static int cache_call_lua(server *srv, connection *con, plugin_data *p, buffer *cml_file) {
	buffer *b;
	char *c;

	/* cleanup basedir */
	b = p->baseurl;
	buffer_copy_buffer(b, con->uri.path);
	for (c = b->ptr + buffer_string_length(b); c > b->ptr && *c != '/'; c--);

	if (*c == '/') {
		buffer_string_set_length(b, c - b->ptr + 1);
	}

	b = p->basedir;
	buffer_copy_buffer(b, con->physical.path);
	for (c = b->ptr + buffer_string_length(b); c > b->ptr && *c != '/'; c--);

	if (*c == '/') {
		buffer_string_set_length(b, c - b->ptr + 1);
	}


	/* prepare variables
	 *   - cookie-based
	 *   - get-param-based
	 */
	return cache_parse_lua(srv, con, p, cml_file);
}

static handler_t mod_vhostdb_found (connection *con, vhostdb_entry *ve)
{
    /* fix virtual server and docroot */
    buffer_copy_buffer(con->server_name, ve->server_name);
    buffer_copy_buffer(con->physical.doc_root, ve->document_root);
    return HANDLER_GO_ON;
}

static data_unset *data_string_copy(const data_unset *s) {
	data_string *src = (data_string *)s;
	data_string *ds = data_string_init();

	buffer_copy_buffer(ds->key, src->key);
	buffer_copy_buffer(ds->value, src->value);
	ds->is_index_key = src->is_index_key;
	return (data_unset *)ds;
}

static data_unset *data_fastcgi_copy(const data_unset *s) {
	data_fastcgi *src = (data_fastcgi *)s;
	data_fastcgi *ds = data_fastcgi_init();

	buffer_copy_buffer(ds->key, src->key);
	buffer_copy_buffer(ds->host, src->host);
	ds->is_index_key = src->is_index_key;
	return (data_unset *)ds;
}

static void run_buffer_path_simplify(buffer *psrc, buffer *pdest, const char *in, size_t in_len, const char *out, size_t out_len) {
	buffer_copy_string_len(psrc, in, in_len);

	buffer_path_simplify(pdest, psrc);

	if (!buffer_is_equal_string(pdest, out, out_len)) {
		fprintf(stderr,
			"%s.%d: buffer_path_simplify('%s') failed: expected '%s', got '%s'\n",
			__FILE__,
			__LINE__,
			in,
			out,
			pdest->ptr ? pdest->ptr : "");
		fflush(stderr);
		abort();
	} else {
		if (psrc != pdest) buffer_copy_buffer(psrc, pdest);
		buffer_path_simplify(pdest, psrc);

		if (!buffer_is_equal_string(pdest, out, out_len)) {
			fprintf(stderr,
				"%s.%d: buffer_path_simplify('%s') failed - not idempotent: expected '%s', got '%s'\n",
				__FILE__,
				__LINE__,
				in,
				out,
				pdest->ptr ? pdest->ptr : "");
			fflush(stderr);
			abort();
		}
	}
}

static int log_buffer_prepare(buffer *b, server *srv, const char *filename, unsigned int line) {
	switch(srv->errorlog_mode) {
	case ERRORLOG_PIPE:
	case ERRORLOG_FILE:
	case ERRORLOG_FD:
		if (-1 == srv->errorlog_fd) return -1;
		/* cache the generated timestamp */
		if (srv->cur_ts != srv->last_generated_debug_ts) {
			buffer_string_prepare_copy(srv->ts_debug_str, 255);
			buffer_append_strftime(srv->ts_debug_str, "%Y-%m-%d %H:%M:%S", localtime(&(srv->cur_ts)));

			srv->last_generated_debug_ts = srv->cur_ts;
		}

		buffer_copy_buffer(b, srv->ts_debug_str);
		buffer_append_string_len(b, CONST_STR_LEN(": ("));
		break;
	case ERRORLOG_SYSLOG:
		/* syslog is generating its own timestamps */
		buffer_copy_string_len(b, CONST_STR_LEN("("));
		break;
	}

