***/
#include <netinet/icmp6.h>
+#include <netinet/in.h>
#include <netinet/ip6.h>
-#include <string.h>
#include <stdbool.h>
-#include <netinet/in.h>
+#include <string.h>
#include <sys/ioctl.h>
+#include "sd-ndisc.h"
+
#include "async.h"
+#include "icmp6-util.h"
#include "list.h"
#include "socket-util.h"
-#include "icmp6-util.h"
-#include "sd-ndisc.h"
+#define NDISC_ROUTER_SOLICITATION_INTERVAL 4 * USEC_PER_SEC
+#define NDISC_MAX_ROUTER_SOLICITATIONS 3
-#define ICMP6_ROUTER_SOLICITATION_INTERVAL 4 * USEC_PER_SEC
-#define ICMP6_MAX_ROUTER_SOLICITATIONS 3
-
-enum icmp6_nd_state {
- ICMP6_NEIGHBOR_DISCOVERY_IDLE = 0,
- ICMP6_ROUTER_SOLICITATION_SENT = 10,
- ICMP6_ROUTER_ADVERTISMENT_LISTEN = 11,
+enum NDiscState {
+ NDISC_STATE_IDLE,
+ NDISC_STATE_SOLICITATION_SENT,
+ NDISC_STATE_ADVERTISMENT_LISTEN,
+ _NDISC_STATE_MAX,
+ _NDISC_STATE_INVALID = -1,
};
#define IP6_MIN_MTU (unsigned)1280
-#define ICMP6_ND_RECV_SIZE (IP6_MIN_MTU - sizeof(struct ip6_hdr))
-#define ICMP6_OPT_LEN_UNITS 8
+#define ICMP6_RECV_SIZE (IP6_MIN_MTU - sizeof(struct ip6_hdr))
+#define NDISC_OPT_LEN_UNITS 8
-typedef struct ICMP6Prefix ICMP6Prefix;
+typedef struct NDiscPrefix NDiscPrefix;
-struct ICMP6Prefix {
+struct NDiscPrefix {
unsigned n_ref;
- LIST_FIELDS(ICMP6Prefix, prefixes);
+ sd_ndisc *nd;
+
+ LIST_FIELDS(NDiscPrefix, prefixes);
uint8_t len;
- sd_event_source *timeout_valid;
+ usec_t valid_until;
struct in6_addr addr;
};
struct sd_ndisc {
unsigned n_ref;
- enum icmp6_nd_state state;
+ enum NDiscState state;
sd_event *event;
int event_priority;
int index;
struct ether_addr mac_addr;
uint32_t mtu;
- ICMP6Prefix *expired_prefix;
- LIST_HEAD(ICMP6Prefix, prefixes);
+ LIST_HEAD(NDiscPrefix, prefixes);
int fd;
sd_event_source *recv;
sd_event_source *timeout;
void *userdata;
};
-#define log_icmp6_nd(p, fmt, ...) log_internal(LOG_DEBUG, 0, __FILE__, __LINE__, __func__, "ICMPv6 CLIENT: " fmt, ##__VA_ARGS__)
+#define log_ndisc(p, fmt, ...) log_internal(LOG_DEBUG, 0, __FILE__, __LINE__, __func__, "NDisc CLIENT: " fmt, ##__VA_ARGS__)
-static ICMP6Prefix *icmp6_prefix_unref(ICMP6Prefix *prefix) {
+static NDiscPrefix *ndisc_prefix_unref(NDiscPrefix *prefix) {
if (!prefix)
return NULL;
if (prefix->n_ref > 0)
return NULL;
- prefix->timeout_valid = sd_event_source_unref(prefix->timeout_valid);
+ if (prefix->nd)
+ LIST_REMOVE(prefixes, prefix->nd->prefixes, prefix);
+
free(prefix);
+
return NULL;
}
-static int icmp6_prefix_new(ICMP6Prefix **ret) {
- _cleanup_free_ ICMP6Prefix *prefix = NULL;
+static int ndisc_prefix_new(sd_ndisc *nd, NDiscPrefix **ret) {
+ _cleanup_free_ NDiscPrefix *prefix = NULL;
assert(ret);
- prefix = new0(ICMP6Prefix, 1);
+ prefix = new0(NDiscPrefix, 1);
