/*
* parse a buffer.
*
* NOTE: parse() should not be called recusively by any other functions!
*/
int parse(aClient *cptr, char *pbuffer, char *bufend)
{
aClient *from = cptr;
char *ch;
char *s;
size_t i;
char* numeric = 0;
unsigned int paramcount;
struct Message *mptr;
Debug((DEBUG_DEBUG, "Parsing %s: %s",
get_client_name(cptr, TRUE), pbuffer));
if (IsDead(cptr))
return -1;
s = sender;
*s = '\0';
for (ch = pbuffer; *ch == ' '; ch++) /* skip spaces */
/* null statement */ ;
para[0] = from->name;
if (*ch == ':')
{
ch++;
/*
** Copy the prefix to 'sender' assuming it terminates
** with SPACE (or NULL, which is an error, though).
*/
for (i = 0; *ch && *ch != ' '; i++ )
{
if (i < (sizeof(sender)-1))
*s++ = *ch; /* leave room for NULL */
ch++;
}
*s = '\0';
i = 0;
/*
** Actually, only messages coming from servers can have
** the prefix--prefix silently ignored, if coming from
** a user client...
**
** ...sigh, the current release "v2.2PL1" generates also
** null prefixes, at least to NOTIFY messages (e.g. it
** puts "sptr->nickname" as prefix from server structures
** where it's null--the following will handle this case
** as "no prefix" at all --msa (": NOTICE nick ...")
*/
if (*sender && IsServer(cptr))
{
from = find_client(sender, (aClient *) NULL);
if (!from || !match(from->name, sender))
from = find_server(sender);
para[0] = sender;
/* Hmm! If the client corresponding to the
* prefix is not found--what is the correct
* action??? Now, I will ignore the message
* (old IRC just let it through as if the
* prefix just wasn't there...) --msa
*/
if (!from)
{
sendto_ops_flag_butone(cptr, UMODE_DEBUG, "Unknown prefix (%s) from (%s)",
sender, cptr->name);
Debug((DEBUG_ERROR, "Unknown prefix (%s)(%s) from (%s)",
sender, pbuffer, cptr->name));
ServerStats->is_unpf++;
remove_unknown(cptr, sender, pbuffer);
return -1;
}
if (from->from != cptr)
{
ServerStats->is_wrdi++;
Debug((DEBUG_ERROR, "Message (%s) coming from (%s)",
buffer, cptr->name));
sendto_ops_flag_butone(cptr, UMODE_DEBUG, "Message coming from (%s), but %s is at %s",
cptr->name, from->name, from->from->name);
return cancel_clients(cptr, from, pbuffer);
}
}
while (*ch == ' ')
ch++;
}
if (*ch == '\0')
{
ServerStats->is_empt++;
Debug((DEBUG_NOTICE, "Empty message from host %s:%s",
cptr->name, from->name));
if (IsServer(cptr))
sendto_ops_flag_butone(cptr, UMODE_DEBUG, "Empty message from %s:%s",
cptr->name, from->name);
return(-1);
}
/*
** Extract the command code from the packet. Point s to the end
** of the command code and calculate the length using pointer
** arithmetic. Note: only need length for numerics and *all*
** numerics must have parameters and thus a space after the command
** code. -avalon
*
* ummm???? - Dianora
*/
if( *(ch + 3) == ' ' && /* ok, lets see if its a possible numeric.. */
IsDigit(*ch) && IsDigit(*(ch + 1)) && IsDigit(*(ch + 2)) )
{
mptr = (struct Message *)NULL;
numeric = ch;
paramcount = MAXPARA;
ServerStats->is_num++;
s = ch + 3; /* I know this is ' ' from above if */
*s++ = '\0'; /* blow away the ' ', and point s to next part */
}
else
{
s = strchr(ch, ' '); /* moved from above,now need it here */
if (s)
*s++ = '\0';
mptr = tree_parse(ch);
if (!mptr || !mptr->cmd)
{
/*
* Note: Give error message *only* to recognized
* persons. It's a nightmare situation to have
* two programs sending "Unknown command"'s or
* equivalent to each other at full blast....
* If it has got to person state, it at least
* seems to be well behaving. Perhaps this message
* should never be generated, though... --msa
* Hm, when is the buffer empty -- if a command
* code has been found ?? -Armin
*
* Same thing goes for remote commands. If their local
* server accepted it, then we should not be sending
* a warning message.
