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ip address: Add support for "valid_lft" and "preferred_lft" options

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Signed-off-by: Christian Eggers <ceggers@arri.de>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Christian Eggers 2020-06-29 17:57:26 +02:00 committed by Denys Vlasenko
parent 31d34f3bd8
commit 8a485b0a36
2 changed files with 62 additions and 7 deletions
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4
networking/libiproute/ip_common.h
View File

@ -33,4 +33,8 @@ int FAST_FUNC do_iplink(char **argv);
POP_SAVED_FUNCTION_VISIBILITY
#ifndef INFINITY_LIFE_TIME
#define INFINITY_LIFE_TIME 0xFFFFFFFFU
#endif
#endif

65
networking/libiproute/ipaddress.c
View File

@ -592,6 +592,14 @@ int FAST_FUNC ipaddr_list_or_flush(char **argv, int flush)
return 0;
}
static void set_lifetime(unsigned int *lifetime, char *argv, const char *errmsg)
{
if (strcmp(argv, "forever") == 0)
*lifetime = INFINITY_LIFE_TIME;
else
*lifetime = get_u32(argv, errmsg);
}
static int default_scope(inet_prefix *lcl)
{
if (lcl->family == AF_INET) {
@ -607,10 +615,13 @@ static int ipaddr_modify(int cmd, int flags, char **argv)
/* If you add stuff here, update ipaddr_full_usage */
static const char option[] ALIGN1 =
"peer\0""remote\0""broadcast\0""brd\0"
"anycast\0""scope\0""dev\0""label\0""noprefixroute\0""local\0";
"anycast\0""valid_lft\0""preferred_lft\0"
"scope\0""dev\0""label\0""noprefixroute\0""local\0";
#define option_peer option
#define option_broadcast (option + sizeof("peer") + sizeof("remote"))
#define option_anycast (option_broadcast + sizeof("broadcast") + sizeof("brd"))
#define option_valid_lft (option_anycast + sizeof("anycast"))
#define option_pref_lft (option_valid_lft + sizeof("valid_lft"))
struct rtnl_handle rth;
struct {
struct nlmsghdr n;
@ -619,6 +630,8 @@ static int ipaddr_modify(int cmd, int flags, char **argv)
} req;
char *d = NULL;
char *l = NULL;
char *valid_lftp = NULL;
char *preferred_lftp = NULL;
inet_prefix lcl;
inet_prefix peer;
int local_len = 0;
@ -626,6 +639,8 @@ static int ipaddr_modify(int cmd, int flags, char **argv)
int brd_len = 0;
int any_len = 0;
bool scoped = 0;
__u32 valid_lft = INFINITY_LIFE_TIME;
__u32 preferred_lft = INFINITY_LIFE_TIME;
unsigned int ifa_flags = 0;
memset(&req, 0, sizeof(req));
@ -638,10 +653,9 @@ static int ipaddr_modify(int cmd, int flags, char **argv)
while (*argv) {
unsigned arg = index_in_strings(option, *argv);
/* if search fails, "local" is assumed */
if ((int)arg >= 0 && arg != 8)
NEXT_ARG();
if (arg <= 1) { /* peer, remote */
NEXT_ARG();
if (peer_len) {
duparg(option_peer, *argv);
}
@ -654,6 +668,7 @@ static int ipaddr_modify(int cmd, int flags, char **argv)
req.ifa.ifa_prefixlen = peer.bitlen;
} else if (arg <= 3) { /* broadcast, brd */
inet_prefix addr;
NEXT_ARG();
if (brd_len) {
duparg(option_broadcast, *argv);
}
@ -670,6 +685,7 @@ static int ipaddr_modify(int cmd, int flags, char **argv)
}
} else if (arg == 4) { /* anycast */
inet_prefix addr;
NEXT_ARG();
if (any_len) {
duparg(option_anycast, *argv);
}
@ -679,22 +695,39 @@ static int ipaddr_modify(int cmd, int flags, char **argv)
}
addattr_l(&req.n, sizeof(req), IFA_ANYCAST, &addr.data, addr.bytelen);
any_len = addr.bytelen;
} else if (arg == 5) { /* scope */
} else if (arg == 5) { /* valid_lft */
if (valid_lftp)
duparg(option_valid_lft, *argv);
NEXT_ARG();
valid_lftp = *argv;
set_lifetime(&valid_lft, *argv, option_valid_lft);
} else if (arg == 6) { /* preferred_lft */
if (preferred_lftp)
duparg(option_pref_lft, *argv);
NEXT_ARG();
preferred_lftp = *argv;
set_lifetime(&preferred_lft, *argv, option_pref_lft);
} else if (arg == 7) { /* scope */
uint32_t scope = 0;
NEXT_ARG();
if (rtnl_rtscope_a2n(&scope, *argv)) {
invarg_1_to_2(*argv, "scope");
}
req.ifa.ifa_scope = scope;
scoped = 1;
} else if (arg == 6) { /* dev */
} else if (arg == 8) { /* dev */
NEXT_ARG();
d = *argv;
} else if (arg == 7) { /* label */
} else if (arg == 9) { /* label */
NEXT_ARG();
l = *argv;
addattr_l(&req.n, sizeof(req), IFA_LABEL, l, strlen(l) + 1);
} else if (arg == 8) { /* noprefixroute */
} else if (arg == 10) { /* noprefixroute */
ifa_flags |= IFA_F_NOPREFIXROUTE;
} else {
/* local (specified or assumed) */
if ((int)arg >= 0)
NEXT_ARG();
if (local_len) {
duparg2("local", *argv);
}
@ -755,6 +788,24 @@ static int ipaddr_modify(int cmd, int flags, char **argv)
req.ifa.ifa_index = xll_name_to_index(d);
if (valid_lftp || preferred_lftp) {
struct ifa_cacheinfo cinfo = {};
if (!valid_lft) {
fprintf(stderr, "valid_lft is zero\n");
return 1;
}
if (valid_lft < preferred_lft) {
fprintf(stderr, "preferred_lft is greater than valid_lft\n");
return 1;
}
cinfo.ifa_prefered = preferred_lft;
cinfo.ifa_valid = valid_lft;
addattr_l(&req.n, sizeof(req), IFA_CACHEINFO, &cinfo,
sizeof(cinfo));
}
if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0)
return 2;