1 | /* Based on src/http/ngx_http_parse.c from NGINX copyright Igor Sysoev
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2 | *
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3 | * Additional changes are licensed under the same terms as NGINX and
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4 | * copyright Joyent, Inc. and other Node contributors. All rights reserved.
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5 | *
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6 | * Permission is hereby granted, free of charge, to any person obtaining a copy
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7 | * of this software and associated documentation files (the "Software"), to
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8 | * deal in the Software without restriction, including without limitation the
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9 | * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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10 | * sell copies of the Software, and to permit persons to whom the Software is
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11 | * furnished to do so, subject to the following conditions:
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12 | *
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13 | * The above copyright notice and this permission notice shall be included in
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14 | * all copies or substantial portions of the Software.
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15 | *
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16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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19 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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21 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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22 | * IN THE SOFTWARE.
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23 | */
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24 | #include "http_parser.h"
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25 | //#include <assert.h>
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26 | #include <stddef.h>
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27 | #include <ctype.h>
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28 | #include <stdlib.h>
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29 | #include <string.h>
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30 | #include <limits.h>
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31 | #include "core/ntlibc.h"
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32 |
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33 | #ifndef ULLONG_MAX
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34 | # define ULLONG_MAX ((uint64_t) -1) /* 2^64-1 */
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35 | #endif
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36 |
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37 | #ifndef MIN
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38 | # define MIN(a,b) ((a) < (b) ? (a) : (b))
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39 | #endif
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40 |
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41 | #ifndef ARRAY_SIZE
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42 | # define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
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43 | #endif
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44 |
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45 | #ifndef BIT_AT
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46 | # define BIT_AT(a, i) \
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47 | (!!((unsigned int) (a)[(unsigned int) (i) >> 3] & \
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48 | (1 << ((unsigned int) (i) & 7))))
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49 | #endif
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50 |
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51 | #ifndef ELEM_AT
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52 | # define ELEM_AT(a, i, v) ((unsigned int) (i) < ARRAY_SIZE(a) ? (a)[(i)] : (v))
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53 | #endif
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54 |
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55 | #define SET_ERRNO(e) \
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56 | do { \
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57 | parser->http_errno = (e); \
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58 | } while(0)
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59 |
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60 | #define CURRENT_STATE() p_state
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61 | #define UPDATE_STATE(V) p_state = (enum state) (V);
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62 | #define RETURN(V) \
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63 | do { \
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64 | parser->state = CURRENT_STATE(); \
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65 | return (V); \
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66 | } while (0);
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67 | #define REEXECUTE() \
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68 | --p; \
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69 | break;
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70 |
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71 |
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72 | #ifdef __GNUC__
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73 | # define LIKELY(X) __builtin_expect(!!(X), 1)
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74 | # define UNLIKELY(X) __builtin_expect(!!(X), 0)
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75 | #else
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76 | # define LIKELY(X) (X)
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77 | # define UNLIKELY(X) (X)
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78 | #endif
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79 |
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80 |
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81 | /* Run the notify callback FOR, returning ER if it fails */
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82 | #define CALLBACK_NOTIFY_(FOR, ER) \
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83 | do { \
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84 | assert(HTTP_PARSER_ERRNO(parser) == HPE_OK); \
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85 | \
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86 | if (LIKELY(settings->on_##FOR)) { \
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87 | parser->state = CURRENT_STATE(); \
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88 | if (UNLIKELY(0 != settings->on_##FOR(parser))) { \
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89 | SET_ERRNO(HPE_CB_##FOR); \
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90 | } \
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91 | UPDATE_STATE(parser->state); \
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92 | \
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93 | /* We either errored above or got paused; get out */ \
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94 | if (UNLIKELY(HTTP_PARSER_ERRNO(parser) != HPE_OK)) { \
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95 | return (ER); \
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96 | } \
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97 | } \
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98 | } while (0)
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99 |
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100 | /* Run the notify callback FOR and consume the current byte */
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101 | #define CALLBACK_NOTIFY(FOR) CALLBACK_NOTIFY_(FOR, p - data + 1)
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102 |
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103 | /* Run the notify callback FOR and don't consume the current byte */
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104 | #define CALLBACK_NOTIFY_NOADVANCE(FOR) CALLBACK_NOTIFY_(FOR, p - data)
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105 |
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106 | /* Run data callback FOR with LEN bytes, returning ER if it fails */
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107 | #define CALLBACK_DATA_(FOR, LEN, ER) \
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108 | do { \
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109 | assert(HTTP_PARSER_ERRNO(parser) == HPE_OK); \
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110 | \
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111 | if (FOR##_mark) { \
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112 | if (LIKELY(settings->on_##FOR)) { \
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113 | parser->state = CURRENT_STATE(); \
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114 | if (UNLIKELY(0 != \
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115 | settings->on_##FOR(parser, FOR##_mark, (LEN)))) { \
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116 | SET_ERRNO(HPE_CB_##FOR); \
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117 | } \
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118 | UPDATE_STATE(parser->state); \
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119 | \
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120 | /* We either errored above or got paused; get out */ \
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121 | if (UNLIKELY(HTTP_PARSER_ERRNO(parser) != HPE_OK)) { \
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122 | return (ER); \
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123 | } \
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124 | } \
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125 | FOR##_mark = NULL; \
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126 | } \
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127 | } while (0)
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128 |
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129 | /* Run the data callback FOR and consume the current byte */
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130 | #define CALLBACK_DATA(FOR) \
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131 | CALLBACK_DATA_(FOR, p - FOR##_mark, p - data + 1)
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132 |
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133 | /* Run the data callback FOR and don't consume the current byte */
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134 | #define CALLBACK_DATA_NOADVANCE(FOR) \
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135 | CALLBACK_DATA_(FOR, p - FOR##_mark, p - data)
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136 |
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137 | /* Set the mark FOR; non-destructive if mark is already set */
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138 | #define MARK(FOR) \
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139 | do { \
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140 | if (!FOR##_mark) { \
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141 | FOR##_mark = p; \
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142 | } \
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143 | } while (0)
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144 |
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145 | /* Don't allow the total size of the HTTP headers (including the status
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146 | * line) to exceed HTTP_MAX_HEADER_SIZE. This check is here to protect
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147 | * embedders against denial-of-service attacks where the attacker feeds
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148 | * us a never-ending header that the embedder keeps buffering.
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149 | *
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150 | * This check is arguably the responsibility of embedders but we're doing
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151 | * it on the embedder's behalf because most won't bother and this way we
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152 | * make the web a little safer. HTTP_MAX_HEADER_SIZE is still far bigger
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153 | * than any reasonable request or response so this should never affect
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154 | * day-to-day operation.
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155 | */
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156 | #define COUNT_HEADER_SIZE(V) \
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157 | do { \
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158 | parser->nread += (V); \
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159 | if (UNLIKELY(parser->nread > (HTTP_MAX_HEADER_SIZE))) { \
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160 | SET_ERRNO(HPE_HEADER_OVERFLOW); \
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161 | goto error; \
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162 | } \
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163 | } while (0)
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164 |
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165 |
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166 | #define PROXY_CONNECTION "proxy-connection"
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167 | #define CONNECTION "connection"
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168 | #define CONTENT_LENGTH "content-length"
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169 | #define TRANSFER_ENCODING "transfer-encoding"
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170 | #define UPGRADE "upgrade"
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171 | #define CHUNKED "chunked"
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172 | #define KEEP_ALIVE "keep-alive"
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173 | #define CLOSE "close"
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174 |
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175 |
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176 | static const char *method_strings[] =
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177 | {
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178 | #define XX(num, name, string) #string,
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179 | HTTP_METHOD_MAP(XX)
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180 | #undef XX
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181 | };
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182 |
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183 |
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184 | /* Tokens as defined by rfc 2616. Also lowercases them.
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185 | * token = 1*<any CHAR except CTLs or separators>
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186 | * separators = "(" | ")" | "<" | ">" | "@"
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187 | * | "," | ";" | ":" | "\" | <">
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188 | * | "/" | "[" | "]" | "?" | "="
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189 | * | "{" | "}" | SP | HT
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190 | */
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191 | static const char tokens[256] = {
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192 | /* 0 nul 1 soh 2 stx 3 etx 4 eot 5 enq 6 ack 7 bel */
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193 | 0, 0, 0, 0, 0, 0, 0, 0,
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194 | /* 8 bs 9 ht 10 nl 11 vt 12 np 13 cr 14 so 15 si */
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195 | 0, 0, 0, 0, 0, 0, 0, 0,
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196 | /* 16 dle 17 dc1 18 dc2 19 dc3 20 dc4 21 nak 22 syn 23 etb */
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197 | 0, 0, 0, 0, 0, 0, 0, 0,
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198 | /* 24 can 25 em 26 sub 27 esc 28 fs 29 gs 30 rs 31 us */
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199 | 0, 0, 0, 0, 0, 0, 0, 0,
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200 | /* 32 sp 33 ! 34 " 35 # 36 $ 37 % 38 & 39 ' */
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201 | 0, '!', 0, '#', '$', '%', '&', '\'',
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202 | /* 40 ( 41 ) 42 * 43 + 44 , 45 - 46 . 47 / */
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203 | 0, 0, '*', '+', 0, '-', '.', 0,
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204 | /* 48 0 49 1 50 2 51 3 52 4 53 5 54 6 55 7 */
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205 | '0', '1', '2', '3', '4', '5', '6', '7',
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206 | /* 56 8 57 9 58 : 59 ; 60 < 61 = 62 > 63 ? */
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207 | '8', '9', 0, 0, 0, 0, 0, 0,
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208 | /* 64 @ 65 A 66 B 67 C 68 D 69 E 70 F 71 G */
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209 | 0, 'a', 'b', 'c', 'd', 'e', 'f', 'g',
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210 | /* 72 H 73 I 74 J 75 K 76 L 77 M 78 N 79 O */
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211 | 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
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212 | /* 80 P 81 Q 82 R 83 S 84 T 85 U 86 V 87 W */
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213 | 'p', 'q', 'r', 's', 't', 'u', 'v', 'w',
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214 | /* 88 X 89 Y 90 Z 91 [ 92 \ 93 ] 94 ^ 95 _ */
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215 | 'x', 'y', 'z', 0, 0, 0, '^', '_',
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216 | /* 96 ` 97 a 98 b 99 c 100 d 101 e 102 f 103 g */
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217 | '`', 'a', 'b', 'c', 'd', 'e', 'f', 'g',
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218 | /* 104 h 105 i 106 j 107 k 108 l 109 m 110 n 111 o */
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219 | 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
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220 | /* 112 p 113 q 114 r 115 s 116 t 117 u 118 v 119 w */
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221 | 'p', 'q', 'r', 's', 't', 'u', 'v', 'w',
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222 | /* 120 x 121 y 122 z 123 { 124 | 125 } 126 ~ 127 del */
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223 | 'x', 'y', 'z', 0, '|', 0, '~', 0 };
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224 |
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225 |
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226 | static const int8_t unhex[256] =
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227 | {-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1
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228 | ,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1
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229 | ,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1
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230 | , 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,-1,-1,-1,-1,-1,-1
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231 | ,-1,10,11,12,13,14,15,-1,-1,-1,-1,-1,-1,-1,-1,-1
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232 | ,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1
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233 | ,-1,10,11,12,13,14,15,-1,-1,-1,-1,-1,-1,-1,-1,-1
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234 | ,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1
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235 | };
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236 |
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237 |
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238 | #if HTTP_PARSER_STRICT
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239 | # define T(v) 0
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240 | #else
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241 | # define T(v) v
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242 | #endif
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243 |
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244 |
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245 | static const uint8_t normal_url_char[32] = {
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246 | /* 0 nul 1 soh 2 stx 3 etx 4 eot 5 enq 6 ack 7 bel */
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247 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0,
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248 | /* 8 bs 9 ht 10 nl 11 vt 12 np 13 cr 14 so 15 si */
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249 | 0 | T(2) | 0 | 0 | T(16) | 0 | 0 | 0,
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250 | /* 16 dle 17 dc1 18 dc2 19 dc3 20 dc4 21 nak 22 syn 23 etb */
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251 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0,
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252 | /* 24 can 25 em 26 sub 27 esc 28 fs 29 gs 30 rs 31 us */
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253 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0,
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254 | /* 32 sp 33 ! 34 " 35 # 36 $ 37 % 38 & 39 ' */
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255 | 0 | 2 | 4 | 0 | 16 | 32 | 64 | 128,
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256 | /* 40 ( 41 ) 42 * 43 + 44 , 45 - 46 . 47 / */
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257 | 1 | 2 | 4 | 8 | 16 | 32 | 64 | 128,
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258 | /* 48 0 49 1 50 2 51 3 52 4 53 5 54 6 55 7 */
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259 | 1 | 2 | 4 | 8 | 16 | 32 | 64 | 128,
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260 | /* 56 8 57 9 58 : 59 ; 60 < 61 = 62 > 63 ? */
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261 | 1 | 2 | 4 | 8 | 16 | 32 | 64 | 0,
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262 | /* 64 @ 65 A 66 B 67 C 68 D 69 E 70 F 71 G */
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263 | 1 | 2 | 4 | 8 | 16 | 32 | 64 | 128,
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264 | /* 72 H 73 I 74 J 75 K 76 L 77 M 78 N 79 O */
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265 | 1 | 2 | 4 | 8 | 16 | 32 | 64 | 128,
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266 | /* 80 P 81 Q 82 R 83 S 84 T 85 U 86 V 87 W */
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267 | 1 | 2 | 4 | 8 | 16 | 32 | 64 | 128,
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268 | /* 88 X 89 Y 90 Z 91 [ 92 \ 93 ] 94 ^ 95 _ */
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269 | 1 | 2 | 4 | 8 | 16 | 32 | 64 | 128,
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270 | /* 96 ` 97 a 98 b 99 c 100 d 101 e 102 f 103 g */
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271 | 1 | 2 | 4 | 8 | 16 | 32 | 64 | 128,
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272 | /* 104 h 105 i 106 j 107 k 108 l 109 m 110 n 111 o */
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273 | 1 | 2 | 4 | 8 | 16 | 32 | 64 | 128,
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274 | /* 112 p 113 q 114 r 115 s 116 t 117 u 118 v 119 w */
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275 | 1 | 2 | 4 | 8 | 16 | 32 | 64 | 128,
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276 | /* 120 x 121 y 122 z 123 { 124 | 125 } 126 ~ 127 del */
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277 | 1 | 2 | 4 | 8 | 16 | 32 | 64 | 0, };
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278 |
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279 | #undef T
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280 |
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281 | enum state
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282 | { s_dead = 1 /* important that this is > 0 */
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283 |
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284 | , s_start_req_or_res
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285 | , s_res_or_resp_H
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286 | , s_start_res
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287 | , s_res_H
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288 | , s_res_HT
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289 | , s_res_HTT
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290 | , s_res_HTTP
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291 | , s_res_first_http_major
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292 | , s_res_http_major
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293 | , s_res_first_http_minor
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294 | , s_res_http_minor
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295 | , s_res_first_status_code
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296 | , s_res_status_code
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297 | , s_res_status_start
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298 | , s_res_status
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299 | , s_res_line_almost_done
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300 |
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301 | , s_start_req
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302 |
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303 | , s_req_method
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304 | , s_req_spaces_before_url
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305 | , s_req_schema
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306 | , s_req_schema_slash
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307 | , s_req_schema_slash_slash
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308 | , s_req_server_start
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309 | , s_req_server
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310 | , s_req_server_with_at
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311 | , s_req_path
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312 | , s_req_query_string_start
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313 | , s_req_query_string
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314 | , s_req_fragment_start
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315 | , s_req_fragment
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316 | , s_req_http_start
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317 | , s_req_http_H
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318 | , s_req_http_HT
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319 | , s_req_http_HTT
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320 | , s_req_http_HTTP
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321 | , s_req_first_http_major
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322 | , s_req_http_major
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323 | , s_req_first_http_minor
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324 | , s_req_http_minor
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325 | , s_req_line_almost_done
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326 |
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327 | , s_header_field_start
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328 | , s_header_field
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329 | , s_header_value_discard_ws
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330 | , s_header_value_discard_ws_almost_done
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331 | , s_header_value_discard_lws
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332 | , s_header_value_start
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333 | , s_header_value
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334 | , s_header_value_lws
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335 |
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336 | , s_header_almost_done
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337 |
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338 | , s_chunk_size_start
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339 | , s_chunk_size
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340 | , s_chunk_parameters
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341 | , s_chunk_size_almost_done
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342 |
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343 | , s_headers_almost_done
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344 | , s_headers_done
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345 |
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346 | /* Important: 's_headers_done' must be the last 'header' state. All
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347 | * states beyond this must be 'body' states. It is used for overflow
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348 | * checking. See the PARSING_HEADER() macro.
