/
users.c
1147 lines (970 loc) · 32.5 KB
/
users.c
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/* Routines to maintain a list of online users.
*
* (C) 2003-2009 Anope Team
* Contact us at team@anope.org
*
* Please read COPYING and README for further details.
*
* Based on the original code of Epona by Lara.
* Based on the original code of Services by Andy Church.
*
* $Id$
*
*/
#include "services.h"
#define HASH(nick) (((nick)[0]&31)<<5 | ((nick)[1]&31))
User *userlist[1024];
#define HASH2(nick) (((nick)[0]&31)<<5 | ((nick)[1]&31))
Uid *uidlist[1024];
int32 usercnt = 0, opcnt = 0;
uint32 maxusercnt = 0;
time_t maxusertime;
/*************************************************************************/
/*************************************************************************/
/* Allocate a new User structure, fill in basic values, link it to the
* overall list, and return it. Always successful.
*/
static User *new_user(const char *nick)
{
User *user, **list;
user = scalloc(sizeof(User), 1);
if (!nick)
nick = "";
strscpy(user->nick, nick, NICKMAX);
list = &userlist[HASH(user->nick)];
user->next = *list;
if (*list)
(*list)->prev = user;
*list = user;
user->na = findnick(nick);
if (user->na)
user->na->u = user;
usercnt++;
if (usercnt > maxusercnt) {
maxusercnt = usercnt;
maxusertime = time(NULL);
if (LogMaxUsers)
alog("user: New maximum user count: %d", maxusercnt);
}
user->isSuperAdmin = 0; /* always set SuperAdmin to 0 for new users */
user->nickTrack = NULL; /* ensure no default tracking nick */
return user;
}
/*************************************************************************/
/* Change the nickname of a user, and move pointers as necessary. */
static void change_user_nick(User * user, const char *nick)
{
User **list;
int is_same;
/* Sanity check to make sure we don't segfault */
if (!user || !nick || !*nick) {
return;
}
is_same = (!stricmp(user->nick, nick) ? 1 : 0);
if (user->prev)
user->prev->next = user->next;
else
userlist[HASH(user->nick)] = user->next;
if (user->next)
user->next->prev = user->prev;
user->nick[1] = 0; /* paranoia for zero-length nicks */
strscpy(user->nick, nick, NICKMAX);
list = &userlist[HASH(user->nick)];
user->next = *list;
user->prev = NULL;
if (*list)
(*list)->prev = user;
*list = user;
/* Only if old and new nick aren't the same; no need to waste time */
if (!is_same) {
if (user->na)
user->na->u = NULL;
user->na = findnick(nick);
if (user->na)
user->na->u = user;
}
}
/*************************************************************************/
void update_host(User * user)
{
if (user->na && (nick_identified(user)
|| (!(user->na->nc->flags & NI_SECURE)
&& nick_recognized(user)))) {
if (user->na->last_usermask)
free(user->na->last_usermask);
user->na->last_usermask =
smalloc(strlen(common_get_vident(user)) +
strlen(common_get_vhost(user)) + 2);
sprintf(user->na->last_usermask, "%s@%s", common_get_vident(user),
common_get_vhost(user));
}
if (debug)
alog("debug: %s changes its host to %s", user->nick,
common_get_vhost(user));
}
/*************************************************************************/
/* Change the (virtual) hostname of a user. */
void change_user_host(User * user, const char *host)
{
if (user->vhost)
free(user->vhost);
user->vhost = sstrdup(host);
if (debug)
alog("debug: %s changes its vhost to %s", user->nick, host);
update_host(user);
}
/*************************************************************************/
/* Change the realname of a user. */
void change_user_realname(User * user, const char *realname)
{
if (user->realname)
free(user->realname);
user->realname = sstrdup(realname);
if (user->na && (nick_identified(user)
|| (!(user->na->nc->flags & NI_SECURE)
&& nick_recognized(user)))) {
if (user->na->last_realname)
