#include <sys/types.h>
#include <sys/queue.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/syslog.h>
#include <sys/wait.h>
#include <net/if.h>
#include <net/route.h>
#include <err.h>
#include <errno.h>
#include <event.h>
#include <fcntl.h>
#include <imsg.h>
#include <netdb.h>
#include <asr.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <signal.h>
#include <unistd.h>
#include "log.h"
#include "unwind.h"
#include "frontend.h"
#include "resolver.h"
#include "control.h"
#define TRUST_ANCHOR_FILE "/var/db/unwind.key"
enum uw_process {
PROC_MAIN,
PROC_RESOLVER,
PROC_FRONTEND,
};
__dead void usage(void);
__dead void main_shutdown(void);
void main_sig_handler(int, short, void *);
static pid_t start_child(enum uw_process, char *, int, int, int);
void main_dispatch_frontend(int, short, void *);
void main_dispatch_resolver(int, short, void *);
static int main_imsg_send_ipc_sockets(struct imsgbuf *, struct imsgbuf *);
static int main_imsg_send_config(struct uw_conf *);
int main_reload(void);
int main_sendall(enum imsg_type, void *, uint16_t);
void open_ports(void);
void solicit_dns_proposals(void);
void send_blocklist_fd(void);
struct uw_conf *main_conf;
static struct imsgev *iev_frontend;
static struct imsgev *iev_resolver;
char *conffile;
pid_t frontend_pid;
pid_t resolver_pid;
uint32_t cmd_opts;
int routesock;
void
main_sig_handler(int sig, short event, void *arg)
{
switch (sig) {
case SIGTERM:
case SIGINT:
main_shutdown();
break;
case SIGHUP:
if (main_reload() == -1)
log_warnx("configuration reload failed");
else
log_debug("configuration reloaded");
break;
default:
fatalx("unexpected signal");
}
}
__dead void
usage(void)
{
extern char *__progname;
fprintf(stderr, "usage: %s [-dnv] [-f file] [-s socket]\n",
__progname);
exit(1);
}
int
main(int argc, char *argv[])
{
struct event ev_sigint, ev_sigterm, ev_sighup;
int ch, debug = 0, resolver_flag = 0, frontend_flag = 0;
int frontend_routesock, rtfilter;
int pipe_main2frontend[2], pipe_main2resolver[2];
int control_fd, ta_fd;
char *csock, *saved_argv0;
csock = _PATH_UNWIND_SOCKET;
log_init(1, LOG_DAEMON);
log_setverbose(1);
saved_argv0 = argv[0];
if (saved_argv0 == NULL)
saved_argv0 = "unwind";
while ((ch = getopt(argc, argv, "dEFf:ns:v")) != -1) {
switch (ch) {
case 'd':
debug = 1;
break;
case 'E':
resolver_flag = 1;
break;
case 'F':
frontend_flag = 1;
break;
case 'f':
conffile = optarg;
break;
case 'n':
cmd_opts |= OPT_NOACTION;
break;
case 's':
csock = optarg;
break;
case 'v':
if (cmd_opts & OPT_VERBOSE2)
cmd_opts |= OPT_VERBOSE3;
if (cmd_opts & OPT_VERBOSE)
cmd_opts |= OPT_VERBOSE2;
cmd_opts |= OPT_VERBOSE;
break;
default:
usage();
}
}
argc -= optind;
argv += optind;
if (argc > 0 || (resolver_flag && frontend_flag))
usage();
if (resolver_flag)
resolver(debug, cmd_opts & (OPT_VERBOSE | OPT_VERBOSE2 |
OPT_VERBOSE3));
else if (frontend_flag)
frontend(debug, cmd_opts & (OPT_VERBOSE | OPT_VERBOSE2 |
OPT_VERBOSE3));
if ((main_conf = parse_config(conffile)) == NULL)
exit(1);
if (cmd_opts & OPT_NOACTION) {
if (cmd_opts & OPT_VERBOSE)
print_config(main_conf);
else
fprintf(stderr, "configuration OK\n");
exit(0);
}
if (geteuid())
