ppp: - patch pppd to support named interfaces (e.g. "pppoe-wan") - use named interfaces when bringing up 3g, pptp, ppp or pppoe connections - get rid of unit count logic - shutdown pppd when ifdown is invoked - bump package revision

SVN-Revision: 21283

5 files changed, 158 insertions, 63 deletions

diff --git a/package/ppp/Makefile b/package/ppp/Makefile
index f8bfa48b6b..90e4590efe 100644
--- a/package/ppp/Makefile
+++ b/package/ppp/Makefile
@@ -10,7 +10,7 @@ include $(INCLUDE_DIR)/kernel.mk
 
 PKG_NAME:=ppp
 PKG_VERSION:=2.4.4
-PKG_RELEASE:=5
+PKG_RELEASE:=6
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=ftp://ftp.samba.org/pub/ppp/
diff --git a/package/ppp/files/etc/ppp/ip-up b/package/ppp/files/etc/ppp/ip-up
index 376c87e569..4b44b25d0b 100755
--- a/package/ppp/files/etc/ppp/ip-up
+++ b/package/ppp/files/etc/ppp/ip-up
@@ -6,11 +6,10 @@ PPP_SPEED="$3"
 PPP_LOCAL="$4"
 PPP_REMOTE="$5"
 PPP_IPPARAM="$(echo $6 | sed 's/\./_/g')"
-PPP_UNIT="${PPP_IFACE##ppp}"
 
 export PPP_IFACE PPP_TTY PPP_SPEED PPP_LOCAL PPP_REMOTE PPP_IPPARAM
 [ -z "$PPP_IPPARAM" -o -z "$PPP_LOCAL" ] || {
-	uci_set_state network "$PPP_IPPARAM" unit "$PPP_UNIT"
+	uci_set_state network "$PPP_IPPARAM" ifname "$PPP_IFACE"
 	uci_set_state network "$PPP_IPPARAM" ipaddr "$PPP_LOCAL"
 	uci_set_state network "$PPP_IPPARAM" gateway "$PPP_REMOTE"
 
diff --git a/package/ppp/files/ppp.sh b/package/ppp/files/ppp.sh
index c6440025be..69051132ed 100644
--- a/package/ppp/files/ppp.sh
+++ b/package/ppp/files/ppp.sh
@@ -1,63 +1,33 @@
-scan_ppp() {
-	config_get ifname "$1" ifname
-	pppdev="${pppdev:-0}"
-	config_get devunit "$1" unit
-	{
-	        unit=
-	        pppif=
-	        if [ ! -d /tmp/.ppp-counter ]; then
-	       	     mkdir -p /tmp/.ppp-counter
-	        fi
-	        local maxunit
-	        maxunit="$(cat /tmp/.ppp-counter/max-unit 2>/dev/null)" 
-	        if [ -z "$maxunit" ]; then
-	            maxunit=-1
-	        fi
-	        local i
-	        i=0
-	        while [ $i -le $maxunit ]; do
-	             local unitdev
-	             unitdev="$(cat /tmp/.ppp-counter/ppp${i} 2>/dev/null)"
-	             if [ "$unitdev" = "$1" ]; then
-	                  unit="$i"
-	                  pppif="ppp${i}"
-	                  break
-	             fi
-	             i="$(($i + 1))"
-	        done 
-	        if [ -z "$unit" ] || [ -z "$pppif" ]; then
-	            maxunit="$(($maxunit + 1))"
-	            if [ -n "$devunit" ]; then
-	             	unit="$devunit"
-		    elif [ "${ifname%%[0-9]*}" = ppp ]; then
-			 unit="${ifname##ppp}"
-	            else
-	                 unit="$maxunit"
-	            fi 
-         	    [ "$maxunit" -lt "$unit" ] && maxunit="$unit"
-		    pppif="ppp${unit}"
-		    echo "$1" >/tmp/.ppp-counter/$pppif 2>/dev/null
-		    echo "$maxunit" >/tmp/.ppp-counter/max-unit 2>/dev/null
-	        fi
-		config_set "$1" ifname "ppp$unit"
-		config_set "$1" unit "$unit"
+stop_interface_ppp() {
+	local cfg="$1"
+
+	local proto
+	config_get proto "$cfg" proto
+
+	local ifname
+	config_get ifname "$cfg" ifname
+
+	local link="${proto:-ppp}-$ifname"
+	[ -f "/var/run/ppp-${link}.pid" ] && {
+		local pid="$(head -n1 /var/run/ppp-${link}.pid 2>/dev/null)"
+		grep -qs pppd "/proc/$pid/cmdline" && kill -TERM $pid
 	}
 }
 
 start_pppd() {
 	local cfg="$1"; shift
-	local ifname
 
-	# make sure the network state references the correct ifname
-	scan_ppp "$cfg"
-	config_get ifname "$cfg" ifname
-	set_interface_ifname "$cfg" "$ifname"
+	local proto
+	config_get proto "$cfg" proto
+
+	# unique link identifier
+	local link="${proto:-ppp}-$cfg"
 
