Revision: 447
http://vde.svn.sourceforge.net/vde/?rev=447&view=rev
Author: rd235
Date: 2010-11-20 13:58:58 +0000 (Sat, 20 Nov 2010)
Log Message:
-----------
libvdeplug: point-to-point link support
Modified Paths:
--------------
trunk/vde-2/src/lib/Makefile.am
trunk/vde-2/src/lib/libvdeplug.c
Modified: trunk/vde-2/src/lib/Makefile.am
===================================================================
--- trunk/vde-2/src/lib/Makefile.am 2010-11-16 18:57:03 UTC (rev 446)
+++ trunk/vde-2/src/lib/Makefile.am 2010-11-20 13:58:58 UTC (rev 447)
@@ -23,7 +23,7 @@
libvdemgmt_la_LDFLAGS = $(AM_LDFLAGS) -version-number 0:0:1 -export-dynamic
libvdeplug_la_LIBADD = $(LIBADD)
-libvdeplug_la_LDFLAGS = $(AM_LDFLAGS) -version-number 3:0:1 -export-dynamic
+libvdeplug_la_LDFLAGS = $(AM_LDFLAGS) -version-number 2:2:1 -export-dynamic
libvdehist_la_LIBADD = $(LIBADD)
libvdehist_la_LDFLAGS = $(AM_LDFLAGS) -version-number 0:0:1 -export-dynamic
Modified: trunk/vde-2/src/lib/libvdeplug.c
===================================================================
--- trunk/vde-2/src/lib/libvdeplug.c 2010-11-16 18:57:03 UTC (rev 446)
+++ trunk/vde-2/src/lib/libvdeplug.c 2010-11-20 13:58:58 UTC (rev 447)
@@ -1,6 +1,7 @@
/*
* libvdeplug - A library to connect to a VDE Switch.
* Copyright (C) 2006 Renzo Davoli, University of Bologna
+ * (c) 2010 Renzo Davoli - stream + point2point
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
@@ -94,10 +95,12 @@
int fdctl;
int fddata;
struct sockaddr_un inpath;
+ struct sockaddr_un *outpath;
};
#define SWITCH_MAGIC 0xfeedface
#define MAXDESCR 128
+#define VDEFLAG_P2P_SOCKET 1
enum request_type { REQ_NEW_CONTROL, REQ_NEW_PORT0 };
@@ -122,6 +125,7 @@
char *group=NULL;
mode_t mode=0700;
int sockno=0;
+ int flags=0;
int res;
char *std_sockname=NULL;
char *real_sockname=NULL;
@@ -132,6 +136,8 @@
port=open_args->port;
group=open_args->group;
mode=open_args->mode;
+ if (port == -1)
+ flags |= VDEFLAG_P2P_SOCKET;
}
else {
errno=EINVAL;
@@ -184,7 +190,9 @@
*split=0;
split++;
port=atoi(split);
- if (port == 0)
+ if (*split==']')
+ flags |= VDEFLAG_P2P_SOCKET;
+ else if (port == 0)
req->type = REQ_NEW_PORT0;
if (*given_sockname==0)
given_sockname = NULL;
@@ -195,7 +203,8 @@
* switch (we don't know its cwd) for the data socket. Appending
* given_sockname to getcwd() would be enough, but we could end up with
a
* name longer than PATH_MAX that couldn't be used as sun_path. */
- if (given_sockname && vde_realpath(given_sockname, real_sockname) ==
NULL)
+ if (given_sockname && !(flags & VDEFLAG_P2P_SOCKET) &&
+ vde_realpath(given_sockname, real_sockname) == NULL)
goto abort;
#ifdef USE_IPN
@@ -208,7 +217,8 @@
sockun.sun_family = AF_IPN;
}
#endif
- if((conn->fddata = socket(AF_IPN_STOLEN,SOCK_RAW,IPN_ANY)) >= 0) {
+ if((flags & VDEFLAG_P2P_SOCKET) == 0 &&
+ (conn->fddata = socket(AF_IPN_STOLEN,SOCK_RAW,IPN_ANY))
>= 0) {
/* IPN_STOLEN service exists */
sockun->sun_family = AF_IPN_STOLEN;
if (port != 0 || req->type == REQ_NEW_PORT0)
@@ -245,6 +255,55 @@
close(conn->fddata);
}
#endif
+ /* define a female socket for point2point connection */
+ if (flags & VDEFLAG_P2P_SOCKET) {
+ struct stat sockstat;
+ if(given_sockname == NULL) {
+ errno = EINVAL;
+ goto abort;
+ }
+ strcpy(sockname,given_sockname); /* XXX canonicalize should be
better */
+ if((conn->fddata = socket(AF_UNIX, SOCK_DGRAM, 0)) < 0)
+ goto abort;
+ sockun->sun_family = AF_UNIX;
