Keep track of interfaces

ffd/ffd.c

@@ -57,8 +57,10 @@ static unsigned mtu = 1528;
 static int sockfd;
 static struct timespec now;
 
+static ffd_iface_t *iface_list = NULL;
+
 static ffd_neigh_t self;
-static ffd_orig_t own_data;
+//static ffd_orig_t own_data;
 
 /* neighs and origs that have been changed must be moved to front */
 //static ffd_neigh_t *neigh_data = NULL;
@@ -92,12 +94,12 @@ static bool init_self() {
 		return false;
 
 	memset(&self, 0, sizeof(self));
-	memset(&own_data, 0, sizeof(own_data));
+	//memset(&own_data, 0, sizeof(own_data));
 
-	self.addr = own_data.addr = primary_addr;
+	//self.addr = own_data.addr = primary_addr;
 
-	random_bytes(&self.rev, sizeof(self.rev));
-	random_bytes(&own_data.rev, sizeof(own_data.rev));
+	//random_bytes(&self.rev, sizeof(self.rev));
+	//random_bytes(&own_data.rev, sizeof(own_data.rev));
 
 	return true;
 }
@@ -112,10 +114,11 @@ static bool init_socket() {
 	return true;
 }
 
-static void join_mcast(const char *ifname, unsigned ifindex, void *arg) {
+static void update_netif(const char *ifname, unsigned ifindex, void *arg) {
 	if (!use_netif(ifname))
 		return;
 
+	/* join multicast group */
 	struct packet_mreq mr;
 	memset(&mr, 0, sizeof(mr));
 	mr.mr_ifindex = ifindex;
@@ -124,6 +127,48 @@ static void join_mcast(const char *ifname, unsigned ifindex, void *arg) {
 	memcpy(mr.mr_address, ffd_addr.d, ETH_ALEN);
 	if (setsockopt(sockfd, SOL_PACKET, PACKET_ADD_MEMBERSHIP, &mr, sizeof(mr)) && errno != EADDRINUSE)
 		fprintf(stderr, "warning: setsockopt: %m\n");
+
+	ffd_iface_t *iface;
+	for (iface = iface_list; iface; iface = iface->next) {
+		if (iface->ifindex == ifindex)
+			break;
+	}
+
+	if (!iface) {
+		/* new iface */
+		iface = malloc(sizeof(ffd_iface_t));
+		iface->next = iface_list;
+		iface_list = iface;
+
+		iface->seqno = 0;
+		iface->neighs = NULL;
+	}
+
+	iface->ifindex = ifindex;
+	strncpy(iface->name, ifname, IF_NAMESIZE);
+	iface->type = netif_get_type(ifname);
+}
+
+static void update_netifs() {
+	ffd_iface_t *iface, **cur;
+
+	for (iface = iface_list; iface; iface = iface->next)
+		iface->type = IF_UNSPEC;
+
+	netif_foreach(update_netif, NULL);
+
+	cur = &iface_list;
+	while (*cur) {
+		iface = *cur;
+
+		if (iface->type == IF_UNSPEC) {
+			*cur = iface->next;
+			free(iface);
+		}
+		else {
+			cur = &iface->next;
+		}
+	}
 }
 
 static bool send_eth(const eth_addr_t *addr, unsigned ifindex, void *buf, size_t len) {
@@ -158,21 +203,8 @@ static bool send_eth(const eth_addr_t *addr, unsigned ifindex, void *buf, size_t
 	return true;
 }
 
-static void send_hello(const char *ifname, unsigned ifindex, void *arg) {
-	if (!use_netif(ifname))
-		return;
-
-	ffd_packet_t *packet = arg;
-
-	if (!send_eth(&ffd_addr, ifindex, packet, sizeof(ffd_packet_t)+ntohs(packet->len)))
-		fprintf(stderr, "send_eth: %m\n");
-}
 
 static void send_hellos() {
-	/*if (!orig_data)
-	  return;*/
-	static uint16_t seqno = 0;
-
 	ffd_packet_t *packet = alloca(sizeof(ffd_packet_t)+PACKET_MAX);
 
 	packet->version_magic = htons(FFD_VERSION_MAGIC);
@@ -182,11 +214,16 @@ static void send_hellos() {
 	if (!hello)
 		return;
 
-	memset(hello, 0, sizeof(ffd_tlv_hello_t));
-	hello->seqno = htons(seqno++);
+	hello->reserved = 0;
 	hello->interval = htons(HELLO_INTERVAL*100);
 
