renamed interface.c to client.c

I don't believe "interface" is a good name for something like
"connection by a client to MPD", let's call it "client".  This is the
first patch in the series which changes the name, beginning with the
file name.

1 files changed, 0 insertions, 797 deletions

diff --git a/src/interface.c b/src/interface.c
deleted file mode 100644
index ade2e36fc..000000000
--- a/src/interface.c
+++ /dev/null
@@ -1,797 +0,0 @@
-/* the Music Player Daemon (MPD)
- * Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
- * This project's homepage is: http://www.musicpd.org
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
- */
-
-#include "interface.h"
-#include "command.h"
-#include "conf.h"
-#include "log.h"
-#include "listen.h"
-#include "permission.h"
-#include "sllist.h"
-#include "utils.h"
-#include "ioops.h"
-#include "myfprintf.h"
-#include "os_compat.h"
-#include "main_notify.h"
-
-#include "../config.h"
-
-#define GREETING				"OK MPD " PROTOCOL_VERSION "\n"
-
-#define INTERFACE_MAX_BUFFER_LENGTH			(40960)
-#define INTERFACE_LIST_MODE_BEGIN			"command_list_begin"
-#define INTERFACE_LIST_OK_MODE_BEGIN			"command_list_ok_begin"
-#define INTERFACE_LIST_MODE_END				"command_list_end"
-#define INTERFACE_DEFAULT_OUT_BUFFER_SIZE		(4096)
-#define INTERFACE_TIMEOUT_DEFAULT			(60)
-#define INTERFACE_MAX_CONNECTIONS_DEFAULT		(10)
-#define INTERFACE_MAX_COMMAND_LIST_DEFAULT		(2048*1024)
-#define INTERFACE_MAX_OUTPUT_BUFFER_SIZE_DEFAULT	(8192*1024)
-
-/* set this to zero to indicate we have no possible interfaces */
-static unsigned int interface_max_connections;	/*INTERFACE_MAX_CONNECTIONS_DEFAULT; */
-static int interface_timeout = INTERFACE_TIMEOUT_DEFAULT;
-static size_t interface_max_command_list_size =
-    INTERFACE_MAX_COMMAND_LIST_DEFAULT;
-static size_t interface_max_output_buffer_size =
-    INTERFACE_MAX_OUTPUT_BUFFER_SIZE_DEFAULT;
-
-/* maybe make conf option for this, or... 32 might be good enough */
-static long int interface_list_cache_size = 32;
-
-/* shared globally between all interfaces: */
-static struct strnode *list_cache;
-static struct strnode *list_cache_head;
-static struct strnode *list_cache_tail;
-
-typedef struct _Interface {
-	char buffer[INTERFACE_MAX_BUFFER_LENGTH];
-	size_t bufferLength;
-	size_t bufferPos;
-	int fd;	/* file descriptor */
-	int permission;
-	time_t lastTime;
-	struct strnode *cmd_list;	/* for when in list mode */
-	struct strnode *cmd_list_tail;	/* for when in list mode */
-	int cmd_list_OK;	/* print OK after each command execution */
-	size_t cmd_list_size;	/* mem cmd_list consumes */
-	int cmd_list_dup;	/* has the cmd_list been copied to private space? */
-	struct sllnode *deferred_send;	/* for output if client is slow */
-	size_t deferred_bytes;	/* mem deferred_send consumes */
-	int expired;	/* set whether this interface should be closed on next
-			   check of old interfaces */
-	unsigned int num;	/* interface number */
-
-	char *send_buf;
-	size_t send_buf_used;	/* bytes used this instance */
-	size_t send_buf_size;	/* bytes usable this instance */
