gnunet-zig

commit 6ae76988cd09422fbf866559645b70715e53631c
parent ea0f36da8cc34b10866763847ef2ce4b47a70fd8
Author: Martin Schanzenbach <schanzen@gnunet.org>
Date:   Wed, 29 Jan 2025 15:27:39 +0100

add service example

Diffstat:
M
build.zig
 | 
24
+++++++++++++++++++-----
A
src/gnunet-service-zig.zig
 | 
53
+++++++++++++++++++++++++++++++++++++++++++++++++++++

2 files changed, 72 insertions(+), 5 deletions(-)
diff --git a/build.zig b/build.zig
@@ -17,13 +17,21 @@ pub fn build(b: *std.Build) !void {
         "additional-lib-paths",
         "Path to additional libs",
     ) orelse "";
-
+    const target = b.standardTargetOptions(.{});
+    const optimize = b.standardOptimizeOption(.{});
     const exe = b.addExecutable(.{
-        .name = "gnunet-zig-identity",
+        .name = "gnunet-identity",
         .root_source_file = b.path("src/gnunet.zig"),
-        .target = b.standardTargetOptions(.{}),
-        .optimize = b.standardOptimizeOption(.{}),
-        .strip = true,
+        .target = target,
+        .optimize = optimize,
+        .strip = false, // TODO make option
+    });
+    const svc_exe = b.addExecutable(.{
+        .name = "gnunet-service-zig",
+        .root_source_file = b.path("src/gnunet-service-zig.zig"),
+        .target = target,
+        .optimize = optimize,
+        .strip = false, // TODO make option
     });
     // create our general purpose allocator
     var gpa = std.heap.GeneralPurposeAllocator(.{}){};
@@ -39,4 +47,10 @@ pub fn build(b: *std.Build) !void {
     exe.linkSystemLibrary("gnunetutil");
     exe.linkSystemLibrary("gnunetidentity");
     b.installArtifact(exe);
+    svc_exe.addIncludePath(.{ .cwd_relative = gnunet_include_path });
+    svc_exe.addLibraryPath(.{ .cwd_relative = gnunet_lib_path });
+    svc_exe.addIncludePath(.{ .cwd_relative = additional_include_paths });
+    svc_exe.addLibraryPath(.{ .cwd_relative = additional_lib_paths });
+    svc_exe.linkSystemLibrary("gnunetutil");
+    b.installArtifact(svc_exe);
 }
diff --git a/src/gnunet-service-zig.zig b/src/gnunet-service-zig.zig
@@ -0,0 +1,53 @@
+const gnunet = @cImport({
+    @cInclude("gnunet/gnunet_util_lib.h");
+});
+
+const std = @import("std");
+const print = std.debug.print;
+
+var id_svc: ?*gnunet.GNUNET_IDENTITY_Handle = undefined;
+
+pub fn do_shutdown(cls: ?*anyopaque) callconv(.C) void {
+    _ = cls;
+    std.debug.print("Shutting down!\n", .{});
+}
+
+pub fn client_conn(cls: ?*anyopaque, c: ?*gnunet.GNUNET_SERVICE_Client, mq: ?*gnunet.GNUNET_MQ_Handle) callconv(.C) ?*anyopaque {
+    _ = cls;
+    _ = c;
+    _ = mq;
+    return null;
+}
+
+pub fn client_disco(cls: ?*anyopaque, c: ?*gnunet.GNUNET_SERVICE_Client, internal_cls: ?*anyopaque) callconv(.C) void {
+    _ = cls;
+    _ = c;
+    _ = internal_cls;
+}
+
+pub fn run(cls: ?*anyopaque, cfg: ?*const gnunet.GNUNET_CONFIGURATION_Handle, svc: ?*gnunet.GNUNET_SERVICE_Handle) callconv(.C) void {
+    // Explicit discard, C compiler usually only warns, zig errors out!
+    _ = svc;
+    _ = cfg;
+    // Recover closure from anonymous anyopaque
+    const hi: [*:0]u8 = @as([*:0]u8, @ptrCast(cls));
+    std.debug.print("{s}\n", .{hi});
+    // This does a lot of stuff internally, opening UDS, sending/receiving messages etc.
+    _ = gnunet.GNUNET_SCHEDULER_add_shutdown(do_shutdown, null);
+    return;
+}
+
+pub fn main() !u8 {
+    // you are an anonymous empty object
+    const argv = std.os.argv;
+    const c_ptr: [*c][*c]u8 = @ptrCast(argv.ptr);
+    const hi = "hihihi";
+
+    const mh: *const gnunet.GNUNET_MQ_MessageHandler = &.{};
+    const ret = gnunet.GNUNET_SERVICE_run_(gnunet.GNUNET_OS_project_data_gnunet(), @intCast(std.os.argv.len), c_ptr, "zig-example", gnunet.GNUNET_SERVICE_OPTION_NONE, &run, &client_conn, &client_disco, @constCast(hi), mh);
+    if (ret != 0) {
+        std.debug.print("Return val: {d}, expected: {d}\n", .{ ret, gnunet.GNUNET_OK });
+    }
+    return @intCast(ret);
+    //try stdout.writeAll(res);
+}