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beginning drafting of tcp server

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This commit is contained in:
Seth Hamilton
2025-08-18 20:34:25 -05:00
parent 8b5fac0f3f
commit a9efa2dd52
9 changed files with 192 additions and 25 deletions
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3
.gitmodules vendored
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@@ -4,3 +4,6 @@
[submodule "ext/glm"] [submodule "ext/glm"]
path = ext/glm path = ext/glm
url = https://github.com/g-truc/glm.git url = https://github.com/g-truc/glm.git
[submodule "ext/pthreads4w-code"]
path = ext/pthreads4w-code
url = https://git.code.sf.net/p/pthreads4w/code

7
LivePlotter.vcxproj
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@@ -71,8 +71,8 @@
</ImportGroup> </ImportGroup>
<PropertyGroup Label="UserMacros" /> <PropertyGroup Label="UserMacros" />
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'"> <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
<LibraryPath>$(SolutionDir)ext\glfw\build\src\Debug;$(VC_LibraryPath_x64);$(WindowsSDK_LibraryPath_x64)</LibraryPath> <LibraryPath>$(SolutionDir)ext\pthreads4w-code\build\Debug;$(SolutionDir)ext\glfw\build\src\Debug;$(VC_LibraryPath_x64);$(WindowsSDK_LibraryPath_x64)</LibraryPath>
<IncludePath>$(SolutionDir)ext\glm;$(SolutionDir)ext\glfw\include;$(SolutionDir)inc;$(IncludePath)</IncludePath> <IncludePath>$(SolutionDir)ext\pthreads4w-code;$(SolutionDir)ext\glm;$(SolutionDir)ext\glfw\include;$(SolutionDir)inc;$(IncludePath)</IncludePath>
<OutDir>$(SolutionDir)bin\$(Platform)\$(Configuration)\</OutDir> <OutDir>$(SolutionDir)bin\$(Platform)\$(Configuration)\</OutDir>
<IntDir>$(SolutionDir)obj\$(Platform)\$(Configuration)\</IntDir> <IntDir>$(SolutionDir)obj\$(Platform)\$(Configuration)\</IntDir>
<SourcePath>$(SolutionDir)src;$(SourcePath)</SourcePath> <SourcePath>$(SolutionDir)src;$(SourcePath)</SourcePath>
@@ -116,7 +116,7 @@
<Link> <Link>
<SubSystem>Console</SubSystem> <SubSystem>Console</SubSystem>
<GenerateDebugInformation>true</GenerateDebugInformation> <GenerateDebugInformation>true</GenerateDebugInformation>
<AdditionalDependencies>glfw3.lib;opengl32.lib;%(AdditionalDependencies)</AdditionalDependencies> <AdditionalDependencies>pthreadVC3d.lib;glfw3.lib;opengl32.lib;%(AdditionalDependencies)</AdditionalDependencies>
</Link> </Link>
</ItemDefinitionGroup> </ItemDefinitionGroup>
<ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'"> <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
@@ -140,6 +140,7 @@
<ClCompile Include="src\glad.c" /> <ClCompile Include="src\glad.c" />
<ClCompile Include="src\main.cpp" /> <ClCompile Include="src\main.cpp" />
<ClCompile Include="src\shaders.cpp" /> <ClCompile Include="src\shaders.cpp" />
<ClCompile Include="src\tcp_server.cpp" />
<ClCompile Include="src\util.cpp" /> <ClCompile Include="src\util.cpp" />
</ItemGroup> </ItemGroup>
<Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" /> <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />

36
compile_commands.json
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@@ -1,31 +1,37 @@
[ [
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"file": "C:/Users/seth/Documents/repos/LivePlotter/src/main.cpp" "file": "C:/Users/sethh/Documents/repos/LivePlotter/src/shaders.cpp"
} }
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"file": "C:/Users/seth/Documents/repos/LivePlotter/src/shaders.cpp" "file": "C:/Users/sethh/Documents/repos/LivePlotter/src/main.cpp"
} }
, ,
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"command": "\"C:/Users/seth/AppData/Roaming/ClangPowerTools/LLVM_Lite/Bin/clang++.exe\" -x c \"C:/Users/seth/Documents/repos/LivePlotter/src/glad.c\" -Wall -fms-compatibility-version=19.10 -Wmicrosoft -Wno-invalid-token-paste -Wno-unknown-pragmas -Wno-unused-value -fsyntax-only \"-DUNICODE\" \"-D_UNICODE\" \"-D_MT\" \"-D_DLL\" \"-D_DEBUG\" \"-D_CONSOLE\" \"-D_DEBUG_FUNCTIONAL_MACHINERY\" -isystem\"C:/Program Files (x86)/Microsoft Visual Studio/2022/BuildTools/VC/include\" -isystem\"C:/Program Files (x86)/Microsoft Visual Studio/2022/BuildTools/VC/atlmfc/include\" -isystem\"C:/Program Files (x86)/Microsoft Visual Studio/2022/BuildTools/VC/Auxiliary/VS/include\" -isystem\"C:/Program Files (x86)/Windows Kits/10/Include/10.0.26100.0/ucrt\" -isystem\"C:/Program Files (x86)/Windows Kits/10/Include/10.0.26100.0/um\" -isystem\"C:/Program Files (x86)/Windows Kits/10/Include/10.0.26100.0/shared\" -isystem\"C:/Program Files (x86)/Windows Kits/10/Include/10.0.26100.0/winrt\" -isystem\"C:/Program Files (x86)/Windows Kits/10/Include/10.0.26100.0/cppwinrt\" -isystem\"C:/Users/seth/Documents/repos/LivePlotter/ext/glm\" -isystem\"C:/Users/seth/Documents/repos/LivePlotter/ext/glfw/include\" -isystem\"C:/Users/seth/Documents/repos/LivePlotter/inc\"", "command": "\"C:/Users/sethh/AppData/Roaming/ClangPowerTools/LLVM_Lite/Bin/clang++.exe\" -x c++ \"C:/Users/sethh/Documents/repos/LivePlotter/src/util.cpp\" -std=c++20 -Wall -fms-compatibility-version=19.10 -Wmicrosoft -Wno-invalid-token-paste -Wno-unknown-pragmas -Wno-unused-value -fsyntax-only \"-DUNICODE\" \"-D_UNICODE\" \"-D_MT\" \"-D_DLL\" \"-D_DEBUG\" \"-D_CONSOLE\" \"-D_DEBUG_FUNCTIONAL_MACHINERY\" -isystem\"C:/Program Files/Microsoft Visual Studio/2022/Community/VC/include\" -isystem\"C:/Program Files/Microsoft Visual Studio/2022/Community/VC/atlmfc/include\" -isystem\"C:/Program Files/Microsoft Visual Studio/2022/Community/VC/Auxiliary/VS/include\" -isystem\"C:/Program Files (x86)/Windows Kits/10/Include/10.0.22621.0/ucrt\" -isystem\"C:/Program Files (x86)/Windows Kits/10/Include/10.0.22621.0/um\" -isystem\"C:/Program Files (x86)/Windows Kits/10/Include/10.0.22621.0/shared\" -isystem\"C:/Program Files (x86)/Windows Kits/10/Include/10.0.22621.0/winrt\" -isystem\"C:/Program Files (x86)/Windows Kits/10/Include/10.0.22621.0/cppwinrt\" -isystem\"C:/Users/sethh/Documents/repos/LivePlotter/ext/pthreads4w-code\" -isystem\"C:/Users/sethh/Documents/repos/LivePlotter/ext/glm\" -isystem\"C:/Users/sethh/Documents/repos/LivePlotter/ext/glfw/include\" -isystem\"C:/Users/sethh/Documents/repos/LivePlotter/inc\"",
"file": "C:/Users/seth/Documents/repos/LivePlotter/src/glad.c" "file": "C:/Users/sethh/Documents/repos/LivePlotter/src/util.cpp"
} }
, ,
{ {
"directory": "C:/Users/seth/Documents/repos/LivePlotter/", "directory": "C:/Users/sethh/Documents/repos/LivePlotter/",
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"file": "C:/Users/seth/Documents/repos/LivePlotter/src/util.cpp" "file": "C:/Users/sethh/Documents/repos/LivePlotter/src/tcp_server.cpp"
} }
, ,
