#include "odhcpd.h"
#include "dhcpv6.h"
#include "dhcpv4.h"
-#include "md5.h"
+#include "libubox/md5.h"
#include <time.h>
#include <errno.h>
static void update(struct interface *iface);
static void reconf_timer(struct uloop_timeout *event);
static struct uloop_timeout reconf_event = {.cb = reconf_timer};
-static int socket_fd = -1;
static uint32_t serial = 0;
+static uint8_t statemd5[16];
-int dhcpv6_ia_init(int dhcpv6_socket)
+int dhcpv6_ia_init(void)
{
- socket_fd = dhcpv6_socket;
uloop_timeout_set(&reconf_event, 2000);
return 0;
}
while (!list_empty(&iface->ia_assignments)) {
c = list_first_entry(&iface->ia_assignments, struct dhcpv6_assignment, head);
list_del(&c->head);
+ free(c->hostname);
+ free(c->classes);
free(c);
}
}
if (list_empty(&iface->ia_assignments)) {
struct dhcpv6_assignment *border = calloc(1, sizeof(*border));
+ if (!border) {
+ syslog(LOG_ERR, "Calloc failed for border on interface %s", iface->ifname);
+ return -1;
+ }
+
border->length = 64;
list_add(&border->head, &iface->ia_assignments);
}
list_for_each_entry(lease, &leases, head) {
// Construct entry
struct dhcpv6_assignment *a = calloc(1, sizeof(*a) + lease->duid_len);
+ if (!a) {
+ syslog(LOG_ERR, "Calloc failed for static lease assignment on interface %s",
+ iface->ifname);
+ return -1;
+ }
+
a->clid_len = lease->duid_len;
a->length = 128;
- a->assigned = lease->hostid;
+ if (lease->hostid) {
+ a->assigned = lease->hostid;
+ } else {
+ uint32_t i4a = ntohl(lease->ipaddr.s_addr) & 0xff;
+ a->assigned = ((i4a / 100) << 8) | (((i4a % 100) / 10) << 4) | (i4a % 10);
+ }
odhcpd_urandom(a->key, sizeof(a->key));
memcpy(a->clid_data, lease->duid, a->clid_len);
memcpy(a->mac, lease->mac.ether_addr_octet, sizeof(a->mac));
list_for_each_entry(c, &iface->ia_assignments, head) {
if (c->length != 128 || c->assigned > a->assigned) {
list_add_tail(&a->head, &c->head);
+ break;
} else if (c->assigned == a->assigned) {
// Already an assignment with that number
break;
a->hostname = strdup(lease->hostname);
}
} else {
+ free(a->classes);
+ free(a->hostname);
free(a);
}
}
md5_hash(reconf_msg.auth.key, 16, &md5);
md5_end(reconf_msg.auth.key, &md5);
- return odhcpd_send(socket_fd, &assign->peer, &iov, 1, iface);
+ return odhcpd_send(iface->dhcpv6_event.uloop.fd, &assign->peer, &iov, 1, iface);
}
void dhcpv6_write_statefile(void)
{
+ md5_ctx_t md5;
+ md5_begin(&md5);
+
if (config.dhcp_statefile) {
time_t now = odhcpd_time(), wall_time = time(NULL);
int fd = open(config.dhcp_statefile, O_CREAT | O_WRONLY | O_CLOEXEC, 0644);
if (iface->dhcpv6 != RELAYD_SERVER && iface->dhcpv4 != RELAYD_SERVER)
continue;
- if (iface->dhcpv6 == RELAYD_SERVER) {
+ if (iface->dhcpv6 == RELAYD_SERVER && iface->ia_assignments.next) {
