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-rw-r--r--src/dhcpv4.c4
-rw-r--r--src/dhcpv6.c57
-rw-r--r--src/dhcpv6.h1
-rw-r--r--src/ndp.c8
-rw-r--r--src/odhcpd.c5
-rw-r--r--src/odhcpd.h2
-rw-r--r--src/router.c4
7 files changed, 54 insertions, 27 deletions
diff --git a/src/dhcpv4.c b/src/dhcpv4.c
index b8d64ce..9746aa2 100644
--- a/src/dhcpv4.c
+++ b/src/dhcpv4.c
@@ -34,7 +34,7 @@
static void handle_dhcpv4(void *addr, void *data, size_t len,
- struct interface *iface);
+ struct interface *iface, void *dest_addr);
static struct dhcpv4_assignment* dhcpv4_lease(struct interface *iface,
enum dhcpv4_msg msg, const uint8_t *mac, struct in_addr reqaddr,
const char *hostname);
@@ -225,7 +225,7 @@ static void dhcpv4_put(struct dhcpv4_message *msg, uint8_t **cookie,
// Simple DHCPv6-server for information requests
static void handle_dhcpv4(void *addr, void *data, size_t len,
- struct interface *iface)
+ struct interface *iface, _unused void *dest_addr)
{
if (!iface->dhcpv4)
return;
diff --git a/src/dhcpv6.c b/src/dhcpv6.c
index c2bb1c1..f0a4938 100644
--- a/src/dhcpv6.c
+++ b/src/dhcpv6.c
@@ -28,9 +28,9 @@ static void relay_client_request(struct sockaddr_in6 *source,
static void relay_server_response(uint8_t *data, size_t len);
static void handle_dhcpv6(void *addr, void *data, size_t len,
- struct interface *iface);
+ struct interface *iface, void *dest);
static void handle_client_request(void *addr, void *data, size_t len,
- struct interface *iface);
+ struct interface *iface, void *dest_addr);
@@ -100,6 +100,8 @@ int setup_dhcpv6_interface(struct interface *iface, bool enable)
enum {
IOV_NESTED = 0,
IOV_DEST,
+ IOV_MAXRT,
+#define IOV_STAT IOV_MAXRT
IOV_DNS,
IOV_DNS_ADDR,
IOV_SEARCH,
@@ -167,12 +169,12 @@ static void update_nested_message(uint8_t *data, size_t len, ssize_t pdiff)
}
}
-
// Simple DHCPv6-server for information requests
static void handle_client_request(void *addr, void *data, size_t len,
- struct interface *iface)
+ struct interface *iface, void *dest_addr)
{
struct dhcpv6_client_header *hdr = data;
+
if (len < sizeof(*hdr))
return;
@@ -187,9 +189,6 @@ static void handle_client_request(void *addr, void *data, size_t len,
uint16_t duid_type;
uint16_t hardware_type;
uint8_t mac[6];
- uint16_t solmaxrt_type;
- uint16_t solmaxrt_length;
- uint32_t solmaxrt_value;
uint16_t clientid_type;
uint16_t clientid_length;
uint8_t clientid_buf[130];
@@ -199,9 +198,6 @@ static void handle_client_request(void *addr, void *data, size_t len,
.serverid_length = htons(10),
.duid_type = htons(3),
.hardware_type = htons(1),
- .solmaxrt_type = htons(DHCPV6_OPT_SOL_MAX_RT),
- .solmaxrt_length = htons(4),
- .solmaxrt_value = htonl(60),
.clientid_type = htons(DHCPV6_OPT_CLIENTID),
.clientid_buf = {0}
};
@@ -210,9 +206,16 @@ static void handle_client_request(void *addr, void *data, size_t len,
struct __attribute__((packed)) {
uint16_t type;
uint16_t len;
+ uint32_t value;
+ } maxrt = {htons(DHCPV6_OPT_SOL_MAX_RT), htons(sizeof(maxrt) - 4),
+ htonl(60)};
+
+ struct __attribute__((packed)) {
+ uint16_t type;
+ uint16_t len;
uint16_t value;
} stat = {htons(DHCPV6_OPT_STATUS), htons(sizeof(stat) - 4),
- htons(DHCPV6_STATUS_NOADDRSAVAIL)};
+ htons(DHCPV6_STATUS_USEMULTICAST)};
struct __attribute__((packed)) {
uint16_t type;
@@ -269,6 +272,7 @@ static void handle_client_request(void *addr, void *data, size_t len,