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"command": "\"C:/Users/seth/AppData/Roaming/ClangPowerTools/LLVM_Lite/Bin/clang++.exe\" -x c++ \"C:/Users/seth/Documents/repos/LivePlotter/src/body.cpp\" -std=c++20 -Wall -fms-compatibility-version=19.10 -Wmicrosoft -Wno-invalid-token-paste -Wno-unknown-pragmas -Wno-unused-value -fsyntax-only \"-DUNICODE\" \"-D_UNICODE\" \"-D_MT\" \"-D_DLL\" \"-D_DEBUG\" \"-D_CONSOLE\" \"-D_DEBUG_FUNCTIONAL_MACHINERY\" -isystem\"C:/Program Files (x86)/Microsoft Visual Studio/2022/BuildTools/VC/include\" -isystem\"C:/Program Files (x86)/Microsoft Visual Studio/2022/BuildTools/VC/atlmfc/include\" -isystem\"C:/Program Files (x86)/Microsoft Visual Studio/2022/BuildTools/VC/Auxiliary/VS/include\" -isystem\"C:/Program Files (x86)/Windows Kits/10/Include/10.0.26100.0/ucrt\" -isystem\"C:/Program Files (x86)/Windows Kits/10/Include/10.0.26100.0/um\" -isystem\"C:/Program Files (x86)/Windows Kits/10/Include/10.0.26100.0/shared\" -isystem\"C:/Program Files (x86)/Windows Kits/10/Include/10.0.26100.0/winrt\" -isystem\"C:/Program Files (x86)/Windows Kits/10/Include/10.0.26100.0/cppwinrt\" -isystem\"C:/Users/seth/Documents/repos/LivePlotter/ext/glm\" -isystem\"C:/Users/seth/Documents/repos/LivePlotter/ext/glfw/include\" -isystem\"C:/Users/seth/Documents/repos/LivePlotter/inc\"", "command": "\"C:/Users/sethh/AppData/Roaming/ClangPowerTools/LLVM_Lite/Bin/clang++.exe\" -x c \"C:/Users/sethh/Documents/repos/LivePlotter/src/glad.c\" -Wall -fms-compatibility-version=19.10 -Wmicrosoft -Wno-invalid-token-paste -Wno-unknown-pragmas -Wno-unused-value -fsyntax-only \"-DUNICODE\" \"-D_UNICODE\" \"-D_MT\" \"-D_DLL\" \"-D_DEBUG\" \"-D_CONSOLE\" \"-D_DEBUG_FUNCTIONAL_MACHINERY\" -isystem\"C:/Program Files/Microsoft Visual Studio/2022/Community/VC/include\" -isystem\"C:/Program Files/Microsoft Visual Studio/2022/Community/VC/atlmfc/include\" -isystem\"C:/Program Files/Microsoft Visual Studio/2022/Community/VC/Auxiliary/VS/include\" -isystem\"C:/Program Files (x86)/Windows Kits/10/Include/10.0.22621.0/ucrt\" -isystem\"C:/Program Files (x86)/Windows Kits/10/Include/10.0.22621.0/um\" -isystem\"C:/Program Files (x86)/Windows Kits/10/Include/10.0.22621.0/shared\" -isystem\"C:/Program Files (x86)/Windows Kits/10/Include/10.0.22621.0/winrt\" -isystem\"C:/Program Files (x86)/Windows Kits/10/Include/10.0.22621.0/cppwinrt\" -isystem\"C:/Users/sethh/Documents/repos/LivePlotter/ext/pthreads4w-code\" -isystem\"C:/Users/sethh/Documents/repos/LivePlotter/ext/glm\" -isystem\"C:/Users/sethh/Documents/repos/LivePlotter/ext/glfw/include\" -isystem\"C:/Users/sethh/Documents/repos/LivePlotter/inc\"",
"file": "C:/Users/seth/Documents/repos/LivePlotter/src/body.cpp" "file": "C:/Users/sethh/Documents/repos/LivePlotter/src/glad.c"
}
,
{
"directory": "C:/Users/sethh/Documents/repos/LivePlotter/",
"command": "\"C:/Users/sethh/AppData/Roaming/ClangPowerTools/LLVM_Lite/Bin/clang++.exe\" -x c++ \"C:/Users/sethh/Documents/repos/LivePlotter/src/body.cpp\" -std=c++20 -Wall -fms-compatibility-version=19.10 -Wmicrosoft -Wno-invalid-token-paste -Wno-unknown-pragmas -Wno-unused-value -fsyntax-only \"-DUNICODE\" \"-D_UNICODE\" \"-D_MT\" \"-D_DLL\" \"-D_DEBUG\" \"-D_CONSOLE\" \"-D_DEBUG_FUNCTIONAL_MACHINERY\" -isystem\"C:/Program Files/Microsoft Visual Studio/2022/Community/VC/include\" -isystem\"C:/Program Files/Microsoft Visual Studio/2022/Community/VC/atlmfc/include\" -isystem\"C:/Program Files/Microsoft Visual Studio/2022/Community/VC/Auxiliary/VS/include\" -isystem\"C:/Program Files (x86)/Windows Kits/10/Include/10.0.22621.0/ucrt\" -isystem\"C:/Program Files (x86)/Windows Kits/10/Include/10.0.22621.0/um\" -isystem\"C:/Program Files (x86)/Windows Kits/10/Include/10.0.22621.0/shared\" -isystem\"C:/Program Files (x86)/Windows Kits/10/Include/10.0.22621.0/winrt\" -isystem\"C:/Program Files (x86)/Windows Kits/10/Include/10.0.22621.0/cppwinrt\" -isystem\"C:/Users/sethh/Documents/repos/LivePlotter/ext/pthreads4w-code\" -isystem\"C:/Users/sethh/Documents/repos/LivePlotter/ext/glm\" -isystem\"C:/Users/sethh/Documents/repos/LivePlotter/ext/glfw/include\" -isystem\"C:/Users/sethh/Documents/repos/LivePlotter/inc\"",
"file": "C:/Users/sethh/Documents/repos/LivePlotter/src/body.cpp"
} }
] ]

