diff --git a/include/wamr.h b/include/wamr.h
index 03a534b..0e91331 100644
--- a/include/wamr.h
+++ b/include/wamr.h
@@ -8,10 +8,11 @@
 #include "bh_read_file.h"
 #include "logging.h"
 #include "wamr_exec_env.h"
-#include "wamr_export.h"
 #include "wamr_read_write.h"
-#include "wasm_export.h"
+#include "wamr_wasi_context.h"
 #include "wasm_runtime.h"
+#include "wamr_export.h"
+#include <tuple>
 
 class WAMRInstance {
     WASMExecEnv *exec_env{};
@@ -29,6 +30,7 @@ class WAMRInstance {
     std::vector<const char *> ns_pool_;
     std::map<int, std::tuple<std::string,int, int>> fd_map_;
     // add offset to pair->tuple, 3rd param 'int'
+    std::map<int, SocketMetaData> socket_fd_map_;
     bool is_jit;
     char *buffer{};
     char error_buf[128]{};
@@ -56,7 +58,8 @@ class WAMRInstance {
                        const std::vector<std::string> &addr_list, const std::vector<std::string> &ns_lookup_pool);
 
     int invoke_main();
-    int invoke_open(uint32 fd,const std::string& path, uint32 option);
+    int invoke_fopen(uint32 fd,const std::string& path, uint32 option);
+    int invoke_fseek(uint32 fd, uint32 offset);
     int invoke_preopen(uint32 fd,const std::string& path);
     ~WAMRInstance();
 };
diff --git a/include/wamr_export.h b/include/wamr_export.h
index c54c1e3..2a87e54 100644
--- a/include/wamr_export.h
+++ b/include/wamr_export.h
@@ -2,16 +2,20 @@
 // Created by victoryang00 on 6/17/23.
 //
 
+
 #ifdef __cplusplus
 extern "C" {
 #endif
 #ifdef MVVM_WASI
 #include "wasm_runtime.h"
-void serialize_to_file(struct WASMExecEnv*);
+void serialize_to_file(struct WASMExecEnv *);
 #endif
+
+
 void insert_fd(int, char const *, int, int);
 void remove_fd(int);
-void insert_socket(char const *, int);
+void insert_socket(int, int, int, int);
+void update_socket_fd_address(int, struct SocketAddrPool *);
 void remove_socket(char const *); // see whether there's socket maintainance impl in wasi?
 void insert_lock(char const *, int);
 void insert_sem(char const *, int);
diff --git a/include/wamr_wasi_context.h b/include/wamr_wasi_context.h
index ac618be..51bca1c 100644
--- a/include/wamr_wasi_context.h
+++ b/include/wamr_wasi_context.h
@@ -6,6 +6,7 @@
 #define MVVM_WAMR_WASI_CONTEXT_H
 
 #include "logging.h"
+#include "platform_common.h"
 #include "wamr_serializer.h"
 #include "wasm_runtime.h"
 #include <atomic>
@@ -28,8 +29,15 @@ struct WAMRAddrPool {
     bool is_4;
     uint8 mask;
 };
+
+struct SocketMetaData {
+    int domain{};
+    int type{};
+    int protocol{};
+    SocketAddrPool socketAddress;
+};
+
 struct WAMRWASIContext {
-    std::map<uint32, std::pair<std::string,int>> fd_map;
     std::vector<std::string> dir;
     std::vector<std::string> map_dir;
     WAMRArgvEnvironValues argv_environ;
diff --git a/lib/wasm-micro-runtime b/lib/wasm-micro-runtime
index a46c417..15ee584 160000
--- a/lib/wasm-micro-runtime
+++ b/lib/wasm-micro-runtime
@@ -1 +1 @@
-Subproject commit a46c41708fd634c89e13ad138978e915d35d1686
+Subproject commit 15ee5849d63cf2856a0e0b8faa1ff55bee576978
diff --git a/src/checkpoint.cpp b/src/checkpoint.cpp
index 99cf6f2..8a4cce7 100644
--- a/src/checkpoint.cpp
+++ b/src/checkpoint.cpp
@@ -4,6 +4,8 @@
 
 #include "thread_manager.h"
 #include "wamr.h"
+#include "wamr_wasi_context.h"
+#include "wasm_runtime.h"
 #include <cstdio>
 #include <cxxopts.hpp>
 #include <fstream>
@@ -44,8 +46,6 @@ void insert_fd(int fd, const char *path, int flags, int offset) {
         wamr->fd_map_.insert(std::make_pair(fd, std::make_tuple(std::string(path), flags, offset)));
 }
 