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349 | */
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350 |
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351 | , s_chunk_data
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352 | , s_chunk_data_almost_done
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353 | , s_chunk_data_done
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354 |
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355 | , s_body_identity
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356 | , s_body_identity_eof
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357 |
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358 | , s_message_done
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359 | };
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360 |
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361 |
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362 | #define PARSING_HEADER(state) (state <= s_headers_done)
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363 |
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364 |
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365 | enum header_states
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366 | { h_general = 0
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367 | , h_C
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368 | , h_CO
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369 | , h_CON
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370 |
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371 | , h_matching_connection
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372 | , h_matching_proxy_connection
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373 | , h_matching_content_length
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374 | , h_matching_transfer_encoding
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375 | , h_matching_upgrade
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376 |
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377 | , h_connection
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378 | , h_content_length
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379 | , h_transfer_encoding
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380 | , h_upgrade
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381 |
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382 | , h_matching_transfer_encoding_chunked
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383 | , h_matching_connection_token_start
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384 | , h_matching_connection_keep_alive
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385 | , h_matching_connection_close
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386 | , h_matching_connection_upgrade
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387 | , h_matching_connection_token
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388 |
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389 | , h_transfer_encoding_chunked
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390 | , h_connection_keep_alive
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391 | , h_connection_close
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392 | , h_connection_upgrade
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393 | };
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394 |
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395 | enum http_host_state
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396 | {
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397 | s_http_host_dead = 1
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398 | , s_http_userinfo_start
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399 | , s_http_userinfo
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400 | , s_http_host_start
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401 | , s_http_host_v6_start
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402 | , s_http_host
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403 | , s_http_host_v6
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404 | , s_http_host_v6_end
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405 | , s_http_host_port_start
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406 | , s_http_host_port
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407 | };
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408 |
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---|
409 | /* Macros for character classes; depends on strict-mode */
|
---|
410 | #define CR '\r'
|
---|
411 | #define LF '\n'
|
---|
412 | #define LOWER(c) (unsigned char)(c | 0x20)
|
---|
413 | #define IS_ALPHA(c) (LOWER(c) >= 'a' && LOWER(c) <= 'z')
|
---|
414 | #define IS_NUM(c) ((c) >= '0' && (c) <= '9')
|
---|
415 | #define IS_ALPHANUM(c) (IS_ALPHA(c) || IS_NUM(c))
|
---|
416 | #define IS_HEX(c) (IS_NUM(c) || (LOWER(c) >= 'a' && LOWER(c) <= 'f'))
|
---|
417 | #define IS_MARK(c) ((c) == '-' || (c) == '_' || (c) == '.' || \
|
---|
418 | (c) == '!' || (c) == '~' || (c) == '*' || (c) == '\'' || (c) == '(' || \
|
---|
419 | (c) == ')')
|
---|
420 | #define IS_USERINFO_CHAR(c) (IS_ALPHANUM(c) || IS_MARK(c) || (c) == '%' || \
|
---|
421 | (c) == ';' || (c) == ':' || (c) == '&' || (c) == '=' || (c) == '+' || \
|
---|
422 | (c) == '$' || (c) == ',')
|
---|
423 |
|
---|
424 | #define STRICT_TOKEN(c) (tokens[(unsigned char)c])
|
---|
425 |
|
---|
426 | #if HTTP_PARSER_STRICT
|
---|
427 | #define TOKEN(c) (tokens[(unsigned char)c])
|
---|
428 | #define IS_URL_CHAR(c) (BIT_AT(normal_url_char, (unsigned char)c))
|
---|
429 | #define IS_HOST_CHAR(c) (IS_ALPHANUM(c) || (c) == '.' || (c) == '-')
|
---|
430 | #else
|
---|
431 | #define TOKEN(c) ((c == ' ') ? ' ' : tokens[(unsigned char)c])
|
---|
432 | #define IS_URL_CHAR(c) \
|
---|
433 | (BIT_AT(normal_url_char, (unsigned char)c) || ((c) & 0x80))
|
---|
434 | #define IS_HOST_CHAR(c) \
|
---|
435 | (IS_ALPHANUM(c) || (c) == '.' || (c) == '-' || (c) == '_')
|
---|
436 | #endif
|
---|
437 |
|
---|
438 |
|
---|
439 | #define start_state (parser->type == HTTP_REQUEST ? s_start_req : s_start_res)
|
---|
440 |
|
---|
441 |
|
---|
442 | #if HTTP_PARSER_STRICT
|
---|
443 | # define STRICT_CHECK(cond) \
|
---|
444 | do { \
|
---|
445 | if (cond) { \
|
---|
446 | SET_ERRNO(HPE_STRICT); \
|
---|
447 | goto error; \
|
---|
448 | } \
|
---|
449 | } while (0)
|
---|
450 | # define NEW_MESSAGE() (http_should_keep_alive(parser) ? start_state : s_dead)
|
---|
451 | #else
|
---|
452 | # define STRICT_CHECK(cond)
|
---|
453 | # define NEW_MESSAGE() start_state
|
---|
454 | #endif
|
---|
455 |
|
---|
456 |
|
---|
457 | /* Map errno values to strings for human-readable output */
|
---|
458 | #define HTTP_STRERROR_GEN(n, s) { "HPE_" #n, s },
|
---|
459 | static struct {
|
---|
460 | const char *name;
|
---|
461 | const char *description;
|
---|
462 | } http_strerror_tab[] = {
|
---|
463 | HTTP_ERRNO_MAP(HTTP_STRERROR_GEN)
|
---|
464 | };
|
---|
465 | #undef HTTP_STRERROR_GEN
|
---|
466 |
|
---|
467 | int http_message_needs_eof(const http_parser *parser);
|
---|
468 |
|
---|
469 | /* Our URL parser.
|
---|
470 | *
|
---|
471 | * This is designed to be shared by http_parser_execute() for URL validation,
|
---|
472 | * hence it has a state transition + byte-for-byte interface. In addition, it
|
---|
473 | * is meant to be embedded in http_parser_parse_url(), which does the dirty
|
---|
474 | * work of turning state transitions URL components for its API.
|
---|
475 | *
|
---|
476 | * This function should only be invoked with non-space characters. It is
|
---|
477 | * assumed that the caller cares about (and can detect) the transition between
|
---|
478 | * URL and non-URL states by looking for these.
|
---|
479 | */
|
---|
480 | static enum state
|
---|
481 | parse_url_char(enum state s, const char ch)
|
---|
482 | {
|
---|
483 | if (ch == ' ' || ch == '\r' || ch == '\n') {
|
---|
484 | return s_dead;
|
---|
485 | }
|
---|
486 |
|
---|
487 | #if HTTP_PARSER_STRICT
|
---|
488 | if (ch == '\t' || ch == '\f') {
|
---|
489 | return s_dead;
|
---|
490 | }
|
---|
491 | #endif
|
---|
492 |
|
---|
493 | switch (s) {
|
---|
494 | case s_req_spaces_before_url:
|
---|
495 | /* Proxied requests are followed by scheme of an absolute URI (alpha).
|
---|
496 | * All methods except CONNECT are followed by '/' or '*'.
|
---|
497 | */
|
---|
498 |
|
---|
499 | if (ch == '/' || ch == '*') {
|
---|
500 | return s_req_path;
|
---|
501 | }
|
---|
502 |
|
---|
503 | if (IS_ALPHA(ch)) {
|
---|
504 | return s_req_schema;
|
---|
505 | }
|
---|
506 |
|
---|
507 | break;
|
---|
508 |
|
---|
509 | case s_req_schema:
|
---|
510 | if (IS_ALPHA(ch)) {
|
---|
511 | return s;
|
---|
512 | }
|
---|
513 |
|
---|
514 | if (ch == ':') {
|
---|
515 | return s_req_schema_slash;
|
---|
516 | }
|
---|
517 |
|
---|
518 | break;
|
---|
519 |
|
---|
520 | case s_req_schema_slash:
|
---|
521 | if (ch == '/') {
|
---|
522 | return s_req_schema_slash_slash;
|
---|
523 | }
|
---|
524 |
|
---|
525 | break;
|
---|
526 |
|
---|
527 | case s_req_schema_slash_slash:
|
---|
528 | if (ch == '/') {
|
---|
529 | return s_req_server_start;
|
---|
530 | }
|
---|
531 |
|
---|
532 | break;
|
---|
533 |
|
---|
534 | case s_req_server_with_at:
|
---|
535 | if (ch == '@') {
|
---|
536 | return s_dead;
|
---|
537 | }
|
---|
538 |
|
---|
539 | /* FALLTHROUGH */
|
---|
540 | case s_req_server_start:
|
---|
541 | case s_req_server:
|
---|
542 | if (ch == '/') {
|
---|
543 | return s_req_path;
|
---|
544 | }
|
---|
545 |
|
---|
546 | if (ch == '?') {
|
---|
547 | return s_req_query_string_start;
|
---|
548 | }
|
---|
549 |
|
---|
550 | if (ch == '@') {
|
---|
551 | return s_req_server_with_at;
|
---|
552 | }
|
---|
553 |
|
---|
554 | if (IS_USERINFO_CHAR(ch) || ch == '[' || ch == ']') {
|
---|
555 | return s_req_server;
|
---|
556 | }
|
---|
557 |
|
---|
558 | break;
|
---|
559 |
|
---|
560 | case s_req_path:
|
---|
561 | if (IS_URL_CHAR(ch)) {
|
---|
562 | return s;
|
---|
563 | }
|
---|
564 |
|
---|
565 | switch (ch) {
|
---|
566 | case '?':
|
---|
567 | return s_req_query_string_start;
|
---|
568 |
|
---|
569 | case '#':
|
---|
570 | return s_req_fragment_start;
|
---|
571 | }
|
---|
572 |
|
---|
573 | break;
|
---|
574 |
|
---|
575 | case s_req_query_string_start:
|
---|
576 | case s_req_query_string:
|
---|
577 | if (IS_URL_CHAR(ch)) {
|
---|
578 | return s_req_query_string;
|
---|
579 | }
|
---|
580 |
|
---|
581 | switch (ch) {
|
---|
582 | case '?':
|
---|
583 | /* allow extra '?' in query string */
|
---|
584 | return s_req_query_string;
|
---|
585 |
|
---|
586 | case '#':
|
---|
587 | return s_req_fragment_start;
|
---|
588 | }
|
---|
589 |
|
---|
590 | break;
|
---|
591 |
|
---|
592 | case s_req_fragment_start:
|
---|
593 | if (IS_URL_CHAR(ch)) {
|
---|
594 | return s_req_fragment;
|
---|
595 | }
|
---|
596 |
|
---|
597 | switch (ch) {
|
---|
598 | case '?':
|
---|
599 | return s_req_fragment;
|
---|
600 |
|
---|
601 | case '#':
|
---|
602 | return s;
|
---|
603 | }
|
---|
604 |
|
---|
605 | break;
|
---|
606 |
|
---|
607 | case s_req_fragment:
|
---|
608 | if (IS_URL_CHAR(ch)) {
|
---|
609 | return s;
|
---|
610 | }
|
---|
611 |
|
---|
612 | switch (ch) {
|
---|
613 | case '?':
|
---|
614 | case '#':
|
---|
615 | return s;
|
---|
616 | }
|
---|
617 |
|
---|
618 | break;
|
---|
619 |
|
---|
620 | default:
|
---|
621 | break;
|
---|
622 | }
|
---|
623 |
|
---|
624 | /* We should never fall out of the switch above unless there's an error */
|
---|
625 | return s_dead;
|
---|
626 | }
|
---|
627 |
|
---|
628 | size_t http_parser_execute (http_parser *parser,
|
---|
629 | const http_parser_settings *settings,
|
---|
630 | const char *data,
|
---|
631 | size_t len)
|
---|
632 | {
|
---|
633 | char c, ch;
|
---|
634 | int8_t unhex_val;
|
---|
635 | const char *p = data;
|
---|
636 | const char *header_field_mark = 0;
|
---|
637 | const char *header_value_mark = 0;
|
---|
638 | const char *url_mark = 0;
|
---|
639 | const char *body_mark = 0;
|
---|
640 | const char *status_mark = 0;
|
---|
641 | enum state p_state = (enum state) parser->state;
|
---|
642 |
|
---|
643 | /* We're in an error state. Don't bother doing anything. */
|
---|
644 | if (HTTP_PARSER_ERRNO(parser) != HPE_OK) {
|
---|
645 | return 0;
|
---|
646 | }
|
---|
647 |
|
---|
648 | if (len == 0) {
|
---|
649 | switch (CURRENT_STATE()) {
|
---|
650 | case s_body_identity_eof:
|
---|
651 | /* Use of CALLBACK_NOTIFY() here would erroneously return 1 byte read if
|
---|
652 | * we got paused.