	buffer_append_string(b, filename);
	buffer_append_string_len(b, CONST_STR_LEN("."));
	buffer_append_int(b, line);
	buffer_append_string_len(b, CONST_STR_LEN(") "));

	return 0;
}

static int excludes_buffer_append(excludes_buffer *exb, buffer *string) {
	size_t i;
	const char *errptr;
	int erroff;

	if (!string) return -1;

	if (exb->used == exb->size) {
		exb->size += 4;

		exb->ptr = realloc(exb->ptr, exb->size * sizeof(*exb->ptr));

		for(i = exb->used; i < exb->size; i++) {
			exb->ptr[i] = calloc(1, sizeof(**exb->ptr));
		}
	}


	if (NULL == (exb->ptr[exb->used]->regex = pcre_compile(string->ptr, 0,
						    &errptr, &erroff, NULL))) {
		return -1;
	}

	exb->ptr[exb->used]->string = buffer_init();
	buffer_copy_buffer(exb->ptr[exb->used]->string, string);

	exb->used++;

	return 0;
}

static int connection_map_insert(connection_map *cm, connection *con, buffer *con_id) {
	connection_map_entry *cme;
	size_t i;

	if (cm->size == 0) {
		cm->size = 16;
		cm->ptr = malloc(cm->size * sizeof(*(cm->ptr)));
		for (i = 0; i < cm->size; i++) {
			cm->ptr[i] = NULL;
		}
	} else if (cm->used == cm->size) {
		cm->size += 16;
		cm->ptr = realloc(cm->ptr, cm->size * sizeof(*(cm->ptr)));
		for (i = cm->used; i < cm->size; i++) {
			cm->ptr[i] = NULL;
		}
	}

	if (cm->ptr[cm->used]) {
		/* is already alloced, just reuse it */
		cme = cm->ptr[cm->used];
	} else {
		cme = malloc(sizeof(*cme));
	}
	cme->con_id = buffer_init();
	buffer_copy_buffer(cme->con_id, con_id);
	cme->con = con;

	cm->ptr[cm->used++] = cme;

	return 0;
}

static handler_t mod_simple_vhost_docroot(server *srv, connection *con, void *p_data) {
	plugin_data *p = p_data;

	/*
	 * cache the last successfull translation from hostname (authority) to docroot
	 * - this saves us a stat() call
	 *
	 */

	mod_simple_vhost_patch_connection(srv, con, p);

	/* build_doc_root() requires a server_root; skip module if simple-vhost.server-root is not set
	 * or set to an empty string (especially don't cache any results!)
	 */
	if (buffer_string_is_empty(p->conf.server_root)) return HANDLER_GO_ON;

	if (!buffer_string_is_empty(p->conf.docroot_cache_key) &&
	    !buffer_string_is_empty(con->uri.authority) &&
	    buffer_is_equal(p->conf.docroot_cache_key, con->uri.authority)) {
		/* cache hit */
		buffer_copy_buffer(con->server_name,       p->conf.docroot_cache_servername);
		buffer_copy_buffer(con->physical.doc_root, p->conf.docroot_cache_value);
	} else {
		/* build document-root */
		if (buffer_string_is_empty(con->uri.authority) ||
		    build_doc_root(srv, con, p, p->doc_root, con->uri.authority)) {
			/* not found, fallback the default-host */
			if (0 == build_doc_root(srv, con, p,
					   p->doc_root,
					   p->conf.default_host)) {
				/* default host worked */
				buffer_copy_buffer(con->server_name, p->conf.default_host);
				buffer_copy_buffer(con->physical.doc_root, p->doc_root);
				/* do not cache default host */
			}
			return HANDLER_GO_ON;
		}

		/* found host */
		buffer_copy_buffer(con->server_name, con->uri.authority);
		buffer_copy_buffer(con->physical.doc_root, p->doc_root);

