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-rwxr-xr-xchannels/chan_sip.c133
-rwxr-xr-xconfigs/sip.conf.sample4
2 files changed, 86 insertions, 51 deletions
diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index 3f8cf4f74..ce387bf87 100755
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -475,6 +475,10 @@ static int sip_reloading = 0;
#define REG_STATE_TIMEOUT 5
#define REG_STATE_NOAUTH 6
+#define SIP_NAT_NEVER 0
+#define SIP_NAT_RFC3581 1
+#define SIP_NAT_ALWAYS 2
+
/* sip_registry: Registrations with other SIP proxies */
struct sip_registry {
struct sockaddr_in addr; /* Who we connect to for registration purposes */
@@ -523,7 +527,7 @@ static struct ast_register_list {
static int __sip_do_register(struct sip_registry *r);
static int sipsock = -1;
-static int globalnat = 0;
+static int globalnat = SIP_NAT_RFC3581;
static int globalcanreinvite = REINVITE_INVITE;
@@ -569,7 +573,7 @@ static inline int sip_debug_test_pvt(struct sip_pvt *p)
{
if (sipdebug == 0)
return 0;
- return sip_debug_test_addr((p->nat ? &p->recv : &p->sa));
+ return sip_debug_test_addr(((p->nat == SIP_NAT_ALWAYS) ? &p->recv : &p->sa));
}
@@ -577,7 +581,7 @@ static inline int sip_debug_test_pvt(struct sip_pvt *p)
static int __sip_xmit(struct sip_pvt *p, char *data, int len)
{
int res;
- if (p->nat)
+ if (p->nat == SIP_NAT_ALWAYS)
res=sendto(sipsock, data, len, 0, (struct sockaddr *)&p->recv, sizeof(struct sockaddr_in));
else
res=sendto(sipsock, data, len, 0, (struct sockaddr *)&p->sa, sizeof(struct sockaddr_in));
@@ -655,7 +659,7 @@ static int retrans_pkt(void *data)
if (pkt->retrans < MAX_RETRANS) {
pkt->retrans++;
if (sip_debug_test_pvt(pkt->owner)) {
- if (pkt->owner->nat)
+ if (pkt->owner->nat == SIP_NAT_ALWAYS)
ast_verbose("Retransmitting #%d (NAT):\n%s\n to %s:%d\n", pkt->retrans, pkt->data, inet_ntoa(pkt->owner->recv.sin_addr), ntohs(pkt->owner->recv.sin_port));
else
ast_verbose("Retransmitting #%d (no NAT):\n%s\n to %s:%d\n", pkt->retrans, pkt->data, inet_ntoa(pkt->owner->sa.sin_addr), ntohs(pkt->owner->sa.sin_port));
@@ -834,7 +838,7 @@ static int send_response(struct sip_pvt *p, struct sip_request *req, int reliabl
{
int res;
if (sip_debug_test_pvt(p)) {
- if (p->nat)
+ if (p->nat == SIP_NAT_ALWAYS)
ast_verbose("%sTransmitting (NAT):\n%s\n to %s:%d\n", reliable ? "Reliably " : "", req->data, inet_ntoa(p->recv.sin_addr), ntohs(p->recv.sin_port));
else
ast_verbose("%sTransmitting (no NAT):\n%s\n to %s:%d\n", reliable ? "Reliably " : "", req->data, inet_ntoa(p->sa.sin_addr), ntohs(p->sa.sin_port));
@@ -856,7 +860,7 @@ static int send_request(struct sip_pvt *p, struct sip_request *req, int reliable
{
int res;
if (sip_debug_test_pvt(p)) {
- if (p->nat)
+ if (p->nat == SIP_NAT_ALWAYS)
