0
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 */
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5
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6
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7 #include <ngx_config.h>
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8 #include <ngx_core.h>
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9
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10
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348
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11 /* AF_INET only */
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12
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13 in_addr_t
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14 ngx_inet_addr(u_char *text, size_t len)
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15 {
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16 u_char *p, c;
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17 in_addr_t addr;
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18 ngx_uint_t octet, n;
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19
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20 addr = 0;
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21 octet = 0;
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22 n = 0;
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23
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24 for (p = text; p < text + len; p++) {
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25
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26 c = *p;
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27
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28 if (c >= '0' && c <= '9') {
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29 octet = octet * 10 + (c - '0');
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30 continue;
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31 }
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32
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33 if (c == '.' && octet < 256) {
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34 addr = (addr << 8) + octet;
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35 octet = 0;
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36 n++;
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37 continue;
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38 }
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39
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40 return INADDR_NONE;
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41 }
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42
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43 if (n != 3) {
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44 return INADDR_NONE;
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45 }
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46
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47 if (octet < 256) {
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48 addr = (addr << 8) + octet;
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49 return htonl(addr);
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50 }
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51
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52 return INADDR_NONE;
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53 }
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54
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55
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10
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56 /*
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57 * ngx_sock_ntop() and ngx_inet_ntop() may be implemented as
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130
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58 * "ngx_sprintf(text, "%ud.%ud.%ud.%ud", p[0], p[1], p[2], p[3])", however,
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59 * they had been implemented long before the ngx_sprintf() had appeared
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10
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60 * and they are faster by 1.5-2.5 times, so it is worth to keep them.
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61 *
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62 * By the way, the implementation using ngx_sprintf() is faster by 2.5-3 times
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28
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63 * than using FreeBSD libc's snprintf().
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10
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64 */
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65
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66
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180
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67 static ngx_inline size_t
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68 ngx_sprint_uchar(u_char *text, u_char c, size_t len)
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0
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69 {
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70 size_t n;
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71 ngx_uint_t c1, c2;
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72
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73 n = 0;
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74
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75 if (len == n) {
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76 return n;
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77 }
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78
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79 c1 = c / 100;
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80
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81 if (c1) {
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82 *text++ = (u_char) (c1 + '0');
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83 n++;
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84
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85 if (len == n) {
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86 return n;
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87 }
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88 }
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89
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90 c2 = (c % 100) / 10;
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91
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92 if (c1 || c2) {
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93 *text++ = (u_char) (c2 + '0');
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94 n++;
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95
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96 if (len == n) {
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97 return n;
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98 }
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99 }
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100
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101 c2 = c % 10;
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102
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103 *text++ = (u_char) (c2 + '0');
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104 n++;
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105