|
---|
653 | */
|
---|
654 | CALLBACK_NOTIFY_NOADVANCE(message_complete);
|
---|
655 | return 0;
|
---|
656 |
|
---|
657 | case s_dead:
|
---|
658 | case s_start_req_or_res:
|
---|
659 | case s_start_res:
|
---|
660 | case s_start_req:
|
---|
661 | return 0;
|
---|
662 |
|
---|
663 | default:
|
---|
664 | SET_ERRNO(HPE_INVALID_EOF_STATE);
|
---|
665 | return 1;
|
---|
666 | }
|
---|
667 | }
|
---|
668 |
|
---|
669 |
|
---|
670 | if (CURRENT_STATE() == s_header_field)
|
---|
671 | header_field_mark = data;
|
---|
672 | if (CURRENT_STATE() == s_header_value)
|
---|
673 | header_value_mark = data;
|
---|
674 | switch (CURRENT_STATE()) {
|
---|
675 | case s_req_path:
|
---|
676 | case s_req_schema:
|
---|
677 | case s_req_schema_slash:
|
---|
678 | case s_req_schema_slash_slash:
|
---|
679 | case s_req_server_start:
|
---|
680 | case s_req_server:
|
---|
681 | case s_req_server_with_at:
|
---|
682 | case s_req_query_string_start:
|
---|
683 | case s_req_query_string:
|
---|
684 | case s_req_fragment_start:
|
---|
685 | case s_req_fragment:
|
---|
686 | url_mark = data;
|
---|
687 | break;
|
---|
688 | case s_res_status:
|
---|
689 | status_mark = data;
|
---|
690 | break;
|
---|
691 | default:
|
---|
692 | break;
|
---|
693 | }
|
---|
694 |
|
---|
695 | for (p=data; p != data + len; p++) {
|
---|
696 | ch = *p;
|
---|
697 |
|
---|
698 | if (PARSING_HEADER(CURRENT_STATE()))
|
---|
699 | COUNT_HEADER_SIZE(1);
|
---|
700 |
|
---|
701 | switch (CURRENT_STATE()) {
|
---|
702 |
|
---|
703 | case s_dead:
|
---|
704 | /* this state is used after a 'Connection: close' message
|
---|
705 | * the parser will error out if it reads another message
|
---|
706 | */
|
---|
707 | if (LIKELY(ch == CR || ch == LF))
|
---|
708 | break;
|
---|
709 |
|
---|
710 | SET_ERRNO(HPE_CLOSED_CONNECTION);
|
---|
711 | goto error;
|
---|
712 |
|
---|
713 | case s_start_req_or_res:
|
---|
714 | {
|
---|
715 | if (ch == CR || ch == LF)
|
---|
716 | break;
|
---|
717 | parser->flags = 0;
|
---|
718 | parser->content_length = ULLONG_MAX;
|
---|
719 |
|
---|
720 | if (ch == 'H') {
|
---|
721 | UPDATE_STATE(s_res_or_resp_H);
|
---|
722 |
|
---|
723 | CALLBACK_NOTIFY(message_begin);
|
---|
724 | } else {
|
---|
725 | parser->type = HTTP_REQUEST;
|
---|
726 | UPDATE_STATE(s_start_req);
|
---|
727 | REEXECUTE();
|
---|
728 | }
|
---|
729 |
|
---|
730 | break;
|
---|
731 | }
|
---|
732 |
|
---|
733 | case s_res_or_resp_H:
|
---|
734 | if (ch == 'T') {
|
---|
735 | parser->type = HTTP_RESPONSE;
|
---|
736 | UPDATE_STATE(s_res_HT);
|
---|
737 | } else {
|
---|
738 | if (UNLIKELY(ch != 'E')) {
|
---|
739 | SET_ERRNO(HPE_INVALID_CONSTANT);
|
---|
740 | goto error;
|
---|
741 | }
|
---|
742 |
|
---|
743 | parser->type = HTTP_REQUEST;
|
---|
744 | parser->method = HTTP_HEAD;
|
---|
745 | parser->index = 2;
|
---|
746 | UPDATE_STATE(s_req_method);
|
---|
747 | }
|
---|
748 | break;
|
---|
749 |
|
---|
750 | case s_start_res:
|
---|
751 | {
|
---|
752 | parser->flags = 0;
|
---|
753 | parser->content_length = ULLONG_MAX;
|
---|
754 |
|
---|
755 | switch (ch) {
|
---|
756 | case 'H':
|
---|
757 | UPDATE_STATE(s_res_H);
|
---|
758 | break;
|
---|
759 |
|
---|
760 | case CR:
|
---|
761 | case LF:
|
---|
762 | break;
|
---|
763 |
|
---|
764 | default:
|
---|
765 | SET_ERRNO(HPE_INVALID_CONSTANT);
|
---|
766 | goto error;
|
---|
767 | }
|
---|
768 |
|
---|
769 | CALLBACK_NOTIFY(message_begin);
|
---|
770 | break;
|
---|
771 | }
|
---|
772 |
|
---|
773 | case s_res_H:
|
---|
774 | STRICT_CHECK(ch != 'T');
|
---|
775 | UPDATE_STATE(s_res_HT);
|
---|
776 | break;
|
---|
777 |
|
---|
778 | case s_res_HT:
|
---|
779 | STRICT_CHECK(ch != 'T');
|
---|
780 | UPDATE_STATE(s_res_HTT);
|
---|
781 | break;
|
---|
782 |
|
---|
783 | case s_res_HTT:
|
---|
784 | STRICT_CHECK(ch != 'P');
|
---|
785 | UPDATE_STATE(s_res_HTTP);
|
---|
786 | break;
|
---|
787 |
|
---|
788 | case s_res_HTTP:
|
---|
789 | STRICT_CHECK(ch != '/');
|
---|
790 | UPDATE_STATE(s_res_first_http_major);
|
---|
791 | break;
|
---|
792 |
|
---|
793 | case s_res_first_http_major:
|
---|
794 | if (UNLIKELY(ch < '0' || ch > '9')) {
|
---|
795 | SET_ERRNO(HPE_INVALID_VERSION);
|
---|
796 | goto error;
|
---|
797 | }
|
---|
798 |
|
---|
799 | parser->http_major = ch - '0';
|
---|
800 | UPDATE_STATE(s_res_http_major);
|
---|
801 | break;
|
---|
802 |
|
---|
803 | /* major HTTP version or dot */
|
---|
804 | case s_res_http_major:
|
---|
805 | {
|
---|
806 | if (ch == '.') {
|
---|
807 | UPDATE_STATE(s_res_first_http_minor);
|
---|
808 | break;
|
---|
809 | }
|
---|
810 |
|
---|
811 | if (!IS_NUM(ch)) {
|
---|
812 | SET_ERRNO(HPE_INVALID_VERSION);
|
---|
813 | goto error;
|
---|
814 | }
|
---|
815 |
|
---|
816 | parser->http_major *= 10;
|
---|
817 | parser->http_major += ch - '0';
|
---|
818 |
|
---|
819 | if (UNLIKELY(parser->http_major > 999)) {
|
---|
820 | SET_ERRNO(HPE_INVALID_VERSION);
|
---|
821 | goto error;
|
---|
822 | }
|
---|
823 |
|
---|
824 | break;
|
---|
825 | }
|
---|
826 |
|
---|
827 | /* first digit of minor HTTP version */
|
---|
828 | case s_res_first_http_minor:
|
---|
829 | if (UNLIKELY(!IS_NUM(ch))) {
|
---|
830 | SET_ERRNO(HPE_INVALID_VERSION);
|
---|
831 | goto error;
|
---|
832 | }
|
---|
833 |
|
---|
834 | parser->http_minor = ch - '0';
|
---|
835 | UPDATE_STATE(s_res_http_minor);
|
---|
836 | break;
|
---|
837 |
|
---|
838 | /* minor HTTP version or end of request line */
|
---|
839 | case s_res_http_minor:
|
---|
840 | {
|
---|
841 | if (ch == ' ') {
|
---|
842 | UPDATE_STATE(s_res_first_status_code);
|
---|
843 | break;
|
---|
844 | }
|
---|
845 |
|
---|
846 | if (UNLIKELY(!IS_NUM(ch))) {
|
---|
847 | SET_ERRNO(HPE_INVALID_VERSION);
|
---|
848 | goto error;
|
---|
849 | }
|
---|
850 |
|
---|
851 | parser->http_minor *= 10;
|
---|
852 | parser->http_minor += ch - '0';
|
---|
853 |
|
---|
854 | if (UNLIKELY(parser->http_minor > 999)) {
|
---|
855 | SET_ERRNO(HPE_INVALID_VERSION);
|
---|
856 | goto error;
|
---|
857 | }
|
---|
858 |
|
---|
859 | break;
|
---|
860 | }
|
---|
861 |
|
---|
862 | case s_res_first_status_code:
|
---|
863 | {
|
---|
864 | if (!IS_NUM(ch)) {
|
---|
865 | if (ch == ' ') {
|
---|
866 | break;
|
---|
867 | }
|
---|
868 |
|
---|
869 | SET_ERRNO(HPE_INVALID_STATUS);
|
---|
870 | goto error;
|
---|
871 | }
|
---|
872 | parser->status_code = ch - '0';
|
---|
873 | UPDATE_STATE(s_res_status_code);
|
---|
874 | break;
|
---|
875 | }
|
---|
876 |
|
---|
877 | case s_res_status_code:
|
---|
878 | {
|
---|
879 | if (!IS_NUM(ch)) {
|
---|
880 | switch (ch) {
|
---|
881 | case ' ':
|
---|
882 | UPDATE_STATE(s_res_status_start);
|
---|
883 | break;
|
---|
884 | case CR:
|
---|
885 | UPDATE_STATE(s_res_line_almost_done);
|
---|
886 | break;
|
---|
887 | case LF:
|
---|
888 | UPDATE_STATE(s_header_field_start);
|
---|
889 | break;
|
---|
890 | default:
|
---|
891 | SET_ERRNO(HPE_INVALID_STATUS);
|
---|
892 | goto error;
|
---|
893 | }
|
---|
894 | break;
|
---|
895 | }
|
---|
896 |
|
---|
897 | parser->status_code *= 10;
|
---|
898 | parser->status_code += ch - '0';
|
---|
899 |
|
---|
900 | if (UNLIKELY(parser->status_code > 999)) {
|
---|
901 | SET_ERRNO(HPE_INVALID_STATUS);
|
---|
902 | goto error;
|
---|
903 | }
|
---|
904 |
|
---|
905 | break;
|
---|
906 | }
|
---|
907 |
|
---|
908 | case s_res_status_start:
|
---|
909 | {
|
---|
910 | if (ch == CR) {
|
---|
911 | UPDATE_STATE(s_res_line_almost_done);
|
---|
912 | break;
|
---|
913 | }
|
---|
914 |
|
---|
915 | if (ch == LF) {
|
---|
916 | UPDATE_STATE(s_header_field_start);
