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-rw-r--r--checksum.c7
-rw-r--r--checksum.h3
-rw-r--r--conf.c55
-rw-r--r--dhcp.c11
-rw-r--r--icmp.c3
-rw-r--r--passt.c2
-rw-r--r--passt.h12
-rw-r--r--tap.c18
-rw-r--r--tap.h8
-rw-r--r--tcp.c48
-rw-r--r--tcp.h2
-rw-r--r--udp.c30
-rw-r--r--udp.h2
-rw-r--r--util.h12
14 files changed, 113 insertions, 100 deletions
diff --git a/checksum.c b/checksum.c
index c59869c..29769d9 100644
--- a/checksum.c
+++ b/checksum.c
@@ -133,7 +133,8 @@ void csum_ip4_header(struct iphdr *ip4h)
* @payload: ICMPv4 packet payload
* @len: Length of @payload (not including UDP)
*/
-void csum_udp4(struct udphdr *udp4hr, in_addr_t saddr, in_addr_t daddr,
+void csum_udp4(struct udphdr *udp4hr,
+ struct in_addr saddr, struct in_addr daddr,
const void *payload, size_t len)
{
/* UDP checksums are optional, so don't bother */
@@ -142,8 +143,8 @@ void csum_udp4(struct udphdr *udp4hr, in_addr_t saddr, in_addr_t daddr,
if (UDP4_REAL_CHECKSUMS) {
/* UNTESTED: if we did want real UDPv4 checksums, this
* is roughly what we'd need */
- uint32_t psum = csum_fold(htonl(saddr))
- + csum_fold(htonl(daddr))
+ uint32_t psum = csum_fold(saddr.s_addr)
+ + csum_fold(daddr.s_addr)
+ htons(len + sizeof(*udp4hr))
+ htons(IPPROTO_UDP);
/* Add in partial checksum for the UDP header alone */
diff --git a/checksum.h b/checksum.h
index b87b0d6..c6b6fb4 100644
--- a/checksum.h
+++ b/checksum.h
@@ -14,7 +14,8 @@ uint32_t sum_16b(const void *buf, size_t len);
uint16_t csum_fold(uint32_t sum);
uint16_t csum_unaligned(const void *buf, size_t len, uint32_t init);
void csum_ip4_header(struct iphdr *ip4h);
-void csum_udp4(struct udphdr *udp4hr, in_addr_t saddr, in_addr_t daddr,
+void csum_udp4(struct udphdr *udp4hr,
+ struct in_addr saddr, struct in_addr daddr,
const void *payload, size_t len);
void csum_icmp4(struct icmphdr *ih, const void *payload, size_t len);
void csum_udp6(struct udphdr *udp6hr,
diff --git a/conf.c b/conf.c
index 3bf7301..f5099a7 100644
--- a/conf.c
+++ b/conf.c
@@ -358,12 +358,12 @@ static void get_dns(struct ctx *c)
int dns4_set, dns6_set, dnss_set, dns_set, fd;
struct in6_addr *dns6 = &c->ip6.dns[0];
struct fqdn *s = c->dns_search;
- uint32_t *dns4 = &c->ip4.dns[0];
+ struct in_addr *dns4 = &c->ip4.dns[0];
struct lineread resolvconf;
int line_len;
char *line, *p, *end;
- dns4_set = !c->ifi4 || !!*dns4;
+ dns4_set = !c->ifi4 || !IN4_IS_ADDR_UNSPECIFIED(dns4);
dns6_set = !c->ifi6 || !IN6_IS_ADDR_UNSPECIFIED(dns6);
dnss_set = !!*s->n || c->no_dns_search;
dns_set = (dns4_set && dns6_set) || c->no_dns;
@@ -389,15 +389,15 @@ static void get_dns(struct ctx *c)