ast_verbose("%sTransmitting:\n%s (NAT) to %s:%d\n", reliable ? "Reliably " : "", req->data, inet_ntoa(p->recv.sin_addr), ntohs(p->recv.sin_port));
else
ast_verbose("%sTransmitting:\n%s (no NAT) to %s:%d\n", reliable ? "Reliably " : "", req->data, inet_ntoa(p->sa.sin_addr), ntohs(p->sa.sin_port));
@@ -1208,12 +1212,12 @@ static int create_addr(struct sip_pvt *r, char *peer)
r->capability = p->capability;
r->nat = p->nat;
if (r->rtp) {
- ast_log(LOG_DEBUG, "Setting NAT on RTP to %d\n", r->nat);
- ast_rtp_setnat(r->rtp, r->nat);
+ ast_log(LOG_DEBUG, "Setting NAT on RTP to %d\n", (r->nat == SIP_NAT_ALWAYS));
+ ast_rtp_setnat(r->rtp, (r->nat == SIP_NAT_ALWAYS));
}
if (r->vrtp) {
- ast_log(LOG_DEBUG, "Setting NAT on VRTP to %d\n", r->nat);
- ast_rtp_setnat(r->vrtp, r->nat);
+ ast_log(LOG_DEBUG, "Setting NAT on VRTP to %d\n", (r->nat == SIP_NAT_ALWAYS));
+ ast_rtp_setnat(r->vrtp, (r->nat == SIP_NAT_ALWAYS));
}
strncpy(r->peername, p->username, sizeof(r->peername)-1);
strncpy(r->authname, p->username, sizeof(r->authname)-1);
@@ -2232,9 +2236,9 @@ static struct sip_pvt *sip_alloc(char *callid, struct sockaddr_in *sin, int useg
/* Setup NAT structure according to global settings if we have an address */
p->nat = globalnat;
memcpy(&p->recv, sin, sizeof(p->recv));
- ast_rtp_setnat(p->rtp, p->nat);
+ ast_rtp_setnat(p->rtp, (p->nat == SIP_NAT_ALWAYS));
if (p->vrtp)
- ast_rtp_setnat(p->vrtp, p->nat);
+ ast_rtp_setnat(p->vrtp, (p->nat == SIP_NAT_ALWAYS));
}
if (sin) {
@@ -2245,7 +2249,10 @@ static struct sip_pvt *sip_alloc(char *callid, struct sockaddr_in *sin, int useg
memcpy(&p->ourip, &__ourip, sizeof(p->ourip));
}
/* z9hG4bK is a magic cookie. See RFC 3261 section 8.1.1.7 */
- snprintf(p->via, sizeof(p->via), "SIP/2.0/UDP %s:%d;branch=z9hG4bK%08x", inet_ntoa(p->ourip), ourport, p->branch);
+ if (p->nat != SIP_NAT_NEVER)
+ snprintf(p->via, sizeof(p->via), "SIP/2.0/UDP %s:%d;branch=z9hG4bK%08x;rport", inet_ntoa(p->ourip), ourport, p->branch);
+ else
+ snprintf(p->via, sizeof(p->via), "SIP/2.0/UDP %s:%d;branch=z9hG4bK%08x", inet_ntoa(p->ourip), ourport, p->branch);
if (!callid)
build_callid(p->callid, sizeof(p->callid), p->ourip);
else
@@ -2831,19 +2838,10 @@ static int copy_via_headers(struct sip_pvt *p, struct sip_request *req, struct s
for (;;) {
tmp = __get_header(orig, field, &start);
if (!ast_strlen_zero(tmp)) {
- if (!copied && p->nat) {
+ if (!copied && (p->nat == SIP_NAT_ALWAYS)) {
/* Whoo hoo! Now we can indicate port address translation too! Just
another RFC (RFC3581). I'll leave the original comments in for
posterity. */
-#ifdef THE_SIP_AUTHORS_CAN_SUCK_MY_GONADS
- /* SLD: FIXME: Nice try, but the received= should not have a port */
- /* SLD: FIXME: See RFC2543 BNF in Section 6.40.5 */
- /* MAS: Yup, RFC says you can't do it. No way to indicate PAT...
