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Merged
m-tthw merged 2 commits into from
Dec 12, 2024
Merged

Send psn #3

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58beaaa
cleanup unused vars
m-tthw Dec 12, 2024
3b30363
update docstring
m-tthw Dec 12, 2024
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17 changes: 3 additions & 14 deletions pypsn/__init__.py
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Original file line number Diff line number Diff line change
Expand Up @@ -656,11 +656,9 @@ def prepare_psn_data_packet_bytes(data_packet: PsnDataPacket):

def send_psn_packet(
psn_packet,
iface_name="",
iface_ip="127.0.0.1",
port=56565,
mcast_grp="236.10.10.10",
transmit_block_size=9216,
time_to_live=31,
):
"""Send psn packet.
Expand All @@ -672,33 +670,24 @@ def send_psn_packet(

Args:
psn_packet (bytes): Use binary/bytes, not text/strings for data
iface_name (str, optional): local interface name
iface_ip (str, optional): local interface ip. Default: 127.0.0.1
port (int, optional): udp port. Default: 56565
mcast_ip (str, optional): multicastip. Default: "236.10.10.10"
transmit_block_size (int, optional): max udp packet (65535) -
udp header (8) - ip header (20) = 65507. Defaults to 65507.
time_to_live (int, optional): time to live (TTL) of sent
packets. Defaults to 31 (maximum recommended for local network).

Raises:
AttributeError
"""

if not iface_name:
iface_name = socket.inet_ntoa(pack("i", socket.INADDR_ANY))

output_socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM, socket.IPPROTO_UDP)
output_socket.setsockopt(socket.IPPROTO_IP, socket.IP_MULTICAST_TTL, time_to_live)

if mcast_grp:
ip_addr = mcast_grp

if sys.platform == "win32":
mreq = struct.pack(
"4s4s", socket.inet_aton(mcast_grp), socket.inet_aton(iface_ip)
ip_mreq = socket.inet_aton(mcast_grp) + socket.inet_aton(iface_ip)
output_socket.setsockopt(
socket.IPPROTO_IP, socket.IP_ADD_MEMBERSHIP, ip_mreq
)
output_socket.setsockopt(socket.IPPROTO_IP, socket.IP_ADD_MEMBERSHIP, mreq)

# disable Path MTU Discovery (PMTUD) as it doesn't address multicast
# and silently drops any IP packets > a remote network's MTU
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