use size_t

When dealing with in-memory lengths, the standard type "size_t" should
be used.  Missing one can be quite dangerous, because an attacker
could provoke an integer under-/overflow, which may provide an attack
vector.

git-svn-id: https://svn.musicpd.org/mpd/trunk@7205 09075e82-0dd4-0310-85a5-a0d7c8717e4f

9 files changed, 57 insertions, 58 deletions

diff --git a/src/inputStream_http.c b/src/inputStream_http.c
index c5dccf9dd..9e9bbc921 100644
--- a/src/inputStream_http.c
+++ b/src/inputStream_http.c
@@ -40,8 +40,8 @@ static char *proxyHost;
 static char *proxyPort;
 static char *proxyUser;
 static char *proxyPassword;
-static int bufferSize = HTTP_BUFFER_SIZE_DEFAULT;
-static int prebufferSize = HTTP_PREBUFFER_SIZE_DEFAULT;
+static size_t bufferSize = HTTP_BUFFER_SIZE_DEFAULT;
+static size_t prebufferSize = HTTP_PREBUFFER_SIZE_DEFAULT;
 
 typedef struct _InputStreemHTTPData {
 	char *host;
@@ -52,9 +52,9 @@ typedef struct _InputStreemHTTPData {
 	char *buffer;
 	size_t buflen;
 	int timesRedirected;
-	int icyMetaint;
+	size_t icyMetaint;
 	int prebuffer;
-	int icyOffset;
+	size_t icyOffset;
 	char *proxyAuth;
 	char *httpAuth;
     /* Number of times mpd tried to get data */
@@ -113,9 +113,9 @@ void inputStream_initHttp(void)
 	param = getConfigParam(CONF_HTTP_BUFFER_SIZE);
 
 	if (param) {
-		bufferSize = strtol(param->value, &test, 10);
+		bufferSize = strtoul(param->value, &test, 10);
 
-		if (bufferSize <= 0 || *test != '\0') {
+		if (*test != '\0') {
 			FATAL("\"%s\" specified for %s at line %i is not a "
 			      "positive integer\n",
 			      param->value, CONF_HTTP_BUFFER_SIZE, param->line);
@@ -130,7 +130,7 @@ void inputStream_initHttp(void)
 	param = getConfigParam(CONF_HTTP_PREBUFFER_SIZE);
 
 	if (param) {
-		prebufferSize = strtol(param->value, &test, 10);
+		prebufferSize = strtoul(param->value, &test, 10);
 
 		if (prebufferSize <= 0 || *test != '\0') {
 			FATAL("\"%s\" specified for %s at line %i is not a "
@@ -430,7 +430,8 @@ static int finishHTTPInit(InputStream * inStream)
 	int error;
 	socklen_t error_len = sizeof(int);
 	int ret;
-	int length;
+	size_t length;
+	ssize_t nbytes;
 	char request[2048];
 
 	tv.tv_sec = 0;
@@ -456,7 +457,7 @@ static int finishHTTPInit(InputStream * inStream)
 		goto close_err;
 
 	/* deal with ICY metadata later, for now its fucking up stuff! */
-	length = snprintf(request, sizeof(request),
+	length = (size_t)snprintf(request, sizeof(request),
 	                 "GET %s HTTP/1.1\r\n"
 	                 "Host: %s\r\n"
 	                 "Connection: close\r\n"
@@ -473,8 +474,8 @@ static int finishHTTPInit(InputStream * inStream)
 
 	if (length >= sizeof(request))
 		goto close_err;
-	ret = write(data->sock, request, length);
-	if (ret != length)
+	nbytes = write(data->sock, request, length);
+	if (nbytes < 0 || (size_t)nbytes != length)
 		goto close_err;
 
 	data->connState = HTTP_CONN_STATE_HELLO;
@@ -607,7 +608,7 @@ static int getHTTPHello(InputStream * inStream)
 			if (!inStream->size)
 				inStream->size = atol(cur + 18);
 		} else if (0 == strncasecmp(cur, "\r\nicy-metaint:", 14)) {
-			data->icyMetaint = atoi(cur + 14);
+			data->icyMetaint = strtoul(cur + 14, NULL, 0);
 		} else if (0 == strncasecmp(cur, "\r\nicy-name:", 11) ||
 			   0 == strncasecmp(cur, "\r\nice-name:", 11)) {
 			int incr = 11;
@@ -753,9 +754,9 @@ size_t inputStream_httpRead(InputStream * inStream, void *ptr, size_t size,
 			    size_t nmemb)
 {
 	InputStreamHTTPData *data = (InputStreamHTTPData *) inStream->data;
-	long tosend = 0;
-	long inlen = size * nmemb;
-	long maxToSend = data->buflen;
+	size_t tosend = 0;
+	size_t inlen = size * nmemb;
+	size_t maxToSend = data->buflen;
 
 	inputStream_httpBuffer(inStream);
 