- good job fellas. */
- if (ntohs(p->recv.sin_port) != DEFAULT_SIP_PORT)
- snprintf(new, sizeof(new), "%s;received=%s:%d", tmp, inet_ntoa(p->recv.sin_addr), ntohs(p->recv.sin_port));
- else
-#endif
snprintf(new, sizeof(new), "%s;received=%s;rport=%d", tmp, inet_ntoa(p->recv.sin_addr), ntohs(p->recv.sin_port));
add_header(req, field, new);
} else {
@@ -3045,7 +3043,10 @@ static int reqprep(struct sip_request *req, struct sip_pvt *p, char *msg, int se
if (newbranch) {
p->branch ^= rand();
- snprintf(p->via, sizeof(p->via), "SIP/2.0/UDP %s:%d;branch=z9hG4bK%08x;rport", inet_ntoa(p->ourip), ourport, p->branch);
+ if (p->nat != SIP_NAT_NEVER)
+ snprintf(p->via, sizeof(p->via), "SIP/2.0/UDP %s:%d;branch=z9hG4bK%08x;rport", inet_ntoa(p->ourip), ourport, p->branch);
+ else /* Some implementations (e.g. Uniden UIP200) can't handle rport being in the message!! */
+ snprintf(p->via, sizeof(p->via), "SIP/2.0/UDP %s:%d;branch=z9hG4bK%08x", inet_ntoa(p->ourip), ourport, p->branch);
}
if (!ast_strlen_zero(p->uri)) {
@@ -3628,7 +3629,10 @@ static int transmit_invite(struct sip_pvt *p, char *cmd, int sdp, char *auth, ch
if (init) {
/* Bump branch even on initial requests */
p->branch ^= rand();
- snprintf(p->via, sizeof(p->via), "SIP/2.0/UDP %s:%d;branch=z9hG4bK%08x;rport", inet_ntoa(p->ourip), ourport, p->branch);
+ if (p->nat != SIP_NAT_NEVER)
+ snprintf(p->via, sizeof(p->via), "SIP/2.0/UDP %s:%d;branch=z9hG4bK%08x;rport", inet_ntoa(p->ourip), ourport, p->branch);
+ else /* Work around buggy UNIDEN UIP200 firmware */
+ snprintf(p->via, sizeof(p->via), "SIP/2.0/UDP %s:%d;branch=z9hG4bK%08x", inet_ntoa(p->ourip), ourport, p->branch);
initreqprep(&req, p, cmd, vxml_url);
} else
reqprep(&req, p, cmd, 0, 1);
@@ -3933,7 +3937,10 @@ static int transmit_register(struct sip_registry *r, char *cmd, char *auth, char
p->ocseq = r->ocseq;
/* z9hG4bK is a magic cookie. See RFC 3261 section 8.1.1.7 */
- snprintf(via, sizeof(via), "SIP/2.0/UDP %s:%d;branch=z9hG4bK%08x;rport", inet_ntoa(p->ourip), ourport, p->branch);
+ if (p->nat != SIP_NAT_NEVER)
+ snprintf(via, sizeof(via), "SIP/2.0/UDP %s:%d;branch=z9hG4bK%08x;rport", inet_ntoa(p->ourip), ourport, p->branch);
+ else /* Work around buggy UNIDEN UIP200 firmware */
+ snprintf(via, sizeof(via), "SIP/2.0/UDP %s:%d;branch=z9hG4bK%08x", inet_ntoa(p->ourip), ourport, p->branch);
add_header(&req, "Via", via);
add_header(&req, "From", from);
add_header(&req, "To", to);
@@ -4177,7 +4184,7 @@ static int parse_contact(struct sip_pvt *pvt, struct sip_peer *p, struct sip_req
} else
port = DEFAULT_SIP_PORT;
memcpy(&oldsin, &p->addr, sizeof(oldsin));
- if (!p->nat) {
+ if (p->nat != SIP_NAT_ALWAYS) {
/* XXX This could block for a long time XXX */
hp = ast_gethostbyname(n, &ahp);
if (!hp) {
@@ -4925,9 +4932,9 @@ static int check_via(struct sip_pvt *p, struct sip_request *req)
p->sa.sin_port = htons(pt ? atoi(pt) : DEFAULT_SIP_PORT);
c = strstr(via, ";rport");
if (c && (c[6] != '='))
- p->nat = 1;
+ p->nat = SIP_NAT_ALWAYS;
if (sip_debug_test_pvt(p)) {
- if (p->nat)