struct dhcpv6_assignment *c;
list_for_each_entry(c, &iface->ia_assignments, head) {
if (c->clid_len == 0)
struct in6_addr addr;
for (size_t i = 0; i < iface->ia_addr_len; ++i) {
- if (iface->ia_addr[i].prefix > 64)
+ if (iface->ia_addr[i].prefix > 96)
continue;
addr = iface->ia_addr[i].addr;
addr.s6_addr32[1] |= htonl(c->assigned);
inet_ntop(AF_INET6, &addr, ipbuf, sizeof(ipbuf) - 1);
- if (c->length == 128 && c->hostname && i == 0)
- fprintf(fp, "%s\t%s\n", ipbuf, c->hostname);
+ if (c->length == 128 && c->hostname && i == 0) {
+ fputs(ipbuf, fp);
+
+ char b[256];
+ if (dn_expand(iface->search, iface->search + iface->search_len,
+ iface->search, b, sizeof(b)) > 0)
+ fprintf(fp, "\t%s.%s", c->hostname, b);
+
+ fprintf(fp, "\t%s\n", c->hostname);
+ md5_hash(ipbuf, strlen(ipbuf), &md5);
+ md5_hash(c->hostname, strlen(c->hostname), &md5);
+ }
l += snprintf(leasebuf + l, sizeof(leasebuf) - l, "%s/%hhu ", ipbuf, c->length);
}
}
}
- if (iface->dhcpv4 == RELAYD_SERVER) {
+ if (iface->dhcpv4 == RELAYD_SERVER && iface->dhcpv4_assignments.next) {
struct dhcpv4_assignment *c;
list_for_each_entry(c, &iface->dhcpv4_assignments, head) {
char ipbuf[INET6_ADDRSTRLEN];
struct in_addr addr = {htonl(c->addr)};
inet_ntop(AF_INET, &addr, ipbuf, sizeof(ipbuf) - 1);
- if (c->hostname[0])
- fprintf(fp, "%s\t%s\n", ipbuf, c->hostname);
+ if (c->hostname[0]) {
+ fputs(ipbuf, fp);
+
+ char b[256];
+ if (dn_expand(iface->search, iface->search + iface->search_len,
+ iface->search, b, sizeof(b)) > 0)
+ fprintf(fp, "\t%s.%s", c->hostname, b);
+
+ fprintf(fp, "\t%s\n", c->hostname);
+ md5_hash(ipbuf, strlen(ipbuf), &md5);
+ md5_hash(c->hostname, strlen(c->hostname), &md5);
+ }
l += snprintf(leasebuf + l, sizeof(leasebuf) - l, "%s/32 ", ipbuf);
leasebuf[l - 1] = '\n';
fclose(fp);
}
- if (config.dhcp_cb) {
+ uint8_t newmd5[16];
+ md5_end(newmd5, &md5);
+
+ if (config.dhcp_cb && memcmp(newmd5, statemd5, sizeof(newmd5))) {
+ memcpy(statemd5, newmd5, sizeof(statemd5));
char *argv[2] = {config.dhcp_cb, NULL};
if (!vfork()) {
execv(argv[0], argv);
static bool assign_na(struct interface *iface, struct dhcpv6_assignment *assign)
{
- if (iface->ia_addr_len < 1)
+ bool match = false;
+ for (size_t i = 0; i < iface->ia_addr_len; ++i) {
+ if (!iface->ia_addr[i].has_class) {
+ match = true;
+ continue;
+ } else if (assign->classes_cnt) {
+ for (size_t j = 0; j < assign->classes_cnt; ++j)
+ if (assign->classes[j] == iface->ia_addr[i].class)
+ match = true;
+ } else if (assign->all_class) {
+ match = true;
+ }
+ }
+
+ if (!match)
return false;
// Seed RNG with checksum of DUID
if (addr[i].prefix > minprefix)
minprefix = addr[i].prefix;
- addr[i].addr.s6_addr32[2] = 0;
addr[i].addr.s6_addr32[3] = 0;
if (addr[i].preferred < UINT32_MAX - now)
