1 | #include "protocol.hfa" |
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2 | |
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3 | #define _GNU_SOURCE |
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4 | extern "C" { |
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5 | #include <fcntl.h> |
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6 | } |
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7 | |
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8 | #define xstr(s) str(s) |
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9 | #define str(s) #s |
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10 | |
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11 | #include <fstream.hfa> |
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12 | #include <iofwd.hfa> |
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13 | #include <io/types.hfa> |
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14 | #include <mutex_stmt.hfa> |
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15 | |
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16 | #include <assert.h> |
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17 | // #include <stdio.h> // Don't use stdio.h, too slow to compile |
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18 | extern "C" { |
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19 | int snprintf ( char * s, size_t n, const char * format, ... ); |
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20 | // #include <linux/io_uring.h> |
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21 | } |
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22 | #include <string.h> |
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23 | #include <errno.h> |
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24 | |
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25 | #include "options.hfa" |
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26 | |
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27 | #define PLAINTEXT_1WRITE |
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28 | #define PLAINTEXT_MEMCPY |
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29 | #define PLAINTEXT_NOCOPY |
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30 | #define LINKED_IO |
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31 | |
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32 | struct https_msg_str { |
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33 | char msg[512]; |
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34 | size_t len; |
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35 | }; |
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36 | |
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37 | const https_msg_str * volatile http_msgs[KNOWN_CODES] = { 0 }; |
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38 | |
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39 | _Static_assert( KNOWN_CODES == (sizeof(http_msgs ) / sizeof(http_msgs [0]))); |
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40 | |
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41 | const int http_codes[KNOWN_CODES] = { |
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42 | 200, |
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43 | 200, |
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44 | 400, |
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45 | 404, |
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46 | 405, |
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47 | 408, |
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48 | 413, |
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49 | 414, |
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50 | }; |
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51 | |
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52 | _Static_assert( KNOWN_CODES == (sizeof(http_codes) / sizeof(http_codes[0]))); |
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53 | |
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54 | int code_val(HttpCode code) { |
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55 | return http_codes[code]; |
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56 | } |
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57 | |
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58 | static inline int answer( int fd, const char * it, int len ) { |
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59 | while(len > 0) { |
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60 | // Call write |
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61 | int ret = cfa_send(fd, it, len, 0, CFA_IO_LAZY); |
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62 | if( ret < 0 ) { |
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63 | if( errno == ECONNRESET || errno == EPIPE ) { close(fd); return -ECONNRESET; } |
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64 | if( errno == EAGAIN || errno == EWOULDBLOCK) return -EAGAIN; |
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65 | |
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66 | abort( "'answer error' error: (%d) %s\n", (int)errno, strerror(errno) ); |
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67 | } |
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68 | |
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69 | // update it/len |
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70 | it += ret; |
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71 | len -= ret; |
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72 | } |
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73 | return 0; |
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74 | } |
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75 | |
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76 | int answer_error( int fd, HttpCode code ) { |
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77 | /* paranoid */ assert( code < KNOWN_CODES && code != OK200 ); |
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78 | int idx = (int)code; |
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79 | return answer( fd, http_msgs[idx]->msg, http_msgs[idx]->len ); |
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80 | } |
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81 | |
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82 | static int fill_header(char * it, size_t size) { |
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83 | memcpy(it, http_msgs[OK200]->msg, http_msgs[OK200]->len); |
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84 | it += http_msgs[OK200]->len; |
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85 | int len = http_msgs[OK200]->len; |
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86 | len += snprintf(it, 512 - len, "%d \n\n", size); |
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87 | return len; |
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88 | } |
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89 | |
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90 | static int answer_header( int fd, size_t size ) { |
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91 | char buffer[512]; |
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92 | int len = fill_header(buffer, size); |
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93 | return answer( fd, buffer, len ); |
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94 | } |
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95 | |
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96 | #if defined(PLAINTEXT_NOCOPY) |
