gdhcp: Move get_interface_name and interface_is_up to common.c

This is needed for the dhcp server implementation.

3 files changed, 76 insertions, 65 deletions

diff --git a/gdhcp/client.c b/gdhcp/client.c
index b9a0e7fc..e3ae0dbb 100644
--- a/gdhcp/client.c
+++ b/gdhcp/client.c
@@ -33,7 +33,6 @@
 
 #include <netpacket/packet.h>
 #include <net/ethernet.h>
-#include <net/if_arp.h>
 
 #include <linux/if.h>
 #include <linux/filter.h>
@@ -268,70 +267,7 @@ static int send_release(GDHCPClient *dhcp_client,
 						server, SERVER_PORT);
 }
 
-static gboolean interface_is_up(int index)
-{
-	int sk, err;
-	struct ifreq ifr;
-	gboolean ret = FALSE;
-
-	sk = socket(PF_INET, SOCK_DGRAM, 0);
-	if (sk < 0) {
-		perror("Open socket error");
-		return FALSE;
-	}
 
-	memset(&ifr, 0, sizeof(ifr));
-	ifr.ifr_ifindex = index;
-
-	err = ioctl(sk, SIOCGIFNAME, &ifr);
-	if (err < 0) {
-		perror("Get interface name error");
-		goto done;
-	}
-
-	err = ioctl(sk, SIOCGIFFLAGS, &ifr);
-	if (err < 0) {
-		perror("Get interface flags error");
-		goto done;
-	}
-
-	if (ifr.ifr_flags & IFF_UP)
-		ret = TRUE;
-
-done:
-	close(sk);
-
-	return ret;
-}
-
-static char *get_interface_name(int index)
-{
-	struct ifreq ifr;
-	int sk, err;
-
-	if (index < 0)
-		return NULL;
-
-	sk = socket(PF_INET, SOCK_DGRAM, 0);
-	if (sk < 0) {
-		perror("Open socket error");
-		return NULL;
-	}
-
-	memset(&ifr, 0, sizeof(ifr));
-	ifr.ifr_ifindex = index;
-
-	err = ioctl(sk, SIOCGIFNAME, &ifr);
-	if (err < 0) {
-		perror("Get interface name error");
-		close(sk);
-		return NULL;
-	}
-
-	close(sk);
-
-	return g_strdup(ifr.ifr_name);
-}
 
 static void get_interface_mac_address(int index, uint8_t *mac_address)
 {
diff --git a/gdhcp/common.c b/gdhcp/common.c
index fc95881e..00817af8 100644
--- a/gdhcp/common.c
+++ b/gdhcp/common.c
@@ -22,11 +22,15 @@
 #include <config.h>
 #endif
 
+#include <stdio.h>
 #include <errno.h>
 #include <unistd.h>
+#include <sys/ioctl.h>
 #include <stdint.h>
 #include <string.h>
 #include <endian.h>
+#include <net/if_arp.h>
+#include <linux/if.h>
 #include <netpacket/packet.h>
 #include <net/ethernet.h>
 
@@ -417,3 +421,68 @@ int dhcp_l3_socket(int port, const char *interface)
 
 	return fd;
 }
+
+char *get_interface_name(int index)
+{
+	struct ifreq ifr;
+	int sk, err;
+
+	if (index < 0)
+		return NULL;
+
+	sk = socket(PF_INET, SOCK_DGRAM, 0);
+	if (sk < 0) {
+		perror("Open socket error");
+		return NULL;
+	}
+
+	memset(&ifr, 0, sizeof(ifr));
+	ifr.ifr_ifindex = index;
+
+	err = ioctl(sk, SIOCGIFNAME, &ifr);
+	if (err < 0) {
+		perror("Get interface name error");
+		close(sk);
+		return NULL;
+	}
+
+	close(sk);
+
+	return g_strdup(ifr.ifr_name);
+}
+
+gboolean interface_is_up(int index)
+{
+	int sk, err;
+	struct ifreq ifr;
+	gboolean ret = FALSE;
+
+	sk = socket(PF_INET, SOCK_DGRAM, 0);
+	if (sk < 0) {
+		perror("Open socket error");
+		return FALSE;
+	}
+
+	memset(&ifr, 0, sizeof(ifr));
+	ifr.ifr_ifindex = index;
+
+	err = ioctl(sk, SIOCGIFNAME, &ifr);
+	if (err < 0) {
+		perror("Get interface name error");
+		goto done;
+	}
+
+	err = ioctl(sk, SIOCGIFFLAGS, &ifr);
+	if (err < 0) {
+		perror("Get interface flags error");
+		goto done;
+	}
+
+	if (ifr.ifr_flags & IFF_UP)
+		ret = TRUE;
+
+done:
+	close(sk);
+
+	return ret;
+}
diff --git a/gdhcp/common.h b/gdhcp/common.h
index 5b6fe581..3aab3d21 100644
--- a/gdhcp/common.h
+++ b/gdhcp/common.h
@@ -47,10 +47,14 @@ do {						\
 
 #define EXTEND_FOR_BUGGY_SERVERS 80
 
-static const uint8_t MAC_BCAST_ADDR[6] __attribute__((aligned(2))) = {
+static const uint8_t MAC_BCAST_ADDR[ETH_ALEN] __attribute__((aligned(2))) = {
 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff
 };
 
+static const uint8_t MAC_ANY_ADDR[ETH_ALEN] __attribute__((aligned(2))) = {
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+};
+
 /* DHCP packet */
 #define DHCP_MAGIC              0x63825363
 #define DHCP_OPTIONS_BUFSIZE    308
@@ -171,3 +175,5 @@ int dhcp_send_kernel_packet(struct dhcp_packet *dhcp_pkt,
 			uint32_t dest_ip, int dest_port);
 int dhcp_l3_socket(int port, const char *interface);
 int dhcp_recv_l3_packet(struct dhcp_packet *packet, int fd);
+char *get_interface_name(int index);
+gboolean interface_is_up(int index);