dns4 - &c->ip4.dns[0] < ARRAY_SIZE(c->ip4.dns) - 1 &&
inet_pton(AF_INET, p + 1, dns4)) {
/* We can only access local addresses via the gw redirect */
- if (IPV4_IS_LOOPBACK(ntohl(*dns4))) {
+ if (IN4_IS_ADDR_LOOPBACK(dns4)) {
if (c->no_map_gw) {
- *dns4 = 0;
+ dns4->s_addr = htonl(INADDR_ANY);
continue;
}
*dns4 = c->ip4.gw;
}
dns4++;
- *dns4 = 0;
+ dns4->s_addr = htonl(INADDR_ANY);
}
if (!dns6_set &&
@@ -566,18 +566,19 @@ static unsigned int conf_ip4(unsigned int ifi,
return 0;
}
- if (!ip4->gw)
+ if (IN4_IS_ADDR_UNSPECIFIED(&ip4->gw))
nl_route(0, ifi, AF_INET, &ip4->gw);
- if (!ip4->addr)
+ if (IN4_IS_ADDR_UNSPECIFIED(&ip4->addr))
nl_addr(0, ifi, AF_INET, &ip4->addr, &ip4->prefix_len, NULL);
if (!ip4->prefix_len) {
- if (IN_CLASSA(ntohl(ip4->addr)))
+ in_addr_t addr = ntohl(ip4->addr.s_addr);
+ if (IN_CLASSA(addr))
ip4->prefix_len = (32 - IN_CLASSA_NSHIFT);
- else if (IN_CLASSB(ntohl(ip4->addr)))
+ else if (IN_CLASSB(addr))
ip4->prefix_len = (32 - IN_CLASSB_NSHIFT);
- else if (IN_CLASSC(ntohl(ip4->addr)))
+ else if (IN_CLASSC(addr))
ip4->prefix_len = (32 - IN_CLASSC_NSHIFT);
else
ip4->prefix_len = 32;
@@ -588,7 +589,9 @@ static unsigned int conf_ip4(unsigned int ifi,
if (MAC_IS_ZERO(mac))
nl_link(0, ifi, mac, 0, 0);
- if (!ip4->gw || !ip4->addr || MAC_IS_ZERO(mac))
+ if (IN4_IS_ADDR_UNSPECIFIED(&ip4->gw) ||
+ IN4_IS_ADDR_UNSPECIFIED(&ip4->addr) ||
+ MAC_IS_ZERO(mac))
return 0;
return ifi;
@@ -850,7 +853,7 @@ static void conf_print(const struct ctx *c)
inet_ntop(AF_INET, &c->ip4.gw, buf4, sizeof(buf4)));
}
- for (i = 0; c->ip4.dns[i]; i++) {
+ for (i = 0; !IN4_IS_ADDR_UNSPECIFIED(&c->ip4.dns[i]); i++) {
if (!i)
info("DNS:");
inet_ntop(AF_INET, &c->ip4.dns[i], buf4, sizeof(buf4));
@@ -1088,7 +1091,7 @@ void conf(struct ctx *c, int argc, char **argv)
char *runas = NULL, *logfile = NULL;
struct in6_addr *dns6 = c->ip6.dns;
struct fqdn *dnss = c->dns_search;
- uint32_t *dns4 = c->ip4.dns;
+ struct in_addr *dns4 = c->ip4.dns;
const char *optstring;
unsigned int ifi = 0;
int name, ret, b, i;
@@ -1186,11 +1189,11 @@ void conf(struct ctx *c, int argc, char **argv)
!IN6_IS_ADDR_LOOPBACK(&c->ip6.dns_fwd))
break;
- if (c->ip4.dns_fwd == htonl(INADDR_ANY) &&
+ if (IN4_IS_ADDR_UNSPECIFIED(&c->ip4.dns_fwd) &&
inet_pton(AF_INET, optarg, &c->ip4.dns_fwd) &&
- c->ip4.dns_fwd != htonl(INADDR_ANY) &&
- c->ip4.dns_fwd != htonl(INADDR_BROADCAST) &&
- !IPV4_IS_LOOPBACK(ntohl(c->ip4.dns_fwd)))
+ !IN4_IS_ADDR_UNSPECIFIED(&c->ip4.dns_fwd) &&
+ !IN4_IS_ADDR_BROADCAST(&c->ip4.dns_fwd) &&
+ !IN4_IS_ADDR_LOOPBACK(&c->ip4.dns_fwd))
break;
