fix: MCPCをvendored fork化しMCP準拠と接続安定性を改善

- Git submoduleを廃止してMCPCを直接管理
- Windowsで254リクエスト付近に発生する切断を修正
- JSON-RPC 2.0エラー応答を標準化
- tool schemaとruntimeの必須・任意引数を一致
- 1000回連続呼び出しの回帰テストを追加

1 files changed, 196 insertions, 0 deletions

diff --git a/third_party/mcpc/src/server.h b/third_party/mcpc/src/server.h
new file mode 100644
index 0000000..e2c4141
--- /dev/null
+++ b/third_party/mcpc/src/server.h
@@ -0,0 +1,196 @@
+// This file is part of the mcpc library.
+//
+// Copyright (C) 2025 Michael Lee <micl2e2 AT proton.me>
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy of
+// this software and associated documentation files (the "Software"), to deal in
+// the Software without restriction, including without limitation the rights to
+// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+// the Software, and to permit persons to whom the Software is furnished to do so,
+// subject to the following conditions: 
+// 
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software. 
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+#ifndef h_server
+#define h_server
+
+#include <mcpc/visb.h>
+#include <mcpc/server.h>
+
+#include "ext_stdint.h"
+
+#include "errcode.h"
+#include "mjson.h"
+#include "rsc.h"
+#include "tool.h"
+#include "prmpt.h"
+
+#include <stdio.h>
+
+#if is_win
+#include <winsock2.h>
+typedef i32_t socklen_t;
+#endif
+
+#define BUFFER_SIZE 1024
+#define PORT 8080
+
+// ------------------------------ conn ------------------------------
+
+enum mcpc_conn_type
+{
+  MCPC_CONN_FD,
+  MCPC_CONN_STRM,
+};
+typedef enum mcpc_conn_type mcpc_conn_type_t;
+
+#if defined(is_unix)
+typedef int mcpc_sock_t;
+#elif is_win
+typedef SOCKET mcpc_sock_t;
+#endif
+
+static inline bool
+mcpc_sock_invalid (mcpc_sock_t sock)
+{
+#if defined(is_unix)
+  return sock < 0;
+#endif
+#if is_win
+  return sock == INVALID_SOCKET;
+#endif
+}
+
+enum mcpc_init_stat
+{
+  MCPC_INIT_NONE = 0,
+  MCPC_INIT_BEG,
+  MCPC_INIT_FAIL,
+  MCPC_INIT_SUCC,
+};
+typedef enum mcpc_init_stat mcpc_init_stat_t;
+
+typedef struct mcpc_conn mcpc_conn_t;
+struct mcpc_conn
+{
+  mcpc_conn_type_t typ;
+  union
+  {
+    mcpc_sock_t fd;
+    FILE *strm;
+  };
+  const ch8_t *cname;
+  u8_t cname_len;
+  mcpc_init_stat_t client_init;
+  mcpc_conn_t *nex;
+};
+
+typedef uint8_t mcpc_connpool_size_t;
+
+typedef struct mcpc_connpool mcpc_connpool_t;
+struct mcpc_connpool
+{
+  const mcpc_connpool_size_t cap;
+  mcpc_connpool_size_t len;
+  mcpc_conn_t *head;
+};
+
+// ----------------------------- server -----------------------------
+
+enum mcpc_server_type
+{
+  MCPC_SV_NONE = 0,
+  MCPC_SV_IOSTRM,
+  MCPC_SV_STDIO,
+  MCPC_SV_TCP,
+};
+typedef enum mcpc_server_type mcpc_server_type_t;
+
+struct mcpc_server
+{
+  mcpc_server_type_t typ;
+  const ch8_t *name;
+  u8_t name_len;
+  const ch8_t *ver;
+  u8_t ver_len;
+  u16_t capa;
+  const mcpc_toolpool_t *toolpool;
+  const mcpc_prmptpool_t *prmptpool;
+  const mcpc_rscpool_t *rscpool;
+  struct mjson_fixedbuf rpcres;
+  const mcpc_connpool_t *connpool;
+};
+// implication: for iostrm server, the first conn will be used as client init status storing
+// check mcpc_connpool_find_by_sock
+
+#define MCPC_CAPA_PRMT         0b0000000000000001
+#define MCPC_CAPA_PRMT_LISTCHG 0b0000000000000011
+#define MCPC_CAPA_TOOL         0b0000000000010000
+#define MCPC_CAPA_TOOL_LISTCHG 0b0000000000110000
+#define MCPC_CAPA_RSC          0b0000000100000000
+#define MCPC_CAPA_RSC_LISTCHG  0b0000001100000000
+#define MCPC_CAPA_RSC_SUBSRC   0b0000010100000000
+#define MCPC_CAPA_COMPLT       0b0001000000000000
+
+mcpc_server_t *mcpc_server_new (mcpc_server_type_t typ, mcpc_toolpool_t * toolpool, u32_t vargs_beg, ...);
+
+mcpc_server_t *mcpc_server_new_stdio ();
+
+/* void _handle_tools_list(mcpc_server_t *sv, struct jsonrpc_request *r); */
+
+/* void _handle_tools_call(mcpc_server_t *sv, struct jsonrpc_request *r); */
+
+mcpc_errcode_t mcpc_server_cleanup_rpcres (mcpc_server_t * sv);
+
+void handle_inone (mcpc_server_t * sv, const char *const rbuf, size_t nread, mcpc_sock_t csock);
+
+bool mcpc_server_supp_prompts (const mcpc_server_t * sv);
+
+bool mcpc_server_supp_prompts_lschg (const mcpc_server_t * sv);
+
+bool mcpc_server_supp_tools (const mcpc_server_t * sv);
+
+bool mcpc_server_supp_tools_lschg (const mcpc_server_t * sv);
+
+bool mcpc_server_supp_rscs (const mcpc_server_t * sv);
+
+bool mcpc_server_supp_rscs_lschg (const mcpc_server_t * sv);
+
+bool mcpc_server_supp_rscs_subs (const mcpc_server_t * sv);
+
+enum mcpc_metho
+{
+  MCPC_METHO_UNKNOWN = 0,
+  MCPC_METHO_INITBEG,
+  MCPC_METHO_INITDONE,
+  MCPC_METHO_LISTTOOL,
+  MCPC_METHO_CALLTOOL,
+  MCPC_METHO_LSRSC,
+  MCPC_METHO_PRMPT_LS,
+  MCPC_METHO_PRMPT_CALL,
+  MCPC_METHO_COMPLT_COMPLT,
+};
+typedef enum mcpc_metho mcpc_metho_t;
+
+// ---------------------------- connpool ----------------------------
+
+mcpc_conn_t *mcpc_conn_new (mcpc_conn_type_t typ, void *back);
+
+FILE *mcpc_conn_getstrm (mcpc_conn_t * conn);
+
+int mcpc_conn_getfd (mcpc_conn_t * conn);
+
+// TODO private
+mcpc_errcode_t mcpc_connpool_addref (mcpc_connpool_t * connpool, mcpc_conn_t * conn);
+
+mcpc_conn_t *mcpc_connpool_getconn (const mcpc_connpool_t * connpool, const mcpc_connpool_size_t idx);
+
+#endif