+ if (p->nat == SIP_NAT_ALWAYS)
ast_verbose("Sending to %s : %d (NAT)\n", inet_ntoa(p->sa.sin_addr), ntohs(p->sa.sin_port));
else
ast_verbose("Sending to %s : %d (non-NAT)\n", inet_ntoa(p->sa.sin_addr), ntohs(p->sa.sin_port));
@@ -5068,12 +5075,12 @@ static int check_user_full(struct sip_pvt *p, struct sip_request *req, char *cmd
}
if (p->rtp) {
- ast_log(LOG_DEBUG, "Setting NAT on RTP to %d\n", p->nat);
- ast_rtp_setnat(p->rtp, p->nat);
+ ast_log(LOG_DEBUG, "Setting NAT on RTP to %d\n", (p->nat == SIP_NAT_ALWAYS));
+ ast_rtp_setnat(p->rtp, (p->nat == SIP_NAT_ALWAYS));
}
if (p->vrtp) {
- ast_log(LOG_DEBUG, "Setting NAT on VRTP to %d\n", p->nat);
- ast_rtp_setnat(p->vrtp, p->nat);
+ ast_log(LOG_DEBUG, "Setting NAT on VRTP to %d\n", (p->nat == SIP_NAT_ALWAYS));
+ ast_rtp_setnat(p->vrtp, (p->nat == SIP_NAT_ALWAYS));
}
if (!(res = check_auth(p, req, p->randdata, sizeof(p->randdata), user->name, user->secret, user->md5secret, cmd, uri, reliable, ignore))) {
sip_cancel_destroy(p);
@@ -5141,12 +5148,12 @@ static int check_user_full(struct sip_pvt *p, struct sip_request *req, char *cmd
p->ospauth = peer->ospauth;
#endif
if (p->rtp) {
- ast_log(LOG_DEBUG, "Setting NAT on RTP to %d\n", p->nat);
- ast_rtp_setnat(p->rtp, p->nat);
+ ast_log(LOG_DEBUG, "Setting NAT on RTP to %d\n", (p->nat == SIP_NAT_ALWAYS));
+ ast_rtp_setnat(p->rtp, (p->nat == SIP_NAT_ALWAYS));
}
if (p->vrtp) {
- ast_log(LOG_DEBUG, "Setting NAT on VRTP to %d\n", p->nat);
- ast_rtp_setnat(p->vrtp, p->nat);
+ ast_log(LOG_DEBUG, "Setting NAT on VRTP to %d\n", (p->nat == SIP_NAT_ALWAYS));
+ ast_rtp_setnat(p->vrtp, (p->nat == SIP_NAT_ALWAYS));
}
strcpy(p->peersecret, peer->secret);
strcpy(p->peermd5secret, peer->md5secret);
@@ -5294,7 +5301,7 @@ static int sip_show_users(int fd, int argc, char *argv[])
user->accountcode,
user->context,
user->ha ? "Yes" : "No",
- user->nat ? "Yes" : "No");
+ user->nat ? ((user->nat == SIP_NAT_ALWAYS) ? "Yes" : "RFC3581" ): "No");
}
ast_mutex_unlock(&userl.lock);
return RESULT_SUCCESS;
@@ -5336,7 +5343,7 @@ static int sip_show_peers(int fd, int argc, char *argv[])
sprintf(srch, FORMAT, name,
peer->addr.sin_addr.s_addr ? inet_ntoa(peer->addr.sin_addr) : "(Unspecified)",
peer->dynamic ? " D " : " ", /* Dynamic or not? */
- peer->nat ? " N " : " ", /* NAT=yes? */
+ (peer->nat == SIP_NAT_ALWAYS) ? " N " : " ", /* NAT=yes? */
peer->ha ? " A " : " ", /* permit/deny */
nm,
ntohs(peer->addr.sin_port), status);
@@ -5357,7 +5364,7 @@ static int sip_show_peers(int fd, int argc, char *argv[])
ast_cli(fd, FORMAT, name,
peer->addr.sin_addr.s_addr ? inet_ntoa(peer->addr.sin_addr) : "(Unspecified)",
peer->dynamic ? " D " : " ", /* Dynamic or not? */
- peer->nat ? " N " : " ", /* NAT=yes? */
+ (peer->nat == SIP_NAT_ALWAYS) ? " N " : " ", /* NAT=yes? */
peer->ha ? " A " : " ", /* permit/deny */
nm,
ntohs(peer->addr.sin_port), status);
@@ -5439,7 +5446,7 @@ static int sip_show_peer(int fd, int argc, char *argv[])
ast_cli(fd, " Expire : %d\n", peer->expire);
ast_cli(fd, " Expiry : %d\n", peer->expiry);
