kuhttpd/kuhttpd.c

/**
 * @PROJECT			Kagera uHTTP Daemon
 * @COPYRIGHT		See COPYING in the top level directory
 * @FILE			kuhttpd.c
 * @PURPOSE			HTTP Server
 * @DEVELOPERS		Eric Bishop <eric@gargoyle-router.com>
 *					Rafal Kupiec <belliash@asiotec.eu.org>
 *					Jef Poskanzer <jef@acme.com>
 */

#include <unistd.h>
#include <stdlib.h>
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
#include <syslog.h>
#include <limits.h>
#include <sys/param.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <time.h>
#include <pwd.h>
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <ctype.h>
#include <sys/wait.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <dirent.h>

#include <cyassl/openssl/ssl.h>
#include <cyassl/openssl/err.h>
#include <cyassl/error.h>

#ifdef CROSS_BUILD
	#include <cyassl/cyassl_error.h>
#endif

#include "kuhttpd.h"
#include "dateparse.h"
#include "match.h"
#include "mime_enc.h"
#include "mime_typ.h"

static void add_headers(int s, char* title, char* extra_header, char* me, char* mt, off_t b, time_t mod) {
	time_t now;
	char timebuf[100];
	char buf[10000];
	int buflen;
	const char* rfc1123_fmt = "%a, %d %b %Y %H:%M:%S GMT";

	status = s;
	bytes = b;
	make_log_entry();
	start_response();
	buflen = snprintf(buf, sizeof(buf), "%s %d %s\015\012", protocol, status, title);
	add_to_response(buf, buflen);
	buflen = snprintf(buf, sizeof(buf), "Server: %s\015\012", SERVER_SOFTWARE);
	add_to_response(buf, buflen);
	now = time((time_t*) 0);
	(void) strftime(timebuf, sizeof(timebuf), rfc1123_fmt, gmtime(&now));
	buflen = snprintf(buf, sizeof(buf), "Date: %s\015\012", timebuf);
	add_to_response(buf, buflen);
	buflen = snprintf(buf, sizeof(buf), "Expires: %s\015\012", timebuf);
	add_to_response(buf, buflen);
	if(mod != (time_t) -1) {
		(void) strftime(timebuf, sizeof(timebuf), rfc1123_fmt, gmtime(&mod));
		buflen = snprintf(buf, sizeof(buf), "Last-Modified: %s\015\012", timebuf);
		add_to_response(buf, buflen);
	}
	if(extra_header != (char*) 0 && extra_header[0] != '\0') {
		buflen = snprintf(buf, sizeof(buf), "%s\015\012", extra_header);
		add_to_response(buf, buflen);
	}
	if(me != (char*) 0 && me[0] != '\0') {
		buflen = snprintf(buf, sizeof(buf), "Content-Encoding: %s\015\012", me);
		add_to_response(buf, buflen);
	}
	if(mt != (char*) 0 && mt[0] != '\0') {
		buflen = snprintf(buf, sizeof(buf), "Content-Type: %s\015\012", mt);
		add_to_response(buf, buflen);
	}
	if(bytes >= 0) {
		buflen = snprintf(buf, sizeof(buf), "Content-Length: %lld\015\012", (long long int) bytes);
		add_to_response(buf, buflen);
	}
	if(p3p != (char*) 0 && p3p[0] != '\0') {
		buflen = snprintf(buf, sizeof(buf), "P3P: %s\015\012", p3p);
		add_to_response(buf, buflen);
	}
	buflen = snprintf(buf, sizeof(buf), "\015\012");
	add_to_response(buf, buflen);
}

static void add_to_buf(char** bufP, size_t* bufsizeP, size_t* buflenP, char* str, size_t len) {
	if(*bufsizeP == 0) {
		*bufsizeP = len + 500;
		*buflenP = 0;
		*bufP = (char*) e_malloc(*bufsizeP);
	} else if(*buflenP + len >= *bufsizeP) {
		*bufsizeP = *buflenP + len + 500;
		*bufP = (char*) e_realloc((void*) *bufP, *bufsizeP);
	}
	(void) memmove(&((*bufP)[*buflenP]), str, len);
	*buflenP += len;
	(*bufP)[*buflenP] = '\0';
}

static void add_to_request(char* str, size_t len) {
	add_to_buf(&request, &request_size, &request_len, str, len);
}

static void add_to_response(char* str, size_t len) {
	add_to_buf(&response, &response_size, &response_len, str, len);
}

static void auth_check(char* dirname, int is_ssl) {
	char authpath[10000];
	char realmName[500];
	struct stat sb;
	char authinfo[500];
	char* authpass;
	char* colon;
	static char line[10000];
	int l;
	FILE* fp;
	char* cryp;

	if(dirname[strlen(dirname) - 1] == '/') {
		(void) snprintf(authpath, sizeof(authpath), "%s%s", dirname, AUTH_FILE);
	} else {
		(void) snprintf(authpath, sizeof(authpath), "%s/%s", dirname, AUTH_FILE);
	}
	if(stat(authpath, &sb) < 0) {
		if(defaultRealmName == NULL || defaultRealmPasswordFile == NULL) {
			return;
		} else {
			snprintf(authpath, sizeof(authpath), "%s", defaultRealmPasswordFile);
		}
	}
	if(strcmp(authpath, defaultRealmPasswordFile) == 0) {
		snprintf(realmName, sizeof(realmName), "%s", defaultRealmName);
	} else {
		snprintf(realmName, sizeof(realmName), "%s", dirname);
	}
	if(authorization == (char*) 0) {
		send_authenticate(realmName, is_ssl);
	}
	if(strncmp(authorization, "Basic ", 6) != 0) {
		send_authenticate(realmName, is_ssl);
	}
	l = b64_decode(&(authorization[6]), (unsigned char*) authinfo, sizeof(authinfo) - 1);
	authinfo[l] = '\0';
	authpass = strchr(authinfo, ':');
	if(authpass == (char*) 0) {
		send_authenticate(realmName, is_ssl);
	}
	*authpass++ = '\0';
	colon = strchr(authpass, ':');
	if(colon != (char*) 0) {
		*colon = '\0';
	}
	fp = fopen(authpath, "r");
	if(fp == (FILE*) 0) {
		syslog(LOG_ERR, "%.80s auth file %.80s could not be opened - %m", ntoa(&client_addr), authpath);
		send_error(403, "Forbidden", "", "File is protected.", is_ssl);
	}
	while(fgets(line, sizeof(line), fp) != (char*) 0) {
		l = strlen(line);
		if(line[l - 1] == '\n') {
			line[l - 1] = '\0';
		}
		cryp = strchr(line, ':');
		if(cryp == (char*) 0) {
			continue;
		}
		*cryp++ = '\0';
		if(strcmp(line, authinfo) == 0) {
			(void) fclose(fp);
			if(strcmp(crypt(authpass, cryp), cryp) == 0) {
				remoteuser = line;
				return;
			} else {
				send_authenticate(realmName, is_ssl);
			}
		}
	}
	(void) fclose(fp);
	send_authenticate(realmName, is_ssl);
}

static int b64_decode(const char* str, unsigned char* space, int size) {
	const char* cp;
	int space_idx, phase;
	int d, prev_d = 0;
	unsigned char c;

	space_idx = 0;
	phase = 0;
	for(cp = str; *cp != '\0'; ++cp) {
		d = b64_decode_table[(int) *cp];
		if(d != -1) {
			switch(phase) {
				case 0:
					++phase;
					break;
				case 1:
					c = ((prev_d << 2) | ((d & 0x30) >> 4));
					if(space_idx < size) {
						space[space_idx++] = c;
					}
					++phase;
					break;
				case 2:
					c = (((prev_d & 0xf) << 4) | ((d & 0x3c) >> 2));
					if(space_idx < size) {
						space[space_idx++] = c;
					}
					++phase;
					break;
				case 3:
					c = (((prev_d & 0x03) << 6) | d);
					if(space_idx < size) {
						space[space_idx++] = c;
					}
					phase = 0;
				break;
			}
			prev_d = d;
		}
	}
	return space_idx;
}

static char* build_env(char* fmt, char* arg) {
	char* cp;
	int size;
	static char* buf;
	static int maxbuf = 0;

	size = strlen(fmt) + strlen(arg);
	if(size > maxbuf) {
		if(maxbuf == 0) {
			maxbuf = MAX(200, size + 100);
			buf = (char*) e_malloc(maxbuf);
		} else {
			maxbuf = MAX(maxbuf * 2, size * 5 / 4);
			buf = (char*) e_realloc((void*) buf, maxbuf);
		}
	}
	(void) snprintf(buf, maxbuf, fmt, arg);
	cp = e_strdup(buf);
	return cp;
}

static void cgi_interpose_input(int wfd, int is_ssl) {
	size_t c;
	ssize_t r, r2;
	char buf[1024];

	c = request_len - request_idx;
	if(c > 0) {
		if(write(wfd, &(request[request_idx]), c) != c) {
			return;
		}
	}
	while(c < content_length) {
		r = my_read(buf, MIN( sizeof(buf), content_length - c), is_ssl);
		if(r < 0 && (errno == EINTR || errno == EAGAIN)) {
			sleep(1);
			continue;
		}
		if(r <= 0) {
			return;
		}
		for(;;) {
			r2 = write(wfd, buf, r);
			if(r2 < 0 && (errno == EINTR || errno == EAGAIN)) {
				sleep(1);
				continue;
			}
			if(r2 != r) {
				return;
			}
			break;
		}
		c += r;
	}
	post_post_garbage_hack(is_ssl);
}

static void cgi_interpose_output(int rfd, int parse_headers, int is_ssl) {
	ssize_t r, r2;
	char buf[1024];
	
