pair<u8 *, size_t> setupFDRFloodControl(const vector<hwlmLiteral> &lits,
const EngineDescription &eng) {
vector<FDRFlood> tmpFlood(N_CHARS);
u32 default_suffix = eng.getDefaultFloodSuffixLength();
// zero everything to avoid spurious distinctions in the compares
memset(&tmpFlood[0], 0, N_CHARS * sizeof(FDRFlood));
for (u32 c = 0; c < N_CHARS; c++) {
tmpFlood[c].suffix = default_suffix;
}
for (const auto &lit : lits) {
DEBUG_PRINTF("lit: '%s'%s\n", escapeString(lit.s).c_str(),
lit.nocase ? " (nocase)" : "");
u32 litSize = verify_u32(lit.s.size());
u32 maskSize = (u32)lit.msk.size();
u8 c = lit.s[litSize - 1];
bool nocase = ourisalpha(c) ? lit.nocase : false;
if (nocase && maskSize && (lit.msk[maskSize - 1] & CASE_BIT)) {
c = (lit.cmp[maskSize - 1] & CASE_BIT) ? mytolower(c) : mytoupper(c);
nocase = false;
}
u32 iEnd = MAX(litSize, maskSize);
u32 upSuffix = iEnd; // upSuffix is used as an upper case suffix length
// for case-less, or as a suffix length for case-sensitive;
u32 loSuffix = iEnd; // loSuffix used only for case-less as a lower case suffix
// length;
for (u32 i = 0; i < iEnd; i++) {
if (i < litSize) {
if (isDifferent(c, lit.s[litSize - i - 1], lit.nocase)) {
DEBUG_PRINTF("non-flood char in literal[%u] %c != %c\n",
i, c, lit.s[litSize - i - 1]);
upSuffix = MIN(upSuffix, i);
loSuffix = MIN(loSuffix, i); // makes sense only for case-less
break;
}
}
if (i < maskSize) {
u8 m = lit.msk[maskSize - i - 1];
u8 cm = lit.cmp[maskSize - i - 1] & m;
if(nocase) {
if ((mytoupper(c) & m) != cm) {
DEBUG_PRINTF("non-flood char in mask[%u] %c != %c\n",
i, mytoupper(c), cm);
upSuffix = MIN(upSuffix, i);
}
if ((mytolower(c) & m) != cm) {
DEBUG_PRINTF("non-flood char in mask[%u] %c != %c\n",
i, mytolower(c), cm);
loSuffix = MIN(loSuffix, i);
}
if (loSuffix != iEnd && upSuffix != iEnd) {
break;
}
} else if ((c & m) != cm) {
DEBUG_PRINTF("non-flood char in mask[%u] %c != %c\n", i, c, cm);
upSuffix = MIN(upSuffix, i);
break;
}
}
}
if(upSuffix != iEnd) {
updateFloodSuffix(tmpFlood, nocase ? mytoupper(c) : c, upSuffix);
} else {
addFlood(tmpFlood, nocase ? mytoupper(c) : c, lit, upSuffix);
}
if (nocase) {
if(loSuffix != iEnd) {
updateFloodSuffix(tmpFlood, mytolower(c), loSuffix);
} else {
addFlood(tmpFlood, mytolower(c), lit, loSuffix);
}
}
}
#ifdef DEBUG
for (u32 i = 0; i < N_CHARS; i++) {
FDRFlood &fl = tmpFlood[i];
if (!fl.idCount) {
continue;
}
printf("i is %02x fl->idCount is %hd fl->suffix is %d fl->allGroups is "
"%016llx\n", i, fl.idCount, fl.suffix, fl.allGroups);
for (u32 j = 0; j < fl.idCount; j++) {
printf("j is %d fl.groups[j] %016llx fl.len[j] %d \n", j,
fl.groups[j], fl.len[j]);
}
}
#endif
map<FDRFlood, CharReach, FloodComparator> flood2chars;
for (u32 i = 0; i < N_CHARS; i++) {
FDRFlood fl = tmpFlood[i];
flood2chars[fl].set(i);
}
u32 nDistinctFloods = flood2chars.size();
size_t floodHeaderSize = sizeof(u32) * N_CHARS;
size_t floodStructSize = sizeof(FDRFlood) * nDistinctFloods;
size_t totalSize = ROUNDUP_16(floodHeaderSize + floodStructSize);
u8 *buf = (u8 *)aligned_zmalloc(totalSize);
assert(buf); // otherwise would have thrown std::bad_alloc
