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