-/* update fd->offset**/
-void insert_fd_fseek();
 /**fclose */
 void remove_fd(int fd) {
     if (wamr->fd_map_.find(fd) != wamr->fd_map_.end())
@@ -53,9 +53,60 @@ void remove_fd(int fd) {
     else
         LOGV(ERROR)<< "fd not found" << fd;
 }
-void insert_socket(int fd){
 
+/*
+    create fd-socketmetadata map and store the "domain", "type", "protocol" value
+*/
+void insert_socket(int fd, int domain, int type, int protocol){
+    printf("\n #insert_socket(fd, domain, type, protocol) %d %d %d %d \n\n",fd, domain, type, protocol);
+    
+    if (wamr->socket_fd_map_.find(fd) != wamr->socket_fd_map_.end()) {
+        LOGV(ERROR) << "socket_fd already exist" << fd;
+    } else{
+        SocketMetaData metaData{};
+        metaData.domain = domain;
+        metaData.type = type;
+        metaData.protocol = protocol;
+        wamr->socket_fd_map_.insert(std::make_pair(fd, metaData));
+    }
+}
+
+void update_socket_fd_address(int fd, SocketAddrPool *address) {
+     printf("\n #update_socket_fd_address(fd, address) %d \n\n",fd);
+     
+    if (wamr->socket_fd_map_.find(fd) == wamr->socket_fd_map_.end()) {
+        // note: ? fd here is not same as insert_socket?
+        // set default value
+        insert_socket(fd, 0, 0, 0);
+    } 
+
+    SocketMetaData metaData{};
+    metaData.domain = wamr->socket_fd_map_[fd].domain;
+    metaData.type = wamr->socket_fd_map_[fd].type;
+    metaData.protocol = wamr->socket_fd_map_[fd].protocol;
+    
+    metaData.socketAddress.port = address->port;
+    if(address->is_4) {
+        metaData.socketAddress.is_4 = true;
+        metaData.socketAddress.ip4[0] = address->ip4[0];
+        metaData.socketAddress.ip4[1] = address->ip4[1];
+        metaData.socketAddress.ip4[2] = address->ip4[2];
+        metaData.socketAddress.ip4[3] = address->ip4[3];
+
+    } else {
+        metaData.socketAddress.ip6[0] = address->ip6[0];
+        metaData.socketAddress.ip6[1] = address->ip6[1];
+        metaData.socketAddress.ip6[2] = address->ip6[2];
+        metaData.socketAddress.ip6[3] = address->ip6[3];
+        metaData.socketAddress.ip6[4] = address->ip6[4];
+        metaData.socketAddress.ip6[5] = address->ip6[5];
+        metaData.socketAddress.ip6[6] = address->ip6[6];
+        metaData.socketAddress.ip6[7] = address->ip6[7];
+    }
+    wamr->socket_fd_map_[fd] = metaData;
+      
 }
+
 void serialize_to_file(WASMExecEnv *instance) {
     /** Sounds like AoT/JIT is in this?*/
     // Note: insert fd
diff --git a/src/restore.cpp b/src/restore.cpp
index c117807..23635f5 100644
--- a/src/restore.cpp
+++ b/src/restore.cpp
@@ -6,6 +6,7 @@
 #include "wamr.h"
 #include "wamr_exec_env.h"
 #include "wamr_read_write.h"
+#include "wasm_runtime.h"
 #include <cxxopts.hpp>
 #include <iostream>
 #include <memory>
@@ -16,7 +17,8 @@ WAMRInstance *wamr = nullptr;
 void insert_fd(int fd, const char *path, int flags, int offset){};
 void remove_fd(int fd) {}
 void serialize_to_file(WASMExecEnv *instance) {}
-void insert_socket(char const *, int){};
+void insert_socket(int fd, int domain, int type, int protocol){};
+void update_socket_fd_address(int fd, SocketAddrPool *address){};
 void remove_socket(char const *){};
 void insert_lock(char const *, int){};
 void insert_sem(char const *, int){};
diff --git a/src/wamr.cpp b/src/wamr.cpp
index 8f362c8..52945fe 100644
--- a/src/wamr.cpp
+++ b/src/wamr.cpp
@@ -77,7 +77,7 @@ int WAMRInstance::invoke_main() {
 