errx(1, "need root privileges");
if (getpwnam(UNWIND_USER) == NULL)
errx(1, "unknown user %s", UNWIND_USER);
log_init(debug, LOG_DAEMON);
log_setverbose(cmd_opts & (OPT_VERBOSE | OPT_VERBOSE2 | OPT_VERBOSE3));
if (!debug)
daemon(1, 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_main2resolver) == -1)
fatal("main2resolver socketpair");
resolver_pid = start_child(PROC_RESOLVER, saved_argv0,
pipe_main2resolver[1], debug, cmd_opts & (OPT_VERBOSE |
OPT_VERBOSE2 | OPT_VERBOSE3));
frontend_pid = start_child(PROC_FRONTEND, saved_argv0,
pipe_main2frontend[1], debug, cmd_opts & (OPT_VERBOSE |
OPT_VERBOSE2 | OPT_VERBOSE3));
log_procinit("main");
event_init();
signal_set(&ev_sigint, SIGINT, main_sig_handler, NULL);
signal_set(&ev_sigterm, SIGTERM, main_sig_handler, NULL);
signal_set(&ev_sighup, SIGHUP, main_sig_handler, NULL);
signal_add(&ev_sigint, NULL);
signal_add(&ev_sigterm, NULL);
signal_add(&ev_sighup, NULL);
signal(SIGPIPE, SIG_IGN);
if ((iev_frontend = malloc(sizeof(struct imsgev))) == NULL ||
(iev_resolver = 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_resolver->ibuf, pipe_main2resolver[0]) == -1)
fatal(NULL);
imsgbuf_allow_fdpass(&iev_resolver->ibuf);
iev_resolver->handler = main_dispatch_resolver;
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_resolver->events = EV_READ;
event_set(&iev_resolver->ev, iev_resolver->ibuf.fd,
iev_resolver->events, iev_resolver->handler, iev_resolver);
event_add(&iev_resolver->ev, NULL);
if (main_imsg_send_ipc_sockets(&iev_frontend->ibuf,
&iev_resolver->ibuf))
fatal("could not establish imsg links");
open_ports();
if ((control_fd = control_init(csock)) == -1)
fatalx("control socket setup failed");
if ((frontend_routesock = socket(AF_ROUTE, SOCK_RAW | SOCK_CLOEXEC |
SOCK_NONBLOCK, 0)) == -1)
fatal("route socket");
rtfilter = ROUTE_FILTER(RTM_IFINFO) | ROUTE_FILTER(RTM_PROPOSAL)
| ROUTE_FILTER(RTM_IFANNOUNCE) | ROUTE_FILTER(RTM_NEWADDR)
| ROUTE_FILTER(RTM_DELADDR);
if (setsockopt(frontend_routesock, AF_ROUTE, ROUTE_MSGFILTER,
&rtfilter, sizeof(rtfilter)) == -1)
fatal("setsockopt(ROUTE_MSGFILTER)");
if ((routesock = socket(AF_ROUTE, SOCK_RAW | SOCK_CLOEXEC |
SOCK_NONBLOCK, 0)) == -1)
fatal("route socket");
shutdown(routesock, SHUT_RD);
if ((ta_fd = open(TRUST_ANCHOR_FILE, O_RDWR | O_CREAT, 0644)) == -1)
log_warn("%s", TRUST_ANCHOR_FILE);
main_imsg_compose_frontend_fd(IMSG_TAFD, 0, ta_fd);
main_imsg_compose_frontend_fd(IMSG_CONTROLFD, 0, control_fd);
main_imsg_compose_frontend_fd(IMSG_ROUTESOCK, 0, frontend_routesock);
main_imsg_send_config(main_conf);
if (main_conf->blocklist_file != NULL)
send_blocklist_fd();
if (pledge("stdio rpath sendfd", NULL) == -1)
fatal("pledge");
main_imsg_compose_frontend(IMSG_STARTUP, 0, NULL, 0);
main_imsg_compose_resolver(IMSG_STARTUP, 0, NULL, 0);
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_resolver->ibuf);
close(iev_resolver->ibuf.fd);
config_clear(main_conf);
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 == resolver_pid) ? "resolver" :
"frontend", WTERMSIG(status));
} while (pid != -1 || (pid == -1 && errno == EINTR));
free(iev_frontend);
free(iev_resolver);
log_info("terminating");
