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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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326
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217 if (in_cidr->addr == (in_cidr->addr & in_cidr->mask)) {
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218 return NGX_OK;
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219 }
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220
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221 in_cidr->addr &= in_cidr->mask;
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222
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223 return NGX_DONE;
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0
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224 }
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225
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226
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200
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227 ngx_int_t
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340
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228 ngx_parse_url(ngx_pool_t *pool, ngx_url_t *u)
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200
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229 {
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266
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230 u_char *p, *host, *port_start;
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231 size_t len, port_len;
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200
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232 ngx_int_t port;
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233 ngx_uint_t i;
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252
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234 struct hostent *h;
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200
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235 #if (NGX_HAVE_UNIX_DOMAIN)
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236 struct sockaddr_un *saun;
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237 #endif
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238
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239 len = u->url.len;
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240 p = u->url.data;
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241
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286
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242 if (ngx_strncasecmp(p, (u_char *) "unix:", 5) == 0) {
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200
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243
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244 #if (NGX_HAVE_UNIX_DOMAIN)
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245
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246 p += 5;
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247 len -= 5;
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248
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236
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249 u->uri.len = len;
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250 u->uri.data = p;
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251
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200
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252 if (u->uri_part) {
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253 for (i = 0; i < len; i++) {
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254
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255 if (p[i] == ':') {
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256 len = i;
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257
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258 u->uri.len -= len + 1;
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259 u->uri.data += len + 1;
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260
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261 break;
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262 }
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263 }
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264 }
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265
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266 if (len == 0) {
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267 u->err = "no path in the unix domain socket";
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268 return NGX_ERROR;
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269 }
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270
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271 if (len + 1 > sizeof(saun->sun_path)) {
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272 u->err = "too long path in the unix domain socket";
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273 return NGX_ERROR;
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274 }
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275
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340
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276 u->addrs = ngx_pcalloc(pool, sizeof(ngx_peer_addr_t));
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260
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277 if (u->addrs == NULL) {
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200
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278 return NGX_ERROR;
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279 }
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280
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340
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281 saun = ngx_pcalloc(pool, sizeof(struct sockaddr_un));
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200
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282 if (saun == NULL) {
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283 return NGX_ERROR;
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284 }
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285
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260
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286 u->naddrs = 1;
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200
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287
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288 saun->sun_family = AF_UNIX;
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289 (void) ngx_cpystrn((u_char *) saun->sun_path, p, len + 1);
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290
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260
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291 u->addrs[0].sockaddr = (struct sockaddr *) saun;
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292 u->addrs[0].socklen = sizeof(struct sockaddr_un);
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293 u->addrs[0].name.len = len + 5;
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294 u->addrs[0].name.data = u->url.data;
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200
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295
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262
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296 u->host.len = len;
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297 u->host.data = p;
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298
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266
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299 u->unix_socket = 1;
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200
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300
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301 return NGX_OK;
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302
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303 #else
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304 u->err = "the unix domain sockets are not supported on this platform";
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305
