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This commit is contained in:
roy 2019-12-20 12:01:35 +00:00
parent 77955cec60
commit 221cda2432
7 changed files with 174 additions and 102 deletions
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2
external/bsd/dhcpcd/dist/hooks/dhcpcd-run-hooks.in vendored
View File

@ -212,7 +212,7 @@ valid_domainname_list()
# With the advent of alternative init systems, it's possible to have # With the advent of alternative init systems, it's possible to have
# more than one installed. So we need to try and guess what one we're # more than one installed. So we need to try and guess what one we're
# using unless overriden by configure. # using unless overridden by configure.
detect_init() detect_init()
{ {
_service_exists="@SERVICEEXISTS@" _service_exists="@SERVICEEXISTS@"

47
external/bsd/dhcpcd/dist/src/dhcp.c vendored
View File

@ -176,6 +176,11 @@ get_option(struct dhcpcd_ctx *ctx,
const uint8_t *op; const uint8_t *op;
size_t bl; size_t bl;
if (bootp == NULL || bootp_len < DHCP_MIN_LEN) {
errno = EINVAL;
return NULL;
}
/* Check we have the magic cookie */ /* Check we have the magic cookie */
if (!IS_DHCP(bootp)) { if (!IS_DHCP(bootp)) {
errno = ENOTSUP; errno = ENOTSUP;
@ -484,7 +489,7 @@ print_rfc3361(FILE *fp, const uint8_t *data, size_t dl)
return -1; return -1;
break; break;
case 1: case 1:
if (dl == 0 || dl % 4 != 0) { if (dl % 4 != 0) {
errno = EINVAL; errno = EINVAL;
break; break;
} }
@ -1179,7 +1184,7 @@ read_lease(struct interface *ifp, struct bootp **bootp)
* (it should be more, and our read packet enforces this so this * (it should be more, and our read packet enforces this so this
* code should not be needed, but of course people could * code should not be needed, but of course people could
* scribble whatever in the stored lease file. */ * scribble whatever in the stored lease file. */
if (bytes < offsetof(struct bootp, vend) + 4) { if (bytes < DHCP_MIN_LEN) {
free(lease); free(lease);
logerrx("%s: %s: truncated lease", ifp->name, __func__); logerrx("%s: %s: truncated lease", ifp->name, __func__);
return 0; return 0;
@ -1540,7 +1545,7 @@ dhcp_close(struct interface *ifp)
} }
static int static int
dhcp_openudp(struct interface *ifp) dhcp_openudp(struct in_addr *ia)
{ {
int s; int s;
struct sockaddr_in sin; struct sockaddr_in sin;
@ -1551,29 +1556,25 @@ dhcp_openudp(struct interface *ifp)
n = 1; n = 1;
if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &n, sizeof(n)) == -1) if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &n, sizeof(n)) == -1)
goto eexit; goto errexit;
#ifdef IP_RECVIF #ifdef IP_RECVIF
if (setsockopt(s, IPPROTO_IP, IP_RECVIF, &n, sizeof(n)) == -1) if (setsockopt(s, IPPROTO_IP, IP_RECVIF, &n, sizeof(n)) == -1)
goto eexit; goto errexit;
#else #else
if (setsockopt(s, IPPROTO_IP, IP_RECVPKTINFO, &n, sizeof(n)) == -1) if (setsockopt(s, IPPROTO_IP, IP_RECVPKTINFO, &n, sizeof(n)) == -1)
goto eexit; goto errexit;
#endif #endif
memset(&sin, 0, sizeof(sin)); memset(&sin, 0, sizeof(sin));
sin.sin_family = AF_INET; sin.sin_family = AF_INET;
sin.sin_port = htons(BOOTPC); sin.sin_port = htons(BOOTPC);
if (ifp) { if (ia != NULL)
const struct dhcp_state *state = D_CSTATE(ifp); sin.sin_addr = *ia;
if (state->addr)
sin.sin_addr.s_addr = state->addr->addr.s_addr;
}
if (bind(s, (struct sockaddr *)&sin, sizeof(sin)) == -1) if (bind(s, (struct sockaddr *)&sin, sizeof(sin)) == -1)
goto eexit; goto errexit;
return s; return s;
eexit: errexit:
close(s); close(s);
return -1; return -1;
} }
@ -1675,7 +1676,7 @@ dhcp_sendudp(struct interface *ifp, struct in_addr *to, void *data, size_t len)