exit(0);
}
static pid_t
start_child(enum uw_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_RESOLVER:
argv[argc++] = "-E";
break;
case PROC_FRONTEND:
argv[argc++] = "-F";
break;
}
if (debug)
argv[argc++] = "-d";
if (verbose & OPT_VERBOSE)
argv[argc++] = "-v";
if (verbose & OPT_VERBOSE2)
argv[argc++] = "-v";
if (verbose & OPT_VERBOSE3)
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;
ssize_t n;
int shut = 0, verbose;
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 = imsgbuf_get(ibuf, &imsg)) == -1)
fatal("imsgbuf_get");
if (n == 0)
break;
switch (imsg.hdr.type) {
case IMSG_STARTUP_DONE:
solicit_dns_proposals();
break;
case IMSG_CTL_RELOAD:
if (main_reload() == -1)
log_warnx("configuration reload failed");
else
log_warnx("configuration reloaded");
break;
case IMSG_CTL_LOG_VERBOSE:
if (IMSG_DATA_SIZE(imsg) != sizeof(verbose))
fatalx("%s: IMSG_CTL_LOG_VERBOSE wrong length: "
"%lu", __func__, IMSG_DATA_SIZE(imsg));
memcpy(&verbose, imsg.data, sizeof(verbose));
log_setverbose(verbose);
break;
default:
log_debug("%s: error handling imsg %d", __func__,
imsg.hdr.type);
break;
}
imsg_free(&imsg);
}
if (!shut)
imsg_event_add(iev);
else {
event_del(&iev->ev);
event_loopexit(NULL);
}
}
void
main_dispatch_resolver(int fd, short event, void *bula)
{
struct imsgev *iev = bula;
struct imsgbuf *ibuf;
struct imsg imsg;
ssize_t n;
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 = imsgbuf_get(ibuf, &imsg)) == -1)
fatal("imsgbuf_get");
if (n == 0)
break;
switch (imsg.hdr.type) {
default:
log_debug("%s: error handling imsg %d", __func__,
imsg.hdr.type);
break;
}
imsg_free(&imsg);
}
if (!shut)
imsg_event_add(iev);
else {
event_del(&iev->ev);
event_loopexit(NULL);
}
}
void
main_imsg_compose_frontend(int type, pid_t pid, void *data, uint16_t datalen)
{
if (iev_frontend)
imsg_compose_event(iev_frontend, type, 0, pid, -1, data,
datalen);
}
void
main_imsg_compose_frontend_fd(int type, pid_t pid, int fd)
{
if (iev_frontend)
imsg_compose_event(iev_frontend, type, 0, pid, fd, NULL, 0);
}
void
main_imsg_compose_resolver(int type, pid_t pid, void *data, uint16_t datalen)
{
if (iev_resolver)
imsg_compose_event(iev_resolver, type, 0, pid, -1, data,
datalen);
}
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);
}
static int
main_imsg_send_ipc_sockets(struct imsgbuf *frontend_buf,
struct imsgbuf *resolver_buf)
{
int pipe_frontend2resolver[2];
if (socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC | SOCK_NONBLOCK,
PF_UNSPEC, pipe_frontend2resolver) == -1)
return (-1);
if (imsg_compose(frontend_buf, IMSG_SOCKET_IPC_RESOLVER, 0, 0,
pipe_frontend2resolver[0], NULL, 0) == -1)
return (-1);
if (imsg_compose(resolver_buf, IMSG_SOCKET_IPC_FRONTEND, 0, 0,
pipe_frontend2resolver[1], NULL, 0) == -1)
return (-1);
return (0);
}
int
main_reload(void)
{
struct uw_conf *xconf;
if ((xconf = parse_config(conffile)) == NULL)
return (-1);
if (main_imsg_send_config(xconf) == -1)
return (-1);
merge_config(main_conf, xconf);
if (main_conf->blocklist_file != NULL)
send_blocklist_fd();
return (0);
}
int
main_imsg_send_config(struct uw_conf *xconf)
{
struct uw_forwarder *uw_forwarder;
