aboutsummaryrefslogtreecommitdiff
path: root/src/net.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/net.c')
-rw-r--r--src/net.c442
1 files changed, 442 insertions, 0 deletions
diff --git a/src/net.c b/src/net.c
new file mode 100644
index 0000000..2044342
--- /dev/null
+++ b/src/net.c
@@ -0,0 +1,442 @@
+#ifdef _WIN32 //add -lws2_32
+ #include <winsock2.h>
+ //#define socklen_t __socklen_t
+ //#define close closesocket
+ typedef int socklen_t;
+#else
+ #include <sys/socket.h>
+ #include <arpa/inet.h>
+#endif
+
+#include <sys/types.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <pthread.h>
+#include <string.h>
+#include <unistd.h>
+#include "net.h"
+#include "lua.h"
+
+#include "i_str.h"
+
+#define max_con 10
+#define BUFFER_SIZE 2048
+
+static int ports[65535] = { 0 };
+
+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* type, 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"
+ "Content-Type: %s\r\n"
+ "\r\n"
+ , code, code_det, type);
+
+ *_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, "Content-Type");
+ lua_gettable(L, res_idx);
+ char* content_type = (char*)luaL_checkstring(L, -1);
+
+ lua_pushvalue(L, res_idx);
+ lua_pushstring(L, "Code");
+ lua_gettable(L, res_idx);
+ int code = luaL_checkinteger(L, -1);
+ str* resp;
+
+ char code_det[50] = {0};
+ http_code(code, code_det);
+ http_build(&resp, code, code_det,content_type, content);
+ send(client_fd, resp->c, resp->len, 0);
+ str_free(resp);
+ return 0;
+}
+
+void* handle_client(void *_arg){
+ //int client_fd = *((int*)_arg);
+ thread_arg_struct* args = (thread_arg_struct*)_arg;
+ int client_fd = args->fd;
+ printf("%i\n",args->port);
+
+ char* buffer;
+ char dummy[2] = {0, 0};
+ int header_eof;
+ //read full request
+ size_t bytes_received = recv_full_buffer(client_fd, &buffer, &header_eof);
+
+ //printf("%i\n",recv(client_fd, dummy, 1, 0 ));
+ //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){
+ //printf("%s\n",buffer);
+
+ //str* resp;
+ //http_build(&resp, 200, "OK","text/html", "<h1>hello world!</h1>");
+
+ lua_State* L= args->L;
+
+ lua_rawgeti(L, LUA_REGISTRYINDEX, ports[args->port]);
+ int k = stable_key(table, "Path", len);
+ lua_pushstring(L, table[k]->c);
+ lua_gettable(L, -2);
+
+ if(lua_type(L, -1) == LUA_TNIL){
+ str* resp;
+ http_build(&resp, 404, "Not Found","text/html", "<h1>404</h1>");
+ send(client_fd, resp->c, resp->len, 0);
+ str_free(resp);
+ } else {
+ lua_pushstring(L, "fn");
+ lua_gettable(L, -2);
+ int func = lua_gettop(L);
+
+ lua_newtable(L);
+ lua_newtable(L);
+ //printf("%s\n",buffer);
+ 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);
+
+ str_free(table[i]);
+ str_free(table[i+1]);
+ }
+ free(table);
+
+ int req_idx = lua_gettop(L);
+ lua_newtable(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);
+
+ 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, "Content");
+ lua_pushstring(L, "");
+ lua_settable(L, -3);
+ int res_idx = lua_gettop(L);
+
+ lua_pushvalue(L, func);
+ lua_pushvalue(L, -2);
+ lua_pushvalue(L, req_idx);
+
+ lua_call(L, 2, 0);
+
+ }
+ //send(client_fd, resp->c, resp->len, 0);
+
+ //str_free(resp);
+
+ }
+ }
+ closesocket(client_fd);
+ free(args);
+ free(buffer);
+ 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();
+ }
+
+ 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();
+ }
+
+ thread_arg_struct* args = malloc(sizeof * args);
+ args->fd = *client_fd;
+ args->port = port;
+ args->L = L;
+ //send request to handle_client()
+ pthread_t thread_id;
+ pthread_create(&thread_id, NULL, handle_client, (void*)args);
+ pthread_detach(thread_id);
+ }
+
+}
+
+int l_GET(lua_State* L){
+ lua_pushstring(L, "port");
+ lua_gettable(L, 1);
+ int port = luaL_checkinteger(L, -1);
+ 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);
+
+ 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_call(L, 1, 0);
+
+ start_serv(L, port);
+ return 0;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2026-01-13 08:32:46 +0000