#include <time.h>
#include <errno.h>
+#include <ctype.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <syslog.h>
#include <signal.h>
#include <string.h>
+#include <strings.h>
#include <stdbool.h>
#include <net/if.h>
-#include <sys/wait.h>
#include <sys/syscall.h>
#include <arpa/inet.h>
+#include <linux/if_addr.h>
#include "odhcp6c.h"
#include "ra.h"
-#ifdef EXT_BFD_PING
-#include "bfd.h"
-#endif
+#ifndef IN6_IS_ADDR_UNIQUELOCAL
+#define IN6_IS_ADDR_UNIQUELOCAL(a) \
+ ((((__const uint32_t *) (a))[0] & htonl (0xfe000000)) \
+ == htonl (0xfc000000))
+#endif
static void sighandler(int signal);
static int usage(void);
static volatile bool signal_term = false;
static int urandom_fd = -1, allow_slaac_only = 0;
-static bool bound = false, release = true;
+static bool bound = false, release = true, ra = false;
static time_t last_update = 0;
+static char *ifname = NULL;
static unsigned int min_update_interval = DEFAULT_MIN_UPDATE_INTERVAL;
+static unsigned int script_sync_delay = 10;
+static unsigned int script_accu_delay = 1;
int main(_unused int argc, char* const argv[])
{
int ia_pd_iaid_index = 0;
static struct in6_addr ifid = IN6ADDR_ANY_INIT;
int sol_timeout = DHCPV6_SOL_MAX_RT;
+ int verbosity = 0;
-#ifdef EXT_BFD_PING
- int bfd_interval = 0, bfd_loss = 3;
-#endif
bool help = false, daemonize = false;
int logopt = LOG_PID;
int c;
unsigned int client_options = DHCPV6_CLIENT_FQDN | DHCPV6_ACCEPT_RECONFIGURE;
+ unsigned int ra_options = RA_RDNSS_DEFAULT_LIFETIME;
- while ((c = getopt(argc, argv, "S::N:V:P:FB:c:i:r:Ru:s:kt:m:hedp:fa")) != -1) {
+ while ((c = getopt(argc, argv, "S::N:V:P:FB:c:i:r:Ru:s:kt:m:Lhedp:fav")) != -1) {
switch (c) {
case 'S':
allow_slaac_only = (optarg) ? atoi(optarg) : -1;
ia_pd_mode = IA_MODE_FORCE;
break;
-#ifdef EXT_BFD_PING
- case 'B':
- bfd_interval = atoi(optarg);
- break;
-#endif
-
case 'c':
l = script_unhexlify(&buf[4], sizeof(buf) - 4, optarg);
if (l > 0) {
min_update_interval = atoi(optarg);
break;
+ case 'L':
+ ra_options &= ~RA_RDNSS_DEFAULT_LIFETIME;
+ break;
+
case 'e':
logopt |= LOG_PERROR;
break;
client_options &= ~DHCPV6_ACCEPT_RECONFIGURE;
break;
+ case 'v':
+ ++verbosity;
+ break;
+
default:
help = true;
break;
}
}
+ if (allow_slaac_only > 0)
+ script_sync_delay = allow_slaac_only;
+
openlog("odhcp6c", logopt, LOG_DAEMON);
- const char *ifname = argv[optind];
+ if (!verbosity)
+ setlogmask(LOG_UPTO(LOG_WARNING));
+
+ ifname = argv[optind];
if (help || !ifname)
return usage();
signal(SIGIO, sighandler);
signal(SIGHUP, sighandler);
signal(SIGINT, sighandler);
- signal(SIGCHLD, sighandler);
signal(SIGTERM, sighandler);
signal(SIGUSR1, sighandler);
signal(SIGUSR2, sighandler);
if ((urandom_fd = open("/dev/urandom", O_CLOEXEC | O_RDONLY)) < 0 ||
init_dhcpv6(ifname, client_options, sol_timeout) ||
- ra_init(ifname, &ifid) || script_init(script, ifname)) {
