ncsid: Import from gBMC
This is the initial code drop from gBMC.
Google-Bug-Id: 179618516
Upstream: 1e71af914bc8c54d8b91d0a1cf377e2696713c2f
Change-Id: Ic653e8271dacd205e04f2bc713071ef2ec5936a4
Signed-off-by: William A. Kennington III <wak@google.com>
diff --git a/ncsid/src/net_iface.h b/ncsid/src/net_iface.h
new file mode 100644
index 0000000..ebd6edc
--- /dev/null
+++ b/ncsid/src/net_iface.h
@@ -0,0 +1,96 @@
+#pragma once
+
+#include <linux/if.h>
+#include <linux/if_packet.h>
+#include <net/ethernet.h>
+#include <netinet/in.h>
+#include <sys/ioctl.h>
+#include <sys/socket.h>
+
+#include <functional>
+#include <string>
+
+namespace net
+{
+
+class IFaceBase
+{
+ public:
+ explicit IFaceBase(const std::string& name);
+ virtual ~IFaceBase() = default;
+
+ /** @brief Get the index of the network interface corresponding
+ * to this object.
+ */
+ int get_index() const;
+
+ /** @brief Set interface flags using provided socket.
+ *
+ * @param[in] sockfd - Socket to use for SIOCSIFFLAGS ioctl call.
+ * @param[in] flags - Flags to set.
+ */
+ int set_sock_flags(int sockfd, short flags) const;
+
+ /** @brief Clear interface flags using provided socket.
+ *
+ * @param[in] sockfd - Socket to use for SIOCSIFFLAGS/SIOCGIFFLAGS
+ * ioctl call.
+ * @param[in] flags - Flags to clear.
+ */
+ int clear_sock_flags(int sockfd, short flags) const;
+
+ /** @brief Bind given socket to this interface. Similar to bind
+ * syscall, except that it fills in sll_ifindex field
+ * of struct sockaddr_ll with the index of this interface.
+ */
+ virtual int bind_sock(int sockfd, struct sockaddr_ll* saddr) const = 0;
+
+ protected:
+ std::string name_;
+
+ private:
+ /** @brief Similar to ioctl syscall, but the socket is created inside
+ * the function and the interface name in struct ifreq is
+ * properly populated with the index of this interface.
+ */
+ virtual int ioctl(int request, struct ifreq* ifr) const = 0;
+
+ /** @brief Similar to ioctl syscall. The interface index in
+ * struct ifreq is
+ * properly populated with the index of this interface.
+ */
+ virtual int ioctl_sock(int sockfd, int request,
+ struct ifreq* ifr) const = 0;
+
+ /** @brief Modify interface flags, using the given socket for
+ * ioctl call.
+ */
+ int mod_sock_flags(int sockfd, short flags, bool set) const;
+};
+
+class IFace : public IFaceBase
+{
+ public:
+ explicit IFace(const std::string& name) : IFaceBase(name)
+ {}
+
+ /** @brief Bind given socket to this interface. Similar to bind
+ * syscall, except that it fills in sll_ifindex field
+ * of struct sockaddr_ll with the index of this interface.
+ */
+ int bind_sock(int sockfd, struct sockaddr_ll* saddr) const override;
+
+ private:
+ /** @brief Similar to ioctl syscall, but the socket is created inside
+ * the function and the interface name in struct ifreq is
+ * properly populated with the index of this interface.
+ */
+ int ioctl(int request, struct ifreq* ifr) const override;
+ /** @brief Similar to ioctl syscall. The interface index in
+ * struct ifreq is
+ * properly populated with the index of this interface.
+ */
+ int ioctl_sock(int sockfd, int request, struct ifreq* ifr) const override;
+};
+
+} // namespace net