	if(!parse_headers) {
		char http_head[] = "HTTP/1.0 200 OK\015\012";
		(void) my_write(http_head, sizeof(http_head), is_ssl);
	} else {
		size_t headers_size, headers_len;
		char* headers;
		char* br;
		int status;
		char* title;
		char* cp;
		headers_size = 0;
		add_to_buf(&headers, &headers_size, &headers_len, (char*) 0, 0);
		for(;;) {
			r = read(rfd, buf, sizeof(buf));
			if(r < 0 && (errno == EINTR || errno == EAGAIN)) {
				sleep(1);
				continue;
			}
			if(r <= 0) {
				br = &(headers[headers_len]);
				break;
			}
			add_to_buf(&headers, &headers_size, &headers_len, buf, r);
			if((br = strstr(headers, "\015\012\015\012")) != (char*) 0 || (br = strstr(headers, "\012\012")) != (char*) 0) {
				break;
			}
		}
		if(headers[0] == '\0') {
			return;
		}
		status = 200;
		if((cp = strstr(headers, "Status:")) != (char*) 0 && cp < br && (cp == headers || *(cp-1) == '\012')) {
			cp += 7;
			cp += strspn(cp, " \t");
			status = atoi(cp);
		}
		if((cp = strstr(headers, "Location:")) != (char*) 0 && cp < br && (cp == headers || *(cp-1) == '\012')) {
			status = 302;
		}
		switch(status) {
			case 200:
				title = "OK";
				break;
			case 302:
				title = "Found";
				break;
			case 304:
				title = "Not Modified";
				break;
			case 400:
				title = "Bad Request";
				break;
			case 401:
				title = "Unauthorized";
				break;
			case 403:
				title = "Forbidden";
				break;
			case 404:
				title = "Not Found";
				break;
			case 408:
				title = "Request Timeout";
				break;
			case 500:
				title = "Internal Error";
				break;
			case 501:
				title = "Not Implemented";
				break;
			case 503:
				title = "Service Temporarily Overloaded";
				break;
			default:
				title = "Something";
				break;
		}
		(void) snprintf(buf, sizeof(buf), "HTTP/1.0 %d %s\015\012", status, title);
		(void) my_write(buf, strlen(buf), is_ssl);
		if(strstr(headers, "Server:") == NULL) {
			char line[200];
			sprintf(line, "Server: %s\015\012", SERVER_SOFTWARE);
			(void) my_write(line, strlen(line), is_ssl);
		}
		if(strstr(headers, "Date:") == NULL) {
			char line[200];
			char timebuf[100];
			time_t now = time((time_t*) 0);
			const char* rfc1123_fmt = "%a, %d %b %Y %H:%M:%S GMT";
			(void) strftime(timebuf, sizeof(timebuf), rfc1123_fmt, gmtime(&now));
			sprintf(line, "Date: %s\015\012", timebuf);
			(void) my_write(line, strlen(line), is_ssl);
			if(strstr(headers, "Expires:") == NULL) {
				sprintf(line, "Expires: %s\015\012", timebuf);
				(void) my_write(line, strlen(line), is_ssl);
			}
		} else if(strstr(headers, "Expires:") == NULL) {
			char* line = "Expires: Thu, 01 Jan 1970 00:00:00 GMT\015\012";
			(void) my_write(line, strlen(line), is_ssl);
		}
		(void) my_write(headers, headers_len, is_ssl);
	}
	for(;;) {
		r = read(rfd, buf, sizeof(buf));
		if(r < 0 && (errno == EINTR || errno == EAGAIN)) {
			sleep(1);
			continue;
		}
		if(r <= 0) {
			goto done;
		}
		for(;;) {
			r2 = my_write(buf, r, is_ssl);
			if(r2 < 0 && (errno == EINTR || errno == EAGAIN)) {
				sleep(1);
				continue;
			}
			if(r2 != r) {
				goto done;
			}
			break;
		}
	}
done:
	shutdown(conn_fd, SHUT_WR);
}

static void check_referer(int is_ssl) {
	char* cp;

	if(url_pattern == (char*) 0) {
		return;
	}
	if(really_check_referer()) {
		return;
	}
	cp = hostname;
	if(cp == (char*) 0) {
		cp = "";
	}
	syslog(LOG_INFO, "%.80s non-local referer \"%.80s%.80s\" \"%.80s\"", ntoa(&client_addr), cp, path, referer);
	send_error(403, "Forbidden", "", "You must supply a local referer.", is_ssl);
}

static void clear_ndelay(int fd) {
	int flags, newflags;

	flags = fcntl(fd, F_GETFL, 0);
	if(flags != -1) {
		newflags = flags & ~ (int) O_NDELAY;
		if(newflags != flags) {
			(void) fcntl(fd, F_SETFL, newflags);
		}
	}
}

static void de_dotdot(char* file) {
	char* cp;
	char* cp2;
	int l;

	while((cp = strstr(file, "//")) != (char*) 0) {
		for(cp2 = cp + 2; *cp2 == '/'; ++cp2) {
			continue;
		}
		(void) strcpy(cp + 1, cp2);
	}
	while(strncmp(file, "./", 2) == 0) {
		(void) strcpy(file, file + 2);
	}
	while((cp = strstr( file, "/./")) != (char*) 0) {
		(void) strcpy(cp, cp + 2);
	}
	for(;;) {
		while(strncmp(file, "../", 3) == 0) {
			(void) strcpy( file, file + 3 );
		}
		cp = strstr(file, "/../");
		if(cp == (char*) 0) {
			break;
		}
		for(cp2 = cp - 1; cp2 >= file && *cp2 != '/'; --cp2) {
			continue;
		}
		(void) strcpy(cp2 + 1, cp + 4);
	}
	while((l = strlen(file)) > 3 && strcmp((cp = file + l - 3), "/..") == 0) {
		for(cp2 = cp - 1; cp2 >= file && *cp2 != '/'; --cp2) {
			continue;
		}
		if(cp2 < file) {
			break;
		}
		*cp2 = '\0';
	}
}

static void do_cgi(int is_ssl, unsigned short conn_port) {
	char** argp;
	char** envp;
	int parse_headers;
	char* binary;
	char* directory;

	if(method != METHOD_GET && method != METHOD_POST) {
		send_error(501, "Not Implemented", "", "That method is not implemented for CGI.", is_ssl);
	}
	if(conn_fd == STDIN_FILENO || conn_fd == STDOUT_FILENO || conn_fd == STDERR_FILENO) {
		int newfd = dup2(conn_fd, STDERR_FILENO + 1);
		if(newfd >= 0) {
			conn_fd = newfd;
		}
	}
	envp = make_envp(is_ssl, conn_port);
	argp = make_argp();
	if((method == METHOD_POST && request_len > request_idx) || is_ssl) {
		int p[2];
		int r;
		if(pipe(p) < 0) {
			send_error(500, "Internal Error", "", "Something unexpected went wrong making a pipe.", is_ssl);
		}
		r = fork();
		if(r < 0) {
			send_error(500, "Internal Error", "", "Something unexpected went wrong forking an interposer.", is_ssl);
		}
		if(r == 0) {
			(void) close(p[0]);
			cgi_interpose_input(p[1], is_ssl);
			exit(0);
		}
		(void) close(p[1]);
		if(p[0] != STDIN_FILENO) {
			(void) dup2(p[0], STDIN_FILENO);
			(void) close(p[0]);
		}
	} else {
		if(conn_fd != STDIN_FILENO) {
			(void) dup2(conn_fd, STDIN_FILENO);
		}
	}
	if(strncmp(argp[0], "nph-", 4) == 0) {
		parse_headers = 0;
	} else {
		parse_headers = 1;
	}
	if(parse_headers || is_ssl) {
		int p[2];
		int r;
		if(pipe(p) < 0) {
			send_error(500, "Internal Error", "", "Something unexpected went wrong making a pipe.", is_ssl);
		}
		r = fork();
		if(r < 0) {
			send_error(500, "Internal Error", "", "Something unexpected went wrong forking an interposer.", is_ssl);
		}
		if(r == 0) {
			(void) close(p[1]);
			cgi_interpose_output(p[0], parse_headers, is_ssl);
			exit(0);
		}
		(void) close(p[0]);
		if(p[1] != STDOUT_FILENO) {
			(void) dup2(p[1], STDOUT_FILENO);
		}
		if(p[1] != STDERR_FILENO) {
			(void) dup2(p[1], STDERR_FILENO);
		}
		if(p[1] != STDOUT_FILENO && p[1] != STDERR_FILENO) {
			(void) close(p[1]);
		}
	} else {
		if(conn_fd != STDOUT_FILENO) {
			(void) dup2(conn_fd, STDOUT_FILENO);
		}
		if(conn_fd != STDERR_FILENO) {
			(void) dup2(conn_fd, STDERR_FILENO);
		}
	}
	if(logfp != (FILE*) 0) {
		(void) fclose(logfp);
	}
	closelog();
	if(nice(CGI_NICE) < 0) { ; }
	directory = e_strdup(file);
	binary = strrchr(directory, '/');
	if(binary == (char*) 0) {
		binary = file;
	} else {
		*binary++ = '\0';
		if(chdir(directory) < 0) { ; }
	}
	(void) signal(SIGPIPE, SIG_DFL);
	(void) execve(binary, argp, envp);
	send_error(500, "Internal Error", "", "Something unexpected went wrong running a CGI program.", is_ssl);
}

static void do_dir(int is_ssl) {
	char buf[10000];
	size_t buflen;
	char* contents;
	size_t contents_size, contents_len;
	int n, i;
	struct dirent **dl;
	char* name_info;

	if(pathinfo != (char*) 0) {
		send_error(404, "Not Found", "", "File not found.", is_ssl);
	}
	auth_check(file, is_ssl);
	check_referer(is_ssl);
	n = scandir(file, &dl, NULL, alphasort);
	if(n < 0) {
		syslog(LOG_INFO, "%.80s Directory \"%.80s\" is protected", ntoa(&client_addr), path);
		send_error(403, "Forbidden", "", "Directory is protected.", is_ssl);
	}
	contents_size = 0;
	buflen = snprintf(buf, sizeof(buf), "<html>\n<head><title>Index of %s</title></head>\n<body bgcolor=\"#FFFFFF\">\n<h1>Index of %s</h1><hr><pre>\n", file, file);
	add_to_buf(&contents, &contents_size, &contents_len, buf, buflen);
	for(i = 0; i < n; ++i) {
		if(strcmp(dl[i]->d_name, ".") == 0) {
			continue;
		}
		name_info = file_details(file, dl[i]->d_name);
		add_to_buf(&contents, &contents_size, &contents_len, name_info, strlen(name_info));
	}
	buflen = snprintf(buf, sizeof(buf), "</pre><hr>\n%s\n</body>\n</html>\n", SERVER_SOFTWARE);
	add_to_buf(&contents, &contents_size, &contents_len, buf, buflen);
	add_headers(200, "Ok", "", "", "text/html; charset=%s", contents_len, sb.st_mtime);
	if(method != METHOD_HEAD) {
		add_to_response(contents, contents_len);
	}
	send_response(is_ssl);
}

static void do_file(int is_ssl, unsigned short conn_port) {
	char buf[10000];
	char mime_encodings[500];
	const char* mime_type;
	char fixed_mime_type[500];
	char* cp;
	int fd;

