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nc: make connecting to IPv4 from IPv6-enabled hosts easier

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(was requiring -s <local addr>)
This commit is contained in:
Denis Vlasenko
2007-06-05 20:08:11 +00:00
parent 6c501a71ae
commit 5c51a7ca52
3 changed files with 39 additions and 25 deletions
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21
networking/nc_bloaty.c
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@ -751,6 +751,13 @@ int nc_main(int argc, char **argv)
/* We manage our fd's so that they are never 0,1,2 */
/*bb_sanitize_stdio(); - not needed */
if (argv[0]) {
themaddr = xhost2sockaddr(argv[0],
argv[1]
? bb_lookup_port(argv[1], o_udpmode ? "udp" : "tcp", 0)
: 0);
}
/* create & bind network socket */
x = (o_udpmode ? SOCK_DGRAM : SOCK_STREAM);
if (option_mask32 & OPT_s) { /* local address */
@ -758,7 +765,11 @@ int nc_main(int argc, char **argv)
ouraddr = xhost2sockaddr(str_s, o_lport);
x = xsocket(ouraddr->sa.sa_family, x, 0);
} else {
x = xsocket_type(&ouraddr, x);
/* We try IPv6, then IPv4, unless addr family is
* implicitly set by way of remote addr/port spec */
x = xsocket_type(&ouraddr,
USE_FEATURE_IPV6((themaddr ? themaddr->sa.sa_family : AF_UNSPEC),)
x);
if (o_lport)
set_nport(ouraddr, htons(o_lport));
}
@ -789,14 +800,6 @@ int nc_main(int argc, char **argv)
xmove_fd(xopen(str_o, O_WRONLY|O_CREAT|O_TRUNC), ofd);
#endif
if (argv[0]) {
themaddr = xhost2sockaddr(argv[0],
argv[1]
? bb_lookup_port(argv[1], o_udpmode ? "udp" : "tcp", 0)
: 0);
///what if sa_family won't match??
}
if (o_listen) {
dolisten();
/* dolisten does its own connect reporting */