struct force_tree_entry *force_entry;
if (main_sendall(IMSG_RECONF_CONF, xconf, sizeof(*xconf)) == -1)
return (-1);
if (xconf->blocklist_file != NULL) {
if (main_sendall(IMSG_RECONF_BLOCKLIST_FILE,
xconf->blocklist_file, strlen(xconf->blocklist_file) + 1)
== -1)
return (-1);
}
TAILQ_FOREACH(uw_forwarder, &xconf->uw_forwarder_list, entry) {
if (main_sendall(IMSG_RECONF_FORWARDER, uw_forwarder,
sizeof(*uw_forwarder)) == -1)
return (-1);
}
TAILQ_FOREACH(uw_forwarder, &xconf->uw_dot_forwarder_list,
entry) {
if (main_sendall(IMSG_RECONF_DOT_FORWARDER, uw_forwarder,
sizeof(*uw_forwarder)) == -1)
return (-1);
}
RB_FOREACH(force_entry, force_tree, &xconf->force) {
if (main_sendall(IMSG_RECONF_FORCE, force_entry,
sizeof(*force_entry)) == -1)
return (-1);
}
if (main_sendall(IMSG_RECONF_END, NULL, 0) == -1)
return (-1);
return (0);
}
int
main_sendall(enum imsg_type type, void *buf, uint16_t len)
{
if (imsg_compose_event(iev_frontend, type, 0, 0, -1, buf, len) == -1)
return (-1);
if (imsg_compose_event(iev_resolver, type, 0, 0, -1, buf, len) == -1)
return (-1);
return (0);
}
void
merge_config(struct uw_conf *conf, struct uw_conf *xconf)
{
struct uw_forwarder *uw_forwarder;
struct force_tree_entry *n, *nxt;
while ((uw_forwarder = TAILQ_FIRST(&conf->uw_forwarder_list)) !=
NULL) {
TAILQ_REMOVE(&conf->uw_forwarder_list, uw_forwarder, entry);
free(uw_forwarder);
}
while ((uw_forwarder = TAILQ_FIRST(&conf->uw_dot_forwarder_list)) !=
NULL) {
TAILQ_REMOVE(&conf->uw_dot_forwarder_list, uw_forwarder, entry);
free(uw_forwarder);
}
RB_FOREACH_SAFE(n, force_tree, &conf->force, nxt) {
RB_REMOVE(force_tree, &conf->force, n);
free(n);
}
memcpy(&conf->enabled_resolvers, &xconf->enabled_resolvers,
sizeof(conf->enabled_resolvers));
memcpy(&conf->force_resolvers, &xconf->force_resolvers,
sizeof(conf->force_resolvers));
memcpy(&conf->res_pref, &xconf->res_pref,
sizeof(conf->res_pref));
free(conf->blocklist_file);
conf->blocklist_file = xconf->blocklist_file;
conf->blocklist_log = xconf->blocklist_log;
TAILQ_CONCAT(&conf->uw_forwarder_list, &xconf->uw_forwarder_list,
entry);
TAILQ_CONCAT(&conf->uw_dot_forwarder_list,
&xconf->uw_dot_forwarder_list, entry);
RB_FOREACH_SAFE(n, force_tree, &xconf->force, nxt) {
RB_REMOVE(force_tree, &xconf->force, n);
RB_INSERT(force_tree, &conf->force, n);
}
free(xconf);
}
struct uw_conf *
config_new_empty(void)
{
struct uw_conf *xconf;
xconf = calloc(1, sizeof(*xconf));
if (xconf == NULL)
fatal(NULL);
TAILQ_INIT(&xconf->uw_forwarder_list);
TAILQ_INIT(&xconf->uw_dot_forwarder_list);
RB_INIT(&xconf->force);
return (xconf);
}
void
config_clear(struct uw_conf *conf)
{
struct uw_conf *xconf;
xconf = config_new_empty();
merge_config(conf, xconf);
free(conf);
}
void
open_ports(void)
{
struct addrinfo hints, *res0;
int udp4sock = -1, udp6sock = -1, error, bsize = 65535;
int tcp4sock = -1, tcp6sock = -1;
int opt = 1;
memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_INET;
hints.ai_socktype = SOCK_DGRAM;
hints.ai_flags = AI_NUMERICHOST | AI_PASSIVE;
error = getaddrinfo("127.0.0.1", "domain", &hints, &res0);
if (!error && res0) {
if ((udp4sock = socket(res0->ai_family, res0->ai_socktype,