-	size_t send_buf_alloc;	/* bytes actually allocated */
-} Interface;
-
-static Interface *interfaces;
-
-static void flushInterfaceBuffer(Interface * interface);
-
-static void printInterfaceOutBuffer(Interface * interface);
-
-#ifdef SO_SNDBUF
-static size_t get_default_snd_buf_size(Interface * interface)
-{
-	int new_size;
-	socklen_t sockOptLen = sizeof(int);
-
-	if (getsockopt(interface->fd, SOL_SOCKET, SO_SNDBUF,
-		       (char *)&new_size, &sockOptLen) < 0) {
-		DEBUG("problem getting sockets send buffer size\n");
-		return INTERFACE_DEFAULT_OUT_BUFFER_SIZE;
-	}
-	if (new_size > 0)
-		return (size_t)new_size;
-	DEBUG("sockets send buffer size is not positive\n");
-	return INTERFACE_DEFAULT_OUT_BUFFER_SIZE;
-}
-#else /* !SO_SNDBUF */
-static size_t get_default_snd_buf_size(Interface * interface)
-{
-	return INTERFACE_DEFAULT_OUT_BUFFER_SIZE;
-}
-#endif /* !SO_SNDBUF */
-
-static void set_send_buf_size(Interface * interface)
-{
-	size_t new_size = get_default_snd_buf_size(interface);
-	if (interface->send_buf_size != new_size) {
-		interface->send_buf_size = new_size;
-		/* don't resize to get smaller, only bigger */
-		if (interface->send_buf_alloc < new_size) {
-			if (interface->send_buf)
-				free(interface->send_buf);
-			interface->send_buf = xmalloc(new_size);
-			interface->send_buf_alloc = new_size;
-		}
-	}
-}
-
-static void openInterface(Interface * interface, int fd)
-{
-	assert(interface->fd < 0);
-
-	interface->cmd_list_size = 0;
-	interface->cmd_list_dup = 0;
-	interface->cmd_list_OK = -1;
-	interface->bufferLength = 0;
-	interface->bufferPos = 0;
-	interface->fd = fd;
-	set_nonblocking(fd);
-	interface->lastTime = time(NULL);
-	interface->cmd_list = NULL;
-	interface->cmd_list_tail = NULL;
-	interface->deferred_send = NULL;
-	interface->expired = 0;
-	interface->deferred_bytes = 0;
-	interface->send_buf_used = 0;
-
-	interface->permission = getDefaultPermissions();
-	set_send_buf_size(interface);
-
-	xwrite(fd, GREETING, strlen(GREETING));
-}
-
-static void free_cmd_list(struct strnode *list)
-{
-	struct strnode *tmp = list;
-
-	while (tmp) {
-		struct strnode *next = tmp->next;
-		if (tmp >= list_cache_head && tmp <= list_cache_tail) {
-			/* inside list_cache[] array */
-			tmp->data = NULL;
-			tmp->next = NULL;
-		} else
-			free(tmp);
-		tmp = next;
-	}
-}
-
-static void cmd_list_clone(Interface * interface)
-{
-	struct strnode *new = dup_strlist(interface->cmd_list);
-	free_cmd_list(interface->cmd_list);
-	interface->cmd_list = new;
-	interface->cmd_list_dup = 1;
-
-	/* new tail */
-	while (new && new->next)
-		new = new->next;
-	interface->cmd_list_tail = new;
-}
-
-static void new_cmd_list_ptr(Interface * interface, char *s, const int size)
-{
-	int i;
-	struct strnode *new;
-
-	if (!interface->cmd_list_dup) {
-		for (i = interface_list_cache_size - 1; i >= 0; --i) {
-			if (list_cache[i].data)
-				continue;
-			new = &(list_cache[i]);
-			new->data = s;
-			/* implied in free_cmd_list() and init: */
-			/* last->next->next = NULL; */
-			goto out;
-		}
-	}
-
-	/* allocate from the heap */
-	new = interface->cmd_list_dup ? new_strnode_dup(s, size)
