static void
reconf_reboot(int action, int argc, char **argv, int oi)
{
struct if_head *ifs;
struct interface *ifn, *ifp;
ifs = discover_interfaces(argc - oi, argv + oi);
if (ifs == NULL)
return;
while ((ifp = TAILQ_FIRST(ifs))) {
TAILQ_REMOVE(ifs, ifp, next);
ifn = find_interface(ifp->name);
if (ifn) {
if (action)
if_reboot(ifn, argc, argv);
else
ipv4_applyaddr(ifn);
free_interface(ifp);
} else {
init_state(ifp, argc, argv);
TAILQ_INSERT_TAIL(ifaces, ifp, next);
start_interface(ifp);
}
}
free(ifs);
sort_interfaces();
}
void
handle_interface(int action, const char *ifname)
{
struct if_head *ifs;
struct interface *ifp, *ifn, *ifl = NULL;
const char * const argv[] = { ifname };
int i;
if (action == -1) {
ifp = find_interface(ifname);
if (ifp != NULL) {
ifp->options->options |= DHCPCD_DEPARTED;
stop_interface(ifp);
}
return;
}
/* If running off an interface list, check it's in it. */
if (ifc) {
for (i = 0; i < ifc; i++)
if (strcmp(ifv[i], ifname) == 0)
break;
if (i >= ifc)
return;
}
ifs = discover_interfaces(-1, UNCONST(argv));
TAILQ_FOREACH_SAFE(ifp, ifs, next, ifn) {
if (strcmp(ifp->name, ifname) != 0)
continue;
/* Check if we already have the interface */
ifl = find_interface(ifp->name);
if (ifl) {
/* The flags and hwaddr could have changed */
ifl->flags = ifp->flags;
ifl->hwlen = ifp->hwlen;
if (ifp->hwlen != 0)
memcpy(ifl->hwaddr, ifp->hwaddr, ifl->hwlen);
} else {
TAILQ_REMOVE(ifs, ifp, next);
TAILQ_INSERT_TAIL(ifaces, ifp, next);
}
if (action == 1) {
init_state(ifp, margc, margv);
start_interface(ifp);
}
}
/* Free our discovered list */
while ((ifp = TAILQ_FIRST(ifs))) {
TAILQ_REMOVE(ifs, ifp, next);
free_interface(ifp);
}
free(ifs);
}
static void
cleanup(void)
{
#ifdef DEBUG_MEMORY
struct interface *ifp;
int i;
free(duid);
free_options(if_options);
if (ifaces) {
while ((ifp = TAILQ_FIRST(ifaces))) {
TAILQ_REMOVE(ifaces, ifp, next);
free_interface(ifp);
}
free(ifaces);
}
for (i = 0; i < ifac; i++)
free(ifav[i]);
free(ifav);
for (i = 0; i < ifdc; i++)
free(ifdv[i]);
free(ifdv);
#endif
if (!(options & DHCPCD_FORKED))
dev_stop();
if (linkfd != -1)
close(linkfd);
if (pidfd > -1) {
if (options & DHCPCD_MASTER) {
if (control_stop() == -1)
syslog(LOG_ERR, "control_stop: %m");
}
close(pidfd);
unlink(pidfile);
}
#ifdef DEBUG_MEMORY
free(pidfile);
#endif
if (options & DHCPCD_STARTED && !(options & DHCPCD_FORKED))
syslog(LOG_INFO, "exited");
}
static void
stop_interface(struct interface *ifp)
{
syslog(LOG_INFO, "%s: removing interface", ifp->name);
ifp->options->options |= DHCPCD_STOPPING;
// Remove the interface from our list
TAILQ_REMOVE(ifaces, ifp, next);
dhcp6_drop(ifp, NULL);
ipv6rs_drop(ifp);
dhcp_drop(ifp, "STOP");
dhcp_close(ifp);
eloop_timeout_delete(NULL, ifp);
if (ifp->options->options & DHCPCD_DEPARTED)
script_runreason(ifp, "DEPARTED");
free_interface(ifp);
if (!(options & (DHCPCD_MASTER | DHCPCD_TEST)))
exit(EXIT_FAILURE);
}
struct if_head *
discover_interfaces(struct dhcpcd_ctx *ctx, int argc, char * const *argv)
{
struct ifaddrs *ifaddrs, *ifa;
char *p;
int i, sdl_type;
struct if_head *ifs;
struct interface *ifp;
#ifdef __linux__
char ifn[IF_NAMESIZE];
#endif
#ifdef INET
const struct sockaddr_in *addr;
const struct sockaddr_in *net;
