New package redir

This patch adds a new package "redir" that allows to redirect incoming
TCP connections to a specific destination in a proxy-like way.


git-svn-id: svn://svn.openwrt.org/openwrt/packages@15686 3c298f89-4303-0410-b956-a3cf2f4a3e73

net/redir/Makefile

@@ -0,0 +1,35 @@
+# Copyright (C) 2009 OpenWrt.org
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=redir
+PKG_VERSION:=2.2.1
+PKG_RELEASE:=1
+
+PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
+PKG_SOURCE_URL:=http://sammy.net/~sammy/hacks
+PKG_MD5SUM:=4342fadac30504c86c8db7beefe01995
+
+include $(INCLUDE_DIR)/package.mk
+
+define Package/redir
+	SECTION:=net
+	CATEGORY:=Network
+	TITLE=Redirect TCP connections
+	URL:=http://sammy.net/~sammy/hacks
+endef
+
+define Package/redir/description
+ A port redirector, used to forward incoming connections to somewhere else.
+endef
+
+define Package/redir/install
+	$(INSTALL_DIR) $(1)/usr/bin
+	$(INSTALL_BIN) $(PKG_BUILD_DIR)/redir $(1)/usr/bin/
+endef
+
+$(eval $(call BuildPackage,redir))

net/redir/patches/00_honor_copts.patch

@@ -0,0 +1,12 @@
+diff -ruN a/Makefile b/Makefile
+--- a/Makefile	2009-05-07 14:31:14.000000000 +0100
++++ b/Makefile	2009-05-07 14:31:47.000000000 +0100
+@@ -32,7 +32,7 @@
+ # if your system lacks getopt_long, remove the comment from this line
+ OBJS = redir.o $(GETOPT_OBJS)
+ 
+-CFLAGS = -O2 -Wall $(STR_CFLAGS) $(WRAP_CFLAGS) $(EXTRA_CFLAGS)
++CFLAGS += -Wall $(STR_CFLAGS) $(WRAP_CFLAGS) $(EXTRA_CFLAGS)
+ LDFLAGS = -s
+ 
+ # solaris, and others, may also need these libraries to link

net/redir/patches/01_fix_max_bandwidth_docs.patch

@@ -0,0 +1,54 @@
+diff -Nur a/redir.c b/redir.c
+--- a/redir.c	1999-12-26 15:50:06.000000000 -0500
++++ b/redir.c	2005-10-22 21:21:56.849499952 -0400
+@@ -233,7 +233,7 @@
+ #ifndef NO_SHAPER
+         /* options for bandwidth */
+         fprintf(stderr, "\t\t--bufsize=<octets>\tsize of the buffer\n");
+-        fprintf(stderr, "\t\t--maxbandwidth=<bit-per-sec>\tlimit the bandwidth\n");
++        fprintf(stderr, "\t\t--max_bandwidth=<bit-per-sec>\tlimit the bandwidth\n");
+         fprintf(stderr, "\t\t--random_wait=<millisec>\twait before each packet\n");
+         fprintf(stderr, "\t\t--wait_in_out=<flag>\t1 wait for in, 2 out, 3 in&out\n");
+         /* end options for bandwidth */
+diff -urNad redir-2.2.1~/redir.man redir-2.2.1/redir.man
+--- redir-2.2.1~/redir.man	1999-12-26 15:52:24.000000000 -0500
++++ redir-2.2.1/redir.man	2005-10-22 21:22:28.882630176 -0400
+@@ -18,7 +18,7 @@
+ .I --lport=port
+ .I --cport=port
+ .RB [ \--bufsize=n ]
+-.RB [ \--maxbandwidth=n ]
++.RB [ \--max_bandwidth=n ]
+ .RB [ \--random_wait=n ]
+ .RB [ \--wait_in_out=n ]
+ .ll -8
+@@ -35,7 +35,7 @@
+ .RB [ \--connect=host:port ]
+ .I --cport=port
+ .RB [ \--bufsize=n ]
+-.RB [ \--maxbandwidth=n ]
++.RB [ \--max_bandwidth=n ]
+ .RB [ \--random_wait=n ]
+ .RB [ \--wait_in_out=n ]
+ .ll -8
+@@ -102,9 +102,9 @@
+ .TP
+ .B \--bufsize n
+ Set the bufsize (defaut 4096) in bytes. Can be used combined with
+---maxbandwidth or --random_wait to simulate a slow connection.
++--max_bandwidth or --random_wait to simulate a slow connection.
+ .TP
+-.B \--maxbandwidth n
++.B \--max_bandwidth n
+ Reduce the bandwidth to be no more than n bits/sec.  The algorithme is
+ basic, the goal is to simulate a slow connection, so there is no pic
+ acceptance.
+@@ -115,7 +115,7 @@
+ than the bufsize (see also --bufsize).
+ .TP
+ .B \--wait_in_out n
+-Apply --maxbandwidth and --random_wait for input if n=1, output if n=2 and
++Apply --max_bandwidth and --random_wait for input if n=1, output if n=2 and
+ both if n=3.
+ .SH "SEE ALSO"
+ inetd(1)

