diff options
Diffstat (limited to 'src/systemd/src/libsystemd-network/sd-ipv4acd.c')
| -rw-r--r-- | src/systemd/src/libsystemd-network/sd-ipv4acd.c | 505 |
1 files changed, 252 insertions, 253 deletions
diff --git a/src/systemd/src/libsystemd-network/sd-ipv4acd.c b/src/systemd/src/libsystemd-network/sd-ipv4acd.c index 9b5ce7200c..598307951f 100644 --- a/src/systemd/src/libsystemd-network/sd-ipv4acd.c +++ b/src/systemd/src/libsystemd-network/sd-ipv4acd.c @@ -30,45 +30,30 @@ #include "alloc-util.h" #include "arp-util.h" +#include "ether-addr-util.h" #include "fd-util.h" #include "in-addr-util.h" #include "list.h" #include "random-util.h" -#include "refcnt.h" #include "siphash24.h" +#include "string-util.h" #include "util.h" /* Constants from the RFC */ -#define PROBE_WAIT 1 -#define PROBE_NUM 3 -#define PROBE_MIN 1 -#define PROBE_MAX 2 -#define ANNOUNCE_WAIT 2 -#define ANNOUNCE_NUM 2 -#define ANNOUNCE_INTERVAL 2 -#define MAX_CONFLICTS 10 -#define RATE_LIMIT_INTERVAL 60 -#define DEFEND_INTERVAL 10 - -#define IPV4ACD_NETWORK 0xA9FE0000L -#define IPV4ACD_NETMASK 0xFFFF0000L - -#define log_ipv4acd_full(ll, level, error, fmt, ...) log_internal(level, error, __FILE__, __LINE__, __func__, "ACD: " fmt, ##__VA_ARGS__) - -#define log_ipv4acd_debug(ll, ...) log_ipv4acd_full(ll, LOG_DEBUG, 0, ##__VA_ARGS__) -#define log_ipv4acd_info(ll, ...) log_ipv4acd_full(ll, LOG_INFO, 0, ##__VA_ARGS__) -#define log_ipv4acd_notice(ll, ...) log_ipv4acd_full(ll, LOG_NOTICE, 0, ##__VA_ARGS__) -#define log_ipv4acd_warning(ll, ...) log_ipv4acd_full(ll, LOG_WARNING, 0, ##__VA_ARGS__) -#define log_ipv4acd_error(ll, ...) log_ipv4acd_full(ll, LOG_ERR, 0, ##__VA_ARGS__) - -#define log_ipv4acd_debug_errno(ll, error, ...) log_ipv4acd_full(ll, LOG_DEBUG, error, ##__VA_ARGS__) -#define log_ipv4acd_info_errno(ll, error, ...) log_ipv4acd_full(ll, LOG_INFO, error, ##__VA_ARGS__) -#define log_ipv4acd_notice_errno(ll, error, ...) log_ipv4acd_full(ll, LOG_NOTICE, error, ##__VA_ARGS__) -#define log_ipv4acd_warning_errno(ll, error, ...) log_ipv4acd_full(ll, LOG_WARNING, error, ##__VA_ARGS__) -#define log_ipv4acd_error_errno(ll, error, ...) log_ipv4acd_full(ll, LOG_ERR, error, ##__VA_ARGS__) +#define PROBE_WAIT_USEC (1U * USEC_PER_SEC) +#define PROBE_NUM 3U +#define PROBE_MIN_USEC (1U * USEC_PER_SEC) +#define PROBE_MAX_USEC (2U * USEC_PER_SEC) +#define ANNOUNCE_WAIT_USEC (2U * USEC_PER_SEC) +#define ANNOUNCE_NUM 2U +#define ANNOUNCE_INTERVAL_USEC (2U * USEC_PER_SEC) +#define MAX_CONFLICTS 10U +#define RATE_LIMIT_INTERVAL_USEC (60U * USEC_PER_SEC) +#define DEFEND_INTERVAL_USEC (10U * USEC_PER_SEC) typedef enum IPv4ACDState { IPV4ACD_STATE_INIT, + IPV4ACD_STATE_STARTED, IPV4ACD_STATE_WAITING_PROBE, IPV4ACD_STATE_PROBING, IPV4ACD_STATE_WAITING_ANNOUNCE, @@ -79,156 +64,164 @@ typedef enum IPv4ACDState { } IPv4ACDState; struct sd_ipv4acd { - RefCount n_ref; + unsigned n_ref; IPv4ACDState state; - int index; + int ifindex; int fd; - int iteration; - int conflict; - sd_event_source *receive_message; - sd_event_source *timer; + + unsigned n_iteration; + unsigned n_conflict; + + sd_event_source *receive_message_event_source; + sd_event_source *timer_event_source; + usec_t defend_window; be32_t address; + /* External */ struct ether_addr mac_addr; + sd_event *event; int event_priority; - sd_ipv4acd_callback_t cb; + sd_ipv4acd_callback_t