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97 | int answer_plaintext( int fd ) { |
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98 | return answer(fd, http_msgs[OK200_PlainText]->msg, http_msgs[OK200_PlainText]->len); // +1 cause snprintf doesn't count nullterminator |
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99 | } |
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100 | #elif defined(PLAINTEXT_MEMCPY) |
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101 | #define TEXTSIZE 15 |
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102 | int answer_plaintext( int fd ) { |
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103 | char text[] = "Hello, World!\n\n"; |
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104 | char ts[] = xstr(TEXTSIZE) " \n\n"; |
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105 | _Static_assert(sizeof(text) - 1 == TEXTSIZE); |
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106 | char buffer[512 + TEXTSIZE]; |
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107 | char * it = buffer; |
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108 | memcpy(it, http_msgs[OK200]->msg, http_msgs[OK200]->len); |
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109 | it += http_msgs[OK200]->len; |
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110 | int len = http_msgs[OK200]->len; |
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111 | memcpy(it, ts, sizeof(ts) - 1); |
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112 | it += sizeof(ts) - 1; |
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113 | len += sizeof(ts) - 1; |
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114 | memcpy(it, text, TEXTSIZE); |
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115 | return answer(fd, buffer, len + TEXTSIZE); |
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116 | } |
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117 | #elif defined(PLAINTEXT_1WRITE) |
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118 | int answer_plaintext( int fd ) { |
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119 | char text[] = "Hello, World!\n\n"; |
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120 | char buffer[512 + sizeof(text)]; |
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121 | char * it = buffer; |
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122 | memcpy(it, http_msgs[OK200]->msg, http_msgs[OK200]->len); |
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123 | it += http_msgs[OK200]->len; |
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124 | int len = http_msgs[OK200]->len; |
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125 | int r = snprintf(it, 512 - len, "%d \n\n", sizeof(text)); |
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126 | it += r; |
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127 | len += r; |
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128 | memcpy(it, text, sizeof(text)); |
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129 | return answer(fd, buffer, len + sizeof(text)); |
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130 | } |
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131 | #else |
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132 | int answer_plaintext( int fd ) { |
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133 | char text[] = "Hello, World!\n\n"; |
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134 | int ret = answer_header(fd, sizeof(text)); |
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135 | if( ret < 0 ) return ret; |
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136 | return answer(fd, text, sizeof(text)); |
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137 | } |
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138 | #endif |
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139 | |
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140 | int answer_empty( int fd ) { |
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141 | return answer_header(fd, 0); |
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142 | } |
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143 | |
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144 | static int sendfile( int pipe[2], int fd, int ans_fd, size_t count ) { |
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145 | unsigned sflags = SPLICE_F_MOVE; // | SPLICE_F_MORE; |
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146 | off_t offset = 0; |
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147 | ssize_t ret; |
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148 | SPLICE1: while(count > 0) { |
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149 | ret = cfa_splice(ans_fd, &offset, pipe[1], 0p, count, sflags, CFA_IO_LAZY); |
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150 | if( ret < 0 ) { |
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151 | if( errno != EAGAIN && errno != EWOULDBLOCK) continue SPLICE1; |
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152 | if( errno == ECONNRESET ) return -ECONNRESET; |
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153 | if( errno == EPIPE ) return -EPIPE; |
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154 | abort( "splice [0] error: (%d) %s\n", (int)errno, strerror(errno) ); |
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155 | } |
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156 | |
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157 | count -= ret; |
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158 | offset += ret; |
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159 | size_t in_pipe = ret; |
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160 | SPLICE2: while(in_pipe > 0) { |
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161 | ret = cfa_splice(pipe[0], 0p, fd, 0p, in_pipe, sflags, CFA_IO_LAZY); |
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162 | if( ret < 0 ) { |
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163 | if( errno != EAGAIN && errno != EWOULDBLOCK) continue SPLICE2; |
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164 | if( errno == ECONNRESET ) return -ECONNRESET; |
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165 | if( errno == EPIPE ) return -EPIPE; |
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166 | abort( "splice [1] error: (%d) %s\n", (int)errno, strerror(errno) ); |
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167 | } |
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168 | in_pipe -= ret; |
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169 | } |
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170 | |
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171 | } |
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172 | return count; |
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173 | } |
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174 | |
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175 | enum FSM_STATE { |
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176 | Initial, |
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177 | Retry, |
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178 | Error, |
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179 | Done, |
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180 | }; |
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181 | |
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182 | struct FSM_Result { |
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183 | FSM_STATE state; |
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184 | int error; |
