From ad461be9bd9d95093305f9cdbc5b09971bfa6869 Mon Sep 17 00:00:00 2001 From: amelia Date: Tue, 30 Jan 2024 17:54:35 +0000 Subject: grrr --- net.c | 559 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 559 insertions(+) create mode 100644 net.c (limited to 'net.c') diff --git a/net.c b/net.c new file mode 100644 index 0000000..786ce4f --- /dev/null +++ b/net.c @@ -0,0 +1,559 @@ +#ifdef _WIN32 //add -lws2_32 + #include + //#define socklen_t __socklen_t + //#define close closesocket + typedef int socklen_t; +#else + #include + #include +#define closesocket close +#endif + +#include +#include +#include +#include +#include +#include +#include "net.h" +#include "lua.h" + +#include "io.h" +#include "table.h" +#include "i_str.h" +#include "parray.h" + +#define max_con 200 +#define BUFFER_SIZE 2048 + +static int ports[65535] = { 0 }; +static parray_t* paths = NULL; + +struct lchar { + char* c; + int len; +}; + +pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER; + +size_t recv_full_buffer(int client_fd, char** _buffer, int* header_eof){ + char* buffer = malloc(BUFFER_SIZE * sizeof * buffer); + memset(buffer, 0, BUFFER_SIZE); + char* header; + size_t len = 0; + *header_eof = -1; + int n; + + for(;;){ + n = recv(client_fd, buffer + len, BUFFER_SIZE, 0); + if(*header_eof == -1 && (header = strstr(buffer, "\r\n\r\n")) != NULL){ + *header_eof = header - buffer; + } + if(n != BUFFER_SIZE) break; + len += BUFFER_SIZE; + buffer = realloc(buffer, len + BUFFER_SIZE); + memset(buffer + len, 0, BUFFER_SIZE); + } + //buffer[len - 1] = 0; + + *_buffer = buffer; + return len + BUFFER_SIZE; +} + +int parse_header(char* buffer, int header_eof, str*** _table, int* _len){ + if(header_eof == -1) return -1; + char add[] = {0,0}; + int lines = 3; + for(int i = 0; i != header_eof; i++) lines += buffer[i] == '\n'; + str** table = malloc(sizeof ** table * lines * 2); + table[0] = str_init("Request");// table[1] = str_init("Post|Get"); + table[2] = str_init("Path");// table[3] = str_init("/"); + table[4] = str_init("Version");// table[5] = str_init("HTTP/1.1"); + str* current = str_init(""); + int ins = 1; + int oi = 0; + for(; oi != header_eof; oi++){ + add[0] = buffer[oi]; + if(buffer[oi] == '\n') break; + if(buffer[oi] == ' '){ + table[ins] = str_init(current->c); + ins += 2; + str_clear(current); + } else str_push(current, add); + } + current->c[current->len - 1] = 0; + table[ins] = str_init(current->c); + str_clear(current); + int tlen = 6; + + int key = 1; + for(int i = oi + 1; i != header_eof; i++){ + if(key && buffer[i]==':' || !key && buffer[i]=='\n') { + if(!key) current->c[current->len - 1] = 0; + table[tlen] = str_init(current->c); + str_clear(current); + tlen++; + i+=key; + key = !key; + continue; + } + add[0] = buffer[i]; + str_push(current, add); + } + table[tlen] = str_init(current->c); + tlen++; + str_free(current); + *_len = tlen / 2; + *_table = table; + return 0; +} + +int stable_key(str** table, char* target, int flen){ + for(int i = 0; i != flen * 2; i+=2){ + if(strcmp(table[i]->c,target) == 0){ + return i + 1; + } + } + return -1; +} + +void http_build(str** _dest, int code, char* code_det, char* header_vs, char* content){ + /**dest = str_init( + "HTTP/1.1 404 Not Found\r\n" + "Content-Type: text/plain\r\n" + "\r\n" + "test" + );*/ + char* dest = malloc(BUFFER_SIZE); + memset(dest, 0, BUFFER_SIZE); + sprintf(dest, + "HTTP/1.1 %i %s\r\n" + "%s" + "\r\n" + , code, code_det, header_vs); + + *_dest = str_init(dest); + str_push(*_dest, content); + free(dest); +} + +typedef struct { + int fd; + int port; + lua_State* L; +} thread_arg_struct; + +void http_code(int code, char* code_det){ + //this was done with a script btw + switch(code){ + case 100: sprintf(code_det,"Continue"); break; + case 