callback; void* userdata; }; -sd_ipv4acd *sd_ipv4acd_ref(sd_ipv4acd *ll) { - if (ll) - assert_se(REFCNT_INC(ll->n_ref) >= 2); +#define log_ipv4acd_errno(acd, error, fmt, ...) log_internal(LOG_DEBUG, error, __FILE__, __LINE__, __func__, "IPV4ACD: " fmt, ##__VA_ARGS__) +#define log_ipv4acd(acd, fmt, ...) log_ipv4acd_errno(acd, 0, fmt, ##__VA_ARGS__) + +static void ipv4acd_set_state(sd_ipv4acd *acd, IPv4ACDState st, bool reset_counter) { + assert(acd); + assert(st < _IPV4ACD_STATE_MAX); + + if (st == acd->state && !reset_counter) + acd->n_iteration++; + else { + acd->state = st; + acd->n_iteration = 0; + } +} + +static void ipv4acd_reset(sd_ipv4acd *acd) { + assert(acd); + + acd->timer_event_source = sd_event_source_unref(acd->timer_event_source); + acd->receive_message_event_source = sd_event_source_unref(acd->receive_message_event_source); + + acd->fd = safe_close(acd->fd); + + ipv4acd_set_state(acd, IPV4ACD_STATE_INIT, true); +} + +sd_ipv4acd *sd_ipv4acd_ref(sd_ipv4acd *acd) { + if (!acd) + return NULL; + + assert_se(acd->n_ref >= 1); + acd->n_ref++; - return ll; + return acd; } -sd_ipv4acd *sd_ipv4acd_unref(sd_ipv4acd *ll) { - if (!ll || REFCNT_DEC(ll->n_ref) > 0) +sd_ipv4acd *sd_ipv4acd_unref(sd_ipv4acd *acd) { + if (!acd) return NULL; - ll->receive_message = sd_event_source_unref(ll->receive_message); - ll->fd = safe_close(ll->fd); + assert_se(acd->n_ref >= 1); + acd->n_ref--; - ll->timer = sd_event_source_unref(ll->timer); + if (acd->n_ref > 0) + return NULL; - sd_ipv4acd_detach_event(ll); + ipv4acd_reset(acd); + sd_ipv4acd_detach_event(acd); - free(ll); + free(acd); return NULL; } int sd_ipv4acd_new(sd_ipv4acd **ret) { - _cleanup_(sd_ipv4acd_unrefp) sd_ipv4acd *ll = NULL; + _cleanup_(sd_ipv4acd_unrefp) sd_ipv4acd *acd = NULL; assert_return(ret, -EINVAL); - ll = new0(sd_ipv4acd, 1); - if (!ll) + acd = new0(sd_ipv4acd, 1); + if (!acd) return -ENOMEM; - ll->n_ref = REFCNT_INIT; - ll->state = IPV4ACD_STATE_INIT; - ll->index = -1; - ll->fd = -1; + acd->n_ref = 1; + acd->state = IPV4ACD_STATE_INIT; + acd->ifindex = -1; + acd->fd = -1; - *ret = ll; - ll = NULL; + *ret = acd; + acd = NULL; return 0; } -static void ipv4acd_set_state(sd_ipv4acd *ll, IPv4ACDState st, bool reset_counter) { - - assert(ll); - assert(st < _IPV4ACD_STATE_MAX); - - if (st == ll->state && !reset_counter) - ll->iteration++; - else { - ll->state = st; - ll->iteration = 0; - } -} +static void ipv4acd_client_notify(sd_ipv4acd *acd, int event) { + assert(acd); -static void ipv4acd_client_notify(sd_ipv4acd *ll, int event) { - assert(ll); + if (!acd->callback) + return; - if (ll->cb) - ll->cb(ll, event, ll->userdata); + acd->callback(acd, event, acd->userdata); } -static void ipv4acd_stop(sd_ipv4acd *ll) { - assert(ll); +int sd_ipv4acd_stop(sd_ipv4acd *acd) { + assert_return(acd, -EINVAL); - ll->receive_message = sd_event_source_unref(ll->receive_message); - ll->fd = safe_close(ll->fd); + ipv4acd_reset(acd); - ll->timer = sd_event_source_unref(ll->timer); + log_ipv4acd(acd, "STOPPED"); - log_ipv4acd_debug(ll, "STOPPED"); - - ipv4acd_set_state (ll, IPV4ACD_STATE_INIT, true); -} - -int sd_ipv4acd_stop(sd_ipv4acd *ll) { - assert_return(ll, -EINVAL); - - ipv4acd_stop(ll); - - ipv4acd_client_notify(ll, SD_IPV4ACD_EVENT_STOP); + ipv4acd_client_notify(acd, SD_IPV4ACD_EVENT_STOP); return 0; } static