*/
if (pbuffer[0] != '\0')
{
if (IsPerson(from) && MyClient(from))
sendto_one(from,
":%s %d %s %s :Unknown command",
me.name, ERR_UNKNOWNCOMMAND,
from->name, ch);
Debug((DEBUG_ERROR,"Unknown (%s) from %s",
ch, get_client_name(cptr, TRUE)));
}
ServerStats->is_unco++;
return(-1);
}
paramcount = mptr->parameters;
i = bufend - ((s) ? s : ch);
mptr->bytes += i;
/* Allow only 1 msg per 2 seconds
* (on average) to prevent dumping.
* to keep the response rate up,
* bursts of up to 5 msgs are allowed
* -SRB
* Opers can send 1 msg per second, burst of ~20
* -Taner
*/
if ((mptr->flags & 1) && !(IsServer(cptr)))
{
#ifdef NO_OPER_FLOOD
#ifndef TRUE_NO_OPER_FLOOD
/* note: both have to be defined for the real no-flood */
if (NoFloodProtection(cptr))
/* "randomly" (weighted) increase the since */
cptr->since += (cptr->receiveM % 5) ? 1 : 0;
else
#else
if (!NoFloodProtection(cptr))
#endif
#endif
cptr->since += (2 + i / 120);
}
}
/*
** Must the following loop really be so devious? On
** surface it splits the message to parameters from
** blank spaces. But, if paramcount has been reached,
** the rest of the message goes into this last parameter
** (about same effect as ":" has...) --msa
*/
/* Note initially true: s==NULL || *(s-1) == '\0' !! */
/* ZZZ hmmmmmmmm whats this then? */
#if 0
if (me.user)
para[0] = sender;
#endif
i = 1;
if (s)
{
if (paramcount > MAXPARA)
paramcount = MAXPARA;
for (;;)
{
while(*s == ' ') /* tabs are not considered space */
*s++ = '\0';
if(!*s)
break;
if (*s == ':')
{
/*
** The rest is single parameter--can
** include blanks also.
*/
para[i++] = s + 1;
break;
}
else
{
para[i++] = s;
if (i > paramcount)
{
break;
}
/* scan for end of string, either ' ' or '\0' */
while (IsNonEOS(*s))
s++;
}
}
}
para[i] = NULL;
if (mptr == (struct Message *)NULL)
return (do_numeric(numeric, cptr, from, i, para));
mptr->count++;
/* patch to avoid server flooding from unregistered connects */
/* check allow_unregistered_use flag I've set up instead of function
comparing *yech* - Dianora */
if (!IsRegistered(cptr) && !mptr->allow_unregistered_use )
{
/* if its from a possible server connection
* ignore it.. more than likely its a header thats sneaked through
*/
if(IsHandshake(cptr) || IsConnecting(cptr) || IsServer(cptr))
return -1;
sendto_one(from,
":%s %d %s %s :Register first.",
me.name, ERR_NOTREGISTERED,
BadPtr(from->name) ? "*" : from->name, ch);
return -1;
}
/* Silently drop the messages that can't be used in the honeypot */
if (IsHoneypot(cptr) && !mptr->allow_honeypot)
return -1;
/* Again, instead of function address comparing, see if
* this function resets idle time as given from mptr
* if IDLE_FROM_MSG is undefined, the sense of the flag is reversed.
* i.e. if the flag is 0, then reset idle time, otherwise don't reset it.
*
* - Dianora
*/
if (IsRegisteredUser(from) && mptr->reset_idle)
{
/* If a local registered user, propagate anti-idle updates as needed */
if (MyClient(from) && from->user && ((from->user->last_sent + MAX_IDLE_DESYNC) < CurrentTime))
{
#if 0
/* Note the misnamed message, this indicates that they are NOT idle */
#ifdef HAVE_LONG_LONG
sendto_serv_butone(NULL, ":%s IDLE %s %.1lld", cptr->name, from->name, (long long)CurrentTime);
#else
sendto_serv_butone(NULL, ":%s IDLE %s %.1ld", cptr->name, from->name, (long)CurrentTime);
#endif
#endif
from->user->last_sent = CurrentTime;
}
from->user->last = CurrentTime;
}
/* don't allow other commands while a list is blocked. since we treat
them specially with respect to sendq. */
if ((IsDoingList(cptr)) && (*mptr->func != m_list))
return -1;
return (*mptr->func)(cptr, from, i, para);
}
/*
* parse a buffer.