		/* copy to cache */
		buffer_copy_buffer(p->conf.docroot_cache_key,        con->uri.authority);
		buffer_copy_buffer(p->conf.docroot_cache_value,      p->doc_root);
		buffer_copy_buffer(p->conf.docroot_cache_servername, con->server_name);
	}

	return HANDLER_GO_ON;
}

static data_unset *data_array_copy(const data_unset *s) {
	data_array *src = (data_array *)s;
	data_array *ds = data_array_init();

	buffer_copy_buffer(ds->key, src->key);
	array_free(ds->value);
	ds->value = array_init_array(src->value);
	ds->is_index_key = src->is_index_key;
	return (data_unset *)ds;
}

static void http_list_directory_footer(server *srv, connection *con, plugin_data *p, buffer *out) {
	UNUSED(srv);

	buffer_append_string_len(out, CONST_STR_LEN(
		"</tbody>\n"
		"</table>\n"
		"</div>\n"
	));

	if (!buffer_string_is_empty(p->conf.show_readme)) {
		/* if we have a README file, display it in <pre class="readme"></pre> */

		buffer *rb = p->conf.show_readme;
		if (rb->ptr[0] != '/') {
			buffer_copy_buffer(p->tmp_buf,  con->physical.path);
			buffer_append_path_len(p->tmp_buf, CONST_BUF_LEN(p->conf.show_readme));
			rb = p->tmp_buf;
		}

		http_list_directory_include_file(out, con->conf.follow_symlink, rb, "readme", p->conf.encode_readme);
	}

	if(p->conf.auto_layout) {

		buffer_append_string_len(out, CONST_STR_LEN(
			"<div class=\"foot\">"
		));

		if (!buffer_string_is_empty(p->conf.set_footer)) {
			buffer_append_string_buffer(out, p->conf.set_footer);
		} else {
			buffer_append_string_buffer(out, con->conf.server_tag);
		}

		buffer_append_string_len(out, CONST_STR_LEN(
			"</div>\n"
		));

		if (!buffer_string_is_empty(p->conf.external_js)) {
			buffer_append_string_len(out, CONST_STR_LEN("<script type=\"text/javascript\" src=\""));
			buffer_append_string_buffer(out, p->conf.external_js);
			buffer_append_string_len(out, CONST_STR_LEN("\"></script>\n"));
		} else if (buffer_is_empty(p->conf.external_js)) {
			http_dirlist_append_js_table_resort(out, con);
		}

		buffer_append_string_len(out, CONST_STR_LEN(
			"</body>\n"
			"</html>\n"
		));
	}
}

static void http_list_directory_footer(server *srv, connection *con, plugin_data *p, buffer *out) {
	UNUSED(srv);

	buffer_append_string_len(out, CONST_STR_LEN(
		"</tbody>\n"
		"</table>\n"
		"</div>\n"
	));

	if (p->conf.show_readme) {
		stream s;
		/* if we have a README file, display it in <pre class="readme"></pre> */

		buffer_copy_buffer(p->tmp_buf,  con->physical.path);
		buffer_append_slash(p->tmp_buf);
		buffer_append_string_len(p->tmp_buf, CONST_STR_LEN("README.txt"));

		if (-1 != stream_open(&s, p->tmp_buf)) {
			if (p->conf.encode_readme) {
				buffer_append_string_len(out, CONST_STR_LEN("<pre class=\"readme\">"));
				buffer_append_string_encoded(out, s.start, s.size, ENCODING_MINIMAL_XML);
				buffer_append_string_len(out, CONST_STR_LEN("</pre>"));
			} else {
				buffer_append_string_len(out, s.start, s.size);
			}
		}
		stream_close(&s);
	}

	if(p->conf.auto_layout) {
		buffer_append_string_len(out, CONST_STR_LEN(
			"<div class=\"foot\">"
		));

		if (!buffer_string_is_empty(p->conf.set_footer)) {
			buffer_append_string_buffer(out, p->conf.set_footer);
		} else if (buffer_is_empty(con->conf.server_tag)) {
			buffer_append_string_len(out, CONST_STR_LEN(PACKAGE_DESC));
		} else {
			buffer_append_string_buffer(out, con->conf.server_tag);
		}

