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/* $Id: server.c 216 2024-10-02 19:31:23Z nishi $ */

#define SOURCE

#include "../config.h"

#include "tw_server.h"

#ifndef NO_SSL
#include "tw_ssl.h"
#endif

#include "tw_config.h"
#include "tw_http.h"
#include "tw_module.h"
#include "tw_version.h"

#if !defined(_MSC_VER) && !defined(__BORLANDC__)
#include <unistd.h>
#endif
#include <string.h>
#include <stdbool.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <time.h>

#include <cm_string.h>
#include <cm_log.h>
#include <cm_dir.h>

#if defined(__MINGW32__) || defined(_MSC_VER) || defined(__BORLANDC__)
#ifndef NO_GETADDRINFO
#include <ws2tcpip.h>
#include <wspiapi.h>
#endif
#include <winsock2.h>
#include <process.h>
#include <windows.h>

#include "strptime.h"
typedef int socklen_t;
#else
#ifdef USE_POLL
#ifdef __PPU__
#include <net/poll.h>
#else
#include <poll.h>
#endif
#else
#include <sys/select.h>
#endif
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#ifndef __PPU__
#include <netinet/tcp.h>
#endif
#ifndef NO_GETADDRINFO
#include <netdb.h>
#endif
#endif

#if defined(_PSP) || defined(__ps2sdk__)
#include "strptime.h"
#endif

#ifdef __HAIKU__
#include <OS.h>
#endif

#ifndef S_ISDIR
#define S_ISDIR(x) ((x) & _S_IFDIR)
#endif

extern struct tw_config config;
extern char tw_server[];

int sockcount = 0;

SOCKADDR addresses[MAX_PORTS];
int sockets[MAX_PORTS];

#if defined(__MINGW32__) || defined(_MSC_VER) || defined(__BORLANDC__)
const char* reserved_names[] = {"CON", "PRN", "AUX", "NUL", "COM1", "COM2", "COM3", "COM4", "COM5", "COM6", "COM7", "COM8", "COM9", "LPT1", "LPT2", "LPT3", "LPT4", ONT COLOR="#BC8F8F">"LPT5", "LPT6", "LPT7", "LPT8", "LPT9"};
#endif

/* https://qiita.com/gyu-don/items/5a640c6d2252a860c8cd */
int tw_wildcard_match(const char* wildcard, const char* target) {
        const char *pw = wildcard, *pt = target;

        while(1) {
                if(*pt == 0) {
                        while(*pw == '*') pw++;
                        return *pw == 0;
                } else if(*pw == 0) {
                        return 0;
                } else if(*pw == '*') {
                        return *(pw + 1) == 0 || tw_wildcard_match(pw, pt + 1) || tw_wildcard_match(pw + 1, pt);
                } else if(*pw == '?' || (*pw == *pt)) {
                        pw++;
                        pt++;
                        continue;
                } else {
                        return 0;
                }
        }
}

void close_socket(int sock) {
#if defined(__MINGW32__) || defined(_MSC_VER) || defined(__BORLANDC__)
        closesocket(sock);
#else
        close(sock);
#endif
}

int tw_server_init(void) {
        int i;
#if defined(__MINGW32__) || defined(_MSC_VER) || defined(__BORLANDC__)
        WSADATA wsa;
        WSAStartup(MAKEWORD(2, 0), &wsa);
#endif
        for(i = 0; config.ports[i] != -1; i++)
                ;
        sockcount = i;
        for(i = 0; config.ports[i] != -1; i++) {
                int yes = 1;
                int no = 0;
#ifdef NO_IPV6
                int sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
#else
                int sock = socket(AF_INET6, SOCK_STREAM, IPPROTO_TCP);
#endif
#if defined(__MINGW32__) || defined(_MSC_VER) || defined(__BORLANDC__)
                if(sock == INVALID_SOCKET)
#else
                if(sock < 0)
#endif
                {
                        cm_log("Server", "Socket creation failure");
                        return 1;
                }
                if(setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (void*)&yes, sizeof(yes)) < 0) {
                        close_socket(sock);
                        cm_log("Server", "setsockopt failure (reuseaddr)");
                        return 1;
                }
#ifndef __PPU__
                if(setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, (void*)&yes, sizeof(yes)) < 0) {
                        close_socket(sock);
                        cm_log("Server", "setsockopt failure (nodelay)");
                        return 1;
                }
#endif
#ifndef NO_IPV6
                if(setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY, (void*)&no, sizeof(no)) < 0) {
                        close_socket(sock);
                        cm_log("Server", "setsockopt failure (IPv6)");
                        return 1;
                }
#endif
                memset(&addresses[i], 0, sizeof(addresses[i]));
#ifdef NO_IPV6
                addresses[i].sin_family = AF_INET;
                addresses[i].sin_addr.s_addr = INADDR_ANY;
                addresses[i].sin_port = htons(config.ports[i] & 0xffff);
#else
                addresses[i].sin6_family = AF_INET6;
                addresses[i].sin6_addr = in6addr_any;
                addresses[i].sin6_port = htons(config.ports[i] & 0xffff);
#endif
                if(bind(sock, (struct sockaddr*)&addresses[i], sizeof(addresses[i])) < 0) {
                        close_socket(sock);
                        cm_log("Server", "Bind failure");
                        return 1;
                }
                if(listen(sock, 128) < 0) {
                        close_socket(sock);
                        cm_log("Server", "Listen failure");
                        return 1;
                }
                sockets[i] = sock;
        }
        return 0;
}

