/usr/src/usr.sbin/bgpd/bgpd.c

Bug Summary

File:	src/usr.sbin/bgpd/bgpd.c
Warning:	line 328, column 26 Dereference of null pointer
Annotated Source Code

Press '?' to see keyboard shortcuts
Show analyzer invocation
clang -cc1 -cc1 -triple amd64-unknown-openbsd7.0 -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name bgpd.c -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model pic -pic-level 1 -pic-is-pie -mframe-pointer=all -relaxed-aliasing -fno-rounding-math -mconstructor-aliases -munwind-tables -target-cpu x86-64 -target-feature +retpoline-indirect-calls -target-feature +retpoline-indirect-branches -tune-cpu generic -debugger-tuning=gdb -fcoverage-compilation-dir=/usr/src/usr.sbin/bgpd/obj -resource-dir /usr/local/lib/clang/13.0.0 -I /usr/src/usr.sbin/bgpd -internal-isystem /usr/local/lib/clang/13.0.0/include -internal-externc-isystem /usr/include -O2 -fdebug-compilation-dir=/usr/src/usr.sbin/bgpd/obj -ferror-limit 19 -fwrapv -D_RET_PROTECTOR -ret-protector -fgnuc-version=4.2.1 -vectorize-loops -vectorize-slp -fno-builtin-malloc -fno-builtin-calloc -fno-builtin-realloc -fno-builtin-valloc -fno-builtin-free -fno-builtin-strdup -fno-builtin-strndup -analyzer-output=html -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /home/ben/Projects/vmm/scan-build/2022-01-12-194120-40624-1 -x c /usr/src/usr.sbin/bgpd/bgpd.c
1/*	$OpenBSD: bgpd.c,v 1.239 2021/07/20 12:07:46 claudio Exp $ */

3/*
* Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/

19#include <sys/types.h>
20#include <sys/socket.h>
21#include <sys/wait.h>
22#include <netinet/in.h>
23#include <arpa/inet.h>
24#include <err.h>
25#include <errno(*__errno()).h>
26#include <fcntl.h>
27#include <poll.h>
28#include <pwd.h>
29#include <signal.h>
30#include <stdio.h>
31#include <stdlib.h>
32#include <string.h>
33#include <syslog.h>
34#include <unistd.h>

36#include "bgpd.h"
37#include "session.h"
38#include "log.h"
39#include "version.h"

41void		sighdlr(int);
42__dead__attribute__((__noreturn__)) void	usage(void);
43int		main(int, char *[]);
44pid_t		start_child(enum bgpd_process, char *, int, int, int);
45int		send_filterset(struct imsgbuf *, struct filter_set_head *);
46int		reconfigure(char *, struct bgpd_config *);
47int		send_config(struct bgpd_config *);
48int		dispatch_imsg(struct imsgbuf *, int, struct bgpd_config *);
49int		control_setup(struct bgpd_config *);
50static void	getsockpair(int [2]);
51int		imsg_send_sockets(struct imsgbuf *, struct imsgbuf *,
    struct imsgbuf *);
53void		bgpd_rtr_connect(struct rtr_config *);
54void		bgpd_rtr_connect_done(int, struct bgpd_config *);

56int			 cflags;
57volatile sig_atomic_t	 mrtdump;
58volatile sig_atomic_t	 quit;
59volatile sig_atomic_t	 reconfig;
60pid_t			 reconfpid;
61int			 reconfpending;
62struct imsgbuf		*ibuf_se;
63struct imsgbuf		*ibuf_rde;
64struct imsgbuf		*ibuf_rtr;
65struct rib_names	 ribnames = SIMPLEQ_HEAD_INITIALIZER(ribnames){ ((void *)0), &(ribnames).sqh_first };
66char			*cname;
67char			*rcname;

69struct connect_elm {
TAILQ_ENTRY(connect_elm)struct { struct connect_elm *tqe_next; struct connect_elm **tqe_prev
; }	entry;
u_int32_t			id;
int				fd;
73};

75TAILQ_HEAD( ,connect_elm)struct { struct connect_elm *tqh_first; struct connect_elm **
tqh_last; }	connect_queue = \
		    TAILQ_HEAD_INITIALIZER(connect_queue){ ((void *)0), &(connect_queue).tqh_first };
77u_int				connect_cnt;
78#define MAX_CONNECT_CNT32		32

80void
81sighdlr(int sig)
82{
switch (sig) {
case SIGTERM15:
case SIGINT2:
quit = 1;
break;
case SIGHUP1:
reconfig = 1;
break;
case SIGALRM14:
case SIGUSR130:
mrtdump = 1;
break;
}
96}

98__dead__attribute__((__noreturn__)) void
99usage(void)
100{
extern char *__progname;

fprintf(stderr(&__sF[2]), "usage: %s [-cdnvV] [-D macro=value] [-f file]\n",
   __progname);
exit(1);
106}

108#define PFD_PIPE_SESSION0	0
109#define PFD_PIPE_RDE1		1
110#define PFD_PIPE_RTR2		2
111#define PFD_SOCK_ROUTE3		3
112#define PFD_SOCK_PFKEY4		4
113#define PFD_CONNECT_START5	5
114#define MAX_TIMEOUT3600		3600

116int	 cmd_opts;

118int
119main(int argc, char *argv[])
120{
struct bgpd_config	*conf;
enum bgpd_process	 proc = PROC_MAIN;
struct rde_rib		*rr;
struct peer		*p;
struct pollfd		*pfd = NULL((void *)0);
1
'pfd' initialized to a null pointer value→
struct connect_elm	*ce;
time_t			 timeout;
pid_t			 se_pid = 0, rde_pid = 0, rtr_pid = 0, pid;
char			*conffile;
char			*saved_argv0;
u_int			 pfd_elms = 0, npfd, i;
int			 debug = 0;
int			 rfd, keyfd;
int			 ch, status;
int			 pipe_m2s[2];
int			 pipe_m2r[2];
int			 pipe_m2roa[2];

conffile = CONFFILE"/etc/bgpd.conf";

log_init(1, LOG_DAEMON(3<<3));	/* log to stderr until daemonized */
log_procinit(log_procnames[PROC_MAIN]);
log_setverbose(1);

saved_argv0 = argv[0];
if (saved_argv0 == NULL((void *)0))
2
←
Assuming 'saved_argv0' is not equal to NULL→
3
←
Taking false branch→
saved_argv0 = "bgpd";

while ((ch = getopt(argc, argv, "cdD:f:nRSTvV")) != -1) {
4
←
Assuming the condition is false→
5
←
Loop condition is false. Execution continues on line 191→
switch (ch) {
case 'c':
	cmd_opts |= BGPD_OPT_FORCE_DEMOTE0x0008;
	break;
case 'd':
	debug = 1;
	break;
case 'D':
	if (cmdline_symset(optarg) < 0)
		log_warnx("could not parse macro definition %s",
		    optarg);
	break;
case 'f':
	conffile = optarg;
	break;
case 'n':
	cmd_opts |= BGPD_OPT_NOACTION0x0004;
	break;
case 'v':
	if (cmd_opts & BGPD_OPT_VERBOSE0x0001)
		cmd_opts |= BGPD_OPT_VERBOSE20x0002;
	cmd_opts |= BGPD_OPT_VERBOSE0x0001;
	break;
case 'R':
	proc = PROC_RDE;
	break;
case 'S':
	proc = PROC_SE;
	break;
case 'T':
	proc = PROC_RTR;
	break;
case 'V':
	fprintf(stderr(&__sF[2]), "OpenBGPD %s\n", BGPD_VERSION"7.2");
	return 0;
default:
	usage();
	/* NOTREACHED */
}
}

