Import sources from 2011-03-30 iso image

1 files changed, 133 insertions, 0 deletions

diff --git a/sys/src/libc/9sys/getnetconninfo.c b/sys/src/libc/9sys/getnetconninfo.c
new file mode 100755
index 000000000..8dbb95f89
--- /dev/null
+++ b/sys/src/libc/9sys/getnetconninfo.c
@@ -0,0 +1,133 @@
+#include <u.h>
+#include <libc.h>
+
+static char *unknown = "???";
+
+static void
+getendpoint(char *dir, char *file, char **sysp, char **servp)
+{
+	int fd, n;
+	char buf[128];
+	char *sys, *serv;
+
+	sys = serv = 0;
+
+	snprint(buf, sizeof buf, "%s/%s", dir, file);
+	fd = open(buf, OREAD);
+	if(fd >= 0){
+		n = read(fd, buf, sizeof(buf)-1);
+		if(n>0){
+			buf[n-1] = 0;
+			serv = strchr(buf, '!');
+			if(serv){
+				*serv++ = 0;
+				serv = strdup(serv);
+			}
+			sys = strdup(buf);
+		}
+		close(fd);
+	}
+	if(serv == 0)
+		serv = unknown;
+	if(sys == 0)
+		sys = unknown;
+	*servp = serv;
+	*sysp = sys;
+}
+
+NetConnInfo*
+getnetconninfo(char *dir, int fd)
+{
+	NetConnInfo *nci;
+	char *cp;
+	Dir *d;
+	char spec[10];
+	char path[128];
+	char netname[128], *p;
+
+	/* get a directory address via fd */
+	if(dir == nil || *dir == 0){
+		if(fd2path(fd, path, sizeof(path)) < 0)
+			return nil;
+		cp = strrchr(path, '/');
+		if(cp == nil)
+			return nil;
+		*cp = 0;
+		dir = path;
+	}
+
+	nci = mallocz(sizeof *nci, 1);
+	if(nci == nil)
+		return nil;
+
+	/* copy connection directory */
+	nci->dir = strdup(dir);
+	if(nci->dir == nil)
+		goto err;
+
+	/* get netroot */
+	nci->root = strdup(dir);
+	if(nci->root == nil)
+		goto err;
+	cp = strchr(nci->root+1, '/');
+	if(cp == nil)
+		goto err;
+	*cp = 0;
+
+	/* figure out bind spec */
+	d = dirstat(nci->dir);
+	if(d != nil){
+		sprint(spec, "#%C%d", d->type, d->dev);
+		nci->spec = strdup(spec);
+	}
+	if(nci->spec == nil)
+		nci->spec = unknown;
+	free(d);
+
+	/* get the two end points */
+	getendpoint(nci->dir, "local", &nci->lsys, &nci->lserv);
+	if(nci->lsys == nil || nci->lserv == nil)
+		goto err;
+	getendpoint(nci->dir, "remote", &nci->rsys, &nci->rserv);
+	if(nci->rsys == nil || nci->rserv == nil)
+		goto err;
+
+	strecpy(netname, netname+sizeof netname, nci->dir);
+	if((p = strrchr(netname, '/')) != nil)
+		*p = 0;
+	if(strncmp(netname, "/net/", 5) == 0)
+		memmove(netname, netname+5, strlen(netname+5)+1);
+	nci->laddr = smprint("%s!%s!%s", netname, nci->lsys, nci->lserv);
+	nci->raddr = smprint("%s!%s!%s", netname, nci->rsys, nci->rserv);
+	if(nci->laddr == nil || nci->raddr == nil)
+		goto err;
+	return nci;
+err:
+	freenetconninfo(nci);
+	return nil;
+}
+
+static void
+xfree(char *x)
+{
+	if(x == nil || x == unknown)
+		return;
+	free(x);
+}
+
+void
+freenetconninfo(NetConnInfo *nci)
+{
+	if(nci == nil)
+		return;
+	xfree(nci->root);
+	xfree(nci->dir);
+	xfree(nci->spec);
+	xfree(nci->lsys);
+	xfree(nci->lserv);
+	xfree(nci->rsys);
+	xfree(nci->rserv);
+	xfree(nci->laddr);
+	xfree(nci->raddr);
+	free(nci);
+}