err("Invalid DNS forwarding address: %s", optarg);
@@ -1384,12 +1387,12 @@ void conf(struct ctx *c, int argc, char **argv)
!IN6_IS_ADDR_MULTICAST(&c->ip6.addr))
break;
- if (c->ip4.addr == htonl(INADDR_ANY) &&
+ if (IN4_IS_ADDR_UNSPECIFIED(&c->ip4.addr) &&
inet_pton(AF_INET, optarg, &c->ip4.addr) &&
- c->ip4.addr != htonl(INADDR_ANY) &&
- c->ip4.addr != htonl(INADDR_BROADCAST) &&
- !IPV4_IS_LOOPBACK(ntohl(c->ip4.addr)) &&
- !IN_MULTICAST(ntohl(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))
break;
err("Invalid address: %s", optarg);
@@ -1420,11 +1423,11 @@ void conf(struct ctx *c, int argc, char **argv)
!IN6_IS_ADDR_LOOPBACK(&c->ip6.gw))
break;
- if (c->ip4.gw == htonl(INADDR_ANY) &&
+ if (IN4_IS_ADDR_UNSPECIFIED(&c->ip4.gw) &&
inet_pton(AF_INET, optarg, &c->ip4.gw) &&
- c->ip4.gw != htonl(INADDR_ANY) &&
- c->ip4.gw != htonl(INADDR_BROADCAST) &&
- !IPV4_IS_LOOPBACK(ntohl(c->ip4.gw)))
+ !IN4_IS_ADDR_UNSPECIFIED(&c->ip4.gw) &&
+ !IN4_IS_ADDR_BROADCAST(&c->ip4.gw) &&
+ !IN4_IS_ADDR_LOOPBACK(&c->ip4.gw))
break;
err("Invalid gateway address: %s", optarg);
diff --git a/dhcp.c b/dhcp.c
index 076e9b6..0c6f712 100644
--- a/dhcp.c
+++ b/dhcp.c
@@ -107,7 +107,7 @@ struct msg {
uint16_t secs;
uint16_t flags;
uint32_t ciaddr;
- uint32_t yiaddr;
+ struct in_addr yiaddr;
uint32_t siaddr;
uint32_t giaddr;
uint8_t chaddr[16];
@@ -343,7 +343,8 @@ int dhcp(const struct ctx *c, const struct pool *p)
/* 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 & mask.s_addr) != (c->ip4.gw & mask.s_addr)) {
+ if ((c->ip4.addr.s_addr & mask.s_addr)
+ != (c->ip4.gw.s_addr & mask.s_addr)) {
/* a.b.c.d/32:0.0.0.0, 0:a.b.c.d */
opts[121].slen = 14;
opts[121].s[0] = 32;
@@ -357,8 +358,10 @@ int dhcp(const struct ctx *c, const struct pool *p)
opts[26].s[1] = c->mtu % 256;
}
- for (i = 0, opts[6].slen = 0; !c->no_dhcp_dns && c->ip4.dns[i]; i++) {
- ((uint32_t *)opts[6].s)[i] = c->ip4.dns[i];
+ for (i = 0, opts[6].slen = 0;
+ !c->no_dhcp_dns && !IN4_IS_ADDR_UNSPECIFIED(&c->ip4.dns[i]);
+ i++) {
+ ((struct in_addr *)opts[6].s)[i] = c->ip4.dns[i];
opts[6].slen += sizeof(uint32_t);
}
diff --git a/icmp.c b/icmp.c
index d388815..b842fa8 100644
--- a/icmp.c
+++ b/icmp.c
@@ -130,8 +130,7 @@ void icmp_sock_handler(const struct ctx *c, union epoll_ref ref,
debug("ICMP: echo %s to tap, ID: %i, seq: %i",
(ih->type == ICMP_ECHO) ? "request" : "reply", id, seq);
- tap_icmp4_send(c, sr4->sin_addr.s_addr, tap_ip4_daddr(c),
- buf, n);
+ tap_icmp4_send(c, sr4->sin_addr, tap_ip4_daddr(c), buf, n);
}
}
diff --git a/passt.c b/passt.c
index 34cd832..fd703de 100644
--- a/passt.c
+++ b/passt.c
