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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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15 * "ngx_sprintf(text, "%ud.%ud.%ud.%ud", p[0], p[1], p[2], p[3])",
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16 * however, they were implemented long before the ngx_sprintf() appeared
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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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16
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24 static ngx_inline size_t ngx_sprint_uchar(u_char *text, u_char c, size_t len)
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0
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25 {
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26 size_t n;
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27 ngx_uint_t c1, c2;
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28
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29 n = 0;
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30
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31 if (len == n) {
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32 return n;
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33 }
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34
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35 c1 = c / 100;
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36
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37 if (c1) {
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38 *text++ = (u_char) (c1 + '0');
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39 n++;
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40
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41 if (len == n) {
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42 return n;
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43 }
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44 }
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45
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46 c2 = (c % 100) / 10;
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47
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48 if (c1 || c2) {
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49 *text++ = (u_char) (c2 + '0');
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50 n++;
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51
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52 if (len == n) {
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53 return n;
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54 }
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55 }
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56
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57 c2 = c % 10;
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58
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59 *text++ = (u_char) (c2 + '0');
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60 n++;
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61
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62 return n;
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63 }
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64
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65
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66 /* AF_INET only */
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67
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28
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68 size_t ngx_sock_ntop(int family, struct sockaddr *sa, u_char *text,
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0
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69 size_t len)
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70 {
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71 u_char *p;
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72 size_t n;
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73 ngx_uint_t i;
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28
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74 struct sockaddr_in *sin;
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0
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75
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76 if (len == 0) {
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77 return 0;
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78 }
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79
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80 if (family != AF_INET) {
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81 return 0;
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82 }
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83
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28
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84 sin = (struct sockaddr_in *) sa;
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85 p = (u_char *) &sin->sin_addr;
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0
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86
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87 if (len > INET_ADDRSTRLEN) {
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88 len = INET_ADDRSTRLEN;
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89 }
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90
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91 n = ngx_sprint_uchar(text, p[0], len);
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92
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93 i = 1;
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94
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95 do {
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96 if (len == n) {
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97 text[n - 1] = '\0';
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98 return n;
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99 }
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100
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101 text[n++] = '.';
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102
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103 if (len == n) {
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104 text[n - 1] = '\0';
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105 return n;
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106 }
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107
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108 n += ngx_sprint_uchar(&text[n], p[i++], len - n);
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109
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110 } while (i < 4);
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111
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112 if (len == n) {
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113 text[n] = '\0';
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114 return n;
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115 }
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116
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117 text[n] = '\0';
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118
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119 return n;
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120 }
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121
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122 size_t ngx_inet_ntop(int family, void *addr, u_char *text, size_t len)
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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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176 ngx_int_t ngx_ptocidr(ngx_str_t *text, void *cidr)
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177 {
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178 ngx_int_t m;
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179 ngx_uint_t i;
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180 ngx_inet_cidr_t *in_cidr;
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181
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182 in_cidr = cidr;
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183
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184 for (i = 0; i < text->len; i++) {
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185 if (text->data[i] == '/') {
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186 break;
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187 }
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188 }
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189
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190 if (i == text->len) {
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191 return NGX_ERROR;
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192 }
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193
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194 text->data[i] = '\0';
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195 in_cidr->addr = inet_addr((char *) text->data);
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196 text->data[i] = '/';
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197 if (in_cidr->addr == INADDR_NONE) {
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198 return NGX_ERROR;
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199 }
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200
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201 m = ngx_atoi(&text->data[i + 1], text->len - (i + 1));
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202 if (m == NGX_ERROR) {
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203 return NGX_ERROR;
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204 }
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205