+ ra_init(ifname, &ifid, ra_options) ||
+ script_init(script, ifname)) {
syslog(LOG_ERR, "failed to initialize: %s", strerror(errno));
return 3;
}
return 4;
}
- char pidbuf[128];
if (!pidfile) {
- snprintf(pidbuf, sizeof(pidbuf),
- "/var/run/odhcp6c.%s.pid", ifname);
- pidfile = pidbuf;
+ snprintf((char*)buf, sizeof(buf), "/var/run/odhcp6c.%s.pid", ifname);
+ pidfile = (char*)buf;
}
- int fd = open(pidfile, O_WRONLY | O_CREAT, 0644);
- if (fd >= 0) {
- char buf[8];
- int len = snprintf(buf, sizeof(buf), "%i\n", getpid());
- write(fd, buf, len);
- close(fd);
+ FILE *fp = fopen(pidfile, "w");
+ if (fp) {
+ fprintf(fp, "%i\n", getpid());
+ fclose(fp);
}
}
- script_call("started");
+ script_call("started", 0, false);
while (!signal_term) { // Main logic
odhcp6c_clear_state(STATE_SERVER_ID);
+ odhcp6c_clear_state(STATE_SERVER_ADDR);
odhcp6c_clear_state(STATE_IA_NA);
odhcp6c_clear_state(STATE_IA_PD);
odhcp6c_clear_state(STATE_SNTP_IP);
odhcp6c_clear_state(STATE_NTP_FQDN);
odhcp6c_clear_state(STATE_SIP_IP);
odhcp6c_clear_state(STATE_SIP_FQDN);
- dhcpv6_set_ia_mode(ia_na_mode, ia_pd_mode);
bound = false;
syslog(LOG_NOTICE, "(re)starting transaction on %s", ifname);
signal_usr1 = signal_usr2 = false;
- int mode = dhcpv6_request(DHCPV6_MSG_SOLICIT);
+ int mode = dhcpv6_set_ia_mode(ia_na_mode, ia_pd_mode);
+ if (mode != DHCPV6_STATELESS)
+ mode = dhcpv6_request(DHCPV6_MSG_SOLICIT);
odhcp6c_signal_process();
if (mode < 0)
while (!signal_usr2 && !signal_term) {
signal_usr1 = false;
- script_call("informed");
+ script_call("informed", script_sync_delay, true);
int res = dhcpv6_poll_reconfigure();
odhcp6c_signal_process();
break;
case DHCPV6_STATEFUL:
- script_call("bound");
bound = true;
+ script_call("bound", script_sync_delay, true);
syslog(LOG_NOTICE, "entering stateful-mode on %s", ifname);
-#ifdef EXT_BFD_PING
- if (bfd_interval > 0)
- bfd_start(ifname, bfd_loss, bfd_interval);
-#endif
while (!signal_usr2 && !signal_term) {
// Renew Cycle
int res = dhcpv6_poll_reconfigure();
odhcp6c_signal_process();
if (res > 0) {
- script_call("updated");
+ script_call("updated", 0, false);
continue;
}
break; // Other signal type
// Send renew as T1 expired
- size_t ia_pd_len, ia_na_len;
- odhcp6c_get_state(STATE_IA_PD, &ia_pd_len);
- odhcp6c_get_state(STATE_IA_NA, &ia_na_len);
-
- // If we have any IAs, send renew, otherwise request
- if (ia_pd_len == 0 && ia_na_len == 0)
- res = dhcpv6_request(DHCPV6_MSG_REQUEST);
- else
- res = dhcpv6_request(DHCPV6_MSG_RENEW);
-
+ res = dhcpv6_request(DHCPV6_MSG_RENEW);
odhcp6c_signal_process();
if (res > 0) { // Renew was succesfull
// Publish updates
- script_call("updated");
+ script_call("updated", 0, false);
continue; // Renew was successful
}
odhcp6c_clear_state(STATE_SERVER_ID); // Remove binding
+ odhcp6c_clear_state(STATE_SERVER_ADDR);
+
+ size_t ia_pd_len, ia_na_len;
