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author | Andreas Schultz <[email protected]> | 2017-02-02 11:17:17 +0100 |
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committer | Andreas Schultz <[email protected]> | 2017-04-20 16:11:12 +0200 |
commit | 308841d8c99907a364d6876ed9375507153729eb (patch) | |
tree | 99888ddbcf41f5452da392677b396958d46fa48e /lib/kernel/test/inet_SUITE.erl | |
parent | 8caa54fc05e381a3d321cd48770e48853ddb177a (diff) | |
download | otp-308841d8c99907a364d6876ed9375507153729eb.tar.gz otp-308841d8c99907a364d6876ed9375507153729eb.tar.bz2 otp-308841d8c99907a364d6876ed9375507153729eb.zip |
implement SO_BINDTODEVICE for inet protocols
bind to device is needed to properly support VRF-Lite under
Linux (see [1] for details).
[1]: https://www.kernel.org/doc/Documentation/networking/vrf.txt
Diffstat (limited to 'lib/kernel/test/inet_SUITE.erl')
-rw-r--r-- | lib/kernel/test/inet_SUITE.erl | 70 |
1 files changed, 68 insertions, 2 deletions
diff --git a/lib/kernel/test/inet_SUITE.erl b/lib/kernel/test/inet_SUITE.erl index f60c13d2e3..86f6b95fb9 100644 --- a/lib/kernel/test/inet_SUITE.erl +++ b/lib/kernel/test/inet_SUITE.erl @@ -40,7 +40,8 @@ lookup_bad_search_option/1, getif/1, getif_ifr_name_overflow/1,getservbyname_overflow/1, getifaddrs/1, - parse_strict_address/1, simple_netns/1, simple_netns_open/1]). + parse_strict_address/1, simple_netns/1, simple_netns_open/1, + simple_bind_to_device/1, simple_bind_to_device_open/1]). -export([get_hosts/1, get_ipv6_hosts/1, parse_hosts/1, parse_address/1, kill_gethost/0, parallell_gethost/0, test_netns/0]). @@ -58,7 +59,8 @@ all() -> gethostnative_debug_level, gethostnative_soft_restart, lookup_bad_search_option, getif, getif_ifr_name_overflow, getservbyname_overflow, - getifaddrs, parse_strict_address, simple_netns, simple_netns_open]. + getifaddrs, parse_strict_address, simple_netns, simple_netns_open, + simple_bind_to_device, simple_bind_to_device_open]. groups() -> [{parse, [], [parse_hosts, parse_address]}]. @@ -1247,3 +1249,67 @@ cmd(CmdString) -> io:put_chars(["# ",CmdString,io_lib:nl()]), io:put_chars([os:cmd(CmdString++" ; echo ' =>' $?")]), ok. + +-define(CAP_NET_RAW, 13). %% from /usr/include/linux/capability.h + +can_bind_to_device({unix, linux}, {Major, _, _}) + when Major > 2 -> + Status = os:cmd("cat /proc/self/status | grep CapEff"), + [_, CapEffStr] = string:tokens(Status, [$\n, $\t]), + CapEff = list_to_integer(CapEffStr, 16), + if CapEff band (1 bsl ?CAP_NET_RAW) =/= 0 -> + ok; + true -> + {skip,"insufficient capabilities, CAP_NET_RAW not granted"} + end; +can_bind_to_device(_OS, _Version) -> + {skip,"socket option bind_to_device not supported on this OS or version"}. + +simple_bind_to_device(Config) when is_list(Config) -> + case can_bind_to_device(os:type(), os:version()) of + ok -> + {ok,U} = gen_udp:open(0), + jog_bind_to_device_opt(U), + ok = gen_udp:close(U), + %% + {ok,L} = gen_tcp:listen(0, []), + jog_bind_to_device_opt(L), + ok = gen_tcp:close(L), + %% + case gen_sctp:open() of + {ok,S} -> + jog_bind_to_device_opt(S), + ok = gen_sctp:close(S); + {error,eprotonosupport} -> + ok + end; + Other -> + Other + end. + +%% Smoke test bind_to_device support. +simple_bind_to_device_open(Config) when is_list(Config) -> + case can_bind_to_device(os:type(), os:version()) of + ok -> + {ok,U} = gen_udp:open(0, [binary,{bind_to_device,<<"lo">>},inet]), + ok = gen_udp:close(U), + {ok,T} = gen_tcp:listen(0, [binary,{bind_to_device,<<"lo">>},inet]), + ok = gen_tcp:close(T), + + case gen_sctp:open(0, [binary,{bind_to_device,<<"lo">>},inet]) of + {ok,S} -> + ok = gen_sctp:close(S); + {error,eprotonosupport} -> + ok + end; + Other -> + Other + end. + +jog_bind_to_device_opt(S) -> + %% This is just jogging the option mechanics + ok = inet:setopts(S, [{bind_to_device,<<>>}]), + {ok,[{bind_to_device,<<>>}]} = inet:getopts(S, [bind_to_device]), + ok = inet:setopts(S, [{bind_to_device,<<"lo">>}]), + {ok,[{bind_to_device,<<"lo">>}]} = inet:getopts(S, [bind_to_device]), + ok. |