argc -= optind;
argv += optind;
if (argc > 0)
6
←
Assuming 'argc' is <= 0→
7
←
Taking false branch→
usage();

if (cmd_opts & BGPD_OPT_NOACTION0x0004) {
8
←
Assuming the condition is false→
9
←
Taking false branch→
if ((conf = parse_config(conffile, NULL((void *)0), NULL((void *)0))) == NULL((void *)0))
	exit(1);

if (cmd_opts & BGPD_OPT_VERBOSE0x0001)
	print_config(conf, &ribnames);
else
	fprintf(stderr(&__sF[2]), "configuration OK\n");

while ((rr = SIMPLEQ_FIRST(&ribnames)((&ribnames)->sqh_first)) != NULL((void *)0)) {
	SIMPLEQ_REMOVE_HEAD(&ribnames, entry)do { if (((&ribnames)->sqh_first = (&ribnames)->
sqh_first->entry.sqe_next) == ((void *)0)) (&ribnames)
->sqh_last = &(&ribnames)->sqh_first; } while (
0);
	free(rr);
}
free_config(conf);
exit(0);
}

switch (proc) {
10
←
Control jumps to 'case PROC_MAIN:'  at line 214→
case PROC_MAIN:
break;
11
←
 Execution continues on line 227→
case PROC_RDE:
rde_main(debug, cmd_opts & BGPD_OPT_VERBOSE0x0001);
/* NOTREACHED */
case PROC_SE:
session_main(debug, cmd_opts & BGPD_OPT_VERBOSE0x0001);
/* NOTREACHED */
case PROC_RTR:
rtr_main(debug, cmd_opts & BGPD_OPT_VERBOSE0x0001);
/* NOTREACHED */
}

if (geteuid())
12
←
Assuming the condition is false→
13
←
Taking false branch→
errx(1, "need root privileges");

if (getpwnam(BGPD_USER"_bgpd") == NULL((void *)0))
14
←
Assuming the condition is false→
15
←
Taking false branch→
errx(1, "unknown user %s", BGPD_USER"_bgpd");

if ((conf = parse_config(conffile, NULL((void *)0), NULL((void *)0))) == NULL((void *)0)) {
16
←
Assuming the condition is false→
17
←
Taking false branch→
log_warnx("config file %s has errors", conffile);
exit(1);
}

if (prepare_listeners(conf) == -1)
18
←
Assuming the condition is false→
19
←
Taking false branch→
exit(1);

log_init(debug, LOG_DAEMON(3<<3));
log_setverbose(cmd_opts & BGPD_OPT_VERBOSE0x0001);

if (!debug19.1
'debug' is 0
)
20
←
Taking true branch→
daemon(1, 0);

log_info("startup");

getsockpair(pipe_m2s);
getsockpair(pipe_m2r);
getsockpair(pipe_m2roa);

/* fork children */
rde_pid = start_child(PROC_RDE, saved_argv0, pipe_m2r[1], debug,
   cmd_opts & BGPD_OPT_VERBOSE0x0001);
se_pid = start_child(PROC_SE, saved_argv0, pipe_m2s[1], debug,
   cmd_opts & BGPD_OPT_VERBOSE0x0001);
rtr_pid = start_child(PROC_RTR, saved_argv0, pipe_m2roa[1], debug,
   cmd_opts & BGPD_OPT_VERBOSE0x0001);

signal(SIGTERM15, sighdlr);
signal(SIGINT2, sighdlr);
signal(SIGHUP1, sighdlr);
signal(SIGALRM14, sighdlr);
signal(SIGUSR130, sighdlr);
signal(SIGPIPE13, SIG_IGN(void (*)(int))1);

if ((ibuf_se = malloc(sizeof(struct imsgbuf))) == NULL((void *)0) ||
21
←
Assuming the condition is false→
24
←
Taking false branch→
   (ibuf_rde = malloc(sizeof(struct imsgbuf))) == NULL((void *)0) ||
22
←
Assuming the condition is false→
   (ibuf_rtr = malloc(sizeof(struct imsgbuf))) == NULL((void *)0))
23
←
Assuming the condition is false→
fatal(NULL((void *)0));
imsg_init(ibuf_se, pipe_m2s[0]);
imsg_init(ibuf_rde, pipe_m2r[0]);
imsg_init(ibuf_rtr, pipe_m2roa[0]);
mrt_init(ibuf_rde, ibuf_se);
if (kr_init(&rfd) == -1)
25
←
Assuming the condition is false→
26
←
Taking false branch→
quit = 1;
keyfd = pfkey_init();

/*
* rpath, read config file
* cpath, unlink control socket
* fattr, chmod on control socket
* wpath, needed if we are doing mrt dumps
*
* pledge placed here because kr_init() does a setsockopt on the
* routing socket thats not allowed at all.
*/
289#if 0
/*
* disabled because we do ioctls on /dev/pf and SIOCSIFGATTR
* this needs some redesign of bgpd to be fixed.
*/
294BROKEN	if (pledge("stdio rpath wpath cpath fattr unix route recvfd sendfd",
   NULL((void *)0)) == -1)
fatal("pledge");
297#endif

if (imsg_send_sockets(ibuf_se, ibuf_rde, ibuf_rtr))
27
←
Taking false branch→
fatal("could not establish imsg links");
/* control setup needs to happen late since it sends imsgs */
if (control_setup(conf) == -1)
28
←
Taking false branch→
quit = 1;
if (send_config(conf) != 0)
29
←
Assuming the condition is false→
30
←
Taking false branch→
quit = 1;
if (pftable_clear_all() != 0)
31
←
Assuming the condition is false→
32
←
Taking false branch→
quit = 1;

while (quit == 0) {
33
←
Assuming 'quit' is equal to 0→
34
←
Loop condition is true.  Entering loop body→
if (pfd_elms < PFD_CONNECT_START5 + connect_cnt) {
35
←
Assuming the condition is false→
36
←
Taking false branch→
	struct pollfd *newp;

	if ((newp = reallocarray(pfd,
	    PFD_CONNECT_START5 + connect_cnt,
	    sizeof(struct pollfd))) == NULL((void *)0)) {
		log_warn("could not resize pfd from %u -> %u"
		    " entries", pfd_elms, PFD_CONNECT_START5 +
		    connect_cnt);
		fatalx("exiting");
	}
	pfd = newp;
	pfd_elms = PFD_CONNECT_START5 + connect_cnt;
}
bzero(pfd, sizeof(struct pollfd) * pfd_elms);

timeout = mrt_timeout(conf->mrt);

pfd[PFD_SOCK_ROUTE3].fd = rfd;
37
←
Dereference of null pointer
pfd[PFD_SOCK_ROUTE3].events = POLLIN0x0001;

