#ifndef __ETH_RAW_OS_H
#define __ETH_RAW_OS_H
+#define IFNAMSIZ 16
+
/**
* struct eth_sandbox_raw_priv - raw socket session
*
* sd: socket descriptor - the open socket during a session
+ * host_ifname: interface name on the host to use for sending our packets
+ * host_ifindex: interface index number on the host
* device: struct sockaddr_ll - the host interface packets move to/from
* local: 1 or 0 to select the local interface ('lo') or not
* local_bindsd: socket descriptor to prevent the kernel from sending
*/
struct eth_sandbox_raw_priv {
int sd;
+ char host_ifname[IFNAMSIZ];
+ unsigned int host_ifindex;
void *device;
int local;
int local_bind_sd;
unsigned short local_bind_udp_port;
};
-int sandbox_eth_raw_os_start(const char *ifname, unsigned char *ethmac,
- struct eth_sandbox_raw_priv *priv);
+/* A struct to mimic if_nameindex but that does not depend on Linux headers */
+struct sandbox_eth_raw_if_nameindex {
+ unsigned int if_index; /* Index of interface (1, 2, ...) */
+ char *if_name; /* Null-terminated name ("eth0", etc.) */
+};
+
+/* Enumerate host network interfaces */
+struct sandbox_eth_raw_if_nameindex *sandbox_eth_raw_if_nameindex(void);
+/* Free the data structure of enumerated network interfaces */
+void sandbox_eth_raw_if_freenameindex(struct sandbox_eth_raw_if_nameindex *ptr);
+
+/*
+ * Check if the interface named "ifname" is a localhost interface or not.
+ * ifname - the interface name on the host to check
+ *
+ * returns - 0 if real interface, 1 if local, negative if error
+ */
+int sandbox_eth_raw_os_is_local(const char *ifname);
+
+/*
+ * Look up the name of the interface based on the ifindex populated in priv.
+ *
+ * Overwrite the host_ifname member in priv based on looking up host_ifindex
+ *
+ * returns - 0 if success, negative if error
+ */
+int sandbox_eth_raw_os_idx_to_name(struct eth_sandbox_raw_priv *priv);
+
+int sandbox_eth_raw_os_start(struct eth_sandbox_raw_priv *priv,
+ unsigned char *ethmac);
int sandbox_eth_raw_os_send(void *packet, int length,
struct eth_sandbox_raw_priv *priv);
int sandbox_eth_raw_os_recv(void *packet, int *length,