res0->ai_protocol)) != -1) {
if (setsockopt(udp4sock, SOL_SOCKET, SO_REUSEADDR,
&opt, sizeof(opt)) == -1)
log_warn("setting SO_REUSEADDR on socket");
if (setsockopt(udp4sock, SOL_SOCKET, SO_SNDBUF, &bsize,
sizeof(bsize)) == -1)
log_warn("setting SO_SNDBUF on socket");
if (bind(udp4sock, res0->ai_addr, res0->ai_addrlen)
== -1) {
close(udp4sock);
udp4sock = -1;
}
}
}
if (res0)
freeaddrinfo(res0);
hints.ai_family = AF_INET6;
error = getaddrinfo("::1", "domain", &hints, &res0);
if (!error && res0) {
if ((udp6sock = socket(res0->ai_family, res0->ai_socktype,
res0->ai_protocol)) != -1) {
if (setsockopt(udp6sock, SOL_SOCKET, SO_REUSEADDR,
&opt, sizeof(opt)) == -1)
log_warn("setting SO_REUSEADDR on socket");
if (setsockopt(udp6sock, SOL_SOCKET, SO_SNDBUF, &bsize,
sizeof(bsize)) == -1)
log_warn("setting SO_SNDBUF on socket");
if (bind(udp6sock, res0->ai_addr, res0->ai_addrlen)
== -1) {
close(udp6sock);
udp6sock = -1;
}
}
}
if (res0)
freeaddrinfo(res0);
hints.ai_family = AF_INET;
hints.ai_socktype = SOCK_STREAM;
error = getaddrinfo("127.0.0.1", "domain", &hints, &res0);
if (!error && res0) {
if ((tcp4sock = socket(res0->ai_family,
res0->ai_socktype | SOCK_NONBLOCK,
res0->ai_protocol)) != -1) {
if (setsockopt(tcp4sock, SOL_SOCKET, SO_REUSEADDR,
&opt, sizeof(opt)) == -1)
log_warn("setting SO_REUSEADDR on socket");
if (setsockopt(tcp4sock, SOL_SOCKET, SO_SNDBUF, &bsize,
sizeof(bsize)) == -1)
log_warn("setting SO_SNDBUF on socket");
if (bind(tcp4sock, res0->ai_addr, res0->ai_addrlen)
== -1) {
close(tcp4sock);
tcp4sock = -1;
}
if (listen(tcp4sock, 5) == -1) {
close(tcp4sock);
tcp4sock = -1;
}
}
}
if (res0)
freeaddrinfo(res0);
hints.ai_family = AF_INET6;
error = getaddrinfo("::1", "domain", &hints, &res0);
if (!error && res0) {
if ((tcp6sock = socket(res0->ai_family,
res0->ai_socktype | SOCK_NONBLOCK,
res0->ai_protocol)) != -1) {
if (setsockopt(tcp6sock, SOL_SOCKET, SO_REUSEADDR,
&opt, sizeof(opt)) == -1)
log_warn("setting SO_REUSEADDR on socket");
if (setsockopt(tcp6sock, SOL_SOCKET, SO_SNDBUF, &bsize,
sizeof(bsize)) == -1)
log_warn("setting SO_SNDBUF on socket");
if (bind(tcp6sock, res0->ai_addr, res0->ai_addrlen)
== -1) {
close(tcp6sock);
tcp6sock = -1;
}
if (listen(tcp6sock, 5) == -1) {
close(tcp6sock);
tcp6sock = -1;
}
}
}
if (res0)
freeaddrinfo(res0);
if ((udp4sock == -1 || tcp4sock == -1) && (udp6sock == -1 ||
tcp6sock == -1))
fatalx("could not bind to 127.0.0.1 or ::1 on port 53");
if (udp4sock != -1)
main_imsg_compose_frontend_fd(IMSG_UDP4SOCK, 0, udp4sock);
if (udp6sock != -1)
main_imsg_compose_frontend_fd(IMSG_UDP6SOCK, 0, udp6sock);
if (tcp4sock != -1)
main_imsg_compose_frontend_fd(IMSG_TCP4SOCK, 0, tcp4sock);
if (tcp6sock != -1)
main_imsg_compose_frontend_fd(IMSG_TCP6SOCK, 0, tcp6sock);
}
void
solicit_dns_proposals(void)
{
struct rt_msghdr rtm;
struct iovec iov[1];
int iovcnt = 0;
memset(&rtm, 0, sizeof(rtm));
rtm.rtm_version = RTM_VERSION;
rtm.rtm_type = RTM_PROPOSAL;
rtm.rtm_msglen = sizeof(rtm);
rtm.rtm_tableid = 0;
rtm.rtm_index = 0;
rtm.rtm_seq = arc4random();
rtm.rtm_priority = RTP_PROPOSAL_SOLICIT;
iov[iovcnt].iov_base = &rtm;
iov[iovcnt++].iov_len = sizeof(rtm);
