From 1e9887d904280c43c5a92570a07627689c89b48f Mon Sep 17 00:00:00 2001
From: dzwdz
Date: Sun, 5 May 2024 15:20:33 +0200
Subject: net: expose the rtl mac to userland, make the netstack use it

---
 src/cmd/init/init.c         |  2 +-
 src/cmd/netstack/netstack.c | 44 ++++++++++++++++++++++++++++++++++----------
 2 files changed, 35 insertions(+), 11 deletions(-)

(limited to 'src/cmd')

diff --git a/src/cmd/init/init.c b/src/cmd/init/init.c
index 2bef5d8..0a64054 100644
--- a/src/cmd/init/init.c
+++ b/src/cmd/init/init.c
@@ -125,7 +125,7 @@ int main(void) {
 	}
 	MOUNT_AT("/net/") {
 		const char *allow[] = {"/bin/netstack", "/dev/eth/", NULL};
-		const char *argv[] = {"/bin/netstack", "/dev/eth/net", "192.168.0.11", "192.168.0.2", NULL};
+		const char *argv[] = {"/bin/netstack", "/dev/eth/", "192.168.0.11", "192.168.0.2", NULL};
 		MOUNT_AT("/") { fs_whitelist(allow); }
 		execv(argv[0], (void*)argv);
 	}
diff --git a/src/cmd/netstack/netstack.c b/src/cmd/netstack/netstack.c
index a8e011e..3876df9 100644
--- a/src/cmd/netstack/netstack.c
+++ b/src/cmd/netstack/netstack.c
@@ -10,10 +10,7 @@
 #include <string.h>
 #include <thread.h>
 
-struct net_state state = {
-	// TODO dynamically get mac
-	.mac = {0x52, 0x54, 0x00, 0xCA, 0x77, 0x1A},
-};
+struct net_state state = {0};
 
 void network_thread(void *arg) { (void)arg;
 	const size_t buflen = 4096;
@@ -29,24 +26,51 @@ void network_thread(void *arg) { (void)arg;
 void fs_thread(void *arg);
 
 int main(int argc, char **argv) {
+	char *path;
 	if (argc < 4) {
 		fprintf(stderr, "usage: netstack iface ip gateway\n");
 		return 1;
 	}
-	state.raw_h = camellia_open(argv[1], OPEN_RW);
+
+	if (asprintf(&path, "%s/net", argv[1]) < 0) {
+		errx(1, "asprintf failed for some reason");
+	}
+	state.raw_h = camellia_open(path, OPEN_RW);
 	if (state.raw_h < 0) {
-		err(1, "open %s", argv[1]);
+		err(1, "open %s", path);
+		return 1;
+	}
+	free(path);
+
+	if (asprintf(&path, "%s/mac", argv[1]) < 0) {
+		errx(1, "asprintf failed for some reason");
+	}
+	hid_t h = camellia_open(path, OPEN_READ);
+	if (h < 0) {
+		err(1, "open %s", path);
 		return 1;
 	}
+	if (_sys_read(h, state.mac, 6, 0) != 6) {
+		errx(1, "can't read mac", path);
+		return 1;
+	}
+	_sys_close(h);
+	free(path);
+
 	if (ip_parse(argv[2], &state.ip) < 0) {
 		errx(1, "invalid ip: %s", argv[2]);
-		return -1;
+		return 1;
 	}
 	if (ip_parse(argv[3], &state.gateway) < 0) {
-		errx(1, "invalid gateway: %s", argv[2]);
-		return -1;
+		errx(1, "invalid gateway: %s", argv[3]);
+		return 1;
 	}
-	setproctitle(argv[2]);
+
+	setproctitle(
+		"ip=%s gw=%s mac=%02x:%02x:%02x:%02x:%02x:%02x", argv[2], argv[3],
+		state.mac[0], state.mac[1], state.mac[2], state.mac[3], state.mac[4],
+		state.mac[5]
+	);
 	arp_request(state.gateway);
 	thread_create(0, network_thread, NULL);
 	thread_create(0, fs_thread, NULL);
-- 
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