|
---|
917 | break;
|
---|
918 | }
|
---|
919 |
|
---|
920 | MARK(status);
|
---|
921 | UPDATE_STATE(s_res_status);
|
---|
922 | parser->index = 0;
|
---|
923 | break;
|
---|
924 | }
|
---|
925 |
|
---|
926 | case s_res_status:
|
---|
927 | if (ch == CR) {
|
---|
928 | UPDATE_STATE(s_res_line_almost_done);
|
---|
929 | CALLBACK_DATA(status);
|
---|
930 | break;
|
---|
931 | }
|
---|
932 |
|
---|
933 | if (ch == LF) {
|
---|
934 | UPDATE_STATE(s_header_field_start);
|
---|
935 | CALLBACK_DATA(status);
|
---|
936 | break;
|
---|
937 | }
|
---|
938 |
|
---|
939 | break;
|
---|
940 |
|
---|
941 | case s_res_line_almost_done:
|
---|
942 | STRICT_CHECK(ch != LF);
|
---|
943 | UPDATE_STATE(s_header_field_start);
|
---|
944 | break;
|
---|
945 |
|
---|
946 | case s_start_req:
|
---|
947 | {
|
---|
948 | if (ch == CR || ch == LF)
|
---|
949 | break;
|
---|
950 | parser->flags = 0;
|
---|
951 | parser->content_length = ULLONG_MAX;
|
---|
952 |
|
---|
953 | if (UNLIKELY(!IS_ALPHA(ch))) {
|
---|
954 | SET_ERRNO(HPE_INVALID_METHOD);
|
---|
955 | goto error;
|
---|
956 | }
|
---|
957 |
|
---|
958 | parser->method = (enum http_method) 0;
|
---|
959 | parser->index = 1;
|
---|
960 | switch (ch) {
|
---|
961 | case 'C': parser->method = HTTP_CONNECT; /* or COPY, CHECKOUT */ break;
|
---|
962 | case 'D': parser->method = HTTP_DELETE; break;
|
---|
963 | case 'G': parser->method = HTTP_GET; break;
|
---|
964 | case 'H': parser->method = HTTP_HEAD; break;
|
---|
965 | case 'L': parser->method = HTTP_LOCK; break;
|
---|
966 | case 'M': parser->method = HTTP_MKCOL; /* or MOVE, MKACTIVITY, MERGE, M-SEARCH, MKCALENDAR */ break;
|
---|
967 | case 'N': parser->method = HTTP_NOTIFY; break;
|
---|
968 | case 'O': parser->method = HTTP_OPTIONS; break;
|
---|
969 | case 'P': parser->method = HTTP_POST;
|
---|
970 | /* or PROPFIND|PROPPATCH|PUT|PATCH|PURGE */
|
---|
971 | break;
|
---|
972 | case 'R': parser->method = HTTP_REPORT; break;
|
---|
973 | case 'S': parser->method = HTTP_SUBSCRIBE; /* or SEARCH */ break;
|
---|
974 | case 'T': parser->method = HTTP_TRACE; break;
|
---|
975 | case 'U': parser->method = HTTP_UNLOCK; /* or UNSUBSCRIBE */ break;
|
---|
976 | default:
|
---|
977 | SET_ERRNO(HPE_INVALID_METHOD);
|
---|
978 | goto error;
|
---|
979 | }
|
---|
980 | UPDATE_STATE(s_req_method);
|
---|
981 |
|
---|
982 | CALLBACK_NOTIFY(message_begin);
|
---|
983 |
|
---|
984 | break;
|
---|
985 | }
|
---|
986 |
|
---|
987 | case s_req_method:
|
---|
988 | {
|
---|
989 | const char *matcher;
|
---|
990 | if (UNLIKELY(ch == '\0')) {
|
---|
991 | SET_ERRNO(HPE_INVALID_METHOD);
|
---|
992 | goto error;
|
---|
993 | }
|
---|
994 |
|
---|
995 | matcher = method_strings[parser->method];
|
---|
996 | if (ch == ' ' && matcher[parser->index] == '\0') {
|
---|
997 | UPDATE_STATE(s_req_spaces_before_url);
|
---|
998 | } else if (ch == matcher[parser->index]) {
|
---|
999 | ; /* nada */
|
---|
1000 | } else if (parser->method == HTTP_CONNECT) {
|
---|
1001 | if (parser->index == 1 && ch == 'H') {
|
---|
1002 | parser->method = HTTP_CHECKOUT;
|
---|
1003 | } else if (parser->index == 2 && ch == 'P') {
|
---|
1004 | parser->method = HTTP_COPY;
|
---|
1005 | } else {
|
---|
1006 | SET_ERRNO(HPE_INVALID_METHOD);
|
---|
1007 | goto error;
|
---|
1008 | }
|
---|
1009 | } else if (parser->method == HTTP_MKCOL) {
|
---|
1010 | if (parser->index == 1 && ch == 'O') {
|
---|
1011 | parser->method = HTTP_MOVE;
|
---|
1012 | } else if (parser->index == 1 && ch == 'E') {
|
---|
1013 | parser->method = HTTP_MERGE;
|
---|
1014 | } else if (parser->index == 1 && ch == '-') {
|
---|
1015 | parser->method = HTTP_MSEARCH;
|
---|
1016 | } else if (parser->index == 2 && ch == 'A') {
|
---|
1017 | parser->method = HTTP_MKACTIVITY;
|
---|
1018 | } else if (parser->index == 3 && ch == 'A') {
|
---|
1019 | parser->method = HTTP_MKCALENDAR;
|
---|
1020 | } else {
|
---|
1021 | SET_ERRNO(HPE_INVALID_METHOD);
|
---|
1022 | goto error;
|
---|
1023 | }
|
---|
1024 | } else if (parser->method == HTTP_SUBSCRIBE) {
|
---|
1025 | if (parser->index == 1 && ch == 'E') {
|
---|
1026 | parser->method = HTTP_SEARCH;
|
---|
1027 | } else {
|
---|
1028 | SET_ERRNO(HPE_INVALID_METHOD);
|
---|
1029 | goto error;
|
---|
1030 | }
|
---|
1031 | } else if (parser->index == 1 && parser->method == HTTP_POST) {
|
---|
1032 | if (ch == 'R') {
|
---|
1033 | parser->method = HTTP_PROPFIND; /* or HTTP_PROPPATCH */
|
---|
1034 | } else if (ch == 'U') {
|
---|
1035 | parser->method = HTTP_PUT; /* or HTTP_PURGE */
|
---|
1036 | } else if (ch == 'A') {
|
---|
1037 | parser->method = HTTP_PATCH;
|
---|
1038 | } else {
|
---|
1039 | SET_ERRNO(HPE_INVALID_METHOD);
|
---|
1040 | goto error;
|
---|
1041 | }
|
---|
1042 | } else if (parser->index == 2) {
|
---|
1043 | if (parser->method == HTTP_PUT) {
|
---|
1044 | if (ch == 'R') {
|
---|
1045 | parser->method = HTTP_PURGE;
|
---|
1046 | } else {
|
---|
1047 | SET_ERRNO(HPE_INVALID_METHOD);
|
---|
1048 | goto error;
|
---|
1049 | }
|
---|
1050 | } else if (parser->method == HTTP_UNLOCK) {
|
---|
1051 | if (ch == 'S') {
|
---|
1052 | parser->method = HTTP_UNSUBSCRIBE;
|
---|
1053 | } else {
|
---|
1054 | SET_ERRNO(HPE_INVALID_METHOD);
|
---|
1055 | goto error;
|
---|
1056 | }
|
---|
1057 | } else {
|
---|
1058 | SET_ERRNO(HPE_INVALID_METHOD);
|
---|
1059 | goto error;
|
---|
1060 | }
|
---|
1061 | } else if (parser->index == 4 && parser->method == HTTP_PROPFIND && ch == 'P') {
|
---|
1062 | parser->method = HTTP_PROPPATCH;
|
---|
1063 | } else {
|
---|
1064 | SET_ERRNO(HPE_INVALID_METHOD);
|
---|
1065 | goto error;
|
---|
1066 | }
|
---|
1067 |
|
---|
1068 | ++parser->index;
|
---|
1069 | break;
|
---|
1070 | }
|
---|
1071 |
|
---|
1072 | case s_req_spaces_before_url:
|
---|
1073 | {
|
---|
1074 | if (ch == ' ') break;
|
---|
1075 |
|
---|
1076 | MARK(url);
|
---|
1077 | if (parser->method == HTTP_CONNECT) {
|
---|
1078 | UPDATE_STATE(s_req_server_start);
|
---|
1079 | }
|
---|
1080 |
|
---|
1081 | UPDATE_STATE(parse_url_char(CURRENT_STATE(), ch));
|
---|
1082 | if (UNLIKELY(CURRENT_STATE() == s_dead)) {
|
---|
1083 | SET_ERRNO(HPE_INVALID_URL);
|
---|
1084 | goto error;
|
---|
1085 | }
|
---|
1086 |
|
---|
1087 | break;
|
---|
1088 | }
|
---|
1089 |
|
---|
1090 | case s_req_schema:
|
---|
1091 | case s_req_schema_slash:
|
---|
1092 | case s_req_schema_slash_slash:
|
---|
1093 | case s_req_server_start:
|
---|
1094 | {
|
---|
1095 | switch (ch) {
|
---|
1096 | /* No whitespace allowed here */
|
---|
1097 | case ' ':
|
---|
1098 | case CR:
|
---|
1099 | case LF:
|
---|
1100 | SET_ERRNO(HPE_INVALID_URL);
|
---|
1101 | goto error;
|
---|
1102 | default:
|
---|
1103 | UPDATE_STATE(parse_url_char(CURRENT_STATE(), ch));
|
---|
1104 | if (UNLIKELY(CURRENT_STATE() == s_dead)) {
|
---|
1105 | SET_ERRNO(HPE_INVALID_URL);
|
---|
1106 | goto error;
|
---|
1107 | }
|
---|
1108 | }
|
---|
1109 |
|
---|
1110 | break;
|
---|
1111 | }
|
---|
1112 |
|
---|
1113 | case s_req_server:
|
---|
1114 | case s_req_server_with_at:
|
---|
1115 | case s_req_path:
|
---|
1116 | case s_req_query_string_start:
|
---|
1117 | case s_req_query_string:
|
---|
1118 | case s_req_fragment_start:
|
---|
1119 | case s_req_fragment:
|
---|
1120 | {
|
---|
1121 | switch (ch) {
|
---|
1122 | case ' ':
|
---|
1123 | UPDATE_STATE(s_req_http_start);
|
---|
1124 | CALLBACK_DATA(url);
|
---|
1125 | break;
|
---|
1126 | case CR:
|
---|
1127 | case LF:
|
---|
1128 | parser->http_major = 0;
|
---|
1129 | parser->http_minor = 9;
|
---|
1130 | UPDATE_STATE((ch == CR) ?