-	                              : new_strnode(s);
-out:
-	if (interface->cmd_list) {
-		interface->cmd_list_tail->next = new;
-		interface->cmd_list_tail = new;
-	} else
-		interface->cmd_list = interface->cmd_list_tail = new;
-}
-
-static void closeInterface(Interface * interface)
-{
-	struct sllnode *buf;
-	if (interface->fd < 0)
-		return;
-	xclose(interface->fd);
-	interface->fd = -1;
-
-	if (interface->cmd_list) {
-		free_cmd_list(interface->cmd_list);
-		interface->cmd_list = NULL;
-	}
-
-	if ((buf = interface->deferred_send)) {
-		do {
-			struct sllnode *prev = buf;
-			buf = buf->next;
-			free(prev);
-		} while (buf);
-		interface->deferred_send = NULL;
-	}
-
-	SECURE("interface %i: closed\n", interface->num);
-}
-
-void openAInterface(int fd, const struct sockaddr *addr)
-{
-	unsigned int i;
-
-	for (i = 0; i < interface_max_connections
-	     && interfaces[i].fd >= 0; i++) /* nothing */ ;
-
-	if (i == interface_max_connections) {
-		ERROR("Max Connections Reached!\n");
-		xclose(fd);
-	} else {
-		const char *hostname;
-		switch (addr->sa_family) {
-#ifdef HAVE_TCP
-		case AF_INET:
-			hostname = (const char *)inet_ntoa(((const struct sockaddr_in *)
-			                                    addr)->sin_addr);
-			if (!hostname)
-				hostname = "error getting ipv4 address";
-			break;
-#ifdef HAVE_IPV6
-		case AF_INET6:
-			{
-				static char host[INET6_ADDRSTRLEN + 1];
-				memset(host, 0, INET6_ADDRSTRLEN + 1);
-				if (inet_ntop(AF_INET6, (const void *)
-					      &(((const struct sockaddr_in6 *)addr)->
-						sin6_addr), host,
-					      INET6_ADDRSTRLEN)) {
-					hostname = (const char *)host;
-				} else {
-					hostname = "error getting ipv6 address";
-				}
-			}
-			break;
-#endif
-#endif /* HAVE_TCP */
-#ifdef HAVE_UN
-		case AF_UNIX:
-			hostname = "local connection";
-			break;
-#endif /* HAVE_UN */
-		default:
-			hostname = "unknown";
-		}
-		SECURE("interface %i: opened from %s\n", i, hostname);
-		openInterface(&(interfaces[i]), fd);
-	}
-}
-
-static int processLineOfInput(Interface * interface)
-{
-	int ret = 1;
-	char *line = interface->buffer + interface->bufferPos;
-
-	if (interface->cmd_list_OK >= 0) {
-		if (strcmp(line, INTERFACE_LIST_MODE_END) == 0) {
-			DEBUG("interface %i: process command "
-			      "list\n", interface->num);
-			ret = processListOfCommands(interface->fd,
-						    &(interface->permission),
-						    &(interface->expired),
-						    interface->cmd_list_OK,
-						    interface->cmd_list);
-			DEBUG("interface %i: process command "
-			      "list returned %i\n", interface->num, ret);
-			if (ret == 0)
-				commandSuccess(interface->fd);
-			else if (ret == COMMAND_RETURN_CLOSE
-				 || interface->expired)
-				closeInterface(interface);
-
-			printInterfaceOutBuffer(interface);
-			free_cmd_list(interface->cmd_list);
-			interface->cmd_list = NULL;
-			interface->cmd_list_OK = -1;
-		} else {
-			size_t len = strlen(line) + 1;
-			interface->cmd_list_size += len;
-			if (interface->cmd_list_size >
-			    interface_max_command_list_size) {
-				ERROR("interface %i: command "
