#include "macro.h"
#include "alloc-util.h"
+#include "dns-domain.h"
#include "fd-util.h"
#include "icmp6-util.h"
#include "in-addr-util.h"
#include "radv-internal.h"
#include "socket-util.h"
#include "string-util.h"
+#include "strv.h"
#include "util.h"
#include "random-util.h"
ra->timeout_event_source =
sd_event_source_unref(ra->timeout_event_source);
+ ra->recv_event_source =
+ sd_event_source_unref(ra->recv_event_source);
+
ra->ra_sent = 0;
}
sd_radv_prefix_unref(p);
}
+ free(ra->rdnss);
+ free(ra->dnssl);
+
radv_reset(ra);
sd_radv_detach_event(ra);
.nd_opt_mtu_type = ND_OPT_MTU,
.nd_opt_mtu_len = 1,
};
- /* Reserve iov space for RA header, linkaddr, MTU + N prefixes */
- struct iovec iov[3 + ra->n_prefixes];
+ /* Reserve iov space for RA header, linkaddr, MTU, N prefixes, RDNSS
+ and DNSSL */
+ struct iovec iov[5 + ra->n_prefixes];
struct msghdr msg = {
.msg_name = &dst_addr,
.msg_namelen = sizeof(dst_addr),
.msg_iov = iov,
};
- if (dst)
+ if (dst && !in_addr_is_null(AF_INET6, (union in_addr_union*) dst))
dst_addr.sin6_addr = *dst;
+
adv.nd_ra_type = ND_ROUTER_ADVERT;
adv.nd_ra_curhoplimit = ra->hop_limit;
adv.nd_ra_flags_reserved = ra->flags;
msg.msg_iovlen++;
}
+ if (ra->rdnss) {
+ iov[msg.msg_iovlen].iov_base = ra->rdnss;
+ iov[msg.msg_iovlen].iov_len = ra->rdnss->length * 8;
+ msg.msg_iovlen++;
+ }
+
+ if (ra->dnssl) {
+ iov[msg.msg_iovlen].iov_base = ra->dnssl;
+ iov[msg.msg_iovlen].iov_len = ra->dnssl->length * 8;
+ msg.msg_iovlen++;
+ }
+
if (sendmsg(ra->fd, &msg, 0) < 0)
return -errno;
return 0;
}
+static int radv_recv(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
+ sd_radv *ra = userdata;
+ _cleanup_free_ char *addr = NULL;
+ struct in6_addr src;
+ triple_timestamp timestamp;
+ int r;
+ ssize_t buflen;
+ _cleanup_free_ char *buf = NULL;
+
+ assert(s);
+ assert(ra);
+ assert(ra->event);
+
+ buflen = next_datagram_size_fd(fd);
+
+ if ((unsigned) buflen < sizeof(struct nd_router_solicit))
+ return log_radv("Too short packet received");
+
+ buf = new0(char, buflen);
+ if (!buf)
+ return 0;
+
+ r = icmp6_receive(fd, buf, buflen, &src, ×tamp);
+ if (r < 0) {
+ switch (r) {
+ case -EADDRNOTAVAIL:
+ (void) in_addr_to_string(AF_INET6, (union in_addr_union*) &src, &addr);
+ log_radv("Received RS from non-link-local address %s. Ignoring", addr);
+ break;
+
+ case -EMULTIHOP:
+ log_radv("Received RS with invalid hop limit. Ignoring.");
+ break;
+
+ case -EPFNOSUPPORT:
+ log_radv("Received invalid source address from ICMPv6 socket. Ignoring.");
+ break;
+
+ default:
+ log_radv_warning_errno(r, "Error receiving from ICMPv6 socket: %m");
+ break;
+ }
+
+ return 0;
+ }
+
+ (void) in_addr_to_string(AF_INET6, (union in_addr_union*) &src, &addr);