net/redir/patches/02_use_ntohs.patch

@@ -0,0 +1,43 @@
+diff -Nur a/redir.c b/redir.c
+--- a/redir.c	1999-12-26 15:50:06.000000000 -0500
++++ b/redir.c	2005-10-22 21:29:55.491735272 -0400
+@@ -745,7 +745,7 @@
+ 	}
+      
+ 	debug1("peer IP is %s\n", inet_ntoa(client.sin_addr));
+-	debug1("peer socket is %d\n", client.sin_port);
++	debug1("peer socket is %d\n", ntohs(client.sin_port));
+ 
+ 	/*
+ 	 * Double fork here so we don't have to wait later
+@@ -871,8 +871,8 @@
+ 		strcpy(tmp2, inet_ntoa(target->sin_addr));
+ 	  
+ 		syslog(LOG_NOTICE, "connecting %s/%d to %s/%d",
+-		       tmp1, client.sin_port,
+-		       tmp2, target->sin_port);
++		       tmp1, ntohs(client.sin_port),
++		       tmp2, ntohs(target->sin_port));
+ 	}
+ 
+ 	/* do proxy stuff */
+@@ -1066,7 +1066,7 @@
+ 
+ 		if (!getpeername(0, (struct sockaddr *) &client, &client_size)) {
+ 			debug1("peer IP is %s\n", inet_ntoa(client.sin_addr));
+-			debug1("peer socket is %d\n", client.sin_port);
++			debug1("peer socket is %d\n", ntohs(client.sin_port));
+ 		}
+ 		if ((targetsock = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
+ 			perror("target: socket");
+@@ -1109,8 +1109,8 @@
+ 
+ 		if (dosyslog) {
+ 			syslog(LOG_NOTICE, "connecting %s/%d to %s/%d",
+-			       inet_ntoa(client.sin_addr), client.sin_port,
+-			       target_ip, target.sin_port);
++			       inet_ntoa(client.sin_addr), ntohs(client.sin_port),
++			       target_ip, ntohs(target.sin_port));
+ 		}
+ 
+ 		/* Just start copying - one side of the loop is stdin - 0 */

net/redir/patches/03_fix_tcp_wrappers.patch

@@ -0,0 +1,25 @@
+diff -Nur a/redir.c b/redir.c
+--- a/redir.c	2005-10-22 22:10:11.439455392 -0400
++++ b/redir.c	2005-10-22 22:10:51.625346208 -0400
+@@ -802,8 +802,8 @@
+ #ifdef USE_TCP_WRAPPERS
+ 	request_init(&request, RQ_DAEMON, ident, RQ_FILE, clisock, 0);
+ 	sock_host(&request);
+-	sock_hostname(&request);
+-	sock_hostaddr(&request);
++	sock_hostname(request.client);
++	sock_hostaddr(request.client);
+ 
+ 	if (!hosts_access(&request)) {
+ 		refuse(&request);
+@@ -1057,8 +1057,8 @@
+ #ifdef USE_TCP_WRAPPERS
+ 		request_init(&request, RQ_DAEMON, ident, RQ_FILE, 0, 0);
+ 		sock_host(&request);
+-		sock_hostname(&request);
+-		sock_hostaddr(&request);
++		sock_hostname(request.client);
++		sock_hostaddr(request.client);
+ 	
+ 		if (!hosts_access(&request))
+ 			refuse(&request);

