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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
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8 #include <ngx_config.h>
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9 #include <ngx_core.h>
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10
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11
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12 ngx_inline static size_t ngx_sprint_uchar(u_char *text, u_char c, size_t len)
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13 {
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14 size_t n;
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15 ngx_uint_t c1, c2;
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16
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17 n = 0;
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18
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19 if (len == n) {
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20 return n;
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21 }
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22
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23 c1 = c / 100;
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24
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25 if (c1) {
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26 *text++ = (u_char) (c1 + '0');
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27 n++;
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28
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29 if (len == n) {
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30 return n;
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31 }
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32 }
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33
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34 c2 = (c % 100) / 10;
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35
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36 if (c1 || c2) {
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37 *text++ = (u_char) (c2 + '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 % 10;
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46
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47 *text++ = (u_char) (c2 + '0');
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48 n++;
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49
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50 return n;
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51 }
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52
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53
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54 /* AF_INET only */
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55
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56 size_t ngx_sock_ntop(int family, struct sockaddr *addr, u_char *text,
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57 size_t len)
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58 {
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59 u_char *p;
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60 size_t n;
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61 ngx_uint_t i;
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62 struct sockaddr_in *addr_in;
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63
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64 if (len == 0) {
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65 return 0;
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66 }
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67
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68 if (family != AF_INET) {
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69 return 0;
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70 }
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71
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72 addr_in = (struct sockaddr_in *) addr;
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73 p = (u_char *) &addr_in->sin_addr;
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74
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75 if (len > INET_ADDRSTRLEN) {
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76 len = INET_ADDRSTRLEN;
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77 }
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78
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79 n = ngx_sprint_uchar(text, p[0], len);
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80
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81 i = 1;
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82
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83 do {
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84 if (len == n) {
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85 text[n - 1] = '\0';
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86 return n;
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87 }
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88
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89 text[n++] = '.';
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90
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91 if (len == n) {
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92 text[n - 1] = '\0';
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93 return n;
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94 }
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95
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96 n += ngx_sprint_uchar(&text[n], p[i++], len - n);
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97
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98 } while (i < 4);
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99
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100 if (len == n) {
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101 text[n] = '\0';
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102 return n;
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103 }
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104
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105 text[n] = '\0';
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106
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107 return n;
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108
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109 #if 0
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110 return ngx_snprintf((char *) text,
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111 len > INET_ADDRSTRLEN ? INET_ADDRSTRLEN : len,
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112 "%u.%u.%u.%u", p[0], p[1], p[2], p[3]);
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113 #endif
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114 }
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115
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116
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117 size_t ngx_inet_ntop(int family, void *addr, u_char *text, size_t len)
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118 {
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119 u_char *p;
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120 size_t n;
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121 ngx_uint_t i;
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122
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123 if (len == 0) {
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124 return 0;
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125 }
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126
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127 if (family != AF_INET) {
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128 return 0;
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129 }
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130
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131 p = (u_char *) addr;
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132
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133 if (len > INET_ADDRSTRLEN) {
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134 len = INET_ADDRSTRLEN;
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135 }
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136
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137 n = ngx_sprint_uchar(text, p[0], len);
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138
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139 i = 1;
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140
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141 do {
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142 if (len == n) {
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143 text[n - 1] = '\0';
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144 return n;
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145 }
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146
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147 text[n++] = '.';
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148
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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 n += ngx_sprint_uchar(&text[n], p[i++], len - n);
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155
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156 } while (i < 4);
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157
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158 if (len == n) {
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159 text[n] = '\0';
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160 return n;
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161 }
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162
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163 text[n] = '\0';
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164
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165 return n;
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166
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167 #if 0
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168 return ngx_snprintf((char *) text,
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169 len > INET_ADDRSTRLEN ? INET_ADDRSTRLEN : len,
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170 "%u.%u.%u.%u", p[0], p[1], p[2], p[3]);
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171 #endif
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172 }
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173
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174
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175 /* AF_INET only */
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176
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177 ngx_int_t ngx_ptocidr(ngx_str_t *text, void *cidr)
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178 {
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179 ngx_int_t m;
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180 ngx_uint_t i;
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181 ngx_inet_cidr_t *in_cidr;
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182
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183 in_cidr = cidr;
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184
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185 for (i = 0; i < text->len; i++) {
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186 if (text->data[i] == '/') {
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187 break;
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188 }
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189 }
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190
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191 if (i == text->len) {
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192 return NGX_ERROR;
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193 }
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194
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195 text->data[i] = '\0';
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196 in_cidr->addr = inet_addr((char *) text->data);
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197 text->data[i] = '/';
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198 if (in_cidr->addr == INADDR_NONE) {
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199 return NGX_ERROR;
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200 }
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201
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202 m = ngx_atoi(&text->data[i + 1], text->len - (i + 1));
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203 if (m == NGX_ERROR) {
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204 return NGX_ERROR;
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205 }
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206
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207 if (m == 0) {
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208
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209 /* the x86 compilers use the shl instruction that shifts by modulo 32 */
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210
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211 in_cidr->mask = 0;
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212 return NGX_OK;
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213 }
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214
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215 in_cidr->mask = htonl((ngx_uint_t) (0 - (1 << (32 - m))));
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216
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217 return NGX_OK;
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218 }
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219
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220
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221 #if 0
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222
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223 ngx_int_t ngx_inet_addr_port(ngx_conf_t *cf, ngx_command_t *cmd,
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224 ngx_str_t *addr_port)
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225 {
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226 u_char *host;
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227 ngx_int_t port;
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228 ngx_uint_t p;
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229 struct hostent *h;
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230
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231 for (p = 0; p < addr_port->len; p++) {
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232 if (addr_port->data[p] == ':') {
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233 break;
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234 }
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235 }
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236
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237 in_addr->host.len = p;
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238 if (!(in_addr->host.data = ngx_palloc(pool, p + 1))) {
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239 return NGX_ERROR;
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240 }
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241
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242 ngx_cpystrn(in_addr->host.data, addr_port->data, p + 1);
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243
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244 if (p == addr_port->len) {
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245 p = 0;
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246 }
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247
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248 port = ngx_atoi(&addr[p], args[1].len - p);
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249 if (port == NGX_ERROR && p == 0) {
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250
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251 /* default port */
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252 iap->port = 0;
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253
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254 } else if ((port == NGX_ERROR && p != 0) /* "listen host:NONNUMBER" */
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255 || (port < 1 || port > 65536)) { /* "listen 99999" */
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256
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257 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
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258 "invalid port \"%s\" in \"%s\" directive, "
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259 "it must be a number between 1 and 65535",
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260 &addr[p], cmd->name.data);
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261
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262 return NGX_CONF_ERROR;
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263
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264 } else if (p == 0) {
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265 ls->addr = INADDR_ANY;
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266 ls->port = (in_port_t) port;
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267 return NGX_CONF_OK;
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268 }
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269
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270 return NGX_OK;
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271 }
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272
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273 #endif
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