X-Git-Url: https://jfr.im/git/irc/rqf/shadowircd.git/blobdiff_plain/907468c485f837cb8442c32509c8efec8f3f43b1..8097430a810ac1535fe5304f74991b16ff58b064:/modules/core/m_nick.c

diff --git a/modules/core/m_nick.c b/modules/core/m_nick.c
index dd827b8..eec78fa 100644
--- a/modules/core/m_nick.c
+++ b/modules/core/m_nick.c
@@ -27,7 +27,7 @@
 #include "stdinc.h"
 #include "client.h"
 #include "hash.h"
-#include "irc_string.h"
+#include "match.h"
 #include "ircd.h"
 #include "numeric.h"
 #include "s_conf.h"
@@ -68,7 +68,7 @@ static void bad_nickname(struct Client *, const char *);
 
 struct Message nick_msgtab = {
 	"NICK", 0, 0, 0, MFLG_SLOW,
-	{{mr_nick, 0}, {m_nick, 0}, {mc_nick, 3}, {ms_nick, 8}, mg_ignore, {m_nick, 0}}
+	{{mr_nick, 0}, {m_nick, 0}, {mc_nick, 3}, {ms_nick, 0}, mg_ignore, {m_nick, 0}}
 };
 struct Message uid_msgtab = {
 	"UID", 0, 0, 0, MFLG_SLOW,
@@ -108,7 +108,6 @@ static int perform_nickchange_collides(struct Client *, struct Client *,
 				       struct Client *, int, const char **, time_t, const char *);
 
 /* mr_nick()
- *       parv[0] = sender prefix
  *       parv[1] = nickname
  */
 static int
@@ -145,7 +144,7 @@ mr_nick(struct Client *client_p, struct Client *source_p, int parc, const char *
 	if(!clean_nick(nick, 1))
 	{
 		sendto_one(source_p, form_str(ERR_ERRONEUSNICKNAME),
-			   me.name, EmptyString(parv[0]) ? "*" : parv[0], parv[1]);
+			   me.name, EmptyString(source_p->name) ? "*" : source_p->name, parv[1]);
 		return 0;
 	}
 
@@ -175,7 +174,6 @@ mr_nick(struct Client *client_p, struct Client *source_p, int parc, const char *
 }
 
 /* m_nick()
- *     parv[0] = sender prefix
  *     parv[1] = nickname
  */
 static int
@@ -208,7 +206,7 @@ m_nick(struct Client *client_p, struct Client *source_p, int parc, const char *p
 	/* check the nickname is ok */
 	if(!clean_nick(nick, 1))
 	{
-		sendto_one(source_p, form_str(ERR_ERRONEUSNICKNAME), me.name, parv[0], nick);
+		sendto_one(source_p, form_str(ERR_ERRONEUSNICKNAME), me.name, source_p->name, nick);
 		return 0;
 	}
 
@@ -245,7 +243,7 @@ m_nick(struct Client *client_p, struct Client *source_p, int parc, const char *p
 			change_local_nick(client_p, source_p, nick, 1);
 		}
 		else
-			sendto_one(source_p, form_str(ERR_NICKNAMEINUSE), me.name, parv[0], nick);
+			sendto_one(source_p, form_str(ERR_NICKNAMEINUSE), me.name, source_p->name, nick);
 
 		return 0;
 	}
@@ -255,23 +253,11 @@ m_nick(struct Client *client_p, struct Client *source_p, int parc, const char *p
 	return 0;
 }
 
-/* ms_nick()
+/* mc_nick()
  *      
  * server -> server nick change
- *    parv[0] = sender prefix
  *    parv[1] = nickname
  *    parv[2] = TS when nick change
- *
- * server introducing new nick
- *    parv[0] = sender prefix
- *    parv[1] = nickname
- *    parv[2] = hop count
- *    parv[3] = TS
- *    parv[4] = umode
- *    parv[5] = username
- *    parv[6] = hostname
- *    parv[7] = server
- *    parv[8] = ircname
  */
 static int
 mc_nick(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
@@ -316,74 +302,21 @@ mc_nick(struct Client *client_p, struct Client *source_p, int parc, const char *
 static int
 ms_nick(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 {
-	struct Client *target_p;
-	time_t newts = 0;
-
-	if(parc != 9)
-	{
-		sendto_realops_snomask(SNO_GENERAL, L_ALL,
-				     "Dropping server %s due to (invalid) command 'NICK' "
-				     "with %d arguments (expecting 9)", client_p->name, parc);
-		ilog(L_SERVER, "Excess parameters (%d) for command 'NICK' from %s.",
-		     parc, client_p->name);
-		exit_client(client_p, client_p, client_p, "Excess parameters to NICK command");
-		return 0;
-	}
-
-	/* if nicks empty, erroneous, or too long, kill */
-	if(!clean_nick(parv[1], 0))
-	{
-		bad_nickname(client_p, parv[1]);
-		return 0;
-	}
-
-	/* invalid username or host? */
-	if(!clean_username(parv[5]) || !clean_host(parv[6]))
-	{
-		ServerStats.is_kill++;
-		sendto_realops_snomask(SNO_DEBUG, L_ALL,
-				     "Bad user@host: %s@%s From: %s(via %s)",
-				     parv[5], parv[6], parv[7], client_p->name);
-		sendto_one(client_p, ":%s KILL %s :%s (Bad user@host)", me.name, parv[1], me.name);
-		return 0;
-	}
+	const char *nick, *server;
 