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206 if (m == 0) {
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207
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208 /* the x86 compilers use the shl instruction that shifts by modulo 32 */
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209
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210 in_cidr->mask = 0;
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211 return NGX_OK;
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212 }
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213
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214 in_cidr->mask = htonl((ngx_uint_t) (0 - (1 << (32 - m))));
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215
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216 return NGX_OK;
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217 }
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218
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219
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28
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220 ngx_peers_t *ngx_inet_upstream_parse(ngx_conf_t *cf, ngx_inet_upstream_t *u)
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0
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221 {
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28
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222 char *err;
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223 u_char *host;
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224 in_addr_t in_addr;
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225 ngx_uint_t i, len;
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226 ngx_peers_t *peers;
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227 struct hostent *h;
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228 struct sockaddr_in *sin;
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229
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230 err = ngx_inet_parse_host_port(u);
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231
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232 if (err) {
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233 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
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234 "%s in upstream \"%V\"", err, &u->name);
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235 return NULL;
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236 }
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237
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238 if (u->default_port) {
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239 if (u->default_port_value == 0) {
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240 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
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241 "no port in upstream \"%V\"", &u->name);
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242 return NULL;
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243 }
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244
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245 u->port = u->default_port_value;
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246
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50
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247 u->port_text.data = ngx_palloc(cf->pool, sizeof("65536") - 1);
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248 if (u->port_text.data == NULL) {
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28
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249 return NULL;
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250 }
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251
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252 u->port_text.len = ngx_sprintf(u->port_text.data, "%d",
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253 u->default_port_value)
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254 - u->port_text.data;
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255
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256 } else if (u->port) {
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257 if (u->port == u->default_port_value) {
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258 u->default_port = 1;
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259 }
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260
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261 } else {
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262 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
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263 "no port in upstream \"%V\"", &u->name);
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264 return NULL;
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265 }
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266
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267 if (u->host.len == 0) {
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268 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
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269 "no host in upstream \"%V\"", &u->name);
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270 return NULL;
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271 }
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272
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273 u->port = htons(u->port);
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274
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50
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275 host = ngx_palloc(cf->pool, u->host.len + 1);
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276 if (host == NULL) {
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28
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277 return NULL;
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278 }
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279
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280 ngx_cpystrn(host, u->host.data, u->host.len + 1);
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281
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282 /* AF_INET only */
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283
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284 in_addr = inet_addr((char *) host);
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285
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286 if (in_addr == INADDR_NONE) {
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287 h = gethostbyname((char *) host);
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288
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289 if (h == NULL || h->h_addr_list[0] == NULL) {
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290 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
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291 "host %s is not found in upstream \"%V\"",
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292 host, &u->name);
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293 return NULL;
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294 }
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295
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296 for (i = 0; h->h_addr_list[i] != NULL; i++) { /* void */ }
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297
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298 /* MP: ngx_shared_palloc() */
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299
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300 peers = ngx_pcalloc(cf->pool,
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301 sizeof(ngx_peers_t) + sizeof(ngx_peer_t) * (i - 1));
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302 if (peers == NULL) {
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303 return NULL;
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304 }
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305
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306 peers->number = i;
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307 peers->weight = 1;
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308
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309 for (i = 0; h->h_addr_list[i] != NULL; i++) {
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310
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50
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311 sin = ngx_pcalloc(cf->pool, sizeof(struct sockaddr_in));
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312 if (sin == NULL) {
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28
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313 return NULL;
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314 }
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315
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316 sin->sin_family = AF_INET;
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317 sin->sin_port = u->port;
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36
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318 sin->sin_addr.s_addr = *(in_addr_t *) (h->h_addr_list[i]);
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28
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319
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320 peers->peer[i].sockaddr = (struct sockaddr *) sin;
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321 peers->peer[i].socklen = sizeof(struct sockaddr_in);
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322
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323 len = INET_ADDRSTRLEN - 1 + 1 + u->port_text.len;
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324
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50