if (addr[i].addr.s6_addr32[0] != iface->ia_addr[i].addr.s6_addr32[0] ||
addr[i].addr.s6_addr32[1] != iface->ia_addr[i].addr.s6_addr32[1] ||
(addr[i].preferred > 0) != (iface->ia_addr[i].preferred > 0) ||
- (addr[i].valid > now + 7200) != (iface->ia_addr[i].valid > now + 7200))
+ (addr[i].valid > (uint32_t)now + 7200) !=
+ (iface->ia_addr[i].valid > (uint32_t)now + 7200))
change = true;
if (change) {
if ((a->length < 128 && a->clid_len > 0) ||
(a->length == 128 && a->clid_len == 0)) {
list_del(&a->head);
+ free(a->classes);
free(a->hostname);
free(a);
}
if (a) {
uint32_t pref = 3600;
uint32_t valid = 3600;
- bool have_non_ula = false;
- for (size_t i = 0; i < iface->ia_addr_len; ++i)
- if ((iface->ia_addr[i].addr.s6_addr[0] & 0xfe) != 0xfc)
- have_non_ula = true;
for (size_t i = 0; i < iface->ia_addr_len; ++i) {
+ bool match = true;
+ if (iface->ia_addr[i].has_class) {
+ match = false;
+ if (a->classes_cnt) {
+ for (size_t j = 0; j < a->classes_cnt; ++j)
+ if (a->classes[j] == iface->ia_addr[i].class)
+ match = true;
+ } else if (a->all_class) {
+ match = true;
+ }
+ }
+
+ if (!match)
+ continue;
+
uint32_t prefix_pref = iface->ia_addr[i].preferred - now;
uint32_t prefix_valid = iface->ia_addr[i].valid - now;
- if (iface->ia_addr[i].prefix > 64 ||
+ if (iface->ia_addr[i].prefix > 96 ||
iface->ia_addr[i].preferred <= (uint32_t)now)
continue;
- // ULA-deprecation compatibility workaround
- if ((iface->ia_addr[i].addr.s6_addr[0] & 0xfe) == 0xfc &&
- a->length == 128 && have_non_ula &&
- iface->deprecate_ula_if_public_avail)
- continue;
-
if (prefix_pref > 86400)
prefix_pref = 86400;
if (prefix_valid > 86400)
prefix_valid = 86400;
+#ifdef DHCPV6_OPT_PREFIX_CLASS
+ struct {
+ uint16_t code;
+ uint16_t length;
+ uint16_t class;
+ } pclass = {htons(DHCPV6_OPT_PREFIX_CLASS),
+ htons(2), htons(iface->ia_addr[i].class)};
+#endif
+
if (a->length < 128) {
struct dhcpv6_ia_prefix p = {
.type = htons(DHCPV6_OPT_IA_PREFIX),
.addr = iface->ia_addr[i].addr
};
p.addr.s6_addr32[1] |= htonl(a->assigned);
+ size_t entrlen = sizeof(p) - 4;
+
+#ifdef DHCPV6_OPT_PREFIX_CLASS
+ if (iface->ia_addr[i].has_class) {
+ entrlen += sizeof(pclass);
+ p.len = htons(entrlen);
+ }
+#endif
- if (datalen + sizeof(p) > buflen || a->assigned == 0)
+ if (datalen + entrlen + 4 > buflen || a->assigned == 0)
continue;
memcpy(buf + datalen, &p, sizeof(p));
- datalen += sizeof(p);
+#ifdef DHCPV6_OPT_PREFIX_CLASS
+ memcpy(buf + datalen + sizeof(p), &pclass, sizeof(pclass));
+#endif
+ datalen += entrlen + 4;
} else {
struct dhcpv6_ia_addr n = {
.type = htons(DHCPV6_OPT_IA_ADDR),
.valid = htonl(prefix_valid)
};
n.addr.s6_addr32[3] = htonl(a->assigned);
+ size_t entrlen = sizeof(n) - 4;
