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