		buffer_append_string_len(out, CONST_STR_LEN(
			"</div>\n"
			"</body>\n"
			"</html>\n"
		));
	}
}

static int data_string_insert_dup(data_unset *dst, data_unset *src) {
	data_string *ds_dst = (data_string *)dst;
	data_string *ds_src = (data_string *)src;

	if (!buffer_is_empty(ds_dst->value)) {
		buffer_append_string_len(ds_dst->value, CONST_STR_LEN(", "));
		buffer_append_string_buffer(ds_dst->value, ds_src->value);
	} else {
		buffer_copy_buffer(ds_dst->value, ds_src->value);
	}

	src->free(src);

	return 0;
}

void chunkqueue_append_file(chunkqueue *cq, buffer *fn, off_t offset, off_t len) {
    chunk *c;

    if (0 == len) return;

    c = chunkqueue_get_unused_chunk(cq);

    c->type = FILE_CHUNK;

    buffer_copy_buffer(c->file.name, fn);
    c->file.start = offset;
    c->file.length = len;
    c->offset = 0;

    chunkqueue_append_chunk(cq, c);
}

static int build_doc_root(server *srv, connection *con, plugin_data *p, buffer *out, buffer *host) {
	stat_cache_entry *sce = NULL;
	force_assert(!buffer_string_is_empty(p->conf.server_root));

	buffer_string_prepare_copy(out, 127);
	buffer_copy_buffer(out, p->conf.server_root);

	if (!buffer_string_is_empty(host)) {
		/* a hostname has to start with a alpha-numerical character
		 * and must not contain a slash "/"
		 */
		char *dp;

		buffer_append_slash(out);

		if (NULL == (dp = strchr(host->ptr, ':'))) {
			buffer_append_string_buffer(out, host);
		} else {
			buffer_append_string_len(out, host->ptr, dp - host->ptr);
		}
	}
	buffer_append_slash(out);

	if (buffer_string_length(p->conf.document_root) > 1 && p->conf.document_root->ptr[0] == '/') {
		buffer_append_string_len(out, p->conf.document_root->ptr + 1, buffer_string_length(p->conf.document_root) - 1);
	} else {
		buffer_append_string_buffer(out, p->conf.document_root);
		buffer_append_slash(out);
	}

	if (HANDLER_ERROR == stat_cache_get_entry(srv, con, out, &sce)) {
		if (p->conf.debug) {
			log_error_write(srv, __FILE__, __LINE__, "sb",
					strerror(errno), out);
		}
		return -1;
	} else if (!S_ISDIR(sce->st.st_mode)) {
		return -1;
	}

	return 0;
}

static void http_list_directory_footer(server *srv, connection *con, plugin_data *p, buffer *out) {
	UNUSED(srv);

	buffer_append_string_len(out, CONST_STR_LEN(
		"</tbody>\n"
		"</table>\n"
		"</div>\n"
	));

	if (p->conf.show_readme) {
		/* if we have a README file, display it in <pre class="readme"></pre> */

		buffer_copy_buffer(p->tmp_buf,  con->physical.path);
		buffer_append_slash(p->tmp_buf);
		buffer_append_string_len(p->tmp_buf, CONST_STR_LEN("README.txt"));

		http_list_directory_include_file(out, p->tmp_buf, "readme", p->conf.encode_readme);
	}

	if(p->conf.auto_layout) {
		buffer_append_string_len(out, CONST_STR_LEN(
			"<div class=\"foot\">"
		));

		if (!buffer_string_is_empty(p->conf.set_footer)) {
			buffer_append_string_buffer(out, p->conf.set_footer);
		} else {
			buffer_append_string_buffer(out, con->conf.server_tag);
		}

		buffer_append_string_len(out, CONST_STR_LEN(
			"</div>\n"
			"</body>\n"
			"</html>\n"
		));
	}
}

lua_State *script_cache_get_script(server *srv, connection *con, script_cache *cache, buffer *name) {
	size_t i;
	script *sc = NULL;
	stat_cache_entry *sce;

	for (i = 0; i < cache->used; i++) {
		sc = cache->ptr[i];

		if (buffer_is_equal(name, sc->name)) {
			sc->last_used = time(NULL);