@@ -136,7 +136,7 @@ static void timer_init(struct ctx *c, const struct timespec *now)
* @ip_da: Pointer to IPv4 destination address, NULL if unchanged
*/
void proto_update_l2_buf(const unsigned char *eth_d, const unsigned char *eth_s,
- const uint32_t *ip_da)
+ const struct in_addr *ip_da)
{
tcp_update_l2_buf(eth_d, eth_s, ip_da);
udp_update_l2_buf(eth_d, eth_s, ip_da);
diff --git a/passt.h b/passt.h
index 4cf6078..1a8d74b 100644
--- a/passt.h
+++ b/passt.h
@@ -105,12 +105,12 @@ enum passt_modes {
* @dns_fwd: Address forwarded (UDP) to first IPv4 DNS, network order
*/
struct ip4_ctx {
- uint32_t addr;
- uint32_t addr_seen;
+ struct in_addr addr;
+ struct in_addr addr_seen;
int prefix_len;
- uint32_t gw;
- uint32_t dns[MAXNS + 1];
- uint32_t dns_fwd;
+ struct in_addr gw;
+ struct in_addr dns[MAXNS + 1];
+ struct in_addr dns_fwd;
};
/**
@@ -248,6 +248,6 @@ struct ctx {
};
void proto_update_l2_buf(const unsigned char *eth_d, const unsigned char *eth_s,
- const uint32_t *ip_da);
+ const struct in_addr *ip_da);
#endif /* PASST_H */
diff --git a/tap.c b/tap.c
index 0a3ccce..84e93c2 100644
--- a/tap.c
+++ b/tap.c
@@ -92,7 +92,7 @@ int tap_send(const struct ctx *c, const void *data, size_t len)
*
* Returns: IPv4 address, network order
*/
-in_addr_t tap_ip4_daddr(const struct ctx *c)
+struct in_addr tap_ip4_daddr(const struct ctx *c)
{
return c->ip4.addr_seen;
}
@@ -141,7 +141,7 @@ static void *tap_push_l2h(const struct ctx *c, void *buf, uint16_t proto)
*
* Return: pointer at which to write the packet's payload
*/
-static void *tap_push_ip4h(char *buf, in_addr_t src, in_addr_t dst,
+static void *tap_push_ip4h(char *buf, struct in_addr src, struct in_addr dst,
size_t len, uint8_t proto)
{
struct iphdr *ip4h = (struct iphdr *)buf;
@@ -154,8 +154,8 @@ static void *tap_push_ip4h(char *buf, in_addr_t src, in_addr_t dst,
ip4h->frag_off = 0;
ip4h->ttl = 255;
ip4h->protocol = proto;
- ip4h->saddr = src;
- ip4h->daddr = dst;
+ ip4h->saddr = src.s_addr;
+ ip4h->daddr = dst.s_addr;
csum_ip4_header(ip4h);
return ip4h + 1;
}
@@ -170,8 +170,8 @@ static void *tap_push_ip4h(char *buf, in_addr_t src, in_addr_t dst,
* @in: UDP payload contents (not including UDP header)
* @len: UDP payload length (not including UDP header)
*/
-void tap_udp4_send(const struct ctx *c, in_addr_t src, in_port_t sport,
- in_addr_t dst, in_port_t dport,
+void tap_udp4_send(const struct ctx *c, struct in_addr src, in_port_t sport,
+ struct in_addr dst, in_port_t dport,
const void *in, size_t len)
{
size_t udplen = len + sizeof(struct udphdr);
@@ -199,7 +199,7 @@ void tap_udp4_send(const struct ctx *c, in_addr_t src, in_port_t sport,