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306 return NGX_ERROR;
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307
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308 #endif
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309 }
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310
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311 if ((p[0] == ':' || p[0] == '/') && !u->listen) {
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312 u->err = "invalid host";
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313 return NGX_ERROR;
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314 }
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315
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316 u->host.data = p;
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266
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317
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318 port_start = NULL;
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319 port_len = 0;
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200
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320
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321 for (i = 0; i < len; i++) {
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322
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323 if (p[i] == ':') {
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266
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324 port_start = &p[i + 1];
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200
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325 u->host.len = i;
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326
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327 if (!u->uri_part) {
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266
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328 port_len = len - (i + 1);
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200
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329 break;
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330 }
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331 }
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332
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333 if (p[i] == '/') {
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334 u->uri.len = len - i;
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335 u->uri.data = &p[i];
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336
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337 if (u->host.len == 0) {
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338 u->host.len = i;
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339 }
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340
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266
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341 if (port_start == NULL) {
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260
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342 u->no_port = 1;
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343 goto no_port;
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200
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344 }
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345
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266
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346 port_len = &p[i] - port_start;
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200
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347
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266
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348 if (port_len == 0) {
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200
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349 u->err = "invalid port";
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350 return NGX_ERROR;
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351 }
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352
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353 break;
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354 }
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355 }
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356
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266
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357 if (port_start) {
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200
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358
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266
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359 if (port_len == 0) {
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360 port_len = &p[i] - port_start;
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200
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361
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266
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362 if (port_len == 0) {
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200
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363 u->err = "invalid port";
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364 return NGX_ERROR;
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365 }
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366 }
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367
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266
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368 port = ngx_atoi(port_start, port_len);
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200
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369
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370 if (port == NGX_ERROR || port < 1 || port > 65536) {
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371 u->err = "invalid port";
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372 return NGX_ERROR;
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373 }
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374
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375 } else {
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376 port = ngx_atoi(p, len);
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377
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378 if (port == NGX_ERROR) {
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379 u->host.len = len;
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260
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380 u->no_port = 1;
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200
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381
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260
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382 goto no_port;
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200
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383 }
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384
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385 u->wildcard = 1;
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386 }
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387
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266
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388 u->port = (in_port_t) port;
|
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200
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389
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260
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390 no_port:
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200
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391
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392 if (u->listen) {
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260
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393
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266
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394 if (u->port == 0) {
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395 if (u->default_port == 0) {
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252
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396 u->err = "no port";
