#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/queue.h>
#include <sys/socket.h>
#include <sys/syslog.h>
#include <sys/sysctl.h>
#include <sys/uio.h>
#include <sys/wait.h>
#include <net/if.h>
#include <net/route.h>
#include <netinet/in.h>
#include <netinet/if_ether.h>
#include <netinet6/in6_var.h>
#include <netinet/icmp6.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <event.h>
#include <imsg.h>
#include <netdb.h>
#include <pwd.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <signal.h>
#include <unistd.h>
#include "log.h"
#include "slaacd.h"
#include "frontend.h"
#include "engine.h"
#include "control.h"
enum slaacd_process {
PROC_MAIN,
PROC_ENGINE,
PROC_FRONTEND
};
__dead void usage(void);
__dead void main_shutdown(void);
void main_sig_handler(int, short, void *);
static pid_t start_child(enum slaacd_process, char *, int, int, int);
void main_dispatch_frontend(int, short, void *);
void main_dispatch_engine(int, short, void *);
void open_icmp6sock(int);
void configure_interface(struct imsg_configure_address *);
void delete_address(struct imsg_configure_address *);
void configure_gateway(struct imsg_configure_dfr *, uint8_t);
void add_gateway(struct imsg_configure_dfr *);
void delete_gateway(struct imsg_configure_dfr *);
void send_rdns_proposal(struct imsg_propose_rdns *);
void read_soiikey(void);
int parse_hex_char(char);
ssize_t parse_hex_string(unsigned char *, size_t, const char *);
static int main_imsg_send_ipc_sockets(struct imsgbuf *, struct imsgbuf *);
int main_imsg_compose_frontend(int, int, void *, uint16_t);
int main_imsg_compose_engine(int, pid_t, void *, uint16_t);
static struct imsgev *iev_frontend;
static struct imsgev *iev_engine;
pid_t frontend_pid;
pid_t engine_pid;
int routesock, ioctl_sock, rtm_seq = 0;
uint8_t soiikey[SLAACD_SOIIKEY_LEN];
void
main_sig_handler(int sig, short event, void *arg)
{
switch (sig) {
case SIGTERM:
case SIGINT:
main_shutdown();
default:
fatalx("unexpected signal");
}
}
__dead void
usage(void)
{
extern char *__progname;
fprintf(stderr, "usage: %s [-dv] [-s socket]\n",
__progname);
exit(1);
}
int
main(int argc, char *argv[])
{
struct event ev_sigint, ev_sigterm;
int ch;
int debug = 0, engine_flag = 0, frontend_flag = 0;
int verbose = 0;
char *saved_argv0;
int pipe_main2frontend[2];
int pipe_main2engine[2];
int frontend_routesock, rtfilter, lockfd;
int rtable_any = RTABLE_ANY;
char *csock = _PATH_SLAACD_SOCKET;
struct imsg_propose_rdns rdns;
#ifndef SMALL
int control_fd;
#endif
log_init(1, LOG_DAEMON);
log_setverbose(1);
saved_argv0 = argv[0];
if (saved_argv0 == NULL)
saved_argv0 = "slaacd";
while ((ch = getopt(argc, argv, "dEFs:v")) != -1) {
switch (ch) {
case 'd':
debug = 1;
break;
case 'E':