@@ -774,10 +775,8 @@ size_t inputStream_httpRead(InputStream * inStream, void *ptr, size_t size,
 
 	if (data->icyMetaint > 0) {
 		if (data->icyOffset >= data->icyMetaint) {
-			int metalen = *(data->buffer);
+			size_t metalen = *(data->buffer);
 			metalen <<= 4;
-			if (metalen < 0)
-				metalen = 0;
 			if (metalen + 1 > data->buflen) {
 				/* damn that's some fucking big metadata! */
 				if (bufferSize < metalen + 1) {
@@ -879,7 +878,7 @@ int inputStream_httpBuffer(InputStream * inStream)
 	if (data->connState == HTTP_CONN_STATE_OPEN &&
 	    data->buflen < bufferSize - 1) {
 		readed = read(data->sock, data->buffer + data->buflen,
-			      (size_t) (bufferSize - 1 - data->buflen));
+			      bufferSize - 1 - data->buflen);
         /* If the connection is currently unavailable, or interrupted (EINTR)
          * Don't give an error, so it's retried later.
          * Max times in a row to re-try this is HTTP_MAX_TRIES
diff --git a/src/interface.c b/src/interface.c
index 9a79f102e..029025cbf 100644
--- a/src/interface.c
+++ b/src/interface.c
@@ -59,26 +59,26 @@ static struct strnode *list_cache_tail;
 
 typedef struct _Interface {
 	char buffer[INTERFACE_MAX_BUFFER_LENGTH];
-	int bufferLength;
-	int bufferPos;
+	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 */
-	int cmd_list_size;	/* mem cmd_list consumes */
+	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 */
-	int deferred_bytes;	/* mem deferred_send consumes */
+	size_t deferred_bytes;	/* mem deferred_send consumes */
 	int expired;	/* set whether this interface should be closed on next
 			   check of old interfaces */
 	int num;	/* interface number */
 
 	char *send_buf;
-	int send_buf_used;	/* bytes used this instance */
-	int send_buf_size;	/* bytes usable this instance */
-	int send_buf_alloc;	/* bytes actually allocated */
+	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;
@@ -88,7 +88,7 @@ static void flushInterfaceBuffer(Interface * interface);
 static void printInterfaceOutBuffer(Interface * interface);
 
 #ifdef SO_SNDBUF
-static int get_default_snd_buf_size(Interface * interface)
+static size_t get_default_snd_buf_size(Interface * interface)
 {
 	int new_size;
 	socklen_t sockOptLen = sizeof(int);
@@ -99,12 +99,12 @@ static int get_default_snd_buf_size(Interface * interface)
 		return INTERFACE_DEFAULT_OUT_BUFFER_SIZE;
 	}
 	if (new_size > 0)
-		return new_size;
+		return (size_t)new_size;
 	DEBUG("sockets send buffer size is not positive\n");
 	return INTERFACE_DEFAULT_OUT_BUFFER_SIZE;
 }
 #else /* !SO_SNDBUF */
-static int get_default_snd_buf_size(Interface * interface)
+static size_t get_default_snd_buf_size(Interface * interface)
 {
 	return INTERFACE_DEFAULT_OUT_BUFFER_SIZE;
 }
@@ -112,7 +112,7 @@ static int get_default_snd_buf_size(Interface * interface)
 
 static void set_send_buf_size(Interface * interface)
 {
-	int new_size = get_default_snd_buf_size(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 */
@@ -313,12 +313,12 @@ static int processLineOfInput(Interface * interface)
 			if (interface->cmd_list_size >
 			    interface_max_command_list_size) {
 				ERROR("interface %i: command "
-				      "list size (%i) is "
+				      "list size (%lu) is "
 				      "larger than the max "
-				      "(%li)\n",
+				      "(%lu)\n",
 				      interface->num,
-				      interface->cmd_list_size,
-				      (long)interface_max_command_list_size);
+				      (unsigned long)interface->cmd_list_size,
+				      (unsigned long)interface_max_command_list_size);
 				closeInterface(interface);
 				ret = COMMAND_RETURN_CLOSE;
 			} else
@@ -642,14 +642,14 @@ void closeOldInterfaces(void)
 static void flushInterfaceBuffer(Interface * interface)
 {
 	struct sllnode *buf;
-	int ret = 0;
+	ssize_t ret = 0;
 