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185 | }; |
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186 | |
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187 | static inline void ?{}(FSM_Result & this) { this.state = Initial; this.error = 0; } |
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188 | static inline bool is_error(FSM_Result & this) { return Error == this.state; } |
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189 | static inline bool is_done(FSM_Result & this) { return Done == this.state; } |
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190 | |
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191 | static inline int error(FSM_Result & this, int error) { |
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192 | this.error = error; |
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193 | this.state = Error; |
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194 | return error; |
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195 | } |
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196 | |
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197 | static inline int done(FSM_Result & this) { |
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198 | this.state = Done; |
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199 | return 0; |
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200 | } |
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201 | |
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202 | static inline int retry(FSM_Result & this) { |
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203 | this.state = Retry; |
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204 | return 0; |
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205 | } |
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206 | |
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207 | static inline int need(FSM_Result & this) { |
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208 | switch(this.state) { |
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209 | case Initial: |
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210 | case Retry: |
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211 | return 1; |
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212 | case Error: |
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213 | if(this.error == 0) mutex(serr) serr | "State marked error but code is 0"; |
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214 | case Done: |
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215 | return 0; |
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216 | } |
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217 | } |
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218 | |
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219 | // Generator that handles sending the header |
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220 | generator header_g { |
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221 | io_future_t f; |
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222 | const char * next; |
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223 | int fd; size_t len; |
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224 | FSM_Result res; |
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225 | }; |
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226 | |
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227 | static inline void ?{}(header_g & this, int fd, const char * it, size_t len ) { |
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228 | this.next = it; |
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229 | this.fd = fd; |
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230 | this.len = len; |
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231 | } |
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232 | |
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233 | static inline void fill(header_g & this, struct io_uring_sqe * sqe) { |
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234 | zero_sqe(sqe); |
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235 | sqe->opcode = IORING_OP_SEND; |
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236 | sqe->user_data = (uintptr_t)&this.f; |
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237 | sqe->flags = IOSQE_IO_LINK; |
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238 | sqe->fd = this.fd; |
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239 | sqe->addr = (uintptr_t)this.next; |
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240 | sqe->len = this.len; |
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241 | } |
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242 | |
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243 | static inline int error(header_g & this, int error) { |
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244 | int ret = close(this.fd); |
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245 | if( ret != 0 ) { |
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246 | mutex(serr) serr | "Failed to close fd" | errno; |
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247 | } |
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248 | return error(this.res, error); |
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249 | } |
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250 | |
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251 | static inline int wait_and_process(header_g & this) { |
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252 | wait(this.f); |
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253 | |
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254 | // Did something crazy happen? |
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255 | if(this.f.result > this.len) { |
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256 | mutex(serr) serr | "HEADER sent too much!"; |
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257 | return error(this, -ERANGE); |
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258 | } |
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259 | |
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260 | // Something failed? |
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261 | if(this.f.result < 0) { |
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262 | int error = -this.f.result; |
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263 | if( error == ECONNRESET ) return error(this, -ECONNRESET); |
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264 | if( error == EPIPE ) return error(this, -EPIPE); |
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265 | if( error == ECANCELED ) { |
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266 | mutex(serr) serr | "HEADER was cancelled, WTF!"; |
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267 | return error(this, -ECONNRESET); |
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268 | } |
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269 | if( error == EAGAIN || error == EWOULDBLOCK) { |
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270 | mutex(serr) serr | "HEADER got eagain, WTF!"; |
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271 | return error(this, -ECONNRESET); |
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272 | } |
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273 | } |
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274 | |
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275 | // Done? |
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276 | if(this.f.result == this.len) { |
