ppp/ppp-2.4.2-pppoatm.patch

diff -u -r -N a/ppp/pppd/options.c ppp/pppd/options.c
--- a/ppp/pppd/options.c	2003-03-03 06:11:46.000000000 +0100
+++ b/pppd/options.c	2003-07-01 11:17:12.000000000 +0200
@@ -843,6 +843,22 @@
 }
 
 /*
+ * remove_option - permanently remove an option from consideration...
+ * for use by modules to remove choices which no longer make sense.
+ * returns true if found an option
+ */
+int remove_option(const char *name)
+{
+	option_t *o;
+
+	o = find_option(name);
+	if (o == NULL)
+		return 0;
+	o->name = "";
+	return 1;
+}
+
+/*
  * check_options - check that options are valid and consistent.
  */
 void
diff -u -r -N a/ppp/pppd/plugins/Makefile.linux ppp/pppd/plugins/Makefile.linux
--- a/ppp/pppd/plugins/Makefile.linux	2003-02-16 23:31:24.000000000 +0100
+++ b/pppd/plugins/Makefile.linux	2003-07-01 11:39:05.000000000 +0200
@@ -6,7 +6,7 @@
 SUBDIRS := rp-pppoe
 # Uncomment the next line to include the radius authentication plugin
 # SUBDIRS += radius
-PLUGINS := minconn.so passprompt.so passwordfd.so
+PLUGINS := minconn.so passprompt.so passwordfd.so pppoatm.so
 
 # include dependencies if present
 ifeq (.depend,$(wildcard .depend))
@@ -16,6 +16,9 @@
 all:	$(PLUGINS)
 	for d in $(SUBDIRS); do $(MAKE) $(MFLAGS) -C $$d all; done
 
+pppoatm.so: pppoatm.c
+	$(CC) -o $@ $(LDFLAGS) $(CFLAGS) $^ -latm
+
 %.so: %.c
 	$(CC) -o $@ $(LDFLAGS) $(CFLAGS) $^
 