struct iovec iov[IOV_TOTAL] = {
[IOV_NESTED] = {NULL, 0},
[IOV_DEST] = {&dest, (uint8_t*)&dest.clientid_type - (uint8_t*)&dest},
+ [IOV_MAXRT] = {&maxrt, sizeof(maxrt)},
[IOV_DNS] = {&dns, (dns_cnt) ? sizeof(dns) : 0},
[IOV_DNS_ADDR] = {dns_addr, dns_cnt * sizeof(*dns_addr)},
[IOV_SEARCH] = {&search, (search_len) ? sizeof(search) : 0},
@@ -288,6 +292,11 @@ static void handle_client_request(void *addr, void *data, size_t len,
if (opts[-4] == DHCPV6_MSG_ADVERTISE || opts[-4] == DHCPV6_MSG_REPLY || opts[-4] == DHCPV6_MSG_RELAY_REPL)
return;
+ if (!IN6_IS_ADDR_MULTICAST((struct in6_addr *)dest_addr) && iov[IOV_NESTED].iov_len == 0 &&
+ (opts[-4] == DHCPV6_MSG_SOLICIT || opts[-4] == DHCPV6_MSG_CONFIRM ||
+ opts[-4] == DHCPV6_MSG_REBIND || opts[-4] == DHCPV6_MSG_INFORMATION_REQUEST))
+ return;
+
if (opts[-4] == DHCPV6_MSG_SOLICIT) {
dest.msg_type = DHCPV6_MSG_ADVERTISE;
} else if (opts[-4] == DHCPV6_MSG_INFORMATION_REQUEST) {
@@ -332,6 +341,19 @@ static void handle_client_request(void *addr, void *data, size_t len,
}
}
+ if (!IN6_IS_ADDR_MULTICAST((struct in6_addr *)dest_addr) && iov[IOV_NESTED].iov_len == 0 &&
+ (opts[-4] == DHCPV6_MSG_REQUEST || opts[-4] == DHCPV6_MSG_RENEW ||
+ opts[-4] == DHCPV6_MSG_RELEASE || opts[-4] == DHCPV6_MSG_DECLINE)) {
+ iov[IOV_STAT].iov_base = &stat;
+ iov[IOV_STAT].iov_len = sizeof(stat);
+
+ for (ssize_t i = IOV_STAT + 1; i < IOV_TOTAL; ++i)
+ iov[i].iov_len = 0;
+
+ odhcpd_send(iface->dhcpv6_event.uloop.fd, addr, iov, ARRAY_SIZE(iov), iface);
+ return;
+ }
+
if (opts[-4] != DHCPV6_MSG_INFORMATION_REQUEST) {
ssize_t ialen = dhcpv6_handle_ia(pdbuf, sizeof(pdbuf), iface, addr, &opts[-4], opts_end);
iov[IOV_PDBUF].iov_len = ialen;
@@ -340,10 +362,11 @@ static void handle_client_request(void *addr, void *data, size_t len,
}
if (iov[IOV_NESTED].iov_len > 0) // Update length
- update_nested_message(data, len, iov[IOV_DEST].iov_len + iov[IOV_DNS].iov_len +
- iov[IOV_DNS_ADDR].iov_len + iov[IOV_SEARCH].iov_len +
- iov[IOV_SEARCH_DOMAIN].iov_len + iov[IOV_PDBUF].iov_len +
- iov[IOV_CERID].iov_len + iov[IOV_DHCPV6_RAW].iov_len - (4 + opts_end - opts));
+ update_nested_message(data, len, iov[IOV_DEST].iov_len + iov[IOV_MAXRT].iov_len +
+ iov[IOV_DNS].iov_len + iov[IOV_DNS_ADDR].iov_len +
+ iov[IOV_SEARCH].iov_len + iov[IOV_SEARCH_DOMAIN].iov_len +
+ iov[IOV_PDBUF].iov_len + iov[IOV_CERID].iov_len +
+ iov[IOV_DHCPV6_RAW].iov_len - (4 + opts_end - opts));
odhcpd_send(iface->dhcpv6_event.uloop.fd, addr, iov, ARRAY_SIZE(iov), iface);
}
@@ -351,10 +374,10 @@ static void handle_client_request(void *addr, void *data, size_t len,
// Central DHCPv6-relay handler
static void handle_dhcpv6(void *addr, void *data, size_t len,
- struct interface *iface)
+ struct interface *iface, void *dest_addr)
{
if (iface->dhcpv6 == RELAYD_SERVER) {
- handle_client_request(addr, data, len, iface);
+ handle_client_request(addr, data, len, iface, dest_addr);
} else if (iface->dhcpv6 == RELAYD_RELAY) {
if (iface->master)
relay_server_response(data, len);
diff --git a/src/dhcpv6.h b/src/dhcpv6.h
index dbde88a..e892884 100644
--- a/src/dhcpv6.h
+++ b/src/dhcpv6.h
@@ -69,6 +69,7 @@
#define DHCPV6_STATUS_NOADDRSAVAIL 2
#define DHCPV6_STATUS_NOBINDING 3
#define DHCPV6_STATUS_NOTONLINK 4
+#define DHCPV6_STATUS_USEMULTICAST 5
#define DHCPV6_STATUS_NOPREFIXAVAIL 6
// I just remembered I have an old one lying around...
