As preparation for supporting multiple addresses per interface, we
replace the single addr/prefix_len fields with arrays.
- We add an ip4_addr_entry and an ip6_addr_entry struct containing
address and prefix length.
- We set the array sizes to IP4_MAX_ADDRS=8 and IP6_MAX_ADDRS=16,
respectively.
The only functional change is that the IPv6 prefix length now is
properly stored instead of being hardcoded to 64 even when set
via the -a option.
Signed-off-by: Jon Maloy
---
arp.c | 4 +--
conf.c | 97 +++++++++++++++++++++++++++++++++-----------------------
dhcp.c | 8 ++---
dhcpv6.c | 6 ++--
fwd.c | 12 +++----
ip.h | 26 +++++++++++++++
ndp.c | 6 ++--
passt.h | 16 ++++++----
pasta.c | 12 ++++---
tap.c | 4 +--
util.h | 1 +
11 files changed, 122 insertions(+), 70 deletions(-)
diff --git a/arp.c b/arp.c
index bb042e9..7eaf517 100644
--- a/arp.c
+++ b/arp.c
@@ -54,7 +54,7 @@ static bool ignore_arp(const struct ctx *c,
return true;
/* Don't resolve the guest's assigned address, either. */
- if (!memcmp(am->tip, &c->ip4.addr, sizeof(am->tip)))
+ if (!memcmp(am->tip, &c->ip4.addrs[0].addr, sizeof(am->tip)))
return true;
return false;
@@ -145,7 +145,7 @@ void arp_send_init_req(const struct ctx *c)
memcpy(req.am.sha, c->our_tap_mac, sizeof(req.am.sha));
memcpy(req.am.sip, &c->ip4.our_tap_addr, sizeof(req.am.sip));
memcpy(req.am.tha, MAC_BROADCAST, sizeof(req.am.tha));
- memcpy(req.am.tip, &c->ip4.addr, sizeof(req.am.tip));
+ memcpy(req.am.tip, &c->ip4.addrs[0].addr, sizeof(req.am.tip));
debug("Sending initial ARP request for guest MAC address");
tap_send_single(c, &req, sizeof(req));
diff --git a/conf.c b/conf.c
index fdc19e8..0e96f36 100644
--- a/conf.c
+++ b/conf.c
@@ -694,10 +694,12 @@ static int conf_ip4_prefix(const char *arg)
* conf_ip4() - Verify or detect IPv4 support, get relevant addresses
* @ifi: Host interface to attempt (0 to determine one)
* @ip4: IPv4 context (will be written)
+ * @permanent: Mark configured addresses as permanent
*
* Return: interface index for IPv4, or 0 on failure.
*/
-static unsigned int conf_ip4(unsigned int ifi, struct ip4_ctx *ip4)
+static unsigned int conf_ip4(unsigned int ifi, struct ip4_ctx *ip4,
+ bool permanent)
{
if (!ifi)
ifi = nl_get_ext_if(nl_sock, AF_INET);
@@ -717,33 +719,38 @@ static unsigned int conf_ip4(unsigned int ifi, struct ip4_ctx *ip4)
}
}
- if (IN4_IS_ADDR_UNSPECIFIED(&ip4->addr)) {
+ if (!ip4->addr_count) {
int rc = nl_addr_get(nl_sock, ifi, AF_INET,
- &ip4->addr, &ip4->prefix_len, NULL);
+ &ip4->addrs[0].addr,
+ &ip4->addrs[0].prefix_len, NULL);
if (rc < 0) {
debug("Couldn't discover IPv4 address: %s",
strerror_(-rc));
return 0;
}
+ ip4->addrs[0].permanent = permanent;
+ ip4->addr_count = 1;
}
- if (!ip4->prefix_len) {
- in_addr_t addr = ntohl(ip4->addr.s_addr);
- if (IN_CLASSA(addr))
- ip4->prefix_len = (32 - IN_CLASSA_NSHIFT);
- else if (IN_CLASSB(addr))