- if (datalen + sizeof(n) > buflen || a->assigned == 0)
+#ifdef DHCPV6_OPT_PREFIX_CLASS
+ if (iface->ia_addr[i].has_class) {
+ entrlen += sizeof(pclass);
+ n.len = htons(entrlen);
+ }
+#endif
+
+ if (datalen + entrlen + 4 > buflen || a->assigned == 0)
continue;
memcpy(buf + datalen, &n, sizeof(n));
- datalen += sizeof(n);
+#ifdef DHCPV6_OPT_PREFIX_CLASS
+ memcpy(buf + datalen + sizeof(n), &pclass, sizeof(pclass));
+#endif
+ datalen += entrlen + 4;
}
// Calculate T1 / T2 based on non-deprecated addresses
bool found = false;
if (a) {
for (size_t i = 0; i < iface->ia_addr_len; ++i) {
- if (iface->ia_addr[i].prefix > 64 ||
+ if (iface->ia_addr[i].prefix > 96 ||
iface->ia_addr[i].preferred <= (uint32_t)now)
continue;
uint8_t *clid_data = NULL, clid_len = 0, mac[6] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
char hostname[256];
size_t hostname_len = 0;
+ bool class_oro = false;
dhcpv6_for_each_option(start, end, otype, olen, odata) {
if (otype == DHCPV6_OPT_CLIENTID) {
clid_data = odata;
if (dn_expand(&fqdn_buf[1], &fqdn_buf[olen], &fqdn_buf[1], hostname, sizeof(hostname)) > 0)
hostname_len = strcspn(hostname, ".");
+ } else if (otype == DHCPV6_OPT_ORO) {
+#ifdef DHCPV6_OPT_PREFIX_CLASS
+ for (size_t i = 0; i + 1 < olen; i += 2) {
+ if (odata[i] == (DHCPV6_OPT_PREFIX_CLASS >> 8) &&
+ odata[i + 1] == (DHCPV6_OPT_PREFIX_CLASS & 0xff))
+ class_oro = true;
+ }
+#endif
} else if (otype == DHCPV6_OPT_RECONF_ACCEPT) {
accept_reconf = true;
}
uint8_t reqlen = (is_pd) ? 62 : 128;
uint32_t reqhint = 0;
+ const uint8_t classes_max = 32;
+ uint8_t classes_cnt = 0;
+ uint16_t classes[classes_max];
+
// Parse request hint for IA-PD
if (is_pd) {
uint8_t *sdata;
uint16_t stype, slen;
dhcpv6_for_each_option(&ia[1], odata + olen, stype, slen, sdata) {
- if (stype == DHCPV6_OPT_IA_PREFIX && slen >= sizeof(struct dhcpv6_ia_prefix) - 4) {
- struct dhcpv6_ia_prefix *p = (struct dhcpv6_ia_prefix*)&sdata[-4];
- if (p->prefix) {
- reqlen = p->prefix;
- reqhint = ntohl(p->addr.s6_addr32[1]);
- if (reqlen > 32 && reqlen <= 64)
- reqhint &= (1U << (64 - reqlen)) - 1;
- }
- break;
+ if (stype != DHCPV6_OPT_IA_PREFIX || slen < sizeof(struct dhcpv6_ia_prefix) - 4)
+ continue;
+
+ struct dhcpv6_ia_prefix *p = (struct dhcpv6_ia_prefix*)&sdata[-4];
+ if (p->prefix) {
+ reqlen = p->prefix;
+ reqhint = ntohl(p->addr.s6_addr32[1]);
+ if (reqlen > 32 && reqlen <= 64)
+ reqhint &= (1U << (64 - reqlen)) - 1;
}
+
+#ifdef DHCPV6_OPT_PREFIX_CLASS
+ uint8_t *xdata;
+ uint16_t xtype, xlen;
+ dhcpv6_for_each_option(&p[1], sdata + slen, xtype, xlen, xdata) {
+ if (xtype != DHCPV6_OPT_PREFIX_CLASS || xlen != 2)
+ continue;
+
+ if (classes_cnt >= classes_max)
+ continue;
+
+ classes[classes_cnt++] = (uint16_t)xdata[0] << 8 | (uint16_t)xdata[1];