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106 return n;
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107 }
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108
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109
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110 /* AF_INET only */
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111
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58
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112 size_t
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113 ngx_sock_ntop(int family, struct sockaddr *sa, u_char *text, size_t len)
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0
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114 {
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115 u_char *p;
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116 size_t n;
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117 ngx_uint_t i;
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28
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118 struct sockaddr_in *sin;
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0
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119
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120 if (len == 0) {
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121 return 0;
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122 }
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123
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124 if (family != AF_INET) {
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125 return 0;
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126 }
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127
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28
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128 sin = (struct sockaddr_in *) sa;
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129 p = (u_char *) &sin->sin_addr;
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0
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130
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131 if (len > INET_ADDRSTRLEN) {
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132 len = INET_ADDRSTRLEN;
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133 }
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134
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135 n = ngx_sprint_uchar(text, p[0], len);
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136
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137 i = 1;
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138
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139 do {
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140 if (len == n) {
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141 text[n - 1] = '\0';
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142 return n;
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143 }
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144
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145 text[n++] = '.';
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146
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147 if (len == n) {
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148 text[n - 1] = '\0';
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149 return n;
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150 }
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151
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152 n += ngx_sprint_uchar(&text[n], p[i++], len - n);
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153
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154 } while (i < 4);
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155
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156 if (len == n) {
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157 text[n] = '\0';
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158 return n;
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159 }
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160
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161 text[n] = '\0';
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162
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163 return n;
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164 }
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165
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58
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166 size_t
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167 ngx_inet_ntop(int family, void *addr, u_char *text, size_t len)
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0
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168 {
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169 u_char *p;
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170 size_t n;
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171 ngx_uint_t i;
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172
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173 if (len == 0) {
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174 return 0;
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175 }
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176
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177 if (family != AF_INET) {
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178 return 0;
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179 }
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180
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181 p = (u_char *) addr;
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182
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183 if (len > INET_ADDRSTRLEN) {
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184 len = INET_ADDRSTRLEN;
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185 }
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186
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187 n = ngx_sprint_uchar(text, p[0], len);
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188
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189 i = 1;
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190
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191 do {
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192 if (len == n) {
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193 text[n - 1] = '\0';
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194 return n;
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195 }
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196
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197 text[n++] = '.';
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198
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199 if (len == n) {
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200 text[n - 1] = '\0';
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201 return n;
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202 }
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203
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204 n += ngx_sprint_uchar(&text[n], p[i++], len - n);
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205
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206 } while (i < 4);
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207
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208 if (len == n) {
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209 text[n] = '\0';
