Hi Oliver, On Sat, Mar 02, 2024 at 01:19:42PM -0500, Oliver Crumrine wrote: > It was not made clear in several socket options that they were not > supported by SOCK_STREAM; this patch fixes that. > > Socket options not supported by SOCK_STREAM are handled in the > ip_cmsg_recv_offset function in net/ipv4/ip_sockglue.c. The function is > called for udp sockets, and indirectly by ping and raw sockets, but not > for TCP sockets, as they don't support these options. > > Signed-off-by: Oliver Crumrine <ozlinuxc@xxxxxxxxx> Could you write some small example programs demonstrating that these are not supported? I'd like to check it with a small program, if possible. Have a lovely say! Alex > --- > man7/ip.7 | 9 +++++++++ > 1 file changed, 9 insertions(+) > > diff --git a/man7/ip.7 b/man7/ip.7 > index 2b4b06324..104e65feb 100644 > --- a/man7/ip.7 > +++ b/man7/ip.7 > @@ -828,6 +828,9 @@ is not zero, the primary local address of the interface specified by the > index overwrites > .I ipi_spec_dst > for the routing table lookup. > +Not supported for > +.B SOCK_STREAM > +sockets. > .TP > .BR IP_RECVERR " (since Linux 2.2)" > .\" Precisely: since Linux 2.1.15 > @@ -989,6 +992,9 @@ in which the kernel returns the original destination address > of the datagram being received. > The ancillary message contains a > .IR "struct sockaddr_in" . > +Not supported for > +.B SOCK_STREAM > +sockets. > .TP > .BR IP_RECVTOS " (since Linux 2.2)" > .\" Precisely: since Linux 2.1.68 > @@ -998,6 +1004,9 @@ ancillary message is passed with incoming packets. > It contains a byte which specifies the Type of Service/Precedence > field of the packet header. > Expects a boolean integer flag. > +Not supported for > +.B SOCK_STREAM > +sockets. > .TP > .BR IP_RECVTTL " (since Linux 2.2)" > .\" Precisely: since Linux 2.1.68 > -- > 2.44.0 > -- <https://www.alejandro-colomar.es/> Looking for a remote C programming job at the moment.
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