1
ext/pthreads4w-code Submodule

Submodule ext/pthreads4w-code added at 8e467a62a1

25
inc/tcp_server.hpp Normal file
View File

@@ -0,0 +1,25 @@
#pragma once
#include <WinSock2.h>
#include <pthread.h>
#include "util.hpp"
typedef void (*data_received_cb_t)(SOCKET client, array<char> data);
struct tcpserver {
SOCKET sock;
array<SOCKET> client_socks;
int max_connections;
addrinfo *addr;
array<data_received_cb_t> cbs;
pthread_mutex_t lock;
pthread_cond_t connection_ended;
pthread_cond_t stop_requested;
};
bool create_server(tcpserver *server_out, const char* hostname, int port);
void start_server(tcpserver &s);
void stop_server(tcpserver &s);
void send_data(tcpserver &s, SOCKET client, array<char> data);
void register_recv_cb(tcpserver &s, data_received_cb_t cb);

9
inc/util.hpp
View File

@@ -1,13 +1,18 @@
#pragma once #pragma once
#include <cstdlib>
#include <stdio.h> #include <stdio.h>
typedef unsigned int uint;
template<class T> struct array { template<class T> struct array {
T* data; T* data;
size_t len; size_t len;
size_t cap;
inline T& operator[](int i) { return data[i]; } inline T& operator[](int i) { return data[i]; }
}; };
typedef unsigned int uint; template<class T> void append(array<T>& a, T el);
template<class T> T pop(array<T>& a);
template<class T> void resize(array<T>& a, size_t new_size);
bool read_file(array<char>* out, const char* filepath); bool read_file(array<char>* out, const char* filepath);

2
src/main.cpp
View File

@@ -80,7 +80,7 @@ void scroll_callback(GLFWwindow* window, double xoffset, double yoffset)
glm::vec4 k = camera_t[2]; glm::vec4 k = camera_t[2];
float d = yoffset; float d = yoffset;
camera_loc += k * (d/10 * std::max(glm::length(camera_loc), 1.0f)); camera_loc += k * (d/10 * glm::max(glm::length(camera_loc), 1.0f));
camera_t = glm::lookAt(camera_loc, focal_point, up); camera_t = glm::lookAt(camera_loc, focal_point, up);
} }

