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_carrier(int carrier, int flags, const char *ifname)
{
struct interface *ifp;
if (!(options & DHCPCD_LINK))
return;
ifp = find_interface(ifname);
if (ifp == NULL) {
handle_interface(1, ifname);
return;
}
if (!(ifp->options->options & DHCPCD_LINK))
return;
if (carrier == LINK_UNKNOWN)
carrier = carrier_status(ifp); /* will set ifp->flags */
else
ifp->flags = flags;
if (carrier == LINK_UNKNOWN)
syslog(LOG_ERR, "%s: carrier_status: %m", ifname);
/* IFF_RUNNING is checked, if needed, earlier and is OS dependant */
else if (carrier == LINK_DOWN || (ifp->flags & IFF_UP) == 0) {
if (ifp->carrier != LINK_DOWN) {
if (ifp->carrier == LINK_UP)
syslog(LOG_INFO, "%s: carrier lost", ifp->name);
ifp->carrier = LINK_DOWN;
dhcp_close(ifp);
dhcp6_drop(ifp, "EXPIRE6");
ipv6rs_drop(ifp);
/* Don't blindly delete our knowledge of LL addresses.
* We need to listen to what the kernel does with
* them as some OS's will remove, mark tentative or
* do nothing. */
ipv6_free_ll_callbacks(ifp);
dhcp_drop(ifp, "NOCARRIER");
}
} else if (carrier == LINK_UP && ifp->flags & IFF_UP) {
if (ifp->carrier != LINK_UP) {
syslog(LOG_INFO, "%s: carrier acquired", ifp->name);
ifp->carrier = LINK_UP;
#if !defined(__linux__) && !defined(__NetBSD__)
/* BSD does not emit RTM_NEWADDR or RTM_CHGADDR when the
* hardware address changes so we have to go
* through the disovery process to work it out. */
handle_interface(0, ifp->name);
#endif
if (ifp->wireless)
getifssid(ifp->name, ifp->ssid);
configure_interface(ifp, margc, margv);
script_runreason(ifp, "CARRIER");
start_interface(ifp);
}
}
}
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
if_reboot(struct interface *ifp, int argc, char **argv)
{
int oldopts;
oldopts = ifp->options->options;
script_runreason(ifp, "RECONFIGURE");
configure_interface(ifp, argc, argv);
dhcp_reboot_newopts(ifp, oldopts);
dhcp6_reboot(ifp);
start_interface(ifp);
}
int main (int argc, char ** argv)
{
uint16_t *data, max = 0, min = 0;
unsigned int i, data_size;
/* Initialize SDL */
if (SDL_Init(SDL_INIT_TIMER | SDL_INIT_AUDIO | SDL_INIT_VIDEO))
{
fprintf(stderr, "Unable to initialize SDL: %s\n", SDL_GetError());
return 1;
}
/* Initialize libavcodec and all of the codecs */
av_register_all();
if (argc > 1)
{
data = load_file(argv[1], &data_size);
if ((data) && (data_size > 0))
{
printf("Managed to load file correctly!\n");
printf("Data size: %d\n", data_size);
min = max = data[0];
}
else
{
return 1;
}
for (i = 0; i < data_size; i++)
{
if (data[i] > max)
max = data[i];
if (data[i] < min)
min = data[i];
}
printf("max: %d, min: %d\n", max, min);
}
if (data)
{
start_interface();
}
else
{
fprintf(stderr, "No data to display!\n");
return 1;
}
SDL_Quit();
return 0;
}
int loopback_setup(void) {
int r, if_loopback;
union {
struct sockaddr sa;
struct sockaddr_nl nl;
struct sockaddr_storage storage;
} sa;
unsigned requests = 0, i;
int fd;
errno = 0;
if ((if_loopback = (int) if_nametoindex("lo")) <= 0)
return errno ? -errno : -ENODEV;
if ((fd = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE)) < 0)
return -errno;
zero(sa);
sa.nl.nl_family = AF_NETLINK;
if (bind(fd, &sa.sa, sizeof(sa)) < 0) {
r = -errno;
goto finish;
}
if ((r = add_adresses(fd, if_loopback, &requests)) < 0)
goto finish;
if ((r = start_interface(fd, if_loopback, &requests)) < 0)
goto finish;
for (i = 0; i < requests; i++) {
if ((r = read_response(fd, requests)) < 0)
goto finish;
}
r = 0;
finish:
if (r < 0)
log_warning("Failed to configure loopback device: %s", strerror(-r));
if (fd >= 0)
close_nointr_nofail(fd);
return r;
}
static int add_adresses(int fd, int if_loopback, unsigned *requests) {
union {
struct sockaddr sa;
struct sockaddr_nl nl;
} sa = {
.nl.nl_family = AF_NETLINK,
};
union {
struct nlmsghdr header;
uint8_t buf[NLMSG_ALIGN(sizeof(struct nlmsghdr)) +
NLMSG_ALIGN(sizeof(struct ifaddrmsg)) +
RTA_LENGTH(sizeof(struct in6_addr))];
} request = {
.header.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifaddrmsg)),
.header.nlmsg_type = RTM_NEWADDR,
.header.nlmsg_flags = NLM_F_REQUEST|NLM_F_CREATE|NLM_F_ACK,
.header.nlmsg_seq = *requests + 1,
};
struct ifaddrmsg *ifaddrmsg;
uint32_t ipv4_address = htonl(INADDR_LOOPBACK);