* @in: ICMP packet, including ICMP header
* @len: ICMP packet length, including ICMP header
*/
-void tap_icmp4_send(const struct ctx *c, in_addr_t src, in_addr_t dst,
+void tap_icmp4_send(const struct ctx *c, struct in_addr src, struct in_addr dst,
void *in, size_t len)
{
char buf[USHRT_MAX];
@@ -448,8 +448,8 @@ resume:
l4_len = l3_len - hlen;
- if (iph->saddr && c->ip4.addr_seen != iph->saddr) {
- c->ip4.addr_seen = iph->saddr;
+ if (iph->saddr && c->ip4.addr_seen.s_addr != iph->saddr) {
+ c->ip4.addr_seen.s_addr = iph->saddr;
proto_update_l2_buf(NULL, NULL, &c->ip4.addr_seen);
}
diff --git a/tap.h b/tap.h
index 743bc58..674ab5c 100644
--- a/tap.h
+++ b/tap.h
@@ -6,11 +6,11 @@
#ifndef TAP_H
#define TAP_H
-in_addr_t tap_ip4_daddr(const struct ctx *c);
-void tap_udp4_send(const struct ctx *c, in_addr_t src, in_port_t sport,
- in_addr_t dst, in_port_t dport,
+struct in_addr tap_ip4_daddr(const struct ctx *c);
+void tap_udp4_send(const struct ctx *c, struct in_addr src, in_port_t sport,
+ struct in_addr dst, in_port_t dport,
const void *in, size_t len);
-void tap_icmp4_send(const struct ctx *c, in_addr_t src, in_addr_t dst,
+void tap_icmp4_send(const struct ctx *c, struct in_addr src, struct in_addr dst,
void *in, size_t len);
const struct in6_addr *tap_ip6_daddr(const struct ctx *c,
const struct in6_addr *src);
diff --git a/tcp.c b/tcp.c
index e6979a9..7405ba9 100644
--- a/tcp.c
+++ b/tcp.c
@@ -1107,7 +1107,7 @@ static void tcp_update_check_tcp6(struct tcp6_l2_buf_t *buf)
* @ip_da: Pointer to IPv4 destination address, NULL if unchanged
*/
void tcp_update_l2_buf(const unsigned char *eth_d, const unsigned char *eth_s,
- const uint32_t *ip_da)
+ const struct in_addr *ip_da)
{
int i;
@@ -1134,16 +1134,16 @@ void tcp_update_l2_buf(const unsigned char *eth_d, const unsigned char *eth_s,
}
if (ip_da) {
- b4f->iph.daddr = b4->iph.daddr = *ip_da;
+ b4f->iph.daddr = b4->iph.daddr = ip_da->s_addr;
if (!i) {
b4f->iph.saddr = b4->iph.saddr = 0;
b4f->iph.tot_len = b4->iph.tot_len = 0;
b4f->iph.check = b4->iph.check = 0;
b4f->psum = b4->psum = sum_16b(&b4->iph, 20);
- b4->tsum = ((*ip_da >> 16) & 0xffff) +
- (*ip_da & 0xffff) +
- htons(IPPROTO_TCP);
+ b4->tsum = ((ip_da->s_addr >> 16) & 0xffff) +
+ (ip_da->s_addr & 0xffff) +
+ htons(IPPROTO_TCP);
b4f->tsum = b4->tsum;
} else {
b4f->psum = b4->psum = tcp4_l2_buf[0].psum;
@@ -1701,7 +1701,7 @@ do { \
ip_len = plen + sizeof(struct iphdr) + sizeof(struct tcphdr);
b->iph.tot_len = htons(ip_len);
b->iph.saddr = conn->a.a4.a.s_addr;
- b->iph.daddr = c->ip4.addr_seen;
+ b->iph.daddr = c->ip4.addr_seen.s_addr;