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397 return NGX_ERROR;
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398 }
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399
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266
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400 u->port = u->default_port;
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252
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401 }
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402
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|
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403 if (u->host.len == 1 && u->host.data[0] == '*') {
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404 u->host.len = 0;
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405 }
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406
|
|
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407 /* AF_INET only */
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408
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|
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409 if (u->host.len) {
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410
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340
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411 host = ngx_alloc(u->host.len + 1, pool->log);
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412 if (host == NULL) {
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413 return NGX_ERROR;
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414 }
|
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252
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415
|
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340
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416 (void) ngx_cpystrn(host, u->host.data, u->host.len + 1);
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252
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417
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418 u->addr.in_addr = inet_addr((const char *) host);
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419
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|
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420 if (u->addr.in_addr == INADDR_NONE) {
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421 h = gethostbyname((const char *) host);
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422
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|
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423 if (h == NULL || h->h_addr_list[0] == NULL) {
|
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340
|
424 ngx_free(host);
|
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252
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425 u->err = "host not found";
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426 return NGX_ERROR;
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|
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427 }
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|
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428
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|
266
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429 u->addr.in_addr = *(in_addr_t *) (h->h_addr_list[0]);
|
|
252
|
430 }
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431
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340
|
432 ngx_free(host);
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433
|
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252
|
434 } else {
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435 u->addr.in_addr = INADDR_ANY;
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436 }
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|
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437
|
|
200
|
438 return NGX_OK;
|
|
|
439 }
|
|
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440
|
|
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441 if (u->host.len == 0) {
|
|
|
442 u->err = "no host";
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|
|
443 return NGX_ERROR;
|
|
|
444 }
|
|
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445
|
|
260
|
446 if (u->no_resolve) {
|
|
|
447 return NGX_OK;
|
|
200
|
448 }
|
|
|
449
|
|
266
|
450 if (u->no_port) {
|
|
|
451 u->port = u->default_port;
|
|
|
452 }
|
|
|
453
|
|
|
454 if (u->port == 0) {
|
|
|
455 u->err = "no port";
|
|
|
456 return NGX_ERROR;
|
|
|
457 }
|
|
|
458
|
|
340
|
459 if (ngx_inet_resolve_host(pool, u) != NGX_OK) {
|
|
200
|
460 return NGX_ERROR;
|
|
|
461 }
|
|
|
462
|
|
|
463 return NGX_OK;
|
|
|
464 }
|
|
|
465
|
|
|
466
|
|
260
|
467 ngx_int_t
|
|
340
|
468 ngx_inet_resolve_host(ngx_pool_t *pool, ngx_url_t *u)
|
|
200
|
469 {
|
|
266
|
470 u_char *p, *host;
|
|
200
|
471 size_t len;
|
|
|
472 in_addr_t in_addr;
|
|
|
473 ngx_uint_t i;
|
|
|
474 struct hostent *h;
|
|
|
475 struct sockaddr_in *sin;
|
|
|
476
|
|
340
|
477 host = ngx_alloc(u->host.len + 1, pool->log);
|
|
200
|
478 if (host == NULL) {
|
|
260
|
479 return NGX_ERROR;
|
|
200
|
480 }
|
|
|
481
|
|
260
|
482 (void) ngx_cpystrn(host, u->host.data, u->host.len + 1);
|
|
200
|
483
|
|
|
484 /* AF_INET only */
|
|
|
485
|
|
|
486 in_addr = inet_addr((char *) host);
|
|
|
487
|
|
|
488 if (in_addr == INADDR_NONE) {
|
|
|
489 h = gethostbyname((char *) host);
|
|
|
490
|
|
340
|
491 ngx_free(host);
|
|
|
492
|
|
200
|
493 if (h == NULL || h->h_addr_list[0] == NULL) {
|
|
260
|
494 u->err = "host not found";
|
|
|
495 return NGX_ERROR;
|
|
200
|
496 }
|
|
|
497
|
|
260
|
498 if (u->one_addr == 0) {
|
|
|
499 for (i = 0; h->h_addr_list[i] != NULL; i++) { /* void */ }
|
|
|
500
|
|
|
501 } else {
|
|
|
502 i = 1;
|
|
|
503 }
|
|
200
|
504
|
|
|
505 /* MP: ngx_shared_palloc() */
|
|
|
506
|
|
340
|
507 u->addrs = ngx_pcalloc(pool, i * sizeof(ngx_peer_addr_t));
|
|
260
|
508 if (u->addrs == NULL) {
|
|
|
509 return NGX_ERROR;
|
|
200
|
510 }
|
|
|
511
|
|
260
|
512 u->naddrs = i;
|
|
200
|
513
|
|
|
514 for (i = 0; h->h_addr_list[i] != NULL; i++) {
|
|
|
515
|
|
340
|
516 sin = ngx_pcalloc(pool, sizeof(struct sockaddr_in));
|
|
200
|
517 if (sin == NULL) {
|
|
260
|
518 return NGX_ERROR;
|
|
200
|
519 }
|
|
|
520
|
|
|
521 sin->sin_family = AF_INET;
|
|
266
|
522 sin->sin_port = htons(u->port);
|
|
200
|
523 sin->sin_addr.s_addr = *(in_addr_t *) (h->h_addr_list[i]);
|
|
|
524
|
|
260
|
525 u->addrs[i].sockaddr = (struct sockaddr *) sin;
|
|
|
526 u->addrs[i].socklen = sizeof(struct sockaddr_in);
|
|
200
|
527
|
|
|
528 len = INET_ADDRSTRLEN - 1 + 1 + sizeof(":65536") - 1;
|
|
|
529
|
|
340
|
530 p = ngx_palloc(pool, len);
|
|
266
|
531 if (p == NULL) {
|
|
260
|
532 return NGX_ERROR;
|
|
200
|
533 }
|
|
|
534
|
|
266
|
535 len = ngx_sock_ntop(AF_INET, (struct sockaddr *) sin, p, len);
|
|
200
|
536
|
|
266
|
537 u->addrs[i].name.len = ngx_sprintf(&p[len], ":%d", u->port) - p;
|
|
|
538 u->addrs[i].name.data = p;
|
|
200
|
539 }
|
|
|
540
|
|
|
541 } else {
|
|
|
542
|
|
340
|
543 ngx_free(host);
|
|
|
544
|
|
200
|
545 /* MP: ngx_shared_palloc() */
|
|
|
546
|
|
340
|
547 u->addrs = ngx_pcalloc(pool, sizeof(ngx_peer_addr_t));
|
|
260
|
548 if (u->addrs == NULL) {
|
|
|
549 return NGX_ERROR;
|
|
200
|
550 }
|
|
|
551
|
|
340
|
552 sin = ngx_pcalloc(pool, sizeof(struct sockaddr_in));
|
|
200
|
553 if (sin == NULL) {
|
|
260
|
554 return NGX_ERROR;
|
|
200
|
555 }
|
|
|
556
|
|
260
|
557 u->naddrs = 1;
|
|
200
|
558
|
|
|
559 sin->sin_family = AF_INET;
|
|
266
|
560 sin->sin_port = htons(u->port);
|
|
200
|
561 sin->sin_addr.s_addr = in_addr;
|
|
|
562
|
|
260
|
563 u->addrs[0].sockaddr = (struct sockaddr *) sin;
|
|
|
564 u->addrs[0].socklen = sizeof(struct sockaddr_in);
|
|
200
|
565
|
|
340
|
566 p = ngx_palloc(pool, u->host.len + sizeof(":65536") - 1);
|
|
266
|
567 if (p == NULL) {
|
|
260
|
568 return NGX_ERROR;
|
|
200
|
569 }
|
|
|
570
|
|
266
|
571 u->addrs[0].name.len = ngx_sprintf(p, "%V:%d", &u->host, u->port) - p;
|
|
|
572 u->addrs[0].name.data = p;
|
|
200
|
573 }
|
|
|
574
|
|
260
|
575 return NGX_OK;
|
|
200
|
576 }
|