101: sprintf(code_det,"Switching Protocols"); break; + case 102: sprintf(code_det,"Processing"); break; + case 103: sprintf(code_det,"Early Hints"); break; + case 200: sprintf(code_det,"OK"); break; + case 201: sprintf(code_det,"Created"); break; + case 202: sprintf(code_det,"Accepted"); break; + case 203: sprintf(code_det,"Non-Authoritative Information"); break; + case 204: sprintf(code_det,"No Content"); break; + case 205: sprintf(code_det,"Reset Content"); break; + case 206: sprintf(code_det,"Partial Content"); break; + case 207: sprintf(code_det,"Multi-Status"); break; + case 208: sprintf(code_det,"Already Reported"); break; + case 226: sprintf(code_det,"IM Used"); break; + case 300: sprintf(code_det,"Multiple Choices"); break; + case 301: sprintf(code_det,"Moved Permanently"); break; + case 302: sprintf(code_det,"Found"); break; + case 303: sprintf(code_det,"See Other"); break; + case 304: sprintf(code_det,"Not Modified"); break; + case 307: sprintf(code_det,"Temporary Redirect"); break; + case 308: sprintf(code_det,"Permanent Redirect"); break; + case 400: sprintf(code_det,"Bad Request"); break; + case 401: sprintf(code_det,"Unauthorized"); break; + case 402: sprintf(code_det,"Payment Required"); break; + case 403: sprintf(code_det,"Forbidden"); break; + case 404: sprintf(code_det,"Not Found"); break; + case 405: sprintf(code_det,"Method Not Allowed"); break; + case 406: sprintf(code_det,"Not Acceptable"); break; + case 407: sprintf(code_det,"Proxy Authentication Required"); break; + case 408: sprintf(code_det,"Request Timeout"); break; + case 409: sprintf(code_det,"Conflict"); break; + case 410: sprintf(code_det,"Gone"); break; + case 411: sprintf(code_det,"Length Required"); break; + case 412: sprintf(code_det,"Precondition Failed"); break; + case 413: sprintf(code_det,"Content Too Large"); break; + case 414: sprintf(code_det,"URI Too Long"); break; + case 415: sprintf(code_det,"Unsupported Media Type"); break; + case 416: sprintf(code_det,"Range Not Satisfiable"); break; + case 417: sprintf(code_det,"Expectation Failed"); break; + case 418: sprintf(code_det,"I'm a teapot"); break; + case 421: sprintf(code_det,"Misdirected Request"); break; + case 422: sprintf(code_det,"Unprocessable Content"); break; + case 423: sprintf(code_det,"Locked"); break; + case 424: sprintf(code_det,"Failed Dependency"); break; + case 425: sprintf(code_det,"Too Early"); break; + case 426: sprintf(code_det,"Upgrade Required"); break; + case 428: sprintf(code_det,"Precondition Required"); break; + case 429: sprintf(code_det,"Too Many Requests"); break; + case 431: sprintf(code_det,"Request Header Fields Too Large"); break; + case 451: sprintf(code_det,"Unavailable For Legal Reasons"); break; + case 500: sprintf(code_det,"Internal Server Error"); break; + case 501: sprintf(code_det,"Not Implemented"); break; + case 502: sprintf(code_det,"Bad Gateway"); break; + case 503: sprintf(code_det,"Service Unavailable"); break; + case 504: sprintf(code_det,"Gateway Timeout"); break; + case 505: sprintf(code_det,"HTTP Version Not Supported"); break; + case 506: sprintf(code_det,"Variant Also Negotiates"); break; + case 507: sprintf(code_det,"Insufficient Storage"); break; + case 508: sprintf(code_det,"Loop Detected"); break; + case 510: sprintf(code_det,"Not Extended"); break; + case 511: sprintf(code_det,"Network Authentication Required"); break; + default: sprintf(code_det,"unknown"); + } +} + +int l_send(lua_State* L){ + int res_idx = 1; + + lua_pushvalue(L, res_idx); + lua_pushstring(L, "client_fd"); + lua_gettable(L, res_idx); + int client_fd = luaL_checkinteger(L, -1); + + /* + lua_pushvalue(L, res_idx); + lua_pushstring(L, "Content"); + lua_gettable(L, res_idx);*/ + char* content = (char*)luaL_checkstring(L, 2); + + lua_pushvalue(L, res_idx); + lua_pushstring(L, "header"); + lua_gettable(L, -2); + int header = lua_gettop(L); + + str* header_vs = str_init(""); + lua_pushnil(L); + for(;lua_next(L, header) != 0;){ + char* key = (char)luaL_tolstring(L, -2, NULL); + if(strcmp(key, "Code") != 0){ + str_push(header_vs, key); + str_push(header_vs, ": "); + str_push(header_vs, (char)luaL_tolstring(L, -2, NULL)); + str_push(header_vs, "\r\n"); + lua_pop(L, 1); + } + lua_pop(L, 2); + } + + lua_pushvalue(L, header); + lua_pushstring(L, "Code"); + lua_gettable(L, header); + int code = luaL_checkinteger(L, -1); + str* resp; + + char code_det[50] = {0}; + http_code(code, code_det); + http_build(&resp, code, code_det, header_vs->c, content); + send(client_fd, resp->c, resp->len, 0); + str_free(resp); + str_free(header_vs); + return 0; +} + +volatile size_t threads = 0; +void* handle_client(void *_arg){ + //pthread_mutex_lock(&mutex); + thread_arg_struct* args = (thread_arg_struct*)_arg; + int client_fd = args->fd; + char* buffer; + char dummy[2] = {0, 0}; + int header_eof; + + //create state for this thread + lua_State* L = luaL_newstate(); + luaL_openlibs(L); + + //read full request + size_t bytes_received = recv_full_buffer(client_fd, &buffer, &header_eof); + + //if the buffer, yknow exists + if(bytes_received > 0){ + str** table; + int len = 0; + //checks for a valid header + if(parse_header(buffer, header_eof, &table, &len) != -1){ + int k = stable_key(table, "Path", len); + + char portc[10] = {0}; + sprintf(portc, "%i", args->port); + + str* aa = str_init(portc); + str_push(aa, table[k]->c); + + void* v = parray_get(paths, aa->c); + + if(v == NULL){ + str* resp; + http_build(&resp, 404, "Not Found","text/html", "

404

"); + send(client_fd, resp->c, resp->len, 0); + str_free(resp); + } else { + struct lchar* awa = (struct lchar*)v; + luaL_loadbuffer(L, awa->c, awa->len, awa->c); + + int func = lua_gettop(L); + + lua_newtable(L); + lua_newtable(L); + for(int i = 0; i != len * 2; i+=2){ + //printf("'%s' :: '%s'\n",table[i]->c, table[i+1]->c); + lua_pushstring(L, table[i]->c); + lua_pushstring(L, table[i+1]->c); + lua_settable(L, -3); + } + + int req_idx = lua_gettop(L); + lua_newtable(L); + int res_idx = lua_gettop(L); + //functions + lua_pushstring(L, "send"); + lua_pushcfunction(L, l_send); + lua_settable(L, -3); + + //values + lua_pushstring(L, "client_fd"); + lua_pushinteger(L, client_fd); + lua_settable(L, -3); + + //header table + lua_newtable(L); + lua_pushstring(L, "Code"); + lua_pushinteger(L, 200); + lua_settable(L, -3); + + lua_pushstring(L, "Content-Type"); + lua_pushstring(L, "text/html"); + lua_settable(L, -3); + + lua_pushstring(L, "header"); + lua_pushvalue(L, -2); + lua_settable(L, res_idx); + + lua_pushvalue(L, func); // push function call + lua_pushvalue(L, res_idx); //push methods related to dealing with the request + lua_pushvalue(L, req_idx); //push info about the request + + //call the function + lua_call(L, 2, 0); + } + + } + + for(int i = 0; i != len; i++){ + str_free(table[i]); + } + free(table); + } + + closesocket(client_fd); + free(args); + free(buffer); + lua_close(L); + + pthread_mutex_lock(&mutex); + threads--; + pthread_mutex_unlock(&mutex); + return NULL; +} + +int start_serv(lua_State* L, int port){ + //need these on windows for sockets (stupid) +#ifdef _WIN32 + WSADATA Data; + WSAStartup(MAKEWORD(2, 2), &Data); +#endif + + int server_fd; + struct sockaddr_in server_addr; + + //open the socket + if((server_fd = socket(AF_INET, SOCK_STREAM, 0)) < 0){ + printf("error opening socket\n"); + abort(); + } + + server_addr.sin_family = AF_INET; + server_addr.sin_addr.s_addr = INADDR_ANY; + server_addr.sin_port = htons(port); + + //bind