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210 return n;
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211 }
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212
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213 text[n] = '\0';
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214
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215 return n;
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216 }
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217
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218
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219 /* AF_INET only */
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220
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58
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221 ngx_int_t
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222 ngx_ptocidr(ngx_str_t *text, void *cidr)
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0
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223 {
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224 ngx_int_t m;
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225 ngx_uint_t i;
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226 ngx_inet_cidr_t *in_cidr;
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227
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228 in_cidr = cidr;
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229
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230 for (i = 0; i < text->len; i++) {
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231 if (text->data[i] == '/') {
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232 break;
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233 }
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234 }
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235
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236 if (i == text->len) {
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237 return NGX_ERROR;
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238 }
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239
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240 text->data[i] = '\0';
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241 in_cidr->addr = inet_addr((char *) text->data);
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242 text->data[i] = '/';
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243 if (in_cidr->addr == INADDR_NONE) {
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244 return NGX_ERROR;
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245 }
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246
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247 m = ngx_atoi(&text->data[i + 1], text->len - (i + 1));
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248 if (m == NGX_ERROR) {
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249 return NGX_ERROR;
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250 }
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251
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252 if (m == 0) {
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253
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254 /* the x86 compilers use the shl instruction that shifts by modulo 32 */
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255
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256 in_cidr->mask = 0;
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257 return NGX_OK;
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258 }
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259
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260 in_cidr->mask = htonl((ngx_uint_t) (0 - (1 << (32 - m))));
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261
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326
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262 if (in_cidr->addr == (in_cidr->addr & in_cidr->mask)) {
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263 return NGX_OK;
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264 }
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265
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266 in_cidr->addr &= in_cidr->mask;
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267
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268 return NGX_DONE;
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0
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269 }
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270
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271
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200
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272 ngx_int_t
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340
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273 ngx_parse_url(ngx_pool_t *pool, ngx_url_t *u)
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200
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274 {
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266
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275 u_char *p, *host, *port_start;
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276 size_t len, port_len;
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200
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277 ngx_int_t port;
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278 ngx_uint_t i;
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252
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279 struct hostent *h;
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200
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280 #if (NGX_HAVE_UNIX_DOMAIN)
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281 struct sockaddr_un *saun;
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282 #endif
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283
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284 len = u->url.len;
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285 p = u->url.data;
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286
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286
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287 if (ngx_strncasecmp(p, (u_char *) "unix:", 5) == 0) {
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200
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288
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289 #if (NGX_HAVE_UNIX_DOMAIN)
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290
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291 p += 5;
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292 len -= 5;
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293
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236
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294 u->uri.len = len;
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295 u->uri.data = p;
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296
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200
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297 if (u->uri_part) {
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298 for (i = 0; i < len; i++) {
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299
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300 if (p[i] == ':') {
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301 len = i;
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302