+ odhcp6c_get_state(STATE_IA_PD, &ia_pd_len);
+ odhcp6c_get_state(STATE_IA_NA, &ia_na_len);
+
+ if (ia_pd_len == 0 && ia_na_len == 0)
+ break;
// If we have IAs, try rebind otherwise restart
res = dhcpv6_request(DHCPV6_MSG_REBIND);
odhcp6c_signal_process();
if (res > 0)
- script_call("rebound");
+ script_call("rebound", 0, true);
else {
-#ifdef EXT_BFD_PING
- bfd_stop();
-#endif
break;
}
}
break;
}
+ odhcp6c_expire();
+
size_t ia_pd_len, ia_na_len, server_id_len;
odhcp6c_get_state(STATE_IA_PD, &ia_pd_len);
odhcp6c_get_state(STATE_IA_NA, &ia_na_len);
// Add all prefixes to lost prefixes
bound = false;
- script_call("unbound");
+ script_call("unbound", 0, true);
if (server_id_len > 0 && (ia_pd_len > 0 || ia_na_len > 0) && release)
dhcpv6_request(DHCPV6_MSG_RELEASE);
odhcp6c_clear_state(STATE_IA_PD);
}
- script_call("stopped");
+ script_call("stopped", 0, true);
return 0;
}
" -P <length> Request IPv6-Prefix (0 = auto)\n"
" -F Force IPv6-Prefix\n"
" -V <class> Set vendor-class option (base-16 encoded)\n"
-#ifdef EXT_BFD_PING
- " -B <interval> Enable BFD ping check\n"
-#endif
- " -c <clientid> Override client-ID (base-16 encoded)\n"
+ " -u <user-class> Set user-class option string\n"
+ " -c <clientid> Override client-ID (base-16 encoded 16-bit type + value)\n"
" -i <iface-id> Use a custom interface identifier for RA handling\n"
" -r <options> Options to be requested (comma-separated)\n"
" -R Do not request any options except those specified with -r\n"
" -a Don't send Accept Reconfigure option\n"
" -f Don't send Client FQDN option\n"
" -k Don't send a RELEASE when stopping\n"
- " -t <seconds> Maximum timeout for DHCPv6-SOLICIT (3600)\n"
+ " -t <seconds> Maximum timeout for DHCPv6-SOLICIT (120)\n"
" -m <seconds> Minimum time between accepting updates (30)\n"
+ " -L Ignore default lifetime for RDNSS records\n"
"\nInvocation options:\n"
" -p <pidfile> Set pidfile (/var/run/odhcp6c.pid)\n"
" -d Daemonize\n"
" -e Write logmessages to stderr\n"
- //" -v Increase logging verbosity\n"
+ " -v Increase logging verbosity\n"
" -h Show this help\n\n";
- write(STDERR_FILENO, buf, sizeof(buf));
+ fputs(buf, stderr);
return 1;
}
{
struct timespec t = {0, 0};
syscall(SYS_clock_gettime, CLOCK_MONOTONIC, &t);
- return t.tv_sec * 1000 + t.tv_nsec / 1000000;
+ return ((uint64_t)t.tv_sec) * 1000 + ((uint64_t)t.tv_nsec) / 1000000;
}
bool ra_updated = ra_process();
- if (ra_link_up())
+ if (ra_link_up()) {
signal_usr2 = true;
+ ra = false;
+ }
- if (ra_updated && (bound || allow_slaac_only == 0))
- script_call("ra-updated"); // Immediate process urgent events
- else if (ra_updated && !bound && allow_slaac_only > 0)
- script_delay_call("ra-updated", allow_slaac_only);
-
-#ifdef EXT_BFD_PING
- bfd_receive();
-#endif
+ if (ra_updated && (bound || allow_slaac_only >= 0)) {
+ script_call("ra-updated", (!ra && !bound) ?