if (check)
b->iph.check = *check;
@@ -2048,7 +2048,7 @@ static uint32_t tcp_seq_init(const struct ctx *c, int af, const void *addr,
} __attribute__((__packed__)) in = {
.src = *(struct in_addr *)addr,
.srcport = srcport,
- .dst = { c->ip4.addr },
+ .dst = c->ip4.addr,
.dstport = dstport,
};
@@ -2176,10 +2176,10 @@ static void tcp_conn_from_tap(struct ctx *c, int af, const void *addr,
return;
if (!c->no_map_gw) {
- if (af == AF_INET && addr4.sin_addr.s_addr == c->ip4.gw)
- addr4.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
+ if (af == AF_INET && IN4_ARE_ADDR_EQUAL(addr, &c->ip4.gw))
+ addr4.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
if (af == AF_INET6 && IN6_ARE_ADDR_EQUAL(addr, &c->ip6.gw))
- addr6.sin6_addr = in6addr_loopback;
+ addr6.sin6_addr = in6addr_loopback;
}
if (af == AF_INET6 && IN6_IS_ADDR_LINKLOCAL(&addr6.sin6_addr)) {
@@ -2899,30 +2899,28 @@ static void tcp_conn_from_sock(struct ctx *c, union epoll_ref ref,
tcp_hash_insert(c, conn, AF_INET6, &sa6.sin6_addr);
} else {
struct sockaddr_in sa4;
- in_addr_t s_addr;
memcpy(&sa4, &sa, sizeof(sa4));
- s_addr = ntohl(sa4.sin_addr.s_addr);
memset(&conn->a.a4.zero, 0, sizeof(conn->a.a4.zero));
memset(&conn->a.a4.one, 0xff, sizeof(conn->a.a4.one));
- if (IPV4_IS_LOOPBACK(s_addr) || s_addr == INADDR_ANY ||
- htonl(s_addr) == c->ip4.addr_seen)
- s_addr = ntohl(c->ip4.gw);
+ if (IN4_IS_ADDR_LOOPBACK(&sa4.sin_addr) ||
+ IN4_IS_ADDR_UNSPECIFIED(&sa4.sin_addr) ||
+ IN4_ARE_ADDR_EQUAL(&sa4.sin_addr, &c->ip4.addr_seen))
+ sa4.sin_addr = c->ip4.gw;
- s_addr = htonl(s_addr);
- memcpy(&conn->a.a4.a, &s_addr, sizeof(conn->a.a4.a));
+ conn->a.a4.a = sa4.sin_addr;
conn->sock_port = ntohs(sa4.sin_port);
conn->tap_port = ref.r.p.tcp.tcp.index;
- conn->seq_to_tap = tcp_seq_init(c, AF_INET, &s_addr,
+ conn->seq_to_tap = tcp_seq_init(c, AF_INET, &sa4.sin_addr,
conn->sock_port,
conn->tap_port,
now);
- tcp_hash_insert(c, conn, AF_INET, &s_addr);
+ tcp_hash_insert(c, conn, AF_INET, &sa4.sin_addr);
}
conn->seq_ack_from_tap = conn->seq_to_tap + 1;
@@ -3081,7 +3079,7 @@ void tcp_sock_handler(struct ctx *c, union epoll_ref ref, uint32_t events,
* @ifname: Name of interface to bind to, NULL if not configured
* @port: Port, host order
*/
-static void tcp_sock_init4(const struct ctx *c, int ns, const in_addr_t *addr,
+static void tcp_sock_init4(const struct ctx *c, int ns, const struct in_addr *addr,
const char *ifname, in_port_t port)
{
union tcp_epoll_ref tref = { .tcp.listen = 1, .tcp.outbound = ns };
@@ -3089,14 +3087,13 @@ static void tcp_sock_init4(const struct ctx *c, int ns, const in_addr_t *addr,
