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comparison src/http/v3/ngx_http_v3.c @ 8226:268f4389130d quic

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Refactored HTTP/3 parser.
author Roman Arutyunyan <arut@nginx.com>
date Wed, 18 Mar 2020 13:46:35 +0300
parents 38c0898b6df7
children b13176e717ba
comparison
equal deleted inserted replaced
8225:714a19dba6af 8226:268f4389130d
92 92
93 *p++ = value & 0x7f; 93 *p++ = value & 0x7f;
94 94
95 return (uintptr_t) p; 95 return (uintptr_t) p;
96 } 96 }
97
98
99 uint64_t
100 ngx_http_v3_decode_varlen_int(u_char *p)
101 {
102 uint64_t value;
103 ngx_uint_t len;
104
105 len = *p >> 6;
106 value = *p & 0x3f;
107
108 while (len--) {
109 value = (value << 8) + *p++;
110 }
111
112 return value;
113 }
114
115
116 int64_t
117 ngx_http_v3_decode_prefix_int(u_char **src, size_t len, ngx_uint_t prefix)
118 {
119 u_char *p;
120 int64_t value, thresh;
121
122 if (len == 0) {
123 return NGX_ERROR;
124 }
125
126 p = *src;
127
128 thresh = (1 << prefix) - 1;
129 value = *p++ & thresh;
130
131 if (value != thresh) {
132 *src = p;
133 return value;
134 }
135
136 value = 0;
137
138 /* XXX handle overflows */
139
140 while (--len) {
141 value = (value << 7) + (*p & 0x7f);
142 if ((*p++ & 0x80) == 0) {
143 *src = p;
144 return value + thresh;
145 }
146 }
147
148 return NGX_ERROR;
149 }
150
151
152 ngx_int_t
153 ngx_http_v3_decode_huffman(ngx_connection_t *c, ngx_str_t *s)
154 {
155 u_char state, *p, *data;
156
157 state = 0;
158
159 p = ngx_pnalloc(c->pool, s->len * 8 / 5);
160 if (p == NULL) {
161 return NGX_ERROR;
162 }
163
164 data = p;
165
166 if (ngx_http_v2_huff_decode(&state, s->data, s->len, &p, 1, c->log)
167 != NGX_OK)
168 {
169 return NGX_ERROR;
170 }
171
172 s->len = p - data;
173 s->data = data;
174
175 return NGX_OK;
176 }