- ip4->prefix_len = (32 - IN_CLASSB_NSHIFT);
- else if (IN_CLASSC(addr))
- ip4->prefix_len = (32 - IN_CLASSC_NSHIFT);
+ /* Apply default prefix_len to first address if not set */
+ if (!ip4->addrs[0].prefix_len) {
+ in_addr_t a = ntohl(ip4->addrs[0].addr.s_addr);
+
+ if (IN_CLASSA(a))
+ ip4->addrs[0].prefix_len = 8;
+ else if (IN_CLASSB(a))
+ ip4->addrs[0].prefix_len = 16;
+ else if (IN_CLASSC(a))
+ ip4->addrs[0].prefix_len = 24;
else
- ip4->prefix_len = 32;
+ ip4->addrs[0].prefix_len = 32;
}
- ip4->addr_seen = ip4->addr;
+ ip4->addr_seen = ip4->addrs[0].addr;
ip4->our_tap_addr = ip4->guest_gw;
- if (IN4_IS_ADDR_UNSPECIFIED(&ip4->addr))
+ if (IN4_IS_ADDR_UNSPECIFIED(&ip4->addrs[0].addr))
return 0;
return ifi;
@@ -755,9 +762,9 @@ static unsigned int conf_ip4(unsigned int ifi, struct ip4_ctx *ip4)
*/
static void conf_ip4_local(struct ip4_ctx *ip4)
{
- ip4->addr_seen = ip4->addr = IP4_LL_GUEST_ADDR;
+ ip4->addr_seen = ip4->addrs[0].addr = IP4_LL_GUEST_ADDR;
ip4->our_tap_addr = ip4->guest_gw = IP4_LL_GUEST_GW;
- ip4->prefix_len = IP4_LL_PREFIX_LEN;
+ ip4->addrs[0].prefix_len = IP4_LL_PREFIX_LEN;
ip4->no_copy_addrs = ip4->no_copy_routes = true;
}
@@ -766,10 +773,12 @@ static void conf_ip4_local(struct ip4_ctx *ip4)
* conf_ip6() - Verify or detect IPv6 support, get relevant addresses
* @ifi: Host interface to attempt (0 to determine one)
* @ip6: IPv6 context (will be written)
+ * @permanent: Mark discovered addresses as permanent
*
* Return: interface index for IPv6, or 0 on failure.
*/
-static unsigned int conf_ip6(unsigned int ifi, struct ip6_ctx *ip6)
+static unsigned int conf_ip6(unsigned int ifi, struct ip6_ctx *ip6,
+ bool permanent)
{
int prefix_len = 0;
int rc;
@@ -792,19 +801,25 @@ static unsigned int conf_ip6(unsigned int ifi, struct ip6_ctx *ip6)
}
rc = nl_addr_get(nl_sock, ifi, AF_INET6,
- IN6_IS_ADDR_UNSPECIFIED(&ip6->addr) ? &ip6->addr : NULL,
+ ip6->addr_count ? NULL : &ip6->addrs[0].addr,
&prefix_len, &ip6->our_tap_ll);
if (rc < 0) {
debug("Couldn't discover IPv6 address: %s", strerror_(-rc));
return 0;
}
- ip6->addr_seen = ip6->addr;
+ if (!ip6->addr_count) {
+ ip6->addrs[0].prefix_len = prefix_len ? prefix_len : 64;
+ ip6->addrs[0].permanent = permanent;
+ ip6->addr_count = 1;
+ }
+
+ ip6->addr_seen = ip6->addrs[0].addr;
if (IN6_IS_ADDR_LINKLOCAL(&ip6->guest_gw))
ip6->our_tap_ll = ip6->guest_gw;
- if (IN6_IS_ADDR_UNSPECIFIED(&ip6->addr) ||
+ if (IN6_IS_ADDR_UNSPECIFIED(&ip6->addrs[0].addr) ||
IN6_IS_ADDR_UNSPECIFIED(&ip6->our_tap_ll))
return 0;
@@ -1149,11 +1164,13 @@ static void conf_print(const struct ctx *c)
if (!c->no_dhcp) {
uint32_t mask;
- mask = htonl(0xffffffff << (32 - c->ip4.prefix_len));
+ mask = htonl(0xffffffff <<
+ (32 - c->ip4.addrs[0].prefix_len));
info("DHCP:");
info(" assign: %s",
- inet_ntop(AF_INET, &c->ip4.addr, buf4, sizeof(buf4)));
+ inet_ntop(AF_INET, &c->ip4.addrs[0].addr,