diff -u -r -N a/ppp/pppd/plugins/pppoatm.c ppp/pppd/plugins/pppoatm.c
--- /dev/null	1970-01-01 01:00:00.000000000 +0100
+++ b/pppd/plugins/pppoatm.c	2003-07-01 11:39:37.000000000 +0200
@@ -0,0 +1,232 @@
+/* pppoatm.c - pppd plugin to implement PPPoATM protocol.
+ *
+ * Copyright 2000 Mitchell Blank Jr.
+ * Based in part on work from Jens Axboe and Paul Mackerras.
+ * Updated to ppp-2.4.1 by Bernhard Kaindl
+ *
+ *  This program is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU General Public License
+ *  as published by the Free Software Foundation; either version
+ *  2 of the License, or (at your option) any later version.
+ */
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+#include "pppd.h"
+#include "pathnames.h"
+#include "fsm.h" /* Needed for lcp.h to include cleanly */
+#include "lcp.h"
+#include <atm.h>
+#include <linux/atmdev.h>
+#include <linux/atmppp.h>
+#include <sys/stat.h>
+#include <net/if.h>
+#include <sys/ioctl.h>
+
+const char pppd_version[] = VERSION;
+
+static struct sockaddr_atmpvc pvcaddr;
+static char *qosstr = NULL;
+//static int pppoatm_accept = 0;
+static bool llc_encaps = 0;
+static bool vc_encaps = 0;
+static int device_got_set = 0;
+static int pppoatm_max_mtu, pppoatm_max_mru;
+static int setdevname_pppoatm(const char *cp, const char **argv, int doit);
+struct channel pppoa_channel;
+
+static option_t pppoa_options[] = {
+	{ "device name", o_wild, (void *) &setdevname_pppoatm,
+	  "ATM service provider IDs: VPI.VCI",
+	  OPT_DEVNAM | OPT_PRIVFIX | OPT_NOARG  | OPT_A2STRVAL | OPT_STATIC,
+	  devnam},
+#if 0
+	{ "accept", o_bool, &pppoatm_accept,
+	  "set PPPoATM socket to accept incoming connections", 1 },
+#endif
+	{ "llc-encaps", o_bool, &llc_encaps,
+	  "use LLC encapsulation for PPPoATM", 1},
+	{ "vc-encaps", o_bool, &vc_encaps,
+	  "use VC multiplexing for PPPoATM (default)", 1},
+	{ "qos", o_string, &qosstr,
+	  "set QoS for PPPoATM connection", 1},
+	{ NULL }
+};
+
+/* returns:
+ *  -1 if there's a problem with setting the device
+ *   0 if we can't parse "cp" as a valid name of a device
+ *   1 if "cp" is a reasonable thing to name a device
+ * Note that we don't actually open the device at this point
+ * We do need to fill in:
+ *   devnam: a string representation of the device
+ *   devstat: a stat structure of the device.  In this case
+ *     we're not opening a device, so we just make sure
+ *     to set up S_ISCHR(devstat.st_mode) != 1, so we
+ *     don't get confused that we're on stdin.
+ */
+int (*old_setdevname_hook)(const char* cp) = NULL;
+static int setdevname_pppoatm(const char *cp, const char **argv, int doit)
+{
+	struct sockaddr_atmpvc addr;
+	extern struct stat devstat;
+	if (device_got_set)
+		return 0;
+	//info("PPPoATM setdevname_pppoatm: '%s'", cp);
+	memset(&addr, 0, sizeof addr);
+	if (text2atm(cp, (struct sockaddr *) &addr, sizeof(addr),
+	    T2A_PVC | T2A_NAME) < 0) {
+               if(doit)
+                   info("atm does not recognize: %s", cp);
+		return 0;
+           }
+	if (!doit) return 1;
+	//if (!dev_set_ok()) return -1;
+	memcpy(&pvcaddr, &addr, sizeof pvcaddr);
+	strlcpy(devnam, cp, sizeof devnam);
+	devstat.st_mode = S_IFSOCK;
+	if (the_channel != &pppoa_channel) {
+		static char *bad_options[] = {
+			"noaccomp", "-ac",
+			"default-asyncmap", "-am", "asyncmap", "-as", "escape",
+			"receive-all",
+			"crtscts", "-crtscts", "nocrtscts",
+			"cdtrcts", "nocdtrcts",
+			"xonxoff",
+			"modem", "local", "sync",
+			NULL };
+			char **a;
+		the_channel = &pppoa_channel;
+		info("PPPoATM setdevname - remove unwanted options");
+		for (a = bad_options; *a != NULL; a++)
+			remove_option(*a);
+		modem = 0;
+		lcp_wantoptions[0].neg_accompression = 0;
+		lcp_allowoptions[0].neg_accompression = 0;
+		lcp_wantoptions[0].neg_asyncmap = 0;
+		lcp_allowoptions[0].neg_asyncmap = 0;
+		lcp_wantoptions[0].neg_pcompression = 0;
+	}