 	buf = interface->deferred_send;
 	while (buf) {
 		ret = write(interface->fd, buf->data, buf->size);
 		if (ret < 0)
 			break;
-		else if (ret < buf->size) {
+		else if ((size_t)ret < buf->size) {
 			interface->deferred_bytes -= ret;
 			buf->data = (char *)buf->data + ret;
 			buf->size -= ret;
@@ -665,8 +665,8 @@ static void flushInterfaceBuffer(Interface * interface)
 	}
 
 	if (!interface->deferred_send) {
-		DEBUG("interface %i: buffer empty %i\n", interface->num,
-		      interface->deferred_bytes);
+		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 */
@@ -684,10 +684,10 @@ static void flushInterfaceBuffer(Interface * interface)
 	}
 }
 
-int interfacePrintWithFD(int fd, char *buffer, int buflen)
+int interfacePrintWithFD(int fd, char *buffer, size_t buflen)
 {
 	static int i;
-	int copylen;
+	size_t copylen;
 	Interface *interface;
 
 	assert(fd >= 0);
@@ -709,7 +709,7 @@ int interfacePrintWithFD(int fd, char *buffer, int buflen)
 	interface = interfaces + i;
 
 	while (buflen > 0 && !interface->expired) {
-		int left = interface->send_buf_size - interface->send_buf_used;
+		size_t left = interface->send_buf_size - interface->send_buf_used;
 		copylen = buflen > left ? left : buflen;
 		memcpy(interface->send_buf + interface->send_buf_used, buffer,
 		       copylen);
@@ -725,7 +725,7 @@ int interfacePrintWithFD(int fd, char *buffer, int buflen)
 
 static void printInterfaceOutBuffer(Interface * interface)
 {
-	int ret;
+	ssize_t ret;
 	struct sllnode *buf;
 
 	if (interface->fd < 0 || interface->expired ||
@@ -770,7 +770,7 @@ static void printInterfaceOutBuffer(Interface * interface)
 				interface->expired = 1;
 				return;
 			}
-		} else if (ret < interface->send_buf_used) {
+		} else if ((size_t)ret < interface->send_buf_used) {
 			interface->deferred_send =
 			    new_sllnode(interface->send_buf + ret,
 					interface->send_buf_used - ret);
diff --git a/src/interface.h b/src/interface.h
index 70ba424dc..389e47136 100644
--- a/src/interface.h
+++ b/src/interface.h
@@ -26,7 +26,7 @@ void initInterfaces(void);
 void openAInterface(int fd, struct sockaddr *addr);
 void freeAllInterfaces(void);
 void closeOldInterfaces(void);
-int interfacePrintWithFD(int fd, char *buffer, int len);
+int interfacePrintWithFD(int fd, char *buffer, size_t len);
 
 int doIOForInterfaces(void);
 
diff --git a/src/ls.c b/src/ls.c
index 53e4c330d..3032935c6 100644
--- a/src/ls.c
+++ b/src/ls.c
@@ -112,10 +112,10 @@ int lsPlaylists(int fd, const char *utf8path)
 	char *actualPath = rpp2app_r(path_max_tmp,
 	                             utf8_to_fs_charset(path_max_tmp,
 				                        utf8path));
-	int actlen = strlen(actualPath) + 1;
-	int maxlen = MPD_PATH_MAX - actlen;
-	int suflen = strlen(PLAYLIST_FILE_SUFFIX) + 1;
-	int suff;
+	size_t actlen = strlen(actualPath) + 1;
+	size_t maxlen = MPD_PATH_MAX - actlen;
+	size_t suflen = strlen(PLAYLIST_FILE_SUFFIX) + 1;
+	ssize_t suff;
 
