diff options
| -rw-r--r-- | usbmuxd/device.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/usbmuxd/device.c b/usbmuxd/device.c index 9296ea2..cddf718 100644 --- a/usbmuxd/device.c +++ b/usbmuxd/device.c @@ -198,6 +198,22 @@ static uint16_t find_sport(struct mux_device *dev) } } +static int send_anon_rst(struct mux_device *dev, uint16_t sport, uint16_t dport, uint32_t ack) +{ + struct tcphdr th; + memset(&th, 0, sizeof(th)); + th.th_sport = htons(sport); + th.th_dport = htons(dport); + th.th_ack = htonl(ack); + th.th_flags = TH_RST; + th.th_off = sizeof(th) / 4; + + usbmuxd_log(LL_DEBUG, "[OUT] dev=%d sport=%d dport=%d flags=0x%x", dev->id, sport, dport, th.th_flags); + + int res = send_packet(dev, MUX_PROTO_TCP, &th, NULL, 0); + return res; +} + static int send_tcp(struct mux_connection *conn, uint8_t flags, const unsigned char *data, int length) { struct tcphdr th; @@ -460,6 +476,10 @@ static void device_tcp_input(struct mux_device *dev, struct tcphdr *th, unsigned if(!conn) { usbmuxd_log(LL_WARNING, "No connection for device %d incoming packet %d->%d", dev->id, dport, sport); + if(!(th->th_flags & TH_RST)) { + if(send_anon_rst(dev, sport, dport, ntohl(th->th_seq)) < 0) + usbmuxd_log(LL_ERROR, "Error sending TCP RST to device %d (%d->%d)", conn->dev->id, sport, dport); + } return; } |