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#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_event.h>
#include <ngx_imap.h>
ngx_int_t ngx_pop3_parse_command(ngx_imap_request_t *r)
{
u_char ch, *p, *c;
enum {
sw_start = 0,
sw_done
} state;
while (p < r->buf->last && state < sw_done) {
ch = *p++;
switch (state) {
/* POP3 commands */
case sw_start:
if (ch == ' ') {
c = r->buf->start;
if (p - 1 - m == 4) {
if (*c == 'U' && *(c + 1) == 'S'
&& *(c + 2) == 'E' && *(c + 3) == 'R')
{
r->command = NGX_POP3_USER;
} else if (*c == 'P' && *(c + 1) == 'A'
&& *(c + 2) == 'A' && *(c + 3) == 'S')
{
r->method = NGX_POP3_PASS;
} else if (*c == 'Q' && *(c + 1) == 'U'
&& *(c + 2) == 'I' && *(c + 3) == 'T')
{
r->method = NGX_POP3_QUIT;
} else if (*c == 'N' && *(c + 1) == 'O'
&& *(c + 2) == 'O' && *(c + 3) == 'P')
{
r->method = NGX_POP3_NOOP;
}
}
state = sw_spaces_before_arg;
break;
}
if (ch < 'A' || ch > 'Z') {
return NGX_IMAP_PARSE_INVALID_COMMAND;
}
break;
}
/* suppress warning */
case sw_done:
break;
}
}
return NGX_OK;
}
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