-				      "list size (%lu) is "
-				      "larger than the max "
-				      "(%lu)\n",
-				      interface->num,
-				      (unsigned long)interface->cmd_list_size,
-				      (unsigned long)
-				      interface_max_command_list_size);
-				closeInterface(interface);
-				ret = COMMAND_RETURN_CLOSE;
-			} else
-				new_cmd_list_ptr(interface, line, len);
-		}
-	} else {
-		if (strcmp(line, INTERFACE_LIST_MODE_BEGIN) == 0) {
-			interface->cmd_list_OK = 0;
-			ret = 1;
-		} else if (strcmp(line, INTERFACE_LIST_OK_MODE_BEGIN) == 0) {
-			interface->cmd_list_OK = 1;
-			ret = 1;
-		} else {
-			DEBUG("interface %i: process command \"%s\"\n",
-			      interface->num, line);
-			ret = processCommand(interface->fd,
-					     &(interface->permission), line);
-			DEBUG("interface %i: command returned %i\n",
-			      interface->num, ret);
-			if (ret == 0)
-				commandSuccess(interface->fd);
-			else if (ret == COMMAND_RETURN_CLOSE
-				 || interface->expired) {
-				closeInterface(interface);
-			}
-			printInterfaceOutBuffer(interface);
-		}
-	}
-
-	return ret;
-}
-
-static int processBytesRead(Interface * interface, int bytesRead)
-{
-	int ret = 0;
-	char *buf_tail = &(interface->buffer[interface->bufferLength - 1]);
-
-	while (bytesRead > 0) {
-		interface->bufferLength++;
-		bytesRead--;
-		buf_tail++;
-		if (*buf_tail == '\n') {
-			*buf_tail = '\0';
-			if (interface->bufferLength > interface->bufferPos) {
-				if (*(buf_tail - 1) == '\r')
-					*(buf_tail - 1) = '\0';
-			}
-			ret = processLineOfInput(interface);
-			if (interface->expired)
-				return ret;
-			interface->bufferPos = interface->bufferLength;
-		}
-		if (interface->bufferLength == INTERFACE_MAX_BUFFER_LENGTH) {
-			if (interface->bufferPos == 0) {
-				ERROR("interface %i: buffer overflow\n",
-				      interface->num);
-				closeInterface(interface);
-				return 1;
-			}
-			if (interface->cmd_list_OK >= 0 &&
-			    interface->cmd_list &&
-			    !interface->cmd_list_dup)
-				cmd_list_clone(interface);
-			assert(interface->bufferLength >= interface->bufferPos
-			       && "bufferLength >= bufferPos");
-			interface->bufferLength -= interface->bufferPos;
-			memmove(interface->buffer,
-				interface->buffer + interface->bufferPos,
-				interface->bufferLength);
-			interface->bufferPos = 0;
-		}
-		if (ret == COMMAND_RETURN_KILL || ret == COMMAND_RETURN_CLOSE) {
-			return ret;
-		}
-
-	}
-
-	return ret;
-}
-
-static int interfaceReadInput(Interface * interface)
-{
-	int bytesRead;
-
-	bytesRead = read(interface->fd,
-			 interface->buffer + interface->bufferLength,
-			 INTERFACE_MAX_BUFFER_LENGTH - interface->bufferLength);
-
-	if (bytesRead > 0)
-		return processBytesRead(interface, bytesRead);
-	else if (bytesRead == 0 || (bytesRead < 0 && errno != EINTR)) {
-		closeInterface(interface);
-	} else
-		return 0;
-
-	return 1;
-}
-
-static void addInterfacesReadyToReadAndListenSocketToFdSet(fd_set * fds,
-							   int *fdmax)
-{
-	unsigned int i;
-
-	FD_ZERO(fds);
-	addListenSocketsToFdSet(fds, fdmax);
-
-	for (i = 0; i < interface_max_connections; i++) {