int s;
if (c->mode == MODE_PASTA) {
- spliced = !addr ||
- ntohl(*addr) == INADDR_ANY ||
- IPV4_IS_LOOPBACK(ntohl(*addr));
+ spliced = !addr || IN4_IS_ADDR_UNSPECIFIED(addr) ||
+ IN4_IS_ADDR_LOOPBACK(addr);
if (!addr)
addr = &c->ip4.addr;
- tap = !ns && !IPV4_IS_LOOPBACK(ntohl(*addr));
+ tap = !ns && !IN4_IS_ADDR_LOOPBACK(addr);
}
if (ns)
@@ -3117,9 +3114,10 @@ static void tcp_sock_init4(const struct ctx *c, int ns, const in_addr_t *addr,
}
if (spliced) {
+ struct in_addr loopback = { htonl(INADDR_LOOPBACK) };
tref.tcp.splice = 1;
- addr = &(uint32_t){ htonl(INADDR_LOOPBACK) };
+ addr = &loopback;
s = sock_l4(c, AF_INET, IPPROTO_TCP, addr, ifname, port,
tref.u32);
diff --git a/tcp.h b/tcp.h
index 72e7815..3fabb5a 100644
--- a/tcp.h
+++ b/tcp.h
@@ -28,7 +28,7 @@ void tcp_defer_handler(struct ctx *c);
void tcp_sock_set_bufsize(const struct ctx *c, int s);
void tcp_update_l2_buf(const unsigned char *eth_d, const unsigned char *eth_s,
- const uint32_t *ip_da);
+ const struct in_addr *ip_da);
/**
* union tcp_epoll_ref - epoll reference portion for TCP connections
diff --git a/udp.c b/udp.c
index 7ce533d..fca418d 100644
--- a/udp.c
+++ b/udp.c
@@ -298,7 +298,7 @@ static void udp_update_check4(struct udp4_l2_buf_t *buf)
* @ip_da: Pointer to IPv4 destination address, NULL if unchanged
*/
void udp_update_l2_buf(const unsigned char *eth_d, const unsigned char *eth_s,
- const uint32_t *ip_da)
+ const struct in_addr *ip_da)
{
int i;
@@ -317,7 +317,7 @@ void udp_update_l2_buf(const unsigned char *eth_d, const unsigned char *eth_s,
}
if (ip_da) {
- b4->iph.daddr = *ip_da;
+ b4->iph.daddr = ip_da->s_addr;
if (!i) {
b4->iph.saddr = 0;
b4->iph.tot_len = 0;
@@ -671,30 +671,30 @@ static void udp_sock_fill_data_v4(const struct ctx *c, int n,
struct udp4_l2_buf_t *b = &udp4_l2_buf[n];
size_t ip_len, buf_len;
in_port_t src_port;
- in_addr_t src;
ip_len = udp4_l2_mh_sock[n].msg_len + sizeof(b->iph) + sizeof(b->uh);
b->iph.tot_len = htons(ip_len);
- src = ntohl(b->s_in.sin_addr.s_addr);
src_port = ntohs(b->s_in.sin_port);
- if (IPV4_IS_LOOPBACK(src) ||
- src == INADDR_ANY || src == ntohl(c->ip4.addr_seen)) {
- b->iph.saddr = c->ip4.gw;
+ if (IN4_IS_ADDR_LOOPBACK(&b->s_in.sin_addr) ||
+ IN4_IS_ADDR_UNSPECIFIED(&b->s_in.sin_addr)||
+ IN4_ARE_ADDR_EQUAL(&b->s_in.sin_addr, &c->ip4.addr_seen)) {
+ b->iph.saddr = c->ip4.gw.s_addr;
udp_tap_map[V4][src_port].ts = now->tv_sec;
udp_tap_map[V4][src_port].flags |= PORT_LOCAL;
- if (b->s_in.sin_addr.s_addr == c->ip4.addr_seen)
+ if (IN4_ARE_ADDR_EQUAL(&b->s_in.sin_addr.s_addr, &c->ip4.addr_seen))