 	# make sure only one pppd process is started
-	lock "/var/lock/ppp-${cfg}"
-	local pid="$(head -n1 /var/run/ppp-${cfg}.pid 2>/dev/null)"
+	lock "/var/lock/ppp-${link}"
+	local pid="$(head -n1 /var/run/ppp-${link}.pid 2>/dev/null)"
 	[ -d "/proc/$pid" ] && grep pppd "/proc/$pid/cmdline" 2>/dev/null >/dev/null && {
-		lock -u "/var/lock/ppp-${cfg}"
+		lock -u "/var/lock/ppp-${link}"
 		return 0
 	}
 
@@ -68,9 +38,6 @@ start_pppd() {
 	local device
 	config_get device "$cfg" device
 
-	local unit
-	config_get unit "$cfg" unit
-
 	local username
 	config_get username "$cfg" username
 
@@ -91,7 +58,8 @@ start_pppd() {
 
 	local defaultroute
 	config_get_bool defaultroute "$cfg" defaultroute 1
-	[ "$defaultroute" -eq 1 ] && defaultroute="defaultroute replacedefaultroute" || defaultroute=""
+	[ "$defaultroute" -eq 1 ] && \
+		defaultroute="defaultroute replacedefaultroute" || defaultroute=""
 
 	local interval="${keepalive##*[, ]}"
 	[ "$interval" != "$keepalive" ] || interval=5
@@ -142,15 +110,15 @@ start_pppd() {
 		$peerdns \
 		$defaultroute \
 		${username:+user "$username" password "$password"} \
-		unit "$unit" \
-		linkname "$cfg" \
+		linkname "$link" \
 		ipparam "$cfg" \
+		ifname "$link" \
 		${connect:+connect "$connect"} \
 		${disconnect:+disconnect "$disconnect"} \
 		${ipv6} \
 		${pppd_options}
 
-	lock -u "/var/lock/ppp-${cfg}"
+	lock -u "/var/lock/ppp-${link}"
 }
 
 setup_interface_ppp() {
diff --git a/package/ppp/files/pppoe.sh b/package/ppp/files/pppoe.sh
index 74f1a8579c..bbd36a11ab 100644
--- a/package/ppp/files/pppoe.sh
+++ b/package/ppp/files/pppoe.sh
@@ -1,5 +1,5 @@
-scan_pppoe() {
-	scan_ppp "$@"
+stop_interface_pppoe() {
+	stop_interface_ppp "$1"
 }
 
