Use bind() instead of setsockopt() for binding raw sockets on Lin…

…ux (#1646)

* Update to `bind()`

* Remove the `struct` keyword

---------

Co-authored-by: Ege Çetin <64282645+egecetin@users.noreply.github.com>

Pcap++/src/RawSocketDevice.cpp

@@ -456,7 +456,7 @@ namespace pcpp
 		int fd = socket(AF_PACKET, SOCK_RAW, htobe16(ETH_P_ALL));
 		if (fd < 0)
 		{
-			PCPP_LOG_ERROR("Failed to create raw socket. Error code was " << errno);
+			PCPP_LOG_ERROR("Failed to create raw socket. Error code was " << strerror(errno));
 			return false;
 		}
 
@@ -505,12 +505,15 @@ namespace pcpp
 		}
 
 		// bind raw socket to interface
-		struct ifreq ifr;
-		memset(&ifr, 0, sizeof(ifr));
-		snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "%s", ifaceName.c_str());
-		if (setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, (void*)&ifr, sizeof(ifr)) == -1)
+		sockaddr_ll saddr;
+		memset(&saddr, 0, sizeof(saddr));
+		saddr.sll_family = AF_PACKET;
+		saddr.sll_protocol = htons(ETH_P_ALL);
+		saddr.sll_ifindex = if_nametoindex(ifaceName.c_str());
+
+		if (bind(fd, reinterpret_cast<sockaddr*>(&saddr), sizeof(saddr)) < 0)
 		{
-			PCPP_LOG_ERROR("Cannot bind raw socket to interface '" << ifaceName << "'");
+			PCPP_LOG_ERROR("Cannot bind raw socket to interface '" << ifaceName << "': " << strerror(errno));
 			::close(fd);
 			return false;
 		}