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290
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 */
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5
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6
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7 #include <ngx_config.h>
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8 #include <ngx_core.h>
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9 #include <ngx_event.h>
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10 #include <ngx_mail.h>
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11
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12
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13 ngx_int_t ngx_pop3_parse_command(ngx_mail_session_t *s)
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14 {
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15 u_char ch, *p, *c, c0, c1, c2, c3;
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16 ngx_str_t *arg;
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17 enum {
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18 sw_start = 0,
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19 sw_spaces_before_argument,
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20 sw_argument,
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21 sw_almost_done
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22 } state;
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23
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24 state = s->state;
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25
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26 for (p = s->buffer->pos; p < s->buffer->last; p++) {
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27 ch = *p;
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28
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29 switch (state) {
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30
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31 /* POP3 command */
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32 case sw_start:
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33 if (ch == ' ' || ch == CR || ch == LF) {
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34 c = s->buffer->start;
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35
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36 if (p - c == 4) {
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37
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38 c0 = ngx_toupper(c[0]);
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39 c1 = ngx_toupper(c[1]);
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40 c2 = ngx_toupper(c[2]);
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41 c3 = ngx_toupper(c[3]);
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42
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43 if (c0 == 'U' && c1 == 'S' && c2 == 'E' && c3 == 'R')
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44 {
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45 s->command = NGX_POP3_USER;
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46
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47 } else if (c0 == 'P' && c1 == 'A' && c2 == 'S' && c3 == 'S')
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48 {
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49 s->command = NGX_POP3_PASS;
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50
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51 } else if (c0 == 'A' && c1 == 'P' && c2 == 'O' && c3 == 'P')
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52 {
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53 s->command = NGX_POP3_APOP;
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54
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55 } else if (c0 == 'Q' && c1 == 'U' && c2 == 'I' && c3 == 'T')
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56 {
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57 s->command = NGX_POP3_QUIT;
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58
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59 } else if (c0 == 'C' && c1 == 'A' && c2 == 'P' && c3 == 'A')
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60 {
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61 s->command = NGX_POP3_CAPA;
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62
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63 } else if (c0 == 'A' && c1 == 'U' && c2 == 'T' && c3 == 'H')
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64 {
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65 s->command = NGX_POP3_AUTH;
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66
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67 } else if (c0 == 'N' && c1 == 'O' && c2 == 'O' && c3 == 'P')
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68 {
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69 s->command = NGX_POP3_NOOP;
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70 #if (NGX_MAIL_SSL)
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71 } else if (c0 == 'S' && c1 == 'T' && c2 == 'L' && c3 == 'S')
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72 {
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73 s->command = NGX_POP3_STLS;
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74 #endif
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75 } else {
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76 goto invalid;
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77 }
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78
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79 } else {
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80 goto invalid;
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81 }
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82