+ }
+#endif
}
if (reqlen > 64)
reqlen = 64;
+ } else if (is_na) {
+ uint8_t *sdata;
+ uint16_t stype, slen;
+ dhcpv6_for_each_option(&ia[1], odata + olen, stype, slen, sdata) {
+ if (stype != DHCPV6_OPT_IA_ADDR || slen < sizeof(struct dhcpv6_ia_addr) - 4)
+ continue;
+
+#ifdef DHCPV6_OPT_PREFIX_CLASS
+ uint8_t *xdata;
+ uint16_t xtype, xlen;
+ struct dhcpv6_ia_addr *p = (struct dhcpv6_ia_addr*)&sdata[-4];
+ dhcpv6_for_each_option(&p[1], sdata + slen, xtype, xlen, xdata) {
+ if (xtype != DHCPV6_OPT_PREFIX_CLASS || xlen != 2)
+ continue;
+
+ if (classes_cnt >= classes_max)
+ continue;
+
+ classes[classes_cnt++] = (uint16_t)xdata[0] << 8 | (uint16_t)xdata[1];
+ }
+#endif
+ }
}
// Find assignment
a->peer = *addr;
a->reconf_cnt = 0;
a->reconf_sent = 0;
+ a->all_class = class_oro;
+ a->classes_cnt = classes_cnt;
+ a->classes = realloc(a->classes, classes_cnt * sizeof(uint16_t));
+ if (a->classes)
+ memcpy(a->classes, classes, classes_cnt * sizeof(uint16_t));
break;
}
}
if (!a && !iface->no_dynamic_dhcp) { // Create new binding
a = calloc(1, sizeof(*a) + clid_len);
- a->clid_len = clid_len;
- a->iaid = ia->iaid;
- a->length = reqlen;
- a->peer = *addr;
- a->assigned = reqhint;
- if (first)
- memcpy(a->key, first->key, sizeof(a->key));
- else
- odhcpd_urandom(a->key, sizeof(a->key));
- memcpy(a->clid_data, clid_data, clid_len);
+ if (a) {
+ a->clid_len = clid_len;
+ a->iaid = ia->iaid;
+ a->length = reqlen;
+ a->peer = *addr;
+ a->assigned = reqhint;
+ a->all_class = class_oro;
+ a->classes_cnt = classes_cnt;
+ if (classes_cnt) {
+ a->classes = malloc(classes_cnt * sizeof(uint16_t));
+ if (a->classes)
+ memcpy(a->classes, classes, classes_cnt * sizeof(uint16_t));
+ }
+
+ if (first)
+ memcpy(a->key, first->key, sizeof(a->key));
+ else
+ odhcpd_urandom(a->key, sizeof(a->key));
+ memcpy(a->clid_data, clid_data, clid_len);
- if (is_pd)
- while (!(assigned = assign_pd(iface, a)) && ++a->length <= 64);
- else
- assigned = assign_na(iface, a);
+ if (is_pd)
+ while (!(assigned = assign_pd(iface, a)) && ++a->length <= 64);
+ else
+ assigned = assign_na(iface, a);
+ }
}
if (!assigned || iface->ia_addr_len == 0) { // Set error status
} else if (assigned && hdr->msg_type == DHCPV6_MSG_REQUEST) {
if (hostname_len > 0) {
a->hostname = realloc(a->hostname, hostname_len + 1);
- memcpy(a->hostname, hostname, hostname_len);
- a->hostname[hostname_len] = 0;
+ if (a->hostname) {
+ memcpy(a->hostname, hostname, hostname_len);
+ a->hostname[hostname_len] = 0;
+ }
}
a->accept_reconf = accept_reconf;
apply_lease(iface, a, true);
update_state = true;
} else if (!assigned && a) { // Cleanup failed assignment
+ free(a->classes);
free(a->hostname);
free(a);
}
projects / project / odhcpd.git / blobdiff