udp_tap_map[V4][src_port].flags &= ~PORT_LOOPBACK;
else
udp_tap_map[V4][src_port].flags |= PORT_LOOPBACK;
bitmap_set(udp_act[V4][UDP_ACT_TAP], src_port);
- } else if (c->ip4.dns_fwd &&
- src == htonl(c->ip4.dns[0]) && src_port == 53) {
- b->iph.saddr = c->ip4.dns_fwd;
+ } else if (!IN4_IS_ADDR_UNSPECIFIED(&c->ip4.dns_fwd) &&
+ IN4_ARE_ADDR_EQUAL(&b->s_in.sin_addr, &c->ip4.dns[0]) &&
+ src_port == 53) {
+ b->iph.saddr = c->ip4.dns_fwd.s_addr;
} else {
b->iph.saddr = b->s_in.sin_addr.s_addr;
}
@@ -1016,15 +1016,15 @@ int udp_tap_handler(struct ctx *c, int af, const void *addr,
udp_tap_map[V4][src].ts = now->tv_sec;
- if (s_in.sin_addr.s_addr == c->ip4.gw && !c->no_map_gw) {
+ if (IN4_ARE_ADDR_EQUAL(&s_in.sin_addr, &c->ip4.gw) && !c->no_map_gw) {
if (!(udp_tap_map[V4][dst].flags & PORT_LOCAL) ||
(udp_tap_map[V4][dst].flags & PORT_LOOPBACK))
s_in.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
else
- s_in.sin_addr.s_addr = c->ip4.addr_seen;
- } else if (s_in.sin_addr.s_addr == c->ip4.dns_fwd &&
+ s_in.sin_addr = c->ip4.addr_seen;
+ } else if (IN4_ARE_ADDR_EQUAL(&s_in.sin_addr, &c->ip4.dns_fwd) &&
ntohs(s_in.sin_port) == 53) {
- s_in.sin_addr.s_addr = c->ip4.dns[0];
+ s_in.sin_addr = c->ip4.dns[0];
}
} else {
s_in6 = (struct sockaddr_in6) {
diff --git a/udp.h b/udp.h
index b4ee8b7..2ac8610 100644
--- a/udp.h
+++ b/udp.h
@@ -17,7 +17,7 @@ void udp_sock_init(const struct ctx *c, int ns, sa_family_t af,
int udp_init(struct ctx *c);
void udp_timer(struct ctx *c, const struct timespec *ts);
void udp_update_l2_buf(const unsigned char *eth_d, const unsigned char *eth_s,
- const uint32_t *ip_da);
+ const struct in_addr *ip_da);
/**
* union udp_epoll_ref - epoll reference portion for TCP connections
diff --git a/util.h b/util.h
index c498a80..2d4e1ff 100644
--- a/util.h
+++ b/util.h
@@ -69,8 +69,16 @@
#define MAC_ZERO ((uint8_t [ETH_ALEN]){ 0 })
#define MAC_IS_ZERO(addr) (!memcmp((addr), MAC_ZERO, ETH_ALEN))
-#define IPV4_IS_LOOPBACK(addr) \
- ((addr) >> IN_CLASSA_NSHIFT == IN_LOOPBACKNET)
+#define IN4_IS_ADDR_UNSPECIFIED(a) \
+ ((a)->s_addr == htonl(INADDR_ANY))
+#define IN4_IS_ADDR_BROADCAST(a) \
+ ((a)->s_addr == htonl(INADDR_BROADCAST))
+#define IN4_IS_ADDR_LOOPBACK(a) \
+ (ntohl((a)->s_addr) >> IN_CLASSA_NSHIFT == IN_LOOPBACKNET)
+#define IN4_IS_ADDR_MULTICAST(a) \
+ (IN_MULTICAST(ntohl((a)->s_addr)))
+#define IN4_ARE_ADDR_EQUAL(a, b) \
+ (((struct in_addr *)(a))->s_addr == ((struct in_addr *)b)->s_addr)
#define NS_FN_STACK_SIZE (RLIMIT_STACK_VAL * 1024 / 8)
#define NS_CALL(fn, arg) \
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-28 16:43:51 +0000