u32 *floodHeader = (u32 *)buf;
FDRFlood *layoutFlood = (FDRFlood * )(buf + floodHeaderSize);
u32 currentFloodIndex = 0;
for (const auto &m : flood2chars) {
const FDRFlood &fl = m.first;
const CharReach &cr = m.second;
layoutFlood[currentFloodIndex] = fl;
for (size_t c = cr.find_first(); c != cr.npos; c = cr.find_next(c)) {
floodHeader[c] = currentFloodIndex;
}
currentFloodIndex++;
}
DEBUG_PRINTF("made a flood structure with %zu + %zu = %zu\n",
floodHeaderSize, floodStructSize, totalSize);
return make_pair((u8 *)buf, totalSize);
}
/*
* WARNING WARNING WARNING
*
* This function is very ugly in terms of args handling, and it is
* very easy to inadvertently break something if you make small tweaks
* to it.
*
* args and numargs do NOT always map together in this function,
* for example numargs = 3, means that args really has 3+3=6 elements
* in some points: numargs should be numargs2.
*
* Basically, the bottom two elements of args[] are dropped
* in this function when
* it goes to args2 to call the particular handlers -Mysid
*/
void
parseLine(char *line)
{
int i = 0, a = 0, x = 0, prefixed = 0;
char *args2[MAX_IRC_LINE_LEN + 5];
char *args[MAX_IRC_LINE_LEN + 5];
char realargs[151][151];
u_int16_t numargs = 0;
/*
* Seems Ok to me ^^^
* sizes may be off(?)
*/
/* Yes, your sizes were off.. -Mysid */
strncpyzt(coreBuffer, line, MAX_IRC_LINE_LEN);
#ifdef DEBUG
printf("Read: %s\n", coreBuffer);
#endif
CTime = time(NULL);
while (*line && x < 150) {
while (*line != ' ' && *line && a < 150) {
realargs[x][a] = *line;
a++;
line++;
}
realargs[x][a] = 0;
args[x] = realargs[x];
x++;
numargs++;
while (*line == ' ')
line++;
a = 0;
}
/* ensure the next item is null so we can check it later */
realargs[x][0] = 0;
args[x] = realargs[x];
if (args[0][0] == ':') {
prefixed = 1;
/** \bug old lame bugfix, what would be better is to use a 'from'
value and args++'ing it, if there's no prefix then
have from set to the uplink -Mysid */
args[0]++;
} else
prefixed = 0;
if (!strcmp(args[0], "PING") && !prefixed) {
sSend("PONG :%s", myname);
return;
}
else if (!strcmp(args[0], "ERROR") && !strcmp(args[1], ":Closing"))
sshutdown(0);
else if (!strcmp(args[0], "NICK") && !prefixed) {
if (strchr(args[4], '*') || strchr(args[4], '?')
|| strchr(args[4], '!') || strchr(args[4], '@')) {
char nick[NICKLEN];
strncpyzt(nick, args[1], NICKLEN);
sSend
(":%s KILL %s :%s!%s (Your ident reply contains either a *, !, @, or ?. Please remove this before returning.)",
services[1].name, nick, services[1].host,
services[1].name);
addGhost(nick);
timer(15, delTimedGhost, strdup(nick));
return;
}
addNewUser(args, numargs); /* nickserv.c, add new user. */
return;
}
if (!strcmp(args[1], "PRIVMSG")) {
UserList *tmp = getNickData(args[0]);
if (strchr(args[2], '#') || strchr(args[2], '$'))
return;
if (!strcasecmp(args[0], NickServ)
|| !strcasecmp(args[0], GameServ)
|| !strcasecmp(args[0], OperServ)
|| !strcasecmp(args[0], ChanServ)
|| !strcasecmp(args[0], MemoServ)
|| !strcasecmp(args[0], InfoServ)) return;
if (tmp && tmp->reg && tmp->reg->flags & NBANISH) {
sSend(":%s NOTICE %s :This nickname is banished."