	(void) strncpy(buf, file, sizeof(buf));
	cp = strrchr(buf, '/');
	if(cp == (char*) 0) {
		(void) strcpy(buf, ".");
	} else {
		*cp = '\0';
	}
	auth_check(buf, is_ssl);
	if(strcmp(file, AUTH_FILE) == 0 || (strcmp(&(file[strlen(file) - sizeof(AUTH_FILE) + 1]), AUTH_FILE) == 0 && file[strlen(file) - sizeof(AUTH_FILE)] == '/')) {
		syslog(LOG_NOTICE, "%.80s URL \"%.80s\" tried to retrieve an auth file", ntoa(&client_addr), path);
		send_error(403, "Forbidden", "", "File is protected.", is_ssl);
	}
	if(defaultRealmName != NULL && defaultRealmPasswordFile != NULL) {
		if(strcmp(file, defaultRealmPasswordFile) == 0 || strcmp(&(file[strlen(file) - sizeof(defaultRealmPasswordFile) + 1]), defaultRealmPasswordFile) == 0 && file[strlen(file) - sizeof(defaultRealmPasswordFile)] == '/') {
			syslog(LOG_NOTICE, "%.80s URL \"%.80s\" tried to retrieve an auth file", ntoa(&client_addr), path);
			send_error(403, "Forbidden", "", "File is protected.", is_ssl);
		}
	}
	check_referer(is_ssl);
	if(cgi_pattern != (char*) 0 && match(cgi_pattern, file)) {
		do_cgi(is_ssl, conn_port);
		return;
	} else if(pathinfo != (char*) 0) {
		send_error(404, "Not Found", "", "File not found.", is_ssl);
	}
	fd = open(file, O_RDONLY);
	if(fd < 0) {
		syslog(LOG_INFO, "%.80s File \"%.80s\" is protected", ntoa(&client_addr), path);
		send_error(403, "Forbidden", "", "File is protected.", is_ssl);
	}
	mime_type = figure_mime(file, mime_encodings, sizeof(mime_encodings));
	(void) snprintf(fixed_mime_type, sizeof(fixed_mime_type), mime_type, charset);
	if(if_modified_since != (time_t) -1 && if_modified_since >= sb.st_mtime) {
		add_headers(304, "Not Modified", "", mime_encodings, fixed_mime_type, (off_t) -1, sb.st_mtime);
		send_response(is_ssl);
		return;
	}
	add_headers(200, "Ok", "", mime_encodings, fixed_mime_type, sb.st_size, sb.st_mtime);
	send_response(is_ssl);
	if(method == METHOD_HEAD) {
		return;
	}
	if(sb.st_size > 0) {
		send_via_write(fd, sb.st_size, is_ssl);
	}
	(void) close(fd);
}

static void* e_malloc(size_t size) {
	void* ptr;

	ptr = malloc(size);
	if(ptr == (void*) 0) {
		syslog(LOG_CRIT, "out of memory");
		(void) fprintf(stderr, "%s: out of memory\n", argv0);
		exit(1);
	}
	return ptr;
}

static void* e_realloc(void* optr, size_t size) {
	void* ptr;

	ptr = realloc(optr, size);
	if(ptr == (void*) 0) {
		syslog(LOG_CRIT, "out of memory");
		(void) fprintf(stderr, "%s: out of memory\n", argv0);
		exit(1);
	}
	return ptr;
}

static char* e_strdup(char* ostr) {
	char* str;

	str = strdup(ostr);
	if(str == (char*) 0) {
		syslog(LOG_CRIT, "out of memory copying a string");
		(void) fprintf(stderr, "%s: out of memory copying a string\n", argv0);
		exit(1);
	}
	return str;
}

static int ext_compare(struct mime_entry* a, struct mime_entry* b) {
	return strcmp(a->ext, b->ext);
}

static const char* figure_mime(char* name, char* me, size_t me_size) {
	char* prev_dot;
	char* dot;
	char* ext;
	int me_indexes[100], n_me_indexes;
	size_t ext_len, me_len;
	int i, top, bot, mid;
	int r;
	const char* default_type = "application/octet-stream ";
	const char* type;

	n_me_indexes = 0;
	for(prev_dot = &name[strlen(name)]; ; prev_dot = dot) {
		for(dot = prev_dot - 1; dot >= name && *dot != '.'; --dot);
		if(dot < name) {
			type = default_type;
			goto done;
		}
		ext = dot + 1;
		ext_len = prev_dot - ext;
		for(i = 0; i < n_enc_tab; ++i) {
			if(ext_len == enc_tab[i].ext_len && strncasecmp(ext, enc_tab[i].ext, ext_len) == 0) {
				if(n_me_indexes < sizeof(me_indexes)/sizeof(*me_indexes)) {
					me_indexes[n_me_indexes] = i;
					++n_me_indexes;
				}
				goto next;
			}
		}
		break;
		next: ;
	}
	top = n_typ_tab - 1;
	bot = 0;
	while(top >= bot) {
		mid = (top + bot) / 2;
		r = strncasecmp(ext, typ_tab[mid].ext, ext_len);
		if(r < 0) {
			top = mid - 1;
		} else if(r > 0) {
			bot = mid + 1;
		} else if(ext_len < typ_tab[mid].ext_len) {
			top = mid - 1;
		} else if(ext_len > typ_tab[mid].ext_len) {
			bot = mid + 1;
		} else {
			type = typ_tab[mid].val;
			goto done;
		}
	}
	type = default_type;
	done:
	me[0] = '\0';
	me_len = 0;
	for(i = n_me_indexes - 1; i >= 0; --i) {
		if(me_len + enc_tab[me_indexes[i]].val_len + 1 < me_size) {
			if(me[0] != '\0') {
				(void) strcpy(&me[me_len], ",");
				++me_len;
			}
			(void) strcpy(&me[me_len], enc_tab[me_indexes[i]].val);
			me_len += enc_tab[me_indexes[i]].val_len;
		}
	}
	return type;
}

static char* file_details(const char* dir, const char* name) {
	struct stat sb;
	char f_time[20];
	static char encname[1000];
	static char buf[2000];

	(void) snprintf(buf, sizeof(buf), "%s/%s", dir, name);
	if(lstat(buf, &sb) < 0)
	return "???";
	(void) strftime(f_time, sizeof(f_time), "%d-%b-%Y %H:%M", localtime(&sb.st_mtime));
	strencode(encname, sizeof(encname), name);
	(void) snprintf(buf, sizeof(buf), "<a href=\"%s\">%-50s</a>    %15s %14lld\n", encname, name, f_time, (long long int) sb.st_size);
	return buf;
}

static char* get_method_str(int m) {
	switch(m) {
		case METHOD_GET:
			return "GET";
		case METHOD_HEAD:
			return "HEAD";
		case METHOD_POST:
			return "POST";
		default:
			return "UNKNOWN";
	}
}

static int get_pathinfo(void) {
	int r;

	pathinfo = &file[strlen(file)];
	for(;;) {
		do {
			--pathinfo;
			if(pathinfo <= file) {
				pathinfo = (char*) 0;
				return -1;
			}
		} while(*pathinfo != '/');
		*pathinfo = '\0';
		r = stat(file, &sb);
		if(r >= 0) {
			++pathinfo;
			return r;
		} else {
			*pathinfo = '/';
		}
	}
}

static char* get_request_line(void) {
	int i;
	char c;

	for(i = request_idx; request_idx < request_len; ++request_idx) {
		c = request[request_idx];
		if(c == '\012' || c == '\015') {
			request[request_idx] = '\0';
			++request_idx;
			if(c == '\015' && request_idx < request_len && request[request_idx] == '\012') {
				request[request_idx] = '\0';
				++request_idx;
			}
			return &(request[i]);
		}
	}
	return (char*) 0;
}

static void handle_read_timeout(int sig, int is_ssl) {
	syslog(LOG_INFO, "%.80s connection timed out reading", ntoa(&client_addr));
	send_error(408, "Request Timeout", "", "No request appeared within a reasonable time period.", is_ssl);
}

static void handle_read_timeout_sig(int sig) {
	handle_read_timeout(0,0);
}

static void handle_request(int is_ssl, unsigned short conn_port) {
	char* method_str;
	char* line;
	char* cp;
	int r, file_len, i;
	const char* index_names[] = {"default.html", "default.htm", "index.html", "index.htm", "index.cgi", "index.sh" };

	(void) signal(SIGALRM, handle_read_timeout_sig);
	(void) alarm(READ_TIMEOUT);

	remoteuser = (char*) 0;
	method = METHOD_UNKNOWN;
	path = (char*) 0;
	file = (char*) 0;
	pathinfo = (char*) 0;
	query = "";
	protocol = (char*) 0;
	status = 0;
	bytes = -1;
	authorization = (char*) 0;
	content_type = (char*) 0;
	content_length = -1;
	cookie = (char*) 0;
	host = (char*) 0;
	if_modified_since = (time_t) -1;
	referer = "";
	useragent = "";