-	/* check the length of the clients gecos */
-	if(strlen(parv[8]) > REALLEN)
-	{
-		char *s = LOCAL_COPY(parv[8]);
-		/* why exactly do we care? --fl */
-		sendto_realops_snomask(SNO_GENERAL, L_ALL,
-				     "Long realname from server %s for %s", parv[7], parv[1]);
+	nick = parc > 1 ? parv[1] : "?";
+	server = parc > 7 ? parv[7] : "?";
 
-		s[REALLEN] = '\0';
-		parv[8] = s;
-	}
-
-	newts = atol(parv[3]);
+	sendto_wallops_flags(UMODE_WALLOP, &me,
+			"Link %s cancelled, TS5 nickname %s on %s introduced (old server?)",
+			client_p->name, nick, server);
+	sendto_server(NULL, NULL, CAP_TS6, NOCAPS,
+			":%s WALLOPS :Link %s cancelled, TS5 nickname %s on %s introduced (old server?)",
+			me.id, client_p->name, nick, server);
+	ilog(L_SERVER, "Link %s cancelled, TS5 nickname %s on %s introduced (old server?)",
+			client_p->name, nick, server);
 
-	target_p = find_named_client(parv[1]);
-
-	/* if the nick doesnt exist, allow it and process like normal */
-	if(target_p == NULL)
-	{
-		register_client(client_p, NULL, parv[1], newts, parc, parv);
-	}
-	else if(IsUnknown(target_p))
-	{
-		exit_client(NULL, target_p, &me, "Overridden");
-		register_client(client_p, NULL, parv[1], newts, parc, parv);
-	}
-	else if(target_p == source_p)
-	{
-		/* client changing case of nick */
-		if(strcmp(target_p->name, parv[1]))
-			register_client(client_p, NULL, parv[1], newts, parc, parv);
-	}
-	/* we've got a collision! */
-	else
-		perform_nick_collides(source_p, client_p, target_p, parc, parv,
-				      newts, parv[1], NULL);
+	exit_client(client_p, client_p, &me, "TS5 nickname introduced");
 
 	return 0;
 }
@@ -404,6 +337,7 @@ ms_uid(struct Client *client_p, struct Client *source_p, int parc, const char *p
 {
 	struct Client *target_p;
 	time_t newts = 0;
+	char squitreason[120];
 
 	newts = atol(parv[3]);
 
@@ -414,7 +348,10 @@ ms_uid(struct Client *client_p, struct Client *source_p, int parc, const char *p
 				     "with %d arguments (expecting 10)", client_p->name, parc);
 		ilog(L_SERVER, "Excess parameters (%d) for command 'UID' from %s.",
 		     parc, client_p->name);
-		exit_client(client_p, client_p, client_p, "Excess parameters to UID command");
+		rb_snprintf(squitreason, sizeof squitreason,
+				"Excess parameters (%d) to %s command, expecting %d",
+				parc, "UID", 10);
+		exit_client(client_p, client_p, client_p, squitreason);
 		return 0;
 	}
 
@@ -425,23 +362,22 @@ ms_uid(struct Client *client_p, struct Client *source_p, int parc, const char *p
 		return 0;
 	}
 
-	if(!clean_username(parv[5]) || !clean_host(parv[6]))
+	if(!clean_uid(parv[8]))
 	{
-		ServerStats.is_kill++;
-		sendto_realops_snomask(SNO_DEBUG, L_ALL,
-				     "Bad user@host: %s@%s From: %s(via %s)",
-				     parv[5], parv[6], source_p->name, client_p->name);
-		sendto_one(client_p, ":%s KILL %s :%s (Bad user@host)", me.id, parv[8], me.name);
+		rb_snprintf(squitreason, sizeof squitreason,
+				"Invalid UID %s for nick %s on %s",
+				parv[8], parv[1], source_p->name);
+		exit_client(client_p, client_p, client_p, squitreason);
 		return 0;
 	}
 