const struct sockaddr_in *dst;
#endif
#ifdef INET6
const struct sockaddr_in6 *sin6;
int ifa_flags;
#endif
#ifdef AF_LINK
const struct sockaddr_dl *sdl;
#ifdef SIOCGIFPRIORITY
struct ifreq ifr;
int s_inet;
#endif
#ifdef IFLR_ACTIVE
struct if_laddrreq iflr;
int s_link;
#endif
#ifdef SIOCGIFPRIORITY
if ((s_inet = socket(AF_INET, SOCK_DGRAM, 0)) == -1)
return NULL;
#endif
#ifdef IFLR_ACTIVE
if ((s_link = socket(AF_LINK, SOCK_DGRAM, 0)) == -1) {
#ifdef SIOCGIFPRIORITY
close(s_inet);
#endif
return NULL;
}
memset(&iflr, 0, sizeof(iflr));
#endif
#elif AF_PACKET
const struct sockaddr_ll *sll;
#endif
if (getifaddrs(&ifaddrs) == -1)
return NULL;
ifs = malloc(sizeof(*ifs));
if (ifs == NULL)
return NULL;
TAILQ_INIT(ifs);
for (ifa = ifaddrs; ifa; ifa = ifa->ifa_next) {
if (ifa->ifa_addr != NULL) {
#ifdef AF_LINK
if (ifa->ifa_addr->sa_family != AF_LINK)
continue;
#elif AF_PACKET
if (ifa->ifa_addr->sa_family != AF_PACKET)
continue;
#endif
}
/* Ensure that the interface name has settled */
if (!dev_initialized(ctx, ifa->ifa_name))
continue;
/* It's possible for an interface to have >1 AF_LINK.
* For our purposes, we use the first one. */
TAILQ_FOREACH(ifp, ifs, next) {
if (strcmp(ifp->name, ifa->ifa_name) == 0)
break;
}
if (ifp)
continue;
if (argc > 0) {
for (i = 0; i < argc; i++) {
#ifdef __linux__
/* Check the real interface name */
strlcpy(ifn, argv[i], sizeof(ifn));
p = strchr(ifn, ':');
if (p)
*p = '\0';
if (strcmp(ifn, ifa->ifa_name) == 0)
break;
#else
if (strcmp(argv[i], ifa->ifa_name) == 0)
break;
#endif
}
if (i == argc)
continue;
p = argv[i];
} else {
p = ifa->ifa_name;
/* -1 means we're discovering against a specific
* interface, but we still need the below rules
* to apply. */
if (argc == -1 && strcmp(argv[0], ifa->ifa_name) != 0)
continue;
}
for (i = 0; i < ctx->ifdc; i++)
if (!fnmatch(ctx->ifdv[i], p, 0))
break;
if (i < ctx->ifdc)
continue;
for (i = 0; i < ctx->ifac; i++)
if (!fnmatch(ctx->ifav[i], p, 0))
break;
if (ctx->ifac && i == ctx->ifac)
continue;
if (if_vimaster(ifa->ifa_name) == 1) {
syslog(argc ? LOG_ERR : LOG_DEBUG,
"%s: is a Virtual Interface Master, skipping",
ifa->ifa_name);
continue;
}
ifp = calloc(1, sizeof(*ifp));
if (ifp == NULL) {
syslog(LOG_ERR, "%s: %m", __func__);
break;
}
ifp->ctx = ctx;
strlcpy(ifp->name, p, sizeof(ifp->name));
ifp->flags = ifa->ifa_flags;
/* Bring the interface up if not already */
if (!(ifp->flags & IFF_UP)
#ifdef SIOCGIFMEDIA
&& carrier_status(ifp) != LINK_UNKNOWN
#endif
)
{
if (up_interface(ifp) == 0)
ctx->options |= DHCPCD_WAITUP;
else
syslog(LOG_ERR, "%s: up_interface: %m",
ifp->name);
}
sdl_type = 0;
/* Don't allow loopback unless explicit */
if (ifp->flags & IFF_LOOPBACK) {
if (argc == 0 && ctx->ifac == 0) {
free_interface(ifp);
continue;
}
} else if (ifa->ifa_addr != NULL) {
#ifdef AF_LINK
sdl = (const struct sockaddr_dl *)(void *)ifa->ifa_addr;
#ifdef IFLR_ACTIVE
/* We need to check for active address */
strlcpy(iflr.iflr_name, ifp->name,
sizeof(iflr.iflr_name));
memcpy(&iflr.addr, ifa->ifa_addr,
MIN(ifa->ifa_addr->sa_len, sizeof(iflr.addr)));
iflr.flags = IFLR_PREFIX;
iflr.prefixlen = sdl->sdl_alen * NBBY;
if (ioctl(s_link, SIOCGLIFADDR, &iflr) == -1 ||
!(iflr.flags & IFLR_ACTIVE))
