ipoe: for vlan name pattern implemented %P argument - VID of parent interface

accel-pppd/accel-ppp.conf.5

@@ -386,6 +386,9 @@ Specifies pattern of vlan interface name. Pattern may contain following macros:
 .B %N
 - number of vlan.
 .br
+.B %P
+- number of vlan of parent interface.
+.br
 By default vlan-name=%I.%N.
 .TP
 .BI "soft-terminate=" 0|1

accel-pppd/ctrl/ipoe/ipoe.c

@@ -2205,13 +2205,14 @@ static int get_offer_delay()
 	return 0;
 }
 
-static int make_vlan_name(const char *parent, int vid, char *name)
+static int make_vlan_name(const char *parent, int svid, int cvid, char *name)
 {
 	char *ptr1 = name, *endptr = name + IFNAMSIZ;
 	const char *ptr2 = conf_vlan_name;
-	char num[5], *ptr3 = num;
+	char svid_str[5], cvid_str[5], *ptr3;
 
-	sprintf(num, "%i", vid);
+	sprintf(svid_str, "%i", svid);
+	sprintf(cvid_str, "%i", cvid);
 
 	while (ptr1 < endptr && *ptr2) {
 		if (ptr2[0] == '%' && ptr2[1] == 'I') {
@@ -2219,6 +2220,12 @@ static int make_vlan_name(const char *parent, int vid, char *name)
 				*ptr1++ = *parent++;
 			ptr2 += 2;
 		} else if (ptr2[0] == '%' && ptr2[1] == 'N') {
+			ptr3 = cvid_str;
+			while (ptr1 < endptr && *ptr3)
+				*ptr1++ = *ptr3++;
+			ptr2 += 2;
+		} else if (ptr2[0] == '%' && ptr2[1] == 'P') {
+			ptr3 = svid_str;
 			while (ptr1 < endptr && *ptr3)
 				*ptr1++ = *ptr3++;
 			ptr2 += 2;
@@ -2240,7 +2247,7 @@ void ipoe_vlan_notify(int ifindex, int vid)
 	struct conf_option_t *opt;
 	struct ifreq ifr;
 	char *ptr;
-	int len, r;
+	int len, r, svid;
 	pcre *re = NULL;
 	const char *pcre_err;
 	char *pattern;
@@ -2257,7 +2264,9 @@ void ipoe_vlan_notify(int ifindex, int vid)
 		return;
 	}
 
-	if (make_vlan_name(ifr.ifr_name, vid, ifname)) {
+	svid = iplink_vlan_get_vid(ifindex);
+
+	if (make_vlan_name(ifr.ifr_name, svid, vid, ifname)) {
 		log_error("ipoe: vlan-mon: %s.%i: interface name is too long\n", ifr.ifr_name, vid);
 		return;
 	}

accel-pppd/ctrl/ipoe/ipoe.h

@@ -35,6 +35,7 @@ struct ipoe_serv {
 	pthread_mutex_t lock;
 	int parent_ifindex;
 	int vid;
+	int parent_vid;
 	int opt_mode;
 	uint32_t opt_src;
 	int opt_arp;

accel-pppd/libnetlink/iputils.c

@@ -243,6 +243,60 @@ int __export iplink_vlan_del(int ifindex)
 	return 0;
 }
 
+int __export iplink_vlan_get_vid(int ifindex)
+{
+	struct iplink_req {
+		struct nlmsghdr n;
+		struct ifinfomsg i;
+		char buf[4096];
+	} req;
+	struct ifinfomsg *ifi;
+	int len;
+	struct rtattr *tb[IFLA_MAX + 1];
+
+	if (!rth)
+		open_rth();
+
+	if (!rth)
+		return -1;
+
+	memset(&req, 0, sizeof(req) - 4096);
+
+	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
+	req.n.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
+	req.n.nlmsg_type = RTM_GETLINK;
+	req.i.ifi_family = AF_PACKET;
+	req.i.ifi_index = ifindex;
+
+	if (rtnl_talk(rth, &req.n, 0, 0, &req.n, NULL, NULL, 0) < 0)
+		return -1;
+
+	if (req.n.nlmsg_type != RTM_NEWLINK)
+		return -1;
+
+	ifi = NLMSG_DATA(&req.n);
+
+	len = req.n.nlmsg_len;
+
+	len -= NLMSG_LENGTH(sizeof(*ifi));
+	if (len < 0)
+		return -1;
+
+	parse_rtattr(tb, IFLA_MAX, IFLA_RTA(ifi), len);
+
+	if (!tb[IFLA_LINKINFO])
+		return 0;
+
+	parse_rtattr_nested(tb, IFLA_MAX, tb[IFLA_LINKINFO]);
+
+	if (strcmp(RTA_DATA(tb[IFLA_INFO_KIND]), "vlan"))
+		return 0;
+
+	parse_rtattr_nested(tb, IFLA_MAX, tb[IFLA_INFO_DATA]);
+	return *(uint16_t *)RTA_DATA(tb[IFLA_VLAN_ID]);
+}
+
+
 int __export ipaddr_add(int ifindex, in_addr_t addr, int mask)
 {
 	struct ipaddr_req {

accel-pppd/libnetlink/iputils.h

@@ -10,6 +10,7 @@ int iplink_get_stats(int ifindex, struct rtnl_link_stats *stats);
 
 int iplink_vlan_add(const char *ifname, int ifindex, int vid);
 int iplink_vlan_del(int ifindex);
+int iplink_vlan_get_vid(int ifindex);
 
 int ipaddr_add(int ifindex, in_addr_t addr, int mask);
 int ipaddr_del(int ifindex, in_addr_t addr, int mask);