engine_flag = 1;
break;
case 'F':
frontend_flag = 1;
break;
case 's':
csock = optarg;
break;
case 'v':
verbose++;
break;
default:
usage();
}
}
argc -= optind;
argv += optind;
if (argc > 0 || (engine_flag && frontend_flag))
usage();
if (engine_flag)
engine(debug, verbose);
else if (frontend_flag)
frontend(debug, verbose);
if (geteuid())
errx(1, "need root privileges");
lockfd = open(_PATH_LOCKFILE, O_CREAT|O_RDWR|O_EXLOCK|O_NONBLOCK, 0600);
if (lockfd == -1) {
if (errno == EAGAIN)
errx(1, "already running");
err(1, "%s", _PATH_LOCKFILE);
}
if (getpwnam(SLAACD_USER) == NULL)
errx(1, "unknown user %s", SLAACD_USER);
log_init(debug, LOG_DAEMON);
log_setverbose(verbose);
if (!debug)
daemon(0, 0);
if (socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC | SOCK_NONBLOCK,
PF_UNSPEC, pipe_main2frontend) == -1)
fatal("main2frontend socketpair");
if (socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC | SOCK_NONBLOCK,
PF_UNSPEC, pipe_main2engine) == -1)
fatal("main2engine socketpair");
engine_pid = start_child(PROC_ENGINE, saved_argv0, pipe_main2engine[1],
debug, verbose);
frontend_pid = start_child(PROC_FRONTEND, saved_argv0,
pipe_main2frontend[1], debug, verbose);
log_procinit("main");
if ((routesock = socket(AF_ROUTE, SOCK_RAW | SOCK_CLOEXEC |
SOCK_NONBLOCK, AF_INET6)) == -1)
fatal("route socket");
shutdown(routesock, SHUT_RD);
event_init();
signal_set(&ev_sigint, SIGINT, main_sig_handler, NULL);
signal_set(&ev_sigterm, SIGTERM, main_sig_handler, NULL);
signal_add(&ev_sigint, NULL);
signal_add(&ev_sigterm, NULL);
signal(SIGPIPE, SIG_IGN);
signal(SIGHUP, SIG_IGN);
if ((iev_frontend = malloc(sizeof(struct imsgev))) == NULL ||
(iev_engine = malloc(sizeof(struct imsgev))) == NULL)
fatal(NULL);
if (imsgbuf_init(&iev_frontend->ibuf, pipe_main2frontend[0]) == -1)
fatal(NULL);
imsgbuf_allow_fdpass(&iev_frontend->ibuf);
iev_frontend->handler = main_dispatch_frontend;
if (imsgbuf_init(&iev_engine->ibuf, pipe_main2engine[0]) == -1)
fatal(NULL);
imsgbuf_allow_fdpass(&iev_engine->ibuf);
iev_engine->handler = main_dispatch_engine;
iev_frontend->events = EV_READ;
event_set(&iev_frontend->ev, iev_frontend->ibuf.fd,
iev_frontend->events, iev_frontend->handler, iev_frontend);
event_add(&iev_frontend->ev, NULL);
iev_engine->events = EV_READ;
event_set(&iev_engine->ev, iev_engine->ibuf.fd, iev_engine->events,
iev_engine->handler, iev_engine);
event_add(&iev_engine->ev, NULL);
if (main_imsg_send_ipc_sockets(&iev_frontend->ibuf, &iev_engine->ibuf))
fatal("could not establish imsg links");
if ((ioctl_sock = socket(AF_INET6, SOCK_DGRAM | SOCK_CLOEXEC, 0)) == -1)
fatal("socket");
if ((frontend_routesock = socket(AF_ROUTE, SOCK_RAW | SOCK_CLOEXEC,
AF_INET6)) == -1)
fatal("route socket");