pfd[PFD_SOCK_PFKEY4].fd = keyfd;
pfd[PFD_SOCK_PFKEY4].events = POLLIN0x0001;

set_pollfd(&pfd[PFD_PIPE_SESSION0], ibuf_se);
set_pollfd(&pfd[PFD_PIPE_RDE1], ibuf_rde);
set_pollfd(&pfd[PFD_PIPE_RTR2], ibuf_rtr);

npfd = PFD_CONNECT_START5;
TAILQ_FOREACH(ce, &connect_queue, entry)for((ce) = ((&connect_queue)->tqh_first); (ce) != ((void
 *)0); (ce) = ((ce)->entry.tqe_next)) {
	pfd[npfd].fd = ce->fd;
	pfd[npfd++].events = POLLOUT0x0004;
	if (npfd > pfd_elms)
		fatalx("polli pfd overflow");
}

if (timeout < 0 || timeout > MAX_TIMEOUT3600)
	timeout = MAX_TIMEOUT3600;
if (poll(pfd, npfd, timeout * 1000) == -1)
	if (errno(*__errno()) != EINTR4) {
		log_warn("poll error");
		quit = 1;
	}

if (handle_pollfd(&pfd[PFD_PIPE_SESSION0], ibuf_se) == -1) {
	log_warnx("main: Lost connection to SE");
	msgbuf_clear(&ibuf_se->w);
	free(ibuf_se);
	ibuf_se = NULL((void *)0);
	quit = 1;
} else {
	if (dispatch_imsg(ibuf_se, PFD_PIPE_SESSION0, conf) ==
	    -1)
		quit = 1;
}

if (handle_pollfd(&pfd[PFD_PIPE_RDE1], ibuf_rde) == -1) {
	log_warnx("main: Lost connection to RDE");
	msgbuf_clear(&ibuf_rde->w);
	free(ibuf_rde);
	ibuf_rde = NULL((void *)0);
	quit = 1;
} else {
	if (dispatch_imsg(ibuf_rde, PFD_PIPE_RDE1, conf) == -1)
		quit = 1;
}

if (handle_pollfd(&pfd[PFD_PIPE_RTR2], ibuf_rtr) == -1) {
	log_warnx("main: Lost connection to RTR");
	msgbuf_clear(&ibuf_rtr->w);
	free(ibuf_rtr);
	ibuf_rtr = NULL((void *)0);
	quit = 1;
} else {
	if (dispatch_imsg(ibuf_rtr, PFD_PIPE_RTR2, conf) == -1)
		quit = 1;
}

if (pfd[PFD_SOCK_ROUTE3].revents & POLLIN0x0001) {
	if (kr_dispatch_msg(conf->default_tableid) == -1)
		quit = 1;
}

if (pfd[PFD_SOCK_PFKEY4].revents & POLLIN0x0001) {
	if (pfkey_read(keyfd, NULL((void *)0)) == -1) {
		log_warnx("pfkey_read failed, exiting...");
		quit = 1;
	}
}

for (i = PFD_CONNECT_START5; i < npfd; i++)
	if (pfd[i].revents != 0)
		bgpd_rtr_connect_done(pfd[i].fd, conf);

if (reconfig) {
	u_int	error;

	reconfig = 0;
	switch (reconfigure(conffile, conf)) {
	case -1:	/* fatal error */
		quit = 1;
		break;
	case 0:		/* all OK */
		error = 0;
		break;
	case 2:
		log_info("previous reload still running");
		error = CTL_RES_PENDING;
		break;
	default:	/* parse error */
		log_warnx("config file %s has errors, "
		    "not reloading", conffile);
		error = CTL_RES_PARSE_ERROR;
		break;
	}
	if (reconfpid != 0) {
		send_imsg_session(IMSG_CTL_RESULT, reconfpid,
		    &error, sizeof(error));
		reconfpid = 0;
	}
}

if (mrtdump) {
	mrtdump = 0;
	mrt_handler(conf->mrt);
}
}

/* close pipes */
if (ibuf_se) {
msgbuf_clear(&ibuf_se->w);
close(ibuf_se->fd);
free(ibuf_se);
ibuf_se = NULL((void *)0);
}
if (ibuf_rde) {
msgbuf_clear(&ibuf_rde->w);
close(ibuf_rde->fd);
free(ibuf_rde);
ibuf_rde = NULL((void *)0);
}
if (ibuf_rtr) {
msgbuf_clear(&ibuf_rtr->w);
close(ibuf_rtr->fd);
free(ibuf_rtr);
ibuf_rtr = NULL((void *)0);
}

/* cleanup kernel data structures */
carp_demote_shutdown();
kr_shutdown(conf->fib_priority, conf->default_tableid);
pftable_clear_all();

RB_FOREACH(p, peer_head, &conf->peers)for ((p) = peer_head_RB_MINMAX(&conf->peers, -1); (p) !=
 ((void *)0); (p) = peer_head_RB_NEXT(p))
pfkey_remove(p);

while ((rr = SIMPLEQ_FIRST(&ribnames)((&ribnames)->sqh_first)) != NULL((void *)0)) {
SIMPLEQ_REMOVE_HEAD(&ribnames, entry)do { if (((&ribnames)->sqh_first = (&ribnames)->
sqh_first->entry.sqe_next) == ((void *)0)) (&ribnames)
->sqh_last = &(&ribnames)->sqh_first; } while (
0);
free(rr);
}
free_config(conf);

log_debug("waiting for children to terminate");
do {
pid = wait(&status);
if (pid == -1) {
	if (errno(*__errno()) != EINTR4 && errno(*__errno()) != ECHILD10)
		fatal("wait");
} else if (WIFSIGNALED(status)(((status) & 0177) != 0177 && ((status) & 0177
) != 0)) {
	char *name = "unknown process";
	if (pid == rde_pid)
		name = "route decision engine";
	else if (pid == se_pid)
		name = "session engine";
	else if (pid == rtr_pid)
		name = "rtr engine";
	log_warnx("%s terminated; signal %d", name,
		WTERMSIG(status)(((status) & 0177)));
}
} while (pid != -1 || (pid == -1 && errno(*__errno()) == EINTR4));

free(rcname);
free(cname);

log_info("terminating");
return (0);
496}

498pid_t
499start_child(enum bgpd_process p, char *argv0, int fd, int debug, int verbose)
500{
char *argv[5];
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_SETFD2, 0) == -1)
fatal("cannot setup imsg fd");

argv[argc++] = argv0;
switch (p) {
case PROC_MAIN:
fatalx("Can not start main process");
case PROC_RDE:
argv[argc++] = "-R";
break;
case PROC_SE:
argv[argc++] = "-S";
break;
case PROC_RTR:
argv[argc++] = "-T";
break;
}
if (debug)
argv[argc++] = "-d";
if (verbose)
argv[argc++] = "-v";
argv[argc++] = NULL((void *)0);

execvp(argv0, argv);
fatal("execvp");
543}

545int
546send_filterset(struct imsgbuf *i, struct filter_set_head *set)
547{
struct filter_set	*s;

