Added clif->packet() to retrieve info about a packet.

- As per Malufett/Michieru request, in order to make it possible for a
  plugin to obtain information about a packet.

Signed-off-by: Haru <haru@dotalux.com>

3 files changed, 19 insertions, 9 deletions

diff --git a/src/map/atcommand.c b/src/map/atcommand.c
index 37f50dc5e..15422a74a 100644
--- a/src/map/atcommand.c
+++ b/src/map/atcommand.c
@@ -242,16 +242,16 @@ ACMD(send)
 	}\
 } while(0) //define GET_VALUE
 
-	if (type > 0 && type < MAX_PACKET_DB) {
+	if (type >= MIN_PACKET_DB && type <= MAX_PACKET_DB) {
 		int off = 2;
 		if (len) {
 			// show packet length
-			safesnprintf(atcmd_output, sizeof(atcmd_output), msg_fd(fd,904), type, packet_db[type].len); // Packet 0x%x length: %d
+			safesnprintf(atcmd_output, sizeof(atcmd_output), msg_fd(fd,904), type, clif->packet(type)->len); // Packet 0x%x length: %d
 			clif->message(fd, atcmd_output);
 			return true;
 		}
 
-		len=packet_db[type].len;
+		len = clif->packet(type)->len;
 		if (len == 0) {
 			// unknown packet - ERROR
 			safesnprintf(atcmd_output, sizeof(atcmd_output), msg_fd(fd,905), type); // Unknown packet: 0x%x
@@ -402,7 +402,7 @@ ACMD(send)
 			SKIP_VALUE(message);
 		}
 
-		if(packet_db[type].len == -1) {// send dynamic packet
+		if (clif->packet(type)->len == -1) { // send dynamic packet
 			WFIFOW(sd->fd,2)=TOW(off);
 			WFIFOSET(sd->fd,off);
 		} else {// send static packet
diff --git a/src/map/clif.c b/src/map/clif.c
index 243aa6a43..59c8a7197 100644
--- a/src/map/clif.c
+++ b/src/map/clif.c
@@ -18680,6 +18680,19 @@ int clif_parse(int fd) {
 	return 0;
 }
 
+/**
+ * Returns information about the given packet ID.
+ *
+ * @param packet_id The packet ID.
+ * @return The corresponding packet_db entry, if any.
+ */
+const struct s_packet_db *clif_packet(int packet_id)
+{
+	if (packet_id < MIN_PACKET_DB || packet_id > MAX_PACKET_DB || packet_db[packet_id].len == 0)
+		return NULL;
+	return &packet_db[packet_id];
+}
+
 static void __attribute__ ((unused)) packetdb_addpacket(short cmd, int len, ...) {
 	va_list va;
 	int i;
@@ -18815,6 +18828,7 @@ void clif_defaults(void) {
 	clif->parse = clif_parse;
 	clif->parse_cmd = clif_parse_cmd_optional;
 	clif->decrypt_cmd = clif_decrypt_cmd;
+	clif->packet = clif_packet;
 	/* auth */
 	clif->authok = clif_authok;
 	clif->authrefuse = clif_authrefuse;
diff --git a/src/map/clif.h b/src/map/clif.h
index f6f0d4fe7..40610b7c1 100644
--- a/src/map/clif.h
+++ b/src/map/clif.h
@@ -597,6 +597,7 @@ struct clif_interface {
 	int (*send_sub) (struct block_list *bl, va_list ap);
 	int (*send_actual) (int fd, void *buf, int len);
 	int (*parse) (int fd);
+	const struct s_packet_db *(*packet) (int packet_id);
 	unsigned short (*parse_cmd) ( int fd, struct map_session_data *sd );
 	unsigned short (*decrypt_cmd) ( int cmd, struct map_session_data *sd );
 	/* auth */
@@ -1323,11 +1324,6 @@ struct clif_interface {
 };
 
 #ifdef HERCULES_CORE
-/**
- * Vars
- **/
-extern struct s_packet_db packet_db[MAX_PACKET_DB + 1];
-
 void clif_defaults(void);
 #endif // HERCULES_CORE