#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"
#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 uint8_t *state_data[_STATE_MAX] = {NULL};
static size_t state_len[_STATE_MAX] = {0};
-static volatile int do_signal = 0;
+static volatile bool signal_io = false;
+static volatile bool signal_usr1 = false;
+static volatile bool signal_usr2 = false;
+static volatile bool signal_term = false;
+
static int urandom_fd = -1, allow_slaac_only = 0;
static bool bound = false, release = true;
static time_t last_update = 0;
-static char *ifname = NULL;
+
int main(_unused int argc, char* const argv[])
{
int bfd_interval = 0, bfd_loss = 3;
#endif
- bool help = false, daemonize = false;
+ bool help = false, daemonize = false, strict_options = false;
int logopt = LOG_PID;
int c, request_pd = 0;
- while ((c = getopt(argc, argv, "S::N:P:FB:c:i:r:s:kt:hedp:")) != -1) {
+ while ((c = getopt(argc, argv, "S::N:P:FB:c:i:r:Rs:kt:hedp:")) != -1) {
switch (c) {
case 'S':
allow_slaac_only = (optarg) ? atoi(optarg) : -1;
}
break;
+ case 'R':
+ strict_options = true;
+ break;
+
case 's':
script = optarg;
break;
}
openlog("odhcp6c", logopt, LOG_DAEMON);
- ifname = argv[optind];
+ const char *ifname = argv[optind];
if (help || !ifname)
return usage();
signal(SIGUSR2, sighandler);
if ((urandom_fd = open("/dev/urandom", O_CLOEXEC | O_RDONLY)) < 0 ||
- init_dhcpv6(ifname, request_pd, sol_timeout) ||
+ init_dhcpv6(ifname, request_pd, strict_options, sol_timeout) ||
ra_init(ifname, &ifid) || script_init(script, ifname)) {
syslog(LOG_ERR, "failed to initialize: %s", strerror(errno));
return 3;
script_call("started");
- while (do_signal != SIGTERM) { // Main logic
+ while (!signal_term) { // Main logic
odhcp6c_clear_state(STATE_SERVER_ID);
odhcp6c_clear_state(STATE_IA_NA);
odhcp6c_clear_state(STATE_IA_PD);
odhcp6c_clear_state(STATE_SNTP_IP);
- odhcp6c_clear_state(STATE_SNTP_FQDN);
+ odhcp6c_clear_state(STATE_NTP_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);
syslog(LOG_NOTICE, "(re)starting transaction on %s", ifname);
- do_signal = 0;
+ signal_usr1 = signal_usr2 = false;
int mode = dhcpv6_request(DHCPV6_MSG_SOLICIT);
odhcp6c_signal_process();
do {
int res = dhcpv6_request(mode == DHCPV6_STATELESS ?
DHCPV6_MSG_INFO_REQ : DHCPV6_MSG_REQUEST);
+ bool signalled = odhcp6c_signal_process();
- odhcp6c_signal_process();
if (res > 0)
break;
- else if (do_signal > 0) {
+ else if (signalled) {
mode = -1;
break;
}
bound = true;
syslog(LOG_NOTICE, "entering stateless-mode on %s", ifname);
- while (do_signal == 0 || do_signal == SIGUSR1) {
- do_signal = 0;
- script_call("informed");
+ while (!signal_usr2 && !signal_term) {
+ signal_usr1 = false;
+ script_call("informed");
int res = dhcpv6_poll_reconfigure();
odhcp6c_signal_process();
if (res > 0)
continue;
- if (do_signal == SIGUSR1) {
- do_signal = 0; // Acknowledged
+ if (signal_usr1) {
+ signal_usr1 = false; // Acknowledged
continue;
- } else if (do_signal > 0)
+ }
+ if (signal_usr2 || signal_term)
break;
res = dhcpv6_request(DHCPV6_MSG_INFO_REQ);
odhcp6c_signal_process();
- if (do_signal == SIGUSR1)
+ if (signal_usr1)
continue;
else if (res < 0)
break;
bfd_start(ifname, bfd_loss, bfd_interval);
#endif
- while (do_signal == 0 || do_signal == SIGUSR1) {
+ while (!signal_usr2 && !signal_term) {
// Renew Cycle
// Wait for T1 to expire or until we get a reconfigure
int res = dhcpv6_poll_reconfigure();
}
// Handle signal, if necessary
- if (do_signal == SIGUSR1)
- do_signal = 0; // Acknowledged
- else if (do_signal > 0)
+ if (signal_usr1)
+ signal_usr1 = false; // Acknowledged
+ if (signal_usr2 || signal_term)
break; // Other signal type
// Send renew as T1 expired
- res = dhcpv6_request(DHCPV6_MSG_RENEW);
+ 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);
+
odhcp6c_signal_process();
if (res > 0) { // Renew was succesfull
// Publish updates
script_call("updated");
continue; // Renew was successful
}
-
+
odhcp6c_clear_state(STATE_SERVER_ID); // Remove binding
// If we have IAs, try rebind otherwise restart
" -c <clientid> Override client-ID (base-16 encoded)\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"
" -s <script> Status update script (/usr/sbin/odhcp6c-update)\n"
" -k Don't send a RELEASE when stopping\n"
" -t <seconds> Maximum timeout for DHCPv6-SOLICIT (120)\n"
bool odhcp6c_signal_process(void)
{
- if (do_signal == SIGIO) {
- do_signal = 0;
+ while (signal_io) {
+ signal_io = false;
+
bool ra_updated = ra_process();
if (ra_link_up())
- do_signal = SIGUSR2;
+ signal_usr2 = true;
if (ra_updated && (bound || allow_slaac_only == 0))
script_call("ra-updated"); // Immediate process urgent events
#endif
}
- return do_signal != 0;
+ return signal_usr1 || signal_usr2 || signal_term;
}
uint8_t *n = odhcp6c_resize_state(state, len);
if (n) {
uint8_t *sdata = state_data[state];
-
+
memmove(sdata + offset + len, sdata + offset, len_after);
memcpy(sdata + offset, data, len);
}
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)
- do_signal = SIGUSR1;
+ signal_usr1 = true;
else if (signal == SIGUSR2)
- do_signal = SIGUSR2;
+ signal_usr2 = true;
else if (signal == SIGIO)
- do_signal = SIGIO;
+ signal_io = true;
else
- do_signal = SIGTERM;
+ signal_term = true;
}
projects / odhcp6c.git / blobdiff