{
free_interface(ifp);
continue;
}
#endif
ifp->index = sdl->sdl_index;
sdl_type = sdl->sdl_type;
switch(sdl->sdl_type) {
case IFT_BRIDGE: /* FALLTHROUGH */
case IFT_L2VLAN: /* FALLTHOUGH */
case IFT_L3IPVLAN: /* FALLTHROUGH */
case IFT_ETHER:
ifp->family = ARPHRD_ETHER;
break;
case IFT_IEEE1394:
ifp->family = ARPHRD_IEEE1394;
break;
#ifdef IFT_INFINIBAND
case IFT_INFINIBAND:
ifp->family = ARPHRD_INFINIBAND;
break;
#endif
}
ifp->hwlen = sdl->sdl_alen;
#ifndef CLLADDR
# define CLLADDR(s) ((const char *)((s)->sdl_data + (s)->sdl_nlen))
#endif
memcpy(ifp->hwaddr, CLLADDR(sdl), ifp->hwlen);
#elif AF_PACKET
sll = (const struct sockaddr_ll *)(void *)ifa->ifa_addr;
ifp->index = sll->sll_ifindex;
ifp->family = sdl_type = sll->sll_hatype;
ifp->hwlen = sll->sll_halen;
if (ifp->hwlen != 0)
memcpy(ifp->hwaddr, sll->sll_addr, ifp->hwlen);
#endif
}
#ifdef __linux__
/* PPP addresses on Linux don't have hardware addresses */
else
ifp->index = if_nametoindex(ifp->name);
#endif
/* We only work on ethernet by default */
if (!(ifp->flags & IFF_POINTOPOINT) &&
ifp->family != ARPHRD_ETHER)
{
if (argc == 0 && ctx->ifac == 0) {
free_interface(ifp);
continue;
}
switch (ifp->family) {
case ARPHRD_IEEE1394: /* FALLTHROUGH */
case ARPHRD_INFINIBAND:
/* We don't warn for supported families */
break;
default:
syslog(LOG_WARNING,
"%s: unsupported interface type %.2x"
", falling back to ethernet",
ifp->name, sdl_type);
ifp->family = ARPHRD_ETHER;
break;
}
}
/* Handle any platform init for the interface */
if (if_init(ifp) == -1) {
syslog(LOG_ERR, "%s: if_init: %m", p);
free_interface(ifp);
continue;
}
/* Ensure that the MTU is big enough for DHCP */
if (get_mtu(ifp->name) < MTU_MIN &&
set_mtu(ifp->name, MTU_MIN) == -1)
{
syslog(LOG_ERR, "%s: set_mtu: %m", p);
free_interface(ifp);
continue;
}
#ifdef SIOCGIFPRIORITY
/* Respect the interface priority */
memset(&ifr, 0, sizeof(ifr));
strlcpy(ifr.ifr_name, ifp->name, sizeof(ifr.ifr_name));
if (ioctl(s_inet, SIOCGIFPRIORITY, &ifr) == 0)
ifp->metric = ifr.ifr_metric;
#else
/* We reserve the 100 range for virtual interfaces, if and when
* we can work them out. */
ifp->metric = 200 + ifp->index;
if (getifssid(ifp->name, ifp->ssid) != -1) {
ifp->wireless = 1;
ifp->metric += 100;
}
#endif
TAILQ_INSERT_TAIL(ifs, ifp, next);
}
for (ifa = ifaddrs; ifa; ifa = ifa->ifa_next) {
if (ifa->ifa_addr == NULL)
continue;
switch(ifa->ifa_addr->sa_family) {
#ifdef INET
case AF_INET:
addr = (const struct sockaddr_in *)
(void *)ifa->ifa_addr;
net = (const struct sockaddr_in *)
(void *)ifa->ifa_netmask;
if (ifa->ifa_flags & IFF_POINTOPOINT)
dst = (const struct sockaddr_in *)
(void *)ifa->ifa_dstaddr;
else
dst = NULL;
ipv4_handleifa(ctx, RTM_NEWADDR, ifs, ifa->ifa_name,
&addr->sin_addr,
&net->sin_addr,
dst ? &dst->sin_addr : NULL);
break;
#endif
#ifdef INET6
case AF_INET6:
sin6 = (const struct sockaddr_in6 *)
(void *)ifa->ifa_addr;
ifa_flags = in6_addr_flags(ifa->ifa_name,
&sin6->sin6_addr);
if (ifa_flags != -1)
ipv6_handleifa(ctx, RTM_NEWADDR, ifs,
ifa->ifa_name,
&sin6->sin6_addr, ifa_flags);
break;
#endif
}
}
freeifaddrs(ifaddrs);
#ifdef SIOCGIFPRIORITY
close(s_inet);
#endif
#ifdef IFLR_ACTIVE
close(s_link);
#endif
return ifs;
}