#ifdef TCP_NOPUSH
	r = 1;
	(void) setsockopt(conn_fd, IPPROTO_TCP, TCP_NOPUSH, (void*) &r, sizeof(r));
#endif
	if(is_ssl) {
		ssl = SSL_new(ssl_ctx);
		SSL_set_fd(ssl, conn_fd);
		int accept_ret = SSL_accept(ssl);
		if(accept_ret <= 0) {
			int e = SSL_get_error(ssl, accept_ret);
			if(e != VERSION_ERROR) {
				syslog(LOG_CRIT, "error: can't initialize ssl connection, error = %d\n", e);
			}
			exit(1);
		}
	}
	start_request();
	for(;;) {
		char buf[10000];
		int r = my_read( buf, sizeof(buf), is_ssl );
		if(r < 0 && (errno == EINTR || errno == EAGAIN)) {
			continue;
		}
		if(r <= 0) {
			break;
		}
		(void) alarm(READ_TIMEOUT);
		add_to_request(buf, r);
		if(strstr(request, "\015\012\015\012") != (char*) 0 || strstr(request, "\012\012") != (char*) 0) {
			break;
		}
	}
	method_str = get_request_line();
	if(method_str == (char*) 0) {
		send_error(400, "Bad Request", "", "Can't parse request.", is_ssl);
	}
	path = strpbrk(method_str, " \t\012\015");
	if(path == (char*) 0) {
		send_error(400, "Bad Request", "", "Can't parse request.", is_ssl);
	}
	*path++ = '\0';
	path += strspn(path, " \t\012\015");
	protocol = strpbrk(path, " \t\012\015");
	if(protocol == (char*) 0) {
		send_error(400, "Bad Request", "", "Can't parse request.", is_ssl);
	}
	*protocol++ = '\0';
	protocol += strspn(protocol, " \t\012\015");
	query = strchr(path, '?');
	if(query == (char*) 0) {
		query = "";
	} else {
		*query++ = '\0';
	}
	while((line = get_request_line()) != (char*) 0) {
		if(line[0] == '\0') {
			break;
		} else if(strncasecmp(line, "Authorization:", 14) == 0) {
			cp = &line[14];
			cp += strspn(cp, " \t");
			authorization = cp;
		} else if(strncasecmp(line, "Content-Length:", 15) == 0) {
			cp = &line[15];
			cp += strspn(cp, " \t");
			content_length = atol(cp);
		} else if(strncasecmp(line, "Content-Type:", 13) == 0) {
			cp = &line[13];
			cp += strspn(cp, " \t");
			content_type = cp;
		} else if(strncasecmp(line, "Cookie:", 7) == 0) {
			cp = &line[7];
			cp += strspn(cp, " \t");
			cookie = cp;
		} else if(strncasecmp(line, "Host:", 5) == 0) {
			cp = &line[5];
			cp += strspn(cp, " \t");
			host = cp;
			if(strchr(host, '/') != (char*) 0 || host[0] == '.') {
				send_error(400, "Bad Request", "", "Can't parse request.", is_ssl);
			}
		} else if(strncasecmp(line, "If-Modified-Since:", 18) == 0) {
			cp = &line[18];
			cp += strspn(cp, " \t");
			if_modified_since = dateparse(cp);
		} else if(strncasecmp(line, "Referer:", 8) == 0) {
			cp = &line[8];
			cp += strspn(cp, " \t");
			referer = cp;
		} else if(strncasecmp(line, "User-Agent:", 11) == 0) {
			cp = &line[11];
			cp += strspn(cp, " \t");
			useragent = cp;
		}
	}
	if(strcasecmp(method_str, get_method_str(METHOD_GET)) == 0) {
		method = METHOD_GET;
	} else if(strcasecmp(method_str, get_method_str(METHOD_HEAD)) == 0) {
		method = METHOD_HEAD;
	} else if(strcasecmp(method_str, get_method_str(METHOD_POST)) == 0) {
		method = METHOD_POST;
	} else {
		send_error(501, "Not Implemented", "", "That method is not implemented.", is_ssl);
	}
	strdecode(path, path);
	if(path[0] != '/') {
		send_error(400, "Bad Request", "", "Bad filename.", is_ssl);
	}
	file = &(path[1]);
	de_dotdot(file);
	if(file[0] == '\0') {
		file = "./";
	}
	if(file[0] == '/' || (file[0] == '.' && file[1] == '.' && (file[2] == '\0' || file[2] == '/'))) {
		send_error(400, "Bad Request", "", "Illegal filename.", is_ssl);
	}

	(void) signal(SIGALRM, handle_write_timeout);
	(void) alarm(WRITE_TIMEOUT);
	r = stat(file, &sb);
	if(r < 0) {
		r = get_pathinfo();
	}
	if(r < 0) {
		if(pageNotFoundFile != NULL && host != NULL) {
			send_redirect("", host, pageNotFoundFile, is_ssl);
		} else {
			send_error(404, "Not Found", "", "File not found.", is_ssl);
		}
	}
	file_len = strlen( file );
	if(!S_ISDIR(sb.st_mode)) {
		while(file[file_len - 1] == '/') {
			file[file_len - 1] = '\0';
			--file_len;
		}
		do_file(is_ssl, conn_port);
	} else {
		char idx[10000];
		unsigned char found_index = 0;
		if(file[file_len - 1] != '/' && pathinfo == (char*) 0) {
			char location[10000];
			if(query[0] != '\0') {
				(void) snprintf(location, sizeof(location), "Location: %s/?%s", path, query);
			} else {
				(void) snprintf(location, sizeof(location), "Location: %s/", path);
				send_error(302, "Found", location, "Directories must end with a slash.", is_ssl);
			}
		}
		if(defaultPageFile != NULL) {
			(void) snprintf(idx, sizeof(idx), "%s%s", file, defaultPageFile);
			if(stat( idx, &sb ) >= 0) {
				file = idx;
				do_file(is_ssl, conn_port);
				found_index = 1;
			}
		}
		for(i = 0; i < (sizeof(index_names) / sizeof(char*)) && found_index == 0; ++i) {
			(void) snprintf(idx, sizeof(idx), "%s%s", file, index_names[i]);
			if(stat(idx, &sb) >= 0) {
				file = idx;
				do_file(is_ssl, conn_port);
				found_index = 1;
			}
		}
		if(found_index == 0) {
			if(allowDirectoryListing == 0) {
				if(pageNotFoundFile != NULL && host != NULL) {
					send_redirect("", host, pageNotFoundFile, is_ssl);
				} else {
					send_error(404, "Not Found", "", "File not found.", is_ssl);
				}
			} else {
				do_dir(is_ssl);
			}
		}
	}
	if(is_ssl) {
		SSL_free(ssl);
	}
}

static void handle_sigchld(int sig) {
	const int oerrno = errno;
	pid_t pid;
	int status;

	(void) signal(SIGCHLD, handle_sigchld);
	for(;;) {
		pid = waitpid((pid_t) -1, &status, WNOHANG);
		if((int) pid == 0) {
			break;
		}
		if((int) pid < 0) {
			if(errno == EINTR || errno == EAGAIN) {
				continue;
			}
			if(errno != ECHILD) {
				syslog(LOG_ERR, "child wait - %m");
				perror("child wait");
			}
			break;
		}
	}
	errno = oerrno;
}

static void handle_sighup(int sig) {
	const int oerrno = errno;

	(void) signal(SIGHUP, handle_sighup);
	got_hup = 1;
	errno = oerrno;
}

static void handle_sigterm(int sig) {
	syslog(LOG_NOTICE, "exiting due to signal %d", sig);
	(void) fprintf(stderr, "%s: exiting due to signal %d\n", argv0, sig);
	closelog();
	exit(1);
}

static void handle_write_timeout(int sig) {
	syslog(LOG_INFO, "%.80s connection timed out writing", ntoa(&client_addr));
	exit(1);
}

static int hexit(char c) {
	if(c >= '0' && c <= '9') {
		return c - '0';
	}
	if(c >= 'a' && c <= 'f') {
		return c - 'a' + 10;
	}
	if(c >= 'A' && c <= 'F') {
		return c - 'A' + 10;
	}
	return 0;
}

static void init_mime(void) {
	int i;

	qsort(enc_tab, n_enc_tab, sizeof(*enc_tab), (int(*)(const void*, const void*)) ext_compare);
	qsort(typ_tab, n_typ_tab, sizeof(*typ_tab), (int(*)(const void*, const void*)) ext_compare);

	for(i = 0; i < n_enc_tab; ++i) {
		enc_tab[i].ext_len = strlen(enc_tab[i].ext);
		enc_tab[i].val_len = strlen(enc_tab[i].val);
	}
	for(i = 0; i < n_typ_tab; ++i) {
		typ_tab[i].ext_len = strlen(typ_tab[i].ext);
		typ_tab[i].val_len = strlen(typ_tab[i].val);
	}
}

static int initialize_listen_socket(usockaddr* usaP) {
	int listen_fd;
	int i;

	if(!sockaddr_check(usaP)) {
		syslog(LOG_ERR, "unknown sockaddr family on listen socket - %d", usaP->sa.sa_family);
		(void) fprintf(stderr, "%s: unknown sockaddr family on listen socket - %d\n", argv0, usaP->sa.sa_family);
		return -1;
	}
	listen_fd = socket(usaP->sa.sa_family, SOCK_STREAM, 0);
	if(listen_fd < 0) {
		if(usaP->sa.sa_family == AF_INET6 && (errno == ENOPROTOOPT || errno == EPROTONOSUPPORT || errno == ESOCKTNOSUPPORT || EPFNOSUPPORT || EAFNOSUPPORT)) {
			/* IPv6 not compiled into kernel, no big deal, don't print errors */
		} else {
			syslog(LOG_CRIT, "socket %.80s - %m", ntoa(usaP));
			perror("socket");
		}
		return -1;
	}