 	if (actlen > MPD_PATH_MAX - 1 || (dir = opendir(actualPath)) == NULL) {
 		return 0;
@@ -131,7 +131,7 @@ int lsPlaylists(int fd, const char *utf8path)
 		duplicated = ent->d_name;
 		if (mpd_likely(len <= maxlen) &&
 		    duplicated[0] != '.' &&
-		    (suff = strlen(duplicated) - suflen) > 0 &&
+		    (suff = (ssize_t)(strlen(duplicated) - suflen)) > 0 &&
 		    duplicated[suff] == '.' &&
 		    strcmp(duplicated + suff + 1, PLAYLIST_FILE_SUFFIX) == 0) {
 			memcpy(s + actlen, ent->d_name, len);
diff --git a/src/myfprintf.c b/src/myfprintf.c
index fdea2b78f..2f8ea7723 100644
--- a/src/myfprintf.c
+++ b/src/myfprintf.c
@@ -30,7 +30,7 @@ static void blockingWrite(const int fd, const char *string, size_t len)
 {
 	while (len) {
 		ssize_t ret = xwrite(fd, string, len);
-		if (ret == len)
+		if (ret == (ssize_t)len)
 			return;
 		if (ret >= 0) {
 			len -= ret;
diff --git a/src/outputBuffer.c b/src/outputBuffer.c
index 04770b478..25325ecb7 100644
--- a/src/outputBuffer.c
+++ b/src/outputBuffer.c
@@ -66,7 +66,7 @@ void flushOutputBuffer(OutputBuffer * cb)
 
 int sendDataToOutputBuffer(OutputBuffer * cb, InputStream * inStream,
 			   DecoderControl * dc, int seekable, void *dataIn,
-			   long dataInLen, float data_time, mpd_uint16 bitRate,
+			   size_t dataInLen, float data_time, mpd_uint16 bitRate,
 			   ReplayGainInfo * replayGainInfo)
 {
 	mpd_uint16 dataToSend;
@@ -74,7 +74,7 @@ int sendDataToOutputBuffer(OutputBuffer * cb, InputStream * inStream,
 	char *data;
 	size_t datalen;
 	static char *convBuffer;
-	static long convBufferLen;
+	static size_t convBufferLen;
 
 	if (cmpAudioFormat(&(cb->audioFormat), &(dc->audioFormat)) == 0) {
 		data = dataIn;
diff --git a/src/outputBuffer.h b/src/outputBuffer.h
index f690941d4..150748328 100644
--- a/src/outputBuffer.h
+++ b/src/outputBuffer.h
@@ -58,7 +58,7 @@ int sendDataToOutputBuffer(OutputBuffer * cb,
 			   DecoderControl * dc,
 			   int seekable,
 			   void *data,
-			   long datalen,
+			   size_t datalen,
 			   float time,
 			   mpd_uint16 bitRate, ReplayGainInfo * replayGainInfo);
 
diff --git a/src/pcm_utils.c b/src/pcm_utils.c
index d11d4d42f..be32729f0 100644
--- a/src/pcm_utils.c
+++ b/src/pcm_utils.c
@@ -359,7 +359,7 @@ static char *pcm_convertTo16bit(mpd_sint8 bits, char *inBuffer, size_t inSize,
 	char *outBuffer = NULL;
 	mpd_sint8 *in;
 	mpd_sint16 *out;
-	int i;
+	size_t i;
 
 	switch (bits) {
 	case 8:
diff --git a/src/tag.c b/src/tag.c
index b3645e007..eb971ecdc 100644
--- a/src/tag.c
+++ b/src/tag.c
@@ -466,8 +466,8 @@ MpdTag *apeDup(char *file)
 	int tagCount;
 	char *buffer = NULL;
 	char *p;
-	int tagLen;
-	int size;
+	size_t tagLen;
+	size_t size;
 	unsigned long flags;
 	int i;
 	char *key;
@@ -508,7 +508,7 @@ MpdTag *apeDup(char *file)
 	/* determine if file has an apeV2 tag */
 	if (fseek(fp, 0, SEEK_END))
 		goto fail;
-	size = ftell(fp);
+	size = (size_t)ftell(fp);
 	if (fseek(fp, size - sizeof(footer), SEEK_SET))
 		goto fail;
 	if (fread(&footer, 1, sizeof(footer), fp) != sizeof(footer))
@@ -554,7 +554,7 @@ MpdTag *apeDup(char *file)
 		tagLen--;
 
 		/* get the value */
-		if (tagLen - size < 0)
+		if (tagLen < size)
 			goto fail;
 
 		/* we only care about utf-8 text tags */