fd = state->udp_fd; fd = state->udp_fd;
if (fd == -1) { if (fd == -1) {
fd = dhcp_openudp(ifp); fd = dhcp_openudp(state->addr != NULL ?&state->addr->addr:NULL);
if (fd == -1) if (fd == -1)
return -1; return -1;
} }
@ -1734,7 +1735,9 @@ send_message(struct interface *ifp, uint8_t type,
goto fail; goto fail;
len = (size_t)r; len = (size_t)r;
if (ipv4_iffindaddr(ifp, &state->lease.addr, NULL) != NULL) if (!(state->added & STATE_FAKE) &&
state->addr != NULL &&
ipv4_iffindaddr(ifp, &state->lease.addr, NULL) != NULL)
from.s_addr = state->lease.addr.s_addr; from.s_addr = state->lease.addr.s_addr;
else else
from.s_addr = INADDR_ANY; from.s_addr = INADDR_ANY;
@ -1751,7 +1754,7 @@ send_message(struct interface *ifp, uint8_t type,
* even if they are setup to send them. * even if they are setup to send them.
* Broadcasting from UDP is only an optimisation for rebinding * Broadcasting from UDP is only an optimisation for rebinding
* and on BSD, at least, is reliant on the subnet route being * and on BSD, at least, is reliant on the subnet route being
* correctly configured to recieve the unicast reply. * correctly configured to receive the unicast reply.
* As such, we always broadcast and receive the reply to it via BPF. * As such, we always broadcast and receive the reply to it via BPF.
* This also guarantees we have a DHCP server attached to the * This also guarantees we have a DHCP server attached to the
* interface we want to configure because we can't dictate the * interface we want to configure because we can't dictate the
@ -2266,10 +2269,11 @@ dhcp_bind(struct interface *ifp)
return; return;
dhcp_close(ifp); dhcp_close(ifp);
/* If not in master mode, open an address specific socket. */ /* If not in master mode, open an address specific socket. */
if (ctx->udp_fd != -1) if (ctx->udp_fd != -1)
return; return;
state->udp_fd = dhcp_openudp(ifp); state->udp_fd = dhcp_openudp(&state->addr->addr);
if (state->udp_fd == -1) { if (state->udp_fd == -1) {
logerr(__func__); logerr(__func__);
/* Address sharing without master mode is not supported. /* Address sharing without master mode is not supported.
@ -2352,6 +2356,7 @@ dhcp_arp_new(struct interface *ifp, struct in_addr *addr)
#ifdef KERNEL_RFC5227 #ifdef KERNEL_RFC5227
astate->announced_cb = dhcp_arp_announced; astate->announced_cb = dhcp_arp_announced;
#else #else
astate->announced_cb = NULL;
astate->defend_failed_cb = dhcp_arp_defend_failed; astate->defend_failed_cb = dhcp_arp_defend_failed;
#endif #endif
return astate; return astate;
@ -2501,7 +2506,7 @@ dhcp_inform(struct interface *ifp)
state->offer_len = dhcp_message_new(&state->offer, state->offer_len = dhcp_message_new(&state->offer,
&ifo->req_addr, &ifo->req_mask); &ifo->req_addr, &ifo->req_mask);
#ifdef ARP #ifdef ARP
if (dhcp_arp_address(ifp) == 0) if (dhcp_arp_address(ifp) != 1)
return; return;
#endif #endif
ia = ipv4_iffindaddr(ifp, ia = ipv4_iffindaddr(ifp,
@ -3390,7 +3395,7 @@ dhcp_handlebootp(struct interface *ifp, struct bootp *bootp, size_t len,
} }
static void static void
dhcp_handlebpf(struct interface *ifp, uint8_t *data, size_t len) dhcp_packet(struct interface *ifp, uint8_t *data, size_t len)
{ {
struct bootp *bootp; struct bootp *bootp;
struct in_addr from; struct in_addr from;
@ -3445,7 +3450,7 @@ dhcp_readbpf(void *arg)
} }
break; break;
} }
dhcp_handlebpf(ifp, buf, (size_t)bytes); dhcp_packet(ifp, buf, (size_t)bytes);
/* Check we still have a state after processing. */ /* Check we still have a state after processing. */
if ((state = D_STATE(ifp)) == NULL) if ((state = D_STATE(ifp)) == NULL)
break; break;