-		if (interfaces[i].fd >= 0 && !interfaces[i].expired
-		    && !interfaces[i].deferred_send) {
-			FD_SET(interfaces[i].fd, fds);
-			if (*fdmax < interfaces[i].fd)
-				*fdmax = interfaces[i].fd;
-		}
-	}
-}
-
-static void addInterfacesForBufferFlushToFdSet(fd_set * fds, int *fdmax)
-{
-	unsigned int i;
-
-	FD_ZERO(fds);
-
-	for (i = 0; i < interface_max_connections; i++) {
-		if (interfaces[i].fd >= 0 && !interfaces[i].expired
-		    && interfaces[i].deferred_send) {
-			FD_SET(interfaces[i].fd, fds);
-			if (*fdmax < interfaces[i].fd)
-				*fdmax = interfaces[i].fd;
-		}
-	}
-}
-
-static void closeNextErroredInterface(void)
-{
-	fd_set fds;
-	struct timeval tv;
-	unsigned int i;
-
-	tv.tv_sec = 0;
-	tv.tv_usec = 0;
-
-	for (i = 0; i < interface_max_connections; i++) {
-		if (interfaces[i].fd >= 0) {
-			FD_ZERO(&fds);
-			FD_SET(interfaces[i].fd, &fds);
-			if (select(interfaces[i].fd + 1,
-			           &fds, NULL, NULL, &tv) < 0) {
-				closeInterface(&interfaces[i]);
-				return;
-			}
-		}
-	}
-}
-
-int doIOForInterfaces(void)
-{
-	fd_set rfds;
-	fd_set wfds;
-	fd_set efds;
-	unsigned int i;
-	int selret;
-	int fdmax;
-
-	while (1) {
-		fdmax = 0;
-
-		FD_ZERO( &efds );
-		addInterfacesReadyToReadAndListenSocketToFdSet(&rfds, &fdmax);
-		addInterfacesForBufferFlushToFdSet(&wfds, &fdmax);
-
-		registered_IO_add_fds(&fdmax, &rfds, &wfds, &efds);
-
-		main_notify_lock();
-		selret = select(fdmax + 1, &rfds, &wfds, &efds, NULL);
-		main_notify_unlock();
-
-		if (selret < 0 && errno == EINTR)
-			break;
-
-		registered_IO_consume_fds(&selret, &rfds, &wfds, &efds);
-
-		if (selret == 0)
-			break;
-
-		if (selret < 0) {
-			closeNextErroredInterface();
-			continue;
-		}
-
-		getConnections(&rfds);
-
-		for (i = 0; i < interface_max_connections; i++) {
-			if (interfaces[i].fd >= 0
-			    && FD_ISSET(interfaces[i].fd, &rfds)) {
-				if (COMMAND_RETURN_KILL ==
-				    interfaceReadInput(&(interfaces[i]))) {
-					return COMMAND_RETURN_KILL;
-				}
-				interfaces[i].lastTime = time(NULL);
-			}
-			if (interfaces[i].fd >= 0
-			    && FD_ISSET(interfaces[i].fd, &wfds)) {
-				flushInterfaceBuffer(&interfaces[i]);
-				interfaces[i].lastTime = time(NULL);
-			}
-		}
-
-		break;
-	}
-
-	return 1;
-}
-
-void initInterfaces(void)
-{
-	unsigned int i;
-	char *test;
-	ConfigParam *param;
-
-	param = getConfigParam(CONF_CONN_TIMEOUT);
-
-	if (param) {
-		interface_timeout = strtol(param->value, &test, 10);
-		if (*test != '\0' || interface_timeout <= 0) {
-			FATAL("connection timeout \"%s\" is not a positive "
-			      "integer, line %i\n", CONF_CONN_TIMEOUT,
-			      param->line);
-		}
-	}
-
-	param = getConfigParam(CONF_MAX_CONN);
-
-	if (param) {
-		interface_max_connections = strtol(param->value, &test, 10);
-		if (*test != '\0' || interface_max_connections <= 0) {
-			FATAL("max connections \"%s\" is not a positive integer"
-			      ", line %i\n", param->value, param->line);
-		}
-	} else
-		interface_max_connections = INTERFACE_MAX_CONNECTIONS_DEFAULT;
-
-	param = getConfigParam(CONF_MAX_COMMAND_LIST_SIZE);
-
-	if (param) {
