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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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10
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12 /*
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13 * ngx_sock_ntop() and ngx_inet_ntop() may be implemented as
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14 * "ngx_sprintf(text, "%ud.%ud.%ud.%ud", p[0], p[1], p[2], p[3])",
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15 * however, they were implemented long before the ngx_sprintf() appeared
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16 * and they are faster by 1.5-2.5 times, so it is worth to keep them.
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17 *
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18 * By the way, the implementation using ngx_sprintf() is faster by 2.5-3 times
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19 * than using FreeBSD libc's snrpintf().
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20 */
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21
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22
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16
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23 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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24 {
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25 size_t n;
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26 ngx_uint_t c1, c2;
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27
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28 n = 0;
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29
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30 if (len == n) {
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31 return n;
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32 }
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33
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34 c1 = c / 100;
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35
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36 if (c1) {
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37 *text++ = (u_char) (c1 + '0');
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38 n++;
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39
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40 if (len == n) {
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41 return n;
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42 }
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43 }
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44
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45 c2 = (c % 100) / 10;
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46
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47 if (c1 || c2) {
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48 *text++ = (u_char) (c2 + '0');
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49 n++;
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50
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51 if (len == n) {
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52 return n;
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53 }
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54 }
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55
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56 c2 = c % 10;
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57
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58 *text++ = (u_char) (c2 + '0');
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59 n++;
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60
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61 return n;
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62 }
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63
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64
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65 /* AF_INET only */
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66
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67 size_t ngx_sock_ntop(int family, struct sockaddr *addr, u_char *text,
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68 size_t len)
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69 {
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70 u_char *p;
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71 size_t n;
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72 ngx_uint_t i;
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73 struct sockaddr_in *addr_in;
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74
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75 if (len == 0) {
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76 return 0;
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77 }
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78
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79 if (family != AF_INET) {
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80 return 0;
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81 }
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82
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83 addr_in = (struct sockaddr_in *) addr;
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84 p = (u_char *) &addr_in->sin_addr;
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85
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86 if (len > INET_ADDRSTRLEN) {
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87 len = INET_ADDRSTRLEN;
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88 }
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89
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90 n = ngx_sprint_uchar(text, p[0], len);
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91
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92 i = 1;
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93
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94 do {
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95 if (len == n) {
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96 text[n - 1] = '\0';
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97 return n;
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98 }
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99
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100 text[n++] = '.';
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101
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102 if (len == n) {
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103 text[n - 1] = '\0';
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104 return n;
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105 }
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106
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107 n += ngx_sprint_uchar(&text[n], p[i++], len - n);
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108
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109 } while (i < 4);
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110
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111 if (len == n) {
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112 text[n] = '\0';
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113 return n;
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114 }
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115
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116 text[n] = '\0';
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117
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118 return n;
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119 }
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120
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121 size_t ngx_inet_ntop(int family, void *addr, u_char *text, size_t len)
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122 {
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123 u_char *p;
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124 size_t n;
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125 ngx_uint_t i;
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126
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127 if (len == 0) {
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128 return 0;
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129 }
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130
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131 if (family != AF_INET) {
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132 return 0;
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133 }
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134
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135 p = (u_char *) addr;
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136
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137 if (len > INET_ADDRSTRLEN) {
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138 len = INET_ADDRSTRLEN;
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139 }
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140
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141 n = ngx_sprint_uchar(text, p[0], len);
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142
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143 i = 1;
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144
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145 do {
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146 if (len == n) {
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147 text[n - 1] = '\0';
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148 return n;
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149 }
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150
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151 text[n++] = '.';
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152
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153 if (len == n) {
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154 text[n - 1] = '\0';
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155 return n;
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156 }
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157
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158 n += ngx_sprint_uchar(&text[n], p[i++], len - n);
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159
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160 } while (i < 4);
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161
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162 if (len == n) {
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163 text[n] = '\0';
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164 return n;
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165 }
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166
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167 text[n] = '\0';
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168
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169 return n;
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170 }
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171
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172
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173 /* AF_INET only */
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174
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175 ngx_int_t ngx_ptocidr(ngx_str_t *text, void *cidr)
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176 {
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177 ngx_int_t m;
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178 ngx_uint_t i;
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179 ngx_inet_cidr_t *in_cidr;
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180
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181 in_cidr = cidr;
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182
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183 for (i = 0; i < text->len; i++) {
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184 if (text->data[i] == '/') {
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185 break;
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186 }
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187 }
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188
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189 if (i == text->len) {
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190 return NGX_ERROR;
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191 }
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192
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193 text->data[i] = '\0';
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194 in_cidr->addr = inet_addr((char *) text->data);
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195 text->data[i] = '/';
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196 if (in_cidr->addr == INADDR_NONE) {
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197 return NGX_ERROR;
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198 }
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199
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200 m = ngx_atoi(&text->data[i + 1], text->len - (i + 1));
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201 if (m == NGX_ERROR) {
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202 return NGX_ERROR;
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203 }
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204
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205 if (m == 0) {
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206
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207 /* the x86 compilers use the shl instruction that shifts by modulo 32 */
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208
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209 in_cidr->mask = 0;
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210 return NGX_OK;
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211 }
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212
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213 in_cidr->mask = htonl((ngx_uint_t) (0 - (1 << (32 - m))));
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214
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215 return NGX_OK;
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216 }
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217
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218
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219 #if 0
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220
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221 ngx_int_t ngx_inet_addr_port(ngx_conf_t *cf, ngx_command_t *cmd,
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222 ngx_str_t *addr_port)
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223 {
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224 u_char *host;
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225 ngx_int_t port;
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226 ngx_uint_t p;
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227 struct hostent *h;
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228
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229 for (p = 0; p < addr_port->len; p++) {
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230 if (addr_port->data[p] == ':') {
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231 break;
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232 }
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233 }
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234
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235 in_addr->host.len = p;
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236 if (!(in_addr->host.data = ngx_palloc(pool, p + 1))) {
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237 return NGX_ERROR;
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238 }
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239
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240 ngx_cpystrn(in_addr->host.data, addr_port->data, p + 1);
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241
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242 if (p == addr_port->len) {
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243 p = 0;
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244 }
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245
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246 port = ngx_atoi(&addr[p], args[1].len - p);
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247 if (port == NGX_ERROR && p == 0) {
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248
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249 /* default port */
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250 iap->port = 0;
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251
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252 } else if ((port == NGX_ERROR && p != 0) /* "listen host:NONNUMBER" */
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253 || (port < 1 || port > 65536)) { /* "listen 99999" */
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254
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255 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
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256 "invalid port \"%s\" in \"%s\" directive, "
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257 "it must be a number between 1 and 65535",
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258 &addr[p], cmd->name.data);
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259
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260 return NGX_CONF_ERROR;
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261
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262 } else if (p == 0) {
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263 ls->addr = INADDR_ANY;
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264 ls->port = (in_port_t) port;
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265 return NGX_CONF_OK;
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266 }
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267
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268 return NGX_OK;
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269 }
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270
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271 #endif
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