-	if(!clean_uid(parv[8]))
+	if(!clean_username(parv[5]) || !clean_host(parv[6]))
 	{
 		ServerStats.is_kill++;
 		sendto_realops_snomask(SNO_DEBUG, L_ALL,
-				     "Bad UID: %s From: %s(via %s)",
-				     parv[8], source_p->name, client_p->name);
-		sendto_one(client_p, ":%s KILL %s :%s (Bad UID)", me.id, parv[8], me.name);
+				     "Bad user@host: %s@%s From: %s(via %s)",
+				     parv[5], parv[6], source_p->name, client_p->name);
+		sendto_one(client_p, ":%s KILL %s :%s (Bad user@host)", me.id, parv[8], me.name);
 		return 0;
 	}
 
@@ -450,7 +386,7 @@ ms_uid(struct Client *client_p, struct Client *source_p, int parc, const char *p
 	{
 		char *s = LOCAL_COPY(parv[9]);
 		sendto_realops_snomask(SNO_GENERAL, L_ALL, "Long realname from server %s for %s",
-				     parv[0], parv[1]);
+				     source_p->name, parv[1]);
 		s[REALLEN] = '\0';
 		parv[9] = s;
 	}
@@ -492,6 +428,7 @@ ms_euid(struct Client *client_p, struct Client *source_p, int parc, const char *
 {
 	struct Client *target_p;
 	time_t newts = 0;
+	char squitreason[120];
 
 	newts = atol(parv[3]);
 
@@ -502,7 +439,10 @@ ms_euid(struct Client *client_p, struct Client *source_p, int parc, const char *
 				     "with %d arguments (expecting 12)", client_p->name, parc);
 		ilog(L_SERVER, "Excess parameters (%d) for command 'EUID' from %s.",
 		     parc, client_p->name);
-		exit_client(client_p, client_p, client_p, "Excess parameters to EUID command");
+		rb_snprintf(squitreason, sizeof squitreason,
+				"Excess parameters (%d) to %s command, expecting %d",
+				parc, "EUID", 12);
+		exit_client(client_p, client_p, client_p, squitreason);
 		return 0;
 	}
 
@@ -513,23 +453,22 @@ ms_euid(struct Client *client_p, struct Client *source_p, int parc, const char *
 		return 0;
 	}
 
-	if(!clean_username(parv[5]) || !clean_host(parv[6]))
+	if(!clean_uid(parv[8]))
 	{
-		ServerStats.is_kill++;
-		sendto_realops_snomask(SNO_DEBUG, L_ALL,
-				     "Bad user@host: %s@%s From: %s(via %s)",
-				     parv[5], parv[6], source_p->name, client_p->name);
-		sendto_one(client_p, ":%s KILL %s :%s (Bad user@host)", me.id, parv[8], me.name);
+		rb_snprintf(squitreason, sizeof squitreason,
+				"Invalid UID %s for nick %s on %s",
+				parv[8], parv[1], source_p->name);
+		exit_client(client_p, client_p, client_p, squitreason);
 		return 0;
 	}
 
-	if(!clean_uid(parv[8]))
+	if(!clean_username(parv[5]) || !clean_host(parv[6]))
 	{
 		ServerStats.is_kill++;
 		sendto_realops_snomask(SNO_DEBUG, L_ALL,
-				     "Bad UID: %s From: %s(via %s)",
-				     parv[8], source_p->name, client_p->name);
-		sendto_one(client_p, ":%s KILL %s :%s (Bad UID)", me.id, parv[8], me.name);
+				     "Bad user@host: %s@%s From: %s(via %s)",
+				     parv[5], parv[6], source_p->name, client_p->name);
+		sendto_one(client_p, ":%s KILL %s :%s (Bad user@host)", me.id, parv[8], me.name);
 		return 0;
 	}
 