TAILQ_FOREACH(s, set, entry)for((s) = ((set)->tqh_first); (s) != ((void *)0); (s) = ((
s)->entry.tqe_next))
if (imsg_compose(i, IMSG_FILTER_SET, 0, 0, -1, s,
    sizeof(struct filter_set)) == -1)
	return (-1);
return (0);
555}

557int
558reconfigure(char *conffile, struct bgpd_config *conf)
559{
struct bgpd_config	*new_conf;

if (reconfpending)
return (2);

log_info("rereading config");
if ((new_conf = parse_config(conffile, &conf->peers,
   &conf->rtrs)) == NULL((void *)0))
return (1);

merge_config(conf, new_conf);

if (prepare_listeners(conf) == -1) {
return (1);
}

if (control_setup(conf) == -1) {
return (1);
}

return send_config(conf);
581}

583int
584send_config(struct bgpd_config *conf)
585{
struct peer		*p;
struct filter_rule	*r;
struct listen_addr	*la;
struct rde_rib		*rr;
struct l3vpn		*vpn;
struct as_set		*aset;
struct prefixset	*ps;
struct prefixset_item	*psi, *npsi;
struct roa		*roa, *nroa;
struct rtr_config	*rtr;

reconfpending = 3;	/* one per child */

expand_networks(conf);

cflags = conf->flags;

/* start reconfiguration */
if (imsg_compose(ibuf_se, IMSG_RECONF_CONF, 0, 0, -1,
   conf, sizeof(*conf)) == -1)
return (-1);
if (imsg_compose(ibuf_rde, IMSG_RECONF_CONF, 0, 0, -1,
   conf, sizeof(*conf)) == -1)
return (-1);
if (imsg_compose(ibuf_rtr, IMSG_RECONF_CONF, 0, 0, -1,
   conf, sizeof(*conf)) == -1)
return (-1);

TAILQ_FOREACH(la, conf->listen_addrs, entry)for((la) = ((conf->listen_addrs)->tqh_first); (la) != (
(void *)0); (la) = ((la)->entry.tqe_next)) {
if (imsg_compose(ibuf_se, IMSG_RECONF_LISTENER, 0, 0, la->fd,
    la, sizeof(*la)) == -1)
	return (-1);
la->fd = -1;
}

/* adjust fib syncing on reload */
ktable_preload();

/* RIBs for the RDE */
while ((rr = SIMPLEQ_FIRST(&ribnames)((&ribnames)->sqh_first))) {
SIMPLEQ_REMOVE_HEAD(&ribnames, entry)do { if (((&ribnames)->sqh_first = (&ribnames)->
sqh_first->entry.sqe_next) == ((void *)0)) (&ribnames)
->sqh_last = &(&ribnames)->sqh_first; } while (
0);
if (ktable_update(rr->rtableid, rr->name, rr->flags,
    conf->fib_priority) == -1) {
	log_warnx("failed to load rdomain %d",
	    rr->rtableid);
	return (-1);
}
if (imsg_compose(ibuf_rde, IMSG_RECONF_RIB, 0, 0, -1,
    rr, sizeof(*rr)) == -1)
	return (-1);
free(rr);
}

/* send peer list to the SE */
RB_FOREACH(p, peer_head, &conf->peers)for ((p) = peer_head_RB_MINMAX(&conf->peers, -1); (p) !=
 ((void *)0); (p) = peer_head_RB_NEXT(p)) {
if (imsg_compose(ibuf_se, IMSG_RECONF_PEER, p->conf.id, 0, -1,
    &p->conf, sizeof(p->conf)) == -1)
	return (-1);

if (p->reconf_action == RECONF_REINIT)
	if (pfkey_establish(p) == -1)
		log_peer_warnx(&p->conf, "pfkey setup failed");
}

/* networks go via kroute to the RDE */
kr_net_reload(conf->default_tableid, 0, &conf->networks);

/* prefixsets for filters in the RDE */
while ((ps = SIMPLEQ_FIRST(&conf->prefixsets)((&conf->prefixsets)->sqh_first)) != NULL((void *)0)) {
SIMPLEQ_REMOVE_HEAD(&conf->prefixsets, entry)do { if (((&conf->prefixsets)->sqh_first = (&conf
->prefixsets)->sqh_first->entry.sqe_next) == ((void *
)0)) (&conf->prefixsets)->sqh_last = &(&conf
->prefixsets)->sqh_first; } while (0);
if (imsg_compose(ibuf_rde, IMSG_RECONF_PREFIX_SET, 0, 0, -1,
    ps->name, sizeof(ps->name)) == -1)
	return (-1);
RB_FOREACH_SAFE(psi, prefixset_tree, &ps->psitems, npsi)for ((psi) = prefixset_tree_RB_MINMAX(&ps->psitems, -1
); ((psi) != ((void *)0)) && ((npsi) = prefixset_tree_RB_NEXT
(psi), 1); (psi) = (npsi)) {
	RB_REMOVE(prefixset_tree, &ps->psitems, psi)prefixset_tree_RB_REMOVE(&ps->psitems, psi);
	if (imsg_compose(ibuf_rde, IMSG_RECONF_PREFIX_SET_ITEM,
	    0, 0, -1, psi, sizeof(*psi)) == -1)
		return (-1);
	free(psi);
}
free(ps);
}

/* originsets for filters in the RDE */
while ((ps = SIMPLEQ_FIRST(&conf->originsets)((&conf->originsets)->sqh_first)) != NULL((void *)0)) {
SIMPLEQ_REMOVE_HEAD(&conf->originsets, entry)do { if (((&conf->originsets)->sqh_first = (&conf
->originsets)->sqh_first->entry.sqe_next) == ((void *
)0)) (&conf->originsets)->sqh_last = &(&conf
->originsets)->sqh_first; } while (0);
if (imsg_compose(ibuf_rde, IMSG_RECONF_ORIGIN_SET, 0, 0, -1,
    ps->name, sizeof(ps->name)) == -1)
	return (-1);
RB_FOREACH_SAFE(roa, roa_tree, &ps->roaitems, nroa)for ((roa) = roa_tree_RB_MINMAX(&ps->roaitems, -1); ((
roa) != ((void *)0)) && ((nroa) = roa_tree_RB_NEXT(roa
), 1); (roa) = (nroa)) {
	RB_REMOVE(roa_tree, &ps->roaitems, roa)roa_tree_RB_REMOVE(&ps->roaitems, roa);
	if (imsg_compose(ibuf_rde, IMSG_RECONF_ROA_ITEM, 0, 0,
	    -1, roa, sizeof(*roa)) == -1)
		return (-1);
	free(roa);
}
free(ps);
}

/* roa table and rtr config are sent to the RTR engine */
RB_FOREACH_SAFE(roa, roa_tree, &conf->roa, nroa)for ((roa) = roa_tree_RB_MINMAX(&conf->roa, -1); ((roa
) != ((void *)0)) && ((nroa) = roa_tree_RB_NEXT(roa),
 1); (roa) = (nroa)) {
RB_REMOVE(roa_tree, &conf->roa, roa)roa_tree_RB_REMOVE(&conf->roa, roa);
if (imsg_compose(ibuf_rtr, IMSG_RECONF_ROA_ITEM, 0, 0,
    -1, roa, sizeof(*roa)) == -1)
	return (-1);
free(roa);
}
SIMPLEQ_FOREACH(rtr, &conf->rtrs, entry)for((rtr) = ((&conf->rtrs)->sqh_first); (rtr) != ((
void *)0); (rtr) = ((rtr)->entry.sqe_next)) {
if (imsg_compose(ibuf_rtr, IMSG_RECONF_RTR_CONFIG, rtr->id,
    0, -1, rtr->descr, sizeof(rtr->descr)) == -1)
	return (-1);
}