if (!prefix)
return -ENOMEM;
prefix->n_ref = 1;
LIST_INIT(prefixes, prefix);
+ prefix->nd = nd;
*ret = prefix;
prefix = NULL;
return 0;
}
-static void icmp6_nd_notify(sd_ndisc *nd, int event) {
+static void ndisc_notify(sd_ndisc *nd, int event) {
if (nd->callback)
nd->callback(nd, event, nd->userdata);
}
return nd;
}
-static int icmp6_nd_init(sd_ndisc *nd) {
+static int ndisc_init(sd_ndisc *nd) {
assert(nd);
nd->recv = sd_event_source_unref(nd->recv);
}
sd_ndisc *sd_ndisc_unref(sd_ndisc *nd) {
- ICMP6Prefix *prefix, *p;
+ NDiscPrefix *prefix, *p;
if (!nd)
return NULL;
if (nd->n_ref > 0)
return NULL;
- icmp6_nd_init(nd);
+ ndisc_init(nd);
sd_ndisc_detach_event(nd);
- LIST_FOREACH_SAFE(prefixes, prefix, p, nd->prefixes) {
- LIST_REMOVE(prefixes, nd->prefixes, prefix);
-
- prefix = icmp6_prefix_unref(prefix);
- }
+ LIST_FOREACH_SAFE(prefixes, prefix, p, nd->prefixes)
+ prefix = ndisc_prefix_unref(prefix);
free(nd);
return 0;
}
-static int icmp6_ra_prefix_timeout(sd_event_source *s, uint64_t usec,
- void *userdata) {
- sd_ndisc *nd = userdata;
- ICMP6Prefix *prefix, *p;
-
- assert(nd);
-
- LIST_FOREACH_SAFE(prefixes, prefix, p, nd->prefixes) {
- if (prefix->timeout_valid != s)
- continue;
-
- log_icmp6_nd(nd, "Prefix expired "SD_NDISC_ADDRESS_FORMAT_STR"/%d",
- SD_NDISC_ADDRESS_FORMAT_VAL(prefix->addr),
- prefix->len);
-
- LIST_REMOVE(prefixes, nd->prefixes, prefix);
-
- nd->expired_prefix = prefix;
- icmp6_nd_notify(nd,
- SD_NDISC_EVENT_ROUTER_ADVERTISMENT_PREFIX_EXPIRED);
- nd->expired_prefix = NULL;
-
- prefix = icmp6_prefix_unref(prefix);
-
- break;
- }
-
- return 0;
-}
-
-static int icmp6_ra_prefix_set_timeout(sd_ndisc *nd,
- ICMP6Prefix *prefix,
- usec_t valid) {
- usec_t time_now;
- int r;
-
- assert_return(prefix, -EINVAL);
-
- r = sd_event_now(nd->event, clock_boottime_or_monotonic(), &time_now);
- if (r < 0)
- return r;
-
- prefix->timeout_valid = sd_event_source_unref(prefix->timeout_valid);
-
- r = sd_event_add_time(nd->event, &prefix->timeout_valid,
- clock_boottime_or_monotonic(), time_now + valid,
- USEC_PER_SEC, icmp6_ra_prefix_timeout, nd);
- if (r < 0)
- goto error;
-
- r = sd_event_source_set_priority(prefix->timeout_valid,
- nd->event_priority);
- if (r < 0)
- goto error;
-
- r = sd_event_source_set_description(prefix->timeout_valid,
- "icmp6-prefix-timeout");
-
-error:
- if (r < 0)
- prefix->timeout_valid =
- sd_event_source_unref(prefix->timeout_valid);
-
- return r;
-}
-
-static int icmp6_prefix_match(const struct in6_addr *prefix, uint8_t prefixlen,
- const struct in6_addr *addr,
- uint8_t addr_prefixlen) {
+static int prefix_match(const struct in6_addr *prefix, uint8_t prefixlen,
+ const struct in6_addr *addr,