to port + if(bind(server_fd, (struct sockaddr*)&server_addr, sizeof(server_addr)) < 0){ + printf("failed to bind to port\n"); + abort(); + } + + if(listen(server_fd, max_con) < 0){ + printf("failed to listen\n"); + abort(); + } + /* + lua_rawgeti(L, LUA_REGISTRYINDEX, ports[port]); + lua_pushstring(L, "/"); + lua_gettable(L, -2); + lua_pushstring(L, "fn"); + lua_gettable(L, -2); + int aa = lua_gettop(L);*/ + if (pthread_mutex_init(&mutex, NULL) != 0) + printf("mutex init failed\n"); + + for(;;){ + struct sockaddr_in client_addr; + socklen_t client_addr_len = sizeof(client_addr); + int* client_fd = malloc(sizeof(int)); + + if((*client_fd = accept(server_fd, (struct sockaddr*)&client_addr, &client_addr_len)) < 0){ + printf("failed to accept\n"); + abort(); + } + printf("%i\n",threads); + //open a state to call shit, should be somewhat thread safe + + + thread_arg_struct* args = malloc(sizeof * args); + args->fd = *client_fd; + args->port = port; + + pthread_mutex_lock(&mutex); + threads++; + pthread_mutex_unlock(&mutex); + + //send request to handle_client() + pthread_t thread_id; + pthread_create(&thread_id, NULL, handle_client, (void*)args); + pthread_detach(thread_id); + + } + +} + +#define requiref( L, modname, f, glob ) \ + { luaL_requiref( L, modname, f, glob ); lua_pop( L, 1 ); } + +int l_GET(lua_State* L){ + lua_pushstring(L, "port"); + lua_gettable(L, 1); + int port = luaL_checkinteger(L, -1); + + char portc[10] = {0}; + sprintf(portc, "%i%s", port, lua_tostring(L, 2)); + + + lua_getglobal(L, "string"); + lua_pushstring(L, "dump"); + lua_gettable(L, -2); + lua_pushvalue(L, 3); + lua_call(L, 1, 1); + + size_t len; + char* a = (char*)luaL_tolstring(L, -1, &len); + struct lchar* awa = malloc(len + 1); + awa->c = a; + awa->len = len; + + if(paths == NULL) + paths = parray_init(); + parray_set(paths, portc, (void*)awa); + /* + int tab_idx = ports[port]; + int ot; + if(tab_idx == 0){ + lua_newtable(L); + ports[port] = tab_idx = luaL_ref(L, LUA_REGISTRYINDEX); + lua_rawgeti(L,LUA_REGISTRYINDEX,tab_idx); + + } else { + lua_rawgeti(L,LUA_REGISTRYINDEX,tab_idx); + } + int o = lua_gettop(L); + + lua_newtable(L); + lua_pushstring(L, "fn"); + lua_pushvalue(L, 3); + lua_settable(L, -3); + + lua_pushvalue(L, o); + lua_pushvalue(L, 2); + lua_pushvalue(L, -3); + lua_settable(L, -3); + */ + //printf("%i%s",port, lua_tostring(L, 2)); + + return 1; +} + + +int l_listen(lua_State* L){ + if(lua_gettop(L) != 2) { + printf("not enough args"); + abort(); + } + if(lua_type(L, 1) != LUA_TFUNCTION) { + printf("expected a function at arg 1"); + abort(); + } + int port = luaL_checkinteger(L, 2); + + lua_newtable(L); + lua_pushstring(L, "GET"); + lua_pushcfunction(L, l_GET); + lua_settable(L, -3); + + lua_pushstring(L, "port"); + lua_pushvalue(L, 2); + lua_settable(L, -3); + + lua_pushvalue(L, 1); //the function + lua_pushvalue(L, -2); //the server table + + lua_pcall(L, 1, 0, 0); + + start_serv(L, port); + return 0; +} + +void* hh(void* _L){ + + lua_State* L = (lua_State*)_L; + lua_call(L, 0, 0); + + return NULL; +} + +int l_spawn(lua_State* L){ + lua_getglobal(L, "string"); + lua_pushstring(L, "dump"); + lua_gettable(L, -2); + lua_pushvalue(L, 1); + lua_call(L, 1, 1); + + size_t len; + char* a = (char*)luaL_tolstring(L, -1, &len); + //luaL_loadbuffer(L, a, len, a); + //lua_call(L,0,0); + + lua_State* sL = luaL_newstate(); + luaL_openlibs(sL); + requiref(sL, "_G", luaopen_base, 0); + requiref(sL, "package", luaopen_package, 1); + + lua_pushlstring(sL, a, len); + char* b = (char*)luaL_tolstring(sL, -1, &len); + luaL_loadbuffer(sL, b, len, b); + + //l_pprint(L); + pthread_t thread_id; + pthread_create(&thread_id, NULL, hh, (void*)sL); + pthread_detach(thread_id); + + + return 0; +} -- cgit v1.2.3