free(user->na->last_realname);
user->na->last_realname = sstrdup(realname);
}
if (debug)
alog("debug: %s changes its realname to %s", user->nick, realname);
}
/*************************************************************************/
/* Change the username of a user. */
void change_user_username(User * user, const char *username)
{
if (user->vident)
free(user->vident);
user->vident = sstrdup(username);
if (user->na && (nick_identified(user)
|| (!(user->na->nc->flags & NI_SECURE)
&& nick_recognized(user)))) {
if (user->na->last_usermask)
free(user->na->last_usermask);
user->na->last_usermask =
smalloc(strlen(common_get_vident(user)) +
strlen(common_get_vhost(user)) + 2);
sprintf(user->na->last_usermask, "%s@%s", common_get_vident(user),
common_get_vhost(user));
}
if (debug)
alog("debug: %s changes its username to %s", user->nick, username);
}
/*************************************************************************/
/* Remove and free a User structure. */
void delete_user(User * user)
{
struct u_chanlist *c, *c2;
struct u_chaninfolist *ci, *ci2;
char *realname;
if (LogUsers) {
realname = normalizeBuffer(user->realname);
if (ircd->vhost) {
alog("LOGUSERS: %s (%s@%s => %s) (%s) left the network (%s).",
user->nick, user->username, user->host,
(user->vhost ? user->vhost : "(none)"),
realname, user->server->name);
} else {
alog("LOGUSERS: %s (%s@%s) (%s) left the network (%s).",
user->nick, user->username, user->host,
realname, user->server->name);
}
free(realname);
}
send_event(EVENT_USER_LOGOFF, 1, user->nick);
if (debug >= 2)
alog("debug: delete_user() called");
usercnt--;
if (is_oper(user))
opcnt--;
if (debug >= 2)
alog("debug: delete_user(): free user data");
free(user->username);
free(user->host);
if (user->vhost)
free(user->vhost);
if (user->vident)
free(user->vident);
if (user->uid) {
free(user->uid);
}
Anope_Free(user->realname);
Anope_Free(user->hostip);
if (debug >= 2) {
alog("debug: delete_user(): remove from channels");
}
c = user->chans;
while (c) {
c2 = c->next;
chan_deluser(user, c->chan);
free(c);
c = c2;
}
/* This called only here now */
cancel_user(user);
if (user->na)
user->na->u = NULL;
if (debug >= 2)
alog("debug: delete_user(): free founder data");
ci = user->founder_chans;
while (ci) {
ci2 = ci->next;
free(ci);
ci = ci2;
}
if (user->nickTrack)
free(user->nickTrack);
moduleCleanStruct(&user->moduleData);
if (debug >= 2)
alog("debug: delete_user(): delete from list");
if (user->prev)
user->prev->next = user->next;
else
userlist[HASH(user->nick)] = user->next;
if (user->next)
user->next->prev = user->prev;
if (debug >= 2)
alog("debug: delete_user(): free user structure");
free(user);
if (debug >= 2)
alog("debug: delete_user() done");
}
/*************************************************************************/
/*************************************************************************/
/* Return statistics. Pointers are assumed to be valid. */
void get_user_stats(long *nusers, long *memuse)
{
long count = 0, mem = 0;
int i;
User *user;
struct u_chanlist *uc;
struct u_chaninfolist *uci;
for (i = 0; i < 1024; i++) {
for (user = userlist[i]; user; user = user->next) {
count++;
mem += sizeof(*user);
if (user->username)
mem += strlen(user->username) + 1;
if (user->host)
mem += strlen(user->host) + 1;
if (ircd->vhost) {
if (user->vhost)
mem += strlen(user->vhost) + 1;
}
if (user->realname)
mem += strlen(user->realname) + 1;
if (user->server->name)
mem += strlen(user->server->name) + 1;
for (uc = user->chans; uc; uc = uc->next)
mem += sizeof(*uc);
for (uci = user->founder_chans; uci; uci = uci->next)
mem += sizeof(*uci);
}
}
*nusers = count;
*memuse = mem;
}
/*************************************************************************/