ast_cli(fd, " Insecure : %s\n", (peer->insecure?((peer->insecure == 2)?"Very":"Yes"):"No") );
- ast_cli(fd, " Nat : %s\n", (peer->nat?"Yes":"No"));
+ ast_cli(fd, " Nat : %s\n", (peer->nat?((peer->nat == SIP_NAT_ALWAYS) ? "Yes" : "RFC3581"):"No"));
ast_cli(fd, " ACL : %s\n", (peer->ha?"Yes":"No"));
ast_cli(fd, " CanReinvite : %s\n", (peer->canreinvite?"Yes":"No"));
ast_cli(fd, " PromiscRedir : %s\n", (peer->promiscredir?"Yes":"No"));
@@ -5639,7 +5646,7 @@ static int sip_show_channel(int fd, int argc, char *argv[])
ast_cli(fd, " Format %s\n", ast_getformatname(cur->owner ? cur->owner->nativeformats : 0) );
ast_cli(fd, " Theoretical Address: %s:%d\n", inet_ntoa(cur->sa.sin_addr), ntohs(cur->sa.sin_port));
ast_cli(fd, " Received Address: %s:%d\n", inet_ntoa(cur->recv.sin_addr), ntohs(cur->recv.sin_port));
- ast_cli(fd, " NAT Support: %s\n", cur->nat ? "Yes" : "No");
+ ast_cli(fd, " NAT Support: %s\n", cur->nat ? ((cur->nat == SIP_NAT_ALWAYS) ? "Yes" : "RFC3581"): "No");
ast_cli(fd, " Our Tag: %08d\n", cur->tag);
ast_cli(fd, " Their Tag: %s\n", cur->theirtag);
ast_cli(fd, " SIP User agent: %s\n", cur->useragent);
@@ -7208,7 +7215,10 @@ static int sip_send_mwi_to_peer(struct sip_peer *peer)
if (ast_sip_ouraddrfor(&p->sa.sin_addr,&p->ourip))
memcpy(&p->ourip, &__ourip, sizeof(p->ourip));
/* z9hG4bK is a magic cookie. See RFC 3261 section 8.1.1.7 */
- snprintf(p->via, sizeof(p->via), "SIP/2.0/UDP %s:%d;branch=z9hG4bK%08x;rport", inet_ntoa(p->ourip), ourport, p->branch);
+ if (p->nat != SIP_NAT_NEVER)
+ snprintf(p->via, sizeof(p->via), "SIP/2.0/UDP %s:%d;branch=z9hG4bK%08x;rport", inet_ntoa(p->ourip), ourport, p->branch);
+ else /* UNIDEN UIP200 bug */
+ snprintf(p->via, sizeof(p->via), "SIP/2.0/UDP %s:%d;branch=z9hG4bK%08x", inet_ntoa(p->ourip), ourport, p->branch);
build_callid(p->callid, sizeof(p->callid), p->ourip);
/* Send MWI */
p->outgoing = 1;
@@ -7420,7 +7430,10 @@ static int sip_poke_peer(struct sip_peer *peer)
if (ast_sip_ouraddrfor(&p->sa.sin_addr,&p->ourip))
memcpy(&p->ourip, &__ourip, sizeof(p->ourip));
/* z9hG4bK is a magic cookie. See RFC 3261 section 8.1.1.7 */
- snprintf(p->via, sizeof(p->via), "SIP/2.0/UDP %s:%d;branch=z9hG4bK%08x", inet_ntoa(p->ourip), ourport, p->branch);
+ if (p->nat != SIP_NAT_NEVER)
+ snprintf(p->via, sizeof(p->via), "SIP/2.0/UDP %s:%d;branch=z9hG4bK%08x;rport", inet_ntoa(p->ourip), ourport, p->branch);
+ else
+ snprintf(p->via, sizeof(p->via), "SIP/2.0/UDP %s:%d;branch=z9hG4bK%08x", inet_ntoa(p->ourip), ourport, p->branch);
build_callid(p->callid, sizeof(p->callid), p->ourip);
if (peer->pokeexpire > -1)
@@ -7538,7 +7551,10 @@ static struct ast_channel *sip_request(char *type, int format, void *data)
if (ast_sip_ouraddrfor(&p->sa.sin_addr,&p->ourip))
memcpy(&p->ourip, &__ourip, sizeof(p->ourip));
/* z9hG4bK is a magic cookie. See RFC 3261 section 8.1.1.7 */
- snprintf(p->via, sizeof(p->via), "SIP/2.0/UDP %s:%d;branch=z9hG4bK%08x", inet_ntoa(p->ourip), ourport, p->branch);
+ if (p->nat != SIP_NAT_NEVER)
+ snprintf(p->via, sizeof(p->via), "SIP/2.0/UDP %s:%d;branch=z9hG4bK%08x;rport", inet_ntoa(p->ourip), ourport, p->branch);