			/* oops, the script failed last time */

			if (lua_gettop(sc->L) == 0) break;
			force_assert(lua_gettop(sc->L) == 1);

			if (HANDLER_ERROR == stat_cache_get_entry(srv, con, sc->name, &sce)) {
				lua_pop(sc->L, 1); /* pop the old function */
				break;
			}

			if (!buffer_is_equal(sce->etag, sc->etag)) {
				/* the etag is outdated, reload the function */
				lua_pop(sc->L, 1);
				break;
			}

			force_assert(lua_isfunction(sc->L, -1));

			return sc->L;
		}

		sc = NULL;
	}

	/* if the script was script already loaded but either got changed or
	 * failed to load last time */
	if (sc == NULL) {
		sc = script_init();

		if (cache->size == 0) {
			cache->size = 16;
			cache->ptr = malloc(cache->size * sizeof(*(cache->ptr)));
		} else if (cache->used == cache->size) {
			cache->size += 16;
			cache->ptr = realloc(cache->ptr, cache->size * sizeof(*(cache->ptr)));
		}

		cache->ptr[cache->used++] = sc;

		buffer_copy_buffer(sc->name, name);

		sc->L = luaL_newstate();
		luaL_openlibs(sc->L);
	}

	sc->last_used = time(NULL);

	if (0 != luaL_loadfile(sc->L, name->ptr)) {
		/* oops, an error, return it */
		return sc->L;
	}

	if (HANDLER_GO_ON == stat_cache_get_entry(srv, con, sc->name, &sce)) {
		buffer_copy_buffer(sc->etag, sce->etag);
	}

	force_assert(lua_isfunction(sc->L, -1));

	return sc->L;
}

handler_t stat_cache_get_entry(server *srv, connection *con, buffer *name, stat_cache_entry **ret_sce) {
#ifdef HAVE_FAM_H
	fam_dir_entry *fam_dir = NULL;
	int dir_ndx = -1;
	splay_tree *dir_node = NULL;
#endif
	stat_cache_entry *sce = NULL;
	stat_cache *sc;
	struct stat st;
	size_t k;
	int fd;
	struct stat lst;
#ifdef DEBUG_STAT_CACHE
	size_t i;
#endif

	int file_ndx;
	splay_tree *file_node = NULL;

	*ret_sce = NULL;

	/*
	 * check if the directory for this file has changed
	 */

	sc = srv->stat_cache;

	buffer_copy_buffer(sc->hash_key, name);
	buffer_append_int(sc->hash_key, con->conf.follow_symlink);

	file_ndx = hashme(sc->hash_key);
	sc->files = splaytree_splay(sc->files, file_ndx);

#ifdef DEBUG_STAT_CACHE
	for (i = 0; i < ctrl.used; i++) {
		if (ctrl.ptr[i] == file_ndx) break;
	}
#endif

	if (sc->files && (sc->files->key == file_ndx)) {
#ifdef DEBUG_STAT_CACHE
		/* it was in the cache */
		force_assert(i < ctrl.used);
#endif

		/* we have seen this file already and
		 * don't stat() it again in the same second */

		file_node = sc->files;

		sce = file_node->data;

		/* check if the name is the same, we might have a collision */

		if (buffer_is_equal(name, sce->name)) {
			if (srv->srvconf.stat_cache_engine == STAT_CACHE_ENGINE_SIMPLE) {
				if (sce->stat_ts == srv->cur_ts) {
					*ret_sce = sce;
					return HANDLER_GO_ON;
				}
			}
		} else {
			/* oops, a collision,
			 *
			 * file_node is used by the FAM check below to see if we know this file
			 * and if we can save a stat().
			 *
			 * BUT, the sce is not reset here as the entry into the cache is ok, we
			 * it is just not pointing to our requested file.
			 *
			 *  */

			file_node = NULL;
		}
	} else {
#ifdef DEBUG_STAT_CACHE
		if (i != ctrl.used) {
			log_error_write(srv, __FILE__, __LINE__, "xSB",
				file_ndx, "was already inserted but not found in cache, ", name);
		}
		force_assert(i == ctrl.used);
#endif
	}