rtfilter = ROUTE_FILTER(RTM_IFINFO) | ROUTE_FILTER(RTM_NEWADDR) |
ROUTE_FILTER(RTM_DELADDR) | ROUTE_FILTER(RTM_DELETE) |
ROUTE_FILTER(RTM_CHGADDRATTR) | ROUTE_FILTER(RTM_PROPOSAL) |
ROUTE_FILTER(RTM_IFANNOUNCE);
if (setsockopt(frontend_routesock, AF_ROUTE, ROUTE_MSGFILTER,
&rtfilter, sizeof(rtfilter)) == -1)
fatal("setsockopt(ROUTE_MSGFILTER)");
if (setsockopt(frontend_routesock, AF_ROUTE, ROUTE_TABLEFILTER,
&rtable_any, sizeof(rtable_any)) == -1)
fatal("setsockopt(ROUTE_TABLEFILTER)");
#ifndef SMALL
if ((control_fd = control_init(csock)) == -1)
warnx("control socket setup failed");
read_soiikey();
#endif
if (pledge("stdio inet sendfd wroute", NULL) == -1)
fatal("pledge");
main_imsg_compose_frontend(IMSG_ROUTESOCK, frontend_routesock, NULL, 0);
#ifndef SMALL
if (control_fd != -1)
main_imsg_compose_frontend(IMSG_CONTROLFD, control_fd, NULL, 0);
#endif
main_imsg_compose_frontend(IMSG_STARTUP, -1, NULL, 0);
memset(&rdns, 0, sizeof(rdns));
rdns.if_index = 0;
rdns.rdns_count = 0;
send_rdns_proposal(&rdns);
event_dispatch();
main_shutdown();
return (0);
}
__dead void
main_shutdown(void)
{
pid_t pid;
int status;
imsgbuf_clear(&iev_frontend->ibuf);
close(iev_frontend->ibuf.fd);
imsgbuf_clear(&iev_engine->ibuf);
close(iev_engine->ibuf.fd);
log_debug("waiting for children to terminate");
do {
pid = wait(&status);
if (pid == -1) {
if (errno != EINTR && errno != ECHILD)
fatal("wait");
} else if (WIFSIGNALED(status))
log_warnx("%s terminated; signal %d",
(pid == engine_pid) ? "engine" :
"frontend", WTERMSIG(status));
} while (pid != -1 || (pid == -1 && errno == EINTR));
free(iev_frontend);
free(iev_engine);
log_info("terminating");
exit(0);
}
static pid_t
start_child(enum slaacd_process p, char *argv0, int fd, int debug, int verbose)
{
char *argv[7];
int argc = 0;
pid_t pid;
switch (pid = fork()) {
case -1:
fatal("cannot fork");
case 0:
break;
default:
close(fd);
return (pid);
}
if (fd != 3) {
if (dup2(fd, 3) == -1)
fatal("cannot setup imsg fd");
} else if (fcntl(fd, F_SETFD, 0) == -1)
fatal("cannot setup imsg fd");
argv[argc++] = argv0;
switch (p) {
case PROC_MAIN:
fatalx("Can not start main process");
case PROC_ENGINE:
argv[argc++] = "-E";
break;
case PROC_FRONTEND:
argv[argc++] = "-F";
break;
}
if (debug)
argv[argc++] = "-d";
if (verbose)
argv[argc++] = "-v";
if (verbose > 1)
argv[argc++] = "-v";
argv[argc++] = NULL;
execvp(argv0, argv);
fatal("execvp");
}
void
main_dispatch_frontend(int fd, short event, void *bula)
{
struct imsgev *iev = bula;
struct imsgbuf *ibuf;
struct imsg imsg;
struct imsg_ifinfo imsg_ifinfo;
ssize_t n;
uint32_t type;
int shut = 0;
int rdomain;
#ifndef SMALL
int verbose;
#endif
ibuf = &iev->ibuf;
if (event & EV_READ) {