size_t tw_read(SSL* ssl, int s, void* data, size_t len) {
#ifndef NO_SSL
        if(ssl == NULL) {
                return recv(s, data, len, 0);
        } else {
                return SSL_read(ssl, data, len);
        }
#else
        return recv(s, data, len, 0);
#endif
}

size_t tw_write(SSL* ssl, int s, void* data, size_t len) {
#ifndef NO_SSL
        if(ssl == NULL) {
                return send(s, data, len, 0);
        } else {
                return SSL_write(ssl, data, len);
        }
#else
        return send(s, data, len, 0);
#endif
}

#define ERROR_HTML \
        "<!DOCTYPE HTML PUBLIC \"-//IETF//DTD HTML 2.0//EN\">\n" \
        "<html>\n" \
        "       <head>\n" \
        "               <title>%s</title>\n" \
        "       </head>\n" \
        "       <body>\n" \
        "               <h1>%s</h1>\n" \
        "               <hr>\n" \
        "               ", \
            address, \
            "\n" \
            "   </body>\n" \
            "</html>\n"

void _tw_process_page(SSL* ssl, int sock, const char* status, const char* type, FILE* f, const unsigned char* doc, size_t size, char** headers, time_t mtime, time_t cmtime) {
        char construct[512];
        size_t incr;
        if(mtime != 0 && cmtime != 0 && mtime <= cmtime) {
                status = "304 Not Modified";
                type = NULL;
                size = 0;
                headers = NULL;
                f = NULL;
                doc = NULL;
        }
#if defined(_MSC_VER) || defined(__BORLANDC__)
        sprintf(construct, "%lu", (unsigned long)size);
#else
        sprintf(construct, "%llu", (unsigned long long)size);
#endif
        tw_write(ssl, sock, "HTTP/1.1 ", 9);
        tw_write(ssl, sock, (char*)status, strlen(status));
        tw_write(ssl, sock, "\r\n", 2);
        if(type != NULL) {
                tw_write(ssl, sock, "Content-Type: ", 7 + 5 + 2);
                tw_write(ssl, sock, (char*)type, strlen(type));
                tw_write(ssl, sock, "\r\n", 2);
        }
        tw_write(ssl, sock, "Server: ", 6 + 2);
        tw_write(ssl, sock, tw_server, strlen(tw_server));
        tw_write(ssl, sock, "\r\n", 2);
        if(size != 0) {
                tw_write(ssl, sock, "Content-Length: ", 7 + 7 + 2);
                tw_write(ssl, sock, construct, strlen(construct));
                tw_write(ssl, sock, "\r\n", 2);
                if(mtime != 0) {
                        struct tm* tm = gmtime(&mtime);
                        char date[513];
                        strftime(date, 512, "%a, %d %b %Y %H:%M:%S GMT", tm);
                        tw_write(ssl, sock, "Last-Modified: ", 5 + 8 + 2);
                        tw_write(ssl, sock, date, strlen(date));
                        tw_write(ssl, sock, "\r\n", 2);
                }
        }
        if(headers != NULL) {
                int i;
                for(i = 0; headers[i] != NULL; i += 2) {
                        tw_write(ssl, sock, headers[i], strlen(headers[i]));
                        tw_write(ssl, sock, ": ", 2);
                        tw_write(ssl, sock, headers[i + 1], strlen(headers[i + 1]));
                        tw_write(ssl, sock, "\r\n", 2);
                }
        }
        tw_write(ssl, sock, "\r\n", 2);
        if(doc == NULL && f == NULL) return;
        incr = 0;
        while(1) {
                if(f != NULL) {
                        char buffer[128];
                        fread(buffer, size < 128 ? size : 128, 1, f);
                        tw_write(ssl, sock, buffer, size < 128 ? size : 128);
                } else {
                        tw_write(ssl, sock, (unsigned char*)doc + incr, size < 128 ? size : 128);
                }
                incr += 128;
                if(size <= 128) break;
                size -= 128;
        }
}

void tw_process_page(SSL* ssl, int sock, const char* status, const char* type, FILE* f, const unsigned char* doc, size_t size, time_t mtime, time_t cmtime) { _tw_process_page(ssl, sock, status, type, f, doc, size, NULL, mtime, cmtime); }