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303 u->uri.len -= len + 1;
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304 u->uri.data += len + 1;
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305
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306 break;
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307 }
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308 }
|
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309 }
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310
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311 if (len == 0) {
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312 u->err = "no path in the unix domain socket";
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313 return NGX_ERROR;
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314 }
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315
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316 if (len + 1 > sizeof(saun->sun_path)) {
|
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317 u->err = "too long path in the unix domain socket";
|
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318 return NGX_ERROR;
|
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319 }
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320
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340
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321 u->addrs = ngx_pcalloc(pool, sizeof(ngx_peer_addr_t));
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260
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322 if (u->addrs == NULL) {
|
200
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323 return NGX_ERROR;
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324 }
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325
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340
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326 saun = ngx_pcalloc(pool, sizeof(struct sockaddr_un));
|
200
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327 if (saun == NULL) {
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328 return NGX_ERROR;
|
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329 }
|
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330
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260
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331 u->naddrs = 1;
|
200
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332
|
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333 saun->sun_family = AF_UNIX;
|
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334 (void) ngx_cpystrn((u_char *) saun->sun_path, p, len + 1);
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335
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260
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336 u->addrs[0].sockaddr = (struct sockaddr *) saun;
|
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337 u->addrs[0].socklen = sizeof(struct sockaddr_un);
|
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338 u->addrs[0].name.len = len + 5;
|
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339 u->addrs[0].name.data = u->url.data;
|
200
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340
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262
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341 u->host.len = len;
|
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342 u->host.data = p;
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343
|
266
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344 u->unix_socket = 1;
|
200
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345
|
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346 return NGX_OK;
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347
|
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348 #else
|
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349 u->err = "the unix domain sockets are not supported on this platform";
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350
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351 return NGX_ERROR;
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352
|
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353 #endif
|
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354 }
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355
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356 if ((p[0] == ':' || p[0] == '/') && !u->listen) {
|
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357 u->err = "invalid host";
|
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358 return NGX_ERROR;
|
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359 }
|
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360
|
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361 u->host.data = p;
|
266
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362
|
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363 port_start = NULL;
|
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364 port_len = 0;
|
200
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365
|
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366 for (i = 0; i < len; i++) {
|
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367
|
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368 if (p[i] == ':') {
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266
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369 port_start = &p[i + 1];
|
200
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370 u->host.len = i;
|
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371
|
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372 if (!u->uri_part) {
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266
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373 port_len = len - (i + 1);
|
200
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374 break;
|
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375 }
|
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376 }
|
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377
|
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378 if (p[i] == '/') {
|
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379 u->uri.len = len - i;
|
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380 u->uri.data = &p[i];
|
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381
|
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382 if (u->host.len == 0) {
|
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383 u->host.len = i;
|
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384 }
|
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385
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266
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386 if (port_start == NULL) {
|
260
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387 u->no_port = 1;
|
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388 goto no_port;
|
200
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389 }
|
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390
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266
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391 port_len = &p[i] - port_start;
|
200
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392
|
266
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393 if (port_len == 0) {
|
200
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394 u->err = "invalid port";
|
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395 return NGX_ERROR;
|
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396 }