@@ -548,7 +487,7 @@ ms_euid(struct Client *client_p, struct Client *source_p, int parc, const char *
 	{
 		char *s = LOCAL_COPY(parv[11]);
 		sendto_realops_snomask(SNO_GENERAL, L_ALL, "Long realname from server %s for %s",
-				     parv[0], parv[1]);
+				     source_p->name, parv[1]);
 		s[REALLEN] = '\0';
 		parv[11] = s;
 	}
@@ -752,6 +691,16 @@ change_local_nick(struct Client *client_p, struct Client *source_p,
 					nick, chptr->chname);
 			return;
 		}
+
+		chptr = find_nonickchange_channel(source_p);
+		if (chptr != NULL)
+		{
+			sendto_one_numeric(source_p, ERR_NONICK,
+					form_str(ERR_NONICK),
+					chptr->chname);
+			return;
+		}
+
 		if((source_p->localClient->last_nick_change + ConfigFileEntry.max_nick_time) < rb_current_time())
 			source_p->localClient->number_of_nick_changes = 0;
 
@@ -801,8 +750,6 @@ change_local_nick(struct Client *client_p, struct Client *source_p,
 		{
 			sendto_server(client_p, NULL, CAP_TS6, NOCAPS, ":%s NICK %s :%ld",
 					use_id(source_p), nick, (long) source_p->tsinfo);
-			sendto_server(client_p, NULL, NOCAPS, CAP_TS6, ":%s NICK %s :%ld",
-					source_p->name, nick, (long) source_p->tsinfo);
 		}
 	}
 
@@ -862,8 +809,6 @@ change_remote_nick(struct Client *client_p, struct Client *source_p,
 		{
 			sendto_server(client_p, NULL, CAP_TS6, NOCAPS, ":%s NICK %s :%ld",
 					use_id(source_p), nick, (long) source_p->tsinfo);
-			sendto_server(client_p, NULL, NOCAPS, CAP_TS6, ":%s NICK %s :%ld",
-					source_p->name, nick, (long) source_p->tsinfo);
 		}
 	}
 
@@ -901,7 +846,7 @@ perform_nick_collides(struct Client *source_p, struct Client *client_p,
 	/* if we dont have a ts, or their TS's are the same, kill both */
 	if(!newts || !target_p->tsinfo || (newts == target_p->tsinfo))
 	{
-		sendto_realops_snomask(SNO_GENERAL, L_ALL,
+		sendto_realops_snomask(SNO_SKILL, L_ALL,
 				     "Nick collision on %s(%s <- %s)(both %s)",
 				     target_p->name, target_p->from->name, client_p->name, action);
 
@@ -964,12 +909,12 @@ perform_nick_collides(struct Client *source_p, struct Client *client_p,
 		else
 		{
 			if(sameuser)
-				sendto_realops_snomask(SNO_GENERAL, L_ALL,
+				sendto_realops_snomask(SNO_SKILL, L_ALL,
 						     "Nick collision on %s(%s <- %s)(older %s)",
 						     target_p->name, target_p->from->name,
 						     client_p->name, action);
 			else
-				sendto_realops_snomask(SNO_GENERAL, L_ALL,
+				sendto_realops_snomask(SNO_SKILL, L_ALL,
 						     "Nick collision on %s(%s <- %s)(newer %s)",
 						     target_p->name, target_p->from->name,
 						     client_p->name, action);
@@ -993,7 +938,7 @@ perform_nick_collides(struct Client *source_p, struct Client *client_p,
 				(void) exit_client(client_p, target_p, &me, "Nick collision");
 			}
 
-			register_client(client_p, parc >= 10 ? source_p : NULL,
+			register_client(client_p, source_p,
 					nick, newts, parc, parv);
 
 			return 0;
@@ -1018,7 +963,7 @@ perform_nickchange_collides(struct Client *source_p, struct Client *client_p,
 	/* its a client changing nick and causing a collide */
 	if(!newts || !target_p->tsinfo || (newts == target_p->tsinfo) || !source_p->user)
 	{
-		sendto_realops_snomask(SNO_GENERAL, L_ALL,
+		sendto_realops_snomask(SNO_SKILL, L_ALL,
 				     "Nick change collision from %s to %s(%s <- %s)(both %s)",
 				     source_p->name, target_p->name, target_p->from->name,
 				     client_p->name, action);
@@ -1061,12 +1006,12 @@ perform_nickchange_collides(struct Client *source_p, struct Client *client_p,
 		   (!sameuser && newts > target_p->tsinfo))
 		{
 			if(sameuser)
-				sendto_realops_snomask(SNO_GENERAL, L_ALL,
+				sendto_realops_snomask(SNO_SKILL, L_ALL,
 						     "Nick change collision from %s to %s(%s <- %s)(older %s)",
 						     source_p->name, target_p->name,
 						     target_p->from->name, client_p->name, action);
 			else
-				sendto_realops_snomask(SNO_GENERAL, L_ALL,
+				sendto_realops_snomask(SNO_SKILL, L_ALL,
 						     "Nick change collision from %s to %s(%s <- %s)(newer %s)",
 						     source_p->name, target_p->name,
 						     target_p->from->name, client_p->name, action);
@@ -1106,12 +1051,12 @@ perform_nickchange_collides(struct Client *source_p, struct Client *client_p,
 		else
 		{
 			if(sameuser)
-				sendto_realops_snomask(SNO_GENERAL, L_ALL,
+				sendto_realops_snomask(SNO_SKILL, L_ALL,
 						     "Nick collision on %s(%s <- %s)(older %s)",
 						     target_p->name, target_p->from->name,
 						     client_p->name, action);
 			else
-				sendto_realops_snomask(SNO_GENERAL, L_ALL,
+				sendto_realops_snomask(SNO_SKILL, L_ALL,
 						     "Nick collision on %s(%s <- %s)(newer %s)",
 						     target_p->name, target_p->from->name,
 						     client_p->name, action);
@@ -1152,19 +1097,6 @@ register_client(struct Client *client_p, struct Client *server,
 	const char *m;
 	int flag;
 