/* as-sets for filters in the RDE */
while ((aset = SIMPLEQ_FIRST(&conf->as_sets)((&conf->as_sets)->sqh_first)) != NULL((void *)0)) {
struct ibuf *wbuf;
u_int32_t *as;
size_t i, l, n;

SIMPLEQ_REMOVE_HEAD(&conf->as_sets, entry)do { if (((&conf->as_sets)->sqh_first = (&conf->
as_sets)->sqh_first->entry.sqe_next) == ((void *)0)) (&
conf->as_sets)->sqh_last = &(&conf->as_sets)
->sqh_first; } while (0);

as = set_get(aset->set, &n);
if ((wbuf = imsg_create(ibuf_rde, IMSG_RECONF_AS_SET, 0, 0,
    sizeof(n) + sizeof(aset->name))) == NULL((void *)0))
	return -1;
if (imsg_add(wbuf, &n, sizeof(n)) == -1 ||
    imsg_add(wbuf, aset->name, sizeof(aset->name)) == -1)
	return -1;
imsg_close(ibuf_rde, wbuf);

for (i = 0; i < n; i += l) {
	l = (n - i > 1024 ? 1024 : n - i);
	if (imsg_compose(ibuf_rde, IMSG_RECONF_AS_SET_ITEMS,
	    0, 0, -1, as + i, l * sizeof(*as)) == -1)
		return -1;
}

if (imsg_compose(ibuf_rde, IMSG_RECONF_AS_SET_DONE, 0, 0, -1,
    NULL((void *)0), 0) == -1)
	return -1;

set_free(aset->set);
free(aset);
}

/* filters for the RDE */
while ((r = TAILQ_FIRST(conf->filters)((conf->filters)->tqh_first)) != NULL((void *)0)) {
TAILQ_REMOVE(conf->filters, r, entry)do { if (((r)->entry.tqe_next) != ((void *)0)) (r)->entry
.tqe_next->entry.tqe_prev = (r)->entry.tqe_prev; else (
conf->filters)->tqh_last = (r)->entry.tqe_prev; *(r)
->entry.tqe_prev = (r)->entry.tqe_next; ; ; } while (0);
if (send_filterset(ibuf_rde, &r->set) == -1)
	return (-1);
if (imsg_compose(ibuf_rde, IMSG_RECONF_FILTER, 0, 0, -1,
    r, sizeof(struct filter_rule)) == -1)
	return (-1);
filterset_free(&r->set);
free(r);
}

while ((vpn = SIMPLEQ_FIRST(&conf->l3vpns)((&conf->l3vpns)->sqh_first)) != NULL((void *)0)) {
SIMPLEQ_REMOVE_HEAD(&conf->l3vpns, entry)do { if (((&conf->l3vpns)->sqh_first = (&conf->
l3vpns)->sqh_first->entry.sqe_next) == ((void *)0)) (&
conf->l3vpns)->sqh_last = &(&conf->l3vpns)->
sqh_first; } while (0);
if (ktable_update(vpn->rtableid, vpn->descr, vpn->flags,
    conf->fib_priority) == -1) {
	log_warnx("failed to load rdomain %d",
	    vpn->rtableid);
	return (-1);
}
/* networks go via kroute to the RDE */
kr_net_reload(vpn->rtableid, vpn->rd, &vpn->net_l);

if (imsg_compose(ibuf_rde, IMSG_RECONF_VPN, 0, 0, -1,
    vpn, sizeof(*vpn)) == -1)
	return (-1);

/* export targets */
if (send_filterset(ibuf_rde, &vpn->export) == -1)
	return (-1);
if (imsg_compose(ibuf_rde, IMSG_RECONF_VPN_EXPORT, 0, 0,
    -1, NULL((void *)0), 0) == -1)
	return (-1);
filterset_free(&vpn->export);

/* import targets */
if (send_filterset(ibuf_rde, &vpn->import) == -1)
	return (-1);
if (imsg_compose(ibuf_rde, IMSG_RECONF_VPN_IMPORT, 0, 0,
    -1, NULL((void *)0), 0) == -1)
	return (-1);
filterset_free(&vpn->import);

if (imsg_compose(ibuf_rde, IMSG_RECONF_VPN_DONE, 0, 0,
    -1, NULL((void *)0), 0) == -1)
	return (-1);

free(vpn);
}

/* send a drain message to know when all messages where processed */
if (imsg_compose(ibuf_se, IMSG_RECONF_DRAIN, 0, 0, -1, NULL((void *)0), 0) == -1)
return (-1);
if (imsg_compose(ibuf_rde, IMSG_RECONF_DRAIN, 0, 0, -1, NULL((void *)0), 0) == -1)
return (-1);
if (imsg_compose(ibuf_rtr, IMSG_RECONF_DRAIN, 0, 0, -1, NULL((void *)0), 0) == -1)
return (-1);

/* mrt changes can be sent out of bound */
mrt_reconfigure(conf->mrt);
return (0);
792}

794int
795dispatch_imsg(struct imsgbuf *ibuf, int idx, struct bgpd_config *conf)
796{
struct imsg		 imsg;
struct peer		*p;
struct rtr_config	*r;
ssize_t			 n;
int			 rv, verbose;

rv = 0;
while (ibuf) {
if ((n = imsg_get(ibuf, &imsg)) == -1)
	return (-1);

if (n == 0)
	break;

