auracaster/bumble_mirror
3
0
Fork 1
mirror of https://github.com/google/bumble.git synced 2026-04-18 00:45:32 +00:00
Code Issues Packages Projects Releases Wiki Activity

Formatted with

Browse Source
This commit is contained in:
Frieder Steinmetz
2026-01-15 10:50:33 +01:00
parent 3fdd7ee45e
commit f95b2054c8
1 changed files with 26 additions and 19 deletions
Download Patch File Download Diff File Expand all files Collapse all files

39
bumble/snoop.py
View File

@@ -116,21 +116,26 @@ class PcapSnooper(Snooper):
Snooper that saves or streames HCI packets using the PCAP format.
"""
PCAP_MAGIC = 0xa1b2c3d4
PCAP_MAGIC = 0xA1B2C3D4
DLT_BLUETOOTH_HCI_H4_WITH_PHDR = 201
def __init__(self, fifo):
self.output = fifo
# Write the header
self.output.write(struct.pack("<IHHIIII",
self.PCAP_MAGIC,
2, 4, # Major and Minor PCAP Version
0, 0, # Reserved 1 and 2
65535, # SnapLen
# FCS and f are set to 0 implicitly by the next line
self.DLT_BLUETOOTH_HCI_H4_WITH_PHDR # The DLT in this PCAP
))
self.output.write(
struct.pack(
"<IHHIIII",
self.PCAP_MAGIC,
2,
4, # Major and Minor PCAP Version
0,
0, # Reserved 1 and 2
65535, # SnapLen
# FCS and f are set to 0 implicitly by the next line
self.DLT_BLUETOOTH_HCI_H4_WITH_PHDR, # The DLT in this PCAP
)
)
def snoop(self, hci_packet: bytes, direction: Snooper.Direction):
now = datetime.datetime.now(datetime.timezone.utc)
@@ -139,16 +144,18 @@ class PcapSnooper(Snooper):
# Emit the record
self.output.write(
struct.pack("<IIII",
sec, # Timestamp (Seconds)
usec, # Timestamp (Microseconds)
len(hci_packet)+4,
len(hci_packet)+4 # +4 because of the addtional direction info...
struct.pack(
"<IIII",
sec, # Timestamp (Seconds)
usec, # Timestamp (Microseconds)
len(hci_packet) + 4,
len(hci_packet) + 4, # +4 because of the addtional direction info...
)
+ struct.pack(">I", int(direction)) # ...thats being added here
+ struct.pack(">I", int(direction)) # ...thats being added here
+ hci_packet
)
self.output.flush() # flush after every packet for live logging
self.output.flush() # flush after every packet for live logging
# -----------------------------------------------------------------------------
_SNOOPER_INSTANCE_COUNT = 0