+ buf4, sizeof(buf4)));
info(" mask: %s",
inet_ntop(AF_INET, &mask, buf4, sizeof(buf4)));
info(" router: %s",
@@ -1191,7 +1208,8 @@ static void conf_print(const struct ctx *c)
goto dns6;
info(" assign: %s",
- inet_ntop(AF_INET6, &c->ip6.addr, buf6, sizeof(buf6)));
+ inet_ntop(AF_INET6, &c->ip6.addrs[0].addr,
+ buf6, sizeof(buf6)));
info(" router: %s",
inet_ntop(AF_INET6, &c->ip6.guest_gw, buf6, sizeof(buf6)));
info(" our link-local: %s",
@@ -1812,22 +1830,23 @@ void conf(struct ctx *c, int argc, char **argv)
break;
}
case 'a':
- if (inet_pton(AF_INET6, optarg, &c->ip6.addr) &&
- !IN6_IS_ADDR_UNSPECIFIED(&c->ip6.addr) &&
- !IN6_IS_ADDR_LOOPBACK(&c->ip6.addr) &&
- !IN6_IS_ADDR_V4MAPPED(&c->ip6.addr) &&
- !IN6_IS_ADDR_V4COMPAT(&c->ip6.addr) &&
- !IN6_IS_ADDR_MULTICAST(&c->ip6.addr)) {
+ if (inet_pton(AF_INET6, optarg,
+ &c->ip6.addrs[0].addr) &&
+ !IN6_IS_ADDR_UNSPECIFIED(&c->ip6.addrs[0].addr) &&
+ !IN6_IS_ADDR_LOOPBACK(&c->ip6.addrs[0].addr) &&
+ !IN6_IS_ADDR_V4MAPPED(&c->ip6.addrs[0].addr) &&
+ !IN6_IS_ADDR_V4COMPAT(&c->ip6.addrs[0].addr) &&
+ !IN6_IS_ADDR_MULTICAST(&c->ip6.addrs[0].addr)) {
if (c->mode == MODE_PASTA)
c->ip6.no_copy_addrs = true;
break;
}
- if (inet_pton(AF_INET, optarg, &c->ip4.addr) &&
- !IN4_IS_ADDR_UNSPECIFIED(&c->ip4.addr) &&
- !IN4_IS_ADDR_BROADCAST(&c->ip4.addr) &&
- !IN4_IS_ADDR_LOOPBACK(&c->ip4.addr) &&
- !IN4_IS_ADDR_MULTICAST(&c->ip4.addr)) {
+ if (inet_pton(AF_INET, optarg, &c->ip4.addrs[0].addr) &&
+ !IN4_IS_ADDR_UNSPECIFIED(&c->ip4.addrs[0].addr) &&
+ !IN4_IS_ADDR_BROADCAST(&c->ip4.addrs[0].addr) &&
+ !IN4_IS_ADDR_LOOPBACK(&c->ip4.addrs[0].addr) &&
+ !IN4_IS_ADDR_MULTICAST(&c->ip4.addrs[0].addr)) {
if (c->mode == MODE_PASTA)
c->ip4.no_copy_addrs = true;
break;
@@ -1836,8 +1855,8 @@ void conf(struct ctx *c, int argc, char **argv)
die("Invalid address: %s", optarg);
break;
case 'n':
- c->ip4.prefix_len = conf_ip4_prefix(optarg);
- if (c->ip4.prefix_len < 0)
+ c->ip4.addrs[0].prefix_len = conf_ip4_prefix(optarg);
+ if (c->ip4.addrs[0].prefix_len < 0)
die("Invalid netmask: %s", optarg);
break;
@@ -1984,9 +2003,9 @@ void conf(struct ctx *c, int argc, char **argv)
nl_sock_init(c, false);
if (!v6_only)
- c->ifi4 = conf_ip4(ifi4, &c->ip4);
+ c->ifi4 = conf_ip4(ifi4, &c->ip4, c->pasta_conf_ns);
if (!v4_only)
- c->ifi6 = conf_ip6(ifi6, &c->ip6);
+ c->ifi6 = conf_ip6(ifi6, &c->ip6, c->pasta_conf_ns);
if (c->ifi4 && c->mtu < IPV4_MIN_MTU) {
warn("MTU %"PRIu16" is too small for IPv4 (minimum %u)",
@@ -2125,7 +2144,7 @@ void conf(struct ctx *c, int argc, char **argv)
if (!c->ifi6) {
c->no_ndp = 1;
c->no_dhcpv6 = 1;
- } else if (IN6_IS_ADDR_UNSPECIFIED(&c->ip6.addr)) {
+ } else if (IN6_IS_ADDR_UNSPECIFIED(&c->ip6.addrs[0].addr)) {
c->no_dhcpv6 = 1;
}
diff --git a/dhcp.c b/dhcp.c
index 6b9c2e3..46ef8e3 100644
--- a/dhcp.c
+++ b/dhcp.c