|
---|
1131 | s_req_line_almost_done :
|
---|
1132 | s_header_field_start);
|
---|
1133 | CALLBACK_DATA(url);
|
---|
1134 | break;
|
---|
1135 | default:
|
---|
1136 | UPDATE_STATE(parse_url_char(CURRENT_STATE(), ch));
|
---|
1137 | if (UNLIKELY(CURRENT_STATE() == s_dead)) {
|
---|
1138 | SET_ERRNO(HPE_INVALID_URL);
|
---|
1139 | goto error;
|
---|
1140 | }
|
---|
1141 | }
|
---|
1142 | break;
|
---|
1143 | }
|
---|
1144 |
|
---|
1145 | case s_req_http_start:
|
---|
1146 | switch (ch) {
|
---|
1147 | case 'H':
|
---|
1148 | UPDATE_STATE(s_req_http_H);
|
---|
1149 | break;
|
---|
1150 | case ' ':
|
---|
1151 | break;
|
---|
1152 | default:
|
---|
1153 | SET_ERRNO(HPE_INVALID_CONSTANT);
|
---|
1154 | goto error;
|
---|
1155 | }
|
---|
1156 | break;
|
---|
1157 |
|
---|
1158 | case s_req_http_H:
|
---|
1159 | STRICT_CHECK(ch != 'T');
|
---|
1160 | UPDATE_STATE(s_req_http_HT);
|
---|
1161 | break;
|
---|
1162 |
|
---|
1163 | case s_req_http_HT:
|
---|
1164 | STRICT_CHECK(ch != 'T');
|
---|
1165 | UPDATE_STATE(s_req_http_HTT);
|
---|
1166 | break;
|
---|
1167 |
|
---|
1168 | case s_req_http_HTT:
|
---|
1169 | STRICT_CHECK(ch != 'P');
|
---|
1170 | UPDATE_STATE(s_req_http_HTTP);
|
---|
1171 | break;
|
---|
1172 |
|
---|
1173 | case s_req_http_HTTP:
|
---|
1174 | STRICT_CHECK(ch != '/');
|
---|
1175 | UPDATE_STATE(s_req_first_http_major);
|
---|
1176 | break;
|
---|
1177 |
|
---|
1178 | /* first digit of major HTTP version */
|
---|
1179 | case s_req_first_http_major:
|
---|
1180 | if (UNLIKELY(ch < '1' || ch > '9')) {
|
---|
1181 | SET_ERRNO(HPE_INVALID_VERSION);
|
---|
1182 | goto error;
|
---|
1183 | }
|
---|
1184 |
|
---|
1185 | parser->http_major = ch - '0';
|
---|
1186 | UPDATE_STATE(s_req_http_major);
|
---|
1187 | break;
|
---|
1188 |
|
---|
1189 | /* major HTTP version or dot */
|
---|
1190 | case s_req_http_major:
|
---|
1191 | {
|
---|
1192 | if (ch == '.') {
|
---|
1193 | UPDATE_STATE(s_req_first_http_minor);
|
---|
1194 | break;
|
---|
1195 | }
|
---|
1196 |
|
---|
1197 | if (UNLIKELY(!IS_NUM(ch))) {
|
---|
1198 | SET_ERRNO(HPE_INVALID_VERSION);
|
---|
1199 | goto error;
|
---|
1200 | }
|
---|
1201 |
|
---|
1202 | parser->http_major *= 10;
|
---|
1203 | parser->http_major += ch - '0';
|
---|
1204 |
|
---|
1205 | if (UNLIKELY(parser->http_major > 999)) {
|
---|
1206 | SET_ERRNO(HPE_INVALID_VERSION);
|
---|
1207 | goto error;
|
---|
1208 | }
|
---|
1209 |
|
---|
1210 | break;
|
---|
1211 | }
|
---|
1212 |
|
---|
1213 | /* first digit of minor HTTP version */
|
---|
1214 | case s_req_first_http_minor:
|
---|
1215 | if (UNLIKELY(!IS_NUM(ch))) {
|
---|
1216 | SET_ERRNO(HPE_INVALID_VERSION);
|
---|
1217 | goto error;
|
---|
1218 | }
|
---|
1219 |
|
---|
1220 | parser->http_minor = ch - '0';
|
---|
1221 | UPDATE_STATE(s_req_http_minor);
|
---|
1222 | break;
|
---|
1223 |
|
---|
1224 | /* minor HTTP version or end of request line */
|
---|
1225 | case s_req_http_minor:
|
---|
1226 | {
|
---|
1227 | if (ch == CR) {
|
---|
1228 | UPDATE_STATE(s_req_line_almost_done);
|
---|
1229 | break;
|
---|
1230 | }
|
---|
1231 |
|
---|
1232 | if (ch == LF) {
|
---|
1233 | UPDATE_STATE(s_header_field_start);
|
---|
1234 | break;
|
---|
1235 | }
|
---|
1236 |
|
---|
1237 | /* XXX allow spaces after digit? */
|
---|
1238 |
|
---|
1239 | if (UNLIKELY(!IS_NUM(ch))) {
|
---|
1240 | SET_ERRNO(HPE_INVALID_VERSION);
|
---|
1241 | goto error;
|
---|
1242 | }
|
---|
1243 |
|
---|
1244 | parser->http_minor *= 10;
|
---|
1245 | parser->http_minor += ch - '0';
|
---|
1246 |
|
---|
1247 | if (UNLIKELY(parser->http_minor > 999)) {
|
---|
1248 | SET_ERRNO(HPE_INVALID_VERSION);
|
---|
1249 | goto error;
|
---|
1250 | }
|
---|
1251 |
|
---|
1252 | break;
|
---|
1253 | }
|
---|
1254 |
|
---|
1255 | /* end of request line */
|
---|
1256 | case s_req_line_almost_done:
|
---|
1257 | {
|
---|
1258 | if (UNLIKELY(ch != LF)) {
|
---|
1259 | SET_ERRNO(HPE_LF_EXPECTED);
|
---|
1260 | goto error;
|
---|
1261 | }
|
---|
1262 |
|
---|
1263 | UPDATE_STATE(s_header_field_start);
|
---|
1264 | break;
|
---|
1265 | }
|
---|
1266 |
|
---|
1267 | case s_header_field_start:
|
---|
1268 | {
|
---|
1269 | if (ch == CR) {
|
---|
1270 | UPDATE_STATE(s_headers_almost_done);
|
---|
1271 | break;
|
---|
1272 | }
|
---|
1273 |
|
---|
1274 | if (ch == LF) {
|
---|
1275 | /* they might be just sending \n instead of \r\n so this would be
|
---|
1276 | * the second \n to denote the end of headers*/
|
---|
1277 | UPDATE_STATE(s_headers_almost_done);
|
---|
1278 | REEXECUTE();
|
---|
1279 | }
|
---|
1280 |
|
---|
1281 | c = TOKEN(ch);
|
---|
1282 |
|
---|
1283 | if (UNLIKELY(!c)) {
|
---|
1284 | SET_ERRNO(HPE_INVALID_HEADER_TOKEN);
|
---|
1285 | goto error;
|
---|
1286 | }
|
---|
1287 |
|
---|
1288 | MARK(header_field);
|
---|
1289 |
|
---|
1290 | parser->index = 0;
|
---|
1291 | UPDATE_STATE(s_header_field);
|
---|
1292 |
|
---|
1293 | switch (c) {
|
---|
1294 | case 'c':
|
---|
1295 | parser->header_state = h_C;
|
---|
1296 | break;
|
---|
1297 |
|
---|
1298 | case 'p':
|
---|
1299 | parser->header_state = h_matching_proxy_connection;
|
---|
1300 | break;
|
---|
1301 |
|
---|
1302 | case 't':
|
---|
1303 | parser->header_state = h_matching_transfer_encoding;
|
---|
1304 | break;
|
---|
1305 |
|
---|
1306 | case 'u':
|
---|
1307 | parser->header_state = h_matching_upgrade;
|
---|
1308 | break;
|
---|
1309 |
|
---|
1310 | default:
|
---|
1311 | parser->header_state = h_general;
|
---|
1312 | break;
|
---|
1313 | }
|
---|
1314 | break;
|
---|
1315 | }
|
---|
1316 |
|
---|
1317 | case s_header_field:
|
---|
1318 | {
|
---|
1319 | const char* start = p;
|
---|
1320 | for (; p != data + len; p++) {
|
---|
1321 | ch = *p;
|
---|
1322 | c = TOKEN(ch);
|
---|
1323 |
|
---|
1324 | if (!c)
|
---|
1325 | break;
|
---|
1326 |
|
---|
1327 | switch (parser->header_state) {
|
---|
1328 | case h_general:
|
---|
1329 | break;
|
---|
1330 |
|
---|
1331 | case h_C:
|
---|
1332 | parser->index++;
|
---|
1333 | parser->header_state = (c == 'o' ? h_CO : h_general);
|
---|
1334 | break;
|
---|
1335 |
|
---|
1336 | case h_CO:
|
---|
1337 | parser->index++;
|
---|
1338 | parser->header_state = (c == 'n' ? h_CON : h_general);
|
---|
1339 | break;
|
---|
1340 |
|
---|
1341 | case h_CON:
|
---|
1342 | parser->index++;
|
---|
1343 | switch (c) {
|
---|
1344 | case 'n':
|
---|
1345 | parser->header_state = h_matching_connection;
|
---|
1346 | break;
|
---|
1347 | case 't':
|
---|
1348 | parser->header_state = h_matching_content_length;
|
---|
1349 | break;
|
---|
1350 | default:
|
---|
1351 | parser->header_state = h_general;
|
---|
1352 | break;
|
---|
1353 | }
|
---|
1354 | break;
|
---|
1355 |
|
---|
1356 | /* connection */
|
---|
1357 |
|
---|
1358 | case h_matching_connection:
|
---|
1359 | parser->index++;
|
---|
1360 | if (parser->index > sizeof(CONNECTION)-1
|
---|
1361 | || c != CONNECTION[parser->index]) {
|
---|
1362 | parser->header_state = h_general;
|
---|
1363 | } else if (parser->index == sizeof(CONNECTION)-2) {
|
---|
1364 | parser->header_state = h_connection;
|
---|
1365 | }
|
---|
1366 | break;
|
---|
1367 |
|
---|
1368 | /* proxy-connection */
|
---|
1369 |
|
---|
1370 | case h_matching_proxy_connection:
|
---|
1371 | parser->index++;
|
---|
1372 | if (parser->index > sizeof(PROXY_CONNECTION)-1
|
---|
1373 | || c != PROXY_CONNECTION[parser->index]) {
|
---|
1374 | parser->header_state = h_general;
|
---|
1375 | } else if (parser->index == sizeof(PROXY_CONNECTION)-2) {
|
---|
1376 | parser->header_state = h_connection;
|
---|
1377 | }
|
---|
1378 | break;
|
---|
1379 |
|
---|
1380 | /* content-length */
|
---|
1381 |
|
---|
1382 | case h_matching_content_length:
|
---|
1383 | parser->index++;
|
---|
1384 | if (parser->index > sizeof(CONTENT_LENGTH)-1
|
---|
1385 | || c != CONTENT_LENGTH[parser->index]) {
|
---|
1386 | parser->header_state = h_general;
|
---|
1387 | } else if (parser->index == sizeof(CONTENT_LENGTH)-2) {
|
---|
1388 | parser->header_state = h_content_length;
|
---|
1389 | }
|
---|
1390 | break;
|
---|
1391 |
|
---|
1392 | /* transfer-encoding */
|
---|
1393 |
|
---|
1394 | case h_matching_transfer_encoding:
|
---|
1395 | parser->index++;
|
---|
1396 | if (parser->index > sizeof(TRANSFER_ENCODING)-1
|
---|
1397 | || c != TRANSFER_ENCODING[parser->index]) {
|
---|
1398 | parser->header_state = h_general;
|
---|
1399 | } else if (parser->index == sizeof(TRANSFER_ENCODING)-2) {
|
---|
1400 | parser->header_state = h_transfer_encoding;
|
---|
1401 | }
|
---|
1402 | break;
|
---|
1403 |
|
---|
1404 | /* upgrade */
|
---|
1405 |
|
---|
1406 | case h_matching_upgrade:
|
---|
1407 | parser->index++;
|
---|
1408 | if (parser->index > sizeof(UPGRADE)-1
|
---|
1409 | || c != UPGRADE[parser->index]) {
|
---|
1410 | parser->header_state = h_general;
|
---|
1411 | } else if (parser->index == sizeof(UPGRADE)-2) {
|
---|
1412 | parser->header_state = h_upgrade;
|
---|
1413 | }
|
---|
1414 | break;
|
---|
1415 |
|
---|
1416 | case h_connection:
|
---|
1417 | case h_content_length:
|
---|
1418 | case h_transfer_encoding:
|
---|
1419 | case h_upgrade:
|
---|
1420 | if (ch != ' ') parser->header_state = h_general;
|
---|
1421 | break;
|
---|
1422 |
|
---|
1423 | default:
|
---|
1424 | assert(0 && "Unknown header_state");
|
---|
1425 | break;
|
---|
1426 | }
|
---|
1427 | }
|
---|
1428 |
|
---|
1429 | COUNT_HEADER_SIZE(p - start);
|
---|
1430 |
|
---|
1431 | if (p == data + len) {
|
---|
1432 | --p;
|
---|
1433 | break;
|
---|
1434 | }
|
---|
1435 |
|
---|
1436 | if (ch == ':') {
|
---|
1437 | UPDATE_STATE(s_header_value_discard_ws);
|
---|
1438 | CALLBACK_DATA(header_field);
|
---|
1439 | break;
|
---|
1440 | }
|
---|
1441 |
|
---|
1442 | SET_ERRNO(HPE_INVALID_HEADER_TOKEN);
|
---|
1443 | goto error;
|
---|
1444 | }
|
---|
1445 |
|
---|
1446 | case s_header_value_discard_ws:
|
---|
1447 | if (ch == ' ' || ch == '\t') break;
|
---|
1448 |
|
---|
1449 | if (ch == CR) {
|
---|
1450 | UPDATE_STATE(s_header_value_discard_ws_almost_done);
|
---|
1451 | break;
|
---|
1452 | }
|
---|
1453 |
|
---|
1454 | if (ch == LF) {
|
---|
1455 | UPDATE_STATE(s_header_value_discard_lws);
|
---|
1456 | break;
|
---|
1457 | }
|
---|
1458 |
|
---|
1459 | /* FALLTHROUGH */
|
---|
1460 |
|
---|
1461 | case s_header_value_start:
|
---|
1462 | {
|
---|
1463 | MARK(header_value);
|
---|
1464 |
|
---|
1465 | UPDATE_STATE(s_header_value);
|
---|
1466 | parser->index = 0;
|
---|
1467 |
|
---|
1468 | c = LOWER(ch);
|
---|
1469 |
|
---|
1470 | switch (parser->header_state) {
|
---|
1471 | case h_upgrade:
|
---|
1472 | parser->flags |= F_UPGRADE;
|
---|
1473 | parser->header_state = h_general;
|
---|
1474 | break;
|
---|
1475 |
|
---|
1476 | case h_transfer_encoding:
|
---|
1477 | /* looking for 'Transfer-Encoding: chunked' */
|
---|
1478 | if ('c' == c) {
|
---|
1479 | parser->header_state = h_matching_transfer_encoding_chunked;
|
---|
1480 | } else {
|
---|
1481 | parser->header_state = h_general;
|
---|
1482 | }
|
---|
1483 | break;
|
---|
1484 |
|
---|
1485 | case h_content_length:
|
---|
1486 | if (UNLIKELY(!IS_NUM(ch))) {
|
---|
1487 | SET_ERRNO(HPE_INVALID_CONTENT_LENGTH);
|
---|