if (writev(routesock, iov, iovcnt) == -1)
log_warn("failed to send solicitation");
}
void
send_blocklist_fd(void)
{
int bl_fd;
if ((bl_fd = open(main_conf->blocklist_file, O_RDONLY)) != -1)
main_imsg_compose_frontend_fd(IMSG_BLFD, 0, bl_fd);
else
log_warn("%s", main_conf->blocklist_file);
}
void
imsg_receive_config(struct imsg *imsg, struct uw_conf **xconf)
{
struct uw_conf *nconf;
struct uw_forwarder *uw_forwarder;
struct force_tree_entry *force_entry;
nconf = *xconf;
switch (imsg->hdr.type) {
case IMSG_RECONF_CONF:
if (nconf != NULL)
fatalx("%s: IMSG_RECONF_CONF already in "
"progress", __func__);
if (IMSG_DATA_SIZE(*imsg) != sizeof(struct uw_conf))
fatalx("%s: IMSG_RECONF_CONF wrong length: %lu",
__func__, IMSG_DATA_SIZE(*imsg));
if ((*xconf = malloc(sizeof(struct uw_conf))) == NULL)
fatal(NULL);
nconf = *xconf;
memcpy(nconf, imsg->data, sizeof(struct uw_conf));
TAILQ_INIT(&nconf->uw_forwarder_list);
TAILQ_INIT(&nconf->uw_dot_forwarder_list);
RB_INIT(&nconf->force);
break;
case IMSG_RECONF_BLOCKLIST_FILE:
if (((char *)imsg->data)[IMSG_DATA_SIZE(*imsg) - 1] != '\0')
fatalx("Invalid blocklist file");
if ((nconf->blocklist_file = strdup(imsg->data)) ==
NULL)
fatal("%s: strdup", __func__);
break;
case IMSG_RECONF_FORWARDER:
if (IMSG_DATA_SIZE(*imsg) != sizeof(struct uw_forwarder))
fatalx("%s: IMSG_RECONF_FORWARDER wrong length:"
" %lu", __func__, IMSG_DATA_SIZE(*imsg));
if ((uw_forwarder = malloc(sizeof(struct
uw_forwarder))) == NULL)
fatal(NULL);
memcpy(uw_forwarder, imsg->data, sizeof(struct
uw_forwarder));
if (uw_forwarder->ip[sizeof(uw_forwarder->ip) - 1] != '\0')
fatalx("%s: invalid uw_forwarder", __func__);
if (uw_forwarder->auth_name[
sizeof(uw_forwarder->auth_name) - 1] != '\0')
fatalx("%s: invalid uw_forwarder", __func__);
TAILQ_INSERT_TAIL(&nconf->uw_forwarder_list,
uw_forwarder, entry);
break;
case IMSG_RECONF_DOT_FORWARDER:
if (IMSG_DATA_SIZE(*imsg) != sizeof(struct uw_forwarder))
fatalx("%s: IMSG_RECONF_DOT_FORWARDER wrong "
"length: %lu", __func__,
IMSG_DATA_SIZE(*imsg));
if ((uw_forwarder = malloc(sizeof(struct
uw_forwarder))) == NULL)
fatal(NULL);
memcpy(uw_forwarder, imsg->data, sizeof(struct
uw_forwarder));
if (uw_forwarder->ip[sizeof(uw_forwarder->ip) - 1] != '\0')
fatalx("%s: invalid uw_forwarder", __func__);
if (uw_forwarder->auth_name[
sizeof(uw_forwarder->auth_name) - 1] != '\0')
fatalx("%s: invalid uw_forwarder", __func__);
TAILQ_INSERT_TAIL(&nconf->uw_dot_forwarder_list,
uw_forwarder, entry);
break;
case IMSG_RECONF_FORCE:
if (IMSG_DATA_SIZE(*imsg) != sizeof(struct force_tree_entry))
fatalx("%s: IMSG_RECONF_FORCE wrong "
"length: %lu", __func__,
IMSG_DATA_SIZE(*imsg));
if ((force_entry = malloc(sizeof(struct
force_tree_entry))) == NULL)
fatal(NULL);
memcpy(force_entry, imsg->data, sizeof(struct
force_tree_entry));
if (force_entry->domain[
sizeof(force_entry->domain) - 1] != '\0')
fatalx("%s: invalid force_entry", __func__);
if (RB_INSERT(force_tree, &nconf->force, force_entry) != NULL) {
free(force_entry);
fatalx("%s: IMSG_RECONF_FORCE duplicate entry",
__func__);
}
break;
default:
log_debug("%s: error handling imsg %d", __func__,
imsg->hdr.type);
break;
}
}