 setup_interface_pppoe() {
diff --git a/package/ppp/patches/320-custom_iface_names.patch b/package/ppp/patches/320-custom_iface_names.patch
new file mode 100644
index 0000000000..16d90c4d7a
--- /dev/null
+++ b/package/ppp/patches/320-custom_iface_names.patch
@@ -0,0 +1,128 @@
+--- a/pppd/main.c
++++ b/pppd/main.c
+@@ -742,8 +742,11 @@ void
+ set_ifunit(iskey)
+     int iskey;
+ {
+-    info("Using interface %s%d", PPP_DRV_NAME, ifunit);
+-    slprintf(ifname, sizeof(ifname), "%s%d", PPP_DRV_NAME, ifunit);
++    if (use_ifname[0] == 0)
++	slprintf(ifname, sizeof(ifname), "%s%d", PPP_DRV_NAME, ifunit);
++    else
++	slprintf(ifname, sizeof(ifname), "%s", use_ifname);
++    info("Using interface %s", ifname);
+     script_setenv("IFNAME", ifname, iskey);
+     if (iskey) {
+ 	create_pidfile(getpid());	/* write pid to file */
+--- a/pppd/options.c
++++ b/pppd/options.c
+@@ -111,6 +111,7 @@ int	log_to_fd = 1;		/* send log messages
+ bool	log_default = 1;	/* log_to_fd is default (stdout) */
+ int	maxfail = 10;		/* max # of unsuccessful connection attempts */
+ char	linkname[MAXPATHLEN];	/* logical name for link */
++char	use_ifname[IFNAMSIZ];	/* physical name for PPP link */
+ bool	tune_kernel;		/* may alter kernel settings */
+ int	connect_delay = 1000;	/* wait this many ms after connect script */
+ int	req_unit = -1;		/* requested interface unit */
+@@ -264,6 +265,9 @@ option_t general_options[] = {
+     { "linkname", o_string, linkname,
+       "Set logical name for link",
+       OPT_PRIO | OPT_PRIV | OPT_STATIC, NULL, MAXPATHLEN },
++    { "ifname", o_string, use_ifname,
++      "Set physical name for PPP interface",
++      OPT_PRIO | OPT_PRIV | OPT_STATIC, NULL, IFNAMSIZ },
+ 
+     { "maxfail", o_int, &maxfail,
+       "Maximum number of unsuccessful connection attempts to allow",
+--- a/pppd/pppd.h
++++ b/pppd/pppd.h
+@@ -71,6 +71,10 @@
+ #include "eui64.h"
+ #endif
+ 
++#ifndef IFNAMSIZ
++#define IFNAMSIZ	16
++#endif
++
+ /*
+  * Limits.
+  */
+@@ -308,6 +312,7 @@ extern char	*record_file;	/* File to rec
+ extern bool	sync_serial;	/* Device is synchronous serial device */
+ extern int	maxfail;	/* Max # of unsuccessful connection attempts */
+ extern char	linkname[MAXPATHLEN]; /* logical name for link */
++extern char	use_ifname[IFNAMSIZ]; /* physical name for PPP interface */
+ extern bool	tune_kernel;	/* May alter kernel settings as necessary */
+ extern int	connect_delay;	/* Time to delay after connect script */
+ extern int	max_data_rate;	/* max bytes/sec through charshunt */
+--- a/pppd/sys-linux.c
++++ b/pppd/sys-linux.c
+@@ -168,6 +168,10 @@ struct in6_ifreq {
+ /* We can get an EIO error on an ioctl if the modem has hung up */
+ #define ok_error(num) ((num)==EIO)
+ 
++#if !defined(PPP_DRV_NAME)
++#define PPP_DRV_NAME	"ppp"
++#endif /* !defined(PPP_DRV_NAME) */
++
+ static int tty_disc = N_TTY;	/* The TTY discipline */
+ static int ppp_disc = N_PPP;	/* The PPP discpline */
+ static int initfdflags = -1;	/* Initial file descriptor flags for fd */
+@@ -622,7 +626,8 @@ void generic_disestablish_ppp(int dev_fd
+  */
+ static int make_ppp_unit()
+ {
+-	int x, flags;
++	struct ifreq ifr;
++	int x, flags, s;
+ 
+ 	if (ppp_dev_fd >= 0) {
+ 		dbglog("in make_ppp_unit, already had /dev/ppp open?");
+@@ -645,6 +650,32 @@ static int make_ppp_unit()
+ 	}
+ 	if (x < 0)
+ 		error("Couldn't create new ppp unit: %m");
++
++	if (use_ifname[0] != 0) {
++		s = socket(PF_INET, SOCK_DGRAM, 0);
++		if (s < 0)
++			s = socket(PF_PACKET, SOCK_DGRAM, 0);
++		if (s < 0)
++			s = socket(PF_INET6, SOCK_DGRAM, 0);
++		if (s < 0)
++			s = socket(PF_UNIX, SOCK_DGRAM, 0);
++		if (s >= 0) {
++			slprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "%s%d", PPP_DRV_NAME, ifunit);
++			slprintf(ifr.ifr_newname, sizeof(ifr.ifr_newname), "%s", use_ifname);
++			x = ioctl(s, SIOCSIFNAME, &ifr);
++			close(s);
++		} else {
++			x = s;
++		}
++		if (x < 0) {
++			error("Couldn't rename %s to %s", ifr.ifr_name, ifr.ifr_newname);
++			close(ppp_dev_fd);
++			ppp_dev_fd = -1;
++		} else {
++			info("Renamed %s to %s", ifr.ifr_name, ifr.ifr_newname);
++		}
++	}
++
+ 	return x;
+ }
+ 
+--- a/pppstats/pppstats.c
++++ b/pppstats/pppstats.c
+@@ -506,10 +506,12 @@ main(argc, argv)
+     if (argc > 0)
+ 	interface = argv[0];
+ 
++/*
+     if (sscanf(interface, PPP_DRV_NAME "%d", &unit) != 1) {
+ 	fprintf(stderr, "%s: invalid interface '%s' specified\n",
+ 		progname, interface);
+     }
++*/
+ 
+ #ifndef STREAMS
+     {