147
external/bsd/dhcpcd/dist/src/dhcp6.c vendored
View File

@ -171,7 +171,7 @@ static const char * const dhcp6_statuses[] = {
static void dhcp6_bind(struct interface *, const char *, const char *); static void dhcp6_bind(struct interface *, const char *, const char *);
static void dhcp6_failinform(void *); static void dhcp6_failinform(void *);
static int dhcp6_listen(struct dhcpcd_ctx *, struct ipv6_addr *); static int dhcp6_openudp(unsigned int, struct in6_addr *);
static void dhcp6_recvaddr(void *); static void dhcp6_recvaddr(void *);
void void
@ -2132,13 +2132,10 @@ dhcp6_findpd(struct interface *ifp, const uint8_t *iaid,
a->dadcallback = dhcp6_dadcallback; a->dadcallback = dhcp6_dadcallback;
a->ia_type = D6_OPTION_IA_PD; a->ia_type = D6_OPTION_IA_PD;
memcpy(a->iaid, iaid, sizeof(a->iaid)); memcpy(a->iaid, iaid, sizeof(a->iaid));
TAILQ_INIT(&a->pd_pfxs);
TAILQ_INSERT_TAIL(&state->addrs, a, next); TAILQ_INSERT_TAIL(&state->addrs, a, next);
} else { } else {
if (!(a->flags & IPV6_AF_DELEGATEDPFX)) { if (!(a->flags & IPV6_AF_DELEGATEDPFX))
a->flags |= IPV6_AF_NEW | IPV6_AF_DELEGATEDPFX; a->flags |= IPV6_AF_NEW | IPV6_AF_DELEGATEDPFX;
TAILQ_INIT(&a->pd_pfxs);
}
a->flags &= ~(IPV6_AF_STALE | a->flags &= ~(IPV6_AF_STALE |
IPV6_AF_EXTENDED | IPV6_AF_EXTENDED |
IPV6_AF_REQUEST); IPV6_AF_REQUEST);
@ -2341,6 +2338,46 @@ dhcp6_findia(struct interface *ifp, struct dhcp6_message *m, size_t l,
return i; return i;
} }
#ifndef SMALL
static void
dhcp6_deprecatedele(struct ipv6_addr *ia)
{
struct ipv6_addr *da, *dan, *dda;
struct timespec now;
struct dhcp6_state *state;
timespecclear(&now);
TAILQ_FOREACH_SAFE(da, &ia->pd_pfxs, pd_next, dan) {
if (ia->prefix_vltime == 0) {
if (da->prefix_vltime != 0)
da->prefix_vltime = 0;
else
continue;
} else if (da->prefix_pltime != 0)
da->prefix_pltime = 0;
else
continue;
if (ipv6_doaddr(da, &now) != -1)
continue;
/* Delegation deleted, forget it. */
TAILQ_REMOVE(&ia->pd_pfxs, da, pd_next);
/* Delete it from the interface. */
state = D6_STATE(da->iface);
TAILQ_FOREACH(dda, &state->addrs, next) {
if (IN6_ARE_ADDR_EQUAL(&dda->addr, &da->addr))
break;
}
if (dda != NULL) {
TAILQ_REMOVE(&state->addrs, dda, next);
ipv6_freeaddr(dda);
}
}
}
#endif
static void static void
dhcp6_deprecateaddrs(struct ipv6_addrhead *addrs) dhcp6_deprecateaddrs(struct ipv6_addrhead *addrs)
{ {
@ -2363,24 +2400,8 @@ dhcp6_deprecateaddrs(struct ipv6_addrhead *addrs)
#ifndef SMALL #ifndef SMALL