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83 switch (ch) {
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84 case ' ':
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85 state = sw_spaces_before_argument;
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86 break;
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87 case CR:
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88 state = sw_almost_done;
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89 break;
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90 case LF:
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91 goto done;
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92 }
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93 break;
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94 }
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95
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96 if ((ch < 'A' || ch > 'Z') && (ch < 'a' || ch > 'z')) {
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97 goto invalid;
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98 }
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99
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100 break;
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101
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102 case sw_spaces_before_argument:
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103 switch (ch) {
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104 case ' ':
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105 break;
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106 case CR:
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107 state = sw_almost_done;
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108 s->arg_end = p;
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109 break;
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110 case LF:
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111 s->arg_end = p;
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112 goto done;
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113 default:
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114 if (s->args.nelts <= 2) {
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115 state = sw_argument;
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116 s->arg_start = p;
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117 break;
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118 }
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119 goto invalid;
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120 }
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121 break;
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122
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123 case sw_argument:
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124 switch (ch) {
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125
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126 case ' ':
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127
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128 /*
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129 * the space should be considered as part of the at username
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130 * or password, but not of argument in other commands
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131 */
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132
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133 if (s->command == NGX_POP3_USER
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134 || s->command == NGX_POP3_PASS)
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135 {
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136 break;
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137 }
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138
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139 /* fall through */
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140
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141 case CR:
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142 case LF:
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143 arg = ngx_array_push(&s->args);
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144 if (arg == NULL) {
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145 return NGX_ERROR;
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146 }
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147 arg->len = p - s->arg_start;
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148 arg->data = s->arg_start;
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149 s->arg_start = NULL;
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150
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151 switch (ch) {
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152 case ' ':
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153 state = sw_spaces_before_argument;
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154 break;
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155 case CR:
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156 state = sw_almost_done;
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157 break;
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158 case LF:
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159 goto done;
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160 }
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161 break;
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162
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163 default:
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164 break;
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165 }
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166 break;
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167
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168 case sw_almost_done:
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169 switch (ch) {
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170 case LF:
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171 goto done;
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172 default:
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173 goto invalid;
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174 }
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175 }
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176 }
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177
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178 s->buffer->pos = p;
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179 s->state = state;
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180
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181 return NGX_AGAIN;
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182
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183 done:
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184
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185 s->buffer->pos = p + 1;
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186
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187 if (s->arg_start) {
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188 arg = ngx_array_push(&s->args);
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189 if (arg == NULL) {
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190 return NGX_ERROR;
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191 }
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192 arg->len = s->arg_end - s->arg_start;
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193 arg->data = s->arg_start;
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194 s->arg_start = NULL;
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195 }
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196
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197 s->state = (s->command != NGX_POP3_AUTH) ? sw_start : sw_argument;
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198
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199 return NGX_OK;
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200
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201 invalid:
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202
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203 s->state = sw_start;
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204 s->arg_start = NULL;
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205
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206 return NGX_MAIL_PARSE_INVALID_COMMAND;
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207 }
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208
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209
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210 ngx_int_t ngx_imap_parse_command(ngx_mail_session_t *s)
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211 {
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212 u_char ch, *p, *c;
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213 ngx_str_t *arg;
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214 enum {
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215 sw_start = 0,
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216 sw_spaces_before_command,
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217 sw_command,
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218 sw_spaces_before_argument,
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219 sw_argument,
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220 sw_backslash,
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221 sw_literal,
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222 sw_no_sync_literal_argument,
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223 sw_start_literal_argument,
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224 sw_literal_argument,
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225 sw_end_literal_argument,
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226 sw_almost_done
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227 } state;
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228
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229 state = s->state;
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230
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231 for (p = s->buffer->pos; p < s->buffer->last; p++) {
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232 ch = *p;
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233
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234 switch (state) {
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235
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236 /* IMAP tag */
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237 case sw_start:
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238 switch (ch) {
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239 case ' ':
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240 s->tag.len = p - s->buffer->start + 1;
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241 s->tag.data = s->buffer->start;
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242 state = sw_spaces_before_command;
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243 break;
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244 case CR:
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245 s->state = sw_start;
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246 return NGX_MAIL_PARSE_INVALID_COMMAND;
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247 case LF:
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248 s->state = sw_start;
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249 return NGX_MAIL_PARSE_INVALID_COMMAND;