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277 | return done(this.res); |
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278 | } |
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279 | |
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280 | // It must be a Short read |
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281 | this.len -= this.f.result; |
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282 | this.next += this.f.result; |
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283 | reset(this.f); |
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284 | return retry(this.res); |
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285 | } |
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286 | |
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287 | // Generator that handles splicing in a file |
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288 | struct splice_in_t { |
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289 | io_future_t f; |
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290 | int fd; int pipe; size_t len; off_t off; |
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291 | FSM_Result res; |
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292 | }; |
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293 | |
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294 | static inline void ?{}(splice_in_t & this, int fd, int pipe, size_t len) { |
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295 | this.fd = fd; |
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296 | this.pipe = pipe; |
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297 | this.len = len; |
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298 | this.off = 0; |
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299 | } |
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300 | |
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301 | static inline void fill(splice_in_t & this, struct io_uring_sqe * sqe) { |
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302 | zero_sqe(sqe); |
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303 | sqe->opcode = IORING_OP_SPLICE; |
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304 | sqe->user_data = (uintptr_t)&this.f; |
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305 | sqe->flags = 0; |
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306 | sqe->splice_fd_in = this.fd; |
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307 | sqe->splice_off_in = this.off; |
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308 | sqe->fd = this.pipe; |
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309 | sqe->off = (__u64)-1; |
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310 | sqe->len = this.len; |
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311 | sqe->splice_flags = SPLICE_F_MOVE; |
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312 | } |
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313 | |
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314 | static inline int wait_and_process(splice_in_t & this) { |
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315 | wait(this.f); |
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316 | |
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317 | // Something failed? |
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318 | if(this.f.result < 0) { |
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319 | int error = -this.f.result; |
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320 | if( error == ECONNRESET ) return error(this.res, -ECONNRESET); |
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321 | if( error == EPIPE ) return error(this.res, -EPIPE); |
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322 | if( error == ECANCELED ) { |
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323 | mutex(serr) serr | "SPLICE IN was cancelled, WTF!"; |
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324 | return error(this.res, -ECONNRESET); |
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325 | } |
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326 | if( error == EAGAIN || error == EWOULDBLOCK) { |
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327 | mutex(serr) serr | "SPLICE IN got eagain, WTF!"; |
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328 | return error(this.res, -ECONNRESET); |
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329 | } |
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330 | } |
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331 | |
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332 | // Did something crazy happen? |
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333 | if(this.f.result > this.len) { |
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334 | mutex(serr) serr | "SPLICE IN spliced too much!"; |
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335 | return error(this.res, -ERANGE); |
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336 | } |
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337 | |
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338 | // Done? |
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339 | if(this.f.result == this.len) { |
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340 | return done(this.res); |
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341 | } |
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342 | |
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343 | // It must be a Short read |
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344 | this.len -= this.f.result; |
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345 | this.off += this.f.result; |
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346 | reset(this.f); |
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347 | return retry(this.res); |
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348 | } |
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349 | |
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350 | generator splice_out_g { |
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351 | io_future_t f; |
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352 | int pipe; int fd; size_t len; |
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353 | FSM_Result res; |
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354 | }; |
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355 | |
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356 | static inline void ?{}(splice_out_g & this, int pipe, int fd, size_t len) { |
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357 | this.pipe = pipe; |
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358 | this.fd = fd; |
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359 | this.len = len; |
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360 | } |
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361 | |
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362 | static inline void fill(splice_out_g & this, struct io_uring_sqe * sqe) { |
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363 | zero_sqe(sqe); |
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364 | sqe->opcode = IORING_OP_SPLICE; |
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365 | sqe->user_data = (uintptr_t)&this.f; |
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366 | sqe->flags = 0; |
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367 | sqe->splice_fd_in = this.pipe; |
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368 | sqe->splice_off_in = (__u64)-1; |
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369 | sqe->fd = this.fd; |
