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#include <ctype.h>
#include <limits.h>
#include <string.h>
#include "systime.h"
#include "misc.h"
#include "vpwentry.h"
static const char* from_uint(const char* ptr, unsigned* u)
{
const char* tmp;
if (ptr[0] == '-' && ptr[1] == 0) {
*u = UINT_MAX;
return ptr + 2;
}
*u = strtou(ptr, &tmp);
return (*tmp == 0) ? ++tmp : 0;
}
static const char* import_flags(vpwentry* vpw,
const char* ptr, const char* end)
{
while (ptr < end) {
unsigned flag;
unsigned value;
if ((flag = *(unsigned char*)ptr++) == 0) return ptr;
if (ptr >= end) return 0;
value = *(unsigned char*)ptr++;
switch(flag) {
case VPWENTRY_HAS_MAILBOX:
vpw->has_mailbox = value; break;
case VPWENTRY_MAILBOX_ENABLED:
vpw->is_mailbox_enabled = value; break;
default:
return 0;
}
}
return 0;
}
static const char* import_base(vpwentry* vpw, const char* ptr, const char* end)
{
const char* start;
str_copys(&vpw->pass, ptr);
ptr += vpw->pass.len + 1;
if (ptr >= end) return 0;
str_copys(&vpw->directory, ptr);
vpw->has_mailbox = (vpw->directory.len != 0);
ptr += vpw->directory.len + 1;
if (ptr >= end) return 0;
start = ptr;
while (ptr < end && *ptr != 0)
ptr += strlen(ptr) + 1;
if (ptr == start)
str_truncate(&vpw->forwards, 0);
else
str_copyb(&vpw->forwards, start, ptr-start-1);
if (ptr++ >= end) return 0;
str_copys(&vpw->personal, ptr);
ptr += vpw->personal.len + 1;
if (ptr >= end) return 0;
return ptr;
}
static const char* import_values(vpwentry* vpw,
const char* ptr, const char* end)
{
if ((ptr = from_uint(ptr, &vpw->hardquota)) == 0 || ptr >= end) return 0;
if ((ptr = from_uint(ptr, &vpw->softquota)) == 0 || ptr >= end) return 0;
if ((ptr = from_uint(ptr, &vpw->msgsize)) == 0 || ptr >= end) return 0;
if ((ptr = from_uint(ptr, &vpw->msgcount)) == 0 || ptr >= end) return 0;
if ((ptr = from_uint(ptr, &vpw->ctime)) == 0 || ptr >= end) return 0;
if ((ptr = from_uint(ptr, &vpw->expiry)) == 0 || ptr > end) return 0;
return ptr;
}
static void set_defaults(vpwentry* vpw, int ctime_now, int set_flags)
{
/* FIXME: These need to be loaded from config files */
vpw->softquota = vpw->hardquota = vpw->msgsize = vpw->msgcount = 0;
vpw->expiry = UINT_MAX;
if (ctime_now)
vpw->ctime = time(0);
else
vpw->ctime = 0;
if(set_flags) {
vpw->is_mailbox_enabled = 1;
}
}
static int import_old(vpwentry* vpw, const str* data)
{
const char* end;
if ((end = strchr(data->s+1, ':')) == 0) return 0;
str_copyb(&vpw->pass, data->s+1, end-data->s-1);
++end;
if(*end == '.' || *end == '/') {
vpw->has_mailbox = 1;
str_copys(&vpw->directory, end);
str_truncate(&vpw->forwards, 0);
}
else {
if(*end == '&')
++end;
vpw->has_mailbox = 0;
str_truncate(&vpw->directory, 0);
str_copys(&vpw->forwards, end);
str_subst(&vpw->forwards, ',', 0);
}
set_defaults(vpw, 0, 1);
return 1;
}
static int import_ver1(vpwentry* vpw, const str* data)
{
const char* ptr;
const char* end;
// Sanity check to ensure that text conversions can't
// fall off the end of the string.
if (data->s[data->len-1] != 0) return 0;
ptr = data->s;
end = ptr++ + data->len;
if ((ptr = import_base(vpw, ptr, end)) == 0) return 0;
if ((ptr = import_values(vpw, ptr, end)) == 0) return 0;
// Set defaults
vpw->is_mailbox_enabled = 1;
return ptr == end;
}
static int import_ver2(vpwentry* vpw, const str* data)
{
const char* ptr;
const char* end;
// Sanity check to ensure that text conversions can't
// fall off the end of the string.
if (data->s[data->len-1] != 0) return 0;
ptr = data->s;
end = ptr++ + data->len;
if((ptr = import_flags(vpw, ptr, end)) == 0) return 0;
if((ptr = import_base(vpw, ptr, end)) == 0) return 0;
if((ptr = import_values(vpw, ptr, end)) == 0) return 0;
return ptr == end;
}
int vpwentry_import(vpwentry* vpw, const str* name, const str* data)
{
str_copy(&vpw->name, name);
switch (data->s[0]) {
case 2: return import_ver2(vpw, data);
case 1: return import_ver1(vpw, data);
case ':': return import_old(vpw, data);
default: return 0;
}
}
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