-	if(server == NULL)
-	{
-		if((server = find_server(NULL, parv[7])) == NULL)
-		{
-			sendto_realops_snomask(SNO_GENERAL, L_ALL,
-					     "Ghost killed: %s on invalid server %s",
-					     nick, parv[7]);
-			sendto_one(client_p, ":%s KILL %s :%s (Server doesn't exist)",
-					get_id(&me, client_p), nick, me.name);
-			return 0;
-		}
-	}
-
 	source_p = make_client(client_p);
 	user = make_user(source_p);
 	rb_dlinkAddTail(source_p, &source_p->node, &global_client_list);
@@ -1201,7 +1133,7 @@ register_client(struct Client *client_p, struct Client *server,
 	}
 	else
 	{
-		rb_strlcpy(source_p->info, parv[8], sizeof(source_p->info));
+		s_assert(0);
 	}
 
 	/* remove any nd entries for this nick */
@@ -1262,23 +1194,6 @@ register_client(struct Client *client_p, struct Client *server,
 
 	rb_dlinkAdd(source_p, &source_p->lnode, &source_p->servptr->serv->users);
 
-	/* fake direction */
-	if(source_p->servptr->from != source_p->from)
-	{
-		struct Client *target_p = source_p->servptr->from;
-
-		sendto_realops_snomask(SNO_DEBUG, L_ALL,
-				     "Bad User [%s] :%s USER %s@%s %s, != %s[%s]",
-				     client_p->name, source_p->name,
-				     source_p->username, source_p->host,
-				     server->name, target_p->name, target_p->from->name);
-		kill_client(client_p, source_p,
-			    "%s (NICK from wrong direction (%s != %s))",
-			    me.name, server->name, target_p->from->name);
-		source_p->flags |= FLAGS_KILLED;
-		return exit_client(source_p, source_p, &me, "USER server wrong direction");
-	}
-
 	call_hook(h_new_remote_user, source_p);
 
 	return (introduce_client(client_p, source_p, user, nick, parc == 12));
@@ -1327,8 +1242,6 @@ save_user(struct Client *client_p, struct Client *source_p,
 			source_p->id, target_p->id, (long)target_p->tsinfo);
 	sendto_server(client_p, NULL, CAP_TS6, CAP_SAVE, ":%s NICK %s :%ld",
 			target_p->id, target_p->id, (long)SAVE_NICKTS);
-	sendto_server(client_p, NULL, NOCAPS, CAP_TS6, ":%s NICK %s :%ld",
-			target_p->name, target_p->id, (long)SAVE_NICKTS);
 	if (!IsMe(client_p))
 		sendto_realops_snomask(SNO_SKILL, L_ALL,
 				"Received SAVE message for %s from %s",
@@ -1354,9 +1267,8 @@ static void bad_nickname(struct Client *client_p, const char *nick)
 	sendto_server(NULL, NULL, CAP_TS6, NOCAPS,
 			":%s WALLOPS :Squitting %s because of bad nickname %s (NICKLEN mismatch?)",
 			me.id, client_p->name, nick);
-	sendto_server(NULL, NULL, NOCAPS, CAP_TS6,
-			":%s WALLOPS :Squitting %s because of bad nickname %s (NICKLEN mismatch?)",
-			me.name, client_p->name, nick);
+	ilog(L_SERVER, "Link %s cancelled, bad nickname %s sent (NICKLEN mismatch?)",
+			client_p->name, nick);
 
 	rb_snprintf(squitreason, sizeof squitreason,
 			"Bad nickname introduced [%s]", nick);