	(void) fcntl(listen_fd, F_SETFD, 1);
	i = 1;
	if(setsockopt(listen_fd, SOL_SOCKET, SO_REUSEADDR, (void*) &i, sizeof(i)) < 0) {
		syslog(LOG_CRIT, "setsockopt SO_REUSEADDR - %m");
		perror("setsockopt SO_REUSEADDR");
		return -1;
	}
	if(bind(listen_fd, &usaP->sa, sockaddr_len(usaP)) < 0) {
		syslog(LOG_CRIT, "bind %.80s - %m", ntoa(usaP));
		perror("bind");
		return -1;
	}
	if(listen(listen_fd, 1024) < 0) {
		syslog(LOG_CRIT, "listen - %m");
		perror("listen");
		return -1;
	}
	return listen_fd;
}

static void lookup_hostname(usockaddr* usa4P, usockaddr* usa4sP, size_t sa4_len, int* gotv4P, int* gotv4sP, usockaddr* usa6P, usockaddr* usa6sP, size_t sa6_len, int* gotv6P, int* gotv6sP) {
	int port_index;
	unsigned short port_list[4];
	port_list[0] = port;
	port_list[1] = sslPort;
	port_list[2] = 0;

	*gotv6P  = 0;
	*gotv6sP = 0;
	*gotv4P  = 0;
	*gotv4sP = 0;
	for(port_index=0; port_list[port_index] != 0; port_index++) {
		struct addrinfo hints;
		char portstr[10];
		int gaierr;
		struct addrinfo* ai;
		struct addrinfo* ai2;
		struct addrinfo* aiv6;
		struct addrinfo* aiv4;
		(void) memset(&hints, 0, sizeof(hints));
		hints.ai_family = PF_UNSPEC;
		hints.ai_flags = AI_PASSIVE;
		hints.ai_socktype = SOCK_STREAM;
		(void) snprintf(portstr, sizeof(portstr), "%d", (int) port_list[port_index]);
		if((gaierr = getaddrinfo(hostname, portstr, &hints, &ai)) != 0) {
			syslog(LOG_CRIT, "getaddrinfo %.80s - %s", hostname, gai_strerror(gaierr));
			(void) fprintf(stderr, "%s: getaddrinfo %.80s - %s\n", argv0, hostname, gai_strerror(gaierr));
			exit(1);
		}
		aiv6 = (struct addrinfo*) 0;
		aiv4 = (struct addrinfo*) 0;
		for(ai2 = ai; ai2 != (struct addrinfo*) 0; ai2 = ai2->ai_next) {
			switch(ai2->ai_family) {
				case AF_INET6:
					if(aiv6 == (struct addrinfo*) 0) {
						aiv6 = ai2;
					}
					break;
				case AF_INET:
					if(aiv4 == (struct addrinfo*) 0) {
						aiv4 = ai2;
					}
					break;
			}
		}
		if(aiv6 != (struct addrinfo*) 0) {
			if(sa6_len < aiv6->ai_addrlen) {
				syslog(LOG_CRIT, "%.80s - sockaddr too small (%lu < %lu)", hostname, (unsigned long) sa6_len, (unsigned long) aiv6->ai_addrlen);
				(void) fprintf(stderr, "%s: %.80s - sockaddr too small (%lu < %lu)\n", argv0, hostname, (unsigned long) sa6_len, (unsigned long) aiv6->ai_addrlen);
				exit(1);
			}
			if(port_index==0) {
				*gotv6P = 1;
				(void) memset(usa6P, 0, sa6_len);
				(void) memmove(usa6P, aiv6->ai_addr, aiv6->ai_addrlen);
			} else {
				*gotv6sP = 1;
				(void) memset(usa6sP, 0, sa6_len);
				(void) memmove(usa6sP, aiv6->ai_addr, aiv6->ai_addrlen);
			}
		}
		if(aiv4 != (struct addrinfo*) 0) {
			if(sa4_len < aiv4->ai_addrlen) {
				syslog(LOG_CRIT, "%.80s - sockaddr too small (%lu < %lu)", hostname, (unsigned long) sa4_len, (unsigned long) aiv4->ai_addrlen);
				(void) fprintf(stderr, "%s: %.80s - sockaddr too small (%lu < %lu)\n", argv0, hostname, (unsigned long) sa4_len, (unsigned long) aiv4->ai_addrlen);
				exit(1);
			}
			if(port_index == 0) {
				*gotv4P = 1;
				(void) memset(usa4P, 0, sa4_len);
				(void) memmove(usa4P, aiv4->ai_addr, aiv4->ai_addrlen);
			} else {
				*gotv4sP = 1;
				(void) memset(usa4sP, 0, sa4_len);
				(void) memmove(usa4sP, aiv4->ai_addr, aiv4->ai_addrlen);
			}
			*gotv4P = 1;
		}
		freeaddrinfo(ai);
	}
}

int main(int argc, char** argv) {
	int argn;
	struct passwd* pwd;
	uid_t uid = 32767;
	gid_t gid = 32767;
	usockaddr host_addr4;
	usockaddr host_addr6;
	int gotv4, gotv4s, gotv6, gotv6s;
	fd_set lfdset;
	int maxfd;
	usockaddr usa;
	int sz, r;
	char* cp;
	usockaddr host_addr4s;
	usockaddr host_addr6s;

	argv0 = argv[0];
	debug = 0;
	port = 0;
	dir = (char*) 0;
	data_dir = (char*) 0;
	cgi_pattern = DEFAULT_CGI_PATTERN;
	url_pattern = (char*) 0;
	no_empty_referers = 0;
	local_pattern = (char*) 0;
	charset = DEFAULT_CHARSET;
	language = DEFAULT_LANGUAGE;
	p3p = (char*) 0;
	max_age = -1;
	user = DEFAULT_USER;
	hostname = (char*) 0;
	logfile = (char*) 0;
	pidfile = (char*) 0;
	logfp = (FILE*) 0;
	do_ssl = 0;
	certfile = DEFAULT_CERTFILE;
	cipher = (char*) 0;

	defaultRealmName = NULL;
	defaultRealmPasswordFile = NULL;
	defaultPageFile = NULL;
	pageNotFoundFile = NULL;
	allowDirectoryListing = 1;
	sslPort = 0;
	argn = 1;

	while(argn < argc && argv[argn][0] == '-') {
		if(strcmp( argv[argn], "-V" ) == 0) {
			(void) printf("%s\n", SERVER_SOFTWARE);
			exit(0);
		} else if(strcmp(argv[argn], "-C") == 0 && argn + 1 < argc) {
			++argn;
			read_config(argv[argn]);
		} else if(strcmp(argv[argn], "-D") == 0) {
			debug = 1;
		} else if(strcmp(argv[argn], "-S") == 0) {
			do_ssl = 1;
		} else if(strcmp(argv[argn], "-E") == 0 && argn + 1 < argc) {
			++argn;
			certfile = argv[argn];
		} else if(strcmp(argv[argn], "-Y") == 0 && argn + 1 < argc) {
			++argn;
			cipher = argv[argn];
		} else if(strcmp(argv[argn], "-p") == 0 && argn + 1 < argc) {
			++argn;
			port = (unsigned short) atoi(argv[argn]);
		} else if(strcmp(argv[argn], "-d") == 0 && argn + 1 < argc) {
			++argn;
			dir = argv[argn];
		} else if(strcmp(argv[argn], "-dd") == 0 && argn + 1 < argc) {
			++argn;
			data_dir = argv[argn];
		} else if(strcmp(argv[argn], "-c") == 0 && argn + 1 < argc) {
			++argn;
			cgi_pattern = argv[argn];
		} else if(strcmp(argv[argn], "-u") == 0 && argn + 1 < argc) {
			++argn;
			user = argv[argn];
		} else if(strcmp(argv[argn], "-h") == 0 && argn + 1 < argc) {
			++argn;
			hostname = argv[argn];
		} else if(strcmp(argv[argn], "-l") == 0 && argn + 1 < argc) {
			++argn;
			logfile = argv[argn];
		} else if(strcmp(argv[argn], "-i") == 0 && argn + 1 < argc) {
			++argn;
			pidfile = argv[argn];
		} else if(strcmp(argv[argn], "-T") == 0 && argn + 1 < argc) {
			++argn;
			charset = argv[argn];
		} else if(strcmp(argv[argn], "-L") == 0 && argn + 1 < argc) {
			++argn;
			language = argv[argn];
		} else if(strcmp(argv[argn], "-P") == 0 && argn + 1 < argc) {
			++argn;
			p3p = argv[argn];
		} else if(strcmp(argv[argn], "-M") == 0 && argn + 1 < argc) {
			++argn;
			max_age = atoi(argv[argn]);
		} else if(strcmp(argv[argn], "-DRN") == 0 && argn + 1 < argc) {
			++argn;
			defaultRealmName = argv[argn];
		} else if(strcmp(argv[argn], "-DRP") == 0 && argn + 1 < argc) {
			++argn;
			defaultRealmPasswordFile = argv[argn];
		} else if(strcmp(argv[argn], "-DPF") == 0 && argn + 1 < argc) {
			++argn;
			defaultPageFile = argv[argn];
		} else if(strcmp(argv[argn], "-PNF") == 0 && argn + 1 < argc) {
			++argn;
			pageNotFoundFile = argv[argn];
		} else if(strcmp(argv[argn], "-ADL") == 0 && argn + 1 < argc) {
			++argn;
			if(strcmp(argv[argn], "1") == 0 || strcmp(argv[argn], "true") == 0 || strcmp(argv[argn], "TRUE") == 0 || strcmp(argv[argn], "yes") == 0 || strcmp(argv[argn], "YES") == 0) {
				allowDirectoryListing = 1;
			} else {
				allowDirectoryListing = 0;
			}
		} else if(strcmp(argv[argn], "-SP") == 0 && argn + 1 < argc) {
			++argn;
			sslPort = (unsigned short) atoi(argv[argn]);
		} else {
			usage();
		}
		++argn;
	}
	if(argn != argc) {
		usage();
	}