-		long tmp = strtol(param->value, &test, 10);
-		if (*test != '\0' || tmp <= 0) {
-			FATAL("max command list size \"%s\" is not a positive "
-			      "integer, line %i\n", param->value, param->line);
-		}
-		interface_max_command_list_size = tmp * 1024;
-	}
-
-	param = getConfigParam(CONF_MAX_OUTPUT_BUFFER_SIZE);
-
-	if (param) {
-		long tmp = strtol(param->value, &test, 10);
-		if (*test != '\0' || tmp <= 0) {
-			FATAL("max output buffer size \"%s\" is not a positive "
-			      "integer, line %i\n", param->value, param->line);
-		}
-		interface_max_output_buffer_size = tmp * 1024;
-	}
-
-	interfaces = xmalloc(sizeof(Interface) * interface_max_connections);
-
-	list_cache = xcalloc(interface_list_cache_size, sizeof(struct strnode));
-	list_cache_head = &(list_cache[0]);
-	list_cache_tail = &(list_cache[interface_list_cache_size - 1]);
-
-	for (i = 0; i < interface_max_connections; i++) {
-		interfaces[i].fd = -1;
-		interfaces[i].send_buf = NULL;
-		interfaces[i].send_buf_size = 0;
-		interfaces[i].send_buf_alloc = 0;
-		interfaces[i].num = i;
-	}
-}
-
-static void closeAllInterfaces(void)
-{
-	unsigned int i;
-
-	for (i = 0; i < interface_max_connections; i++) {
-		if (interfaces[i].fd >= 0)
-			closeInterface(&(interfaces[i]));
-		if (interfaces[i].send_buf)
-			free(interfaces[i].send_buf);
-	}
-	free(list_cache);
-}
-
-void freeAllInterfaces(void)
-{
-	closeAllInterfaces();
-
-	free(interfaces);
-
-	interface_max_connections = 0;
-}
-
-void closeOldInterfaces(void)
-{
-	unsigned int i;
-
-	for (i = 0; i < interface_max_connections; i++) {
-		if (interfaces[i].fd >= 0) {
-			if (interfaces[i].expired) {
-				DEBUG("interface %i: expired\n", i);
-				closeInterface(&(interfaces[i]));
-			} else if (time(NULL) - interfaces[i].lastTime >
-				   interface_timeout) {
-				DEBUG("interface %i: timeout\n", i);
-				closeInterface(&(interfaces[i]));
-			}
-		}
-	}
-}
-
-static void flushInterfaceBuffer(Interface * interface)
-{
-	struct sllnode *buf;
-	ssize_t ret = 0;
-
-	buf = interface->deferred_send;
-	while (buf) {
-		ret = write(interface->fd, buf->data, buf->size);
-		if (ret < 0)
-			break;
-		else if ((size_t)ret < buf->size) {
-			assert(interface->deferred_bytes >= (size_t)ret);
-			interface->deferred_bytes -= ret;
-			buf->data = (char *)buf->data + ret;
-			buf->size -= ret;
-		} else {
-			struct sllnode *tmp = buf;
-			size_t decr = (buf->size + sizeof(struct sllnode));
-
-			assert(interface->deferred_bytes >= decr);
-			interface->deferred_bytes -= decr;
-			buf = buf->next;
-			free(tmp);
-			interface->deferred_send = buf;
-		}
-		interface->lastTime = time(NULL);
-	}
-
-	if (!interface->deferred_send) {
-		DEBUG("interface %i: buffer empty %lu\n", interface->num,
-		      (unsigned long)interface->deferred_bytes);
-		assert(interface->deferred_bytes == 0);
-	} else if (ret < 0 && errno != EAGAIN && errno != EINTR) {
-		/* cause interface to close */
-		DEBUG("interface %i: problems flushing buffer\n",
-		      interface->num);
-		buf = interface->deferred_send;
-		do {
-			struct sllnode *prev = buf;
-			buf = buf->next;
-			free(prev);