net/redir/patches/04_fix_timeouts.patch

@@ -0,0 +1,38 @@
+diff -Nur a/redir.c b/redir.c
+--- a/redir.c	2005-10-22 22:44:39.504061784 -0400
++++ b/redir.c	2005-10-22 22:47:14.746461352 -0400
+@@ -598,10 +598,6 @@
+ 	/* Record start time */
+ 	start_time = (unsigned int) time(NULL);
+ 
+-	/* Set up timeout */
+-	timeout.tv_sec = timeout_secs;
+-	timeout.tv_usec = 0;
+-
+ 	/* file descriptor bits */
+ 	FD_ZERO(&iofds);
+ 	FD_SET(insock, &iofds);
+@@ -618,14 +614,21 @@
+ 	while(1) {
+ 		(void) memcpy(&c_iofds, &iofds, sizeof(iofds));
+ 
++		/* Set up timeout, Linux returns seconds left in this structure
++		 * so we have to reset it before each select(). */
++		timeout.tv_sec = timeout_secs;
++		timeout.tv_usec = 0;
++
+ 
+ 		if (select(max_fd + 1,
+ 			   &c_iofds,
+ 			   (fd_set *)0,
+ 			   (fd_set *)0,
+ 			   (timeout_secs ? &timeout : NULL)) <= 0) {
+-			/*	    syslog(LLEV,"connection timeout: %d sec",timeout.tv_sec);*/
+-			break;
++		  if (dosyslog) {
++		    syslog(LOG_NOTICE,"connection timeout: %d sec",timeout_secs);
++		  }
++		  break;
+ 		}
+ 
+ 		if(FD_ISSET(insock, &c_iofds)) {

net/redir/patches/06_fix_shaper_buffer.patch

@@ -0,0 +1,56 @@
+diff -Nur a/redir.c b/redir.c
+--- a/redir.c	2005-10-22 23:20:05.235901424 -0400
++++ b/redir.c	2005-10-22 23:22:20.198384008 -0400
+@@ -259,7 +259,7 @@
+ #endif
+ 	   int *transproxy,
+ #ifndef NO_SHAPER
+-           unsigned int * bufsize,
++           unsigned int * bufsizeout,
+            int * max_bandwidth,
+            int * random_wait,
+            int * wait_in_out,
+@@ -366,7 +366,7 @@
+ 
+ #ifndef NO_SHAPER
+                 case 'z':
+-                  *bufsize = (unsigned int)atol(optarg);
++                  *bufsizeout = (unsigned int)atol(optarg);
+                   break;
+  
+                 case 'm':
+@@ -593,7 +593,7 @@
+ 	unsigned long bytes_in = 0;
+ 	unsigned long bytes_out = 0;
+ 	unsigned int start_time, end_time;
+-	char buf[bufsize];
++	char* buf = malloc(bufsize);
+ 
+ 	/* Record start time */
+ 	start_time = (unsigned int) time(NULL);
+@@ -632,7 +632,7 @@
+ 		}
+ 
+ 		if(FD_ISSET(insock, &c_iofds)) {
+-			if((bytes = read(insock, buf, sizeof(buf))) <= 0)
++			if((bytes = read(insock, buf, bufsize)) <= 0)
+ 				break;
+ #ifndef NO_FTP
+ 			if (ftp & FTP_PORT)
+@@ -647,7 +647,7 @@
+ 			bytes_out += bytes;
+ 		}
+ 		if(FD_ISSET(outsock, &c_iofds)) {
+-			if((bytes = read(outsock, buf, sizeof(buf))) <= 0)
++			if((bytes = read(outsock, buf, bufsize)) <= 0)
+ 				break;
+ 			/* if we're correcting for PASV on ftp redirections, then
+ 			   fix buf and bytes to have the new address, among other
+@@ -684,6 +684,7 @@
+ 		syslog(LOG_NOTICE, "disconnect %d secs, %ld in %ld out",
+ 		       (end_time - start_time), bytes_in, bytes_out);
+ 	}
++	free(buf);
+ 	return;
+ }
+