@@ -352,7 +352,7 @@ int dhcp(const struct ctx *c, struct iov_tail *data)
reply.secs = 0;
reply.flags = m->flags;
reply.ciaddr = m->ciaddr;
- reply.yiaddr = c->ip4.addr;
+ reply.yiaddr = c->ip4.addrs[0].addr;
reply.siaddr = 0;
reply.giaddr = m->giaddr;
memcpy(&reply.chaddr, m->chaddr, sizeof(reply.chaddr));
@@ -404,7 +404,7 @@ int dhcp(const struct ctx *c, struct iov_tail *data)
info(" from %s", eth_ntop(m->chaddr, macstr, sizeof(macstr)));
- mask.s_addr = htonl(0xffffffff << (32 - c->ip4.prefix_len));
+ mask.s_addr = htonl(0xffffffff << (32 - c->ip4.addrs[0].prefix_len));
memcpy(opts[1].s, &mask, sizeof(mask));
memcpy(opts[3].s, &c->ip4.guest_gw, sizeof(c->ip4.guest_gw));
memcpy(opts[54].s, &c->ip4.our_tap_addr, sizeof(c->ip4.our_tap_addr));
@@ -412,7 +412,7 @@ int dhcp(const struct ctx *c, struct iov_tail *data)
/* If the gateway is not on the assigned subnet, send an option 121
* (Classless Static Routing) adding a dummy route to it.
*/
- if ((c->ip4.addr.s_addr & mask.s_addr)
+ if ((c->ip4.addrs[0].addr.s_addr & mask.s_addr)
!= (c->ip4.guest_gw.s_addr & mask.s_addr)) {
/* a.b.c.d/32:0.0.0.0, 0:a.b.c.d */
opts[121].slen = 14;
@@ -469,7 +469,7 @@ int dhcp(const struct ctx *c, struct iov_tail *data)
if (m->flags & FLAG_BROADCAST)
dst = in4addr_broadcast;
else
- dst = c->ip4.addr;
+ dst = c->ip4.addrs[0].addr;
tap_udp4_send(c, c->ip4.our_tap_addr, 67, dst, 68, &reply, dlen);
diff --git a/dhcpv6.c b/dhcpv6.c
index e4df0db..7eae6a1 100644
--- a/dhcpv6.c
+++ b/dhcpv6.c
@@ -625,7 +625,7 @@ int dhcpv6(struct ctx *c, struct iov_tail *data,
if (mh->type == TYPE_CONFIRM && server_id)
return -1;
- if (dhcpv6_ia_notonlink(data, &c->ip6.addr)) {
+ if (dhcpv6_ia_notonlink(data, &c->ip6.addrs[0].addr)) {
dhcpv6_send_ia_notonlink(c, data, &client_id_base,
ntohs(client_id->l), mh->xid);
@@ -679,7 +679,7 @@ int dhcpv6(struct ctx *c, struct iov_tail *data,
tap_udp6_send(c, src, 547, tap_ip6_daddr(c, src), 546,
mh->xid, &resp, n);
- c->ip6.addr_seen = c->ip6.addr;
+ c->ip6.addr_seen = c->ip6.addrs[0].addr;
return 1;
}
@@ -703,5 +703,5 @@ void dhcpv6_init(const struct ctx *c)
memcpy(resp_not_on_link.server_id.duid_lladdr,
c->our_tap_mac, sizeof(c->our_tap_mac));
- resp.ia_addr.addr = c->ip6.addr;
+ resp.ia_addr.addr = c->ip6.addrs[0].addr;
}
diff --git a/fwd.c b/fwd.c
index 44a0e10..408af30 100644
--- a/fwd.c
+++ b/fwd.c
@@ -516,7 +516,7 @@ static bool fwd_guest_accessible4(const struct ctx *c,
/* For IPv4, addr_seen is initialised to addr, so is always a valid
* address
*/
- if (IN4_ARE_ADDR_EQUAL(addr, &c->ip4.addr) ||
+ if (IN4_ARE_ADDR_EQUAL(addr, &c->ip4.addrs[0].addr) ||
IN4_ARE_ADDR_EQUAL(addr, &c->ip4.addr_seen))
return false;
@@ -537,7 +537,7 @@ static bool fwd_guest_accessible6(const struct ctx *c,
if (IN6_IS_ADDR_LOOPBACK(addr))
return false;
- if (IN6_ARE_ADDR_EQUAL(addr, &c->ip6.addr))
+ if (IN6_ARE_ADDR_EQUAL(addr, &c->ip6.addrs[0].addr))