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250 }
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251 break;
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252
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253 case sw_spaces_before_command:
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254 switch (ch) {
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255 case ' ':
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256 break;
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257 case CR:
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258 s->state = sw_start;
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259 return NGX_MAIL_PARSE_INVALID_COMMAND;
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260 case LF:
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261 s->state = sw_start;
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262 return NGX_MAIL_PARSE_INVALID_COMMAND;
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263 default:
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264 s->cmd_start = p;
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265 state = sw_command;
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266 break;
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267 }
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268 break;
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269
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270 case sw_command:
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271 if (ch == ' ' || ch == CR || ch == LF) {
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272
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273 c = s->cmd_start;
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274
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275 switch (p - c) {
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276
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277 case 4:
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278 if ((c[0] == 'N' || c[0] == 'n')
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279 && (c[1] == 'O'|| c[1] == 'o')
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280 && (c[2] == 'O'|| c[2] == 'o')
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281 && (c[3] == 'P'|| c[3] == 'p'))
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282 {
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283 s->command = NGX_IMAP_NOOP;
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284
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285 } else {
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286 goto invalid;
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287 }
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288 break;
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289
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290 case 5:
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291 if ((c[0] == 'L'|| c[0] == 'l')
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292 && (c[1] == 'O'|| c[1] == 'o')
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293 && (c[2] == 'G'|| c[2] == 'g')
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294 && (c[3] == 'I'|| c[3] == 'i')
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295 && (c[4] == 'N'|| c[4] == 'n'))
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296 {
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297 s->command = NGX_IMAP_LOGIN;
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298
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299 } else {
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300 goto invalid;
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301 }
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302 break;
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303
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304 case 6:
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305 if ((c[0] == 'L'|| c[0] == 'l')
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306 && (c[1] == 'O'|| c[1] == 'o')
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307 && (c[2] == 'G'|| c[2] == 'g')
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308 && (c[3] == 'O'|| c[3] == 'o')
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309 && (c[4] == 'U'|| c[4] == 'u')
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310 && (c[5] == 'T'|| c[5] == 't'))
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311 {
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312 s->command = NGX_IMAP_LOGOUT;
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313
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314 } else {
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315 goto invalid;
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316 }
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317 break;
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318
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319 #if (NGX_MAIL_SSL)
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320 case 8:
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321 if ((c[0] == 'S'|| c[0] == 's')
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322 && (c[1] == 'T'|| c[1] == 't')
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323 && (c[2] == 'A'|| c[2] == 'a')
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324 && (c[3] == 'R'|| c[3] == 'r')
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325 && (c[4] == 'T'|| c[4] == 't')
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326 && (c[5] == 'T'|| c[5] == 't')
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327 && (c[6] == 'L'|| c[6] == 'l')
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328 && (c[7] == 'S'|| c[7] == 's'))
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329 {
