r0 = socket$inet6_udp(0xa, 0x2, 0x0)
setsockopt$inet6_opts(r0, 0x29, 0x3b, &(0x7f00000000c0)=@srh, 0x8)
sendmmsg$inet6(r0, &(0x7f0000000880)=[{{&(0x7f0000000040)={0xa, 0x4e21, 0x0, @local}, 0x1c, 0x0}}], 0x1, 0x0)