1488 | goto error;
|
---|
1489 | }
|
---|
1490 |
|
---|
1491 | parser->content_length = ch - '0';
|
---|
1492 | break;
|
---|
1493 |
|
---|
1494 | case h_connection:
|
---|
1495 | /* looking for 'Connection: keep-alive' */
|
---|
1496 | if (c == 'k') {
|
---|
1497 | parser->header_state = h_matching_connection_keep_alive;
|
---|
1498 | /* looking for 'Connection: close' */
|
---|
1499 | } else if (c == 'c') {
|
---|
1500 | parser->header_state = h_matching_connection_close;
|
---|
1501 | } else if (c == 'u') {
|
---|
1502 | parser->header_state = h_matching_connection_upgrade;
|
---|
1503 | } else {
|
---|
1504 | parser->header_state = h_matching_connection_token;
|
---|
1505 | }
|
---|
1506 | break;
|
---|
1507 |
|
---|
1508 | /* Multi-value `Connection` header */
|
---|
1509 | case h_matching_connection_token_start:
|
---|
1510 | break;
|
---|
1511 |
|
---|
1512 | default:
|
---|
1513 | parser->header_state = h_general;
|
---|
1514 | break;
|
---|
1515 | }
|
---|
1516 | break;
|
---|
1517 | }
|
---|
1518 |
|
---|
1519 | case s_header_value:
|
---|
1520 | {
|
---|
1521 | const char* start = p;
|
---|
1522 | enum header_states h_state = (enum header_states) parser->header_state;
|
---|
1523 | for (; p != data + len; p++) {
|
---|
1524 | ch = *p;
|
---|
1525 | if (ch == CR) {
|
---|
1526 | UPDATE_STATE(s_header_almost_done);
|
---|
1527 | parser->header_state = h_state;
|
---|
1528 | CALLBACK_DATA(header_value);
|
---|
1529 | break;
|
---|
1530 | }
|
---|
1531 |
|
---|
1532 | if (ch == LF) {
|
---|
1533 | UPDATE_STATE(s_header_almost_done);
|
---|
1534 | COUNT_HEADER_SIZE(p - start);
|
---|
1535 | parser->header_state = h_state;
|
---|
1536 | CALLBACK_DATA_NOADVANCE(header_value);
|
---|
1537 | REEXECUTE();
|
---|
1538 | }
|
---|
1539 |
|
---|
1540 | c = LOWER(ch);
|
---|
1541 |
|
---|
1542 | switch (h_state) {
|
---|
1543 | case h_general:
|
---|
1544 | {
|
---|
1545 | const char* p_cr;
|
---|
1546 | const char* p_lf;
|
---|
1547 | size_t limit = data + len - p;
|
---|
1548 |
|
---|
1549 | limit = MIN(limit, HTTP_MAX_HEADER_SIZE);
|
---|
1550 |
|
---|
1551 | p_cr = (const char*) memchr(p, CR, limit);
|
---|
1552 | p_lf = (const char*) memchr(p, LF, limit);
|
---|
1553 | if (p_cr != NULL) {
|
---|
1554 | if (p_lf != NULL && p_cr >= p_lf)
|
---|
1555 | p = p_lf;
|
---|
1556 | else
|
---|
1557 | p = p_cr;
|
---|
1558 | } else if (UNLIKELY(p_lf != NULL)) {
|
---|
1559 | p = p_lf;
|
---|
1560 | } else {
|
---|
1561 | p = data + len;
|
---|
1562 | }
|
---|
1563 | --p;
|
---|
1564 |
|
---|
1565 | break;
|
---|
1566 | }
|
---|
1567 |
|
---|
1568 | case h_connection:
|
---|
1569 | case h_transfer_encoding:
|
---|
1570 | assert(0 && "Shouldn't get here.");
|
---|
1571 | break;
|
---|
1572 |
|
---|
1573 | case h_content_length:
|
---|
1574 | {
|
---|
1575 | uint64_t t;
|
---|
1576 |
|
---|
1577 | if (ch == ' ') break;
|
---|
1578 |
|
---|
1579 | if (UNLIKELY(!IS_NUM(ch))) {
|
---|
1580 | SET_ERRNO(HPE_INVALID_CONTENT_LENGTH);
|
---|
1581 | parser->header_state = h_state;
|
---|
1582 | goto error;
|
---|
1583 | }
|
---|
1584 |
|
---|
1585 | t = parser->content_length;
|
---|
1586 | t *= 10;
|
---|
1587 | t += ch - '0';
|
---|
1588 |
|
---|
1589 | /* Overflow? Test against a conservative limit for simplicity. */
|
---|
1590 | if (UNLIKELY((ULLONG_MAX - 10) / 10 < parser->content_length)) {
|
---|
1591 | SET_ERRNO(HPE_INVALID_CONTENT_LENGTH);
|
---|
1592 | parser->header_state = h_state;
|
---|
1593 | goto error;
|
---|
1594 | }
|
---|
1595 |
|
---|
1596 | parser->content_length = t;
|
---|
1597 | break;
|
---|
1598 | }
|
---|
1599 |
|
---|
1600 | /* Transfer-Encoding: chunked */
|
---|
1601 | case h_matching_transfer_encoding_chunked:
|
---|
1602 | parser->index++;
|
---|
1603 | if (parser->index > sizeof(CHUNKED)-1
|
---|
1604 | || c != CHUNKED[parser->index]) {
|
---|
1605 | h_state = h_general;
|
---|
1606 | } else if (parser->index == sizeof(CHUNKED)-2) {
|
---|
1607 | h_state = h_transfer_encoding_chunked;
|
---|
1608 | }
|
---|
1609 | break;
|
---|
1610 |
|
---|
1611 | case h_matching_connection_token_start:
|
---|
1612 | /* looking for 'Connection: keep-alive' */
|
---|
1613 | if (c == 'k') {
|
---|
1614 | h_state = h_matching_connection_keep_alive;
|
---|
1615 | /* looking for 'Connection: close' */
|
---|
1616 | } else if (c == 'c') {
|
---|
1617 | h_state = h_matching_connection_close;
|
---|
1618 | } else if (c == 'u') {
|
---|
1619 | h_state = h_matching_connection_upgrade;
|
---|
1620 | } else if (STRICT_TOKEN(c)) {
|
---|
1621 | h_state = h_matching_connection_token;
|
---|
1622 | } else {
|
---|
1623 | h_state = h_general;
|
---|
1624 | }
|
---|
1625 | break;
|
---|
1626 |
|
---|
1627 | /* looking for 'Connection: keep-alive' */
|
---|
1628 | case h_matching_connection_keep_alive:
|
---|
1629 | parser->index++;
|
---|
1630 | if (parser->index > sizeof(KEEP_ALIVE)-1
|
---|
1631 | || c != KEEP_ALIVE[parser->index]) {
|
---|
1632 | h_state = h_matching_connection_token;
|
---|
1633 | } else if (parser->index == sizeof(KEEP_ALIVE)-2) {
|
---|
1634 | h_state = h_connection_keep_alive;
|
---|
1635 | }
|
---|
1636 | break;
|
---|
1637 |
|
---|
1638 | /* looking for 'Connection: close' */
|
---|
1639 | case h_matching_connection_close:
|
---|
1640 | parser->index++;
|
---|
1641 | if (parser->index > sizeof(CLOSE)-1 || c != CLOSE[parser->index]) {
|
---|
1642 | h_state = h_matching_connection_token;
|
---|
1643 | } else if (parser->index == sizeof(CLOSE)-2) {
|
---|
1644 | h_state = h_connection_close;
|
---|
1645 | }
|
---|
1646 | break;
|
---|
1647 |
|
---|
1648 | /* looking for 'Connection: upgrade' */
|
---|
1649 | case h_matching_connection_upgrade:
|
---|
1650 | parser->index++;
|
---|
1651 | if (parser->index > sizeof(UPGRADE) - 1 ||
|
---|
1652 | c != UPGRADE[parser->index]) {
|
---|
1653 | h_state = h_matching_connection_token;
|
---|
1654 | } else if (parser->index == sizeof(UPGRADE)-2) {
|
---|
1655 | h_state = h_connection_upgrade;
|
---|
1656 | }
|
---|
1657 | break;
|
---|
1658 |
|
---|
1659 | case h_matching_connection_token:
|
---|
1660 | if (ch == ',') {
|
---|
1661 | h_state = h_matching_connection_token_start;
|
---|
1662 | parser->index = 0;
|
---|
1663 | }
|
---|
1664 | break;
|
---|
1665 |
|
---|
1666 | case h_transfer_encoding_chunked:
|
---|
1667 | if (ch != ' ') h_state = h_general;
|
---|
1668 | break;
|
---|
1669 |
|
---|
1670 | case h_connection_keep_alive:
|
---|
1671 | case h_connection_close:
|
---|
1672 | case h_connection_upgrade:
|
---|
1673 | if (ch == ',') {
|
---|
1674 | if (h_state == h_connection_keep_alive) {
|
---|
1675 | parser->flags |= F_CONNECTION_KEEP_ALIVE;
|
---|
1676 | } else if (h_state == h_connection_close) {
|
---|
1677 | parser->flags |= F_CONNECTION_CLOSE;
|
---|
1678 | } else if (h_state == h_connection_upgrade) {
|
---|
1679 | parser->flags |= F_CONNECTION_UPGRADE;
|
---|
1680 | }
|
---|
1681 | h_state = h_matching_connection_token_start;
|
---|
1682 | parser->index = 0;
|
---|
1683 | } else if (ch != ' ') {
|
---|
1684 | h_state = h_matching_connection_token;
|
---|
1685 | }
|
---|
1686 | break;
|
---|
1687 |
|
---|
1688 | default:
|
---|
1689 | UPDATE_STATE(s_header_value);
|
---|
1690 | h_state = h_general;
|
---|
1691 | break;
|
---|
1692 | }
|
---|
1693 | }
|
---|
1694 | parser->header_state = h_state;
|
---|
1695 |
|
---|
1696 | COUNT_HEADER_SIZE(p - start);
|
---|
1697 |
|
---|
1698 | if (p == data + len)
|
---|
1699 | --p;
|
---|
1700 | break;
|
---|
1701 | }
|
---|
1702 |
|
---|
1703 | case s_header_almost_done:
|
---|
1704 | {
|
---|
1705 | STRICT_CHECK(ch != LF);
|
---|
1706 |
|
---|
1707 | UPDATE_STATE(s_header_value_lws);
|
---|
1708 | break;
|
---|
1709 | }
|
---|
1710 |
|
---|
1711 | case s_header_value_lws:
|
---|
1712 | {
|
---|
1713 | if (ch == ' ' || ch == '\t') {
|
---|
1714 | UPDATE_STATE(s_header_value_start);
|
---|
1715 | REEXECUTE();
|
---|
1716 | }
|
---|
1717 |
|
---|
1718 | /* finished the header */
|
---|
1719 | switch (parser->header_state) {
|
---|
1720 | case h_connection_keep_alive:
|
---|
1721 | parser->flags |= F_CONNECTION_KEEP_ALIVE;
|
---|
1722 | break;
|
---|
1723 | case h_connection_close:
|
---|
1724 | parser->flags |= F_CONNECTION_CLOSE;
|
---|
1725 | break;
|
---|
1726 | case h_transfer_encoding_chunked:
|
---|
1727 | parser->flags |= F_CHUNKED;
|
---|
1728 | break;
|
---|
1729 | case h_connection_upgrade:
|
---|
1730 | parser->flags |= F_CONNECTION_UPGRADE;
|
---|
1731 | break;
|
---|
1732 | default:
|
---|
1733 | break;
|
---|
1734 | }
|
---|
1735 |
|
---|
1736 | UPDATE_STATE(s_header_field_start);
|
---|
1737 | REEXECUTE();
|
---|
1738 | }
|
---|
1739 |
|
---|
1740 | case s_header_value_discard_ws_almost_done:
|
---|
1741 | {
|
---|
1742 | STRICT_CHECK(ch != LF);
|
---|
1743 | UPDATE_STATE(s_header_value_discard_lws);
|
---|
1744 | break;
|
---|
1745 | }
|
---|
1746 |
|
---|
1747 | case s_header_value_discard_lws:
|
---|
1748 | {
|
---|
1749 | if (ch == ' ' || ch == '\t') {
|
---|
1750 | UPDATE_STATE(s_header_value_discard_ws);
|
---|
1751 | break;
|
---|
1752 | } else {
|
---|
1753 | switch (parser->header_state) {
|
---|
1754 | case h_connection_keep_alive:
|
---|
1755 | parser->flags |= F_CONNECTION_KEEP_ALIVE;
|
---|
1756 | break;
|
---|
1757 | case h_connection_close:
|
---|
1758 | parser->flags |= F_CONNECTION_CLOSE;
|
---|
1759 | break;
|
---|
1760 | case h_connection_upgrade:
|
---|
1761 | parser->flags |= F_CONNECTION_UPGRADE;
|
---|
1762 | break;
|
---|
1763 | case h_transfer_encoding_chunked:
|
---|
1764 | parser->flags |= F_CHUNKED;
|
---|
1765 | break;
|
---|
1766 | default:
|
---|
1767 | break;
|
---|
1768 | }
|
---|
1769 |
|
---|
1770 | /* header value was empty */
|
---|
1771 | MARK(header_value);
|
---|
1772 | UPDATE_STATE(s_header_field_start);
|
---|
1773 | CALLBACK_DATA_NOADVANCE(header_value);
|
---|
1774 | REEXECUTE();
|
---|
1775 | }
|
---|
1776 | }
|
---|
1777 |
|
---|
1778 | case s_headers_almost_done:
|
---|
1779 | {
|
---|
1780 | STRICT_CHECK(ch != LF);
|
---|
1781 |
|
---|
1782 | if (parser->flags & F_TRAILING) {
|
---|
1783 | /* End of a chunked request */
|
---|
1784 | UPDATE_STATE(NEW_MESSAGE());
|
---|
1785 | CALLBACK_NOTIFY(message_complete);
|
---|
1786 | break;
|
---|
1787 | }
|
---|
1788 |
|
---|
1789 | UPDATE_STATE(s_headers_done);
|
---|
1790 |
|
---|
1791 | /* Set this here so that on_headers_complete() callbacks can see it */
|
---|
1792 | parser->upgrade =
|
---|
1793 | ((parser->flags & (F_UPGRADE | F_CONNECTION_UPGRADE)) ==
|
---|
1794 | (F_UPGRADE | F_CONNECTION_UPGRADE) ||
|
---|
1795 | parser->method == HTTP_CONNECT);
|
---|
1796 |
|
---|
1797 | /* Here we call the headers_complete callback. This is somewhat
|
---|
1798 | * different than other callbacks because if the user returns 1, we
|
---|
1799 | * will interpret that as saying that this message has no body. This
|
---|
1800 | * is needed for the annoying case of recieving a response to a HEAD
|
---|
1801 | * request.
|
---|
1802 | *
|
---|
1803 | * We'd like to use CALLBACK_NOTIFY_NOADVANCE() here but we cannot, so
|
---|
1804 | * we have to simulate it by handling a change in errno below.