int r;
ifaddrmsg = NLMSG_DATA(&request.header);
ifaddrmsg->ifa_family = AF_INET;
ifaddrmsg->ifa_prefixlen = 8;
ifaddrmsg->ifa_flags = IFA_F_PERMANENT;
ifaddrmsg->ifa_scope = RT_SCOPE_HOST;
ifaddrmsg->ifa_index = if_loopback;
r = add_rtattr(&request.header, sizeof(request), IFA_LOCAL,
&ipv4_address, sizeof(ipv4_address));
if (r < 0)
return r;
if (sendto_loop(fd, &request, request.header.nlmsg_len, 0, &sa.sa, sizeof(sa)) < 0)
return -errno;
(*requests)++;
if (!socket_ipv6_is_supported())
return 0;
request.header.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifaddrmsg));
request.header.nlmsg_seq = *requests + 1;
ifaddrmsg->ifa_family = AF_INET6;
ifaddrmsg->ifa_prefixlen = 128;
r = add_rtattr(&request.header, sizeof(request), IFA_LOCAL,
&in6addr_loopback, sizeof(in6addr_loopback));
if (r < 0)
return r;
if (sendto_loop(fd, &request, request.header.nlmsg_len, 0, &sa.sa, sizeof(sa)) < 0)
return -errno;
(*requests)++;
return 0;
}
static int start_interface(int fd, int if_loopback, unsigned *requests) {
union {
struct sockaddr sa;
struct sockaddr_nl nl;
} sa = {
.nl.nl_family = AF_NETLINK,
};
union {
struct nlmsghdr header;
uint8_t buf[NLMSG_ALIGN(sizeof(struct nlmsghdr)) +
NLMSG_ALIGN(sizeof(struct ifinfomsg))];
} request = {
.header.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
.header.nlmsg_type = RTM_NEWLINK,
.header.nlmsg_flags = NLM_F_REQUEST|NLM_F_ACK,
.header.nlmsg_seq = *requests + 1,
};
struct ifinfomsg *ifinfomsg;
ifinfomsg = NLMSG_DATA(&request.header);
ifinfomsg->ifi_family = AF_UNSPEC;
ifinfomsg->ifi_index = if_loopback;
ifinfomsg->ifi_flags = IFF_UP;
ifinfomsg->ifi_change = IFF_UP;
if (sendto_loop(fd, &request, request.header.nlmsg_len, 0, &sa.sa, sizeof(sa)) < 0)
return -errno;
(*requests)++;
return 0;
}
static int read_response(int fd, unsigned requests_max) {
union {
struct sockaddr sa;
struct sockaddr_nl nl;
} sa;
union {
struct nlmsghdr header;
uint8_t buf[NLMSG_ALIGN(sizeof(struct nlmsghdr)) +
NLMSG_ALIGN(sizeof(struct nlmsgerr))];
} response;
ssize_t l;
socklen_t sa_len = sizeof(sa);
struct nlmsgerr *nlmsgerr;
l = recvfrom_loop(fd, &response, sizeof(response), 0, &sa.sa, &sa_len);
if (l < 0)
return -errno;
if (sa_len != sizeof(sa.nl) ||
sa.nl.nl_family != AF_NETLINK)
return -EIO;
if (sa.nl.nl_pid != 0)
return 0;
if ((size_t) l < sizeof(struct nlmsghdr))
return -EIO;
if (response.header.nlmsg_type != NLMSG_ERROR ||
(pid_t) response.header.nlmsg_pid != getpid() ||
response.header.nlmsg_seq >= requests_max)
return 0;
if ((size_t) l < NLMSG_LENGTH(sizeof(struct nlmsgerr)) ||
response.header.nlmsg_len < NLMSG_LENGTH(sizeof(struct nlmsgerr)))
return -EIO;
nlmsgerr = NLMSG_DATA(&response.header);
if (nlmsgerr->error < 0 && nlmsgerr->error != -EEXIST)
return nlmsgerr->error;
return response.header.nlmsg_seq;
}
static int check_loopback(void) {
int r;
_cleanup_close_ int fd;
union {
struct sockaddr sa;
struct sockaddr_in in;
} sa = {
.in.sin_family = AF_INET,
.in.sin_addr.s_addr = INADDR_LOOPBACK,
};
/* If we failed to set up the loop back device, check whether
* it might already be set up */
fd = socket(AF_INET, SOCK_DGRAM|SOCK_NONBLOCK|SOCK_CLOEXEC, 0);
if (fd < 0)
return -errno;
if (bind(fd, &sa.sa, sizeof(sa.in)) >= 0)
r = 1;
else
r = errno == EADDRNOTAVAIL ? 0 : -errno;
return r;
}
int loopback_setup(void) {
int r, if_loopback;
union {
struct sockaddr sa;
struct sockaddr_nl nl;
} sa = {
.nl.nl_family = AF_NETLINK,
};
unsigned requests = 0, i;
_cleanup_close_ int fd = -1;
bool eperm = false;
errno = 0;
if_loopback = (int) if_nametoindex("lo");
if (if_loopback <= 0)
return errno ? -errno : -ENODEV;
fd = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
if (fd < 0)
return -errno;
if (bind(fd, &sa.sa, sizeof(sa)) < 0) {
r = -errno;
goto error;
}
r = add_adresses(fd, if_loopback, &requests);
if (r < 0)
goto error;
r = start_interface(fd, if_loopback, &requests);
if (r < 0)
goto error;
for (i = 0; i < requests; i++) {
r = read_response(fd, requests);
if (r == -EPERM)
eperm = true;
else if (r < 0)
goto error;
}
if (eperm && check_loopback() < 0) {
r = -EPERM;
goto error;
}
return 0;
error:
log_warning("Failed to configure loopback device: %s", strerror(-r));
return r;
}
