--- zzzz-none-000/linux-5.15.111/net/ipv4/ip_sockglue.c	2023-05-11 14:00:40.000000000 +0000
+++ puma7-arm-6670-761/linux-5.15.111/net/ipv4/ip_sockglue.c	2024-02-07 09:28:09.000000000 +0000
@@ -15,6 +15,10 @@
  *					TOS tweaks.
  *		Mike McLagan	:	Routing by source
  */
+/*
+Includes Intel Corporation's changes/modifications dated: 2014-2019.
+Changed/modified portions - Copyright © 2019, Intel Corporation.
+*/
 
 #include <linux/module.h>
 #include <linux/types.h>
@@ -50,8 +54,32 @@
 #include <linux/bpfilter.h>
 
 /*
- *	SOL_IP control messages.
- */
+* TI Extension:
+*
+* Function:
+*    ip_cmsg_recv_ti_pktinfo(struct msghdr *msg, struct sk_buff *skb)
+*
+*  Decsription:
+*   The function fills the ti_pktinfo structure for the
+*   sending relevant information to the user 
+*/
+ 
+#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)
 {
@@ -231,11 +259,25 @@
 			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);
+		flags &= ~TI_IP_CMSG_PKTINFO;
+		if (!flags)
+			return;
+	}
+#endif
 }
 EXPORT_SYMBOL(ip_cmsg_recv_offset);
 
@@ -317,7 +359,35 @@
 			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;
+
+            /* Validate the length. */
+			if (cmsg->cmsg_len != CMSG_LEN(sizeof(unsigned int)))
+				return -EINVAL;
 
+            /* Store the meta data into the cookie. */
+            ptr_meta_info = (unsigned int *)CMSG_DATA(cmsg);
+            ipc->ti_meta_info = *ptr_meta_info;
+
+            /* Print the Message on the console indicating that the kernel
+             * succesfully received the meta-data information from user-space. */
+#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 +990,9 @@
 	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 +1057,14 @@
 		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 +1647,11 @@
 	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 +1790,15 @@
 			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) {
+			/* struct ti_pktinfo info;
+			info.ifcpe_side = inet->mc_index;  
+			put_cmsg(&msg, SOL_IP, TI_IP_PKTINFO, sizeof(info), &info); */
+			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);