/* Find a user by nick. Return NULL if user could not be found. */
User *finduser(const char *nick)
{
User *user;
if (!nick || !*nick) {
if (debug) {
alog("debug: finduser() called with NULL values");
}
return NULL;
}
if (debug >= 3)
alog("debug: finduser(%p)", nick);
user = userlist[HASH(nick)];
while (user && stricmp(user->nick, nick) != 0)
user = user->next;
if (debug >= 3)
alog("debug: finduser(%s) -> 0x%p", nick, (void *) user);
return user;
}
/*************************************************************************/
/* Iterate over all users in the user list. Return NULL at end of list. */
static User *current;
static int next_index;
User *firstuser(void)
{
next_index = 0;
current = NULL;
while (next_index < 1024 && current == NULL)
current = userlist[next_index++];
if (debug)
alog("debug: firstuser() returning %s",
current ? current->nick : "NULL (end of list)");
return current;
}
User *nextuser(void)
{
if (current)
current = current->next;
if (!current && next_index < 1024) {
while (next_index < 1024 && current == NULL)
current = userlist[next_index++];
}
if (debug)
alog("debug: nextuser() returning %s",
current ? current->nick : "NULL (end of list)");
return current;
}
User *find_byuid(const char *uid)
{
User *u, *next;
if (!uid) {
if (debug)
alog("debug: find_byuid() called with NULL-value");
return NULL;
}
u = first_uid();
while (u) {
next = next_uid();
if (u->uid) {
if (!stricmp(uid, u->uid)) {
return u;
}
}
u = next;
}
return NULL;
}
static User *current_uid;
static int next_index_uid;
User *first_uid(void)
{
next_index_uid = 0;
current_uid = NULL;
while (next_index_uid < 1024 && current_uid == NULL) {
current_uid = userlist[next_index_uid++];
}
if (debug >= 2) {
alog("debug: first_uid() returning %s %s",
current_uid ? current_uid->nick : "NULL (end of list)",
current_uid ? current_uid->uid : "");
}
return current_uid;
}
User *next_uid(void)
{
if (current_uid)
current_uid = current_uid->next;
if (!current_uid && next_index_uid < 1024) {
while (next_index_uid < 1024 && current_uid == NULL)
current_uid = userlist[next_index_uid++];
}
if (debug >= 2) {
alog("debug: next_uid() returning %s %s",
current_uid ? current_uid->nick : "NULL (end of list)",
current_uid ? current_uid->uid : "");
}
return current_uid;
}
Uid *new_uid(const char *nick, char *uid)
{
Uid *u, **list;
u = scalloc(sizeof(Uid), 1);
if (!nick || !uid) {
return NULL;
}
strscpy(u->nick, nick, NICKMAX);
list = &uidlist[HASH2(u->nick)];
u->next = *list;
if (*list)
(*list)->prev = u;
*list = u;
u->uid = sstrdup(uid);
return u;
}
Uid *find_uid(const char *nick)
{
Uid *u;
int i;
for (i = 0; i < 1024; i++) {
for (u = uidlist[i]; u; u = u->next) {
if (!stricmp(nick, u->nick)) {
return u;
}
}
}
return NULL;
}
Uid *find_nickuid(const char *uid)
{
Uid *u;
int i;
for (i = 0; i < 1024; i++) {
for (u = uidlist[i]; u; u = u->next) {
if (!stricmp(uid, u->uid)) {
return u;
}
}
}
return NULL;
}
/*************************************************************************/
/*************************************************************************/
/* Handle a server NICK command. */
/**
* Adds a new user to anopes internal userlist.
*
* If the SVID passed is 2, the user will not be marked registered or requested to ID.
* This is an addition to accomodate IRCds where we cannot determine this based on the NICK
* or UID command. Some IRCd's keep +r on when changing nicks and do not use SVID (ex. InspIRCd 1.2).
* Instead we get a METADATA command containing the accountname the user was last identified to.
* Since this is received after the user is introduced to us we should not yet mark the user
* as identified or ask him to identify. We will mark him as recognized for the time being and let
* him keep his +r if he has it.