+ script_sync_delay : script_accu_delay, false);
+ ra = true;
+ }
}
return signal_usr1 || signal_usr2 || signal_term;
memcpy(n, data, len);
}
-void odhcp6c_insert_state(enum odhcp6c_state state, size_t offset, const void *data, size_t len)
+int odhcp6c_insert_state(enum odhcp6c_state state, size_t offset, const void *data, size_t len)
{
ssize_t len_after = state_len[state] - offset;
if (len_after < 0)
- return;
+ return -1;
uint8_t *n = odhcp6c_resize_state(state, len);
if (n) {
memmove(sdata + offset + len, sdata + offset, len_after);
memcpy(sdata + offset, data, len);
}
+
+ return 0;
}
size_t odhcp6c_remove_state(enum odhcp6c_state state, size_t offset, size_t len)
}
-struct odhcp6c_entry* odhcp6c_find_entry(enum odhcp6c_state state, const struct odhcp6c_entry *new)
+static struct odhcp6c_entry* odhcp6c_find_entry(enum odhcp6c_state state, const struct odhcp6c_entry *new)
{
- size_t len, cmplen = offsetof(struct odhcp6c_entry, target) + new->length / 8;
- struct odhcp6c_entry *start = odhcp6c_get_state(state, &len);
- struct odhcp6c_entry *x = NULL;
-
- for (struct odhcp6c_entry *c = start; !x && c < &start[len/sizeof(*c)]; ++c)
- if (!memcmp(c, new, cmplen))
+ size_t len, cmplen = offsetof(struct odhcp6c_entry, target) + ((new->length + 7) / 8);
+ uint8_t *start = odhcp6c_get_state(state, &len);
+
+ for (struct odhcp6c_entry *c = (struct odhcp6c_entry*)start;
+ (uint8_t*)c < &start[len] &&
+ (uint8_t*)odhcp6c_next_entry(c) <= &start[len];
+ c = odhcp6c_next_entry(c))
+ if (!memcmp(c, new, cmplen) && !memcmp(c->auxtarget, new->auxtarget, new->auxlen))
return c;
return NULL;
}
-bool odhcp6c_update_entry_safe(enum odhcp6c_state state, struct odhcp6c_entry *new, uint32_t safe)
+bool odhcp6c_update_entry(enum odhcp6c_state state, struct odhcp6c_entry *new,
+ uint32_t safe, bool filterexcess)
{
size_t len;
struct odhcp6c_entry *x = odhcp6c_find_entry(state, new);
- struct odhcp6c_entry *start = odhcp6c_get_state(state, &len);
+ uint8_t *start = odhcp6c_get_state(state, &len);
if (x && x->valid > new->valid && new->valid < safe)
new->valid = safe;
if (new->valid > 0) {
if (x) {
- if (new->valid >= x->valid && new->valid != UINT32_MAX &&
+ if (filterexcess && new->valid >= x->valid &&
+ new->valid != UINT32_MAX &&
new->valid - x->valid < min_update_interval &&
new->preferred >= x->preferred &&
new->preferred != UINT32_MAX &&
- new->preferred - x->preferred < min_update_interval &&
- x->class == new->class)
+ new->preferred - x->preferred < min_update_interval)
return false;
x->valid = new->valid;
x->preferred = new->preferred;
x->t1 = new->t1;
x->t2 = new->t2;
- x->class = new->class;
x->iaid = new->iaid;
} else {
- odhcp6c_add_state(state, new, sizeof(*new));
+ odhcp6c_add_state(state, new, odhcp6c_entry_size(new));
}
} else if (x) {
- odhcp6c_remove_state(state, (x - start) * sizeof(*x), sizeof(*x));
+ odhcp6c_remove_state(state, ((uint8_t*)x) - start, odhcp6c_entry_size(x));
}
return true;
}