	cp = strrchr(argv0, '/');
	if(cp != (char*) 0) {
		++cp;
	} else {
		cp = argv0;
	}
	openlog(cp, LOG_NDELAY|LOG_PID, LOG_DAEMON);

	if(port == 0) {
		if(sslPort != 0 && do_ssl) {
			port = sslPort;
			sslPort = 0;
		}
		if(do_ssl) {
			port = DEFAULT_HTTPS_PORT;
		} else {
			port = DEFAULT_HTTP_PORT;
		}
	}

	if(getuid() == 0) {
		pwd = getpwnam(user);
		if(pwd == (struct passwd*) 0) {
			syslog(LOG_CRIT, "unknown user - '%s'", user);
			(void) fprintf(stderr, "%s: unknown user - '%s'\n", argv0, user);
			exit(1);
		}
		uid = pwd->pw_uid;
		gid = pwd->pw_gid;
	}

	if(logfile != (char*) 0) {
		logfp = fopen(logfile, "a");
		if(logfp == (FILE*) 0) {
			syslog(LOG_CRIT, "%s - %m", logfile);
			perror(logfile);
			exit(1);
		}
		if(logfile[0] != '/') {
			syslog(LOG_WARNING, "logfile is not an absolute path, you may not be able to re-open it");
			(void) fprintf(stderr, "%s: logfile is not an absolute path, you may not be able to re-open it\n", argv0);
		}
		if(getuid() == 0) {
			if(fchown(fileno(logfp), uid, gid) < 0) {
				syslog(LOG_WARNING, "fchown logfile - %m");
				perror("fchown logfile");
			}
		}
	}

    lookup_hostname(&host_addr4, &host_addr4s, sizeof(struct sockaddr_in),  &gotv4, &gotv4s, &host_addr6, &host_addr6s, sizeof(struct sockaddr_in6), &gotv6, &gotv6s);
    if(hostname == (char*) 0) {
		(void) gethostname(hostname_buf, sizeof(hostname_buf));
		hostname = hostname_buf;
	}
	if(!( gotv4 || gotv4s || gotv6 || gotv6s)) {
		syslog(LOG_CRIT, "can't find any valid address");
		(void) fprintf(stderr, "%s: can't find any valid address\n", argv0);
		exit(1);
	}

    listen6_fd  = -1;
    listen6s_fd = -1;
    listen4_fd  = -1;
    listen4s_fd = -1;
    if(gotv6) {
		listen6_fd = initialize_listen_socket(&host_addr6);
	}
	if(gotv6s) {
		listen6s_fd = initialize_listen_socket(&host_addr6s);
	}
	if(gotv4) {
		listen4_fd = initialize_listen_socket(&host_addr4);
	}
	if(gotv4s) {
		listen4s_fd = initialize_listen_socket(&host_addr4s);
	}

    if(listen4_fd == -1 && listen6_fd == -1 && listen4s_fd == -1 && listen6s_fd == -1) {
		syslog(LOG_CRIT, "can't bind to any address");
		(void) fprintf(stderr, "%s: can't bind to any address\n", argv0);
		exit(1);
	}

	if(do_ssl) {
		ssl_ctx = SSL_CTX_new(TLSv1_server_method());
		SSL_CTX_set_verify(ssl_ctx, SSL_VERIFY_NONE, 0);
		if(certfile[0] != '\0') {
			if(SSL_CTX_use_certificate_file(ssl_ctx, certfile, SSL_FILETYPE_PEM) != SSL_SUCCESS || SSL_CTX_use_PrivateKey_file(ssl_ctx, certfile, SSL_FILETYPE_PEM) != SSL_SUCCESS) {
				syslog(LOG_CRIT, "can't load certificate and/or private key\n");
				exit(1);
			}
		}
		if(cipher != (char*) 0) {
			if(SSL_CTX_set_cipher_list(ssl_ctx, cipher) <= 0) {
				syslog(LOG_CRIT, "can't load certificate and/or private key\n");
				exit(1);
			}
		}
	}

	if(!debug) {
		if(daemon(1, 0) < 0) {
			syslog(LOG_CRIT, "daemon - %m");
			perror("daemon");
			exit(1);
		}
	} else {
		(void) setsid();
	}

	if(pidfile != (char*) 0) {
		FILE* pidfp = fopen(pidfile, "w");
		if(pidfp == (FILE*) 0) {
			syslog(LOG_CRIT, "%s - %m", pidfile);
			perror(pidfile);
			exit(1);
		}
		(void) fprintf(pidfp, "%d\n", (int) getpid());
		(void) fclose(pidfp);
	}

	tzset();

	if(getuid() == 0) {
		if(setgroups(0, (gid_t*) 0) < 0) {
			syslog(LOG_CRIT, "setgroups - %m");
			perror("setgroups");
			exit(1);
		}
		if(setgid(gid) < 0) {
			syslog(LOG_CRIT, "setgid - %m");
			perror("setgid");
			exit(1);
		}
		if(initgroups(user, gid ) < 0) {
			syslog(LOG_ERR, "initgroups - %m");
			perror("initgroups");
		}
	}

	if(dir != (char*) 0) {
		if(chdir(dir) < 0) {
			syslog(LOG_CRIT, "chdir - %m");
			perror("chdir");
			exit(1);
		}
	}
	if(getcwd(cwd, sizeof(cwd) - 1) == NULL) { ; }
	if(cwd[strlen(cwd) - 1] != '/') {
		(void) strcat( cwd, "/" );
	}
	if(data_dir != (char*) 0) {
		if(chdir(data_dir) < 0) {
			syslog(LOG_CRIT, "data_dir chdir - %m");
			perror("data_dir chdir");
			exit(1);
		}
	}
	if(getuid() == 0) {
		if(setuid(uid) < 0) {
			syslog(LOG_CRIT, "setuid - %m");
			perror("setuid");
			exit(1);
		}
	}

	(void) signal(SIGTERM, handle_sigterm);
	(void) signal(SIGINT, handle_sigterm);
	(void) signal(SIGUSR1, handle_sigterm);
	(void) signal(SIGHUP, handle_sighup);
	(void) signal(SIGCHLD, handle_sigchld);
	(void) signal(SIGPIPE, SIG_IGN);
	got_hup = 0;
	init_mime();

	if(hostname == (char*) 0) {
		syslog(LOG_NOTICE, "%.80s starting on port %d", SERVER_SOFTWARE, (int) port);
	} else {
		syslog(LOG_NOTICE, "%.80s starting on %.80s, port %d", SERVER_SOFTWARE, hostname, (int) port);
	}

	for(;;) {
		int is_ssl;
		unsigned short conn_port;
		if(got_hup) {
			reopen_logfile();
			got_hup = 0;
		}
		FD_ZERO(&lfdset);
		maxfd = -1;
		if(listen4_fd != -1) {
			FD_SET(listen4_fd, &lfdset);
			if(listen4_fd > maxfd) {
				maxfd = listen4_fd;
			}
		}
		if(listen4s_fd != -1) {
			FD_SET(listen4s_fd, &lfdset);
			if(listen4s_fd > maxfd) {
				maxfd = listen4s_fd;
			}
		}
		if(listen6_fd != -1) {
			FD_SET(listen6_fd, &lfdset);
			if(listen6_fd > maxfd) {
				maxfd = listen6_fd;
			}
		}
		if(listen6s_fd != -1) {
			FD_SET(listen6s_fd, &lfdset);
			if(listen6s_fd > maxfd) {
				maxfd = listen6s_fd;
			}
		}
		if(select(maxfd + 1, &lfdset, (fd_set*) 0, (fd_set*) 0, (struct timeval*) 0) < 0) {
			if(errno == EINTR || errno == EAGAIN) {
				continue;
			}
			syslog(LOG_CRIT, "select - %m");
			perror("select");
			exit(1);
		}
		is_ssl= 0;
		conn_port = port;
		if(do_ssl) {
			if(sslPort == 0) {
				is_ssl= 1;
			} else if(listen4s_fd != -1 && FD_ISSET(listen4s_fd, &lfdset)) {
				is_ssl = 1;
				conn_port = sslPort;
			} else if(listen6s_fd != -1 && FD_ISSET(listen6s_fd, &lfdset)) {
				is_ssl = 1;
				conn_port = sslPort;
			}
		}
		sz = sizeof(usa);
		if(listen4_fd != -1 && FD_ISSET(listen4_fd, &lfdset)) {
			conn_fd = accept(listen4_fd, &usa.sa, &sz);
		} else if(listen4s_fd != -1 && FD_ISSET(listen4s_fd, &lfdset)) {
			conn_fd = accept(listen4s_fd, &usa.sa, &sz);
		} else if(listen6_fd != -1 && FD_ISSET(listen6_fd, &lfdset)) {
			conn_fd = accept(listen6_fd, &usa.sa, &sz);
		} else if(listen6s_fd != -1 && FD_ISSET(listen6s_fd, &lfdset)) {
			conn_fd = accept(listen6s_fd, &usa.sa, &sz);
		} else {
			syslog(LOG_CRIT, "select failure");
			(void) fprintf(stderr, "%s: select failure\n", argv0);
			exit(1);
		}
		if(conn_fd < 0) {
			if(errno == EINTR || errno == EAGAIN) {
				continue;
			}
#ifdef EPROTO
			if(errno == EPROTO) {
				continue;
			}
#endif
			syslog(LOG_CRIT, "accept - %m");
			perror("accept");
			exit(1);
		}
		r = fork();
		if(r < 0) {
			syslog(LOG_CRIT, "fork - %m");
			perror("fork");
			exit(1);
		}
		if(r == 0) {
			client_addr = usa;
			if(listen4_fd != -1)  {
				(void) close(listen4_fd);
			}
			if(listen4s_fd != -1) {
				(void) close(listen4s_fd);
			}
			if(listen6_fd != -1) {
				(void) close(listen6_fd);
			}
			if(listen6s_fd != -1) {
				(void) close(listen6s_fd);
			}
			handle_request(is_ssl, conn_port);
			exit(0);
		}
		(void) close(conn_fd);
	}
}

