From ae567b86495bf0bbadf19d396df60186979558a4 Mon Sep 17 00:00:00 2001
From: Christian Poessinger <christian@poessinger.com>
Date: Sat, 19 Dec 2020 21:13:34 +0000
Subject: xdp: T2666: use proper xdp_prog_user.c code

---
 src/xdp/xdp_prog_user.c | 47 +++++++++++++++++++++++++++++++++++++++--------
 1 file changed, 39 insertions(+), 8 deletions(-)

diff --git a/src/xdp/xdp_prog_user.c b/src/xdp/xdp_prog_user.c
index d91610791..c47d2977d 100644
--- a/src/xdp/xdp_prog_user.c
+++ b/src/xdp/xdp_prog_user.c
@@ -50,10 +50,34 @@ static const struct option_wrapper long_options[] = {
 	{{0, 0, NULL,  0 }, NULL, false}
 };
 
+static int parse_u8(char *str, unsigned char *x)
+{
+	unsigned long z;
+
+	z = strtoul(str, 0, 16);
+	if (z > 0xff)
+		return -1;
+
+	if (x)
+		*x = z;
+
+	return 0;
+}
+
 static int parse_mac(char *str, unsigned char mac[ETH_ALEN])
 {
-	/* Assignment 3: parse a MAC address in this function and place the
-	 * result in the mac array */
+	if (parse_u8(str, &mac[0]) < 0)
+		return -1;
+	if (parse_u8(str + 3, &mac[1]) < 0)
+		return -1;
+	if (parse_u8(str + 6, &mac[2]) < 0)
+		return -1;
+	if (parse_u8(str + 9, &mac[3]) < 0)
+		return -1;
+	if (parse_u8(str + 12, &mac[4]) < 0)
+		return -1;
+	if (parse_u8(str + 15, &mac[5]) < 0)
+		return -1;
 
 	return 0;
 }
@@ -123,9 +147,11 @@ int main(int argc, char **argv)
 		return EXIT_FAIL_OPTION;
 	}
 
-
-	/* Assignment 3: open the tx_port map corresponding to the cfg.ifname interface */
-	map_fd = -1;
+	/* Open the tx_port map corresponding to the cfg.ifname interface */
+	map_fd = open_bpf_map_file(pin_dir, "tx_port", NULL);
+	if (map_fd < 0) {
+		return EXIT_FAIL_BPF;
+	}
 
 	printf("map dir: %s\n", pin_dir);
 
@@ -135,8 +161,11 @@ int main(int argc, char **argv)
 		bpf_map_update_elem(map_fd, &i, &cfg.redirect_ifindex, 0);
 		printf("redirect from ifnum=%d to ifnum=%d\n", cfg.ifindex, cfg.redirect_ifindex);
 
-		/* Assignment 3: open the redirect_params map corresponding to the cfg.ifname interface */
-		map_fd = -1;
+		/* Open the redirect_params map */
+		map_fd = open_bpf_map_file(pin_dir, "redirect_params", NULL);
+		if (map_fd < 0) {
+			return EXIT_FAIL_BPF;
+		}
 
 		/* Setup the mapping containing MAC addresses */
 		if (write_iface_params(map_fd, src, dest) < 0) {
@@ -144,7 +173,9 @@ int main(int argc, char **argv)
 			return 1;
 		}
 	} else {
-		/* Assignment 4: setup 1-1 mapping for the dynamic router */
+		/* setup 1-1 mapping for the dynamic router */
+		for (i = 1; i < 256; ++i)
+			bpf_map_update_elem(map_fd, &i, &i, 0);
 	}
 
 	return EXIT_OK;
-- 
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