|
---|
1805 | */
|
---|
1806 | if (settings->on_headers_complete) {
|
---|
1807 | switch (settings->on_headers_complete(parser)) {
|
---|
1808 | case 0:
|
---|
1809 | break;
|
---|
1810 |
|
---|
1811 | case 1:
|
---|
1812 | parser->flags |= F_SKIPBODY;
|
---|
1813 | break;
|
---|
1814 |
|
---|
1815 | default:
|
---|
1816 | SET_ERRNO(HPE_CB_headers_complete);
|
---|
1817 | RETURN(p - data); /* Error */
|
---|
1818 | }
|
---|
1819 | }
|
---|
1820 |
|
---|
1821 | if (HTTP_PARSER_ERRNO(parser) != HPE_OK) {
|
---|
1822 | RETURN(p - data);
|
---|
1823 | }
|
---|
1824 |
|
---|
1825 | REEXECUTE();
|
---|
1826 | }
|
---|
1827 |
|
---|
1828 | case s_headers_done:
|
---|
1829 | {
|
---|
1830 | STRICT_CHECK(ch != LF);
|
---|
1831 |
|
---|
1832 | parser->nread = 0;
|
---|
1833 |
|
---|
1834 | /* Exit, the rest of the connect is in a different protocol. */
|
---|
1835 | if (parser->upgrade) {
|
---|
1836 | UPDATE_STATE(NEW_MESSAGE());
|
---|
1837 | CALLBACK_NOTIFY(message_complete);
|
---|
1838 | RETURN((p - data) + 1);
|
---|
1839 | }
|
---|
1840 |
|
---|
1841 | if (parser->flags & F_SKIPBODY) {
|
---|
1842 | UPDATE_STATE(NEW_MESSAGE());
|
---|
1843 | CALLBACK_NOTIFY(message_complete);
|
---|
1844 | } else if (parser->flags & F_CHUNKED) {
|
---|
1845 | /* chunked encoding - ignore Content-Length header */
|
---|
1846 | UPDATE_STATE(s_chunk_size_start);
|
---|
1847 | } else {
|
---|
1848 | if (parser->content_length == 0) {
|
---|
1849 | /* Content-Length header given but zero: Content-Length: 0\r\n */
|
---|
1850 | UPDATE_STATE(NEW_MESSAGE());
|
---|
1851 | CALLBACK_NOTIFY(message_complete);
|
---|
1852 | } else if (parser->content_length != ULLONG_MAX) {
|
---|
1853 | /* Content-Length header given and non-zero */
|
---|
1854 | UPDATE_STATE(s_body_identity);
|
---|
1855 | } else {
|
---|
1856 | if (parser->type == HTTP_REQUEST ||
|
---|
1857 | !http_message_needs_eof(parser)) {
|
---|
1858 | /* Assume content-length 0 - read the next */
|
---|
1859 | UPDATE_STATE(NEW_MESSAGE());
|
---|
1860 | CALLBACK_NOTIFY(message_complete);
|
---|
1861 | } else {
|
---|
1862 | /* Read body until EOF */
|
---|
1863 | UPDATE_STATE(s_body_identity_eof);
|
---|
1864 | }
|
---|
1865 | }
|
---|
1866 | }
|
---|
1867 |
|
---|
1868 | break;
|
---|
1869 | }
|
---|
1870 |
|
---|
1871 | case s_body_identity:
|
---|
1872 | {
|
---|
1873 | uint64_t to_read = MIN(parser->content_length,
|
---|
1874 | (uint64_t) ((data + len) - p));
|
---|
1875 |
|
---|
1876 | assert(parser->content_length != 0
|
---|
1877 | && parser->content_length != ULLONG_MAX);
|
---|
1878 |
|
---|
1879 | /* The difference between advancing content_length and p is because
|
---|
1880 | * the latter will automaticaly advance on the next loop iteration.
|
---|
1881 | * Further, if content_length ends up at 0, we want to see the last
|
---|
1882 | * byte again for our message complete callback.
|
---|
1883 | */
|
---|
1884 | MARK(body);
|
---|
1885 | parser->content_length -= to_read;
|
---|
1886 | p += to_read - 1;
|
---|
1887 |
|
---|
1888 | if (parser->content_length == 0) {
|
---|
1889 | UPDATE_STATE(s_message_done);
|
---|
1890 |
|
---|
1891 | /* Mimic CALLBACK_DATA_NOADVANCE() but with one extra byte.
|
---|
1892 | *
|
---|
1893 | * The alternative to doing this is to wait for the next byte to
|
---|
1894 | * trigger the data callback, just as in every other case. The
|
---|
1895 | * problem with this is that this makes it difficult for the test
|
---|
1896 | * harness to distinguish between complete-on-EOF and
|
---|
1897 | * complete-on-length. It's not clear that this distinction is
|
---|
1898 | * important for applications, but let's keep it for now.
|
---|
1899 | */
|
---|
1900 | CALLBACK_DATA_(body, p - body_mark + 1, p - data);
|
---|
1901 | REEXECUTE();
|
---|
1902 | }
|
---|
1903 |
|
---|
1904 | break;
|
---|
1905 | }
|
---|
1906 |
|
---|
1907 | /* read until EOF */
|
---|
1908 | case s_body_identity_eof:
|
---|
1909 | MARK(body);
|
---|
1910 | p = data + len - 1;
|
---|
1911 |
|
---|
1912 | break;
|
---|
1913 |
|
---|
1914 | case s_message_done:
|
---|
1915 | UPDATE_STATE(NEW_MESSAGE());
|
---|
1916 | CALLBACK_NOTIFY(message_complete);
|
---|
1917 | break;
|
---|
1918 |
|
---|
1919 | case s_chunk_size_start:
|
---|
1920 | {
|
---|
1921 | assert(parser->nread == 1);
|
---|
1922 | assert(parser->flags & F_CHUNKED);
|
---|
1923 |
|
---|
1924 | unhex_val = unhex[(unsigned char)ch];
|
---|
1925 | if (UNLIKELY(unhex_val == -1)) {
|
---|
1926 | SET_ERRNO(HPE_INVALID_CHUNK_SIZE);
|
---|
1927 | goto error;
|
---|
1928 | }
|
---|
1929 |
|
---|
1930 | parser->content_length = unhex_val;
|
---|
1931 | UPDATE_STATE(s_chunk_size);
|
---|
1932 | break;
|
---|
1933 | }
|
---|
1934 |
|
---|
1935 | case s_chunk_size:
|
---|
1936 | {
|
---|
1937 | uint64_t t;
|
---|
1938 |
|
---|
1939 | assert(parser->flags & F_CHUNKED);
|
---|
1940 |
|
---|
1941 | if (ch == CR) {
|
---|
1942 | UPDATE_STATE(s_chunk_size_almost_done);
|
---|
1943 | break;
|
---|
1944 | }
|
---|
1945 |
|
---|
1946 | unhex_val = unhex[(unsigned char)ch];
|
---|
1947 |
|
---|
1948 | if (unhex_val == -1) {
|
---|
1949 | if (ch == ';' || ch == ' ') {
|
---|
1950 | UPDATE_STATE(s_chunk_parameters);
|
---|
1951 | break;
|
---|
1952 | }
|
---|
1953 |
|
---|
1954 | SET_ERRNO(HPE_INVALID_CHUNK_SIZE);
|
---|
1955 | goto error;
|
---|
1956 | }
|
---|
1957 |
|
---|
1958 | t = parser->content_length;
|
---|
1959 | t *= 16;
|
---|
1960 | t += unhex_val;
|
---|
1961 |
|
---|
1962 | /* Overflow? Test against a conservative limit for simplicity. */
|
---|
1963 | if (UNLIKELY((ULLONG_MAX - 16) / 16 < parser->content_length)) {
|
---|
1964 | SET_ERRNO(HPE_INVALID_CONTENT_LENGTH);
|
---|
1965 | goto error;
|
---|
1966 | }
|
---|
1967 |
|
---|
1968 | parser->content_length = t;
|
---|
1969 | break;
|
---|
1970 | }
|
---|
1971 |
|
---|
1972 | case s_chunk_parameters:
|
---|
1973 | {
|
---|
1974 | assert(parser->flags & F_CHUNKED);
|
---|
1975 | /* just ignore this shit. TODO check for overflow */
|
---|
1976 | if (ch == CR) {
|
---|
1977 | UPDATE_STATE(s_chunk_size_almost_done);
|
---|
1978 | break;
|
---|
1979 | }
|
---|
1980 | break;
|
---|
1981 | }
|
---|
1982 |
|
---|
1983 | case s_chunk_size_almost_done:
|
---|
1984 | {
|
---|
1985 | assert(parser->flags & F_CHUNKED);
|
---|
1986 | STRICT_CHECK(ch != LF);
|
---|
1987 |
|
---|
1988 | parser->nread = 0;
|
---|
1989 |
|
---|
1990 | if (parser->content_length == 0) {
|
---|
1991 | parser->flags |= F_TRAILING;
|
---|
1992 | UPDATE_STATE(s_header_field_start);
|
---|
1993 | } else {
|
---|
1994 | UPDATE_STATE(s_chunk_data);
|
---|
1995 | }
|
---|
1996 | break;
|
---|
1997 | }
|
---|
1998 |
|
---|
1999 | case s_chunk_data:
|
---|
2000 | {
|
---|
2001 | uint64_t to_read = MIN(parser->content_length,
|
---|
2002 | (uint64_t) ((data + len) - p));
|
---|
2003 |
|
---|
2004 | assert(parser->flags & F_CHUNKED);
|
---|
2005 | assert(parser->content_length != 0
|
---|
2006 | && parser->content_length != ULLONG_MAX);
|
---|
2007 |
|
---|
2008 | /* See the explanation in s_body_identity for why the content
|
---|
2009 | * length and data pointers are managed this way.
|
---|
2010 | */
|
---|
2011 | MARK(body);
|
---|
2012 | parser->content_length -= to_read;
|
---|
2013 | p += to_read - 1;
|
---|
2014 |
|
---|
2015 | if (parser->content_length == 0) {
|
---|
2016 | UPDATE_STATE(s_chunk_data_almost_done);
|
---|
2017 | }
|
---|
2018 |
|
---|
2019 | break;
|
---|
2020 | }
|
---|
2021 |
|
---|
2022 | case s_chunk_data_almost_done:
|
---|
2023 | assert(parser->flags & F_CHUNKED);
|
---|
2024 | assert(parser->content_length == 0);
|
---|
2025 | STRICT_CHECK(ch != CR);
|
---|
2026 | UPDATE_STATE(s_chunk_data_done);
|
---|
2027 | CALLBACK_DATA(body);
|
---|
2028 | break;
|
---|
2029 |
|
---|
2030 | case s_chunk_data_done:
|
---|
2031 | assert(parser->flags & F_CHUNKED);
|
---|
2032 | STRICT_CHECK(ch != LF);
|
---|
2033 | parser->nread = 0;
|
---|
2034 | UPDATE_STATE(s_chunk_size_start);
|
---|
2035 | break;
|
---|
2036 |
|
---|
2037 | default:
|
---|
2038 | assert(0 && "unhandled state");
|
---|
2039 | SET_ERRNO(HPE_INVALID_INTERNAL_STATE);
|
---|
2040 | goto error;
|
---|
2041 | }
|
---|
2042 | }
|
---|
2043 |
|
---|
2044 | /* Run callbacks for any marks that we have leftover after we ran our of
|
---|
2045 | * bytes. There should be at most one of these set, so it's OK to invoke
|
---|
2046 | * them in series (unset marks will not result in callbacks).
|
---|
2047 | *
|
---|
2048 | * We use the NOADVANCE() variety of callbacks here because 'p' has already
|
---|
2049 | * overflowed 'data' and this allows us to correct for the off-by-one that
|
---|
2050 | * we'd otherwise have (since CALLBACK_DATA() is meant to be run with a 'p'
|
---|
2051 | * value that's in-bounds).
