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udhcpc6: new applet. Not yet functional.

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It builds. It sends Solicit packets. Not sure these packets are well-formed.
I have no server to test it against.

function                                             old     new   delta
udhcpc6_main                                           -    2426   +2426
d6_send_raw_packet                                     -     428    +428
d6_send_kernel_packet                                  -     274    +274
d6_recv_raw_packet                                     -     248    +248
send_d6_discover                                       -     177    +177
packed_usage                                       28795   28966    +171
d6_run_script                                          -     156    +156
send_d6_renew                                          -     140    +140
send_d6_release                                        -     126    +126
d6_recv_kernel_packet                                  -     116    +116
send_d6_select                                         -      95     +95
perform_d6_release                                     -      78     +78
d6_find_option                                         -      74     +74
init_d6_packet                                         -      54     +54
d6_copy_option                                         -      48     +48
d6_mcast_from_client_config_ifindex                    -      42     +42
d6_dump_packet                                         -      24     +24
static.FF02__1_2                                       -      16     +16
d6_store_blob                                          -      13     +13
applet_names                                        2432    2440      +8
applet_main                                         1412    1416      +4
applet_nameofs                                       706     708      +2
add_d6_client_options                                  -       1      +1
------------------------------------------------------------------------------
(add/remove: 21/0 grow/shrink: 4/0 up/down: 4721/0)          Total: 4721 bytes
   text	   data	    bss	    dec	    hex	filename
 879080	    493	   7584	 887157	  d8975	busybox_old
 884585	    497	   7584	 892666	  d9efa	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
2011-11-07 15:55:39 +01:00
parent 50089fc61c
commit 9ba75048c0
4 changed files with 1724 additions and 0 deletions
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34
networking/udhcp/d6_socket.c Normal file
View File

@@ -0,0 +1,34 @@
/* vi: set sw=4 ts=4: */
/*
* Copyright (C) 2011 Denys Vlasenko.
*
* Licensed under GPLv2, see file LICENSE in this source tree.
*/
#include "common.h"
#include "d6_common.h"
#include <net/if.h>
int FAST_FUNC d6_listen_socket(int port, const char *inf)
{
int fd;
struct sockaddr_in6 addr;
log1("Opening listen socket on *:%d %s", port, inf);
fd = xsocket(PF_INET6, SOCK_DGRAM, IPPROTO_UDP);
setsockopt_reuseaddr(fd);
if (setsockopt_broadcast(fd) == -1)
bb_perror_msg_and_die("SO_BROADCAST");
/* NB: bug 1032 says this doesn't work on ethernet aliases (ethN:M) */
if (setsockopt_bindtodevice(fd, inf))
xfunc_die(); /* warning is already printed */
memset(&addr, 0, sizeof(addr));
addr.sin6_family = AF_INET6;
addr.sin6_port = htons(port);
/* addr.sin6_addr is all-zeros */
xbind(fd, (struct sockaddr *)&addr, sizeof(addr));
return fd;
}