commit 6826d61737fa8943adbfd7c60be0b19fbf37a4be
parent 9887fadf490258ebd78f9e7390544e1bb6bebc4b
Author: Jesus Galan Lopez (yiyus) <yiyu.jgl@gmail.com>
Date: Sat, 5 Jun 2010 10:36:08 +0200
initial commit of the ethertap driver, AUTHORS file
Diffstat:
4 files changed, 184 insertions(+), 0 deletions(-)
diff --git a/src/9vx/AUTHORS b/src/9vx/AUTHORS
@@ -0,0 +1,8 @@
+Russ Cox
+Jesus Galan Lopez
+Tuly Gray
+Devon H. O'Dell
+Eriq Quantrom
+Brian L. Stuart
+
+(See also the LICENSE file)
diff --git a/src/9vx/LICENSE b/src/9vx/LICENSE
@@ -4,6 +4,8 @@ Plan 9 from Bell Labs distribution, which carries this license.
The local changes are Copyright (c) 2006-2008 Russ Cox and
are distributed as contributions under the terms of this license.
+Other contributors are listed on the AUTHORS file.
+
===================================================================
diff --git a/src/9vx/ethertap.c b/src/9vx/ethertap.c
@@ -0,0 +1,173 @@
+/*
+ * ethertap: tap device ethernet driver
+ * copyright © 2008 erik quanstrom
+ * copyright © 2010 Tully Gray
+ * copyright © 2010 Jesus Galan Lopez
+ */
+
+#include "u.h"
+#include <sys/socket.h>
+#include <net/if.h>
+#include <netpacket/packet.h>
+#include <net/ethernet.h>
+#include <netinet/in.h>
+#include <sys/ioctl.h>
+#include <linux/if_tun.h>
+
+#include "a/lib.h"
+#include "a/mem.h"
+#include "a/dat.h"
+#include "a/fns.h"
+#include "a/io.h"
+#include "a/error.h"
+#include "a/netif.h"
+
+#include "a/etherif.h"
+
+extern char *vxhostdev;
+static uchar anyea[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff,};
+
+typedef struct Ctlr Ctlr;
+struct Ctlr {
+ int fd;
+ int txerrs;
+ int promisc;
+ uchar ea[Eaddrlen];
+};
+
+static int
+setup(char *dev)
+{
+ int fd;
+ struct ifreq ifr;
+ struct sockaddr_ll sa;
+
+ if((fd = open("/dev/net/tun", O_RDWR)) < 0)
+ return -1;
+ if(dev){
+ memset(&ifr, 0, sizeof ifr);
+ strncpy(ifr.ifr_name, dev, sizeof ifr.ifr_name);
+ ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
+ if(ioctl(fd, TUNSETIFF, &ifr) < 0){
+ close(fd);
+ return -1;
+ }
+ }
+
+ return fd;
+}
+
+Block*
+rspkt(Ctlr *c)
+{
+ int n;
+ Block *b;
+
+ b = allocb(1514);
+ for(;;){
+ n = read(c->fd, b->rp, BALLOC(b));
+ if(n <= 0)
+ panic("fd %d read %d", c->fd, n);
+ if(c->promisc == 0)
+ if(memcmp(b->rp + 0, anyea, 6) == 0
+ || memcmp(b->rp + 0, c->ea, 6) == 0)
+ break;
+ }
+ b->wp += n;
+ b->flag |= Btcpck|Budpck|Bpktck;
+ return b;
+}
+
+static void
+rsrecvkproc(void *v)
+{
+ Block *b;
+ Ether *e;
+
+ e = v;
+ while(b = rspkt(e->ctlr))
+ etheriq(e, b, 1);
+ pexit("read fail", 1);
+}
+
+static void
+rstransmit(Ether* e)
+{
+ Block *b, *h;
+ Ctlr *c;
+
+ c = e->ctlr;
+ while ((b = qget(e->oq)) != nil) {
+ if(memcmp(b->rp + 6, anyea, 6) == 0 ||
+ memcmp(b->rp + 0, c->ea, 6) == 0){
+ h = allocb(BLEN(b));
+ memcpy(h->rp, b->wp, BLEN(b));
+ h->wp += BLEN(b);
+ h->flag |= Btcpck|Budpck|Bpktck;
+ etheriq(e, h, 1);
+ }
+ if(write(c->fd, b->rp, BLEN(b)) == -1)
+ c->txerrs++;
+ freeb(b);
+ }
+}
+
+static long
+rsifstat(Ether *e, void *a, long n, ulong offset)
+{
+ char buf[128];
+ Ctlr *c;
+
+ c = a;
+ snprint(buf, sizeof buf, "txerrors: %lud\n", c->txerrs);
+ return readstr(offset, a, n, buf);
+}
+
+static void
+rsattach(Ether* e)
+{
+ kproc("rsrecv", rsrecvkproc, e);
+}
+
+static uchar eatab[] = {
+ 0x00, 0x48, 0x01, 0x23, 0x45, 0x60,
+};
+
+static char *rsdevtab[] = {
+ "tap0",
+};
+
+static int
+rspnp(Ether* e)
+{
+ uchar *ea;
+ Ctlr c;
+ static int nctlr;
+
+ if(nctlr >= nelem(eatab)/Eaddrlen)
+ return -1;
+ ea = eatab + Eaddrlen*nctlr;
+ memset(&c, 0, sizeof c);
+ c.fd = setup(rsdevtab[nctlr++]);
+ memcpy(c.ea, ea, Eaddrlen);
+ if(c.fd== -1){
+ print("rs: failed to initialize\n");
+ return -1;
+ }
+ e->ctlr = malloc(sizeof c);
+ memcpy(e->ctlr, &c, sizeof c);
+ e->tbdf = BUSUNKNOWN;
+ memcpy(e->ea, ea, Eaddrlen);
+ e->attach = rsattach;
+ e->transmit = rstransmit;
+ e->ifstat = rsifstat;
+ e->ni.arg = e;
+ e->ni.link = 1;
+ return 0;
+}
+
+void
+ethervelink(void)
+{
+ addethercard("rs", rspnp);
+}
diff --git a/src/9vx/etherve.c b/src/9vx/etherve.c
@@ -3,6 +3,7 @@
*
* Copyright (c) 2008 Devon H. O'Dell
* copyright © 2008 erik quanstrom
+ * copyright © 2010 Jesus Galan Lopez
*
* Released under 2-clause BSD license.
*/