102
src/tcp_server.cpp Normal file
View File

@@ -0,0 +1,102 @@
#include <WS2tcpip.h>
#include <cstring>
#pragma comment(lib, "pthreadVC3d.lib")
// I hate windows. I hate windows. I hate windows.
#include <WinSock2.h>
#include <ws2tcpip.h>
#include <stdlib.h>
#include <pthread.h>
#include "tcp_server.hpp"
static WSADATA wsadata;
static bool winsock_initialized = false; // First tcp server created will initialize this
static int init_result;
void _server_loop(void* args);
void _conn_loop(void* args);
void _start_conn_loop(SOCKET client_s);
bool create_server(tcpserver* server_out, const char* hostname, int port, int max_connections = 1) {
if (!winsock_initialized && (init_result = WSAStartup(MAKEWORD(2, 2), &wsadata)) != 0) {
printf("WSAStartup failed: %d\n", init_result);
winsock_initialized = true;
return false;
}
// ********** Addr Info Creation **********
addrinfo *result, *ptr, hints;
char port_str[16];
_itoa_s(port, port_str, 10);
// TODO: Ensure hostname is null-terminated
int status = getaddrinfo(hostname, port_str, &hints, result);
if (status != 0) {
printf("Error at getaddrinfo(): %d\n", status);
goto fail_cleanup;
}
// *********** Socket Creation ************
SOCKET sock = socket(result->ai_family, result->ai_socktype, result->ai_protocol);
if (sock == INVALID_SOCKET) {
printf("Error at socket(): %d\n", WSAGetLastError());
freeaddrinfo(result);
goto fail_cleanup;
}
// *********** Socket Binding ************
status = bind(sock, result->ai_addr, (int)result->ai_addrlen);
if (status == SOCKET_ERROR) {
printf("Error at bind(): %d\n", WSAGetLastError());
freeaddrinfo(result);
goto fail_cleanup;
}
return true;
fail_cleanup:
WSACleanup();
winsock_initialized = false;
return false;
}
void start_server(tcpserver& s) { }
void stop_server(tcpserver& s) { }
void send_data(tcpserver& s, SOCKET client, array<char> data) { }
void register_cb(tcpserver& s, data_received_cb_t cb) { append(s.cbs, cb); }
void _server_loop(void* args) {
tcpserver* s = static_cast<tcpserver*>(args);
int num_connections = 0;
int slots[s->max_connections];
array<int> open_slots
= { .data = slots, .len = (size_t)s->max_connections, .cap = (size_t)s->max_connections };
for (int i = 0; i < open_slots.len; i++) {
open_slots[i] = open_slots.len - (i + 1);
}
SOCKET clients[s->max_connections];
memset(clients, INVALID_SOCKET, sizeof(SOCKET));
while (true) {
while (num_connections < s->max_connections) {
int slot = pop(open_slots);
clients[slot] = accept(s->sock, NULL, NULL);
// TODO: More robust handling of bad client sockets
if (clients[slot] == INVALID_SOCKET) {
printf("Error at accept(): %d\n", WSAGetLastError());
stop_server(*s);
return;
}
_start_conn_loop(clients[slot]);
}
}
}
void _start_conn_loop(SOCKET client_s) {
}
void _conn_loop(void* args) { }

26
src/util.cpp
View File

@@ -1,9 +1,33 @@
#include <cstdio> #include <cstdio>
#include <assert.h> #include <assert.h>
#include <cstring>
#include <stdlib.h> #include <stdlib.h>
#include "util.hpp" #include "util.hpp"
template<class T> void append(array<T>& a, T el) {
if (a.len == a.cap) {
resize(a, a.cap*2);
}
a[a.len] = el;
a.len++;
}
template<class T> T pop(array<T>& a) {
assert(a.len >= 1);
a.len--;
return a.data[a.len+1];
}
template<class T> void resize(array<T> &a, size_t new_cap) {
T* new_data = (T*)malloc(new_cap);
memcpy(new_data, a.data, min(a.len, new_cap));
free(a.data);
a.len = min(a.len, new_cap);
a.cap = new_cap;
}
bool read_file(array<char>* out, const char* filepath) { bool read_file(array<char>* out, const char* filepath) {
FILE* fp = NULL; FILE* fp = NULL;
if (fopen_s(&fp, filepath, "rb") != 0) { if (fopen_s(&fp, filepath, "rb") != 0) {
@@ -15,7 +39,7 @@ bool read_file(array<char>* out, const char* filepath) {
size_t sz = ftell(fp); size_t sz = ftell(fp);
fseek(fp, 0, SEEK_SET); fseek(fp, 0, SEEK_SET);
char *data = (char*)malloc(sizeof(char)*sz); char* data = (char*)malloc(sizeof(char) * sz);
fread(data, sizeof(char), sz, fp); fread(data, sizeof(char), sz, fp);
fclose(fp); fclose(fp);
out->data = data; out->data = data;