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-rw-r--r--daemon/client.c12
-rw-r--r--daemon/client.h4
-rw-r--r--daemon/device.c38
-rw-r--r--daemon/device.h2
4 files changed, 35 insertions, 21 deletions
diff --git a/daemon/client.c b/daemon/client.c
index 5498586..4f44bcc 100644
--- a/daemon/client.c
+++ b/daemon/client.c
@@ -52,11 +52,11 @@ enum client_state {
struct mux_client {
int fd;
unsigned char *ob_buf;
- int ob_size;
- int ob_capacity;
+ uint32_t ob_size;
+ uint32_t ob_capacity;
unsigned char *ib_buf;
- int ib_size;
- int ib_capacity;
+ uint32_t ib_size;
+ uint32_t ib_capacity;
short events, devents;
uint32_t connect_tag;
int connect_device;
@@ -65,7 +65,7 @@ struct mux_client {
static struct collection client_list;
-int client_read(struct mux_client *client, void *buffer, int len)
+int client_read(struct mux_client *client, void *buffer, uint32_t len)
{
usbmuxd_log(LL_SPEW, "client_read fd %d buf %p len %d", client->fd, buffer, len);
if(client->state != CLIENT_CONNECTED) {
@@ -75,7 +75,7 @@ int client_read(struct mux_client *client, void *buffer, int len)
return recv(client->fd, buffer, len, 0);
}
-int client_write(struct mux_client *client, void *buffer, int len)
+int client_write(struct mux_client *client, void *buffer, uint32_t len)
{
usbmuxd_log(LL_SPEW, "client_write fd %d buf %p len %d", client->fd, buffer, len);
if(client->state != CLIENT_CONNECTED) {
diff --git a/daemon/client.h b/daemon/client.h
index 444fe15..60d8348 100644
--- a/daemon/client.h
+++ b/daemon/client.h
@@ -28,8 +28,8 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
struct device_info;
struct mux_client;
-int client_read(struct mux_client *client, void *buffer, int len);
-int client_write(struct mux_client *client, void *buffer, int len);
+int client_read(struct mux_client *client, void *buffer, uint32_t len);
+int client_write(struct mux_client *client, void *buffer, uint32_t len);
int client_set_events(struct mux_client *client, short events);
void client_close(struct mux_client *client);
int client_notify_connect(struct mux_client *client, enum usbmuxd_result result);
diff --git a/daemon/device.c b/daemon/device.c
index 7cda462..759cb91 100644
--- a/daemon/device.c
+++ b/daemon/device.c
@@ -38,7 +38,7 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
int next_device_id;
-#define DEV_PKTBUF_SIZE 65536
+#define DEV_MRU 65536
#define CONN_INBUF_SIZE 262144
#define CONN_OUTBUF_SIZE 65536
@@ -90,13 +90,13 @@ struct mux_connection
uint32_t tx_seq, tx_ack, tx_acked, tx_win;
uint32_t rx_seq, rx_recvd, rx_ack, rx_win;
int max_payload;
- int sendable;
+ uint32_t sendable;
int flags;
unsigned char *ib_buf;
- int ib_size;
- int ib_capacity;
+ uint32_t ib_size;
+ uint32_t ib_capacity;
unsigned char *ob_buf;
- int ob_capacity;
+ uint32_t ob_capacity;
short events;
uint64_t last_ack_time;
};
@@ -109,7 +109,7 @@ struct mux_device
struct collection connections;
uint16_t next_sport;
unsigned char *pktbuf;
- int pktlen;
+ uint32_t pktlen;
};
static struct collection device_list;
@@ -404,7 +404,7 @@ void device_client_process(int device_id, struct mux_client *client, short event
update_connection(conn);
}
-static void connection_device_input(struct mux_connection *conn, unsigned char *payload, int payload_length)
+static void connection_device_input(struct mux_connection *conn, unsigned char *payload, uint32_t payload_length)
{
if((conn->ib_size + payload_length) > conn->ib_capacity) {