|
---|
2052 | */
|
---|
2053 |
|
---|
2054 | assert(((header_field_mark ? 1 : 0) +
|
---|
2055 | (header_value_mark ? 1 : 0) +
|
---|
2056 | (url_mark ? 1 : 0) +
|
---|
2057 | (body_mark ? 1 : 0) +
|
---|
2058 | (status_mark ? 1 : 0)) <= 1);
|
---|
2059 |
|
---|
2060 | CALLBACK_DATA_NOADVANCE(header_field);
|
---|
2061 | CALLBACK_DATA_NOADVANCE(header_value);
|
---|
2062 | CALLBACK_DATA_NOADVANCE(url);
|
---|
2063 | CALLBACK_DATA_NOADVANCE(body);
|
---|
2064 | CALLBACK_DATA_NOADVANCE(status);
|
---|
2065 |
|
---|
2066 | RETURN(len);
|
---|
2067 |
|
---|
2068 | error:
|
---|
2069 | if (HTTP_PARSER_ERRNO(parser) == HPE_OK) {
|
---|
2070 | SET_ERRNO(HPE_UNKNOWN);
|
---|
2071 | }
|
---|
2072 |
|
---|
2073 | RETURN(p - data);
|
---|
2074 | }
|
---|
2075 |
|
---|
2076 |
|
---|
2077 | /* Does the parser need to see an EOF to find the end of the message? */
|
---|
2078 | int
|
---|
2079 | http_message_needs_eof (const http_parser *parser)
|
---|
2080 | {
|
---|
2081 | if (parser->type == HTTP_REQUEST) {
|
---|
2082 | return 0;
|
---|
2083 | }
|
---|
2084 |
|
---|
2085 | /* See RFC 2616 section 4.4 */
|
---|
2086 | if (parser->status_code / 100 == 1 || /* 1xx e.g. Continue */
|
---|
2087 | parser->status_code == 204 || /* No Content */
|
---|
2088 | parser->status_code == 304 || /* Not Modified */
|
---|
2089 | parser->flags & F_SKIPBODY) { /* response to a HEAD request */
|
---|
2090 | return 0;
|
---|
2091 | }
|
---|
2092 |
|
---|
2093 | if ((parser->flags & F_CHUNKED) || parser->content_length != ULLONG_MAX) {
|
---|
2094 | return 0;
|
---|
2095 | }
|
---|
2096 |
|
---|
2097 | return 1;
|
---|
2098 | }
|
---|
2099 |
|
---|
2100 |
|
---|
2101 | int
|
---|
2102 | http_should_keep_alive (const http_parser *parser)
|
---|
2103 | {
|
---|
2104 | if (parser->http_major > 0 && parser->http_minor > 0) {
|
---|
2105 | /* HTTP/1.1 */
|
---|
2106 | if (parser->flags & F_CONNECTION_CLOSE) {
|
---|
2107 | return 0;
|
---|
2108 | }
|
---|
2109 | } else {
|
---|
2110 | /* HTTP/1.0 or earlier */
|
---|
2111 | if (!(parser->flags & F_CONNECTION_KEEP_ALIVE)) {
|
---|
2112 | return 0;
|
---|
2113 | }
|
---|
2114 | }
|
---|
2115 |
|
---|
2116 | return !http_message_needs_eof(parser);
|
---|
2117 | }
|
---|
2118 |
|
---|
2119 |
|
---|
2120 | const char *
|
---|
2121 | http_method_str (enum http_method m)
|
---|
2122 | {
|
---|
2123 | return ELEM_AT(method_strings, m, "<unknown>");
|
---|
2124 | }
|
---|
2125 |
|
---|
2126 |
|
---|
2127 | void
|
---|
2128 | http_parser_init (http_parser *parser, enum http_parser_type t)
|
---|
2129 | {
|
---|
2130 | void *data = parser->data; /* preserve application data */
|
---|
2131 | memset(parser, 0, sizeof(*parser));
|
---|
2132 | parser->data = data;
|
---|
2133 | parser->type = t;
|
---|
2134 | parser->state = (t == HTTP_REQUEST ? s_start_req : (t == HTTP_RESPONSE ? s_start_res : s_start_req_or_res));
|
---|
2135 | parser->http_errno = HPE_OK;
|
---|
2136 | }
|
---|
2137 |
|
---|
2138 | const char *
|
---|
2139 | http_errno_name(enum http_errno err) {
|
---|
2140 | assert(err < (sizeof(http_strerror_tab)/sizeof(http_strerror_tab[0])));
|
---|
2141 | return http_strerror_tab[err].name;
|
---|
2142 | }
|
---|
2143 |
|
---|
2144 | const char *
|
---|
2145 | http_errno_description(enum http_errno err) {
|
---|
2146 | assert(err < (sizeof(http_strerror_tab)/sizeof(http_strerror_tab[0])));
|
---|
2147 | return http_strerror_tab[err].description;
|
---|
2148 | }
|
---|
2149 |
|
---|
2150 | static enum http_host_state
|
---|
2151 | http_parse_host_char(enum http_host_state s, const char ch) {
|
---|
2152 | switch(s) {
|
---|
2153 | case s_http_userinfo:
|
---|
2154 | case s_http_userinfo_start:
|
---|
2155 | if (ch == '@') {
|
---|
2156 | return s_http_host_start;
|
---|
2157 | }
|
---|
2158 |
|
---|
2159 | if (IS_USERINFO_CHAR(ch)) {
|
---|
2160 | return s_http_userinfo;
|
---|
2161 | }
|
---|
2162 | break;
|
---|
2163 |
|
---|
2164 | case s_http_host_start:
|
---|
2165 | if (ch == '[') {
|
---|
2166 | return s_http_host_v6_start;
|
---|
2167 | }
|
---|
2168 |
|
---|
2169 | if (IS_HOST_CHAR(ch)) {
|
---|
2170 | return s_http_host;
|
---|
2171 | }
|
---|
2172 |
|
---|
2173 | break;
|
---|
2174 |
|
---|
2175 | case s_http_host:
|
---|
2176 | if (IS_HOST_CHAR(ch)) {
|
---|
2177 | return s_http_host;
|
---|
2178 | }
|
---|
2179 |
|
---|
2180 | /* FALLTHROUGH */
|
---|
2181 | case s_http_host_v6_end:
|
---|
2182 | if (ch == ':') {
|
---|
2183 | return s_http_host_port_start;
|
---|
2184 | }
|
---|
2185 |
|
---|
2186 | break;
|
---|
2187 |
|
---|
2188 | case s_http_host_v6:
|
---|
2189 | if (ch == ']') {
|
---|
2190 | return s_http_host_v6_end;
|
---|
2191 | }
|
---|
2192 |
|
---|
2193 | /* FALLTHROUGH */
|
---|
2194 | case s_http_host_v6_start:
|
---|
2195 | if (IS_HEX(ch) || ch == ':' || ch == '.') {
|
---|
2196 | return s_http_host_v6;
|
---|
2197 | }
|
---|
2198 |
|
---|
2199 | break;
|
---|
2200 |
|
---|
2201 | case s_http_host_port:
|
---|
2202 | case s_http_host_port_start:
|
---|
2203 | if (IS_NUM(ch)) {
|
---|
2204 | return s_http_host_port;
|
---|
2205 | }
|
---|
2206 |
|
---|
2207 | break;
|
---|
2208 |
|
---|
2209 | default:
|
---|
2210 | break;
|
---|
2211 | }
|
---|
2212 | return s_http_host_dead;
|
---|
2213 | }
|
---|
2214 |
|
---|
2215 | static int
|
---|
2216 | http_parse_host(const char * buf, struct http_parser_url *u, int found_at) {
|
---|
2217 | enum http_host_state s;
|
---|
2218 |
|
---|
2219 | const char *p;
|
---|
2220 | size_t buflen = u->field_data[UF_HOST].off + u->field_data[UF_HOST].len;
|
---|
2221 |
|
---|
2222 | u->field_data[UF_HOST].len = 0;
|
---|
2223 |
|
---|
2224 | s = found_at ? s_http_userinfo_start : s_http_host_start;
|
---|
2225 |
|
---|
2226 | for (p = buf + u->field_data[UF_HOST].off; p < buf + buflen; p++) {
|
---|
2227 | enum http_host_state new_s = http_parse_host_char(s, *p);
|
---|
2228 |
|
---|
2229 | if (new_s == s_http_host_dead) {
|
---|
2230 | return 1;
|
---|
2231 | }
|
---|
2232 |
|
---|
2233 | switch(new_s) {
|
---|
2234 | case s_http_host:
|
---|
2235 | if (s != s_http_host) {
|
---|
2236 | u->field_data[UF_HOST].off = p - buf;
|
---|
2237 | }
|
---|
2238 | u->field_data[UF_HOST].len++;
|
---|
2239 | break;
|
---|
2240 |
|
---|
2241 | case s_http_host_v6:
|
---|
2242 | if (s != s_http_host_v6) {
|
---|
2243 | u->field_data[UF_HOST].off = p - buf;
|
---|
2244 | }
|
---|
2245 | u->field_data[UF_HOST].len++;
|
---|
2246 | break;
|
---|
2247 |
|
---|
2248 | case s_http_host_port:
|
---|
2249 | if (s != s_http_host_port) {
|
---|
2250 | u->field_data[UF_PORT].off = p - buf;
|
---|
2251 | u->field_data[UF_PORT].len = 0;
|
---|
2252 | u->field_set |= (1 << UF_PORT);
|
---|
2253 | }
|
---|
2254 | u->field_data[UF_PORT].len++;
|
---|
2255 | break;
|
---|
2256 |
|
---|
2257 | case s_http_userinfo:
|
---|
2258 | if (s != s_http_userinfo) {
|
---|
2259 | u->field_data[UF_USERINFO].off = p - buf ;
|
---|
2260 | u->field_data[UF_USERINFO].len = 0;
|
---|
2261 | u->field_set |= (1 << UF_USERINFO);
|
---|
2262 | }
|
---|
2263 | u->field_data[UF_USERINFO].len++;
|
---|
2264 | break;
|
---|
2265 |
|
---|
2266 | default:
|
---|
2267 | break;
|
---|
2268 | }
|
---|
2269 | s = new_s;
|
---|
2270 | }
|
---|
2271 |
|
---|
2272 | /* Make sure we don't end somewhere unexpected */
|
---|
2273 | switch (s) {
|
---|
2274 | case s_http_host_start:
|
---|
2275 | case s_http_host_v6_start:
|
---|
2276 | case s_http_host_v6:
|
---|
2277 | case s_http_host_port_start:
|
---|
2278 | case s_http_userinfo:
|
---|
2279 | case s_http_userinfo_start:
|
---|
2280 | return 1;
|
---|
2281 | default:
|
---|
2282 | break;
|
---|
2283 | }
|
---|
2284 |
|
---|
2285 | return 0;
|
---|
2286 | }
|
---|
2287 |
|
---|
2288 | int
|
---|
2289 | http_parser_parse_url(const char *buf, size_t buflen, int is_connect,
|
---|
2290 | struct http_parser_url *u)
|
---|
2291 | {
|
---|
2292 | enum state s;
|
---|
2293 | const char *p;
|
---|
2294 | enum http_parser_url_fields uf, old_uf;
|
---|
2295 | int found_at = 0;
|
---|
2296 |
|
---|
2297 | u->port = u->field_set = 0;
|
---|
2298 | s = is_connect ? s_req_server_start : s_req_spaces_before_url;
|
---|
2299 | old_uf = UF_MAX;
|
---|
2300 |
|
---|
2301 | for (p = buf; p < buf + buflen; p++) {
|
---|
2302 | s = parse_url_char(s, *p);
|
---|
2303 |
|
---|
2304 | /* Figure out the next field that we're operating on */
|
---|
2305 | switch (s) {
|
---|
2306 | case s_dead:
|
---|
2307 | return 1;
|
---|
2308 |
|
---|
2309 | /* Skip delimeters */
|
---|
2310 | case s_req_schema_slash:
|
---|
2311 | case s_req_schema_slash_slash:
|
---|
2312 | case s_req_server_start:
|
---|
2313 | case s_req_query_string_start:
|
---|
2314 | case s_req_fragment_start:
|
---|
2315 | continue;
|
---|
2316 |
|
---|
2317 | case s_req_schema:
|
---|
2318 | uf = UF_SCHEMA;
|
---|
2319 | break;
|
---|
2320 |
|
---|
2321 | case s_req_server_with_at:
|
---|
2322 | found_at = 1;
|
---|
2323 |
|
---|
2324 | /* FALLTROUGH */
|
---|
2325 | case s_req_server:
|
---|
2326 | uf = UF_HOST;
|
---|
2327 | break;
|
---|
2328 |
|
---|
2329 | case s_req_path:
|
---|
2330 | uf = UF_PATH;
|
---|
2331 | break;
|
---|
2332 |
|
---|
2333 | case s_req_query_string:
|
---|
2334 | uf = UF_QUERY;
|
---|
2335 | break;
|
---|
2336 |
|
---|
2337 | case s_req_fragment:
|
---|
2338 | uf = UF_FRAGMENT;
|
---|
2339 | break;
|
---|
2340 |
|
---|
2341 | default:
|
---|
2342 | assert(!"Unexpected state");
|
---|
2343 | return 1;
|
---|
2344 | }
|
---|
2345 |
|
---|
2346 | /* Nothing's changed; soldier on */
|
---|
2347 | if (uf == old_uf) {
|
---|
2348 | u->field_data[uf].len++;
|
---|
2349 | continue;
|
---|
2350 | }
|
---|
2351 |
|
---|
2352 | u->field_data[uf].off = p - buf;
|
---|
2353 | u->field_data[uf].len = 1;
|
---|
2354 |
|
---|
2355 | u->field_set |= (1 << uf);
|
---|
2356 | old_uf = uf;
|
---|
2357 | }
|
---|
2358 |
|
---|
2359 | /* host must be present if there is a schema */
|
---|
2360 | /* parsing http:///toto will fail */
|
---|
2361 | if ((u->field_set & ((1 << UF_SCHEMA) | (1 << UF_HOST))) != 0) {
|
---|
2362 | if (http_parse_host(buf, u, found_at) != 0) {
|
---|
2363 | return 1;
|
---|
2364 | }
|
---|
2365 | }
|
---|
2366 |
|
---|
2367 | /* CONNECT requests can only contain "hostname:port" */
|
---|
2368 | if (is_connect && u->field_set != ((1 << UF_HOST)|(1 << UF_PORT))) {
|
---|
2369 | return 1;
|
---|
2370 | }
|
---|
2371 |
|
---|
2372 | if (u->field_set & (1 << UF_PORT)) {
|
---|
2373 | /* Don't bother with endp; we've already validated the string */
|
---|
2374 | unsigned long v = ntlibc_strtoul(buf + u->field_data[UF_PORT].off, NULL, 10);
|
---|
2375 |
|
---|
2376 | /* Ports have a max value of 2^16 */
|
---|
2377 | if (v > 0xffff) {
|
---|
2378 | return 1;
|
---|
2379 | }
|
---|
2380 |
|
---|
2381 | u->port = (uint16_t) v;
|
---|
2382 | }
|
---|
2383 |
|
---|
2384 | return 0;
|
---|
2385 | }
|
---|
2386 |
|
---|
2387 | void
|
---|
2388 | http_parser_pause(http_parser *parser, int paused) {
|
---|
2389 | /* Users should only be pausing/unpausing a parser that is not in an error
|
---|
2390 | * state. In non-debug builds, there's not much that we can do about this
|
---|
2391 | * other than ignore it.
|
---|
2392 | */
|
---|
2393 | if (HTTP_PARSER_ERRNO(parser) == HPE_OK ||
|
---|
2394 | HTTP_PARSER_ERRNO(parser) == HPE_PAUSED) {
|
---|
2395 | SET_ERRNO((paused) ? HPE_PAUSED : HPE_OK);
|
---|
2396 | } else {
|
---|
2397 | assert(0 && "Attempting to pause parser in error state");
|
---|
2398 | }
|
---|
2399 | }
|
---|
2400 |
|
---|
2401 | int
|
---|
2402 | http_body_is_final(const struct http_parser *parser) {
|
---|
2403 | return parser->state == s_message_done;
|
---|
2404 | }
|
---|
2405 |
|
---|
2406 | unsigned long
|
---|
2407 | http_parser_version(void) {
|
---|
2408 | return HTTP_PARSER_VERSION_MAJOR * 0x10000 |
|
---|
2409 | HTTP_PARSER_VERSION_MINOR * 0x00100 |
|
---|
2410 | HTTP_PARSER_VERSION_PATCH * 0x00001;
|
---|
2411 | }
|
---|