--- zzzz-none-000/linux-5.15.111/net/ipv4/ip_sockglue.c	2023-05-11 14:00:40.000000000 +0000
+++ puma7-atom-6670-761/linux-5.15.111/net/ipv4/ip_sockglue.c	2024-02-07 10:23:30.000000000 +0000
@@ -53,6 +53,23 @@
  *	SOL_IP control messages.
  */
 
+#ifdef CONFIG_TI_IP_PKTINFO_SOCKOPT
+static void ip_cmsg_recv_ti_pktinfo(struct msghdr *msg, struct sk_buff *skb)
+{
+	struct ti_pktinfo info;
+	struct ethhdr *ehdr;
+# ifdef CONFIG_TI_META_DATA
+	info.ifcpe_side = skb->ti_meta_info;
+# endif
+	ehdr = eth_hdr(skb);
+	memcpy( info.mac_addr, ehdr->h_source, sizeof(info.mac_addr));
+# ifdef CONFIG_TI_META_DATA
+	skb->ti_meta_info=0;
+# endif
+	put_cmsg(msg, SOL_IP, TI_IP_PKTINFO, sizeof(info), &info);
+}
+#endif
+
 static void ip_cmsg_recv_pktinfo(struct msghdr *msg, struct sk_buff *skb)
 {
 	struct in_pktinfo info = *PKTINFO_SKB_CB(skb);
@@ -231,11 +248,21 @@
 			return;
 	}
 
-	if (flags & IP_CMSG_CHECKSUM)
+	if (flags & IP_CMSG_CHECKSUM)  {
 		ip_cmsg_recv_checksum(msg, skb, tlen, offset);
 
+		flags &= ~IP_CMSG_CHECKSUM;
+		if (!flags)
+			return;
+	}
+
 	if (flags & IP_CMSG_RECVFRAGSIZE)
 		ip_cmsg_recv_fragsize(msg, skb);
+
+#ifdef CONFIG_TI_IP_PKTINFO_SOCKOPT
+	if (flags & TI_IP_CMSG_PKTINFO)
+		ip_cmsg_recv_ti_pktinfo(msg, skb);
+#endif
 }
 EXPORT_SYMBOL(ip_cmsg_recv_offset);
 
@@ -317,7 +344,27 @@
 			ipc->tos = val;
 			ipc->priority = rt_tos2priority(ipc->tos);
 			break;
-
+#ifdef CONFIG_TI_IP_PKTINFO_SOCKOPT
+		case TI_IP_PKTINFO:
+		{
+			printk("TI_IP_PKTINFO option is off\n");
+			return -EINVAL;
+		}
+#endif
+#ifdef CONFIG_TI_META_DATA
+		case TI_IP_META_DATA:
+		{
+			unsigned int* ptr_meta_info;
+			if (cmsg->cmsg_len != CMSG_LEN(sizeof(unsigned int)))
+				return -EINVAL;
+			ptr_meta_info = (unsigned int *)CMSG_DATA(cmsg);
+			ipc->ti_meta_info = *ptr_meta_info;
+#ifdef CONFIG_TI_META_DATA_CONSOLE_DUMP
+			printk ("Received Meta-Data:0x%x\n", ipc->ti_meta_info);
+#endif /* CONFIG_TI_META_DATA_CONSOLE_DUMP */
+			break;
+		}
+#endif /* CONFIG_TI_META_DATA */
 		default:
 			return -EINVAL;
 		}
@@ -920,6 +967,9 @@
 	case IP_CHECKSUM:
 	case IP_RECVFRAGSIZE:
 	case IP_RECVERR_RFC4884:
+#ifdef CONFIG_TI_IP_PKTINFO_SOCKOPT
+	case TI_IP_PKTINFO:
+#endif
 		if (optlen >= sizeof(int)) {
 			if (copy_from_sockptr(&val, optval, sizeof(val)))
 				return -EFAULT;
@@ -984,6 +1034,14 @@
 		else
 			inet->cmsg_flags &= ~IP_CMSG_PKTINFO;
 		break;
+#ifdef CONFIG_TI_IP_PKTINFO_SOCKOPT
+	case TI_IP_PKTINFO:
+		if (val)
+			inet->cmsg_flags |= TI_IP_CMSG_PKTINFO;
+		else
+			inet->cmsg_flags &= ~TI_IP_CMSG_PKTINFO;
+		break;
+#endif
 	case IP_RECVTTL:
 		if (val)
 			inet->cmsg_flags |=  IP_CMSG_TTL;
@@ -1566,6 +1624,11 @@
 	case IP_PKTINFO:
 		val = (inet->cmsg_flags & IP_CMSG_PKTINFO) != 0;
 		break;
+#ifdef CONFIG_TI_IP_PKTINFO_SOCKOPT
+	case TI_IP_PKTINFO:
+		val = (inet->cmsg_flags & TI_IP_CMSG_PKTINFO) != 0;
+		break;
+#endif
 	case IP_RECVTTL:
 		val = (inet->cmsg_flags & IP_CMSG_TTL) != 0;
 		break;
@@ -1704,6 +1767,12 @@
 			info.ipi_ifindex = inet->mc_index;
 			put_cmsg(&msg, SOL_IP, IP_PKTINFO, sizeof(info), &info);
 		}
+#ifdef CONFIG_TI_IP_PKTINFO_SOCKOPT
+		if (inet->cmsg_flags & TI_IP_CMSG_PKTINFO) {
+			printk("TI_IP_PKTINFO option is close in this mode\n");
+			return -ENOPROTOOPT;
+		}
+#endif
 		if (inet->cmsg_flags & IP_CMSG_TTL) {
 			int hlim = inet->mc_ttl;
 			put_cmsg(&msg, SOL_IP, IP_TTL, sizeof(hlim), &hlim);