if ((n = imsgbuf_read(ibuf)) == -1)
fatal("imsgbuf_read error");
if (n == 0)
shut = 1;
}
if (event & EV_WRITE) {
if (imsgbuf_write(ibuf) == -1) {
if (errno == EPIPE)
shut = 1;
else
fatal("imsgbuf_write");
}
}
for (;;) {
if ((n = imsg_get(ibuf, &imsg)) == -1)
fatal("imsg_get");
if (n == 0)
break;
type = imsg_get_type(&imsg);
switch (type) {
case IMSG_OPEN_ICMP6SOCK:
if (imsg_get_data(&imsg, &rdomain,
sizeof(rdomain)) == -1)
fatalx("%s: invalid %s", __func__, i2s(type));
open_icmp6sock(rdomain);
break;
#ifndef SMALL
case IMSG_CTL_LOG_VERBOSE:
if (imsg_get_data(&imsg, &verbose,
sizeof(verbose)) == -1)
fatalx("%s: invalid %s", __func__, i2s(type));
log_setverbose(verbose);
break;
#endif
case IMSG_UPDATE_IF:
if (imsg_get_data(&imsg, &imsg_ifinfo,
sizeof(imsg_ifinfo)) == -1)
fatalx("%s: invalid %s", __func__, i2s(type));
memcpy(imsg_ifinfo.soiikey, soiikey,
SLAACD_SOIIKEY_LEN);
main_imsg_compose_engine(IMSG_UPDATE_IF, 0,
&imsg_ifinfo, sizeof(imsg_ifinfo));
break;
default:
log_debug("%s: error handling imsg %d", __func__, type);
break;
}
imsg_free(&imsg);
}
if (!shut)
imsg_event_add(iev);
else {
event_del(&iev->ev);
event_loopexit(NULL);
}
}
void
main_dispatch_engine(int fd, short event, void *bula)
{
struct imsgev *iev = bula;
struct imsgbuf *ibuf;
struct imsg imsg;
struct imsg_configure_address address;
struct imsg_configure_dfr dfr;
struct imsg_propose_rdns rdns;
ssize_t n;
uint32_t type;
int shut = 0;
ibuf = &iev->ibuf;
if (event & EV_READ) {
if ((n = imsgbuf_read(ibuf)) == -1)
fatal("imsgbuf_read error");
if (n == 0)
shut = 1;
}
if (event & EV_WRITE) {
if (imsgbuf_write(ibuf) == -1) {
if (errno == EPIPE)
shut = 1;
else
fatal("imsgbuf_write");
}
}
for (;;) {
if ((n = imsg_get(ibuf, &imsg)) == -1)
fatal("imsg_get");
if (n == 0)
break;
type = imsg_get_type(&imsg);
switch (type) {
case IMSG_CONFIGURE_ADDRESS:
if (imsg_get_data(&imsg, &address,
sizeof(address)) == -1)
fatalx("%s: invalid %s", __func__, i2s(type));
configure_interface(&address);
break;
case IMSG_WITHDRAW_ADDRESS:
if (imsg_get_data(&imsg, &address,
sizeof(address)) == -1)
fatalx("%s: invalid %s", __func__, i2s(type));
delete_address(&address);
break;
case IMSG_CONFIGURE_DFR:
if (imsg_get_data(&imsg, &dfr, sizeof(dfr)) == -1)
fatalx("%s: invalid %s", __func__, i2s(type));
add_gateway(&dfr);
break;
case IMSG_WITHDRAW_DFR:
if (imsg_get_data(&imsg, &dfr, sizeof(dfr)) == -1)
fatalx("%s: invalid %s", __func__, i2s(type));
delete_gateway(&dfr);
break;
case IMSG_PROPOSE_RDNS:
if (imsg_get_data(&imsg, &rdns, sizeof(rdns)) == -1)
fatalx("%s: invalid %s", __func__, i2s(type));
if ((2 + rdns.rdns_count * sizeof(struct in6_addr)) >
sizeof(struct sockaddr_rtdns))
fatalx("%s: rdns_count too big: %d", __func__,
rdns.rdns_count);
