diff options
| author | Norbert Lange <nolange79@gmail.com> | 2020-02-14 22:13:38 +0100 |
|---|---|---|
| committer | Denys Vlasenko <vda.linux@googlemail.com> | 2020-06-29 13:53:17 +0200 |
| commit | a16c8ef21253d2fbb8f311ee34514cdc0a3f49a2 (patch) | |
| tree | dba4988cbc961818b6cc07b312dcd7e34df7d89f | |
| parent | c918ea1673e4e930835d387bb989c620bf022e94 (diff) | |
| download | busybox-a16c8ef21253d2fbb8f311ee34514cdc0a3f49a2.tar.gz | |
nc_bloaty: support udp broadcast ports
Add a -b option, identical to debians "traditional" netcat.
This allows sending (subnet) UDP Broadcasts.
function old new delta
packed_usage 33420 33441 +21
nc_main 1041 1057 +16
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/0 up/down: 37/0) Total: 37 bytes
Signed-off-by: Norbert Lange <nolange79@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
| -rw-r--r-- | networking/nc_bloaty.c | 24 |
1 files changed, 15 insertions, 9 deletions
diff --git a/networking/nc_bloaty.c b/networking/nc_bloaty.c index 034e03d21..88eda6b28 100644 --- a/networking/nc_bloaty.c +++ b/networking/nc_bloaty.c @@ -84,6 +84,7 @@ //usage: ) //usage: "\n -n Don't do DNS resolution" //usage: "\n -u UDP mode" +//usage: "\n -b Allow broadcasts" //usage: "\n -v Verbose" //usage: IF_NC_EXTRA( //usage: "\n -o FILE Hex dump traffic" @@ -171,17 +172,19 @@ enum { OPT_p = (1 << 1), OPT_s = (1 << 2), OPT_u = (1 << 3), - OPT_v = (1 << 4), - OPT_w = (1 << 5), - OPT_l = (1 << 6) * ENABLE_NC_SERVER, - OPT_k = (1 << 7) * ENABLE_NC_SERVER, - OPT_i = (1 << (6+2*ENABLE_NC_SERVER)) * ENABLE_NC_EXTRA, - OPT_o = (1 << (7+2*ENABLE_NC_SERVER)) * ENABLE_NC_EXTRA, - OPT_z = (1 << (8+2*ENABLE_NC_SERVER)) * ENABLE_NC_EXTRA, + OPT_b = (1 << 4), + OPT_v = (1 << 5), + OPT_w = (1 << 6), + OPT_l = (1 << 7) * ENABLE_NC_SERVER, + OPT_k = (1 << 8) * ENABLE_NC_SERVER, + OPT_i = (1 << (7+2*ENABLE_NC_SERVER)) * ENABLE_NC_EXTRA, + OPT_o = (1 << (8+2*ENABLE_NC_SERVER)) * ENABLE_NC_EXTRA, + OPT_z = (1 << (9+2*ENABLE_NC_SERVER)) * ENABLE_NC_EXTRA, }; #define o_nflag (option_mask32 & OPT_n) #define o_udpmode (option_mask32 & OPT_u) +#define o_bcmode (option_mask32 & OPT_b) #if ENABLE_NC_EXTRA #define o_ofile (option_mask32 & OPT_o) #define o_zero (option_mask32 & OPT_z) @@ -788,7 +791,7 @@ int nc_main(int argc UNUSED_PARAM, char **argv) // -g -G -t -r deleted, unimplemented -a deleted too getopt32(argv, "^" - "np:s:uvw:+"/* -w N */ IF_NC_SERVER("lk") + "np:s:ubvw:+"/* -w N */ IF_NC_SERVER("lk") IF_NC_EXTRA("i:o:z") "\0" "?2:vv"IF_NC_SERVER(":ll"), /* max 2 params; -v and -l are counters */ @@ -851,8 +854,11 @@ int nc_main(int argc UNUSED_PARAM, char **argv) } xmove_fd(x, netfd); setsockopt_reuseaddr(netfd); - if (o_udpmode) + if (o_udpmode) { + if (o_bcmode) + setsockopt_broadcast(netfd); socket_want_pktinfo(netfd); + } if (!ENABLE_FEATURE_UNIX_LOCAL || cnt_l != 0 /* listen */ || ouraddr->u.sa.sa_family != AF_UNIX |