* It is the responsibility of the protocol module to make sure that this is either invalidated,
* or changed to identified. ~ Viper
**/
User *do_nick(const char *source, char *nick, char *username, char *host,
char *server, char *realname, time_t ts, uint32 svid,
uint32 ip, char *vhost, char *uid)
{
User *user = NULL;
char *tmp = NULL;
NickAlias *old_na; /* Old nick rec */
int nc_changed = 1; /* Did nick core change? */
int status = 0; /* Status to apply */
char mask[USERMAX + HOSTMAX + 2];
char *logrealname;
if (!*source) {
char ipbuf[16];
struct in_addr addr;
if (ircd->nickvhost) {
if (vhost) {
if (!strcmp(vhost, "*")) {
vhost = NULL;
if (debug)
alog("debug: new user�with no vhost in NICK command: %s", nick);
}
}
}
/* This is a new user; create a User structure for it. */
if (debug)
alog("debug: new user: %s", nick);
if (ircd->nickip) {
addr.s_addr = htonl(ip);
ntoa(addr, ipbuf, sizeof(ipbuf));
}
if (LogUsers) {
/**
* Ugly swap routine for Flop's bug :)
**/
if (realname) {
tmp = strchr(realname, '%');
while (tmp) {
*tmp = '-';
tmp = strchr(realname, '%');
}
}
logrealname = normalizeBuffer(realname);
/**
* End of ugly swap
**/
if (ircd->nickvhost) {
if (ircd->nickip) {
alog("LOGUSERS: %s (%s@%s => %s) (%s) [%s] connected to the network (%s).", nick, username, host, (vhost ? vhost : "none"), logrealname, ipbuf, server);
} else {
alog("LOGUSERS: %s (%s@%s => %s) (%s) connected to the network (%s).", nick, username, host, (vhost ? vhost : "none"), logrealname, server);
}
} else {
if (ircd->nickip) {
alog("LOGUSERS: %s (%s@%s) (%s) [%s] connected to the network (%s).", nick, username, host, logrealname, ipbuf, server);
} else {
alog("LOGUSERS: %s (%s@%s) (%s) connected to the network (%s).", nick, username, host, logrealname, server);
}
}
Anope_Free(logrealname);
}
/* We used to ignore the ~ which a lot of ircd's use to indicate no
* identd response. That caused channel bans to break, so now we
* just take what the server gives us. People are still encouraged
* to read the RFCs and stop doing anything to usernames depending
* on the result of an identd lookup.
*/
/* First check for AKILLs. */
/* DONT just return null if its an akill match anymore - yes its more efficent to, however, now that ircd's are
* starting to use things like E/F lines, we cant be 100% sure the client will be removed from the network :/
* as such, create a user_struct, and if the client is removed, we'll delete it again when the QUIT notice
* comes in from the ircd.
**/
if (check_akill(nick, username, host, vhost, ipbuf)) {
/* return NULL; */
}
/**
* DefCon AKILL system, if we want to akill all connecting user's here's where to do it
* then force check_akill again on them...
**/
/* don't akill on netmerges -Certus */
/* don't akill clients introduced by ulines. -Viper */
if (is_sync(findserver(servlist, server))
&& checkDefCon(DEFCON_AKILL_NEW_CLIENTS) && !is_ulined(server)) {
strncpy(mask, "*@", 3);
strncat(mask, host, HOSTMAX);
alog("DEFCON: adding akill for %s", mask);
add_akill(NULL, mask, s_OperServ,
time(NULL) + dotime(DefConAKILL),
DefConAkillReason ? DefConAkillReason :
"DEFCON AKILL");
if (check_akill(nick, username, host, vhost, ipbuf)) {
/* return NULL; */
}
}
/* SGLINE */
if (ircd->sgline) {
if (check_sgline(nick, realname))
return NULL;
}
/* SQLINE */
if (ircd->sqline) {
if (check_sqline(nick, 0))
return NULL;
}
/* SZLINE */
if (ircd->szline && ircd->nickip) {
if (check_szline(nick, ipbuf))
return NULL;
}
/* Now check for session limits */
if (LimitSessions && !is_ulined(server)
&& !add_session(nick, host, ipbuf))
return NULL;
/* Allocate User structure and fill it in. */
user = new_user(nick);
user->username = sstrdup(username);
user->host = sstrdup(host);
user->server = findserver(servlist, server);
user->realname = sstrdup(realname);
user->timestamp = ts;
user->my_signon = time(NULL);
user->vhost = vhost ? sstrdup(vhost) : sstrdup(host);
if (uid) {
user->uid = sstrdup(uid); /* p10/ts6 stuff */
} else {
user->uid = NULL;
}
user->vident = sstrdup(username);
/* We now store the user's ip in the user_ struct,
* because we will use it in serveral places -- DrStein */
if (ircd->nickip) {
user->hostip = sstrdup(ipbuf);
} else {
user->hostip = NULL;
}
if (svid == 0) {
display_news(user, NEWS_LOGON);
display_news(user, NEWS_RANDOM);
}
if (svid == 2 && user->na) {
/* We do not yet know if the user should be identified or not.