return false;
/* For IPv6, addr_seen starts unspecified, because we don't know what LL
@@ -587,9 +587,9 @@ static void nat_outbound(const struct ctx *c, const union inany_addr *addr,
else if (inany_equals6(addr, &c->ip6.map_host_loopback))
*translated = inany_loopback6;
else if (inany_equals4(addr, &c->ip4.map_guest_addr))
- *translated = inany_from_v4(c->ip4.addr);
+ *translated = inany_from_v4(c->ip4.addrs[0].addr);
else if (inany_equals6(addr, &c->ip6.map_guest_addr))
- translated->a6 = c->ip6.addr;
+ translated->a6 = c->ip6.addrs[0].addr;
else
*translated = *addr;
}
@@ -710,10 +710,10 @@ bool nat_inbound(const struct ctx *c, const union inany_addr *addr,
inany_equals6(addr, &in6addr_loopback)) {
translated->a6 = c->ip6.map_host_loopback;
} else if (!IN4_IS_ADDR_UNSPECIFIED(&c->ip4.map_guest_addr) &&
- inany_equals4(addr, &c->ip4.addr)) {
+ inany_equals4(addr, &c->ip4.addrs[0].addr)) {
*translated = inany_from_v4(c->ip4.map_guest_addr);
} else if (!IN6_IS_ADDR_UNSPECIFIED(&c->ip6.map_guest_addr) &&
- inany_equals6(addr, &c->ip6.addr)) {
+ inany_equals6(addr, &c->ip6.addrs[0].addr)) {
translated->a6 = c->ip6.map_guest_addr;
} else if (fwd_guest_accessible(c, addr)) {
*translated = *addr;
diff --git a/ip.h b/ip.h
index 5830b92..748cb1f 100644
--- a/ip.h
+++ b/ip.h
@@ -135,4 +135,30 @@ static const struct in_addr in4addr_broadcast = { 0xffffffff };
#define IPV6_MIN_MTU 1280
#endif
+/* Maximum number of addresses per address family */
+#define IP4_MAX_ADDRS 8
+#define IP6_MAX_ADDRS 16
+
+/**
+ * struct ip4_addr_entry - IPv4 address with prefix length
+ * @addr: IPv4 address
+ * @prefix_len: Prefix length (netmask bits)
+ */
+struct ip4_addr_entry {
+ struct in_addr addr;
+ int prefix_len;
+ int permanent;
+};
+
+/**
+ * struct ip6_addr_entry - IPv6 address with prefix length
+ * @addr: IPv6 address
+ * @prefix_len: Prefix length
+ */
+struct ip6_addr_entry {
+ struct in6_addr addr;
+ int prefix_len;
+ int permanent;
+};
+
#endif /* IP_H */
diff --git a/ndp.c b/ndp.c
index eb9e313..868a234 100644
--- a/ndp.c
+++ b/ndp.c
@@ -257,7 +257,7 @@ static void ndp_ra(const struct ctx *c, const struct in6_addr *dst)
.valid_lifetime = ~0U,
.pref_lifetime = ~0U,
},
- .prefix = c->ip6.addr,
+ .prefix = c->ip6.addrs[0].addr,
.source_ll = {
.header = {
.type = OPT_SRC_L2_ADDR,
@@ -466,8 +466,8 @@ void ndp_send_init_req(const struct ctx *c)
.icmp6_solicited = 0, /* Reserved */
.icmp6_override = 0, /* Reserved */
},
- .target_addr = c->ip6.addr
+ .target_addr = c->ip6.addrs[0].addr
};
debug("Sending initial NDP NS request for guest MAC address");
- ndp_send(c, &c->ip6.addr, &ns, sizeof(ns));
+ ndp_send(c, &c->ip6.addrs[0].addr, &ns, sizeof(ns));
}
diff --git a/passt.h b/passt.h
index 79d01dd..533f2cb 100644
--- a/passt.h
+++ b/passt.h
@@ -66,9 +66,9 @@ enum passt_modes {
/**
* struct ip4_ctx - IPv4 execution context