if (rdns.rdns_count > MAX_RDNS_COUNT)
fatalx("%s: rdns_count too big: %d", __func__,
rdns.rdns_count);
send_rdns_proposal(&rdns);
break;
default:
log_debug("%s: error handling imsg %d", __func__, type);
break;
}
imsg_free(&imsg);
}
if (!shut)
imsg_event_add(iev);
else {
event_del(&iev->ev);
event_loopexit(NULL);
}
}
int
main_imsg_compose_frontend(int type, int fd, void *data, uint16_t datalen)
{
if (iev_frontend)
return (imsg_compose_event(iev_frontend, type, 0, 0, fd, data,
datalen));
else
return (-1);
}
int
main_imsg_compose_engine(int type, pid_t pid, void *data, uint16_t datalen)
{
if (iev_engine)
return(imsg_compose_event(iev_engine, type, 0, pid, -1, data,
datalen));
else
return (-1);
}
void
imsg_event_add(struct imsgev *iev)
{
iev->events = EV_READ;
if (imsgbuf_queuelen(&iev->ibuf) > 0)
iev->events |= EV_WRITE;
event_del(&iev->ev);
event_set(&iev->ev, iev->ibuf.fd, iev->events, iev->handler, iev);
event_add(&iev->ev, NULL);
}
int
imsg_compose_event(struct imsgev *iev, uint16_t type, uint32_t peerid,
pid_t pid, int fd, void *data, uint16_t datalen)
{
int ret;
if ((ret = imsg_compose(&iev->ibuf, type, peerid, pid, fd, data,
datalen)) != -1)
imsg_event_add(iev);
return (ret);
}
int
imsg_forward_event(struct imsgev *iev, struct imsg *imsg)
{
int ret;
if ((ret = imsg_forward(&iev->ibuf, imsg)) != -1)
imsg_event_add(iev);
return (ret);
}
static int
main_imsg_send_ipc_sockets(struct imsgbuf *frontend_buf,
struct imsgbuf *engine_buf)
{
int pipe_frontend2engine[2];
if (socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC | SOCK_NONBLOCK,
PF_UNSPEC, pipe_frontend2engine) == -1)
return (-1);
if (imsg_compose(frontend_buf, IMSG_SOCKET_IPC, 0, 0,
pipe_frontend2engine[0], NULL, 0) == -1)
return (-1);
imsgbuf_flush(frontend_buf);
if (imsg_compose(engine_buf, IMSG_SOCKET_IPC, 0, 0,
pipe_frontend2engine[1], NULL, 0) == -1)
return (-1);
imsgbuf_flush(engine_buf);
return (0);
}
void
configure_interface(struct imsg_configure_address *address)
{
struct in6_aliasreq in6_addreq;
time_t t;
char *if_name;
memset(&in6_addreq, 0, sizeof(in6_addreq));
if_name = if_indextoname(address->if_index, in6_addreq.ifra_name);
if (if_name == NULL) {
log_warnx("%s: cannot find interface %d", __func__,
address->if_index);
return;
}
memcpy(&in6_addreq.ifra_addr, &address->addr,
sizeof(in6_addreq.ifra_addr));
memcpy(&in6_addreq.ifra_dstaddr, &address->gw,
sizeof(in6_addreq.ifra_dstaddr));
memcpy(&in6_addreq.ifra_prefixmask.sin6_addr, &address->mask,
sizeof(in6_addreq.ifra_prefixmask.sin6_addr));
in6_addreq.ifra_prefixmask.sin6_family = AF_INET6;
in6_addreq.ifra_prefixmask.sin6_len =
sizeof(in6_addreq.ifra_prefixmask);
t = time(NULL);
in6_addreq.ifra_lifetime.ia6t_expire = t + address->vltime;