static char** make_argp(void) {
	char** argp;
	int argn;
	char* cp1;
	char* cp2;

	argp = (char**) malloc((strlen(query) + 2) * sizeof(char*));
	if(argp == (char**) 0) {
		return (char**) 0;
	}
	argp[0] = strrchr(file, '/');
	if(argp[0] != (char*) 0) {
		++argp[0];
	} else {
		argp[0] = file;
	}
	argn = 1;
	if(strchr(query, '=') == (char*) 0) {
		for(cp1 = cp2 = query; *cp2 != '\0'; ++cp2) {
			if(*cp2 == '+') {
				*cp2 = '\0';
				strdecode(cp1, cp1);
				argp[argn++] = cp1;
				cp1 = cp2 + 1;
			}
		}
		if(cp2 != cp1) {
			strdecode(cp1, cp1);
			argp[argn++] = cp1;
		}
	}
	argp[argn] = (char*) 0;
	return argp;
}

static char** make_envp(int is_ssl, unsigned short conn_port) {
	static char* envp[50];
	int envn;
	char* cp;
	char buf[256];

	envn = 0;
	envp[envn++] = build_env("PATH=%s", CGI_PATH);
	envp[envn++] = build_env("LD_LIBRARY_PATH=%s", CGI_LD_LIBRARY_PATH);
	envp[envn++] = build_env("SERVER_SOFTWARE=%s", SERVER_SOFTWARE);
	envp[envn++] = build_env("WWW_LANGUAGE=%s", language);
	cp = hostname;
	if(cp != (char*) 0) {
		envp[envn++] = build_env("SERVER_NAME=%s", cp);
	}
	envp[envn++] = "GATEWAY_INTERFACE=CGI/1.1";
	envp[envn++] = "SERVER_PROTOCOL=HTTP/1.0";
	(void) snprintf(buf, sizeof(buf), "%d", (int) conn_port);
	envp[envn++] = build_env("SERVER_PORT=%s", buf);
	envp[envn++] = build_env("REQUEST_METHOD=%s", get_method_str(method));
	envp[envn++] = build_env("SCRIPT_NAME=%s", path);
	if(pathinfo != (char*) 0) {
		envp[envn++] = build_env("PATH_INFO=/%s", pathinfo);
		(void) snprintf(buf, sizeof(buf), "%s%s", cwd, pathinfo);
		envp[envn++] = build_env("PATH_TRANSLATED=%s", buf);
	}
	if(query[0] != '\0') {
		envp[envn++] = build_env("QUERY_STRING=%s", query);
	}
	envp[envn++] = build_env("REMOTE_ADDR=%s", ntoa(&client_addr));
	if(referer[0] != '\0') {
		envp[envn++] = build_env("HTTP_REFERER=%s", referer);
	}
	if(useragent[0] != '\0') {
		envp[envn++] = build_env("HTTP_USER_AGENT=%s", useragent);
	}
	if(cookie != (char*) 0) {
		envp[envn++] = build_env("HTTP_COOKIE=%s", cookie);
	}
	if(host != (char*) 0) {
		envp[envn++] = build_env("HTTP_HOST=%s", host);
	}
	if(content_type != (char*) 0) {
		envp[envn++] = build_env("CONTENT_TYPE=%s", content_type);
	}
	if(content_length != -1) {
		(void) snprintf(buf, sizeof(buf), "%lu", (unsigned long) content_length);
		envp[envn++] = build_env("CONTENT_LENGTH=%s", buf);
	}
	if(remoteuser != (char*) 0) {
		envp[envn++] = build_env("REMOTE_USER=%s", remoteuser);
	}
	if(authorization != (char*) 0) {
		envp[envn++] = build_env("AUTH_TYPE=%s", "Basic");
	}
	if(getenv("TZ") != (char*) 0) {
		envp[envn++] = build_env("TZ=%s", getenv("TZ"));
	}
	envp[envn] = (char*) 0;
	return envp;
}

static void make_log_entry(void) {
	char* ru;
	char url[500];
	char bytes_str[40];
	time_t now;
	struct tm* t;
	const char* cernfmt_nozone = "%d/%b/%Y:%H:%M:%S";
	char date_nozone[100];
	int zone;
	char sign;
	char date[100];

	if(logfp == (FILE*) 0) {
		return;
	}
	if(protocol == (char*) 0) {
		protocol = "UNKNOWN";
	}
	if(path == (char*) 0) {
		path = "";
	}
	if(remoteuser != (char*) 0) {
		ru = remoteuser;
	} else {
		ru = "-";
	}
	now = time((time_t*) 0);
	(void) snprintf(url, sizeof(url), "%s", path);
	if(bytes >= 0) {
		(void) snprintf(bytes_str, sizeof(bytes_str), "%lld", (long long int) bytes );
	} else {
		(void) strcpy(bytes_str, "-");
	}
	t = localtime(&now);
	(void) strftime(date_nozone, sizeof(date_nozone), cernfmt_nozone, t);
	zone = t->tm_gmtoff / 60L;
	if(zone >= 0) {
		sign = '+';
	} else {
		sign = '-';
		zone = -zone;
	}
	zone = (zone / 60) * 100 + zone % 60;
	(void) snprintf(date, sizeof(date), "%s %c%04d", date_nozone, sign, zone);
	(void) fprintf(logfp, "%.80s - %.80s [%s] \"%.80s %.200s %.80s\" %d %s \"%.200s\" \"%.200s\"\n", ntoa(&client_addr), ru, date, get_method_str(method), url, protocol, status, bytes_str, referer, useragent);
	(void) fflush(logfp);
}

static ssize_t my_read(char* buf, size_t size, int is_ssl) {
	if(is_ssl) {
		return SSL_read(ssl, buf, size);
	} else {
		return read(conn_fd, buf, size);
	}
}

static ssize_t my_write(char* buf, size_t size, int is_ssl) {
	if(is_ssl) {
		return SSL_write(ssl, buf, size);
	} else {
		return write(conn_fd, buf, size);
	}
}

static void no_value_required(char* name, char* value) {
	if(value != (char*) 0) {
		(void) fprintf(stderr, "%s: no value required for %s option\n", argv0, name);
		exit(1);
	}
}

static char* ntoa(usockaddr* usaP) {
	static char str[200];

	if(getnameinfo(&usaP->sa, sockaddr_len(usaP), str, sizeof(str), 0, 0, NI_NUMERICHOST) != 0) {
		str[0] = '?';
		str[1] = '\0';
	} else if(IN6_IS_ADDR_V4MAPPED(&usaP->sa_in6.sin6_addr) && strncmp(str, "::ffff:", 7) == 0) {
		(void) strcpy(str, &str[7]);
	}
	return str;
}

static void post_post_garbage_hack(int is_ssl) {
	char buf[2];

	if(is_ssl) {
		return;
	}
	set_ndelay(conn_fd);
	if(read(conn_fd, buf, sizeof(buf)) < 0) { ; };
	clear_ndelay(conn_fd);
}

static void read_config(char* filename) {
	FILE* fp;
	char line[10000];
	char* cp;
	char* cp2;
	char* name;
	char* value;

	fp = fopen(filename, "r");
	if(fp == (FILE*) 0) {
		syslog(LOG_CRIT, "%s - %m", filename);
		perror(filename);
		exit(1);
	}
	while(fgets(line, sizeof(line), fp) != (char*) 0) {
		if((cp = strchr(line, '#')) != (char*) 0) {
			*cp = '\0';
		}
		cp = line;
		cp += strspn(cp, " \t\012\015");
		while(*cp != '\0') {
			cp2 = cp + strcspn(cp, " \t\012\015");
			while(*cp2 == ' ' || *cp2 == '\t' || *cp2 == '\012' || *cp2 == '\015') {
				*cp2++ = '\0';
			}
			name = cp;
			value = strchr(name, '=');
			if(value != (char*) 0) {
				*value++ = '\0';
			}
			if(strcasecmp(name, "debug") == 0) {
				no_value_required(name, value);
				debug = 1;
			} else if(strcasecmp(name, "port") == 0) {
				value_required(name, value);
				port = (unsigned short) atoi(value);
			} else if(strcasecmp(name, "dir") == 0) {
				value_required(name, value);
				dir = e_strdup(value);
			} else if(strcasecmp(name, "data_dir") == 0) {
				value_required(name, value);
				data_dir = e_strdup(value);
			} else if(strcasecmp(name, "user") == 0) {
				value_required(name, value);
				user = e_strdup(value);
			} else if(strcasecmp(name, "cgipat") == 0) {
				value_required(name, value);
				cgi_pattern = e_strdup(value);
			} else if(strcasecmp(name, "urlpat") == 0) {
				value_required(name, value);
				url_pattern = e_strdup(value);
			} else if(strcasecmp(name, "noemptyreferers") == 0) {
				value_required(name, value);
				no_empty_referers = 1;
			} else if(strcasecmp(name, "localpat") == 0) {
				value_required(name, value);
				local_pattern = e_strdup(value);
			} else if(strcasecmp(name, "host") == 0) {
				value_required(name, value);
				hostname = e_strdup(value);
			} else if(strcasecmp(name, "logfile") == 0) {
				value_required(name, value);
				logfile = e_strdup(value);
			} else if(strcasecmp(name, "pidfile") == 0) {
				value_required(name, value);
				pidfile = e_strdup(value);
			} else if(strcasecmp(name, "charset") == 0) {
				value_required(name, value);
				charset = e_strdup(value);
			} else if(strcasecmp(name, "p3p") == 0) {
				value_required(name, value);
				p3p = e_strdup(value);
			} else if(strcasecmp(name, "max_age") == 0) {
				value_required(name, value);
				max_age = atoi(value);
			} else if(strcasecmp(name, "default_realm_name") == 0) {
				value_required(name, value);
				defaultRealmName = e_strdup(value);
			} else if(strcasecmp(name, "default_realm_password_file") == 0) {
				value_required(name, value);
				defaultRealmPasswordFile = e_strdup(value);
			} else if(strcasecmp(name, "default_page_file") == 0) {
				value_required(name, value);
				defaultPageFile = e_strdup(value);
			} else if(strcasecmp(name, "page_not_found_file") == 0) {
				value_required(name, value);
				pageNotFoundFile = e_strdup(value);
			} else if(strcasecmp(name, "allow_directory_listing") == 0) {
				value_required(name, value);
				if(strcmp(value, "1") == 0 || strcmp(value, "true") == 0 || strcmp(value, "TRUE") == 0 || strcmp(value, "yes") == 0 || strcmp(value, "YES") == 0) {
					allowDirectoryListing = 1;
				} else {
					allowDirectoryListing = 0;
				}
			} else if(strcasecmp(name, "ssl") == 0) {
				no_value_required(name, value);
				do_ssl = 1;
			} else if(strcasecmp(name, "certfile") == 0) {
				value_required(name, value);
				certfile = e_strdup(value);
			} else if(strcasecmp(name, "cipher") == 0) {
				value_required(name, value);
				cipher = e_strdup(value);
			} else {
				(void) fprintf(stderr, "%s: unknown config option '%s'\n", argv0, name);
				exit(1);
			}
			cp = cp2;
			cp += strspn(cp, " \t\012\015");
		}
	}
	(void) fclose(fp);
}