-	netif_foreach(send_hello, packet);
+	ffd_iface_t *iface;
+	for (iface = iface_list; iface; iface = iface->next) {
+		hello->seqno = htons(iface->seqno++);
+
+		if (!send_eth(&ffd_addr, iface->ifindex, packet, sizeof(ffd_packet_t)+ntohs(packet->len)))
+			fprintf(stderr, "send_eth: %m\n");
+	}
 }
 
 static void receive_packet() {
@@ -219,7 +256,7 @@ int main() {
 	struct timespec next_hello = now;
 
 	while (true) {
-		netif_foreach(join_mcast, NULL);
+		update_netifs();
 
 		int timeout = timespec_diff(&next_hello, &now);
 

ffd/ffd.h

@@ -28,46 +28,35 @@
 #define _FFD_FFD_H_
 
 #include "util.h"
+#include "netif.h"
+
+#include <net/if.h>
 
 
-typedef enum _ffd_msg_type_t {
-	MSG_UNSPEC = 0,
-	MSG_SERVICE,
-	MSG_ROUTE4,
-	MSG_ROUTE6,
-} ffd_msg_type_t;
+typedef struct _ffd_announce_t {
+	struct _ffd_announce_t *next;
 
-typedef struct _ffd_msg_head_t {
-	struct _ffd_msg_head_t *next;
-
-	/* orig rev this message was added or removed last */
-	uint64_t changed_rev;
-	bool deleted;
-
-	ffd_msg_type_t type;
-	uint16_t len;
+	uint8_t type;
+	uint8_t len;
 	uint8_t data[];
-} ffd_msg_head_t;
-
-typedef struct _ffd_orig_t {
-	struct _ffd_orig_t *next;
-
-	/* neigh rev this orig has changed last */
-	uint64_t changed_rev;
-	struct timespec changed_time;
-
-	uint64_t rev;
-	eth_addr_t addr;
-	uint16_t orig_interval;
-
-	ffd_msg_head_t *messages;
-} ffd_orig_t;
+} ffd_announce_head_t;
 
 typedef struct _ffd_neigh_t {
 	struct _ffd_neigh_t *next;
 
-	uint64_t rev;
 	eth_addr_t addr;
 } ffd_neigh_t;
 
+typedef struct _ffd_iface_t {
+	struct _ffd_iface_t *next;
+
+	unsigned ifindex;
+	char name[IF_NAMESIZE];
+
+	netif_type_t type;
+	uint16_t seqno;
+
+	ffd_neigh_t *neighs;
+} ffd_iface_t;
+
 #endif /* _FFD_FFD_H_ */

ffd/netif.c

@@ -36,6 +36,7 @@
 #include <linux/rtnetlink.h>
 
 #include <net/if.h>
+#include <net/if_arp.h>
 
 #include <sys/stat.h>
 #include <sys/types.h>
@@ -81,6 +82,24 @@ static bool batadv_file_read(const char *ifname, const char *file, const char *f
 	return ret;
 }
 
+netif_type_t netif_get_type(const char *ifname) {
+	int type;
+	if (netif_file_read(ifname, "type", "%i", &type) && type == ARPHRD_ETHER) {
+		if(netif_file_exists(ifname, "mesh"))
+			return IF_MESH;
+		else if(netif_file_exists(ifname, "bridge"))
+			return IF_BRIDGE;
+		else if(netif_file_exists(ifname, "tun_flags"))
+			return IF_VIRTUAL;
+		else if(netif_file_exists(ifname, "wireless"))
+			return IF_WIRELESS;
+		else
+			return IF_WIRED;
+	}
+
+	return IF_UNKNOWN;
+}
+
 bool netif_is_mesh(const char *ifname) {
 	return netif_file_exists(ifname, "mesh");
 }

ffd/netif.h

@@ -33,7 +33,8 @@
 
 
 typedef enum _netif_type_t {
-	IF_UNKNOWN = 0,
+	IF_UNSPEC = 0,
+	IF_UNKNOWN,
 	IF_WIRED,
 	IF_WIRELESS,
 	IF_VIRTUAL,
@@ -45,6 +46,7 @@ typedef enum _netif_type_t {
 typedef void (*netif_cb)(const char *ifname, unsigned ifindex, void *arg);
 
 
+netif_type_t netif_get_type(const char *ifname);
 bool netif_is_mesh(const char *ifname);
 char* netif_get_mesh(const char *ifname);
 char* netif_get_bridge(const char *ifname);

ffd/tlv.h

@@ -40,10 +40,18 @@ typedef enum _ffd_tlv_type_t {
 	TLV_NODE_ID,
 	TLV_RESERVED,
 	TLV_UPDATE,
-	TLV_INFO_REQ,
+	TLV_ANNOUNCE_REQ,
 	TLV_SEQNO_REQ,
 } ffd_tlv_type_t;
 
+typedef enum _ffd_addr_enc_t {
+	ADDR_ENC_UNSPEC = 0,
+	ADDR_ENC_IPV4,
+	ADDR_ENC_IPV6,
+	ADDR_ENC_IPV6LL,
+	ADDR_ENC_ETH,
+} ffd_addr_enc_t;
+
 
 typedef void (*ffd_tlv_cb)(ffd_tlv_type_t type, const void *data, size_t len, void *arg);