const char* tw_http_status(int code) {
        if(code == 200) {
                return "200 OK";
        } else if(code == 301) {
                return "301 Moved Permanently";
        } else if(code == 308) {
                return "308 Permanent Redirect";
        } else if(code == 400) {
                return "400 Bad Request";
        } else if(code == 401) {
                return "401 Unauthorized";
        } else if(code == 403) {
                return "403 Forbidden";
        } else if(code == 404) {
                return "404 Not Found";
        } else if(code == 500) {
                return "500 Internal Server Error";
        } else {
                return "400 Bad Request";
        }
}

char* tw_http_default_error(int code, char* name, int port, struct tw_config_entry* vhost) {
        char address[1024];
        char* st;
        char* st2;
        char* buffer;
        char* str;
        int i;

        if((vhost->hideport == -1 ? config.root.hideport : vhost->hideport) == 1) {
                sprintf(address, "<address>%s Server at %s</address>", tw_server, name, port);
        } else {
                sprintf(address, "<address>%s Server at %s Port %d</address>", tw_server, name, port);
        }

        st = cm_strdup(tw_http_status(code));
        for(i = 0; st[i] != 0; i++) {
                if(st[i] == ' ') {
                        st2 = cm_strdup(st + i + 1);
                        break;
                }
        }
        buffer = malloc(4096);
        str = cm_strcat3(ERROR_HTML);
        sprintf(buffer, str, st, st2);
        free(str);
        free(st);
        return buffer;
}

void tw_http_error(SSL* ssl, int sock, int error, char* name, int port, struct tw_config_entry* vhost) {
        char* str = tw_http_default_error(error, name, port, vhost);
        tw_process_page(ssl, sock, tw_http_status(error), "text/html", NULL, str, strlen(str), 0, 0);
        free(str);
}

void addstring(char** str, const char* add, ...) {
        int i;
        char cbuf[2];
        va_list va;
        cbuf[1] = 0;
        va_start(va, add);
        for(i = 0; add[i] != 0; i++) {
                cbuf[0] = add[i];
                if(add[i] == '%') {
                        i++;
                        if(add[i] == 's') {
                                char* tmp = *str;
                                *str = cm_strcat(tmp, va_arg(va, const char*));
                                free(tmp);
                        } else if(add[i] == 'h') {
                                char* h = cm_html_escape(va_arg(va, const char*));
                                char* tmp = *str;
                                *str = cm_strcat(tmp, h);
                                free(tmp);
                                free(h);
                        } else if(add[i] == 'l') {
                                char* h = cm_url_escape(va_arg(va, const char*));
                                char* tmp = *str;
                                *str = cm_strcat(tmp, h);
                                free(tmp);
                                free(h);
                        } else if(add[i] == 'd') {
                                int n = va_arg(va, int);
                                char* h = malloc(512);
                                char* tmp = *str;
                                sprintf(h, "%d", n);
                                *str = cm_strcat(tmp, h);
                                free(tmp);
                                free(h);
                        } else if(add[i] == '%') {
                                char* tmp = *str;
                                *str = cm_strcat(tmp, "%");
                                free(tmp);
                        }
                } else {
                        char* tmp = *str;
                        *str = cm_strcat(tmp, cbuf);
                        free(tmp);
                }
        }
        va_end(va);
}

char* tw_get_mime(const char* ext, struct tw_config_entry* vhost_entry) {
        char* mime = "application/octet-stream";
        bool set = false;
        int i;
        if(ext == NULL) return mime;
        for(i = 0; i < vhost_entry->mime_count; i++) {
                if(strcmp(vhost_entry->mimes[i].ext, "all") == 0 || (ext != NULL && tw_wildcard_match(vhost_entry->mimes[i].ext, ext))) {
                        mime = vhost_entry->mimes[i].mime;
                        set = true;
                }
        }
        if(!set) {
                for(i = 0; i < config.root.mime_count; i++) {
                        if(strcmp(config.root.mimes[i].ext, "all") == 0 || (ext != NULL && tw_wildcard_match(config.root.mimes[i].ext, ext))) {
                                mime = config.root.mimes[i].mime;
                        }
                }
        }
        return mime;
}

char* tw_get_icon(const char* mime, struct tw_config_entry* vhost_entry) {
        char* icon = "";
        bool set = false;
        int i;
        if(mime == NULL) return "";
        for(i = 0; i < vhost_entry->icon_count; i++) {
                if(strcmp(vhost_entry->icons[i].mime, "all") == 0 || (mime != NULL && tw_wildcard_match(vhost_entry->icons[i].mime, mime))) {
                        icon = vhost_entry->icons[i].icon;
                        set = true;
                }
        }
        if(!set) {
                for(i = 0; i < config.root.icon_count; i++) {
                        if(strcmp(config.root.icons[i].mime, "all") == 0 || (mime != NULL && tw_wildcard_match(config.root.icons[i].mime, mime))) {
                                icon = config.root.icons[i].icon;
                        }
                }
        }
        return icon;
}

struct pass_entry {
        int sock;
        int port;
        bool ssl;
        SOCKADDR addr;
};