+	info("PPPoATM setdevname_pppoatm - SUCCESS:%s", cp);
+	device_got_set = 1;
+	return 1;
+}
+
+#define pppoatm_overhead() (llc_encaps ? 6 : 2)
+
+static void no_device_given_pppoatm(void)
+{
+	fatal("No vpi.vci specified");
+}
+
+static void set_line_discipline_pppoatm(int fd)
+{
+	struct atm_backend_ppp be;
+	be.backend_num = ATM_BACKEND_PPP;
+	if (!llc_encaps)
+		be.encaps = PPPOATM_ENCAPS_VC;
+	else if (!vc_encaps)
+		be.encaps = PPPOATM_ENCAPS_LLC;
+	else
+		be.encaps = PPPOATM_ENCAPS_AUTODETECT;
+	if (ioctl(fd, ATM_SETBACKEND, &be) < 0)
+		fatal("ioctl(ATM_SETBACKEND): %m");
+}
+
+#if 0
+static void reset_line_discipline_pppoatm(int fd)
+{
+	atm_backend_t be = ATM_BACKEND_RAW;
+	/* 2.4 doesn't support this yet */
+	(void) ioctl(fd, ATM_SETBACKEND, &be);
+}
+#endif
+
+static int connect_pppoatm(void)
+{
+	int fd;
+	struct atm_qos qos;
+
+	system ("/sbin/modprobe pppoatm");
+
+	if (!device_got_set)
+		no_device_given_pppoatm();
+	fd = socket(AF_ATMPVC, SOCK_DGRAM, 0);
+	if (fd < 0)
+		fatal("failed to create socket: %m");
+	memset(&qos, 0, sizeof qos);
+	qos.txtp.traffic_class = qos.rxtp.traffic_class = ATM_UBR;
+	/* TODO: support simplified QoS setting */
+	if (qosstr != NULL)
+		if (text2qos(qosstr, &qos, 0))
+			fatal("Can't parse QoS: \"%s\"");
+	qos.txtp.max_sdu = lcp_allowoptions[0].mru + pppoatm_overhead();
+	qos.rxtp.max_sdu = lcp_wantoptions[0].mru + pppoatm_overhead();
+	qos.aal = ATM_AAL5;
+	if (setsockopt(fd, SOL_ATM, SO_ATMQOS, &qos, sizeof(qos)) < 0)
+		fatal("setsockopt(SO_ATMQOS): %m");
+	/* TODO: accept on SVCs... */
+	if (connect(fd, (struct sockaddr *) &pvcaddr,
+	    sizeof(struct sockaddr_atmpvc)))
+		fatal("connect(%s): %m", devnam);
+	pppoatm_max_mtu = lcp_allowoptions[0].mru;
+	pppoatm_max_mru = lcp_wantoptions[0].mru;
+	set_line_discipline_pppoatm(fd);
+	strlcpy(ppp_devnam, devnam, sizeof(ppp_devnam));
+	return fd;
+}
+
+static void send_config_pppoa(int mtu,
+			      u_int32_t asyncmap,
+			      int pcomp,
+			      int accomp)
+{
+	int sock;
+	struct ifreq ifr;
+	if (mtu > pppoatm_max_mtu)
+		error("Couldn't increase MTU to %d", mtu);
+	sock = socket(AF_INET, SOCK_DGRAM, 0);
+	if (sock < 0)
+		fatal("Couldn't create IP socket: %m");
+	strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
+	ifr.ifr_mtu = mtu;
+	if (ioctl(sock, SIOCSIFMTU, (caddr_t) &ifr) < 0)
+		fatal("ioctl(SIOCSIFMTU): %m");
+	(void) close (sock);
+}
+
+static void recv_config_pppoa(int mru,
+			      u_int32_t asyncmap,
+			      int pcomp,
+			      int accomp)
+{
+	if (mru > pppoatm_max_mru)
+		error("Couldn't increase MRU to %d", mru);
+}
+
+void plugin_init(void)
+{
+#if defined(__linux__)
+	extern int new_style_driver;	/* From sys-linux.c */
+	if (!ppp_available() && !new_style_driver)
+		fatal("Kernel doesn't support ppp_generic - "
+		    "needed for PPPoATM");
+#else
+	fatal("No PPPoATM support on this OS");
+#endif
+	info("PPPoATM plugin_init");
+	add_options(pppoa_options);
+}
+struct channel pppoa_channel = {
+    options: pppoa_options,
+    process_extra_options: NULL,
+    check_options: NULL,
+    connect: &connect_pppoatm,
+    disconnect: NULL,
+    establish_ppp: &generic_establish_ppp,
+    disestablish_ppp: &generic_disestablish_ppp,
+    send_config: &send_config_pppoa,
+    recv_config: &recv_config_pppoa,
+    close: NULL,
+    cleanup: NULL
+};
diff -u -r -N a/ppp/pppd/pppd.h ppp/pppd/pppd.h
--- a/ppp/pppd/pppd.h	2003-04-07 02:01:46.000000000 +0200
+++ b/pppd/pppd.h	2003-07-01 11:18:54.000000000 +0200
@@ -408,6 +408,7 @@
     option_t *options;		/* List of command-line options */
     /* Check requested options, assign defaults */
     void (*check_options) __P((void));
+    int (*remove_option) __P((const char *)); /* Disable the specified option */
     /* Configure interface for demand-dial */
     int  (*demand_conf) __P((int unit));
     /* Say whether to bring up link for this pkt */