From f1e579bc427df418af96da61498fe0cdb4cecb69 Mon Sep 17 00:00:00 2001
From: dautor <karlo98.m@gmail.com>
Date: Sun, 17 Nov 2024 20:53:51 +0100
Subject: Add COPYRIGHT and rename module directories

---
 src/module.bridge/main.c | 166 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 166 insertions(+)
 create mode 100644 src/module.bridge/main.c

(limited to 'src/module.bridge/main.c')

diff --git a/src/module.bridge/main.c b/src/module.bridge/main.c
new file mode 100644
index 0000000..fbfb500
--- /dev/null
+++ b/src/module.bridge/main.c
@@ -0,0 +1,166 @@
+#include "../module/module.h"
+#include "../util.h"
+#include "state.h"
+
+#include <netgraph.h>
+
+char const *Usage = "usage: %1$s start        [name] [configuration]\n"
+                    "       %1$s stop         [name] [configuration] [data]\n"
+                    "       %1$s get-endpoint [name] [configuration] [data] [interface]\n"
+                    "unsupported commands: cmd mod\n";
+
+static configuration Configuration;
+static data          Data;
+static bool          ConfigurationLoaded;
+static bool          DataLoaded;
+
+// HELPERS
+
+static void
+Free_all(void)
+{
+	if(ConfigurationLoaded == true) Free_configuration(&Configuration);
+	if(DataLoaded == true) Free_data(&Data);
+}
+
+static void
+Load_configuration(ucl_object_t *root)
+{
+	char *Error = Parse_configuration(&Configuration, root, "");
+	if(Error != NULL)
+	{
+		fprintf(stderr, "%s: configuration error: %s\n", Arg0, Error);
+		free(Error);
+		Free_all();
+		exit(-1);
+	}
+	ConfigurationLoaded = true;
+}
+
+static void
+Load_data(ucl_object_t *root)
+{
+	char *Error = Parse_data(&Data, root, "");
+	if(Error != NULL)
+	{
+		fprintf(stderr, "%s: data error: %s\n", Arg0, Error);
+		free(Error);
+		Free_all();
+		exit(-1);
+	}
+	DataLoaded = true;
+	// TODO: check that data matches configuration
+}
+
+// COMMANDS
+
+int
+start(char const *Name, ucl_object_t *configuration)
+{
+	UNUSED(Name);
+	Load_configuration(configuration);
+	// Implement
+	Data.ID    = 0;
+	fd Control = -1;
+	if(NgMkSockNode(NULL, &Control, NULL) == -1)
+	{
+		fprintf(stderr, "Failed to create netgraph socket: %s\n", strerror(errno));
+		goto error;
+	}
+	if(Create_bridge(&Data.ID, Control) == -1) goto error;
+	close(Control);
+	jprint_state S;
+	bzero(&S, sizeof(S));
+	S.F = stdout;
+	Save_data(&S, &Data);
+	Free_all();
+	return 0;
+error:
+	Free_all();
+	return -1;
+}
+
+int
+stop(char const *Name, ucl_object_t *configuration, ucl_object_t *data)
+{
+	UNUSED(Name);
+	Load_configuration(configuration);
+	Load_data(data);
+	fd Control = -1;
+	if(NgMkSockNode(NULL, &Control, NULL) == -1)
+	{
+		fprintf(stderr, "Failed to create netgraph socket: %s\n", strerror(errno));
+		goto error;
+	}
+	if(DestroyNetgraphNode(Data.ID, Control) == -1) goto error;
+	Free_all();
+	return 0;
+error:
+	Free_all();
+	return -1;
+}
+
+int
+get_endpoint(char const *Name, ucl_object_t *configuration, ucl_object_t *data, char const *Interface)
+{
+	UNUSED(Name);
+	Load_configuration(configuration);
+	Load_data(data);
+	size_t linkNum;
+	if(strncmp(Interface, "link", __builtin_strlen("link")) == 0)
+	{
+		char const *N = Interface + __builtin_strlen("link");
+		linkNum       = strtoul(N, NULL, 10);
+		if(linkNum == 0 && errno == EINVAL)
+		{
+			fprintf(stderr, "invalid interface %s\n", Interface);
+			goto error;
+		}
+	} else if(strncmp(Interface, "uplink", __builtin_strlen("uplink")) == 0)
+	{
+		char const *N = Interface + __builtin_strlen("uplink");
+		linkNum       = strtoul(N, NULL, 10);
+		if(linkNum == 0)
+		{
+			fprintf(stderr, "unknown interface %s\n", Interface);
+			goto error;
+		}
+	} else
+	{
+		fprintf(stderr, "unknown interface %s\n", Interface);
+	}
+	jprint_state S;
+	bzero(&S, sizeof(S));
+	S.F = stdout;
+	JPrintObjectBegin(&S);
+	JPrintMember(&S, "address");
+	char Address[NG_PATHSIZ];
+	snprintf(Address, sizeof(Address), "[%x]:", Data.ID);
+	JPrint_string(&S, Address);
+	JPrintMember(&S, "hook");
+	JPrint_string(&S, Interface);
+	JPrintObjectEnd(&S);
+	Free_all();
+	return 0;
+error:
+	Free_all();
+	return -1;
+}
+
+int
+cmd(char const *Name, ucl_object_t *configuration, ucl_object_t *data, size_t ArgCount, char **Arg)
+{
+	UNUSED(Name, ArgCount, Arg);
+	Load_configuration(configuration);
+	Load_data(data);
+	usage();
+}
+
+int
+mod(char const *Name, ucl_object_t *configuration, ucl_object_t *data, size_t ArgCount, char **Arg)
+{
+	UNUSED(Name, ArgCount, Arg);
+	Load_configuration(configuration);
+	Load_data(data);
+	usage();
+}
-- 
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