- * @addr: IPv4 address assigned to guest
+ * @addrs: IPv4 addresses assigned to guest
+ * @addr_count: Number of addresses in addrs[] array
* @addr_seen: Latest IPv4 address seen as source from tap
- * @prefixlen: IPv4 prefix length (netmask)
* @guest_gw: IPv4 gateway as seen by the guest
* @map_host_loopback: Outbound connections to this address are NATted to the
* host's 127.0.0.1
@@ -85,9 +85,10 @@ enum passt_modes {
*/
struct ip4_ctx {
/* PIF_TAP addresses */
- struct in_addr addr;
+ struct ip4_addr_entry addrs[IP4_MAX_ADDRS];
+ int addr_count;
+
struct in_addr addr_seen;
- int prefix_len;
struct in_addr guest_gw;
struct in_addr map_host_loopback;
struct in_addr map_guest_addr;
@@ -107,7 +108,8 @@ struct ip4_ctx {
/**
* struct ip6_ctx - IPv6 execution context
- * @addr: IPv6 address assigned to guest
+ * @addrs: IPv6 addresses assigned to guest
+ * @addr_count: Number of addresses in addrs[] array
* @addr_seen: Latest IPv6 global/site address seen as source from tap
* @addr_ll_seen: Latest IPv6 link-local address seen as source from tap
* @guest_gw: IPv6 gateway as seen by the guest
@@ -126,7 +128,9 @@ struct ip4_ctx {
*/
struct ip6_ctx {
/* PIF_TAP addresses */
- struct in6_addr addr;
+ struct ip6_addr_entry addrs[IP6_MAX_ADDRS];
+ int addr_count;
+
struct in6_addr addr_seen;
struct in6_addr addr_ll_seen;
struct in6_addr guest_gw;
diff --git a/pasta.c b/pasta.c
index 674b554..49b393c 100644
--- a/pasta.c
+++ b/pasta.c
@@ -331,8 +331,8 @@ void pasta_ns_conf(struct ctx *c)
if (c->ip4.no_copy_addrs) {
rc = nl_addr_set(nl_sock_ns, c->pasta_ifi,
AF_INET,
- &c->ip4.addr,
- c->ip4.prefix_len);
+ &c->ip4.addrs[0].addr,
+ c->ip4.addrs[0].prefix_len);
} else {
rc = nl_addr_dup(nl_sock, c->ifi4,
nl_sock_ns, c->pasta_ifi,
@@ -378,10 +378,12 @@ void pasta_ns_conf(struct ctx *c)
0, IFF_NOARP);
if (c->ip6.no_copy_addrs) {
- if (!IN6_IS_ADDR_UNSPECIFIED(&c->ip6.addr)) {
+ struct in6_addr *a = &c->ip6.addrs[0].addr;
+
+ if (!IN6_IS_ADDR_UNSPECIFIED(a)) {
rc = nl_addr_set(nl_sock_ns,
- c->pasta_ifi, AF_INET6,
- &c->ip6.addr, 64);
+ c->pasta_ifi,
+ AF_INET6, a, 64);
}
} else {
rc = nl_addr_dup(nl_sock, c->ifi6,
diff --git a/tap.c b/tap.c
index e3ea61c..0b96cc1 100644
--- a/tap.c
+++ b/tap.c
@@ -951,8 +951,8 @@ resume:
c->ip6.addr_seen = *saddr;
}
- if (IN6_IS_ADDR_UNSPECIFIED(&c->ip6.addr))
- c->ip6.addr = *saddr;
+ if (IN6_IS_ADDR_UNSPECIFIED(&c->ip6.addrs[0].addr))
+ c->ip6.addrs[0].addr = *saddr;
} else if (!IN6_IS_ADDR_UNSPECIFIED(saddr)){
c->ip6.addr_seen = *saddr;
}
diff --git a/util.h b/util.h
index f7a941f..4273e0d 100644
--- a/util.h
+++ b/util.h
@@ -401,4 +401,5 @@ static inline int wrap_getsockname(int sockfd, struct sockaddr *addr,
#define PASST_MAXDNAME 254 /* 253 (RFC 1035) + 1 (the terminator) */
void encode_domain_name(char *buf, const char *domain_name);
+
#endif /* UTIL_H */
--
2.51.1