#if defined(__MINGW32__) || defined(_MSC_VER) || defined(__BORLANDC__)
#define NO_RETURN_THREAD
void tw_server_pass(void* ptr) {
#elif defined(__HAIKU__)
int32_t tw_server_pass(void* ptr) {
#elif defined(_PSP) || defined(__PPU__)
int tw_server_pass(void* ptr) {
#endif
#if defined(__HAIKU__) || defined(__MINGW32__) || defined(_PSP) || defined(__PPU__) || defined(_MSC_VER) || defined(__BORLANDC__)
#define FREE_PTR
        int sock = ((struct pass_entry*)ptr)->sock;
        bool ssl = ((struct pass_entry*)ptr)->ssl;
        int port = ((struct pass_entry*)ptr)->port;
        SOCKADDR addr = ((struct pass_entry*)ptr)->addr;
#else
#define NO_RETURN_THREAD
        void tw_server_pass(int sock, bool ssl, int port, SOCKADDR addr) {
#endif
        SSL* s = NULL;
#ifndef NO_SSL
        SSL_CTX* ctx = NULL;
        bool sslworks = false;
        if(ssl) {
                ctx = tw_create_ssl_ctx(port);
                s = SSL_new(ctx);
                SSL_set_fd(s, sock);
                if(SSL_accept(s) <= 0) goto cleanup;
                sslworks = true;
        }
#endif
        char* name = config.hostname;
        char address[513];
        int ret;
        struct tw_http_request req;
        struct tw_http_response res;
        struct tw_tool tools;
#ifndef NO_GETADDRINFO
        struct sockaddr* sa = (struct sockaddr*)&addr;
        getnameinfo(sa, sizeof(addr), address, 512, NULL, 0, NI_NUMERICHOST);
#endif
        address[0] = 0;
#ifdef FREE_PTR
        free(ptr);
#endif

        res._processed = false;
        tw_init_tools(&tools);
        ret = tw_http_parse(s, sock, &req);
        if(ret == 0) {
                char date[513];
                time_t t = time(NULL);
                struct tm* tm = localtime(&t);
                char* useragent = cm_strdup("");
                int i;
                char* tmp;
                char* tmp2;
                char* tmp3;
                char* tmp4;
                char* tmp5;
                char* log;
                char* vhost;
                time_t cmtime;
                bool rej;
                char* host;
                int port;
                struct tw_config_entry* vhost_entry;
                strftime(date, 512, "%a, %d %b %Y %H:%M:%S %Z", tm);

                for(i = 0; req.headers[i] != NULL; i += 2) {
                        if(cm_strcaseequ(req.headers[i], "User-Agent")) {
                                free(useragent);
                                useragent = cm_strdup(req.headers[i + 1]);
                        }
                }

                tmp = cm_strcat3(address, " - [", date);
                tmp2 = cm_strcat3(tmp, "] \"", req.method);
                tmp3 = cm_strcat3(tmp2, " ", req.path);
                tmp4 = cm_strcat3(tmp3, " ", req.version);
                tmp5 = cm_strcat3(tmp4, "\" \"", useragent);
                log = cm_strcat(tmp5, "\"");
                free(tmp);
                free(tmp2);
                free(tmp3);
                free(tmp4);
                free(tmp5);
                free(useragent);
                cm_force_log(log);
                free(log);