     return wasm_runtime_call_wasm(exec_env, func, 0, nullptr);
 }
-int WAMRInstance::invoke_open(uint32 fd, const std::string &path, uint32 option) {
+int WAMRInstance::invoke_fopen(uint32 fd, const std::string &path, uint32 option) {
     if (!(func = wasm_runtime_lookup_function(module_inst, "open", "($i)i"))) {
         LOGV(ERROR) << "The wasi open function is not found.";
         return -1;
@@ -97,6 +97,20 @@ int WAMRInstance::invoke_open(uint32 fd, const std::string &path, uint32 option)
     }
     return -1;
 };
+int WAMRInstance::invoke_fseek(uint32 fd, uint32 offset) {
+    if (!(func = wasm_runtime_lookup_function(module_inst, "fseek", "($i)i"))) {
+        LOGV(ERROR) << "The wasi open function is not found.";
+        return -1;
+    }
+    char *buffer_ = nullptr;
+    uint32_t buffer_for_wasm;
+
+    buffer_for_wasm = wasm_runtime_module_malloc(module_inst, 100, reinterpret_cast<void **>(&buffer_));
+    if (buffer_for_wasm != 0) {
+        uint32 argv[2];
+    }
+    return -1;
+};
 int WAMRInstance::invoke_preopen(uint32 fd, const std::string &path) {
     auto name = "__wasilibc_register_preopened_fd";
     if (!(func = wasm_runtime_lookup_function(module_inst, name, nullptr))) {
@@ -224,6 +238,7 @@ void WAMRInstance::set_wasi_args(const std::vector<std::string> &dir_list, const
     wasm_runtime_set_wasi_addr_pool(module, addr_.data(), addr_.size());
     wasm_runtime_set_wasi_ns_lookup_pool(module, ns_pool_.data(), ns_pool_.size());
 }
+void restart_execution(uint32 id) {}
 void WAMRInstance::set_wasi_args(WAMRWASIContext &context) {
     auto get_addr_from_context = [](const WAMRWASIContext &wasiContext) {
         auto addr_pool = std::vector<std::string>(wasiContext.addr_pool.size());
diff --git a/src/wamr_wasi_context.cpp b/src/wamr_wasi_context.cpp
index bb7b284..ade43c5 100644
--- a/src/wamr_wasi_context.cpp
+++ b/src/wamr_wasi_context.cpp
@@ -11,128 +11,9 @@ void WAMRWASIContext::dump_impl(WASIContext *env) {
     for (int i = 0; i < wamr->map_dir_.size(); i++) {
         map_dir.emplace_back(wamr->map_dir_[i]);
     }
-    for (auto [fd, res] : this->fd_map) {
-        // differ from path from file
-        LOGV(DEBUG)<<fmt::format("fd:{} path:{} option",fd,res.first);
-    }
-
-#if 0
-    // Need to open the file and reinitialize the file descripter by map.
-    this->curfds.size = env->curfds->size;
-    this->curfds.used = env->curfds->used;
-    wasi_fd_entry *entry = ((wasi_fd_entry *)env->curfds->entries);
-    for (int i = 0; i < env->curfds->size; i++) {
-        auto dumped_fo = WAMRFDObjectEntry();
-        if (entry[i].object != nullptr) {
-            dumped_fo.type = entry[i].object->type;
-            dumped_fo.number = entry[i].object->number;
-            if (dumped_fo.number > 2 && wamr->fd_map_.contains(dumped_fo.number)) {
-                fd_map[dumped_fo.number] = wamr->fd_map_[dumped_fo.number];
-                LOGV(DEBUG) << fmt::format("fd:{} path:{}", dumped_fo.number, fd_map[dumped_fo.number].first);
-            }
-            // open type? read write? or just rw
-            // if (((uint64)entry[i].object->directory.handle) > 10000) {
-            //     auto d = readdir(entry[i].object->directory.handle);
-            //     // got from dir path, is that one on one?
-            //     // dumped_fo.dir=fmt::sprintf("%s/%s",dir_path, d->d_name);
-            //     dumped_fo.dir = d->d_name;
-            //     dumped_fo.offset = entry[i].object->directory.offset;
-            // }
-            LOGV(DEBUG) << "type:" << dumped_fo.type;
-            LOGV(DEBUG) << "number:" << dumped_fo.number;
-        }
-        dumped_fo.rights_base = entry[i].rights_base;
-        dumped_fo.rights_inheriting = entry[i].rights_inheriting;
-        this->curfds.entries.emplace_back(dumped_fo);
-    }
-#endif
-#if 0
-    char path[256] = "/proc/self/fd";
-    char fname[256];
-    DIR *d;
-    int len, path_len, fd, flags;
-
-    path_len = strlen(path);
-    d = opendir(path);
-
-    if (!d) {
-        throw(std::runtime_error("open self fd error"));