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330 s->command = NGX_IMAP_STARTTLS;
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331
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332 } else {
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333 goto invalid;
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334 }
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335 break;
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336 #endif
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337
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338 case 10:
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339 if ((c[0] == 'C'|| c[0] == 'c')
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340 && (c[1] == 'A'|| c[1] == 'a')
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341 && (c[2] == 'P'|| c[2] == 'p')
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342 && (c[3] == 'A'|| c[3] == 'a')
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343 && (c[4] == 'B'|| c[4] == 'b')
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344 && (c[5] == 'I'|| c[5] == 'i')
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345 && (c[6] == 'L'|| c[6] == 'l')
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346 && (c[7] == 'I'|| c[7] == 'i')
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347 && (c[8] == 'T'|| c[8] == 't')
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348 && (c[9] == 'Y'|| c[9] == 'y'))
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349 {
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350 s->command = NGX_IMAP_CAPABILITY;
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351
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352 } else {
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353 goto invalid;
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354 }
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355 break;
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356
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322
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357 case 12:
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358 if ((c[0] == 'A'|| c[0] == 'a')
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359 && (c[1] == 'U'|| c[1] == 'u')
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360 && (c[2] == 'T'|| c[2] == 't')
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361 && (c[3] == 'H'|| c[3] == 'h')
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362 && (c[4] == 'E'|| c[4] == 'e')
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363 && (c[5] == 'N'|| c[5] == 'n')
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364 && (c[6] == 'T'|| c[6] == 't')
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365 && (c[7] == 'I'|| c[7] == 'i')
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366 && (c[8] == 'C'|| c[8] == 'c')
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367 && (c[9] == 'A'|| c[9] == 'a')
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368 && (c[10] == 'T'|| c[10] == 't')
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369 && (c[11] == 'E'|| c[11] == 'e'))
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370 {
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371 s->command = NGX_IMAP_AUTHENTICATE;
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372
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373 } else {
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374 goto invalid;
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375 }
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376 break;
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377
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290
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378 default:
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379 goto invalid;
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380 }
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381
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382 switch (ch) {
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383 case ' ':
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384 state = sw_spaces_before_argument;
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385 break;
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386 case CR:
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387 state = sw_almost_done;
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388 break;
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389 case LF:
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390 goto done;
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391 }
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392 break;
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393 }
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394
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395 if ((ch < 'A' || ch > 'Z') && (ch < 'a' || ch > 'z')) {
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396 goto invalid;
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397 }
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398
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399 break;
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400
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401 case sw_spaces_before_argument:
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402 switch (ch) {
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403 case ' ':
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404 break;
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405 case CR:
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406 state = sw_almost_done;
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407 s->arg_end = p;
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408 break;