switch (imsg.hdr.type) {
case IMSG_KROUTE_CHANGE:
	if (idx != PFD_PIPE_RDE1)
		log_warnx("route request not from RDE");
	else if (imsg.hdr.len != IMSG_HEADER_SIZEsizeof(struct imsg_hdr) +
	    sizeof(struct kroute_full))
		log_warnx("wrong imsg len");
	else if (kr_change(imsg.hdr.peerid, imsg.data,
	    conf->fib_priority))
		rv = -1;
	break;
case IMSG_KROUTE_DELETE:
	if (idx != PFD_PIPE_RDE1)
		log_warnx("route request not from RDE");
	else if (imsg.hdr.len != IMSG_HEADER_SIZEsizeof(struct imsg_hdr) +
	    sizeof(struct kroute_full))
		log_warnx("wrong imsg len");
	else if (kr_delete(imsg.hdr.peerid, imsg.data,
	    conf->fib_priority))
		rv = -1;
	break;
case IMSG_KROUTE_FLUSH:
	if (idx != PFD_PIPE_RDE1)
		log_warnx("route request not from RDE");
	else if (imsg.hdr.len != IMSG_HEADER_SIZEsizeof(struct imsg_hdr))
		log_warnx("wrong imsg len");
	else if (kr_flush(imsg.hdr.peerid))
		rv = -1;
	break;
case IMSG_NEXTHOP_ADD:
	if (idx != PFD_PIPE_RDE1)
		log_warnx("nexthop request not from RDE");
	else if (imsg.hdr.len != IMSG_HEADER_SIZEsizeof(struct imsg_hdr) +
	    sizeof(struct bgpd_addr))
		log_warnx("wrong imsg len");
	else if (kr_nexthop_add(imsg.hdr.peerid, imsg.data,
	    conf) == -1)
		rv = -1;
	break;
case IMSG_NEXTHOP_REMOVE:
	if (idx != PFD_PIPE_RDE1)
		log_warnx("nexthop request not from RDE");
	else if (imsg.hdr.len != IMSG_HEADER_SIZEsizeof(struct imsg_hdr) +
	    sizeof(struct bgpd_addr))
		log_warnx("wrong imsg len");
	else
		kr_nexthop_delete(imsg.hdr.peerid, imsg.data,
		    conf);
	break;
case IMSG_PFTABLE_ADD:
	if (idx != PFD_PIPE_RDE1)
		log_warnx("pftable request not from RDE");
	else
		if (imsg.hdr.len != IMSG_HEADER_SIZEsizeof(struct imsg_hdr) +
		    sizeof(struct pftable_msg))
			log_warnx("wrong imsg len");
		else if (pftable_addr_add(imsg.data) != 0)
			rv = -1;
	break;
case IMSG_PFTABLE_REMOVE:
	if (idx != PFD_PIPE_RDE1)
		log_warnx("pftable request not from RDE");
	else
		if (imsg.hdr.len != IMSG_HEADER_SIZEsizeof(struct imsg_hdr) +
		    sizeof(struct pftable_msg))
			log_warnx("wrong imsg len");
		else if (pftable_addr_remove(imsg.data) != 0)
			rv = -1;
	break;
case IMSG_PFTABLE_COMMIT:
	if (idx != PFD_PIPE_RDE1)
		log_warnx("pftable request not from RDE");
	else if (imsg.hdr.len != IMSG_HEADER_SIZEsizeof(struct imsg_hdr))
		log_warnx("wrong imsg len");
	else if (pftable_commit() != 0)
		rv = -1;
	break;
case IMSG_PFKEY_RELOAD:
	if (idx != PFD_PIPE_SESSION0) {
		log_warnx("pfkey reload request not from SE");
		break;
	}
	p = getpeerbyid(conf, imsg.hdr.peerid);
	if (p != NULL((void *)0)) {
		if (pfkey_establish(p) == -1)
			log_peer_warnx(&p->conf,
			    "pfkey setup failed");
	}
	break;
case IMSG_CTL_RELOAD:
	if (idx != PFD_PIPE_SESSION0)
		log_warnx("reload request not from SE");
	else {
		reconfig = 1;
		reconfpid = imsg.hdr.pid;
		if (imsg.hdr.len == IMSG_HEADER_SIZEsizeof(struct imsg_hdr) +
		    REASON_LEN256 && ((char *)imsg.data)[0])
			log_info("reload due to: %s",
			    log_reason(imsg.data));
	}
	break;
case IMSG_CTL_FIB_COUPLE:
	if (idx != PFD_PIPE_SESSION0)
		log_warnx("couple request not from SE");
	else
		kr_fib_couple(imsg.hdr.peerid,
		    conf->fib_priority);
	break;
case IMSG_CTL_FIB_DECOUPLE:
	if (idx != PFD_PIPE_SESSION0)
		log_warnx("decouple request not from SE");
	else
		kr_fib_decouple(imsg.hdr.peerid,
		    conf->fib_priority);
	break;
case IMSG_CTL_KROUTE:
case IMSG_CTL_KROUTE_ADDR:
case IMSG_CTL_SHOW_NEXTHOP:
case IMSG_CTL_SHOW_INTERFACE:
case IMSG_CTL_SHOW_FIB_TABLES:
	if (idx != PFD_PIPE_SESSION0)
		log_warnx("kroute request not from SE");
	else
		kr_show_route(&imsg);
	break;
case IMSG_IFINFO:
	if (idx != PFD_PIPE_SESSION0)
		log_warnx("IFINFO request not from SE");
	else if (imsg.hdr.len != IMSG_HEADER_SIZEsizeof(struct imsg_hdr) + IFNAMSIZ16)
		log_warnx("IFINFO request with wrong len");
	else
		kr_ifinfo(imsg.data);
	break;
case IMSG_DEMOTE:
	if (idx != PFD_PIPE_SESSION0)
		log_warnx("demote request not from SE");
	else if (imsg.hdr.len != IMSG_HEADER_SIZEsizeof(struct imsg_hdr) +
	    sizeof(struct demote_msg))
		log_warnx("DEMOTE request with wrong len");
	else {
		struct demote_msg	*msg;

		msg = imsg.data;
		carp_demote_set(msg->demote_group, msg->level);
	}
	break;
case IMSG_CTL_LOG_VERBOSE:
	/* already checked by SE */
	memcpy(&verbose, imsg.data, sizeof(verbose));
	log_setverbose(verbose);
	break;
case IMSG_RECONF_DONE:
	if (reconfpending == 0) {
		log_warnx("unexpected RECONF_DONE received");
		break;
	}
	if (idx == PFD_PIPE_SESSION0) {
		imsg_compose(ibuf_rtr, IMSG_RECONF_DONE, 0,
		    0, -1, NULL((void *)0), 0);
	} else if (idx == PFD_PIPE_RTR2) {
		imsg_compose(ibuf_rde, IMSG_RECONF_DONE, 0,
		    0, -1, NULL((void *)0), 0);

		/* finally fix kroute information */
		ktable_postload(conf->fib_priority);

		/* redistribute list needs to be reloaded too */
		kr_reload();
	}
	reconfpending--;
	break;
case IMSG_RECONF_DRAIN:
	if (reconfpending == 0) {
		log_warnx("unexpected RECONF_DRAIN received");
		break;
	}
	reconfpending--;
	if (reconfpending == 0) {
		/*
		 * SE goes first to bring templated neighbors
		 * in sync.
		 */
		imsg_compose(ibuf_se, IMSG_RECONF_DONE, 0,
		    0, -1, NULL((void *)0), 0);
		reconfpending = 3; /* expecting 2 DONE msg */
	}
	break;
case IMSG_SOCKET_CONN:
	if (idx != PFD_PIPE_RTR2) {
		log_warnx("connect request not from RTR");
	} else {
		SIMPLEQ_FOREACH(r, &conf->rtrs, entry)for((r) = ((&conf->rtrs)->sqh_first); (r) != ((void
 *)0); (r) = ((r)->entry.sqe_next)) {
			if (imsg.hdr.peerid == r->id)
				break;
		}
		if (r == NULL((void *)0))
			log_warnx("unknown rtr id %d",
			    imsg.hdr.peerid);
		else
			bgpd_rtr_connect(r);
	}
	break;
case IMSG_CTL_SHOW_RTR:
	if (idx == PFD_PIPE_SESSION0) {
		SIMPLEQ_FOREACH(r, &conf->rtrs, entry)for((r) = ((&conf->rtrs)->sqh_first); (r) != ((void
 *)0); (r) = ((r)->entry.sqe_next)) {
			imsg_compose(ibuf_rtr, imsg.hdr.type,
			    r->id, imsg.hdr.pid, -1, NULL((void *)0), 0);
		}
		imsg_compose(ibuf_rtr, IMSG_CTL_END,
		    0, imsg.hdr.pid, -1, NULL((void *)0), 0);
	} else if (imsg.hdr.len != IMSG_HEADER_SIZEsizeof(struct imsg_hdr) +
	    sizeof(struct ctl_show_rtr)) {
		log_warnx("IMSG_CTL_SHOW_RTR with wrong len");
	} else if (idx == PFD_PIPE_RTR2) {
		SIMPLEQ_FOREACH(r, &conf->rtrs, entry)for((r) = ((&conf->rtrs)->sqh_first); (r) != ((void
 *)0); (r) = ((r)->entry.sqe_next)) {
			if (imsg.hdr.peerid == r->id)
				break;
		}
		if (r != NULL((void *)0)) {
			struct ctl_show_rtr *msg;
			msg = imsg.data;
			strlcpy(msg->descr, r->descr,
			    sizeof(msg->descr));
			msg->local_addr = r->local_addr;
			msg->remote_addr = r->remote_addr;
			msg->remote_port = r->remote_port;