*
* NOTE: parse() should not be called recusively by any other functions!
*/
int new_parse(char *buffer, char *bufend)
{
char *ch;
char *s;
int i;
char* numeric = 0;
int paramcount=MAXPARA;
int parc;
s = sender;
*s = '\0';
ch = buffer;
while(*ch == ' ')
ch++;
para[0] = name;
#ifdef NEW_PARSE
if (*ch == ':')
{
ch++;
/*
** Copy the prefix to 'sender' assuming it terminates
** with SPACE (or NULL, which is an error, though).
*/
for (i = 0; *ch && *ch != ' '; i++ )
{
if (i < (sizeof(sender)-1))
*s++ = *ch++; /* leave room for NULL */
}
*s = '\0';
while (*ch == ' ')
ch++;
}
#else
if (*ch == ':')
{
/*
** Copy the prefix to 'sender' assuming it terminates
** with SPACE (or NULL, which is an error, though).
*/
for (++ch, i = 0; *ch && *ch != ' '; ++ch )
if (s < (sender + sizeof(sender)-1))
*s++ = *ch; /* leave room for NULL */
*s = '\0';
while (*ch == ' ')
ch++;
}
#endif
if(show)
printf("new parse sender [%s] i = %d\n", sender, i);
if (*ch == '\0')
{
fprintf(stderr,"empty message\n");
}
/*
** Extract the command code from the packet. Point s to the end
** of the command code and calculate the length using pointer
** arithmetic. Note: only need length for numerics and *all*
** numerics must have parameters and thus a space after the command
** code. -avalon
*
* ummm???? - Dianora
*/
if( *(ch + 3) == ' ' && /* ok, lets see if its a possible numeric.. */
IsDigit(*ch) && IsDigit(*(ch + 1)) && IsDigit(*(ch + 2)) )
{
numeric = ch;
paramcount = MAXPARA;
s = ch + 3; /* I know this is ' ' from above if */
*s++ = '\0'; /* blow away the ' ', and point s to next part */
}
else
{
s = strchr(ch, ' '); /* moved from above,now need it here */
if (s)
*s++ = '\0';
paramcount = 3;
i = bufend - ((s) ? s : ch);
if (show)
{
printf("new parse s = %lX ch = %lX\n", s , ch );
printf("new parse i = bufend - ((s) ? s : ch) = %d \n", i );
printf("new parse: paramcount %d i = %d\n", paramcount, i );
}
}
/*
** Must the following loop really be so devious?
*
* nope.
*
** On surface it splits the message to parameters from
** blank spaces. But, if paramcount has been reached,
** the rest of the message goes into this last parameter
** (about same effect as ":" has...) --msa
*/
/* Note initially true: s==NULL || *(s-1) == '\0' !! */
para[0] = sender;
i = 1;
if (s)
{
if (paramcount > MAXPARA)
paramcount = MAXPARA;
#ifdef NEW_PARSE
for (;;)
{
/* Never BAD CODE again */
while(*s == ' ') /* tabs are not considered space */
s++;
if (*s == ':')
{
/*
** The rest is single parameter--can
** include blanks also.
*/
para[i++] = s + 1;
break;
}
else
{
para[i++] = s;
if (i > paramcount)
{
break;
}
else
{
/* scan for end of string, either ' ' or '\0' */
while (IsNonEOS(*s))
s++;
if(*s == '\0')
break;
else
*s++ = '\0';
}
}
}
}
para[i] = NULL;
parc = i;
#else
for (;;)
{
/*
** Never "FRANCE " again!! ;-) Clean
** out *all* blanks.. --msa
*/
while (*s == ' ')
*s++ = '\0';
if (*s == '\0')
break;
if (*s == ':')
{
/*
** The rest is single parameter--can
** include blanks also.
*/
para[++i] = s + 1;
break;
}
para[++i] = s;
if (i >= paramcount)
break;
for (; *s != ' ' && *s; s++)
/* null statement */ ;
}
}