/* If we delegated from this prefix, deprecate or remove /* If we delegated from this prefix, deprecate or remove
* the delegations. */ * the delegations. */
if (ia->flags & IPV6_AF_DELEGATEDPFX) { if (ia->flags & IPV6_AF_DELEGATEDPFX)
struct ipv6_addr *da; dhcp6_deprecatedele(ia);
bool touched = false;
TAILQ_FOREACH(da, &ia->pd_pfxs, pd_next) {
if (ia->prefix_vltime == 0) {
if (da->prefix_vltime != 0) {
da->prefix_vltime = 0;
touched = true;
}
} else if (da->prefix_pltime != 0) {
da->prefix_pltime = 0;
touched = true;
}
}
if (touched)
ipv6_addaddrs(&ia->pd_pfxs);
}
#endif #endif
if (ia->flags & IPV6_AF_REQUEST) { if (ia->flags & IPV6_AF_REQUEST) {
@ -2988,8 +3009,9 @@ dhcp6_bind(struct interface *ifp, const char *op, const char *sfrom)
TAILQ_FOREACH(ia, &state->addrs, next) { TAILQ_FOREACH(ia, &state->addrs, next) {
if (ia->flags & IPV6_AF_STALE) if (ia->flags & IPV6_AF_STALE)
continue; continue;
if (!(state->renew == ND6_INFINITE_LIFETIME && if (!(state->renew == ND6_INFINITE_LIFETIME
ia->prefix_vltime == ND6_INFINITE_LIFETIME) && ia->prefix_vltime == ND6_INFINITE_LIFETIME)
&& ia->prefix_vltime != 0
&& ia->prefix_vltime <= state->renew) && ia->prefix_vltime <= state->renew)
logwarnx( logwarnx(
"%s: %s will expire before renewal", "%s: %s will expire before renewal",
@ -3557,6 +3579,42 @@ dhcp6_recvmsg(struct dhcpcd_ctx *ctx, struct msghdr *msg, struct ipv6_addr *ia)
ifp = ifp1; ifp = ifp1;
} }
#if 0
/*
* Handy code to inject raw DHCPv6 packets over responses
* from our server.
* This allows me to take a 3rd party wireshark trace and
* replay it in my code.
*/
static int replyn = 0;
char fname[PATH_MAX], tbuf[64 * 1024];
int fd;
ssize_t tlen;
uint8_t *si1, *si2;
uint16_t si_len1, si_len2;
snprintf(fname, sizeof(fname),
"/tmp/dhcp6.reply%d.raw", replyn++);
fd = open(fname, O_RDONLY, 0);
if (fd == -1) {
logerr("%s: open `%s'", __func__, fname);
return;
}
tlen = read(fd, tbuf, sizeof(tbuf));
if (tlen == -1)
logerr("%s: read `%s'", __func__, fname);
close(fd);
/* Copy across ServerID so we can work with our own server. */
si1 = dhcp6_findmoption(r, len, D6_OPTION_SERVERID, &si_len1);
si2 = dhcp6_findmoption(tbuf, (size_t)tlen,
D6_OPTION_SERVERID, &si_len2);
if (si1 != NULL && si2 != NULL && si_len1 == si_len2)
memcpy(si2, si1, si_len2);
r = (struct dhcp6_message *)tbuf;
len = (size_t)tlen;
#endif
dhcp6_recvif(ifp, sfrom, r, len); dhcp6_recvif(ifp, sfrom, r, len);
} }
@ -3606,7 +3664,7 @@ dhcp6_recvctx(void *arg)
} }
static int static int