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325 peers->peer[i].name.data = ngx_palloc(cf->pool, len);
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326 if (peers->peer[i].name.data == NULL) {
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28
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327 return NULL;
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328 }
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329
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330 len = ngx_sock_ntop(AF_INET, (struct sockaddr *) sin,
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331 peers->peer[i].name.data, len);
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332
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333 peers->peer[i].name.data[len++] = ':';
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0
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334
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28
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335 ngx_memcpy(peers->peer[i].name.data + len,
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336 u->port_text.data, u->port_text.len);
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337
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338 peers->peer[i].name.len = len + u->port_text.len;
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339
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340 peers->peer[i].uri_separator = "";
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341
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342 peers->peer[i].weight = 1;
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343 peers->peer[i].max_fails = 1;
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344 peers->peer[i].fail_timeout = 60;
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345 }
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346
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347 } else {
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348
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349 /* MP: ngx_shared_palloc() */
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350
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50
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351 peers = ngx_pcalloc(cf->pool, sizeof(ngx_peers_t));
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352 if (peers == NULL) {
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28
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353 return NULL;
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354 }
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355
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50
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356 sin = ngx_pcalloc(cf->pool, sizeof(struct sockaddr_in));
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357 if (sin == NULL) {
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28
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358 return NULL;
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359 }
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360
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361 peers->number = 1;
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362
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363 sin->sin_family = AF_INET;
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364 sin->sin_port = u->port;
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365 sin->sin_addr.s_addr = in_addr;
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366
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367 peers->peer[0].sockaddr = (struct sockaddr *) sin;
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368 peers->peer[0].socklen = sizeof(struct sockaddr_in);
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369
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370 len = u->host.len + 1 + u->port_text.len;
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371
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372 peers->peer[0].name.len = len;
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373
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50
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374 peers->peer[0].name.data = ngx_palloc(cf->pool, len);
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375 if (peers->peer[0].name.data == NULL) {
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28
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376 return NULL;
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377 }
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378
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379 len = u->host.len;
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380
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381 ngx_memcpy(peers->peer[0].name.data, u->host.data, len);
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382
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383 peers->peer[0].name.data[len++] = ':';
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384
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385 ngx_memcpy(peers->peer[0].name.data + len,
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386 u->port_text.data, u->port_text.len);
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387
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388 peers->peer[0].uri_separator = "";
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389 }
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390
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391 return peers;
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392 }
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393
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394
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395 char *ngx_inet_parse_host_port(ngx_inet_upstream_t *u)
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396 {
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397 size_t i;
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398 ngx_int_t port;
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399 ngx_str_t *url;
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400
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401 url = &u->url;
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402
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403 if (u->port_only) {
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404 i = 0;
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405
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406 } else {
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407 if (url->data[0] == ':' || url->data[0] == '/') {
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408 return "invalid host";
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409 }
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410
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411 i = 1;
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412 }
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413
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414 u->host.data = url->data;
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415 u->host_header = *url;
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416
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417 for (/* void */; i < url->len; i++) {
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418
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419 if (url->data[i] == ':') {
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420 u->port_text.data = &url->data[i] + 1;
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421 u->host.len = i;
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422
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423 if (!u->uri_part) {
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424 u->port_text.len = &url->data[url->len] - u->port_text.data;
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425 break;
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426 }
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427 }
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428
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429 if (url->data[i] == '/') {
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430 u->uri.data = &url->data[i];
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431 u->uri.len = url->len - i;
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432 u->host_header.len = i;
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433
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434 if (u->host.len == 0) {
|
|
|
435 u->host.len = i;
|
|
|
436 }
|
|
|
437
|
|
|
438 if (u->port_text.data == NULL) {
|
|
|
439 u->default_port = 1;
|
|
|
440 return NULL;
|
|
|
441 }
|
|
|
442
|
|
|
443 u->port_text.len = &url->data[i] - u->port_text.data;
|
|
|
444
|
|
|
445 if (u->port_text.len == 0) {
|
|
|
446 return "invalid port";
|
|
|
447 }
|
|
|
448
|
|
0
|
449 break;
|
|
|
450 }
|
|
|
451 }
|
|
|
452
|
|
28
|
453 if (u->port_text.data == NULL) {
|
|
|
454 port = ngx_atoi(url->data, url->len);
|
|
|
455
|
|
|
456 if (port == NGX_ERROR) {
|
|
|
457 u->default_port = 1;
|
|
|
458 u->host.len = url->len;
|
|
|
459
|
|
|
460 return NULL;
|
|
|
461 }
|
|
0
|
462
|
|
28
|
463 u->port_text = *url;
|
|
|
464 u->wildcard = 1;
|
|
0
|
465
|
|
28
|
466 } else {
|
|
|
467 if (u->port_text.len == 0) {
|
|
|
468 return "no URI";
|
|
|
469 }
|
|
|
470
|
|
|
471 port = ngx_atoi(u->port_text.data, u->port_text.len);
|
|
|
472
|
|
|
473 if (port == NGX_ERROR || port < 1 || port > 65536) {
|
|
|
474 return "invalid port";
|
|
|
475 }
|
|
0
|
476 }
|
|
|
477
|
|
28
|
478 u->port = (in_port_t) port;
|
|
0
|
479
|
|
28
|
480 return NULL;
|
|
0
|
481 }
|