|
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397
|
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398 break;
|
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399 }
|
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400 }
|
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401
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266
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402 if (port_start) {
|
200
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403
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266
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404 if (port_len == 0) {
|
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405 port_len = &p[i] - port_start;
|
200
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406
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266
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407 if (port_len == 0) {
|
200
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408 u->err = "invalid port";
|
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409 return NGX_ERROR;
|
|
410 }
|
|
411 }
|
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412
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266
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413 port = ngx_atoi(port_start, port_len);
|
200
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414
|
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415 if (port == NGX_ERROR || port < 1 || port > 65536) {
|
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416 u->err = "invalid port";
|
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417 return NGX_ERROR;
|
|
418 }
|
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419
|
354
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420 u->port_text.len = port_len;
|
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421 u->port_text.data = port_start;
|
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422
|
200
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423 } else {
|
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424 port = ngx_atoi(p, len);
|
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425
|
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426 if (port == NGX_ERROR) {
|
|
427 u->host.len = len;
|
260
|
428 u->no_port = 1;
|
200
|
429
|
260
|
430 goto no_port;
|
200
|
431 }
|
|
432
|
|
433 u->wildcard = 1;
|
|
434 }
|
|
435
|
266
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436 u->port = (in_port_t) port;
|
200
|
437
|
260
|
438 no_port:
|
200
|
439
|
|
440 if (u->listen) {
|
260
|
441
|
266
|
442 if (u->port == 0) {
|
|
443 if (u->default_port == 0) {
|
252
|
444 u->err = "no port";
|
|
445 return NGX_ERROR;
|
|
446 }
|
|
447
|
266
|
448 u->port = u->default_port;
|
252
|
449 }
|
|
450
|
|
451 if (u->host.len == 1 && u->host.data[0] == '*') {
|
|
452 u->host.len = 0;
|
|
453 }
|
|
454
|
|
455 /* AF_INET only */
|
|
456
|
|
457 if (u->host.len) {
|
|
458
|
340
|
459 host = ngx_alloc(u->host.len + 1, pool->log);
|
|
460 if (host == NULL) {
|
|
461 return NGX_ERROR;
|
|
462 }
|
252
|
463
|
340
|
464 (void) ngx_cpystrn(host, u->host.data, u->host.len + 1);
|
252
|
465
|
|
466 u->addr.in_addr = inet_addr((const char *) host);
|
|
467
|
|
468 if (u->addr.in_addr == INADDR_NONE) {
|
|
469 h = gethostbyname((const char *) host);
|
|
470
|
|
471 if (h == NULL || h->h_addr_list[0] == NULL) {
|
340
|
472 ngx_free(host);
|
252
|
473 u->err = "host not found";
|
|
474 return NGX_ERROR;
|
|
475 }
|
|
476
|
266
|
477 u->addr.in_addr = *(in_addr_t *) (h->h_addr_list[0]);
|
252
|
478 }
|
|
479
|
340
|
480 ngx_free(host);
|
|
481
|
252
|
482 } else {
|
|
483 u->addr.in_addr = INADDR_ANY;
|
|
484 }
|
|
485
|
200
|
486 return NGX_OK;
|
|
487 }
|
|
488
|
|
489 if (u->host.len == 0) {
|
|
490 u->err = "no host";
|
|
491 return NGX_ERROR;
|
|
492 }
|
|
493
|
260
|
494 if (u->no_resolve) {
|
|
495 return NGX_OK;
|
200
|
496 }
|
|
497
|
266
|
498 if (u->no_port) {
|
|
499 u->port = u->default_port;
|
|
500 }
|
|
501
|
|
502 if (u->port == 0) {
|
|
503 u->err = "no port";
|
|
504 return NGX_ERROR;
|
|
505 }
|
|
506
|
340
|
507 if (ngx_inet_resolve_host(pool, u) != NGX_OK) {
|
200
|
508 return NGX_ERROR;
|
|
509 }
|
|
510
|
|
511 return NGX_OK;
|
|
512 }
|
|
513
|
|
514
|
260
|
515 ngx_int_t
|
340
|
516 ngx_inet_resolve_host(ngx_pool_t *pool, ngx_url_t *u)
|
200
|
517 {
|
266
|
518 u_char *p, *host;
|
200
|
519 size_t len;
|
|
520 in_addr_t in_addr;
|
|
521 ngx_uint_t i;
|
|
522 struct hostent *h;
|
|
523 struct sockaddr_in *sin;
|
|
524
|
340
|
525 host = ngx_alloc(u->host.len + 1, pool->log);
|
200
|
526 if (host == NULL) {
|
260
|
527 return NGX_ERROR;
|
200
|
528 }
|
|
529
|
260
|
530 (void) ngx_cpystrn(host, u->host.data, u->host.len + 1);
|
200
|
531
|
|
532 /* AF_INET only */
|
|
533
|
|
534 in_addr = inet_addr((char *) host);
|
|
535
|
|
536 if (in_addr == INADDR_NONE) {
|
|
537 h = gethostbyname((char *) host);
|
|
538
|
340
|
539 ngx_free(host);
|
|
540
|
200
|
541 if (h == NULL || h->h_addr_list[0] == NULL) {
|
260
|
542 u->err = "host not found";
|
|
543 return NGX_ERROR;
|
200
|
544 }
|
|
545
|
260
|
546 if (u->one_addr == 0) {
|
|
547 for (i = 0; h->h_addr_list[i] != NULL; i++) { /* void */ }
|
|
548
|
|
549 } else {
|
|
550 i = 1;
|
|
551 }
|
200
|
552
|
|
553 /* MP: ngx_shared_palloc() */
|
|
554
|
340
|
555 u->addrs = ngx_pcalloc(pool, i * sizeof(ngx_peer_addr_t));
|
260
|
556 if (u->addrs == NULL) {
|
|
557 return NGX_ERROR;
|
200
|
558 }
|
|
559
|
260
|
560 u->naddrs = i;
|
200
|
561
|
|
562 for (i = 0; h->h_addr_list[i] != NULL; i++) {
|
|
563
|
340
|
564 sin = ngx_pcalloc(pool, sizeof(struct sockaddr_in));
|
200
|
565 if (sin == NULL) {
|
260
|
566 return NGX_ERROR;
|
200
|
567 }
|
|
568
|
|
569 sin->sin_family = AF_INET;
|
266
|
570 sin->sin_port = htons(u->port);
|
200
|
571 sin->sin_addr.s_addr = *(in_addr_t *) (h->h_addr_list[i]);
|
|
572
|
260
|
573 u->addrs[i].sockaddr = (struct sockaddr *) sin;
|
|
574 u->addrs[i].socklen = sizeof(struct sockaddr_in);
|
200
|
575
|
|
576 len = INET_ADDRSTRLEN - 1 + 1 + sizeof(":65536") - 1;
|
|
577
|
340
|
578 p = ngx_palloc(pool, len);
|
266
|
579 if (p == NULL) {
|
260
|
580 return NGX_ERROR;
|
200
|
581 }
|
|
582
|
266
|
583 len = ngx_sock_ntop(AF_INET, (struct sockaddr *) sin, p, len);
|
200
|
584
|
266
|
585 u->addrs[i].name.len = ngx_sprintf(&p[len], ":%d", u->port) - p;
|
|
586 u->addrs[i].name.data = p;
|
200
|
587 }
|
|
588
|
|
589 } else {
|
|
590
|
340
|
591 ngx_free(host);
|
|
592
|
200
|
593 /* MP: ngx_shared_palloc() */
|
|
594
|
340
|
595 u->addrs = ngx_pcalloc(pool, sizeof(ngx_peer_addr_t));
|
260
|
596 if (u->addrs == NULL) {
|
|
597 return NGX_ERROR;
|
200
|
598 }
|
|
599
|
340
|
600 sin = ngx_pcalloc(pool, sizeof(struct sockaddr_in));
|
200
|
601 if (sin == NULL) {
|
260
|
602 return NGX_ERROR;
|
200
|
603 }
|
|
604
|
260
|
605 u->naddrs = 1;
|
200
|
606
|
|
607 sin->sin_family = AF_INET;
|
266
|
608 sin->sin_port = htons(u->port);
|
200
|
609 sin->sin_addr.s_addr = in_addr;
|
|
610
|
260
|
611 u->addrs[0].sockaddr = (struct sockaddr *) sin;
|
|
612 u->addrs[0].socklen = sizeof(struct sockaddr_in);
|
200
|
613
|
340
|
614 p = ngx_palloc(pool, u->host.len + sizeof(":65536") - 1);
|
266
|
615 if (p == NULL) {
|
260
|
616 return NGX_ERROR;
|
200
|
617 }
|
|
618
|
266
|
619 u->addrs[0].name.len = ngx_sprintf(p, "%V:%d", &u->host, u->port) - p;
|
|
620 u->addrs[0].name.data = p;
|
200
|
621 }
|
|
622
|
260
|
623 return NGX_OK;
|
200
|
624 }
|