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370 | sqe->off = (__u64)-1; |
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371 | sqe->len = this.len; |
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372 | sqe->splice_flags = SPLICE_F_MOVE; |
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373 | } |
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374 | |
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375 | static inline int error(splice_out_g & this, int error) { |
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376 | int ret = close(this.fd); |
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377 | if( ret != 0 ) { |
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378 | mutex(serr) serr | "Failed to close fd" | errno; |
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379 | } |
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380 | return error(this.res, error); |
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381 | } |
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382 | |
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383 | static inline void wait_and_process(splice_out_g & this) { |
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384 | wait(this.f); |
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385 | |
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386 | // Something failed? |
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387 | if(this.f.result < 0) { |
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388 | int error = -this.f.result; |
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389 | if( error == ECONNRESET ) return error(this, -ECONNRESET); |
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390 | if( error == EPIPE ) return error(this, -EPIPE); |
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391 | if( error == ECANCELED ) { |
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392 | this.f.result = 0; |
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393 | goto SHORT_WRITE; |
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394 | } |
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395 | if( error == EAGAIN || error == EWOULDBLOCK) { |
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396 | mutex(serr) serr | "SPLICE OUT got eagain, WTF!"; |
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397 | return error(this, -ECONNRESET); |
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398 | } |
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399 | } |
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400 | |
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401 | // Did something crazy happen? |
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402 | if(this.f.result > this.len) { |
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403 | mutex(serr) serr | "SPLICE OUT spliced too much!" | this.f.result | ">" | this.len; |
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404 | return error(this.res, -ERANGE); |
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405 | } |
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406 | |
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407 | // Done? |
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408 | if(this.f.result == this.len) { |
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409 | return done(this.res); |
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410 | } |
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411 | |
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412 | SHORT_WRITE: |
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413 | // It must be a Short Write |
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414 | this.len -= this.f.result; |
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415 | reset(this.f); |
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416 | return retry(this.res); |
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417 | } |
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418 | |
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419 | int answer_sendfile( int pipe[2], int fd, int ans_fd, size_t fsize ) { |
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420 | #if defined(LINKED_IO) |
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421 | char buffer[512]; |
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422 | int len = fill_header(buffer, fsize); |
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423 | header_g header = { fd, buffer, len }; |
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424 | splice_in_t splice_in = { ans_fd, pipe[1], fsize }; |
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425 | splice_out_g splice_out = { pipe[0], fd, fsize }; |
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426 | |
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427 | RETRY_LOOP: for() { |
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428 | int have = need(header.res) + need(splice_in.res) + 1; |
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429 | int idx = 0; |
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430 | struct io_uring_sqe * sqes[3]; |
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431 | __u32 idxs[3]; |
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432 | struct $io_context * ctx = cfa_io_allocate(sqes, idxs, have); |
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433 | |
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434 | if(need(splice_in.res)) { fill(splice_in, sqes[idx++]); } |
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435 | if(need( header.res)) { fill(header , sqes[idx++]); } |
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436 | fill(splice_out, sqes[idx]); |
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437 | |
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438 | // Submit everything |
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439 | asm volatile("": : :"memory"); |
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440 | cfa_io_submit( ctx, idxs, have, false ); |
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441 | |
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442 | // wait for the results |
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443 | // Always wait for splice-in to complete as |
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444 | // we may need to kill the connection if it fails |
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445 | // If it already completed, this is a no-op |
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446 | wait_and_process(splice_in); |
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447 | |
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448 | if(is_error(splice_in.res)) { |
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449 | mutex(serr) serr | "SPLICE IN failed with" | splice_in.res.error; |
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450 | close(fd); |
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451 | } |
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452 | |
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453 | // Process the other 2 |
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454 | wait_and_process(header); |
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455 | wait_and_process(splice_out); |
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456 | |
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457 | if(is_done(splice_out.res)) { |
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458 | break RETRY_LOOP; |
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459 | } |