+
+ r = radv_send(ra, &src, ra->lifetime);
+ if (r < 0)
+ log_radv_warning_errno(r, "Unable to send solicited Router Advertisment to %s: %m", addr);
+ else
+ log_radv("Sent solicited Router Advertisement to %s", addr);
+
+ return 0;
+}
+
static usec_t radv_compute_timeout(usec_t min, usec_t max) {
assert_return(min <= max, SD_RADV_DEFAULT_MIN_TIMEOUT_USEC);
goto fail;
ra->fd = r;
- r = 0;
+
+ r = sd_event_add_io(ra->event, &ra->recv_event_source, ra->fd, EPOLLIN, radv_recv, ra);
+ if (r < 0)
+ goto fail;
+
+ r = sd_event_source_set_priority(ra->recv_event_source, ra->event_priority);
+ if (r < 0)
+ goto fail;
+
+ (void) sd_event_source_set_description(ra->recv_event_source, "radv-receive-message");
ra->state = SD_RADV_STATE_ADVERTISING;
return 0;
}
+_public_ int sd_radv_set_rdnss(sd_radv *ra, uint32_t lifetime,
+ const struct in6_addr *dns, size_t n_dns) {
+ _cleanup_free_ struct sd_radv_opt_dns *opt_rdnss = NULL;
+ size_t len;
+
+ assert_return(ra, -EINVAL);
+ assert_return(n_dns < 128, -EINVAL);
+
+ if (!dns || n_dns == 0) {
+ ra->rdnss = mfree(ra->rdnss);
+ ra->n_rdnss = 0;
+
+ return 0;
+ }
+
+ len = sizeof(struct sd_radv_opt_dns) + sizeof(struct in6_addr) * n_dns;
+
+ opt_rdnss = malloc0(len);
+ if (!opt_rdnss)
+ return -ENOMEM;
+
+ opt_rdnss->type = SD_RADV_OPT_RDNSS;
+ opt_rdnss->length = len / 8;
+ opt_rdnss->lifetime = htobe32(lifetime);
+
+ memcpy(opt_rdnss + 1, dns, n_dns * sizeof(struct in6_addr));
+
+ free(ra->rdnss);
+ ra->rdnss = opt_rdnss;
+ opt_rdnss = NULL;
+
+ ra->n_rdnss = n_dns;
+
+ return 0;
+}
+
+_public_ int sd_radv_set_dnssl(sd_radv *ra, uint32_t lifetime,
+ char **search_list) {
+ _cleanup_free_ struct sd_radv_opt_dns *opt_dnssl = NULL;
+ size_t len = 0;
+ char **s;
+ uint8_t *p;
+
+ assert_return(ra, -EINVAL);
+
+ if (!search_list || *search_list == NULL) {
+ ra->dnssl = mfree(ra->dnssl);
+
+ return 0;
+ }
+
+ STRV_FOREACH(s, search_list)
+ len += strlen(*s) + 2;
+
+ len = (sizeof(struct sd_radv_opt_dns) + len + 7) & ~0x7;
+
+ opt_dnssl = malloc0(len);
+ if (!opt_dnssl)
+ return -ENOMEM;
+
+ opt_dnssl->type = SD_RADV_OPT_DNSSL;
+ opt_dnssl->length = len / 8;
+ opt_dnssl->lifetime = htobe32(lifetime);
+
+ p = (uint8_t *)(opt_dnssl + 1);
+ len -= sizeof(struct sd_radv_opt_dns);
+
+ STRV_FOREACH(s, search_list) {
+ int r;
+
+ r = dns_name_to_wire_format(*s, p, len, false);
+ if (r < 0)
+ return r;
+
+ if (len < (size_t)r)
+ return -ENOBUFS;
+
+ p += r;
+ len -= r;
+ }
+
+ free(ra->dnssl);
+ ra->dnssl = opt_dnssl;
+ opt_dnssl = NULL;
+
+ return 0;
+}
+
_public_ int sd_radv_prefix_new(sd_radv_prefix **ret) {
_cleanup_(sd_radv_prefix_unrefp) sd_radv_prefix *p = NULL;
projects / thirdparty / systemd.git / blobdiff