+ memset(sockun->sun_path,0,sizeof(sockun->sun_path));
+ snprintf(sockun->sun_path, sizeof(sockun->sun_path)-1, "%s",
sockname);
+ /* the socket already exists */
+ if(stat(sockun->sun_path,&sockstat) == 0) {
+ if (S_ISSOCK(sockstat.st_mode)) {
+ /* the socket is already in use */
+ res = connect(conn->fddata, (struct sockaddr *)
sockun, sizeof(*sockun));
+ if (res >= 0) {
+ errno = EADDRINUSE;
+ goto abort;
+ }
+ if (errno == ECONNREFUSED)
+ unlink(sockun->sun_path);
+ }
+ }
+ res = bind(conn->fddata, (struct sockaddr *) sockun,
sizeof(*sockun));
+ if (res < 0)
+ goto abort;
+ memcpy(&(conn->inpath),sockun,sizeof(conn->inpath));
+ conn->outpath = calloc(1,sizeof(struct sockaddr_un));
+ if (conn->outpath==NULL)
+ goto abort;
+ conn->outpath->sun_family = AF_UNIX;
+ snprintf(conn->outpath->sun_path, sizeof(sockun->sun_path),
"%s+", sockname);
+ if (!conn->outpath)
+ goto abort;
+ if (group) {
+ struct group *gs;
+ gid_t gid;
+ if ((gs=getgrnam(group)) == NULL)
+ gid=atoi(group);
+ else
+ gid=gs->gr_gid;
+ chown(conn->inpath.sun_path,-1,gid);
+ }
+ chmod(conn->inpath.sun_path,mode);
+ goto cleanup;
+ }
if((conn->fdctl = socket(AF_UNIX, SOCK_STREAM, 0)) < 0)
goto abort;
if((conn->fddata = socket(AF_UNIX, SOCK_DGRAM, 0)) < 0)
@@ -276,8 +335,46 @@
}
}
- if (res != 0)
- goto abort;
+ if (res != 0) {
+ struct stat sockstat;
+ /* define a male plug for point2point connection */
+ if (!given_sockname)
+ goto abort;
+ snprintf(sockun->sun_path, sizeof(sockun->sun_path), "%s",
sockname);
+ res = connect(conn->fddata, (struct sockaddr *) sockun,
sizeof(*sockun));
+ if (res < 0)
+ goto abort;
+ snprintf(sockun->sun_path, sizeof(sockun->sun_path), "%s+",
sockname);
+ if(stat(sockun->sun_path,&sockstat) == 0) {
+ if (S_ISSOCK(sockstat.st_mode)) {
+ /* the socket is already in use */
+ res = connect(conn->fddata, (struct sockaddr *)
sockun, sizeof(*sockun));
+ if (res >= 0) {
+ errno = EADDRINUSE;
+ goto abort;
+ }
+ if (errno == ECONNREFUSED)
+ unlink(sockun->sun_path);
+ }
+ }
+ res = bind(conn->fddata, (struct sockaddr *) sockun,
sizeof(*sockun));
+ if (res < 0)
+ goto abort;
+ memcpy(&(conn->inpath),sockun,sizeof(conn->inpath));
+ if (group) {
+ struct group *gs;
+ gid_t gid;
+ if ((gs=getgrnam(group)) == NULL)
+ gid=atoi(group);
+ else
+ gid=gs->gr_gid;
+ chown(conn->inpath.sun_path,-1,gid);
+ }
+ chmod(conn->inpath.sun_path,mode);
+ close(conn->fdctl);
+ conn->fdctl=-1;
+ goto cleanup;
+ }
req->magic=SWITCH_MAGIC;
req->version=3;
@@ -376,6 +473,8 @@
close(conn->fddata);
if (*(conn->inpath.sun_path))
unlink(conn->inpath.sun_path);
+ if (conn->outpath != NULL)
+ free(conn->outpath);
free(conn);
}
conn = NULL;
@@ -402,9 +501,13 @@
ssize_t vde_send(VDECONN *conn,const void *buf,size_t len,int flags)
{
- if (__builtin_expect(conn!=0,1))
- return send(conn->fddata,buf,len,0);
- else {
+ if (__builtin_expect(conn!=0,1)) {
+ if (__builtin_expect(conn->outpath == NULL,1))
+ return send(conn->fddata,buf,len,0);
+ else
+ return sendto(conn->fddata,buf,len,0,
+ (struct sockaddr
*)conn->outpath,sizeof(conn->inpath));
+ } else {
errno=EBADF;
return -1;
}
@@ -435,6 +538,8 @@
if (__builtin_expect(conn!=0,1)) {
if (*(conn->inpath.sun_path))
unlink(conn->inpath.sun_path);
+ if (conn->outpath != NULL)
+ free(conn->outpath);
close(conn->fddata);
close(conn->fdctl);
free(conn);
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