+ else /* UNIDEN bug */
+ snprintf(p->via, sizeof(p->via), "SIP/2.0/UDP %s:%d;branch=z9hG4bK%08x", inet_ntoa(p->ourip), ourport, p->branch);
build_callid(p->callid, sizeof(p->callid), p->ourip);
if (ext)
strncpy(p->username, ext, sizeof(p->username) - 1);
@@ -7612,7 +7628,12 @@ static struct sip_user *build_user(char *name, struct ast_variable *v)
else
user->canreinvite = ast_true(v->value);
} else if (!strcasecmp(v->name, "nat")) {
- user->nat = ast_true(v->value);
+ if (!strcasecmp(v->value, "never"))
+ user->nat = SIP_NAT_NEVER;
+ else if (ast_true(v->value))
+ user->nat = SIP_NAT_ALWAYS;
+ else
+ user->nat = SIP_NAT_RFC3581;
} else if (!strcasecmp(v->name, "callerid")) {
strncpy(user->callerid, v->value, sizeof(user->callerid)-1);
user->hascallerid=1;
@@ -7787,9 +7808,14 @@ static struct sip_peer *build_peer(char *name, struct ast_variable *v)
peer->canreinvite = REINVITE_UPDATE;
else
peer->canreinvite = ast_true(v->value);
- } else if (!strcasecmp(v->name, "nat"))
- peer->nat = ast_true(v->value);
- else if (!strcasecmp(v->name, "context"))
+ } else if (!strcasecmp(v->name, "nat")) {
+ if (!strcasecmp(v->value, "rfc3581"))
+ peer->nat = SIP_NAT_RFC3581;
+ else if (ast_true(v->value))
+ peer->nat = SIP_NAT_ALWAYS;
+ else
+ peer->nat = SIP_NAT_NEVER;
+ } else if (!strcasecmp(v->name, "context"))
strncpy(peer->context, v->value, sizeof(peer->context)-1);
else if (!strcasecmp(v->name, "fromdomain"))
strncpy(peer->fromdomain, v->value, sizeof(peer->fromdomain)-1);
@@ -7959,7 +7985,7 @@ static int reload_config(void)
return 0;
}
- globalnat = 0;
+ globalnat = SIP_NAT_RFC3581;
sip_prefs_free();
@@ -8026,7 +8052,12 @@ static int reload_config(void)
} else if (!strcasecmp(v->name, "fromdomain")) {
strncpy(fromdomain, v->value, sizeof(fromdomain)-1);
} else if (!strcasecmp(v->name, "nat")) {
- globalnat = ast_true(v->value);
+ if (!strcasecmp(v->value, "rfc3581"))
+ globalnat = SIP_NAT_RFC3581;
+ else if (ast_true(v->value))
+ globalnat = SIP_NAT_ALWAYS;
+ else
+ globalnat = SIP_NAT_NEVER;
} else if (!strcasecmp(v->name, "autocreatepeer")) {
autocreatepeer = ast_true(v->value);
} else if (!strcasecmp(v->name, "srvlookup")) {
diff --git a/configs/sip.conf.sample b/configs/sip.conf.sample
index 73a601ead..69f11cf7f 100755
--- a/configs/sip.conf.sample
+++ b/configs/sip.conf.sample
@@ -60,6 +60,10 @@ srvlookup=yes ; Enable DNS SRV lookups on outbound calls
;trustrpid = no ; If Remote-Party-ID should be trusted
;progressinband=no ; If we should generate in-band ringing always
;useragent=Asterisk PBX ; Allows you to change the user agent string
+;nat=no ; NAT settings
+ ; yes = Always ignore info and assume NAT
+ ; no = Use NAT mode only according to RFC3581
+ ; never = Never attempt NAT mode or RFC3581 support
;promiscredir = no ; If yes, allows 302 or REDIR to non-local SIP address
; Asterisk can register as a SIP user agent to a SIP proxy (provider)
; Format for the register statement is:
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-20 02:34:12 +0000