static int really_check_referer(void) {
	char* cp1;
	char* cp2;
	char* cp3;
	char* refhost;
	char *lp;

	if(referer == (char*) 0 || referer[0] == '\0' || (cp1 = strstr(referer, "//")) == (char*) 0) {
		if(no_empty_referers && match(url_pattern, path)) {
			return 0;
		} else {
			return 1;
		}
	}
	cp1 += 2;
	for(cp2 = cp1; *cp2 != '/' && *cp2 != ':' && *cp2 != '\0'; ++cp2) {
		continue;
	}
	refhost = (char*) e_malloc(cp2 - cp1 + 1);
	for(cp3 = refhost; cp1 < cp2; ++cp1, ++cp3) {
		if(isupper(*cp1)) {
			*cp3 = tolower(*cp1);
		} else {
			*cp3 = *cp1;
		}
	}
	*cp3 = '\0';
	if(local_pattern != (char*) 0) {
		lp = local_pattern;
	} else {
		lp = hostname;
		if(lp == (char*) 0) {
			return 1;
		}
	}
	if(!match(lp, refhost) && match(url_pattern, path)) {
		return 0;
	} else {
		return 1;
	}
}

static void reopen_logfile(void) {
	if(logfp != (FILE*) 0) {
		(void) fclose(logfp);
		logfp = (FILE*) 0;
	}
	if(logfile != (char*) 0) {
		syslog(LOG_NOTICE, "re-opening logfile");
		logfp = fopen(logfile, "a");
		if(logfp == (FILE*) 0) {
			syslog(LOG_CRIT, "%s - %m", logfile);
			perror(logfile);
			exit(1);
		}
	}
}

static void send_authenticate(char* realm, int is_ssl) {
	char header[10000];

	(void) snprintf(header, sizeof(header), "WWW-Authenticate: Basic realm=\"%s\"", realm);
	send_error(401, "Unauthorized", header, "Authorization required.", is_ssl);
}

static void send_error(int s, char* title, char* extra_header, char* text, int is_ssl) {
	add_headers(s, title, extra_header, "", "text/html; charset=%s", (off_t) -1, (time_t) -1);
	send_error_body(s, title, text);
	send_error_tail();
	send_response(is_ssl);
	SSL_free(ssl);
	exit(1);
}

static void send_error_body(int s, char* title, char* text) {
	char filename[1000];
	char buf[10000];
	int buflen;

	(void) snprintf(filename, sizeof(filename), "%s/err%d.html", ERR_DIR, s);
	if(send_error_file(filename)) {
		return;
	}
	buflen = snprintf(buf, sizeof(buf), "<html>\n<head><title>Error %d - %s</title></head>\n<body bgcolor=\"#cc9999\" text=\"#000000\">\n<h2>Error %d</h2>\n", s, title, s);
	add_to_response(buf, buflen);
	buflen = snprintf(buf, sizeof(buf), "%s\n", text);
	add_to_response(buf, buflen);
}

static int send_error_file(char* filename) {
	FILE* fp;
	char buf[1000];
	size_t r;

	fp = fopen(filename, "r");
	if(fp == (FILE*) 0) {
		return 0;
	}
	for(;;) {
		r = fread(buf, 1, sizeof(buf), fp);
		if(r == 0) {
			break;
		}
		add_to_response(buf, r);
	}
	(void) fclose(fp);
	return 1;
}

static void send_error_tail(void) {
	char buf[500];
	int buflen;

	if(match("**MSIE**", useragent)) {
		int n;
		buflen = snprintf(buf, sizeof(buf), "<!--\n");
		add_to_response(buf, buflen);
		for(n = 0; n < 6; ++n) {
			buflen = snprintf(buf, sizeof(buf), "Padding so that MSIE deigns to show this error instead of its own canned one.\n");
			add_to_response(buf, buflen);
		}
		buflen = snprintf(buf, sizeof(buf), "-->\n");
		add_to_response(buf, buflen);
	}
	buflen = snprintf(buf, sizeof(buf), "<hr>\n%s\n</body>\n</html>\n", SERVER_SOFTWARE);
	add_to_response(buf, buflen);
}

static void send_redirect(char* extra_header, char* hostname, char* new_location, int is_ssl) {
	int extra_length = 0;
	char extra_header_buf[5000];
	const char *sep = new_location[0] == '/' ? "" : "/";
	const char *proto = is_ssl == 1 ? "https://" : "http://";

	extra_header = extra_header == NULL ? "" : extra_header;
	if(strcmp(extra_header, "") == 0) {
		sprintf(extra_header_buf, "Location: %s%s%s%s", proto, hostname, sep, new_location);
	} else {
		sprintf(extra_header_buf, "%s\r\nLocation: %s%s%s%s", extra_header, proto, hostname, sep, new_location);
	}
	add_headers(301, "Moved Permanently", extra_header_buf, "", "text/html; charset=%s", (off_t) -1, (time_t) -1);
	send_error_body(301, "Moved Permanently", "Moved Permanently");
	send_error_tail();
	send_response(is_ssl);
	SSL_free(ssl);
	exit(1);
}

static void send_response(is_ssl) {
	(void) my_write(response, response_len, is_ssl);
}

static void send_via_write(int fd, off_t size, int is_ssl) {
	if(size <= SIZE_T_MAX) {
		size_t size_size = (size_t) size;
		void* ptr = mmap(0, size_size, PROT_READ, MAP_PRIVATE, fd, 0);
		if(ptr != (void*) -1) {
			(void) my_write(ptr, size_size, is_ssl);
			(void) munmap(ptr, size_size);
		}
#ifdef MADV_SEQUENTIAL
		(void) madvise(ptr, size_size, MADV_SEQUENTIAL);
#endif
	} else {
		char buf[30000];
		ssize_t r, r2;
		for(;;) {
			r = read(fd, buf, sizeof(buf));
			if(r < 0 && (errno == EINTR || errno == EAGAIN)) {
				sleep(1);
				continue;
			}
			if(r <= 0) {
				return;
			}
			for(;;) {
				r2 = my_write(buf, r, is_ssl);
				if(r2 < 0 && (errno == EINTR || errno == EAGAIN)) {
					sleep(1);
					continue;
				}
				if(r2 != r) {
					return;
				}
				break;
			}
		}
	}
}

static void set_ndelay(int fd) {
	int flags, newflags;

	flags = fcntl(fd, F_GETFL, 0);
	if(flags != -1) {
		newflags = flags | (int) O_NDELAY;
		if(newflags != flags) {
			(void) fcntl(fd, F_SETFL, newflags);
		}
	}
}

static int sockaddr_check(usockaddr* usaP) {
	switch (usaP->sa.sa_family) {
		case AF_INET:
			return 1;
		case AF_INET6:
			return 1;
		default:
			return 0;
	}
}

static size_t sockaddr_len(usockaddr* usaP) {
	switch(usaP->sa.sa_family) {
		case AF_INET:
			return sizeof(struct sockaddr_in);
		case AF_INET6:
			return sizeof(struct sockaddr_in6);
		default:
			return 0;
	}
}

static void start_request(void) {
	request_size = 0;
	request_idx = 0;
}

static void start_response(void) {
	response_size = 0;
}

static void strdecode(char* to, char* from) {
	for(; *from != '\0'; ++to, ++from) {
		if(from[0] == '%' && isxdigit(from[1]) && isxdigit(from[2])) {
			*to = hexit(from[1]) * 16 + hexit(from[2]);
			from += 2;
		} else {
			*to = *from;
		}
	}
	*to = '\0';
}

static void strencode(char* to, size_t tosize, const char* from) {
	int tolen;

	for(tolen = 0; *from != '\0' && tolen + 4 < tosize; ++from) {
		if(isalnum(*from) || strchr("/_.-~", *from) != (char*) 0) {
			*to = *from;
			++to;
			++tolen;
		} else {
			(void) sprintf(to, "%%%02x", (int) *from & 0xff);
			to += 3;
			tolen += 3;
		}
	}
	*to = '\0';
}

static void usage(void) {
	(void) fprintf(stderr, "Usage:  %s [-C configfile] [-D] [-S use ssl, if no ssl port is specified all connections will be SSL] [-E certfile] [-SP ssl port] [-Y cipher] [-p port] [-d dir] [-dd data_dir] [-c cgipat] [-u user] [-h hostname] [-l logfile] [-i pidfile] [-T charset] [-L language] [-P P3P] [-M maxage] [-DRN default realm name] [-DRP default realm password file] [-DPF default page file] [-PNF Page to load when 404 Not Found error occurs] \n", argv0);
	exit(1);
}

static void value_required(char* name, char* value) {
	if(value == (char*) 0) {
		(void) fprintf(stderr, "%s: value required for %s option\n", argv0, name);
		exit(1);
	}
}