" You cannot use services until you change"
" nicknames.",
NickServ, args[0]);
return;
}
if (!tmp) {
nDesynch(args[0], "PRIVMSG");
return;
}
if (addFlood(tmp, 1))
return;
if (getBanInfo(tmp->nick, tmp->user, tmp->host, A_IGNORE) != NULL) {
if (tmp->floodlevel.GetLev() < 2)
sSend
(":%s NOTICE %s :You are on services ignore, you may not use any Service",
NickServ, tmp->nick);
if (!isOper(tmp) || tmp->caccess < ACC_RECOGNIZED || !tmp->reg
|| !(tmp->reg->opflags & OROOT))
return;
}
args[3]++;
while (*args[3] == ' ')
args[3]++;
for (i = 3; i < numargs; i++)
args2[i - 3] = args[i];
numargs -= 3;
/* Handle pings before even going to the services */
if (!strcasecmp(args2[0], "\001PING")) {
if (addFlood(tmp, 3))
return;
if (numargs < 3)
sSend(":%s NOTICE %s :\001PING %s", args[2], args[0],
args2[1]);
else
sSend(":%s NOTICE %s :\001PING %s %s", args[2], args[0],
args2[1], args2[2]);
return;
}
/* NOTE: numargs maps to args2 not args at this point */
if (!strncasecmp(args[2], OperServ, strlen(OperServ)))
sendToOperServ(tmp, args2, numargs);
else if (!strncasecmp(args[2], NickServ, strlen(NickServ)))
sendToNickServ(tmp, args2, numargs);
else if (!strncasecmp(args[2], ChanServ, strlen(ChanServ)))
sendToChanServ(tmp, args2, numargs);
else if (!strncasecmp(args[2], MemoServ, strlen(MemoServ)))
sendToMemoServ(tmp, args2, numargs);
else if (!strncasecmp(args[2], InfoServ, strlen(InfoServ)))
sendToInfoServ(tmp, args2, numargs);
else if (!strncasecmp(args[2], GameServ, strlen(GameServ)))
sendToGameServ(tmp, args2, numargs);
else if (isGhost(args[2])) {
sSend
(":%s NOTICE %s :This is a NickServ registered nick enforcer, and not a real user.",
args[2], args[0]);
}
/* Note, the below should be correct. */
else if ((numargs >= 1) && adCheck(tmp, args[2], args2, numargs))
return;
return;
}
else if (!strcmp(args[1], "QUIT")) {
remUser(args[0], 0);
return;
} else if (!strcmp(args[1], "NICK")) {
UserList *tmp = getNickData(args[0]);
if (addFlood(tmp, 5))
return;
changeNick(args[0], args[2], args[3]);
return;
} else if (!strcmp(args[1], "MODE") && !strcmp(args[0], args[2])) {
setMode(args[0], args[3]);
return;
} else if (!strcmp(args[1], "MODE")) {
setChanMode(args, numargs);
return;
} else if (!strcmp(args[1], "TOPIC")) {
setChanTopic(args, numargs);
return;
} else if (!strcmp(args[1], "AWAY")) {
if (numargs < 3) {
setFlags(args[0], NISAWAY, '-');
checkMemos(getNickData(args[0]));
} else
setFlags(args[0], NISAWAY, '+');
return;
}
else if (!strcmp(args[1], "JOIN")) {
addUserToChan(getNickData(args[0]), args[2]);
return;
} else if (!strcmp(args[1], "PART")) {
remUserFromChan(getNickData(args[0]), args[2]);
return;
} else if (!strcmp(args[1], "KICK")) {
remUserFromChan(getNickData(args[3]), args[2]);
return;
}
else if (!strcmp(args[1], "KILL")) {
int i;
for (i = 0; i < NUMSERVS; i++) {
if (!strcasecmp(args[2], services[i].name)) {