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409 case LF:
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410 s->arg_end = p;
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411 goto done;
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412 case '"':
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413 if (s->args.nelts <= 2) {
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414 s->quoted = 1;
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415 s->arg_start = p + 1;
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416 state = sw_argument;
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417 break;
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418 }
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419 goto invalid;
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420 case '{':
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421 if (s->args.nelts <= 2) {
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422 state = sw_literal;
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423 break;
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424 }
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425 goto invalid;
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426 default:
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427 if (s->args.nelts <= 2) {
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428 s->arg_start = p;
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429 state = sw_argument;
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430 break;
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431 }
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432 goto invalid;
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433 }
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434 break;
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435
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436 case sw_argument:
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328
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437 if (ch == ' ' && s->quoted) {
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438 break;
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|
|
439 }
|
|
|
440
|
|
290
|
441 switch (ch) {
|
|
|
442 case '"':
|
|
|
443 if (!s->quoted) {
|
|
|
444 break;
|
|
|
445 }
|
|
|
446 s->quoted = 0;
|
|
|
447 /* fall through */
|
|
|
448 case ' ':
|
|
|
449 case CR:
|
|
|
450 case LF:
|
|
|
451 arg = ngx_array_push(&s->args);
|
|
|
452 if (arg == NULL) {
|
|
|
453 return NGX_ERROR;
|
|
|
454 }
|
|
|
455 arg->len = p - s->arg_start;
|
|
|
456 arg->data = s->arg_start;
|
|
|
457 s->arg_start = NULL;
|
|
|
458
|
|
|
459 switch (ch) {
|
|
|
460 case '"':
|
|
|
461 case ' ':
|
|
|
462 state = sw_spaces_before_argument;
|
|
|
463 break;
|
|
|
464 case CR:
|
|
|
465 state = sw_almost_done;
|
|
|
466 break;
|
|
|
467 case LF:
|
|
|
468 goto done;
|
|
|
469 }
|
|
|
470 break;
|
|
|
471 case '\\':
|
|
|
472 if (s->quoted) {
|
|
|
473 s->backslash = 1;
|
|
|
474 state = sw_backslash;
|
|
|
475 }
|
|
|
476 break;
|
|
|
477 }
|
|
|
478 break;
|
|
|
479
|
|
|
480 case sw_backslash:
|
|
|
481 switch (ch) {
|
|
|
482 case CR:
|
|
|
483 case LF:
|
|
|
484 goto invalid;
|
|
|
485 default:
|
|
|
486 state = sw_argument;
|
|
|
487 }
|
|
|
488 break;
|
|
|
489
|
|
|
490 case sw_literal:
|
|
|
491 if (ch >= '0' && ch <= '9') {
|
|
|
492 s->literal_len = s->literal_len * 10 + (ch - '0');
|
|
|
493 break;
|
|
|
494 }
|
|
|
495 if (ch == '}') {
|
|
|
496 state = sw_start_literal_argument;
|
|
|
497 break;
|
|
|
498 }
|
|
|
499 if (ch == '+') {
|
|
|
500 state = sw_no_sync_literal_argument;
|
|
|
501 break;
|
|
|
502 }
|
|
|
503 goto invalid;
|
|
|
504
|
|
|
505 case sw_no_sync_literal_argument:
|
|
|
506 if (ch == '}') {
|
|
|
507 s->no_sync_literal = 1;
|
|
|
508 state = sw_start_literal_argument;
|
|
|
509 break;
|
|
|
510 }
|
|
|
511 goto invalid;
|
|
|
512
|
|
|
513 case sw_start_literal_argument:
|
|
|
514 switch (ch) {
|
|
|
515 case CR:
|
|
|
516 break;
|
|
|
517 case LF:
|
|
|
518 s->buffer->pos = p + 1;
|
|
|
519 s->arg_start = p + 1;
|
|
|
520 if (s->no_sync_literal == 0) {
|
|
|
521 s->state = sw_literal_argument;
|
|
|
522 return NGX_IMAP_NEXT;
|
|
|
523 }
|
|
|
524 state = sw_literal_argument;
|
|
|
525 s->no_sync_literal = 0;
|
|
|
526 break;
|
|
|
527 default:
|
|
|
528 goto invalid;
|
|
|
529 }
|
|
|
530 break;
|
|
|
531
|
|
|
532 case sw_literal_argument:
|
|
|
533 if (s->literal_len && --s->literal_len) {
|
|
|
534 break;
|
|
|
535 }
|
|
|
536
|
|
|
537 arg = ngx_array_push(&s->args);
|
|
|
538 if (arg == NULL) {
|
|
|
539 return NGX_ERROR;
|
|
|
540 }
|
|
|
541 arg->len = p + 1 - s->arg_start;
|
|
|
542 arg->data = s->arg_start;
|
|
|
543 s->arg_start = NULL;
|
|
|
544 state = sw_end_literal_argument;
|
|
|
545
|
|
|
546 break;
|
|
|
547
|
|
|
548 case sw_end_literal_argument:
|
|
|
549 switch (ch) {
|
|
|
550 case '{':
|
|
|
551 if (s->args.nelts <= 2) {
|
|
|
552 state = sw_literal;
|
|
|
553 break;
|
|
|
554 }
|
|
|
555 goto invalid;
|
|
|
556 case CR:
|
|
|
557 state = sw_almost_done;
|
|
|
558 break;
|
|
|
559 case LF:
|
|
|
560 goto done;
|
|
|
561 default:
|
|
|
562 state = sw_spaces_before_argument;
|
|
|
563 break;
|
|
|
564 }
|
|
|
565 break;
|
|
|
566
|
|
|
567 case sw_almost_done:
|
|
|
568 switch (ch) {
|
|
|
569 case LF:
|
|
|
570 goto done;
|
|
|
571 default:
|
|
|
572 goto invalid;
|
|
|
573 }
|
|
|
574 }
|
|
|
575 }
|
|
|
576
|
|
|
577 s->buffer->pos = p;
|
|
|
578 s->state = state;
|
|
|
579
|
|
|
580 return NGX_AGAIN;
|
|
|
581
|
|
|
582 done:
|
|
|
583
|
|
|
584 s->buffer->pos = p + 1;
|
|
|
585
|
|
|
586 if (s->arg_start) {
|
|
|
587 arg = ngx_array_push(&s->args);
|
|
|
588 if (arg == NULL) {
|
|
|
589 return NGX_ERROR;
|
|
|
590 }
|
|
|
591 arg->len = s->arg_end - s->arg_start;
|
|
|
592 arg->data = s->arg_start;
|
|
|
593
|
|
|
594 s->arg_start = NULL;
|
|
|