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460 | |
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461 | // We need to wait for the completion if |
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462 | // - both completed |
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463 | // - the header failed |
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464 | // - |
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465 | |
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466 | if( is_error(header.res) |
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467 | || is_error(splice_in.res) |
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468 | || is_error(splice_out.res)) { |
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469 | return -ECONNRESET; |
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470 | } |
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471 | } |
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472 | |
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473 | return len + fsize; |
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474 | #else |
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475 | int ret = answer_header(fd, fsize); |
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476 | if( ret < 0 ) { close(fd); return ret; } |
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477 | return sendfile(pipe, fd, ans_fd, fsize); |
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478 | #endif |
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479 | } |
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480 | |
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481 | [HttpCode code, bool closed, * const char file, size_t len] http_read(int fd, []char buffer, size_t len) { |
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482 | char * it = buffer; |
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483 | size_t count = len - 1; |
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484 | int rlen = 0; |
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485 | READ: |
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486 | for() { |
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487 | int ret = cfa_recv(fd, (void*)it, count, 0, CFA_IO_LAZY); |
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488 | // int ret = read(fd, (void*)it, count); |
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489 | if(ret == 0 ) return [OK200, true, 0, 0]; |
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490 | if(ret < 0 ) { |
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491 | if( errno == EAGAIN || errno == EWOULDBLOCK) continue READ; |
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492 | if( errno == ECONNRESET ) { close(fd); return [E408, true, 0, 0]; } |
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493 | if( errno == EPIPE ) { close(fd); return [E408, true, 0, 0]; } |
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494 | abort( "read error: (%d) %s\n", (int)errno, strerror(errno) ); |
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495 | } |
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496 | it[ret + 1] = '\0'; |
---|
497 | rlen += ret; |
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498 | |
---|
499 | if( strstr( it, "\r\n\r\n" ) ) break; |
---|
500 | |
---|
501 | it += ret; |
---|
502 | count -= ret; |
---|
503 | |
---|
504 | if( count < 1 ) return [E414, false, 0, 0]; |
---|
505 | } |
---|
506 | |
---|
507 | if( options.log ) { |
---|
508 | write(sout, buffer, rlen); |
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509 | sout | nl; |
---|
510 | } |
---|
511 | |
---|
512 | it = buffer; |
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513 | int ret = memcmp(it, "GET /", 5); |
---|
514 | if( ret != 0 ) return [E400, false, 0, 0]; |
---|
515 | it += 5; |
---|
516 | |
---|
517 | char * end = strstr( it, " " ); |
---|
518 | return [OK200, false, it, end - it]; |
---|
519 | } |
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520 | |
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521 | //============================================================================================= |
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522 | |
---|
523 | #include <clock.hfa> |
---|
524 | #include <time.hfa> |
---|
525 | #include <thread.hfa> |
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526 | |
---|
527 | const char * original_http_msgs[] = { |
---|
528 | "HTTP/1.1 200 OK\nServer: HttpForall\nDate: %s \nContent-Type: text/plain\nContent-Length: ", |
---|
529 | "HTTP/1.1 200 OK\r\nServer: HttpForall\r\nConnection: keep-alive\r\nContent-Length: 15\r\nContent-Type: text/html\r\nDate: %s \r\n\r\nHello, World!\r\n", |
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530 | "HTTP/1.1 400 Bad Request\nServer: HttpForall\nDate: %s \nContent-Type: text/plain\nContent-Length: 0 \n\n", |
---|
531 | "HTTP/1.1 404 Not Found\nServer: HttpForall\nDate: %s \nContent-Type: text/plain\nContent-Length: 0 \n\n", |
---|
532 | "HTTP/1.1 405 Method Not Allowed\nServer: HttpForall\nDate: %s \nContent-Type: text/plain\nContent-Length: 0 \n\n", |
---|
533 | "HTTP/1.1 408 Request Timeout\nServer: HttpForall\nDate: %s \nContent-Type: text/plain\nContent-Length: 0 \n\n", |
---|
534 | "HTTP/1.1 413 Payload Too Large\nServer: HttpForall\nDate: %s \nContent-Type: text/plain\nContent-Length: 0 \n\n", |
---|
535 | "HTTP/1.1 414 URI Too Long\nServer: HttpForall\nDate: %s \nContent-Type: text/plain\nContent-Length: 0 \n\n", |
---|
536 | }; |
---|
537 | |
---|
538 | struct date_buffer { |
---|
539 | https_msg_str strs[KNOWN_CODES]; |
---|
540 | }; |
---|
541 | |
---|
542 | thread DateFormater { |
---|
543 | int idx; |
---|
544 | date_buffer buffers[2]; |
---|
545 | }; |
---|
546 | |
---|
547 | void ?{}( DateFormater & this ) { |
---|
548 | ((thread&)this){ "Server Date Thread", *options.clopts.instance[0] }; |
---|
549 | this.idx = 0; |
---|
550 | memset( &this.buffers[0], 0, sizeof(this.buffers[0]) ); |
---|
551 | memset( &this.buffers[1], 0, sizeof(this.buffers[1]) ); |
---|
552 | } |
---|
553 | |
---|
554 | void main(DateFormater & this) { |
---|
555 | LOOP: for() { |
---|
556 | waitfor( ^?{} : this) { |
---|
557 | break LOOP; |
---|
558 | } |
---|
559 | or else {} |
---|
560 | |
---|
561 | |
---|
562 | char buff[100]; |
---|
563 | Time now = timeHiRes(); |
---|
564 | strftime( buff, 100, "%a, %d %b %Y %H:%M:%S %Z", now ); |
---|
565 | // if( options.log ) sout | "Updated date to '" | buff | "'"; |
---|
566 | |
---|
567 | for(i; KNOWN_CODES) { |
---|
568 | size_t len = snprintf( this.buffers[this.idx].strs[i].msg, 512, original_http_msgs[i], buff ); |
---|
569 | this.buffers[this.idx].strs[i].len = len; |
---|
570 | } |
---|
571 | |
---|
572 | for(i; KNOWN_CODES) { |
---|
573 | https_msg_str * next = &this.buffers[this.idx].strs[i]; |
---|
574 | __atomic_exchange_n((https_msg_str * volatile *)&http_msgs[i], next, __ATOMIC_SEQ_CST); |
---|
575 | } |
---|
576 | this.idx = (this.idx + 1) % 2; |
---|
577 | |
---|
578 | // if( options.log ) sout | "Date thread sleeping"; |
---|
579 | |
---|
580 | sleep(1`s); |
---|
581 | } |
---|
582 | } |
---|
583 | |
---|
584 | //============================================================================================= |
---|
585 | DateFormater * the_date_formatter; |
---|
586 | |
---|
587 | void init_protocol(void) { |
---|
588 | the_date_formatter = alloc(); |
---|
589 | (*the_date_formatter){}; |
---|
590 | } |
---|
591 | |
---|
592 | void deinit_protocol(void) { |
---|
593 | ^(*the_date_formatter){}; |
---|
594 | free( the_date_formatter ); |
---|
595 | } |
---|