diff --git a/src/ndp.c b/src/ndp.c
index 17ec8b4..50529b5 100644
--- a/src/ndp.c
+++ b/src/ndp.c
@@ -32,9 +32,9 @@
static void handle_solicit(void *addr, void *data, size_t len,
- struct interface *iface);
+ struct interface *iface, void *dest);
static void handle_rtnetlink(void *addr, void *data, size_t len,
- struct interface *iface);
+ struct interface *iface, void *dest);
static struct ndp_neighbor* find_neighbor(struct in6_addr *addr, bool strict);
static void modify_neighbor(struct in6_addr *addr, struct interface *iface,
bool add);
@@ -223,7 +223,7 @@ static ssize_t ping6(struct in6_addr *addr,
// Handle solicitations
static void handle_solicit(void *addr, void *data, size_t len,
- struct interface *iface)
+ struct interface *iface, _unused void *dest)
{
struct ip6_hdr *ip6 = data;
struct nd_neighbor_solicit *req = (struct nd_neighbor_solicit*)&ip6[1];
@@ -435,7 +435,7 @@ static void modify_neighbor(struct in6_addr *addr,
// Handler for neighbor cache entries from the kernel. This is our source
// to learn and unlearn hosts on interfaces.
static void handle_rtnetlink(_unused void *addr, void *data, size_t len,
- _unused struct interface *iface)
+ _unused struct interface *iface, _unused void *dest)
{
for (struct nlmsghdr *nh = data; NLMSG_OK(nh, len);
nh = NLMSG_NEXT(nh, len)) {
diff --git a/src/odhcpd.c b/src/odhcpd.c
index bf9f16d..794bbfc 100644
--- a/src/odhcpd.c
+++ b/src/odhcpd.c
@@ -319,6 +319,7 @@ static void odhcpd_receive_packets(struct uloop_fd *u, _unused unsigned int even
// Extract destination interface
int destiface = 0;
int *hlim = NULL;
+ void *dest = NULL;
struct in6_pktinfo *pktinfo;
struct in_pktinfo *pkt4info;
for (struct cmsghdr *ch = CMSG_FIRSTHDR(&msg); ch != NULL; ch = CMSG_NXTHDR(&msg, ch)) {
@@ -326,10 +327,12 @@ static void odhcpd_receive_packets(struct uloop_fd *u, _unused unsigned int even
ch->cmsg_type == IPV6_PKTINFO) {
pktinfo = (struct in6_pktinfo*)CMSG_DATA(ch);
destiface = pktinfo->ipi6_ifindex;
+ dest = &pktinfo->ipi6_addr;
} else if (ch->cmsg_level == IPPROTO_IP &&
ch->cmsg_type == IP_PKTINFO) {
pkt4info = (struct in_pktinfo*)CMSG_DATA(ch);
destiface = pkt4info->ipi_ifindex;
+ dest = &pkt4info->ipi_addr;
} else if (ch->cmsg_level == IPPROTO_IPV6 &&
ch->cmsg_type == IPV6_HOPLIMIT) {
hlim = (int*)CMSG_DATA(ch);
@@ -363,7 +366,7 @@ static void odhcpd_receive_packets(struct uloop_fd *u, _unused unsigned int even
syslog(LOG_DEBUG, "Received %li Bytes from %s%%%s", (long)len,
ipbuf, (iface) ? iface->ifname : "netlink");
- e->handle_dgram(&addr, data_buf, len, iface);
+ e->handle_dgram(&addr, data_buf, len, iface, dest);
}
}
diff --git a/src/odhcpd.h b/src/odhcpd.h
index dfaec9b..b2b38dc 100644
--- a/src/odhcpd.h
+++ b/src/odhcpd.h
@@ -61,7 +61,7 @@ extern struct list_head leases;
struct odhcpd_event {
struct uloop_fd uloop;
void (*handle_dgram)(void *addr, void *data, size_t len,
- struct interface *iface);
+ struct interface *iface, void *dest_addr);
};
diff --git a/src/router.c b/src/router.c
index 772d770..f8ba5d7 100644
--- a/src/router.c
+++ b/src/router.c
@@ -30,7 +30,7 @@ static void forward_router_solicitation(const struct interface *iface);
static void forward_router_advertisement(uint8_t *data, size_t len);
static void handle_icmpv6(void *addr, void *data, size_t len,
- struct interface *iface);
+ struct interface *iface, void *dest);
static void send_router_advert(struct uloop_timeout *event);
static void sigusr1_refresh(int signal);
@@ -170,7 +170,7 @@ static bool router_icmpv6_valid(struct sockaddr_in6 *source, uint8_t *data, size
// Event handler for incoming ICMPv6 packets
static void handle_icmpv6(void *addr, void *data, size_t len,
- struct interface *iface)
+ struct interface *iface, _unused void *dest)
{
struct icmp6_hdr *hdr = data;
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-13 03:09:35 +0000