595 s->cmd_start = NULL;
|
|
|
596 s->quoted = 0;
|
|
|
597 s->no_sync_literal = 0;
|
|
|
598 s->literal_len = 0;
|
|
|
599 }
|
|
|
600
|
|
322
|
601 s->state = (s->command != NGX_IMAP_AUTHENTICATE) ? sw_start : sw_argument;
|
|
290
|
602
|
|
|
603 return NGX_OK;
|
|
|
604
|
|
|
605 invalid:
|
|
|
606
|
|
|
607 s->state = sw_start;
|
|
|
608 s->quoted = 0;
|
|
|
609 s->no_sync_literal = 0;
|
|
|
610 s->literal_len = 0;
|
|
|
611
|
|
|
612 return NGX_MAIL_PARSE_INVALID_COMMAND;
|
|
|
613 }
|
|
|
614
|
|
|
615
|
|
|
616 ngx_int_t ngx_smtp_parse_command(ngx_mail_session_t *s)
|
|
|
617 {
|
|
|
618 u_char ch, *p, *c, c0, c1, c2, c3;
|
|
|
619 ngx_str_t *arg;
|
|
|
620 enum {
|
|
|
621 sw_start = 0,
|
|
|
622 sw_spaces_before_argument,
|
|
|
623 sw_argument,
|
|
|
624 sw_almost_done
|
|
|
625 } state;
|
|
|
626
|
|
|
627 state = s->state;
|
|
|
628
|
|
|
629 for (p = s->buffer->pos; p < s->buffer->last; p++) {
|
|
|
630 ch = *p;
|
|
|
631
|
|
|
632 switch (state) {
|
|
|
633
|
|
|
634 /* SMTP command */
|
|
|
635 case sw_start:
|
|
|
636 if (ch == ' ' || ch == CR || ch == LF) {
|
|
|
637 c = s->buffer->start;
|
|
|
638
|
|
|
639 if (p - c == 4) {
|
|
|
640
|
|
|
641 c0 = ngx_toupper(c[0]);
|
|
|
642 c1 = ngx_toupper(c[1]);
|
|
|
643 c2 = ngx_toupper(c[2]);
|
|
|
644 c3 = ngx_toupper(c[3]);
|
|
|
645
|
|
|
646 if (c0 == 'H' && c1 == 'E' && c2 == 'L' && c3 == 'O')
|
|
|
647 {
|
|
|
648 s->command = NGX_SMTP_HELO;
|
|
|
649
|
|
|
650 } else if (c0 == 'E' && c1 == 'H' && c2 == 'L' && c3 == 'O')
|
|
|
651 {
|
|
|
652 s->command = NGX_SMTP_EHLO;
|
|
|
653
|
|
|
654 } else if (c0 == 'Q' && c1 == 'U' && c2 == 'I' && c3 == 'T')
|
|
|
655 {
|
|
|
656 s->command = NGX_SMTP_QUIT;
|
|
|
657
|
|
|
658 } else if (c0 == 'A' && c1 == 'U' && c2 == 'T' && c3 == 'H')
|
|
|
659 {
|
|
|
660 s->command = NGX_SMTP_AUTH;
|
|
|
661
|
|
|
662 } else if (c0 == 'N' && c1 == 'O' && c2 == 'O' && c3 == 'P')
|
|
|
663 {
|
|
|
664 s->command = NGX_SMTP_NOOP;
|
|
|
665
|
|
|
666 } else if (c0 == 'M' && c1 == 'A' && c2 == 'I' && c3 == 'L')
|
|
|
667 {
|
|
|
668 s->command = NGX_SMTP_MAIL;
|
|
|
669
|
|
|
670 } else if (c0 == 'R' && c1 == 'S' && c2 == 'E' && c3 == 'T')
|
|
|
671 {
|
|
|
672 s->command = NGX_SMTP_RSET;
|
|
|
673
|
|
322
|
674 } else if (c0 == 'R' && c1 == 'C' && c2 == 'P' && c3 == 'T')
|
|
|
675 {
|
|
|
676 s->command = NGX_SMTP_RCPT;
|
|
|
677
|
|
|
678 } else if (c0 == 'V' && c1 == 'R' && c2 == 'F' && c3 == 'Y')
|
|
|
679 {
|
|
|
680 s->command = NGX_SMTP_VRFY;
|
|
|
681
|
|
|
682 } else if (c0 == 'E' && c1 == 'X' && c2 == 'P' && c3 == 'N')
|
|
|
683 {
|
|
|
684 s->command = NGX_SMTP_EXPN;
|
|
|
685
|
|
|
686 } else if (c0 == 'H' && c1 == 'E' && c2 == 'L' && c3 == 'P')
|
|
|
687 {
|
|
|
688 s->command = NGX_SMTP_HELP;
|
|
|
689
|
|
290
|
690 } else {
|
|
|
691 goto invalid;
|
|
|
692 }
|
|
322
|
693 #if (NGX_MAIL_SSL)
|
|
|
694 } else if (p - c == 8) {
|
|
290
|
695
|
|
322
|
696 if ((c[0] == 'S'|| c[0] == 's')
|
|
|
697 && (c[1] == 'T'|| c[1] == 't')
|
|
|
698 && (c[2] == 'A'|| c[2] == 'a')
|
|
|
699 && (c[3] == 'R'|| c[3] == 'r')
|
|
|
700 && (c[4] == 'T'|| c[4] == 't')
|
|
|
701 && (c[5] == 'T'|| c[5] == 't')
|
|
|
702 && (c[6] == 'L'|| c[6] == 'l')
|
|
|
703 && (c[7] == 'S'|| c[7] == 's'))
|
|
|
704 {
|
|
|
705 s->command = NGX_SMTP_STARTTLS;
|
|
|
706
|
|
|
707 } else {
|
|
|
708 goto invalid;
|
|
|
709 }
|
|
|
710 #endif
|
|
290
|
711 } else {
|
|
|
712 goto invalid;
|
|
|
713 }
|
|
|
714
|
|
|
715 switch (ch) {
|
|
|
716 case ' ':
|
|
|
717 state = sw_spaces_before_argument;
|
|
|
718 break;
|
|
|
719 case CR:
|
|
|
720 state = sw_almost_done;
|
|
|
721 break;
|
|
|
722 case LF:
|
|
|
723 goto done;
|
|
|
724 }
|
|
|
725 break;
|
|
|
726 }
|
|
|
727
|
|
|
728 if ((ch < 'A' || ch > 'Z') && (ch < 'a' || ch > 'z')) {
|
|
|
729 goto invalid;
|
|
|
730 }
|
|
|
731
|
|
|
732 break;
|
|
|
733
|
|
|
734 case sw_spaces_before_argument:
|
|
|
735 switch (ch) {
|
|
|
736 case ' ':
|
|
|
737 break;
|
|
|
738 case CR:
|
|
|
739 state = sw_almost_done;
|
|
|
740 s->arg_end = p;
|
|
|
741 break;
|
|
|
742 case LF:
|
|
|
743 s->arg_end = p;
|
|
|
744 goto done;
|
|
|
745 default:
|
|
|
746 if (s->args.nelts <= 2) {
|
|
|
747 state = sw_argument;
|
|
|
748 s->arg_start = p;
|
|
|
749 break;
|
|
|
750 }
|
|
|
751 goto invalid;
|
|
|
752 }
|
|
|
753 break;
|
|
|
754
|
|
|
755 case sw_argument:
|
|
|
756 switch (ch) {
|
|
|
757 case ' ':
|
|
|
758 case CR:
|
|
|
759 case LF:
|
|
|
760 arg = ngx_array_push(&s->args);
|
|
|
761 if (arg == NULL) {
|
|
|
762 return NGX_ERROR;
|
|
|
763 }
|
|
|
764 arg->len = p - s->arg_start;
|
|
|
765 arg->data = s->arg_start;
|
|
|
766 s->arg_start = NULL;
|
|
|
767
|
|
|
768 switch (ch) {
|
|
|
769 case ' ':
|
|
|
770 state = sw_spaces_before_argument;
|
|
|
771 break;
|
|
|
772 case CR:
|
|
|
773 state = sw_almost_done;
|
|
|
774 break;
|
|
|
775 case LF:
|
|
|
776 goto done;
|
|
|
777 }
|
|
|
778 break;
|
|
|
779
|
|
|
780 default:
|
|
|
781 break;
|
|
|
782 }
|
|
|
783 break;
|
|
|
784
|
|
|
785 case sw_almost_done:
|
|
|
786 switch (ch) {
|
|
|
787 case LF:
|
|
|
788 goto done;
|
|
|
789 default:
|
|
|
790 goto invalid;
|
|
|
791 }
|
|
|
792 }
|
|
|
793 }
|
|
|
794
|
|
|
795 s->buffer->pos = p;
|
|
|
796 s->state = state;
|
|
|
797
|
|
|
798 return NGX_AGAIN;
|
|
|
799
|
|
|
800 done:
|
|
|
801
|
|
|
802 s->buffer->pos = p + 1;
|
|
|
803
|
|
|
804 if (s->arg_start) {
|
|
|
805 arg = ngx_array_push(&s->args);
|
|
|
806 if (arg == NULL) {
|
|
|
807 return NGX_ERROR;
|
|
|
808 }
|
|
|
809 arg->len = s->arg_end - s->arg_start;
|
|
|
810 arg->data = s->arg_start;
|
|
|
811 s->arg_start = NULL;
|
|
|
812 }
|
|
|
813
|
|
|
814 s->state = (s->command != NGX_SMTP_AUTH) ? sw_start : sw_argument;
|
|
|
815
|
|
|
816 return NGX_OK;
|
|
|
817
|
|
|
818 invalid:
|
|
|
819
|
|
|
820 s->state = sw_start;
|
|
|
821 s->arg_start = NULL;
|
|
|
822
|
|
|
823 return NGX_MAIL_PARSE_INVALID_COMMAND;
|
|
|
824 }
|