+ uint8_t addr_prefixlen) {
uint8_t bytes, mask, len;
assert_return(prefix, -EINVAL);
return 0;
}
-static int icmp6_ra_prefix_match(ICMP6Prefix *head, const struct in6_addr *addr,
- uint8_t addr_len, ICMP6Prefix **result) {
- ICMP6Prefix *prefix;
-
- LIST_FOREACH(prefixes, prefix, head) {
- if (icmp6_prefix_match(&prefix->addr, prefix->len, addr,
- addr_len) >= 0) {
- *result = prefix;
- return 0;
- }
- }
-
- return -EADDRNOTAVAIL;
-}
-
-int sd_ndisc_prefix_match(struct in6_addr *prefix, uint8_t prefixlen,
- struct in6_addr *addr) {
- return icmp6_prefix_match(prefix, prefixlen, addr,
- sizeof(addr->s6_addr) * 8);
-}
-
-int sd_ndisc_get_prefixlen(sd_ndisc *nd, const struct in6_addr *addr,
- uint8_t *prefixlen) {
+static int ndisc_prefix_match(sd_ndisc *nd, const struct in6_addr *addr,
+ uint8_t addr_len, NDiscPrefix **result) {
+ NDiscPrefix *prefix, *p;
+ usec_t time_now;
int r;
- ICMP6Prefix *prefix;
- assert_return(nd, -EINVAL);
- assert_return(addr, -EINVAL);
- assert_return(prefixlen, -EINVAL);
+ assert(nd);
- r = icmp6_ra_prefix_match(nd->prefixes, addr,
- sizeof(addr->s6_addr) * 8, &prefix);
+ r = sd_event_now(nd->event, clock_boottime_or_monotonic(), &time_now);
if (r < 0)
return r;
- *prefixlen = prefix->len;
-
- return 0;
-}
-
-int sd_ndisc_get_expired_prefix(sd_ndisc *nd, struct in6_addr **addr, uint8_t *prefixlen) {
- assert_return(nd, -EINVAL);
- assert_return(addr, -EINVAL);
- assert_return(prefixlen, -EINVAL);
+ LIST_FOREACH_SAFE(prefixes, prefix, p, nd->prefixes) {
+ if (prefix->valid_until < time_now) {
+ prefix = ndisc_prefix_unref(prefix);
- if (!nd->expired_prefix)
- return -EADDRNOTAVAIL;
+ continue;
+ }
- *addr = &nd->expired_prefix->addr;
- *prefixlen = nd->expired_prefix->len;
+ if (prefix_match(&prefix->addr, prefix->len, addr, addr_len) >= 0) {
+ *result = prefix;
+ return 0;
+ }
+ }
- return 0;
+ return -EADDRNOTAVAIL;
}
-static int icmp6_ra_prefix_update(sd_ndisc *nd, ssize_t len,
- const struct nd_opt_prefix_info *prefix_opt) {
- int r;
- ICMP6Prefix *prefix;
+static int ndisc_prefix_update(sd_ndisc *nd, ssize_t len,
+ const struct nd_opt_prefix_info *prefix_opt) {
+ NDiscPrefix *prefix;
uint32_t lifetime;
+ usec_t time_now;
char time_string[FORMAT_TIMESPAN_MAX];
+ int r;
- assert_return(nd, -EINVAL);
- assert_return(prefix_opt, -EINVAL);
+ assert(nd);
+ assert(prefix_opt);
if (len < prefix_opt->nd_opt_pi_len)
return -ENOMSG;
lifetime = be32toh(prefix_opt->nd_opt_pi_valid_time);
- r = icmp6_ra_prefix_match(nd->prefixes,
- &prefix_opt->nd_opt_pi_prefix,
- prefix_opt->nd_opt_pi_prefix_len, &prefix);
+ r = ndisc_prefix_match(nd, &prefix_opt->nd_opt_pi_prefix,
+ prefix_opt->nd_opt_pi_prefix_len, &prefix);
if (r < 0 && r != -EADDRNOTAVAIL)
