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const c = @cImport({
@cInclude("zaprus.h");
});
fn zigToCMessage(msg: zaprus.Message) !c.SaprusMessage {
return switch (msg) {
.relay => |r| .{
.packet_type = @intFromEnum(msg),
.payload_len = @intCast(r.payload.len),
.headers = .{ .relay = .{
.dest = r.header.dest,
} },
.payload = @constCast(r.payload.ptr),
},
.connection => |con| .{
.packet_type = @intFromEnum(msg),
.payload_len = @intCast(con.payload.len),
.headers = .{ .connection = .{
.src_port = con.header.src_port,
.dest_port = con.header.dest_port,
.seq_num = con.header.seq_num,
.msg_id = con.header.msg_id,
._reserved = con.header.reserved,
.options = @bitCast(con.header.options),
} },
.payload = @constCast(con.payload.ptr),
},
.file_transfer => return zaprus.Error.NotImplementedSaprusType,
else => return zaprus.Error.UnknownSaprusType,
};
}
fn cToZigMessage(msg: c.SaprusMessage) !zaprus.Message {
const msg_type: zaprus.PacketType = @enumFromInt(msg.packet_type);
return switch (msg_type) {
.relay => .{
.relay = .{
.header = .{
.dest = msg.headers.relay.dest[0..4].*,
},
.payload = msg.payload[0..msg.payload_len],
},
},
.connection => .{
.connection = .{
.header = .{
.src_port = msg.headers.connection.src_port,
.dest_port = msg.headers.connection.dest_port,
.seq_num = msg.headers.connection.seq_num,
.msg_id = msg.headers.connection.msg_id,
.reserved = msg.headers.connection._reserved,
.options = @bitCast(msg.headers.connection.options),
},
.payload = msg.payload[0..msg.payload_len],
},
},
.file_transfer => return zaprus.Error.NotImplementedSaprusType,
else => return zaprus.Error.UnknownSaprusType,
};
}
// client
export fn zaprus_init() c_int {
SaprusClient.init() catch return 1;
return 0;
}
export fn zaprus_deinit() c_int {
SaprusClient.deinit();
return 0;
}
export fn zaprus_send_relay(payload: [*]const u8, len: usize, dest: [*]u8) c_int {
SaprusClient.sendRelay(payload[0..len], dest[0..4].*, allocator) catch return 1;
return 0;
}
export fn zaprus_send_initial_connection(payload: [*]const u8, len: usize, initial_port: u16) c_int {
_ = SaprusClient.sendInitialConnection(payload[0..len], initial_port, allocator) catch return 1;
return 0;
}
export fn zaprus_connect(payload: [*]const u8, len: usize) ?*c.SaprusMessage {
if (SaprusClient.connect(payload[0..len], allocator)) |msg| {
var m = zigToCMessage(msg) catch return null;
return &m;
} else |_| {
return null;
}
}
// message
/// ptr should be freed by the caller.
export fn zaprus_message_to_bytes(msg: c.SaprusMessage, ptr: *[*]u8, len: *usize) c_int {
var m = cToZigMessage(msg) catch return 1;
const bytes = m.toBytes(allocator) catch return 1;
ptr.* = bytes.ptr;
len.* = bytes.len;
return 0;
}
/// Return value should be destroyed with zaprus_message_deinit.
export fn zaprus_message_from_bytes(bytes: [*]const u8, len: usize) ?*c.SaprusMessage {
if (zaprus.Message.fromBytes(bytes[0..len], allocator)) |msg| {
var m = zigToCMessage(msg) catch return null;
return &m;
} else |_| return null;
}
export fn zaprus_message_deinit(msg: *c.SaprusMessage) void {
if (cToZigMessage(msg.*)) |m| {
m.deinit(allocator);
} else |_| unreachable;
}
const std = @import("std");
const zaprus = @import("./root.zig");
const SaprusClient = zaprus.Client;
const allocator = std.heap.c_allocator;
test {
std.testing.refAllDeclsRecursively(@This());
}
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