Actully We can not set two options at the same time. Old code: setsockopt(s, SOL_SOCKET, SO_REUSEADDR | SO_REUSEPORT, &opt, sizeof(opt))
If you use strace to trace sys call, you will find only SO_REUSEPORT is set: >setsockopt(3, SOL_SOCKET, SO_REUSEPORT, [1], 4) = 0 This is because SD_REUSEADDR is 2(0x0010) and SR_REUSEPORT is 15(0x1111) defined in /usr/include/asm-generic/socket.h in X86-64 platform. We need to set them one by one. In other platforms, if you set mutli options at the same time, you may encounter error "setsockopt: Protocol not available". Refer to https://stackoverflow.com/questions/58599070/socket-programming-setsockopt-protocol-not-available Signed-off-by: Tony He <huangy...@gmail.com> --- tests/ovpn-cli.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/tests/ovpn-cli.c b/tests/ovpn-cli.c index c1cf3b4..68d28b4 100644 --- a/tests/ovpn-cli.c +++ b/tests/ovpn-cli.c @@ -426,9 +426,14 @@ static int ovpn_socket(struct ovpn_ctx *ctx, sa_family_t family, int proto) } int opt = 1; - ret = setsockopt(s, SOL_SOCKET, SO_REUSEADDR | SO_REUSEPORT, &opt, sizeof(opt)); + ret = setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)); if (ret < 0) { - perror("setsockopt"); + perror("setsockopt for SO_REUSEADDR"); + return ret; + } + ret = setsockopt(s, SOL_SOCKET, SO_REUSEPORT, &opt, sizeof(opt)); + if (ret < 0) { + perror("setsockopt for SO_REUSEPORT"); return ret; } -- 2.17.1 _______________________________________________ Openvpn-devel mailing list Openvpn-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/openvpn-devel