-    }
-
-    struct dirent *e;
-    while ((e = readdir(d)) != nullptr) {
-        if (e->d_name[0] == '.')
-            continue; // skip "." and ".."
-
-        if (strlen(path) + 1 + strlen(e->d_name) >= 256) // overflow
-        {
-            closedir(d);
-            throw(std::runtime_error("open self fd overflow"));
-        }
-        path[path_len] = '/';
-        path[path_len + 1] = 0;
-        strcat(path, e->d_name);
-
-        len = readlink(path, fname, sizeof(fname) - 1);
-        if (len > 0) {
-            fname[len] = 0;
-        }
-        fd = atoi(e->d_name);
-        flags = fcntl(fd, F_GETFL);
-        fd_map[fd] = std::make_pair(fname, flags);
-    }
-    closedir(d);
-#endif
-#if 0
-    this->prestats.size = env->prestats->size;
-    this->prestats.used = env->prestats->used;
-    auto removeTrailingSlashes = [](const std::string &input) {
-        size_t lastNotSlash = input.find_last_not_of('/');
-        if (lastNotSlash != std::string::npos) {
-            // lastNotSlash + 1 is the new length of the string
-            return input.substr(0, lastNotSlash + 1);
-        } else {
-            // The string is all slashes
-            return std::string("/");
-        }
-    };
-    for (int i = 0; i < env->prestats->size; i++) {
-        auto dumped_pres = WAMRFDPrestat();
-        auto dir_ = (const char *)((wasi_fd_prestats *)env->prestats)->prestats[i].dir;
-        if (dir_) {
-            dumped_pres.dir = removeTrailingSlashes(dir_);
-            LOGV(DEBUG) << dumped_pres.dir;
-        }
-        this->prestats.prestats.emplace_back(dumped_pres);
-    }
-    auto cur_pool = env->addr_pool;
-    while (cur_pool) {
-        if (cur_pool->addr.ip4 != 0) {
-            auto dumped_addr = WAMRAddrPool();
-            if (cur_pool->type == 0) {
-                dumped_addr.is_4 = true;
-                memcpy(dumped_addr.ip4, &cur_pool->addr.ip4, sizeof(uint32));
-                LOGV(DEBUG) << fmt::format("ip4:{}", cur_pool->addr.ip4);
-            } else {
-                dumped_addr.is_4 = false;
-                memcpy(dumped_addr.ip6, &cur_pool->addr.ip6, sizeof(uint16) * 8);
-            }
-            if (cur_pool->mask == 0) {
-                dumped_addr.mask = UINT8_MAX;
-            }
-            this->addr_pool.emplace_back(dumped_addr);
-        }
-        cur_pool = cur_pool->next;
-    }
-    // TODO: need to set tcp alive
-    this->argv_environ.argv_list =
-        std::vector<std::string>(env->argv_environ->argv_list, env->argv_environ->argv_list + env->argv_environ->argc);
-    this->argv_environ.env_list = std::vector<std::string>(
-        env->argv_environ->environ_list, env->argv_environ->environ_list + env->argv_environ->environ_count);
-#endif
     this->exit_code = env->exit_code;
 }
-void WAMRWASIContext::restore_impl(WASIContext *env) {
+void WAMRWASIContext::git checkout main(WASIContext *env) {
 #if 0
     // Need to open the file and reinitialize the file descripter by map.
     env->curfds->size = this->curfds.size;
@@ -170,6 +51,7 @@ void WAMRWASIContext::restore_impl(WASIContext *env) {
 #endif
     for (auto [fd, res] : this->fd_map) {
         // differ from path from file
-        wamr->invoke_open(fd, res.first, res.second);
+        wamr->invoke_fopen(fd, std::get<0>(res),std::get<1>(res));
+        wamr->invoke_fseek(fd, std::get<2>(res));
     }
 };
\ No newline at end of file
diff --git a/test/read-file.c b/test/read-file.c
index 8c7c8bf..fd966a2 100644
--- a/test/read-file.c
+++ b/test/read-file.c
@@ -1,4 +1,6 @@
+
 // #include <cstdio>
+#include <stdbool.h>
 #include <stdio.h>
 #include <sys/fcntl.h>
 #include <unistd.h>
diff --git a/test/server.c b/test/server.c
index cbd70de..6e1f581 100644
--- a/test/server.c
+++ b/test/server.c
@@ -93,6 +93,9 @@ main(int argc, char *argv[])
 
    printf("[Server] Create socket\n");
    socket_fd = socket(af, SOCK_DGRAM, 0);
+   // socket(domain, type, protocol)
+   // snapshot af, sock_dgram, 0
+   
    if (socket_fd < 0) {
        perror("Create socket failed");
        goto fail;