-		} while (buf);
-		interface->deferred_send = NULL;
-		interface->deferred_bytes = 0;
-		interface->expired = 1;
-	}
-}
-
-int interfacePrintWithFD(int fd, const char *buffer, size_t buflen)
-{
-	static unsigned int i;
-	size_t copylen;
-	Interface *interface;
-
-	assert(fd >= 0);
-
-	if (i >= interface_max_connections ||
-	    interfaces[i].fd < 0 || interfaces[i].fd != fd) {
-		for (i = 0; i < interface_max_connections; i++) {
-			if (interfaces[i].fd == fd)
-				break;
-		}
-		if (i == interface_max_connections)
-			return -1;
-	}
-
-	/* if fd isn't found or interfaces is going to be closed, do nothing */
-	if (interfaces[i].expired)
-		return 0;
-
-	interface = interfaces + i;
-
-	while (buflen > 0 && !interface->expired) {
-		size_t left;
-
-		assert(interface->send_buf_size >= interface->send_buf_used);
-		left = interface->send_buf_size - interface->send_buf_used;
-
-		copylen = buflen > left ? left : buflen;
-		memcpy(interface->send_buf + interface->send_buf_used, buffer,
-		       copylen);
-		buflen -= copylen;
-		interface->send_buf_used += copylen;
-		buffer += copylen;
-		if (interface->send_buf_used >= interface->send_buf_size)
-			printInterfaceOutBuffer(interface);
-	}
-
-	return 0;
-}
-
-static void printInterfaceOutBuffer(Interface * interface)
-{
-	ssize_t ret;
-	struct sllnode *buf;
-
-	if (interface->fd < 0 || interface->expired ||
-	    !interface->send_buf_used)
-		return;
-
-	if ((buf = interface->deferred_send)) {
-		interface->deferred_bytes += sizeof(struct sllnode)
-		                             + interface->send_buf_used;
-		if (interface->deferred_bytes >
-		    interface_max_output_buffer_size) {
-			ERROR("interface %i: output buffer size (%lu) is "
-			      "larger than the max (%lu)\n",
-			      interface->num,
-			      (unsigned long)interface->deferred_bytes,
-			      (unsigned long)interface_max_output_buffer_size);
-			/* cause interface to close */
-			interface->expired = 1;
-			do {
-				struct sllnode *prev = buf;
-				buf = buf->next;
-				free(prev);
-			} while (buf);
-			interface->deferred_send = NULL;
-			interface->deferred_bytes = 0;
-		} else {
-			while (buf->next)
-				buf = buf->next;
-			buf->next = new_sllnode(interface->send_buf,
-						interface->send_buf_used);
-		}
-	} else {
-		if ((ret = write(interface->fd, interface->send_buf,
-				 interface->send_buf_used)) < 0) {
-			if (errno == EAGAIN || errno == EINTR) {
-				interface->deferred_send =
-				    new_sllnode(interface->send_buf,
-						interface->send_buf_used);
-			} else {
-				DEBUG("interface %i: problems writing\n",
-				      interface->num);
-				interface->expired = 1;
-				return;
-			}
-		} else if ((size_t)ret < interface->send_buf_used) {
-			interface->deferred_send =
-			    new_sllnode(interface->send_buf + ret,
-					interface->send_buf_used - ret);
-		}
-		if (interface->deferred_send) {
-			DEBUG("interface %i: buffer created\n", interface->num);
-			interface->deferred_bytes =
-			    interface->deferred_send->size
-			    + sizeof(struct sllnode);
-		}
-	}
-
-	interface->send_buf_used = 0;
-}
-