in6_addreq.ifra_lifetime.ia6t_vltime = address->vltime;
in6_addreq.ifra_lifetime.ia6t_preferred = t + address->pltime;
in6_addreq.ifra_lifetime.ia6t_pltime = address->pltime;
in6_addreq.ifra_flags |= IN6_IFF_AUTOCONF;
if (address->temporary)
in6_addreq.ifra_flags |= IN6_IFF_TEMPORARY;
log_debug("%s: %s", __func__, if_name);
if (ioctl(ioctl_sock, SIOCAIFADDR_IN6, &in6_addreq) == -1)
log_warn("SIOCAIFADDR_IN6");
if (address->mtu) {
struct ifreq ifr;
strlcpy(ifr.ifr_name, in6_addreq.ifra_name,
sizeof(ifr.ifr_name));
ifr.ifr_mtu = address->mtu;
log_debug("Setting MTU to %d", ifr.ifr_mtu);
if (ioctl(ioctl_sock, SIOCSIFMTU, &ifr) == -1)
log_warn("failed to set MTU");
}
}
void
delete_address(struct imsg_configure_address *address)
{
struct in6_ifreq in6_ridreq;
char *if_name;
memset(&in6_ridreq, 0, sizeof(in6_ridreq));
if_name = if_indextoname(address->if_index, in6_ridreq.ifr_name);
if (if_name == NULL) {
log_warnx("%s: cannot find interface %d", __func__,
address->if_index);
return;
}
memcpy(&in6_ridreq.ifr_addr, &address->addr,
sizeof(in6_ridreq.ifr_addr));
log_debug("%s: %s", __func__, if_name);
if (ioctl(ioctl_sock, SIOCDIFADDR_IN6, &in6_ridreq) == -1 &&
errno != EADDRNOTAVAIL)
log_warn("%s: cannot remove address", __func__);
}
#define ROUNDUP(a) \
(((a) & (sizeof(long) - 1)) ? (1 + ((a) | (sizeof(long) - 1))) : (a))
void
configure_gateway(struct imsg_configure_dfr *dfr, uint8_t rtm_type)
{
struct rt_msghdr rtm;
struct sockaddr_rtlabel rl;
struct sockaddr_in6 dst, gw, mask;
struct iovec iov[10];
long pad = 0;
int iovcnt = 0, padlen;
memset(&rtm, 0, sizeof(rtm));
rtm.rtm_version = RTM_VERSION;
rtm.rtm_type = rtm_type;
rtm.rtm_msglen = sizeof(rtm);
rtm.rtm_tableid = dfr->rdomain;
rtm.rtm_index = dfr->if_index;
rtm.rtm_seq = ++rtm_seq;
rtm.rtm_priority = RTP_NONE;
rtm.rtm_addrs = RTA_DST | RTA_GATEWAY | RTA_NETMASK | RTA_LABEL;
rtm.rtm_flags = RTF_UP | RTF_GATEWAY | RTF_STATIC | RTF_MPATH;
iov[iovcnt].iov_base = &rtm;
iov[iovcnt++].iov_len = sizeof(rtm);
memset(&dst, 0, sizeof(mask));
dst.sin6_family = AF_INET6;
dst.sin6_len = sizeof(struct sockaddr_in6);
iov[iovcnt].iov_base = &dst;
iov[iovcnt++].iov_len = sizeof(dst);
rtm.rtm_msglen += sizeof(dst);
padlen = ROUNDUP(sizeof(dst)) - sizeof(dst);
if (padlen > 0) {
iov[iovcnt].iov_base = &pad;
iov[iovcnt++].iov_len = padlen;
rtm.rtm_msglen += padlen;
}
memcpy(&gw, &dfr->addr, sizeof(gw));
#ifdef __KAME__
*(u_int16_t *)& gw.sin6_addr.s6_addr[2] = htons(gw.sin6_scope_id);
gw.sin6_scope_id = 0;
#endif
iov[iovcnt].iov_base = &gw;
iov[iovcnt++].iov_len = sizeof(gw);
rtm.rtm_msglen += sizeof(gw);
padlen = ROUNDUP(sizeof(gw)) - sizeof(gw);
if (padlen > 0) {
iov[iovcnt].iov_base = &pad;