			imsg_compose(ibuf_se, imsg.hdr.type,
			    imsg.hdr.peerid, imsg.hdr.pid,
			    -1, imsg.data,
			    imsg.hdr.len - IMSG_HEADER_SIZEsizeof(struct imsg_hdr));
		}
	}
	break;
case IMSG_CTL_END:
case IMSG_CTL_SHOW_TIMER:
	if (idx != PFD_PIPE_RTR2) {
		log_warnx("connect request not from RTR");
		break;
	}
	imsg_compose(ibuf_se, imsg.hdr.type, imsg.hdr.peerid,
	    imsg.hdr.pid, -1, imsg.data,
	    imsg.hdr.len - IMSG_HEADER_SIZEsizeof(struct imsg_hdr));
	break;
default:
	break;
}
imsg_free(&imsg);
if (rv != 0)
	return (rv);
}
return (0);
1063}

1065void
1066send_nexthop_update(struct kroute_nexthop *msg)
1067{
char	*gw = NULL((void *)0);

if (msg->gateway.aid)
if (asprintf(&gw, ": via %s",
    log_addr(&msg->gateway)) == -1) {
	log_warn("send_nexthop_update");
	quit = 1;
}

log_debug("nexthop %s now %s%s%s", log_addr(&msg->nexthop),
   msg->valid ? "valid" : "invalid",
   msg->connected ? ": directly connected" : "",
   msg->gateway.aid ? gw : "");

free(gw);

if (imsg_compose(ibuf_rde, IMSG_NEXTHOP_UPDATE, 0, 0, -1,
   msg, sizeof(struct kroute_nexthop)) == -1)
quit = 1;
1087}

1089void
1090send_imsg_session(int type, pid_t pid, void *data, u_int16_t datalen)
1091{
imsg_compose(ibuf_se, type, 0, pid, -1, data, datalen);
1093}

1095int
1096send_network(int type, struct network_config *net, struct filter_set_head *h)
1097{
if (quit)
return (0);
if (imsg_compose(ibuf_rde, type, 0, 0, -1, net,
   sizeof(struct network_config)) == -1)
return (-1);
/* networks that get deleted don't need to send the filter set */
if (type == IMSG_NETWORK_REMOVE)
return (0);
if (send_filterset(ibuf_rde, h) == -1)
return (-1);
if (imsg_compose(ibuf_rde, IMSG_NETWORK_DONE, 0, 0, -1, NULL((void *)0), 0) == -1)
return (-1);

return (0);
1112}

1114int
1115bgpd_filternexthop(struct kroute *kr, struct kroute6 *kr6)
1116{
/* kernel routes are never filtered */
if (kr && kr->flags & F_KERNEL0x0002 && kr->prefixlen != 0)
return (0);
if (kr6 && kr6->flags & F_KERNEL0x0002 && kr6->prefixlen != 0)
return (0);

if (cflags & BGPD_FLAG_NEXTHOP_BGP0x0010) {
if (kr && kr->flags & F_BGPD_INSERTED0x0001)
	return (0);
if (kr6 && kr6->flags & F_BGPD_INSERTED0x0001)
	return (0);
}

if (cflags & BGPD_FLAG_NEXTHOP_DEFAULT0x0020) {
if (kr && kr->prefixlen == 0)
	return (0);
if (kr6 && kr6->prefixlen == 0)
	return (0);
}

return (1);
1138}

1140int
1141control_setup(struct bgpd_config *conf)
1142{
int fd, restricted;

/* control socket is outside chroot */
if (!cname || strcmp(cname, conf->csock)) {
if (cname) {
	free(cname);
}
if ((cname = strdup(conf->csock)) == NULL((void *)0))
	fatal("strdup");
if (control_check(cname) == -1)
	return (-1);
if ((fd = control_init(0, cname)) == -1)
	fatalx("control socket setup failed");
if (control_listen(fd) == -1)
	fatalx("control socket setup failed");
restricted = 0;
if (imsg_compose(ibuf_se, IMSG_RECONF_CTRL, 0, 0, fd,
    &restricted, sizeof(restricted)) == -1)
	return (-1);
}
if (!conf->rcsock) {
/* remove restricted socket */
free(rcname);
rcname = NULL((void *)0);
} else if (!rcname || strcmp(rcname, conf->rcsock)) {
if (rcname) {
	free(rcname);
}
if ((rcname = strdup(conf->rcsock)) == NULL((void *)0))
	fatal("strdup");
if (control_check(rcname) == -1)
	return (-1);
if ((fd = control_init(1, rcname)) == -1)
	fatalx("control socket setup failed");
if (control_listen(fd) == -1)
	fatalx("control socket setup failed");
restricted = 1;
if (imsg_compose(ibuf_se, IMSG_RECONF_CTRL, 0, 0, fd,
    &restricted, sizeof(restricted)) == -1)
	return (-1);
}
return (0);
1185}

1187void
1188set_pollfd(struct pollfd *pfd, struct imsgbuf *i)
1189{
if (i == NULL((void *)0) || i->fd == -1) {
pfd->fd = -1;
return;
}
pfd->fd = i->fd;
pfd->events = POLLIN0x0001;
if (i->w.queued > 0)
pfd->events |= POLLOUT0x0004;
1198}

1200int
1201handle_pollfd(struct pollfd *pfd, struct imsgbuf *i)
1202{
ssize_t n;

if (i == NULL((void *)0))
return (0);

if (pfd->revents & POLLOUT0x0004)
if (msgbuf_write(&i->w) <= 0 && errno(*__errno()) != EAGAIN35) {
	log_warn("imsg write error");
	close(i->fd);
	i->fd = -1;
	return (-1);
}

if (pfd->revents & POLLIN0x0001) {
if ((n = imsg_read(i)) == -1 && errno(*__errno()) != EAGAIN35) {
	log_warn("imsg read error");
	close(i->fd);
	i->fd = -1;
	return (-1);
}
if (n == 0) {
	log_warnx("peer closed imsg connection");
	close(i->fd);
	i->fd = -1;
	return (-1);
}
}
return (0);
1231}