                vhost = cm_strdup(config.hostname);
                cmtime = 0;
                if(req.headers != NULL) {
                        for(i = 0; req.headers[i] != NULL; i += 2) {
                                if(cm_strcaseequ(req.headers[i], "Host")) {
                                        free(vhost);
                                        vhost = cm_strdup(req.headers[i + 1]);
                                } else if(cm_strcaseequ(req.headers[i], "If-Modified-Since")) {
                                        struct tm tm;
                                        time_t t;
                                        struct tm* btm;
                                        strptime(req.headers[i + 1], "%a, %d %b %Y %H:%M:%S GMT", &tm);
#if defined(__MINGW32__) || defined(_PSP) || defined(__PPU__) || defined(__ps2sdk__) || defined(_MSC_VER) || defined(__BORLANDC__)
                                        t = 0;
                                        btm = localtime(&t);
                                        cmtime = mktime(&tm);
                                        cmtime -= (btm->tm_hour * 60 + btm->tm_min) * 60;
#else
                                                cmtime = timegm(&tm);
#endif
                                }
                        }
                }
                rej = false;
                cm_log("Server", "Host is %s", vhost);
                port = s == NULL ? 80 : 443;
                host = cm_strdup(vhost);
                for(i = 0; vhost[i] != 0; i++) {
                        if(vhost[i] == ':') {
                                host[i] = 0;
                                port = atoi(host + i + 1);
                                break;
                        }
                }
                name = host;
                cm_log("Server", "Hostname is `%s', port is `%d'", host, port);
                vhost_entry = tw_vhost_match(host, port);
#ifdef HAS_CHROOT
                char* chrootpath = vhost_entry->chroot_path != NULL ? vhost_entry->chroot_path : config.root.chroot_path;
                if(chrootpath != NULL) {
                        if(chdir(chrootpath) == 0) {
                                if(chroot(".") == 0) {
                                        cm_log("Server", "Chroot successful");
                                }
                        } else {
                                cm_log("Server", "chdir() failed, cannot chroot");
                                tw_http_error(s, sock, 500, name, port, vhost_entry);
                                rej = true;
                        }
                }
#endif
                for(i = 0; i < config.module_count; i++) {
                        tw_mod_request_t mod_req = (tw_mod_request_t)tw_module_symbol(config.modules[i], "mod_request");
                        if(mod_req != NULL) {
                                int ret = mod_req(&tools, &req, &res);
                                int co = ret & 0xff;
                                if(co == _TW_MODULE_PASS) {
                                        continue;
                                } else if(co == _TW_MODULE_STOP) {
                                        /* Handle response here ... */
                                        res._processed = true;
                                        break;
                                } else if(co == _TW_MODULE_STOP2) {
                                        res._processed = true;
                                        break;
                                } else if(co == _TW_MODULE_ERROR) {
                                        tw_http_error(s, sock, (ret & 0xffff00) >> 8, name, port, vhost_entry);
                                        break;
                                }
                        }
                }
                if(!res._processed) {
                        char* path;
                        char* rpath;
                        struct stat st;
                        char* slash;
                        cm_log("Server", "Document root is %s", vhost_entry->root == NULL ? "not set" : vhost_entry->root);
                        path = cm_strcat(vhost_entry->root == NULL ? "" : vhost_entry->root, req.path);
                        cm_log("Server", "Filesystem path is %s", path);
#if defined(_MSC_VER) || defined(__BORLANDC__)
                        for(i = strlen(path) - 1; i >= 0; i--) {
                                if(path[i] == '/') {
                                        path[i] = 0;
                                } else {
                                        break;
                                }
                        }
#endif
#if defined(__MINGW32__) || defined(_MSC_VER) || defined(__BORLANDC__)
                        rpath = cm_strdup(path);
                        for(i = strlen(rpath) - 1; i >= 0; i--) {
                                if(rpath[i] == '/') {
                                        int j;
                                        for(j = i + 1; rpath[j] != 0; j++) {
                                                if(rpath[j] == ':' || rpath[j] == '.') {
                                                        rpath[j] = 0;
                                                        break;
                                                }
                                        }
                                        break;
                                }
                        }
                        for(i = 0; i < sizeof(reserved_names) / sizeof(reserved_names[0]); i++) {
                                char* n = cm_strcat("/", reserved_names[i]);
                                if(cm_nocase_endswith(rpath, n)) {
                                        tw_http_error(s, sock, 403, name, port, vhost_entry);
                                        free(n);
                                        rej = true;
                                        cm_log("Server", "XP Patch ; rejecting access to device");
                                        break;
                                }
                                free(n);
                        }
                        free(rpath);
#endif
                        if(!rej && stat(path, &st) == 0) {
                                if(!tw_permission_allowed(path, addr, req, vhost_entry)) {
                                        tw_http_error(s, sock, 403, name, port, vhost_entry);
                                } else if(S_ISDIR(st.st_mode)) {
                                        if(req.path[strlen(req.path) - 1] != '/') {
                                                char* headers[3] = {"Location", NULL, NULL};
                                                headers[1] = cm_strcat(req.path, "/");
                                                cm_log("Server", "Accessing directory without the slash at the end");
                                                _tw_process_page(s, sock, tw_http_status(301), NULL, NULL, NULL, 0, headers, 0, 0);
                                                free(headers[1]);
                                        } else {
                                                char** indexes = vhost_entry->index_count == 0 ? config.root.indexes : vhost_entry->indexes;
                                                int index_count = vhost_entry->index_count == 0 ? config.root.index_count : vhost_entry->index_count;
                                                bool found = false;
                                                for(i = 0; i < index_count; i++) {
                                                        char* p = cm_strcat3(path, "/", indexes[i]);
                                                        FILE* f = fopen(p, "rb");
                                                        if(f != NULL) {
                                                                char* ext = NULL;
                                                                int j;
                                                                struct stat st;
                                                                char* mime;
                                                                for(j = strlen(p) - 1; j >= 0; j--) {
                                                                        if(p[j] == '.') {
                                                                                ext = cm_strdup(p + j);
                                                                                break;
                                                                        } else if(p[j] == '/') {