iov[iovcnt++].iov_len = padlen;
rtm.rtm_msglen += padlen;
}
memset(&mask, 0, sizeof(mask));
mask.sin6_family = AF_INET6;
mask.sin6_len = sizeof(struct sockaddr_in6);
iov[iovcnt].iov_base = &mask;
iov[iovcnt++].iov_len = sizeof(mask);
rtm.rtm_msglen += sizeof(mask);
padlen = ROUNDUP(sizeof(mask)) - sizeof(mask);
if (padlen > 0) {
iov[iovcnt].iov_base = &pad;
iov[iovcnt++].iov_len = padlen;
rtm.rtm_msglen += padlen;
}
memset(&rl, 0, sizeof(rl));
rl.sr_len = sizeof(rl);
rl.sr_family = AF_UNSPEC;
(void)snprintf(rl.sr_label, sizeof(rl.sr_label), "%s",
SLAACD_RTA_LABEL);
iov[iovcnt].iov_base = &rl;
iov[iovcnt++].iov_len = sizeof(rl);
rtm.rtm_msglen += sizeof(rl);
padlen = ROUNDUP(sizeof(rl)) - sizeof(rl);
if (padlen > 0) {
iov[iovcnt].iov_base = &pad;
iov[iovcnt++].iov_len = padlen;
rtm.rtm_msglen += padlen;
}
if (writev(routesock, iov, iovcnt) == -1) {
if (errno != EEXIST)
log_warn("failed to send route message");
}
}
void
add_gateway(struct imsg_configure_dfr *dfr)
{
configure_gateway(dfr, RTM_ADD);
}
void
delete_gateway(struct imsg_configure_dfr *dfr)
{
configure_gateway(dfr, RTM_DELETE);
}
void
send_rdns_proposal(struct imsg_propose_rdns *rdns)
{
struct rt_msghdr rtm;
struct sockaddr_rtdns rtdns;
struct iovec iov[3];
long pad = 0;
int iovcnt = 0, padlen;
memset(&rtm, 0, sizeof(rtm));
rtm.rtm_version = RTM_VERSION;
rtm.rtm_type = RTM_PROPOSAL;
rtm.rtm_msglen = sizeof(rtm);
rtm.rtm_tableid = rdns->rdomain;
rtm.rtm_index = rdns->if_index;
rtm.rtm_seq = ++rtm_seq;
rtm.rtm_priority = RTP_PROPOSAL_SLAAC;
rtm.rtm_addrs = RTA_DNS;
rtm.rtm_flags = RTF_UP;
iov[iovcnt].iov_base = &rtm;
iov[iovcnt++].iov_len = sizeof(rtm);
memset(&rtdns, 0, sizeof(rtdns));
rtdns.sr_family = AF_INET6;
rtdns.sr_len = 2 + rdns->rdns_count * sizeof(struct in6_addr);
memcpy(rtdns.sr_dns, rdns->rdns, sizeof(rtdns.sr_dns));
iov[iovcnt].iov_base = &rtdns;
iov[iovcnt++].iov_len = sizeof(rtdns);
rtm.rtm_msglen += sizeof(rtdns);
padlen = ROUNDUP(sizeof(rtdns)) - sizeof(rtdns);
if (padlen > 0) {
iov[iovcnt].iov_base = &pad;
iov[iovcnt++].iov_len = padlen;
rtm.rtm_msglen += padlen;
}
if (writev(routesock, iov, iovcnt) == -1)
log_warn("failed to send route message");
}
#ifndef SMALL
const char*
sin6_to_str(struct sockaddr_in6 *sin6)
{
static char hbuf[NI_MAXHOST];
int error;
error = getnameinfo((struct sockaddr *)sin6, sin6->sin6_len, hbuf,
sizeof(hbuf), NULL, 0, NI_NUMERICHOST | NI_NUMERICSERV);
if (error) {
log_warnx("%s", gai_strerror(error));
strlcpy(hbuf, "unknown", sizeof(hbuf));
}
return hbuf;
}
int
parse_hex_char(char ch)
{
if (ch >= '0' && ch <= '9')
return (ch - '0');
ch = tolower((unsigned char)ch);
if (ch >= 'a' && ch <= 'f')
return (ch - 'a' + 10);
return (-1);
}
ssize_t