return r;
callback will be called immediately to clean up the prefix */
if (r == -EADDRNOTAVAIL) {
- r = icmp6_prefix_new(&prefix);
+ r = ndisc_prefix_new(nd, &prefix);
if (r < 0)
return r;
memcpy(&prefix->addr, &prefix_opt->nd_opt_pi_prefix,
sizeof(prefix->addr));
- log_icmp6_nd(nd, "New prefix "SD_NDISC_ADDRESS_FORMAT_STR"/%d lifetime %d expires in %s",
+ log_ndisc(nd, "New prefix "SD_NDISC_ADDRESS_FORMAT_STR"/%d lifetime %d expires in %s",
SD_NDISC_ADDRESS_FORMAT_VAL(prefix->addr),
prefix->len, lifetime,
format_timespan(time_string, FORMAT_TIMESPAN_MAX, lifetime * USEC_PER_SEC, USEC_PER_SEC));
prefixlen = MIN(prefix->len, prefix_opt->nd_opt_pi_prefix_len);
- log_icmp6_nd(nd, "Prefix length mismatch %d/%d using %d",
+ log_ndisc(nd, "Prefix length mismatch %d/%d using %d",
prefix->len,
prefix_opt->nd_opt_pi_prefix_len,
prefixlen);
prefix->len = prefixlen;
}
- log_icmp6_nd(nd, "Update prefix "SD_NDISC_ADDRESS_FORMAT_STR"/%d lifetime %d expires in %s",
+ log_ndisc(nd, "Update prefix "SD_NDISC_ADDRESS_FORMAT_STR"/%d lifetime %d expires in %s",
SD_NDISC_ADDRESS_FORMAT_VAL(prefix->addr),
prefix->len, lifetime,
format_timespan(time_string, FORMAT_TIMESPAN_MAX, lifetime * USEC_PER_SEC, USEC_PER_SEC));
}
- r = icmp6_ra_prefix_set_timeout(nd, prefix, lifetime * USEC_PER_SEC);
+ r = sd_event_now(nd->event, clock_boottime_or_monotonic(), &time_now);
+ if (r < 0)
+ return r;
+
+ prefix->valid_until = time_now + lifetime * USEC_PER_SEC;
return r;
}
-static int icmp6_ra_parse(sd_ndisc *nd, struct nd_router_advert *ra,
+static int ndisc_ra_parse(sd_ndisc *nd, struct nd_router_advert *ra,
ssize_t len) {
void *opt;
struct nd_opt_hdr *opt_hdr;
assert_return(ra, -EINVAL);
len -= sizeof(*ra);
- if (len < ICMP6_OPT_LEN_UNITS) {
- log_icmp6_nd(nd, "Router Advertisement below minimum length");
+ if (len < NDISC_OPT_LEN_UNITS) {
+ log_ndisc(nd, "Router Advertisement below minimum length");
return -ENOMSG;
}
opt = ra + 1;
opt_hdr = opt;
- while (len != 0 && len >= opt_hdr->nd_opt_len * ICMP6_OPT_LEN_UNITS) {
+ while (len != 0 && len >= opt_hdr->nd_opt_len * NDISC_OPT_LEN_UNITS) {
struct nd_opt_mtu *opt_mtu;
uint32_t mtu;
struct nd_opt_prefix_info *opt_prefix;
if (mtu != nd->mtu) {
nd->mtu = MAX(mtu, IP6_MIN_MTU);
- log_icmp6_nd(nd, "Router Advertisement link MTU %d using %d",
+ log_ndisc(nd, "Router Advertisement link MTU %d using %d",
mtu, nd->mtu);
}
case ND_OPT_PREFIX_INFORMATION:
opt_prefix = opt;
- icmp6_ra_prefix_update(nd, len, opt_prefix);
+ ndisc_prefix_update(nd, len, opt_prefix);
break;
}
- len -= opt_hdr->nd_opt_len * ICMP6_OPT_LEN_UNITS;
+ len -= opt_hdr->nd_opt_len * NDISC_OPT_LEN_UNITS;
opt = (void *)((char *)opt +