                                                                                break;
                                                                        }
                                                                }
                                                                stat(p, &st);
                                                                mime = tw_get_mime(ext, vhost_entry);
                                                                tw_process_page(s, sock, tw_http_status(200), mime, f, NULL, st.st_size, 0, 0);
                                                                fclose(f);
                                                                if(ext != NULL) free(ext);
                                                                free(p);
                                                                found = true;
                                                                break;
                                                        }
                                                        free(p);
                                                }
                                                if(!found) {
                                                        char* str = malloc(1);
                                                        char** items;
                                                        int readme;
                                                        char** readmes;
                                                        int readme_count;
                                                        int hp;
                                                        str[0] = 0;
                                                        items = cm_scandir(path);
                                                        addstring(&str, "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 3.2 Final//EN\">\n");
                                                        addstring(&str, "<html>\n");
                                                        addstring(&str, "       <head>\n");
                                                        addstring(&str, "               <meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\">\n");
                                                        addstring(&str, "               <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">\n");
                                                        addstring(&str, "               <title>Index of %h</title>\n", req.path);
                                                        addstring(&str, "       </head>\n");
                                                        addstring(&str, "       <body>\n");
                                                        addstring(&str, "               <h1>Index of %h</h1>\n", req.path);
                                                        addstring(&str, "               <hr>\n");
                                                        addstring(&str, "               <table border=\"0\">\n");
                                                        addstring(&str, "                       <tr>\n");
                                                        addstring(&str, "                               <th></th>\n");
                                                        addstring(&str, "                               <th>Filename</th>\n");
                                                        addstring(&str, "                               <th>MIME</th>\n");
                                                        addstring(&str, "                               <th>Size</th>\n");
                                                        addstring(&str, "                       </tr>\n");
                                                        readme = -1;
                                                        readmes = vhost_entry->readme_count == 0 ? config.root.readmes : vhost_entry->readmes;
                                                        readme_count = vhost_entry->readme_count == 0 ? config.root.readme_count : vhost_entry->readme_count;
                                                        if(items != NULL) {
                                                                int phase = 0;
                                                        doit:
                                                                for(i = 0; items[i] != NULL; i++) {
                                                                        int j;
                                                                        char* ext;
                                                                        char* itm;
                                                                        char* icon;
                                                                        char* fpth = cm_strcat3(path, "/", items[i]);
                                                                        struct stat s;
                                                                        char size[512];
                                                                        char* showmime;
                                                                        char* mime;
                                                                        size[0] = 0;
                                                                        stat(fpth, &s);
                                                                        if(phase == 0 && !S_ISDIR(s.st_mode)) {
                                                                                free(fpth);
                                                                                continue;
                                                                        } else if(phase == 1 && S_ISDIR(s.st_mode)) {
                                                                                free(fpth);
                                                                                continue;
                                                                        }
                                                                        if(readme == -1) {
                                                                                for(j = 0; j < readme_count; j++) {
                                                                                        if(strcmp(items[i], readmes[j]) == 0) {
                                                                                                readme = j;
                                                                                                break;
                                                                                        }
                                                                                }
                                                                                if(readme != -1) {
                                                                                        free(fpth);
                                                                                        continue;
                                                                                }
                                                                        }
                                                                        if(s.st_size < NUM1024) {
                                                                                sprintf(size, "%d", (int)s.st_size);
                                                                        } else if(s.st_size < NUM1024 * 1024) {
                                                                                sprintf(size, "%.1fK", (double)s.st_size / 1024);
                                                                        } else if(s.st_size < NUM1024 * 1024 * 1024) {
                                                                                sprintf(size, "%.1fM", (double)s.st_size / 1024 / 1024);
                                                                        } else if(s.st_size < NUM1024 * 1024 * 1024 * 1024) {
                                                                                sprintf(size, "%.1fG", (double)s.st_size / 1024 / 1024 / 1024);
                                                                        } else if(s.st_size < NUM1024 * 1024 * 1024 * 1024 * 1024) {
                                                                                sprintf(size, "%.1fT", (double)s.st_size / 1024 / 1024 / 1024 / 1024);
                                                                        }