#ifdef HAVE_FAM_H
	/* dir-check */
	if (srv->srvconf.stat_cache_engine == STAT_CACHE_ENGINE_FAM) {
		if (0 != buffer_copy_dirname(sc->dir_name, name)) {
			log_error_write(srv, __FILE__, __LINE__, "sb",
				"no '/' found in filename:", name);
			return HANDLER_ERROR;
		}

		buffer_copy_buffer(sc->hash_key, sc->dir_name);
		buffer_append_int(sc->hash_key, con->conf.follow_symlink);

		dir_ndx = hashme(sc->hash_key);

		sc->dirs = splaytree_splay(sc->dirs, dir_ndx);

//.........这里部分代码省略.........

static handler_t mod_redirect_uri_handler(server *srv, connection *con, void *p_data) {
#ifdef HAVE_PCRE_H
	plugin_data *p = p_data;
	size_t i;

	/*
	 * REWRITE URL
	 *
	 * e.g. redirect /base/ to /index.php?section=base
	 *
	 */

	mod_redirect_patch_connection(srv, con, p);

	buffer_copy_buffer(p->match_buf, con->request.uri);

	for (i = 0; i < p->conf.redirect->used; i++) {
		pcre *match;
		pcre_extra *extra;
		const char *pattern;
		size_t pattern_len;
		int n;
		pcre_keyvalue *kv = p->conf.redirect->kv[i];
# define N 10
		int ovec[N * 3];

		match       = kv->key;
		extra       = kv->key_extra;
		pattern     = kv->value->ptr;
		pattern_len = buffer_string_length(kv->value);

		if ((n = pcre_exec(match, extra, CONST_BUF_LEN(p->match_buf), 0, 0, ovec, 3 * N)) < 0) {
			if (n != PCRE_ERROR_NOMATCH) {
				log_error_write(srv, __FILE__, __LINE__, "sd",
						"execution error while matching: ", n);
				return HANDLER_ERROR;
			}
		} else {
			const char **list;
			size_t start;
			size_t k;

			/* it matched */
			pcre_get_substring_list(p->match_buf->ptr, ovec, n, &list);

			/* search for $[0-9] */

			buffer_reset(p->location);

			start = 0;
			for (k = 0; k + 1 < pattern_len; k++) {
				if (pattern[k] == '$' || pattern[k] == '%') {
					/* got one */

					size_t num = pattern[k + 1] - '0';

					buffer_append_string_len(p->location, pattern + start, k - start);

					if (!isdigit((unsigned char)pattern[k + 1])) {
						/* enable escape: "%%" => "%", "%a" => "%a", "$$" => "$" */
						buffer_append_string_len(p->location, pattern+k, pattern[k] == pattern[k+1] ? 1 : 2);
					} else if (pattern[k] == '$') {
						/* n is always > 0 */
						if (num < (size_t)n) {
							buffer_append_string(p->location, list[num]);
						}
					} else if (p->conf.context == NULL) {
						/* we have no context, we are global */
						log_error_write(srv, __FILE__, __LINE__, "sb",
								"used a rewrite containing a %[0-9]+ in the global scope, ignored:",
								kv->value);
					} else {
						config_append_cond_match_buffer(con, p->conf.context, p->location, num);
					}

					k++;
					start = k + 1;
				}
			}

			buffer_append_string_len(p->location, pattern + start, pattern_len - start);

			pcre_free(list);

			response_header_insert(srv, con, CONST_STR_LEN("Location"), CONST_BUF_LEN(p->location));

			con->http_status = p->conf.redirect_code > 99 && p->conf.redirect_code < 1000 ? p->conf.redirect_code : 301;
			con->mode = DIRECT;
			con->file_finished = 1;

			return HANDLER_FINISHED;
		}
	}
#undef N

#else
	UNUSED(srv);
	UNUSED(con);
	UNUSED(p_data);
#endif
//.........这里部分代码省略.........

