From bff0ea1c99ff68ca6f1ab58dcdfa0054caf42fca Mon Sep 17 00:00:00 2001
From: Kozlov Dmitry <xeb@mail.ru>
Date: Fri, 19 Apr 2013 13:27:21 +0400
Subject: ipoe: accept packets only from specified interfaces

---
 accel-pppd/ctrl/ipoe/ipoe.c         |  5 ++++
 accel-pppd/ctrl/ipoe/ipoe.h         |  2 ++
 accel-pppd/ctrl/ipoe/ipoe_netlink.c | 53 +++++++++++++++++++++++++++++++++++++
 3 files changed, 60 insertions(+)

(limited to 'accel-pppd')

diff --git a/accel-pppd/ctrl/ipoe/ipoe.c b/accel-pppd/ctrl/ipoe/ipoe.c
index aae1cd1..116e83c 100644
--- a/accel-pppd/ctrl/ipoe/ipoe.c
+++ b/accel-pppd/ctrl/ipoe/ipoe.c
@@ -1417,6 +1417,9 @@ static void add_interface(const char *ifname, int ifindex, const char *opt)
 		opt_dhcpv4 = conf_dhcpv4;
 	}
 
+	if (opt_up)
+		ipoe_nl_add_interface(ifindex);
+
 	list_for_each_entry(serv, &serv_list, entry) {
 		if (strcmp(ifname, serv->ifname))
 			continue;
@@ -1574,6 +1577,8 @@ static void load_interfaces(struct conf_sect_t *sect)
 	struct conf_option_t *opt;
 	struct list_head *pos, *n;
 
+	ipoe_nl_delete_interfaces();
+
 	list_for_each_entry(serv, &serv_list, entry)
 		serv->active = 0;
 
diff --git a/accel-pppd/ctrl/ipoe/ipoe.h b/accel-pppd/ctrl/ipoe/ipoe.h
index 827cba3..bb5841e 100644
--- a/accel-pppd/ctrl/ipoe/ipoe.h
+++ b/accel-pppd/ctrl/ipoe/ipoe.h
@@ -85,6 +85,8 @@ struct ipoe_serv *ipoe_find_serv(const char *ifname);
 
 void ipoe_nl_add_net(uint32_t addr, int mask);
 void ipoe_nl_delete_nets(void);
+void ipoe_nl_add_interface(int ifindex);
+void ipoe_nl_delete_interfaces(void);
 int ipoe_nl_create(uint32_t peer_addr, uint32_t addr, const char *ifname, uint8_t *hwaddr);
 void ipoe_nl_delete(int ifindex);
 int ipoe_nl_modify(int ifindex, uint32_t peer_addr, uint32_t addr, const char *ifname, uint8_t *hwaddr);
diff --git a/accel-pppd/ctrl/ipoe/ipoe_netlink.c b/accel-pppd/ctrl/ipoe/ipoe_netlink.c
index b92ec92..dde83a5 100644
--- a/accel-pppd/ctrl/ipoe/ipoe_netlink.c
+++ b/accel-pppd/ctrl/ipoe/ipoe_netlink.c
@@ -82,6 +82,59 @@ void ipoe_nl_add_net(uint32_t addr, int mask)
 		log_error("ipoe: nl_add_net: error talking to kernel\n");
 }
 
+void ipoe_nl_delete_interfaces(void)
+{
+	struct nlmsghdr *nlh;
+	struct genlmsghdr *ghdr;
+	struct {
+		struct nlmsghdr n;
+		char buf[1024];
+	} req;
+
+	if (rth.fd == -1)
+		return;
+
+	nlh = &req.n;
+	nlh->nlmsg_len = NLMSG_LENGTH(GENL_HDRLEN);
+	nlh->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
+	nlh->nlmsg_type = ipoe_genl_id;
+
+	ghdr = NLMSG_DATA(&req.n);
+	ghdr->cmd = IPOE_CMD_DEL_IF;
+
+	addattr32(nlh, 1024, IPOE_ATTR_IFINDEX, -1);
+
+	if (rtnl_talk(&rth, nlh, 0, 0, nlh, NULL, NULL, 0) < 0 )
+		log_error("ipoe: nl_del_iface: error talking to kernel\n");
+}
+
+void ipoe_nl_add_interface(int ifindex)
+{
+	struct nlmsghdr *nlh;
+	struct genlmsghdr *ghdr;
+	struct {
+		struct nlmsghdr n;
+		char buf[1024];
+	} req;
+	
+	if (rth.fd == -1)
+		return;
+
+	nlh = &req.n;
+	nlh->nlmsg_len = NLMSG_LENGTH(GENL_HDRLEN);
+	nlh->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
+	nlh->nlmsg_type = ipoe_genl_id;
+
+	ghdr = NLMSG_DATA(&req.n);
+	ghdr->cmd = IPOE_CMD_ADD_IF;
+
+	addattr32(nlh, 1024, IPOE_ATTR_IFINDEX, ifindex);
+
+	if (rtnl_talk(&rth, nlh, 0, 0, nlh, NULL, NULL, 0) < 0 )
+		log_error("ipoe: nl_add_iface: error talking to kernel\n");
+}
+
+
 int ipoe_nl_create(uint32_t peer_addr, uint32_t addr, const char *ifname, uint8_t *hwaddr)
 {
 	struct rtnl_handle rth;
-- 
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