dhcp6_listen(struct dhcpcd_ctx *ctx, struct ipv6_addr *ia) dhcp6_openudp(unsigned int ifindex, struct in6_addr *ia)
{ {
struct sockaddr_in6 sa; struct sockaddr_in6 sa;
int n, s; int n, s;
@ -3629,8 +3687,8 @@ dhcp6_listen(struct dhcpcd_ctx *ctx, struct ipv6_addr *ia)
#endif #endif
if (ia != NULL) { if (ia != NULL) {
memcpy(&sa.sin6_addr, &ia->addr, sizeof(sa.sin6_addr)); memcpy(&sa.sin6_addr, ia, sizeof(sa.sin6_addr));
sa.sin6_scope_id = ia->iface->index; sa.sin6_scope_id = ifindex;
} }
if (bind(s, (struct sockaddr *)&sa, sizeof(sa)) == -1) if (bind(s, (struct sockaddr *)&sa, sizeof(sa)) == -1)
@ -3640,11 +3698,6 @@ dhcp6_listen(struct dhcpcd_ctx *ctx, struct ipv6_addr *ia)
if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVPKTINFO, &n, sizeof(n)) == -1) if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVPKTINFO, &n, sizeof(n)) == -1)
goto errexit; goto errexit;
if (ia != NULL) {
ia->dhcp6_fd = s;
eloop_event_add(ctx->eloop, s, dhcp6_recvaddr, ia);
}
return s; return s;
errexit: errexit:
@ -3686,18 +3739,6 @@ dhcp6_activateinterfaces(struct interface *ifp)
} }
#endif #endif
static int
dhcp6_open(struct dhcpcd_ctx *ctx)
{
if (ctx->dhcp6_fd != -1 ||
(ctx->dhcp6_fd = dhcp6_listen(ctx, NULL)) == -1)
return ctx->dhcp6_fd;
eloop_event_add(ctx->eloop, ctx->dhcp6_fd, dhcp6_recvctx, ctx);
return ctx->dhcp6_fd;
}
static void static void
dhcp6_start1(void *arg) dhcp6_start1(void *arg)
{ {
@ -3708,9 +3749,13 @@ dhcp6_start1(void *arg)
size_t i; size_t i;
const struct dhcp_compat *dhc; const struct dhcp_compat *dhc;
if (ctx->options & DHCPCD_MASTER) { if (ctx->options & DHCPCD_MASTER && ctx->dhcp6_fd == -1) {
if (dhcp6_open(ctx) == -1) ctx->dhcp6_fd = dhcp6_openudp(0, NULL);
if (ctx->dhcp6_fd == -1) {
logerr(__func__);
return; return;
}
eloop_event_add(ctx->eloop, ctx->dhcp6_fd, dhcp6_recvctx, ctx);
} }
state = D6_STATE(ifp); state = D6_STATE(ifp);
@ -3974,7 +4019,13 @@ dhcp6_handleifa(int cmd, struct ipv6_addr *ia, pid_t pid)
!(ifp->ctx->options & DHCPCD_MASTER) && !(ifp->ctx->options & DHCPCD_MASTER) &&
ifp->options->options & DHCPCD_DHCP6 && ifp->options->options & DHCPCD_DHCP6 &&
ia->dhcp6_fd == -1) ia->dhcp6_fd == -1)
dhcp6_listen(ia->iface->ctx, ia); {
ia->dhcp6_fd = dhcp6_openudp(ia->iface->index, &ia->addr);
if (ia->dhcp6_fd != -1)
eloop_event_add(ia->iface->ctx->eloop, ia->dhcp6_fd,
dhcp6_recvaddr, ia);
}
if ((state = D6_STATE(ifp)) != NULL) if ((state = D6_STATE(ifp)) != NULL)
ipv6_handleifa_addrs(cmd, &state->addrs, ia, pid); ipv6_handleifa_addrs(cmd, &state->addrs, ia, pid);

