1 files changed, 155 insertions, 0 deletions
diff --git a/src/module.eiface/main.c b/src/module.eiface/main.c
new file mode 100644
index 0000000..4fafa81
--- /dev/null
+++ b/src/module.eiface/main.c
@@ -0,0 +1,155 @@
+#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);
+	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_eiface(&Data.ID, Control) == -1) goto error;
+	char *InterfaceName = getifname(Data.ID, Control);
+	if(InterfaceName == NULL) goto error;
+	int Result = command("ifconfig", "ifconfig", InterfaceName, "name", Name, NULL);
+	free(InterfaceName);
+	if(Result == -1) goto error;
+	close(Control);
+	if(Configuration.inet != NULL) command("ifconfig", "ifconfig", Name, "inet", Configuration.inet, NULL);
+	jprint_state S;
+	bzero(&S, sizeof(S));
+	S.F = stdout;
+	Save_data(&S, &Data);
+	Free_all();
+	return 0;
+error:
+	if(Data.ID != 0) DestroyNetgraphNode(Data.ID, Control);
+	if(Control != -1) close(Control);
+	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);
+	if(*Interface != '\0')
+	{
+		fprintf(stderr, "%s provides only empty interface name\n", Arg0);
+		goto error;
+	}
+	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, "ether");
+	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();
+}