* mark him as recognized for now.
* It s up to the protocol module to make sure this either becomes ID'd or
* is invalidated. ~ Viper */
if (debug)
alog("debug: Marking %s as recognized..", user->nick);
user->svid = 1;
user->na->status |= NS_RECOGNIZED;
nc_changed = 0;
} else if (svid == ts && user->na) {
/* Timestamp and svid match, and nick is registered; automagically identify the nick */
user->svid = svid;
user->na->status |= NS_IDENTIFIED;
check_memos(user);
nc_changed = 0;
/* Start nick tracking if available */
if (NSNickTracking)
nsStartNickTracking(user);
} else if (svid != 1) {
/* Resets the svid because it doesn't match */
user->svid = 1;
anope_cmd_svid_umode(user->nick, user->timestamp);
} else {
user->svid = 1;
}
send_event(EVENT_NEWNICK, 1, nick);
} else {
/* An old user changing nicks. */
if (UseTS6 && ircd->ts6)
user = find_byuid(source);
if (!user)
user = finduser(source);
if (!user) {
alog("user: NICK from nonexistent nick %s", source);
return NULL;
}
user->isSuperAdmin = 0; /* Dont let people nick change and stay SuperAdmins */
if (debug)
alog("debug: %s changes nick to %s", source, nick);
if (LogUsers) {
logrealname = normalizeBuffer(user->realname);
if (ircd->vhost) {
alog("LOGUSERS: %s (%s@%s => %s) (%s) changed nick to %s (%s).", user->nick, user->username, user->host, (user->vhost ? user->vhost : "(none)"), logrealname, nick, user->server->name);
} else {
alog("LOGUSERS: %s (%s@%s) (%s) changed nick to %s (%s).",
user->nick, user->username, user->host, logrealname,
nick, user->server->name);
}
if (logrealname) {
free(logrealname);
}
}
user->timestamp = ts;
if (stricmp(nick, user->nick) == 0) {
/* No need to redo things */
change_user_nick(user, nick);
nc_changed = 0;
} else {
/* Update this only if nicks aren't the same */
user->my_signon = time(NULL);
old_na = user->na;
if (old_na) {
if (nick_recognized(user))
user->na->last_seen = time(NULL);
status = old_na->status & NS_TRANSGROUP;
cancel_user(user);
}
change_user_nick(user, nick);
send_event(EVENT_CHANGE_NICK, 1, nick);
if ((old_na ? old_na->nc : NULL) ==
(user->na ? user->na->nc : NULL))
nc_changed = 0;
if (!nc_changed && (user->na))
user->na->status |= status;
else {
anope_cmd_nc_change(user);
}
}
if (ircd->sqline) {
if (!is_oper(user) && check_sqline(user->nick, 1))
return NULL;
}
} /* if (!*source) */
/* Check for nick tracking to bypass identification */
if (NSNickTracking && nsCheckNickTracking(user)) {
user->na->status |= NS_IDENTIFIED;
nc_changed = 0;
}
if (nc_changed || !nick_recognized(user)) {
if (validate_user(user))
check_memos(user);
} else {
if (nick_identified(user)) {
char tsbuf[16];
user->na->last_seen = time(NULL);
if (user->na->last_usermask)
free(user->na->last_usermask);
user->na->last_usermask =
smalloc(strlen(common_get_vident(user)) +
strlen(common_get_vhost(user)) + 2);
sprintf(user->na->last_usermask, "%s@%s",
common_get_vident(user), common_get_vhost(user));
snprintf(tsbuf, sizeof(tsbuf), "%lu",
(unsigned long int) user->timestamp);
anope_cmd_svid_umode2(user, tsbuf);
alog("%s: %s!%s@%s automatically identified for nick %s",
s_NickServ, user->nick, user->username,
user->host, user->nick);
}
}
/* Bahamut sets -r on every nick changes, so we must test it even if nc_changed == 0 */
if (ircd->check_nick_id) {
if (nick_identified(user)) {
char tsbuf[16];
snprintf(tsbuf, sizeof(tsbuf), "%lu",
(unsigned long int) user->timestamp);
anope_cmd_svid_umode3(user, tsbuf);
}
}
return user;
}
/*************************************************************************/
/* Handle a MODE command for a user.