1233static void
1234getsockpair(int pipe[2])
1235{
int bsize, i;

if (socketpair(AF_UNIX1, SOCK_STREAM1 | SOCK_CLOEXEC0x8000 | SOCK_NONBLOCK0x4000,
   PF_UNSPEC0, pipe) == -1)
fatal("socketpair");

for (i = 0; i < 2; i++) {
for (bsize = MAX_SOCK_BUF(4 * 65535); bsize >= 16 * 1024; bsize /= 2) {
	if (setsockopt(pipe[i], SOL_SOCKET0xffff, SO_RCVBUF0x1002,
	    &bsize, sizeof(bsize)) == -1) {
		if (errno(*__errno()) != ENOBUFS55)
			fatal("setsockopt(SO_RCVBUF, %d)",
			    bsize);
		log_warn("setsockopt(SO_RCVBUF, %d)", bsize);
		continue;
	}
	break;
}
}
for (i = 0; i < 2; i++) {
for (bsize = MAX_SOCK_BUF(4 * 65535); bsize >= 16 * 1024; bsize /= 2) {
	if (setsockopt(pipe[i], SOL_SOCKET0xffff, SO_SNDBUF0x1001,
	    &bsize, sizeof(bsize)) == -1) {
		if (errno(*__errno()) != ENOBUFS55)
			fatal("setsockopt(SO_SNDBUF, %d)",
			    bsize);
		log_warn("setsockopt(SO_SNDBUF, %d)", bsize);
		continue;
	}
	break;
}
}
1268}

1270int
1271imsg_send_sockets(struct imsgbuf *se, struct imsgbuf *rde, struct imsgbuf *roa)
1272{
int pipe_s2r[2];
int pipe_s2r_ctl[2];
int pipe_r2r[2];

getsockpair(pipe_s2r);
getsockpair(pipe_s2r_ctl);
getsockpair(pipe_r2r);

if (imsg_compose(se, IMSG_SOCKET_CONN, 0, 0, pipe_s2r[0],
   NULL((void *)0), 0) == -1)
return (-1);
if (imsg_compose(rde, IMSG_SOCKET_CONN, 0, 0, pipe_s2r[1],
   NULL((void *)0), 0) == -1)
return (-1);

if (imsg_compose(se, IMSG_SOCKET_CONN_CTL, 0, 0, pipe_s2r_ctl[0],
   NULL((void *)0), 0) == -1)
return (-1);
if (imsg_compose(rde, IMSG_SOCKET_CONN_CTL, 0, 0, pipe_s2r_ctl[1],
   NULL((void *)0), 0) == -1)
return (-1);

if (imsg_compose(roa, IMSG_SOCKET_CONN_RTR, 0, 0, pipe_r2r[0],
   NULL((void *)0), 0) == -1)
return (-1);
if (imsg_compose(rde, IMSG_SOCKET_CONN_RTR, 0, 0, pipe_r2r[1],
   NULL((void *)0), 0) == -1)
return (-1);

return (0);
1303}

1305void
1306bgpd_rtr_connect(struct rtr_config *r)
1307{
struct connect_elm *ce;
struct sockaddr *sa;
socklen_t len;

if (connect_cnt >= MAX_CONNECT_CNT32) {
log_warnx("rtr %s: too many concurrent connection requests",
    r->descr);
return;
}

if ((ce = calloc(1, sizeof(*ce))) == NULL((void *)0)) {
log_warn("rtr %s", r->descr);
return;
}

ce->id = r->id;
ce->fd = socket(aid2af(r->remote_addr.aid),
    SOCK_STREAM1 | SOCK_CLOEXEC0x8000 | SOCK_NONBLOCK0x4000, IPPROTO_TCP6);
if (ce->fd == -1) {
log_warn("rtr %s", r->descr);
free(ce);
return;
}

if ((sa = addr2sa(&r->local_addr, 0, &len)) != NULL((void *)0)) {
if (bind(ce->fd, sa, len) == -1) {
	log_warn("rtr %s: bind to %s", r->descr,
	    log_addr(&r->local_addr));
	close(ce->fd);
	free(ce);
	return;
}
}

sa = addr2sa(&r->remote_addr, r->remote_port, &len);
if (connect(ce->fd, sa, len) == -1) {
if (errno(*__errno()) != EINPROGRESS36) {
	log_warn("rtr %s: connect to %s:%u", r->descr,
	    log_addr(&r->remote_addr), r->remote_port);
	close(ce->fd);
	free(ce);
	return;
}
TAILQ_INSERT_TAIL(&connect_queue, ce, entry)do { (ce)->entry.tqe_next = ((void *)0); (ce)->entry.tqe_prev
 = (&connect_queue)->tqh_last; *(&connect_queue)->
tqh_last = (ce); (&connect_queue)->tqh_last = &(ce
)->entry.tqe_next; } while (0);
connect_cnt++;
return;
}

imsg_compose(ibuf_rtr, IMSG_SOCKET_CONN, ce->id, 0, ce->fd, NULL((void *)0), 0);
free(ce);
1358}

1360void
1361bgpd_rtr_connect_done(int fd, struct bgpd_config *conf)
1362{
struct rtr_config *r;
struct connect_elm *ce;
int error = 0;
socklen_t len;

TAILQ_FOREACH(ce, &connect_queue, entry)for((ce) = ((&connect_queue)->tqh_first); (ce) != ((void
 *)0); (ce) = ((ce)->entry.tqe_next)) {
if (ce->fd == fd)
	break;
}
if (ce == NULL((void *)0))
fatalx("connect entry not found");

TAILQ_REMOVE(&connect_queue, ce, entry)do { if (((ce)->entry.tqe_next) != ((void *)0)) (ce)->entry
.tqe_next->entry.tqe_prev = (ce)->entry.tqe_prev; else (
&connect_queue)->tqh_last = (ce)->entry.tqe_prev; *
(ce)->entry.tqe_prev = (ce)->entry.tqe_next; ; ; } while
 (0);
connect_cnt--;

SIMPLEQ_FOREACH(r, &conf->rtrs, entry)for((r) = ((&conf->rtrs)->sqh_first); (r) != ((void
 *)0); (r) = ((r)->entry.sqe_next)) {
if (ce->id == r->id)
	break;
}
if (r == NULL((void *)0)) {
log_warnx("rtr id %d no longer exists", ce->id);
goto fail;
}

len = sizeof(error);
if (getsockopt(fd, SOL_SOCKET0xffff, SO_ERROR0x1007, &error, &len) == -1) {
log_warn("rtr %s: getsockopt SO_ERROR", r->descr);
goto fail;
}

if (error != 0) {
errno(*__errno()) = error;
log_warn("rtr %s: connect to %s:%u", r->descr,
    log_addr(&r->remote_addr), r->remote_port);
goto fail;
}

imsg_compose(ibuf_rtr, IMSG_SOCKET_CONN, ce->id, 0, ce->fd, NULL((void *)0), 0);
free(ce);
return;

1404fail:
close(fd);
free(ce);
1407}