                                                                        free(fpth);

                                                                        ext = NULL;
                                                                        for(j = strlen(items[i]) - 1; j >= 0; j--) {
                                                                                if(items[i][j] == '.') {
                                                                                        ext = cm_strdup(items[i] + j);
                                                                                        break;
                                                                                } else if(items[i][j] == '/') {
                                                                                        break;
                                                                                }
                                                                        }
                                                                        showmime = "";
                                                                        mime = tw_get_mime(ext, vhost_entry);
                                                                        if(strcmp(items[i], "../") == 0) {
                                                                                mime = "misc/parent";
                                                                                size[0] = 0;
                                                                        } else if(items[i][strlen(items[i]) - 1] == '/') {
                                                                                mime = "misc/dir";
                                                                                size[0] = 0;
                                                                        } else {
                                                                                showmime = mime;
                                                                        }
                                                                        icon = tw_get_icon(mime, vhost_entry);
                                                                        if(ext != NULL) free(ext);
                                                                        itm = cm_strdup(items[i]);
                                                                        if(strlen(itm) >= 32) {
                                                                                if(itm[strlen(itm) - 1] == '/') {
                                                                                        itm[31] = 0;
                                                                                        itm[30] = '/';
                                                                                        itm[29] = '.';
                                                                                        itm[28] = '.';
                                                                                        itm[27] = '.';
                                                                                } else {
                                                                                        itm[31] = 0;
                                                                                        itm[30] = '.';
                                                                                        itm[29] = '.';
                                                                                        itm[28] = '.';
                                                                                }
                                                                        }
                                                                        addstring(&str, "<tr>\n");
                                                                        addstring(&str, "       <td><img src=\"%s\" alt=\"icon\"></td>\n", icon);
                                                                        addstring(&str, "       <td><a href=\"%l\"><code>%h</code></a></td>\n", items[i], itm);
                                                                        addstring(&str, "       <td><code>  %h  </code></td>\n", showmime);
                                                                        addstring(&str, "       <td><code>  %s  </code></td>\n", size);
                                                                        addstring(&str, "</tr>\n");
                                                                        free(itm);
                                                                }
                                                                phase++;
                                                                if(phase != 2) goto doit;
                                                                for(i = 0; items[i] != NULL; i++) free(items[i]);
                                                                free(items);
                                                        }
                                                        addstring(&str, "               </table>\n");
                                                        if(readme != -1) {
                                                                struct stat s;
                                                                FILE* fr;
                                                                char* fpth;
                                                                addstring(&str, "<hr>\n");
                                                                fpth = cm_strcat3(path, "/", readmes[readme]);
                                                                stat(fpth, &s);
                                                                fr = fopen(fpth, "r");
                                                                if(fr != NULL) {
                                                                        char* rmbuf = malloc(s.st_size + 1);
                                                                        rmbuf[s.st_size] = 0;
                                                                        fread(rmbuf, s.st_size, 1, fr);
                                                                        addstring(&str, "<pre><code>%h</code></pre>\n", rmbuf);
                                                                        fclose(fr);
                                                                        free(rmbuf);
                                                                }
                                                                free(fpth);
                                                        }
                                                        addstring(&str, "               <hr>\n");
                                                        hp = vhost_entry->hideport == -1 ? config.root.hideport : vhost_entry->hideport;
                                                        if(hp == 0) {
                                                                addstring(&str, "               <address>%s Server at %s Port %d</address>\n", tw_server, name, port);
                                                        } else {
                                                                addstring(&str, "               <address>%s Server at %s</address>\n", tw_server, name, port);
                                                        }
                                                        addstring(&str, "       </body>\n");
                                                        addstring(&str, "</html>\n");
                                                        tw_process_page(s, sock, tw_http_status(200), "text/html", NULL, str, strlen(str), 0, 0);
                                                        free(str);
                                                }
                                        }
                                } else {
                                        char* ext = NULL;
                                        char* mime;
                                        FILE* f;
                                        for(i = strlen(req.path) - 1; i >= 0; i--) {
                                                if(req.path[i] == '.') {
                                                        ext = cm_strdup(req.path + i);
                                                        break;
                                                } else if(req.path[i] == '/') {
                                                        break;
                                                }
                                        }
                                        mime = tw_get_mime(ext, vhost_entry);
                                        if(ext != NULL) free(ext);
                                        f = fopen(path, "rb");
                                        if(f == NULL) {
                                                tw_http_error(s, sock, 403, name, port, vhost_entry);
                                        } else {
                                                tw_process_page(s, sock, tw_http_status(200), mime, f, NULL, st.st_size, st.st_mtime, cmtime);
                                                fclose(f);
                                        }
                                }
                        } else {
                                if(!rej) {
                                        tw_http_error(s, sock, 404, name, port, vhost_entry);
                                }
                        }
                        free(path);
                }
                free(vhost);
                free(host);
        } else if(ret == -1) {
        } else {
                tw_http_error(s, sock, 400, name, port, &config.root);
        }
        tw_free_request(&req);
cleanup:
#ifndef NO_SSL
        if(sslworks) {
                SSL_shutdown(s);
        }
        SSL_free(s);
#endif
        close_socket(sock);
#if defined(__MINGW32__) || defined(_MSC_VER) || defined(__BORLANDC__)
        _endthread();
#elif defined(__HAIKU__)
                exit_thread(0);
#endif
#ifndef NO_RETURN_THREAD
        return 0;
#endif
}