* av[0] = nick to change mode for
* av[1] = modes
*/
void do_umode(const char *source, int ac, char **av)
{
User *user;
user = finduser(av[0]);
if (!user) {
alog("user: MODE %s for nonexistent nick %s: %s", av[1], av[0],
merge_args(ac, av));
return;
}
anope_set_umode(user, ac - 1, &av[1]);
}
/* Handle a UMODE2 command for a user.
* av[0] = modes
*/
void do_umode2(const char *source, int ac, char **av)
{
User *user;
user = finduser(source);
if (!user) {
alog("user: MODE %s for nonexistent nick %s: %s", av[0], source,
merge_args(ac, av));
return;
}
anope_set_umode(user, ac, &av[0]);
}
/*************************************************************************/
/* Handle a QUIT command.
* av[0] = reason
*/
void do_quit(const char *source, int ac, char **av)
{
User *user;
NickAlias *na;
user = finduser(source);
if (!user) {
alog("user: QUIT from nonexistent user %s: %s", source,
merge_args(ac, av));
return;
}
if (debug) {
alog("debug: %s quits", source);
}
if ((na = user->na) && (!(na->status & NS_VERBOTEN))
&& (!(na->nc->flags & NI_SUSPENDED))
&& (na->status & (NS_IDENTIFIED | NS_RECOGNIZED))) {
na->last_seen = time(NULL);
if (na->last_quit)
free(na->last_quit);
na->last_quit = *av[0] ? sstrdup(av[0]) : NULL;
}
if (LimitSessions && !is_ulined(user->server->name)) {
del_session(user->host);
}
delete_user(user);
}
/*************************************************************************/
/* Handle a KILL command.
* av[0] = nick being killed
* av[1] = reason
*/
void do_kill(char *nick, char *msg)
{
User *user;
NickAlias *na;
user = finduser(nick);
if (!user) {
if (debug) {
alog("debug: KILL of nonexistent nick: %s", nick);
}
return;
}
if (debug) {
alog("debug: %s killed", nick);
}
if ((na = user->na) && (!(na->status & NS_VERBOTEN))
&& (!(na->nc->flags & NI_SUSPENDED))
&& (na->status & (NS_IDENTIFIED | NS_RECOGNIZED))) {
na->last_seen = time(NULL);
if (na->last_quit)
free(na->last_quit);
na->last_quit = *msg ? sstrdup(msg) : NULL;
}
if (LimitSessions && !is_ulined(user->server->name)) {
del_session(user->host);
}
delete_user(user);
}
/*************************************************************************/
/*************************************************************************/
/* Is the given user protected from kicks and negative mode changes? */
int is_protected(User * user)
{
if (ircd->protectedumode) {
return (user->mode & ircd->protectedumode);
} else {
return 0;
}
}
/*************************************************************************/
/* Is the given nick an oper? */
int is_oper(User * user)
{
if (user) {
return (user->mode & anope_get_oper_mode());
} else {
return 0;
}
}
/*************************************************************************/
/*************************************************************************/
/* Is the given user ban-excepted? */
int is_excepted(ChannelInfo * ci, User * user)
{
if (!ci->c || !ircd->except)
return 0;
if (elist_match_user(ci->c->excepts, user))
return 1;
return 0;
}
/*************************************************************************/
/* Is the given MASK ban-excepted? */
int is_excepted_mask(ChannelInfo * ci, char *mask)
{
if (!ci->c || !ircd->except)
return 0;
if (elist_match_mask(ci->c->excepts, mask, 0))
return 1;
return 0;
}
/*************************************************************************/
/* Does the user's usermask match the given mask (either nick!user@host or
* just user@host)?
*/
int match_usermask(const char *mask, User * user)
{
char *mask2;
char *nick, *username, *host;
int result;
if (!mask || !*mask) {
return 0;
}
mask2 = sstrdup(mask);
if (strchr(mask2, '!')) {
nick = strtok(mask2, "!");
username = strtok(NULL, "@");
} else {
nick = NULL;
username = strtok(mask2, "@");
}
host = strtok(NULL, "");
if (!username || !host) {
free(mask2);
return 0;
}