- opt_hdr->nd_opt_len * ICMP6_OPT_LEN_UNITS);
+ opt_hdr->nd_opt_len * NDISC_OPT_LEN_UNITS);
opt_hdr = opt;
}
if (len > 0)
- log_icmp6_nd(nd, "Router Advertisement contains %zd bytes of trailing garbage", len);
+ log_ndisc(nd, "Router Advertisement contains %zd bytes of trailing garbage", len);
return 0;
}
-static int icmp6_router_advertisment_recv(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
+static int ndisc_router_advertisment_recv(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
sd_ndisc *nd = userdata;
int r, buflen = 0;
ssize_t len;
r = ioctl(fd, FIONREAD, &buflen);
if (r < 0 || buflen <= 0)
- buflen = ICMP6_ND_RECV_SIZE;
+ buflen = ICMP6_RECV_SIZE;
ra = malloc(buflen);
if (!ra)
len = read(fd, ra, buflen);
if (len < 0) {
- log_icmp6_nd(nd, "Could not receive message from UDP socket: %m");
+ log_ndisc(nd, "Could not receive message from UDP socket: %m");
return 0;
}
nd->timeout = sd_event_source_unref(nd->timeout);
- nd->state = ICMP6_ROUTER_ADVERTISMENT_LISTEN;
+ nd->state = NDISC_STATE_ADVERTISMENT_LISTEN;
if (ra->nd_ra_flags_reserved & ND_RA_FLAG_OTHER )
event = SD_NDISC_EVENT_ROUTER_ADVERTISMENT_OTHER;
if (ra->nd_ra_flags_reserved & ND_RA_FLAG_MANAGED)
event = SD_NDISC_EVENT_ROUTER_ADVERTISMENT_MANAGED;
- log_icmp6_nd(nd, "Received Router Advertisement flags %s/%s",
+ log_ndisc(nd, "Received Router Advertisement flags %s/%s",
ra->nd_ra_flags_reserved & ND_RA_FLAG_MANAGED? "MANAGED": "none",
ra->nd_ra_flags_reserved & ND_RA_FLAG_OTHER? "OTHER": "none");
if (event != SD_NDISC_EVENT_ROUTER_ADVERTISMENT_NONE) {
- r = icmp6_ra_parse(nd, ra, len);
+ r = ndisc_ra_parse(nd, ra, len);
if (r < 0) {
- log_icmp6_nd(nd, "Could not parse Router Advertisement: %s",
+ log_ndisc(nd, "Could not parse Router Advertisement: %s",
strerror(-r));
return 0;
}
}
- icmp6_nd_notify(nd, event);
+ ndisc_notify(nd, event);
return 0;
}
-static int icmp6_router_solicitation_timeout(sd_event_source *s, uint64_t usec, void *userdata) {
+static int ndisc_router_solicitation_timeout(sd_event_source *s, uint64_t usec, void *userdata) {
sd_ndisc *nd = userdata;
uint64_t time_now, next_timeout;
struct ether_addr unset = { };
nd->timeout = sd_event_source_unref(nd->timeout);
- if (nd->nd_sent >= ICMP6_MAX_ROUTER_SOLICITATIONS) {
- icmp6_nd_notify(nd, SD_NDISC_EVENT_ROUTER_ADVERTISMENT_TIMEOUT);
- nd->state = ICMP6_ROUTER_ADVERTISMENT_LISTEN;
+ if (nd->nd_sent >= NDISC_MAX_ROUTER_SOLICITATIONS) {
+ ndisc_notify(nd, SD_NDISC_EVENT_ROUTER_ADVERTISMENT_TIMEOUT);
+ nd->state = NDISC_STATE_ADVERTISMENT_LISTEN;
} else {
if (memcmp(&nd->mac_addr, &unset, sizeof(struct ether_addr)))
addr = &nd->mac_addr;
r = icmp6_send_router_solicitation(nd->fd, addr);
if (r < 0)
