, buflen);
150
151 if (*pnva == NULL) {
152 return NGHTTP3_ERR_NOMEM;
153 }
154
155 p = *pnva;
156 data = (uint8_t *)(*pnva) + sizeof(nghttp3_nv) * nvlen;
157
158 for (i = 0; i < nvlen; ++i) {
159 p->flags = nva[i].flags;
160
161 if (nva[i].flags & NGHTTP3_NV_FLAG_NO_COPY_NAME) {
162 p->name = nva[i].name;
163 p->namelen = nva[i].namelen;
164 } else {
165 if (nva[i].namelen) {
166 memcpy(data, nva[i].name, nva[i].namelen);
167 }
168 p->name = data;
169 p->namelen = nva[i].namelen;
170 data[p->namelen] = '\0';
171 nghttp3_downcase(p->name, p->namelen);
172 data += nva[i].namelen + 1;
173 }
174
175 if (nva[i].flags & NGHTTP3_NV_FLAG_NO_COPY_VALUE) {
176 p->value = nva[i].value;
177 p->valuelen = nva[i].valuelen;
178 } else {
179 if (nva[i].valuelen) {
180 memcpy(data, nva[i].value, nva[i].valuelen);
181 }
182 p->value = data;
183 p->valuelen = nva[i].valuelen;
184 data[p->valuelen] = '\0';
185 data += nva[i].valuelen + 1;
186 }
187
188 ++p;
189 }
190 return 0;
191 }
192
nghttp3_nva_del(nghttp3_nv * nva,const nghttp3_mem * mem)193 void nghttp3_nva_del(nghttp3_nv *nva, const nghttp3_mem *mem) {
194 nghttp3_mem_free(mem, nva);
195 }
196
nghttp3_frame_headers_free(nghttp3_frame_headers * fr,const nghttp3_mem * mem)197 void nghttp3_frame_headers_free(nghttp3_frame_headers *fr,
198 const nghttp3_mem *mem) {
199 if (fr == NULL) {
200 return;
201 }
202
203 nghttp3_nva_del(fr->nva, mem);
204 }
205