static int network_server_init(server *srv, buffer *host_token, specific_config *s) {
	int val;
	socklen_t addr_len;
	server_socket *srv_socket;
	unsigned int port = 0;
	const char *host;
	buffer *b;
	int err;

#ifdef __WIN32
	WORD wVersionRequested;
	WSADATA wsaData;

	wVersionRequested = MAKEWORD( 2, 2 );

	err = WSAStartup( wVersionRequested, &wsaData );
	if ( err != 0 ) {
		    /* Tell the user that we could not find a usable */
		    /* WinSock DLL.                                  */
		    return -1;
	}
#endif
	err = -1;

	srv_socket = calloc(1, sizeof(*srv_socket));
	force_assert(NULL != srv_socket);
	srv_socket->addr.plain.sa_family = AF_INET; /* default */
	srv_socket->fd = -1;
	srv_socket->fde_ndx = -1;

	srv_socket->srv_token = buffer_init();
	buffer_copy_buffer(srv_socket->srv_token, host_token);

	b = buffer_init();
	buffer_copy_buffer(b, host_token);

	host = b->ptr;

	if (host[0] == '/') {
		/* host is a unix-domain-socket */
#ifdef HAVE_SYS_UN_H
		srv_socket->addr.plain.sa_family = AF_UNIX;
#else
		log_error_write(srv, __FILE__, __LINE__, "s",
				"ERROR: Unix Domain sockets are not supported.");
		goto error_free_socket;
#endif
	} else {
		/* ipv4:port
		 * [ipv6]:port
		 */
		size_t len = buffer_string_length(b);
		char *sp = NULL;
		if (0 == len) {
			log_error_write(srv, __FILE__, __LINE__, "s", "value of $SERVER[\"socket\"] must not be empty");
			goto error_free_socket;
		}
		if ((b->ptr[0] == '[' && b->ptr[len-1] == ']') || NULL == (sp = strrchr(b->ptr, ':'))) {
			/* use server.port if set in config, or else default from config_set_defaults() */
			port = srv->srvconf.port;
			sp = b->ptr + len; /* point to '\0' at end of string so end of IPv6 address can be found below */
		} else {
			/* found ip:port separator at *sp; port doesn't end in ']', so *sp hopefully doesn't split an IPv6 address */
			*sp = '\0';
			port = strtol(sp+1, NULL, 10);
		}

		/* check for [ and ] */
		if (b->ptr[0] == '[' && *(sp-1) == ']') {
			*(sp-1) = '\0';
			host++;

			s->use_ipv6 = 1;
		}

		if (port == 0 || port > 65535) {
			log_error_write(srv, __FILE__, __LINE__, "sd", "port not set or out of range:", port);

			goto error_free_socket;
		}
	}

	if (*host == '\0') host = NULL;

#ifdef HAVE_IPV6
	if (s->use_ipv6) {
		srv_socket->addr.plain.sa_family = AF_INET6;
	}
#endif

	switch(srv_socket->addr.plain.sa_family) {
#ifdef HAVE_IPV6
	case AF_INET6:
		memset(&srv_socket->addr, 0, sizeof(struct sockaddr_in6));
		srv_socket->addr.ipv6.sin6_family = AF_INET6;
		if (host == NULL) {
			srv_socket->addr.ipv6.sin6_addr = in6addr_any;
			log_error_write(srv, __FILE__, __LINE__, "s", "warning: please use server.use-ipv6 only for hostnames, not without server.bind / empty address; your config will break if the kernel default for IPV6_V6ONLY changes");
		} else {
			struct addrinfo hints, *res;
//.........这里部分代码省略.........