- log_icmp6_nd(nd, "Error sending Router Solicitation");
+ log_ndisc(nd, "Error sending Router Solicitation");
else {
- nd->state = ICMP6_ROUTER_SOLICITATION_SENT;
- log_icmp6_nd(nd, "Sent Router Solicitation");
+ nd->state = NDISC_STATE_SOLICITATION_SENT;
+ log_ndisc(nd, "Sent Router Solicitation");
}
nd->nd_sent++;
- r = sd_event_now(nd->event, clock_boottime_or_monotonic(), &time_now);
- if (r < 0) {
- icmp6_nd_notify(nd, r);
- return 0;
- }
+ assert_se(sd_event_now(nd->event, clock_boottime_or_monotonic(), &time_now) >= 0);
- next_timeout = time_now + ICMP6_ROUTER_SOLICITATION_INTERVAL;
+ next_timeout = time_now + NDISC_ROUTER_SOLICITATION_INTERVAL;
r = sd_event_add_time(nd->event, &nd->timeout, clock_boottime_or_monotonic(),
next_timeout, 0,
- icmp6_router_solicitation_timeout, nd);
+ ndisc_router_solicitation_timeout, nd);
if (r < 0) {
- icmp6_nd_notify(nd, r);
+ ndisc_notify(nd, r);
return 0;
}
- r = sd_event_source_set_priority(nd->timeout,
- nd->event_priority);
- if (r < 0) {
- icmp6_nd_notify(nd, r);
+ r = sd_event_source_set_priority(nd->timeout, nd->event_priority);
+ if (r < 0)
return 0;
- }
- r = sd_event_source_set_description(nd->timeout, "icmp6-timeout");
- if (r < 0) {
- icmp6_nd_notify(nd, r);
+ r = sd_event_source_set_description(nd->timeout, "ndisc-timeout");
+ if (r < 0)
return 0;
- }
}
return 0;
assert_return(nd, -EINVAL);
assert_return(nd->event, -EINVAL);
- log_icmp6_nd(client, "Stop ICMPv6");
+ log_ndisc(client, "Stop NDisc");
- icmp6_nd_init(nd);
+ ndisc_init(nd);
- nd->state = ICMP6_NEIGHBOR_DISCOVERY_IDLE;
+ nd->state = NDISC_STATE_IDLE;
return 0;
}
assert(nd);
assert(nd->event);
- if (nd->state != ICMP6_NEIGHBOR_DISCOVERY_IDLE)
+ if (nd->state != NDISC_STATE_IDLE)
return -EINVAL;
if (nd->index < 1)
nd->fd = r;
r = sd_event_add_io(nd->event, &nd->recv, nd->fd, EPOLLIN,
- icmp6_router_advertisment_recv, nd);
+ ndisc_router_advertisment_recv, nd);
if (r < 0)
goto error;
if (r < 0)
goto error;
- r = sd_event_source_set_description(nd->recv, "icmp6-receive-message");
+ r = sd_event_source_set_description(nd->recv, "ndisc-receive-message");
if (r < 0)
goto error;
r = sd_event_add_time(nd->event, &nd->timeout, clock_boottime_or_monotonic(),
- 0, 0, icmp6_router_solicitation_timeout, nd);
+ 0, 0, ndisc_router_solicitation_timeout, nd);
if (r < 0)
goto error;
if (r < 0)
goto error;
- r = sd_event_source_set_description(nd->timeout, "icmp6-timeout");
+ r = sd_event_source_set_description(nd->timeout, "ndisc-timeout");
error:
if (r < 0)
- icmp6_nd_init(nd);
+ ndisc_init(nd);
else
- log_icmp6_nd(client, "Start Router Solicitation");
+ log_ndisc(client, "Start Router Solicitation");
return r;
}
projects / thirdparty / systemd.git / blobdiff