-bool odhcp6c_update_entry(enum odhcp6c_state state, struct odhcp6c_entry *new)
-{
- return odhcp6c_update_entry_safe(state, new, 0);
-}
-
-
static void odhcp6c_expire_list(enum odhcp6c_state state, uint32_t elapsed)
{
size_t len;
- struct odhcp6c_entry *start = odhcp6c_get_state(state, &len);
- for (struct odhcp6c_entry *c = start; c < &start[len / sizeof(*c)]; ++c) {
+ uint8_t *start = odhcp6c_get_state(state, &len);
+ for (struct odhcp6c_entry *c = (struct odhcp6c_entry*)start;
+ (uint8_t*)c < &start[len] &&
+ (uint8_t*)odhcp6c_next_entry(c) <= &start[len];
+ ) {
if (c->t1 < elapsed)
c->t1 = 0;
else if (c->t1 != UINT32_MAX)
else if (c->valid != UINT32_MAX)
c->valid -= elapsed;
- if (!c->valid)
- odhcp6c_remove_state(state, (c - start) * sizeof(*c), sizeof(*c));
+ if (!c->valid) {
+ odhcp6c_remove_state(state, ((uint8_t*)c) - start, odhcp6c_entry_size(c));
+ start = odhcp6c_get_state(state, &len);
+ } else {
+ c = odhcp6c_next_entry(c);
+ }
}
}
odhcp6c_expire_list(STATE_RA_PREFIX, elapsed);
odhcp6c_expire_list(STATE_RA_ROUTE, elapsed);
odhcp6c_expire_list(STATE_RA_DNS, elapsed);
+ odhcp6c_expire_list(STATE_RA_SEARCH, elapsed);
odhcp6c_expire_list(STATE_IA_NA, elapsed);
odhcp6c_expire_list(STATE_IA_PD, elapsed);
}
}
-void odhcp6c_random(void *buf, size_t len)
+int odhcp6c_random(void *buf, size_t len)
{
- read(urandom_fd, buf, len);
+ return read(urandom_fd, buf, len);
}
bool odhcp6c_is_bound(void)
return bound;
}
+bool odhcp6c_addr_in_scope(const struct in6_addr *addr)
+{
+ FILE *fd = fopen("/proc/net/if_inet6", "r");
+ int len;
+ char buf[256];
+
+ if (fd == NULL)
+ return false;
+
+ while (fgets(buf, sizeof(buf), fd)) {
+ struct in6_addr inet6_addr;
+ uint32_t flags, dummy;
+ unsigned int i;
+ char name[8], addr_buf[32];
+
+ len = strlen(buf);
+
+ if ((len <= 0) || buf[len - 1] != '\n')
+ return false;
+
+ buf[--len] = '\0';
+
+ if (sscanf(buf, "%s %x %x %x %x %s",
+ addr_buf, &dummy, &dummy, &dummy, &flags, name) != 6)
+ return false;
+
+ if (strcmp(name, ifname) ||
+ (flags & (IFA_F_DADFAILED | IFA_F_TENTATIVE | IFA_F_DEPRECATED)))
+ continue;
+
+ for (i = 0; i < sizeof(addr_buf); i++) {
+ if (!isxdigit(addr_buf[i]) || isupper(addr_buf[i]))
+ return false;
+ }
+
+ memset(&inet6_addr, 0, sizeof(inet6_addr));
+ for (i = 0; i < (sizeof(addr_buf) / 2); i++) {
+ unsigned char byte;
+ static const char hex[] = "0123456789abcdef";
+ byte = ((index(hex, addr_buf[i * 2]) - hex) << 4) |
+ (index(hex, addr_buf[i * 2 + 1]) - hex);
+ inet6_addr.s6_addr[i] = byte;
+ }
+
+ if ((IN6_IS_ADDR_LINKLOCAL(&inet6_addr) == IN6_IS_ADDR_LINKLOCAL(addr)) &&
+ (IN6_IS_ADDR_UNIQUELOCAL(&inet6_addr) == IN6_IS_ADDR_UNIQUELOCAL(addr)))
+ return true;
+ }
+ return false;
+}
+
static void sighandler(int signal)
{
- if (signal == SIGCHLD)
- while (waitpid(-1, NULL, WNOHANG) > 0);
- else if (signal == SIGUSR1)
+ if (signal == SIGUSR1)
signal_usr1 = true;
else if (signal == SIGUSR2)
signal_usr2 = true;
projects / project / odhcp6c.git / blobdiff