power smash ppp server. iptables rules for culdcept2 and power smash

pppd server for power smash on port 7656 (PAP authentication, disable
LCP echo)
iptables DNAT wildcard for most iwango servers and Power Smash.

Author: flyinghead

Makefile

@@ -45,6 +45,7 @@ clean:
 
 createservice:
 	cp pppd.socket pppd@.service ethtap.service discoping.service iptables-dcnet.service /usr/lib/systemd/system/
+	cp psmash-pppd.socket psmash-pppd@.service /usr/lib/systemd/system/
 	sed -i -e "s:/usr/local/sbin/:$(sbindir)/:g" /usr/lib/systemd/system/discoping.service
 	sed -i -e "s:/usr/local/sbin/:$(sbindir)/:g" /usr/lib/systemd/system/ethtap.service
 	sed -i -e "s:/usr/local/sbin/:$(sbindir)/:g" /usr/lib/systemd/system/iptables-dcnet.service
@@ -56,8 +57,10 @@ createservice:
 	systemctl restart discoping.service
 	systemctl enable iptables-dcnet.service
 	systemctl restart iptables-dcnet.service
+	systemctl enable psmash-pppd.socket
+	systemctl restart psmash-pppd.socket
 
 archive:
 	tar cvzf dcnet-ap.tar.gz Makefile ppp-ipaddr.c ethtap.cpp discoping.c dcnetbba.cpp \
 		pppd.socket pppd@.service ethtap.service dnsmasq-ethtap.conf options.dcnet discoping.service \
-		accesspoints iptables-dcnet.service iptables-dcnet
+		accesspoints iptables-dcnet.service iptables-dcnet psmash-pppd.socket psmash-pppd@.service options.psmash

accesspoints

@@ -1,2 +1,3 @@
 dcnet.flyca.st "US Central"
 dcnet-eu.flyca.st Europe
+hmnetbrasil.duckdns.org "South America"

discoping.c

@@ -28,6 +28,7 @@
 #include <netdb.h>
 #include <ctype.h>
 #include <poll.h>
+#include <time.h>
 
 const uint32_t MAGIC = 0xDC15C001;
 #define PING 1
@@ -58,6 +59,15 @@ void error(const char *str)
   exit(1);
 }
 
+static const char *getDate()
+{
+	time_t now;
+	time(&now);
+	char *nowstr = ctime(&now);
+	nowstr[strlen(nowstr) - 1] = '\0';
+	return nowstr;
+}
+
 void pong(struct sockaddr_in *addr, const uint8_t *data, size_t len)
 {
 	uint8_t resp[13];
@@ -82,11 +92,11 @@ uint32_t resolve(const char *servname)
 	struct addrinfo *result;
 	int rc = getaddrinfo(servname, NULL, &hints, &result);
 	if (rc != 0) {
-		fprintf(stderr, "%s: DNS failure: %s\n", servname, gai_strerror(rc));
+		fprintf(stderr, "[%s] %s: DNS failure: %s\n", getDate(), servname, gai_strerror(rc));
 		return 0;
 	}
 	if (result == NULL) {
-		fprintf(stderr, "%s: DNS failure: no record found\n", servname);
+		fprintf(stderr, "[%s] %s: DNS failure: no record found\n", getDate(), servname);
 		return 0;
 	}
 	char ip[INET_ADDRSTRLEN];
@@ -238,7 +248,7 @@ int pingAccessPoints(int sockfd, int force)
 			if (ap->pingCount == 5)
 			{
 				if (ap->offline == 0)
-					fprintf(stderr, "Access point \"%s\" is offline\n", ap->name);
+					fprintf(stderr, "[%s] Access point \"%s\" is offline\n", getDate(), ap->name);
 				ap->offline = 1;
 				continue;
 			}
@@ -276,7 +286,7 @@ void apPong(struct sockaddr_in *addr, const uint8_t *data, size_t len)
 		ap->lastPing = 0;
 		ap->pingCount = 0;
 		if (ap->offline == 1)
-			fprintf(stderr, "Access point \"%s\" is back online\n", ap->name);
+			fprintf(stderr, "[%s] Access point \"%s\" is back online\n", getDate(), ap->name);
 		ap->offline = 0;
 		return;
 	}
@@ -303,7 +313,7 @@ int main(int argc, char *argv[])
 	    if (argc > 2)
 	    	accessPointsFile = argv[2];
 	}
-    printf("Started discoping on port %d with list %s\n", port, accessPointsFile);
+    printf("[%s] Started discoping on port %d with list %s\n", getDate(), port, accessPointsFile);
     refresh();
 	sockfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
 	if (sockfd < 0)

iptables-dcnet

@@ -38,14 +38,10 @@ if ! iptables -t nat -F DCNET_PRERT 2>/dev/null; then
 fi
 # Internet Game Pack
 iptables -t nat -A DCNET_PRERT -d 204.210.43.239/32 -p tcp -j DNAT --to-destination 172.20.0.1
-# Daytona USA (JP), Golf Shiyou Yo 2
-iptables -t nat -A DCNET_PRERT -d 203.179.41.127/32 -p tcp -j DNAT --to-destination 172.20.0.1
-# Sega Tetris
-iptables -t nat -A DCNET_PRERT -d 203.179.41.98/32 -p tcp -j DNAT --to-destination 172.20.0.1
-# Aero Dancing
-iptables -t nat -A DCNET_PRERT -d 203.179.41.170/32 -p tcp -j DNAT --to-destination 172.20.0.1
-# Hundred Swords
-iptables -t nat -A DCNET_PRERT -d 203.179.41.126/32 -p tcp -j DNAT --to-destination 172.20.0.1
+# IWANGO games
+iptables -t nat -A DCNET_PRERT -d 203.179.41.0/24 -p tcp -j DNAT --to-destination 172.20.0.1
+# Power Smash
+iptables -t nat -A DCNET_PRERT -d 172.17.18.2/32 -p tcp -j DNAT --to-destination 172.20.0.1
 # Toy Racer (BBA)
 iptables -t nat -A DCNET_PRERT -d 24.233.108.248/32 -j DNAT --to-destination 172.20.0.1
 # redirect dcnet.flyca.st external IP to internal for dcnet users