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nc_bloaty: support udp broadcast ports

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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>
This commit is contained in:
Norbert Lange 2020-02-14 22:13:38 +01:00 committed by Denys Vlasenko
parent c918ea1673
commit a16c8ef212
1 changed files with 15 additions and 9 deletions
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24
networking/nc_bloaty.c
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@ -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