X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ian/git?a=blobdiff_plain;f=tuntap%2Ftuntap.c;h=b1bad35567c66ed807b97920fc8389911cfb4e88;hb=refs%2Ftags%2Fdebian%2F1.1.1;hp=ee8e99e7aa4e99011b044afe49833fd423970759;hpb=a41625aefb08ed5bf5f07951841bdfe30c4a72c7;p=chiark-tcl.git

diff --git a/tuntap/tuntap.c b/tuntap/tuntap.c
index ee8e99e..b1bad35 100644
--- a/tuntap/tuntap.c
+++ b/tuntap/tuntap.c
@@ -1,22 +1,16 @@
 /*
  */
 /*
- * tuntap-socket-rawlinux create [<ifname>] => <sockid>
- * tuntap-socket-rawlinux ifname <sockid> => <ifname>
- * tuntap-socket-rawlinux close <sockid>
- * tuntap-socket-rawlinux receive <sockid> <data>
- * tuntap-socket-rawlinux on-transmit <sockid> <mtu> [<script>]
+ * tuntap-socket-raw create [<ifname>] => <sockid>
+ * tuntap-socket-raw ifname <sockid> => <ifname>
+ * tuntap-socket-raw close <sockid>
+ * tuntap-socket-raw receive <sockid> <data>
+ * tuntap-socket-raw on-transmit <sockid> <mtu> [<script>]
  *    calls, effectively,  eval <script> [list <data> <socket>]
  *    if script not supplied, cancel
  */
 
-#include "tables.h"
-#include "hbytes.h"
-#include "hbytes.h"
-
-#include <sys/ioctl.h>
-#include <linux/if.h>
-#include <linux/if_tun.h>
+#include "chiark_tcl_tuntap.h"
 
 typedef struct TunSocket {
   int ix, fd, script_llength;
@@ -27,10 +21,8 @@ typedef struct TunSocket {
   char *ifname;
 } TuntapSocket;
 
-IdDataTable tuntap_socks= { "tuntap" };
-
-int do_tuntap_socket_create(ClientData cd, Tcl_Interp *ip,
-			    const char *ifname, void **sock_r) {
+int cht_do_tuntapsocket_create_tun(ClientData cd, Tcl_Interp *ip,
+				const char *ifname, void **sock_r) {
   int fd, r;
   struct ifreq ifr;
   TuntapSocket *sock;
@@ -40,18 +32,18 @@ int do_tuntap_socket_create(ClientData cd, Tcl_Interp *ip,
   
   if (ifname) {
     if (strlen(ifname) > IFNAMSIZ-1) return
-      staticerr(ip,"tun interface name too long","TUNTAP IFNAME LENGTH");
+      cht_staticerr(ip,"tun interface name too long","TUNTAP IFNAME LENGTH");
     strcpy(ifr.ifr_name, ifname);
   }
 
   fd= open("/dev/net/tun", O_RDWR);
-  if (fd<0) return posixerr(ip,errno,"open /dev/net/tun");
+  if (fd<0) return cht_posixerr(ip,errno,"open /dev/net/tun");
 
-  r= setnonblock(fd,1);
-  if (r) return posixerr(ip,errno,"setnonblock tun");
+  r= cht_setnonblock(fd,1);
+  if (r) return cht_posixerr(ip,errno,"setnonblock tun");
   
   r= ioctl(fd, TUNSETIFF, (void*)&ifr);
-  if (r) return newfdposixerr(ip,fd,"ioctl TUNSETIFF");
+  if (r) return cht_newfdposixerr(ip,fd,"ioctl TUNSETIFF");
 
   sock= TALLOC(sizeof(TuntapSocket));
   sock->ix= -1;
@@ -60,34 +52,34 @@ int do_tuntap_socket_create(ClientData cd, Tcl_Interp *ip,
   sock->msg_buf= 0;
   sock->ifname= TALLOC(strlen(ifr.ifr_name)+1);
   strcpy(sock->ifname, ifr.ifr_name);
-  scriptinv_init(&sock->script);
+  cht_scriptinv_init(&sock->script);
 
   *sock_r= sock;
   return TCL_OK;
 }
 
-int do_tuntap_socket_receive(ClientData cd, Tcl_Interp *ip,
-			     void *sock_v, HBytes_Value data) {
+int cht_do_tuntapsocket_receive(ClientData cd, Tcl_Interp *ip,
+				 void *sock_v, HBytes_Value data) {
   TuntapSocket *sock= sock_v;
   int l, r;
 
   r= write(sock->fd,
-	   hbytes_data(&data), l=hbytes_len(&data));
-  if (r==-1) return posixerr(ip,errno,"write tuntap");
-  else if (r!=l) return staticerr(ip,"write tuntap gave wrong answer",0);
+	   cht_hb_data(&data), l=cht_hb_len(&data));
+  if (r==-1) return cht_posixerr(ip,errno,"write tuntap");
+  else if (r!=l) return cht_staticerr(ip,"write tuntap gave wrong answer",0);
   return TCL_OK;
 }
 