#ifdef SERVICE
extern SERVICE_STATUS status;
extern SERVICE_STATUS_HANDLE status_handle;
#endif

#if defined(__MINGW32__) || defined(__HAIKU__) || defined(_MSC_VER) || defined(__BORLANDC__)
struct thread_entry {
#ifdef __HAIKU__
        thread_id thread;
#else
        HANDLE handle;
#endif
        bool used;
};
#endif

extern int running;

void tw_server_loop(void) {
        int i;
#ifndef USE_POLL
        fd_set fdset;
        struct timeval tv;
#endif
#if defined(__MINGW32__) || defined(__HAIKU__) || defined(_MSC_VER) || defined(__BORLANDC__)
        struct thread_entry threads[2048];
        for(i = 0; i < sizeof(threads) / sizeof(threads[0]); i++) {
                threads[i].used = false;
        }
#endif
#ifdef USE_POLL
        struct pollfd pollfds[sockcount];
        for(i = 0; i < sockcount; i++) {
                pollfds[i].fd = sockets[i];
                pollfds[i].events = POLLIN | POLLPRI;
        }
#endif
        while(running) {
                int ret;
#ifdef USE_POLL
                ret = poll(pollfds, sockcount, 1000);
#else
                        FD_ZERO(&fdset);
                        for(i = 0; i < sockcount; i++) {
                                FD_SET(sockets[i], &fdset);
                        }
                        tv.tv_sec = 1;
                        tv.tv_usec = 0;
#ifdef __HAIKU__
                        ret = select(32, &fdset, NULL, NULL, &tv);
#else
                        ret = select(FD_SETSIZE, &fdset, NULL, NULL, &tv);
#endif
#endif
                if(ret == -1) {
#if !defined(__MINGW32__) && !defined(_MSC_VER) && !defined(__BORLANDC__)
                        cm_log("Server", "Select failure: %s", strerror(errno));
#endif
                        break;
                } else if(ret == 0) {
#ifdef SERVICE
                        if(status.dwCurrentState == SERVICE_STOP_PENDING) {
                                break;
                        }
#endif
                } else if(ret > 0) {
                        /* connection */
                        int i;
                        for(i = 0; i < sockcount; i++) {
                                bool cond;
#ifdef USE_POLL
                                cond = pollfds[i].revents & POLLIN;
#else
                                        cond = FD_ISSET(sockets[i], &fdset);
#endif
                                if(cond) {
                                        SOCKADDR claddr;
                                        socklen_t clen = sizeof(claddr);
                                        int sock = accept(sockets[i], (struct sockaddr*)&claddr, &clen);
#if defined(__MINGW32__) || defined(__HAIKU__) || defined(_PSP) || defined(__PPU__) || defined(_MSC_VER) || defined(__BORLANDC__)
                                        int j;
                                        struct pass_entry* e = malloc(sizeof(*e));
                                        cm_log("Server", "New connection accepted");
                                        e->sock = sock;
#if defined(_MSC_VER) || defined(__BORLANDC__)
                                        e->ssl = config.ports[i] & (1UL << 31);
#else
                                        e->ssl = config.ports[i] & (1ULL << 31);
#endif
                                        e->port = config.ports[i];
                                        e->addr = claddr;
#endif
#if defined(__MINGW32__) || defined(_MSC_VER) || defined(__BORLANDC__)
                                        _beginthread(tw_server_pass, 0, e);
#elif defined(_PSP) || defined(__PPU__)
                                                tw_server_pass(e);
#elif defined(__HAIKU__)
                                        for(j = 0; j < sizeof(threads) / sizeof(threads[0]); j++) {
                                                if(threads[j].used) {
                                                        thread_info info;
                                                        bool kill = false;
                                                        if(get_thread_info(threads[j].thread, &info) == B_OK) {
                                                        } else {
                                                                kill = true;
                                                        }
                                                        if(kill) {
                                                                threads[j].used = false;
                                                        }
                                                }
                                        }
                                        for(j = 0; j < sizeof(threads) / sizeof(threads[0]); j++) {
                                                if(!threads[j].used) {
                                                        threads[j].thread = spawn_thread(tw_server_pass, "Tewi HTTPd", 60, e);
                                                        threads[j].used = true;
                                                        resume_thread(threads[j].thread);
                                                        break;
                                                }
                                        }
#else
                                        pid_t pid = fork();
                                        if(pid == 0) {
                                                int j;
                                                for(j = 0; j < sockcount; j++) close_socket(sockets[j]);
                                                tw_server_pass(sock, config.ports[i] & (1ULL << 31), config.ports[i], claddr);
                                                _exit(0);
                                        } else {
                                                close_socket(sock);
                                        }
#endif
                                }
                        }
                }
        }
}