2
external/bsd/dhcpcd/dist/src/dhcpcd.c vendored
View File

@ -992,7 +992,7 @@ run_preinit(struct interface *ifp)
return; return;
script_runreason(ifp, "PREINIT"); script_runreason(ifp, "PREINIT");
if (ifp->wireless) if (ifp->wireless && ifp->carrier == LINK_UP)
dhcpcd_reportssid(ifp); dhcpcd_reportssid(ifp);
if (ifp->options->options & DHCPCD_LINK && ifp->carrier != LINK_UNKNOWN) if (ifp->options->options & DHCPCD_LINK && ifp->carrier != LINK_UNKNOWN)
script_runreason(ifp, script_runreason(ifp,

75
external/bsd/dhcpcd/dist/src/ipv6.c vendored
View File

@ -920,43 +920,54 @@ ipv6_findaddr(struct dhcpcd_ctx *ctx, const struct in6_addr *addr, unsigned int
#endif #endif
} }
ssize_t int
ipv6_addaddrs(struct ipv6_addrhead *addrs) ipv6_doaddr(struct ipv6_addr *ia, struct timespec *now)
{
/* A delegated prefix is not an address. */
if (ia->flags & IPV6_AF_DELEGATEDPFX)
return 0;
if (ia->prefix_vltime == 0) {
if (ia->flags & IPV6_AF_ADDED)
ipv6_deleteaddr(ia);
eloop_q_timeout_delete(ia->iface->ctx->eloop,
0, NULL, ia);
if (ia->flags & IPV6_AF_REQUEST) {
ia->flags &= ~IPV6_AF_ADDED;
return 0;
}
return -1;
}
if (ia->flags & IPV6_AF_STALE ||
IN6_IS_ADDR_UNSPECIFIED(&ia->addr))
return 0;
if (!timespecisset(now))
clock_gettime(CLOCK_MONOTONIC, now);
ipv6_addaddr(ia, now);
return ia->flags & IPV6_AF_NEW ? 1 : 0;
}
ssize_t
ipv6_addaddrs(struct ipv6_addrhead *iaddrs)
{ {
struct ipv6_addr *ap, *apn;
ssize_t i;
struct timespec now; struct timespec now;
struct ipv6_addr *ia, *ian;
ssize_t i, r;
i = 0; i = 0;
timespecclear(&now); timespecclear(&now);
TAILQ_FOREACH_SAFE(ap, addrs, next, apn) { TAILQ_FOREACH_SAFE(ia, iaddrs, next, ian) {
/* A delegated prefix is not an address. */ r = ipv6_doaddr(ia, &now);
if (ap->flags & IPV6_AF_DELEGATEDPFX) if (r != 0)
continue; i++;
if (ap->prefix_vltime == 0) { if (r == -1) {
if (ap->flags & IPV6_AF_ADDED) { TAILQ_REMOVE(iaddrs, ia, next);
ipv6_deleteaddr(ap); ipv6_freeaddr(ia);
i++;
}
eloop_q_timeout_delete(ap->iface->ctx->eloop,
0, NULL, ap);
if (ap->flags & IPV6_AF_REQUEST) {
ap->flags &= ~IPV6_AF_ADDED;
} else {
TAILQ_REMOVE(addrs, ap, next);
ipv6_freeaddr(ap);
}
} else if (!(ap->flags & IPV6_AF_STALE) &&
!IN6_IS_ADDR_UNSPECIFIED(&ap->addr))
{
if (ap->flags & IPV6_AF_NEW)
i++;
if (!timespecisset(&now))
clock_gettime(CLOCK_MONOTONIC, &now);
ipv6_addaddr(ap, &now);
} }
} }
return i; return i;
} }
@ -1544,6 +1555,10 @@ ipv6_newaddr(struct interface *ifp, const struct in6_addr *addr,
ia->prefix_len = prefix_len; ia->prefix_len = prefix_len;
ia->dhcp6_fd = -1; ia->dhcp6_fd = -1;
#ifndef SMALL
TAILQ_INIT(&ia->pd_pfxs);
#endif
#ifdef IPV6_AF_TEMPORARY #ifdef IPV6_AF_TEMPORARY
tempaddr = ia->flags & IPV6_AF_TEMPORARY; tempaddr = ia->flags & IPV6_AF_TEMPORARY;
#else #else

1
external/bsd/dhcpcd/dist/src/ipv6.h vendored
View File

@ -262,6 +262,7 @@ void ipv6_checkaddrflags(void *);
void ipv6_markaddrsstale(struct interface *, unsigned int); void ipv6_markaddrsstale(struct interface *, unsigned int);
void ipv6_deletestaleaddrs(struct interface *); void ipv6_deletestaleaddrs(struct interface *);
int ipv6_addaddr(struct ipv6_addr *, const struct timespec *); int ipv6_addaddr(struct ipv6_addr *, const struct timespec *);
int ipv6_doaddr(struct ipv6_addr *, struct timespec *);
ssize_t ipv6_addaddrs(struct ipv6_addrhead *addrs); ssize_t ipv6_addaddrs(struct ipv6_addrhead *addrs);
void ipv6_deleteaddr(struct ipv6_addr *); void ipv6_deleteaddr(struct ipv6_addr *);
void ipv6_freedrop_addrs(struct ipv6_addrhead *, int, void ipv6_freedrop_addrs(struct ipv6_addrhead *, int,

2
external/bsd/dhcpcd/dist/src/ipv6nd.c vendored
View File

@ -652,7 +652,7 @@ ipv6nd_neighbour(struct dhcpcd_ctx *ctx, struct in6_addr *addr, bool reachable)
break; break;
} }
if (rap == NULL || rap->expired || rap->reachable == reachable) if (rap == NULL || rap->expired || rap->isreachable == reachable)
return; return;
rap->isreachable = reachable; rap->isreachable = reachable;