socketbind - new port submission

This library allows you to bind any application which is
	dynamically linked with libc to certain IP address.  It
	provides convient way to bind socket's source IP to one of
	the multiple IP's available on computer.

PR:		ports/50147
Submitted by:	Gaspar Chilingarov <nm@web.am>

net/Makefile

@@ -588,6 +588,7 @@
     SUBDIR += sniffit
     SUBDIR += sntop
     SUBDIR += socat
+    SUBDIR += socketbind
     SUBDIR += socks5
     SUBDIR += spread
     SUBDIR += ssldump

net/socketbind/Makefile

@@ -0,0 +1,37 @@
+# New ports collection makefile for:    socketbind
+# Date created:         		20 Mar 2003
+# Whom:                 		Gaspar Chilingarov <nm@web.am>
+#
+# $FreeBSD$
+#
+
+PORTNAME=	socketbind
+PORTVERSION=	1
+CATEGORIES=	net
+MASTER_SITES=	# none
+DISTFILES=	# none
+
+MAINTAINER=	nm@web.am
+COMMENT=	Library to bind applications on multihomed machines to specefic IP address
+
+INSTALLS_SHLIB=	YES
+NOMAN=		YES
+INSTALL_TARGET=
+PLIST_SUB=	"DOCSDIR=share/doc/${PORTNAME}"
+
+post-extract:
+	${MKDIR} ${WRKSRC}
+	${CP} -R ${PATCHDIR}/ ${WRKSRC}
+
+pre-install:
+	${INSTALL_PROGRAM} ${WRKSRC}/libsocketbind.so.1 ${PREFIX}/lib
+	${LN} -s ${PREFIX}/lib/libsocketbind.so.1 ${PREFIX}/lib/libsocketbind.so
+	${MKDIR} ${DOCSDIR}
+	${ECHO} "This library allows to bind arbitrary program, " >> ${DOCSDIR}/README
+	${ECHO} "which is dynamically linked to libc.so." >> ${DOCSDIR}/README
+	${ECHO} "Load library before your program (set environment " >> ${DOCSDIR}/README
+	${ECHO} "variable LD_PRELOAD=${PREFIX}/lib/libsocketbind.so.1) " >> ${DOCSDIR}/README
+	${ECHO} "and set address to bind to (set environment variable " >> ${DOCSDIR}/README
+	${ECHO} "BINDTO=ip address to bind)" >> ${DOCSDIR}/README
+
+.include <bsd.port.mk>

net/socketbind/files/Makefile

@@ -0,0 +1,11 @@
+# $FreeBSD$
+LIB=socketbind
+SHLIB_MAJOR=1
+
+DESTDIR=/usr/local
+SRCS=socketbind.c
+NOMAN=YES
+#DEBUG_FLAGS=-DDEBUG
+
+
+.include <bsd.lib.mk>

net/socketbind/files/socketbind.c

@@ -0,0 +1,46 @@
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <dlfcn.h>
+
+static void *socket_p, *dl_handle;
+
+static struct sockaddr_in bind_addr;
+static int	   do_bind;
+
+int socket(int domain, int type, int protocol) {
+	auto int res;
+	if (dl_handle == NULL) {
+		char *str;
+		dl_handle = dlopen("/usr/lib/libc.so", RTLD_LAZY);
+		if (dl_handle == NULL) 
+			return -1;
+		socket_p = dlsym(dl_handle, "socket");
+		if (!socket_p)
+			return -1;
+#ifdef DEBUG
+		printf("Loaded socket %x\n", socket_p);
+#endif
+
+		if ((str = getenv("BINDTO")) != NULL) {
+#ifdef DEBUG
+			printf("Thinking about bind\n");
+#endif
+			if (ascii2addr(AF_INET, str, &bind_addr.sin_addr)) {
+				do_bind = 1;
+				bind_addr.sin_len = INET_ADDRSTRLEN;
+				bind_addr.sin_family = AF_INET;
+#ifdef DEBUG
+				printf("WILL DO BIND %s, %x\n", str, bind_addr.sin_addr.s_addr);
+#endif
+			}
+		}
+	}
+	res = ((int(*)(int a, int b, int c))socket_p)(domain, type, protocol); 
+	if (do_bind) {
+		bind(res, (struct sockaddr*)&bind_addr, INET_ADDRSTRLEN);
+	}
+	return res;
+};
+

net/socketbind/pkg-descr

@@ -0,0 +1,11 @@
+This library allows you to bind any application which is dynamically linked
+with libc. It provides convient way to bind socket's source IP to one of the
+multiple IP's available on computer.
+
+To use it first of all point LD_PRELOAD to installed library and set BINDTO
+variable to desired IP address to bind.
+
+Here is the wrapper to run any command binded to some IP address:
+env LD_PRELOAD=/usr/local/lib/libsocketbind.so.1 BINDTO=$MY_IP_ADDRESS $*
+
+Author can be reached at "nm at web dot am" address.

net/socketbind/pkg-plist

@@ -0,0 +1,4 @@
+lib/libsocketbind.so.1
+lib/libsocketbind.so
+%%DOCSDIR%%/README
+@dirrm %%DOCSDIR%%