-int do_tuntap_socket_ifname(ClientData cd, Tcl_Interp *ip,
-			    void *sock_v, const char **result) {
+int cht_do_tuntapsocket_ifname(ClientData cd, Tcl_Interp *ip,
+				void *sock_v, const char **result) {
   TuntapSocket *sock= sock_v;
   *result= sock->ifname;
   return TCL_OK;
 }
 
 static void cancel(TuntapSocket *sock) {
-  if (sock->script.obj) {
-    scriptinv_cancel(&sock->script);
+  if (sock->script.script) {
+    cht_scriptinv_cancel(&sock->script);
     Tcl_DeleteFileHandler(sock->fd);
     TFREE(sock->msg_buf);
     sock->msg_buf= 0;
@@ -97,7 +89,8 @@ static void cancel(TuntapSocket *sock) {
 static void read_call(ClientData sock_cd, int mask) {
   TuntapSocket *sock= (void*)sock_cd;
   Tcl_Interp *ip= sock->ip;
-  int sz, rc;
+  int rc;
+  ssize_t sz;
   HBytes_Value message_val;
   Tcl_Obj *args[2];
 
@@ -105,34 +98,35 @@ static void read_call(ClientData sock_cd, int mask) {
     sz= read(sock->fd, sock->msg_buf, sock->mtu);
     if (sz == -1) {
       if (errno == EAGAIN || errno == EWOULDBLOCK) rc=0;
-      else rc= posixerr(ip,errno,"read tuntap");
+      else rc= cht_posixerr(ip,errno,"read tuntap");
       goto x_rc;
     }
 
     assert(sz <= sock->mtu);
 
-    hbytes_array(&message_val, sock->msg_buf, sz);
-    args[0]= ret_hb(ip, message_val);  hbytes_empty(&message_val);
-    args[1]= ret_iddata(ip, sock, &tuntap_socks);
-    scriptinv_invoke(&sock->script, 2, args);
+    cht_hb_array(&message_val, sock->msg_buf, sz);
+    args[0]= cht_ret_hb(ip, message_val);  cht_hb_empty(&message_val);
+    args[1]= cht_ret_iddata(ip, sock, &cht_tuntap_socks);
+    cht_scriptinv_invoke(&sock->script, 2, args);
   }
 
 x_rc:
   if (rc) Tcl_BackgroundError(ip);
 }
 
-int do_tuntap_socket_on_transmit(ClientData cd, Tcl_Interp *ip, void *sock_v,
-				 long mtu, Tcl_Obj *newscript) {
+int cht_do_tuntapsocket_on_transmit(ClientData cd, Tcl_Interp *ip,
+				     void *sock_v,
+				     long mtu, Tcl_Obj *newscript) {
   TuntapSocket *sock= sock_v;
   int rc;
 
   if (mtu > 65536)
-    return staticerr(ip,"tuntap mtu >2^16","TUNTAP MTU OVERRUN");
+    return cht_staticerr(ip,"tuntap mtu >2^16","TUNTAP MTU OVERRUN");
 
   cancel(sock);
   
   if (newscript) {
-    rc= scriptinv_set(&sock->script,ip,newscript);
+    rc= cht_scriptinv_set(&sock->script,ip,newscript,0);
     if (rc) return rc;
     
     sock->mtu= mtu;
@@ -142,15 +136,26 @@ int do_tuntap_socket_on_transmit(ClientData cd, Tcl_Interp *ip, void *sock_v,
   return TCL_OK;
 }
 
-int do_tuntap_socket_close(ClientData cd, Tcl_Interp *ip, void *sock_v) {
+static void destroy(void *sock_v) {
   TuntapSocket *sock= sock_v;
-  
-  int sockix;
   cancel(sock);
   close(sock->fd); /* nothing useful to be done with errors */
-  sockix= sock->ix;
   TFREE(sock->msg_buf);
   TFREE(sock);
-  tuntap_socks.a[sockix]= 0;
+}
+
+static void destroy_idtabcb(Tcl_Interp *ip, void *sock_v) {
+  destroy(sock_v);
+}
+
+int cht_do_tuntapsocket_close(ClientData cd, Tcl_Interp *ip, void *sock) {
+  cht_tabledataid_disposing(ip,sock,&cht_tuntap_socks);
+  destroy(sock);
   return TCL_OK;
 }
+
+const IdDataSpec cht_tuntap_socks= {
+  "tuntap", "tuntap-table", destroy_idtabcb
+};
+
+CHT_INIT(tuntap, { }, CHTI_COMMANDS(cht_tuntaptoplevel_entries))