addUser(services[i].name, services[i].uname,
services[i].host, services[i].rname,
services[i].mode);
sSend(":%s KILL %s :%s!%s (services kill protection)",
services[i].name, args[0], services[i].host,
services[i].name);
sSend(":%s GLOBOPS :%s just killed me!", services[i].name,
args[0]);
remUser(args[0], 0);
return;
}
}
if (isGhost(args[2])) {
delGhost(args[2]);
return;
}
else
remUser(args[2], 1);
return;
} else if (!strcmp(args[1], "MOTD")) {
UserList *tmp = getNickData(args[0]);
if (addFlood(tmp, 1))
return;
motd(args[0]);
return;
}
else if (!strcmp(args[1], "INFO")) {
UserList *tmp = getNickData(args[0]);
if (!tmp || addFlood(tmp, 3))
return;
sendInfoReply(tmp);
return;
}
else if (!strcmp(args[1], "VERSION")) {
UserList *tmp = getNickData(args[0]);
if (addFlood(tmp, 1))
return;
sSend(":%s 351 %s %s %s :%s", myname, args[0], VERSION_STRING,
myname, VERSION_QUOTE);
return;
} else if ((!strcmp(args[1], "GNOTICE") || !strcmp(args[1], "GLOBOPS"))
&& !strcmp(args[2], ":Link") && !strcmp(args[3], "with")
&& !strncmp(args[4], myname, strlen(myname))) {
sSend(":%s GNOTICE :Link with %s[services@%s] established.",
myname, args[0], hostname);
strncpyzt(hostname, args[0], sizeof(hostname));
expireNicks(NULL);
expireChans(NULL);
sync_cfg("1");
checkTusers(NULL);
flushLogs(NULL);
nextNsync = (SYNCTIME + CTime);
nextCsync = ((SYNCTIME * 2) + CTime);
nextMsync = ((SYNCTIME * 3) + CTime);
loadakills();
return;
}
#ifdef IRCD_HURTSET
else if (!strcmp(args[1], "HURTSET") && (numargs >= 4)) {
UserList *hurtwho;
if ((hurtwho = getNickData(args[2]))) {
if (args[3] && *args[3] == '-')
hurtwho->oflags &= ~(NISAHURT);
else if (args[3] && atoi(args[3]) == 4) {
hurtwho->oflags |= (NISAHURT);
}
else if (args[3] && isdigit(*args[3])
&& (getBanInfo(hurtwho->nick, hurtwho->user,
hurtwho->host, A_AHURT) != NULL))
hurtwho->oflags |= (NISAHURT);
}
}
#endif
else if (!strcmp(args[1], "SQUIT")) {
time_t jupe;
jupe = time(NULL);
if (strchr(args[2], '.'))
return;
sSend(":%s WALLOPS :%s Un-jupitered by %s at %s", myname, args[2],
args[0], ctime(&(jupe)));
return;
}
else if (!strcmp(args[1], "STATS") && numargs > 3) {
const char* from = args[0];
if (args[2] && !strcasecmp(args[2], "OPTS"))
{
sSend(":%s NOTICE %s :Network name: %s", InfoServ, from, NETWORK);
#ifdef AKILLMAILTO
sSend(":%s NOTICE %s :Akill log address: %s", InfoServ, from,
AKILLMAILTO);
#endif
#ifdef ENABLE_GRPOPS
sSend(":%s NOTICE %s :GRPops enabled.", InfoServ, from);
#endif
#ifdef MD5_AUTH
sSend(":%s NOTICE %s :MD5 authentication available.", InfoServ, from);
#endif
}
else if (args[2] && !strcasecmp(args[2], "V$"))
{
sSend(":%s NOTICE %s :Based on sn services1.4.", InfoServ, from);
}
}
/* "No N-line" error */
else if (!strcmp(args[0], "ERROR") && !strcmp(args[1], ":No")) {
fprintf(stderr, "Error connecting to server: No N-line\n");
sshutdown(2);
}
}