parse_hex_string(unsigned char *dst, size_t dstlen, const char *src)
{
size_t len = 0;
int digit;
memset(dst, 0, dstlen);
while (len < dstlen) {
if (*src == '\0')
return (len);
digit = parse_hex_char(*src++);
if (digit == -1)
return (-1);
dst[len] = digit << 4;
digit = parse_hex_char(*src++);
if (digit == -1)
return (-1);
dst[len] |= digit;
len++;
}
while (*src != '\0') {
if (parse_hex_char(*src++) == -1 ||
parse_hex_char(*src++) == -1)
return (-1);
len++;
}
return (len);
}
void
read_soiikey(void)
{
int fd = -1;
char buf[33];
if ((fd = open("/etc/soii.key", O_RDONLY)) == -1)
goto err;
memset(buf, 0, sizeof(buf));
if (read(fd, buf, sizeof(buf) - 1) == -1)
goto err;
close(fd);
fd = -1;
if (parse_hex_string(soiikey, sizeof(soiikey), buf) == -1)
goto err;
return;
err:
memset(soiikey, 0, sizeof(soiikey));
if (fd != -1)
close(fd);
}
#endif
void
open_icmp6sock(int rdomain)
{
int icmp6sock, on = 1;
log_debug("%s: %d", __func__, rdomain);
if ((icmp6sock = socket(AF_INET6, SOCK_RAW | SOCK_CLOEXEC,
IPPROTO_ICMPV6)) == -1)
fatal("ICMPv6 socket");
if (setsockopt(icmp6sock, IPPROTO_IPV6, IPV6_RECVPKTINFO, &on,
sizeof(on)) == -1)
fatal("IPV6_RECVPKTINFO");
if (setsockopt(icmp6sock, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, &on,
sizeof(on)) == -1)
fatal("IPV6_RECVHOPLIMIT");
if (setsockopt(icmp6sock, SOL_SOCKET, SO_RTABLE, &rdomain,
sizeof(rdomain)) == -1) {
log_warn("setsockopt SO_RTABLE");
close(icmp6sock);
return;
}
main_imsg_compose_frontend(IMSG_ICMP6SOCK, icmp6sock, &rdomain,
sizeof(rdomain));
}
#ifndef SMALL
#define I2S(x) case x: return #x
const char*
i2s(uint32_t type)
{
static char unknown[sizeof("IMSG_4294967295")];
switch (type) {
I2S(IMSG_NONE);
I2S(IMSG_CTL_LOG_VERBOSE);
I2S(IMSG_CTL_SHOW_INTERFACE_INFO);
I2S(IMSG_CTL_SHOW_INTERFACE_INFO_RA);
I2S(IMSG_CTL_SHOW_INTERFACE_INFO_RA_PREFIX);
I2S(IMSG_CTL_SHOW_INTERFACE_INFO_RA_RDNS);
I2S(IMSG_CTL_SHOW_INTERFACE_INFO_ADDR_PROPOSALS);
I2S(IMSG_CTL_SHOW_INTERFACE_INFO_ADDR_PROPOSAL);
I2S(IMSG_CTL_SHOW_INTERFACE_INFO_DFR_PROPOSALS);
I2S(IMSG_CTL_SHOW_INTERFACE_INFO_DFR_PROPOSAL);
I2S(IMSG_CTL_SHOW_INTERFACE_INFO_RDNS_PROPOSALS);
I2S(IMSG_CTL_SHOW_INTERFACE_INFO_RDNS_PROPOSAL);
I2S(IMSG_CTL_END);
I2S(IMSG_PROPOSE_RDNS);
I2S(IMSG_REPROPOSE_RDNS);
I2S(IMSG_CTL_SEND_SOLICITATION);
I2S(IMSG_SOCKET_IPC);
I2S(IMSG_OPEN_ICMP6SOCK);
I2S(IMSG_ICMP6SOCK);
I2S(IMSG_ROUTESOCK);
I2S(IMSG_CONTROLFD);
I2S(IMSG_STARTUP);
I2S(IMSG_UPDATE_IF);
I2S(IMSG_REMOVE_IF);
I2S(IMSG_RA);
I2S(IMSG_CONFIGURE_ADDRESS);
I2S(IMSG_WITHDRAW_ADDRESS);
I2S(IMSG_DEL_ADDRESS);
I2S(IMSG_DEL_ROUTE);
I2S(IMSG_CONFIGURE_DFR);
I2S(IMSG_WITHDRAW_DFR);
I2S(IMSG_DUP_ADDRESS);
default:
snprintf(unknown, sizeof(unknown), "IMSG_%u", type);
return unknown;
}
}
#undef I2S
#endif