usbmuxd_log(LL_ERROR, "Input buffer overflow on device %d connection %d->%d (space=%d, payload=%d)", conn->dev->id, conn->sport, conn->dport, conn->ib_capacity-conn->ib_size, payload_length);
@@ -459,7 +459,7 @@ static void device_version_input(struct mux_device *dev, struct version_header *
client_device_add(&info);
}
-static void device_tcp_input(struct mux_device *dev, struct tcphdr *th, unsigned char *payload, int payload_length)
+static void device_tcp_input(struct mux_device *dev, struct tcphdr *th, unsigned char *payload, uint32_t payload_length)
{
usbmuxd_log(LL_DEBUG, "[IN] dev=%d sport=%d dport=%d seq=%d ack=%d flags=0x%x window=%d[%d] len=%d",
dev->id, ntohs(th->th_sport), ntohs(th->th_dport), ntohl(th->th_seq), ntohl(th->th_ack), th->th_flags, ntohs(th->th_win) << 8, ntohs(th->th_win), payload_length);
@@ -531,7 +531,7 @@ static void device_tcp_input(struct mux_device *dev, struct tcphdr *th, unsigned
}
}
-void device_data_input(struct usb_device *usbdev, unsigned char *buffer, int length)
+void device_data_input(struct usb_device *usbdev, unsigned char *buffer, uint32_t length)
{
struct mux_device *dev = NULL;
FOREACH(struct mux_device *tdev, &device_list) {
@@ -548,11 +548,17 @@ void device_data_input(struct usb_device *usbdev, unsigned char *buffer, int len
if(!length)
return;
+ // sanity check (should never happen with current USB implementation)
+ if((length > USB_MRU) || (length > DEV_MRU)) {
+ usbmuxd_log(LL_ERROR, "Too much data received from USB (%d), file a bug", length);
+ return;
+ }
+
usbmuxd_log(LL_SPEW, "Mux data input for device %p: %p len %d", dev, buffer, length);
// handle broken up transfers
if(dev->pktlen) {
- if((length + dev->pktlen) > DEV_PKTBUF_SIZE) {
+ if((length + dev->pktlen) > DEV_MRU) {
usbmuxd_log(LL_ERROR, "Incoming split packet is too large (%d so far), dropping!", length + dev->pktlen);
dev->pktlen = 0;
return;
@@ -588,13 +594,21 @@ void device_data_input(struct usb_device *usbdev, unsigned char *buffer, int len
struct tcphdr *th;
unsigned char *payload;
- int payload_length;
+ uint32_t payload_length;
switch(ntohl(mhdr->protocol)) {
case MUX_PROTO_VERSION:
+ if(length < (sizeof(struct mux_header) + sizeof(struct version_header))) {
+ usbmuxd_log(LL_ERROR, "Incoming version packet is too small (%d)", length);
+ return;
+ }
device_version_input(dev, (struct version_header *)(mhdr+1));
break;
case MUX_PROTO_TCP:
+ if(length < (sizeof(struct mux_header) + sizeof(struct tcphdr))) {
+ usbmuxd_log(LL_ERROR, "Incoming TCP packet is too small (%d)", length);
+ return;
+ }
th = (struct tcphdr *)(mhdr+1);
payload = (unsigned char *)(th+1);
payload_length = length - sizeof(struct tcphdr) - sizeof(struct mux_header);
@@ -618,7 +632,7 @@ int device_add(struct usb_device *usbdev)
dev->usbdev = usbdev;
dev->state = MUXDEV_INIT;
dev->next_sport = 1;
- dev->pktbuf = malloc(DEV_PKTBUF_SIZE);
+ dev->pktbuf = malloc(DEV_MRU);
dev->pktlen = 0;
struct version_header vh;
vh.major = htonl(1);
diff --git a/daemon/device.h b/daemon/device.h
index 4bf9752..ea77069 100644
--- a/daemon/device.h
+++ b/daemon/device.h
@@ -31,7 +31,7 @@ struct device_info {
uint16_t pid;
};
-void device_data_input(struct usb_device *dev, unsigned char *buf, int length);
+void device_data_input(struct usb_device *dev, unsigned char *buf, uint32_t length);
int device_add(struct usb_device *dev);
void device_remove(struct usb_device *dev);
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