int ipv4acd_on_timeout(sd_event_source *s, uint64_t usec, void *userdata); -static int ipv4acd_set_next_wakeup(sd_ipv4acd *ll, int sec, int random_sec) { +static int ipv4acd_set_next_wakeup(sd_ipv4acd *acd, usec_t usec, usec_t random_usec) { _cleanup_(sd_event_source_unrefp) sd_event_source *timer = NULL; - usec_t next_timeout; - usec_t time_now; + usec_t next_timeout, time_now; int r; - assert(sec >= 0); - assert(random_sec >= 0); - assert(ll); + assert(acd); - next_timeout = sec * USEC_PER_SEC; + next_timeout = usec; - if (random_sec) - next_timeout += random_u32() % (random_sec * USEC_PER_SEC); + if (random_usec > 0) + next_timeout += (usec_t) random_u64() % random_usec; - assert_se(sd_event_now(ll->event, clock_boottime_or_monotonic(), &time_now) >= 0); + assert_se(sd_event_now(acd->event, clock_boottime_or_monotonic(), &time_now) >= 0); - r = sd_event_add_time(ll->event, &timer, clock_boottime_or_monotonic(), - time_now + next_timeout, 0, ipv4acd_on_timeout, ll); + r = sd_event_add_time(acd->event, &timer, clock_boottime_or_monotonic(), time_now + next_timeout, 0, ipv4acd_on_timeout, acd); if (r < 0) return r; - r = sd_event_source_set_priority(timer, ll->event_priority); + r = sd_event_source_set_priority(timer, acd->event_priority); if (r < 0) return r; - r = sd_event_source_set_description(timer, "ipv4acd-timer"); - if (r < 0) - return r; + (void) sd_event_source_set_description(timer, "ipv4acd-timer"); - ll->timer = sd_event_source_unref(ll->timer); - ll->timer = timer; + sd_event_source_unref(acd->timer_event_source); + acd->timer_event_source = timer; timer = NULL; return 0; } -static bool ipv4acd_arp_conflict(sd_ipv4acd *ll, struct ether_arp *arp) { - assert(ll); +static bool ipv4acd_arp_conflict(sd_ipv4acd *acd, struct ether_arp *arp) { + assert(acd); assert(arp); /* see the BPF */ - if (memcmp(arp->arp_spa, &ll->address, sizeof(ll->address)) == 0) + if (memcmp(arp->arp_spa, &acd->address, sizeof(acd->address)) == 0) return true; /* the TPA matched instead of the SPA, this is not a conflict */ @@ -236,294 +229,300 @@ static bool ipv4acd_arp_conflict(sd_ipv4acd *ll, struct ether_arp *arp) { } static int ipv4acd_on_timeout(sd_event_source *s, uint64_t usec, void *userdata) { - sd_ipv4acd *ll = userdata; + sd_ipv4acd *acd = userdata; int r = 0; - assert(ll); + assert(acd); + + switch (acd->state) { - switch (ll->state) { - case IPV4ACD_STATE_INIT: + case IPV4ACD_STATE_STARTED: + ipv4acd_set_state(acd, IPV4ACD_STATE_WAITING_PROBE, true); - ipv4acd_set_state(ll, IPV4ACD_STATE_WAITING_PROBE, true); + if (acd->n_conflict >= MAX_CONFLICTS) { + char ts[FORMAT_TIMESPAN_MAX]; + log_ipv4acd(acd, "Max conflicts reached, delaying by %s", format_timespan(ts, sizeof(ts), RATE_LIMIT_INTERVAL_USEC, 0)); - if (ll->conflict >= MAX_CONFLICTS) { - log_ipv4acd_notice(ll, "Max conflicts reached, delaying by %us", RATE_LIMIT_INTERVAL); - r = ipv4acd_set_next_wakeup(ll, RATE_LIMIT_INTERVAL, PROBE_WAIT); + r = ipv4acd_set_next_wakeup(acd, RATE_LIMIT_INTERVAL_USEC, PROBE_WAIT_USEC); if (r < 0) - goto out; + goto fail; - ll->conflict = 0; + acd->n_conflict = 0; } else { - r = ipv4acd_set_next_wakeup(ll, 0, PROBE_WAIT); + r = ipv4acd_set_next_wakeup(acd, 0, PROBE_WAIT_USEC); if (r < 0) - goto out; + goto fail; } break; + case IPV4ACD_STATE_WAITING_PROBE: case IPV4ACD_STATE_PROBING: /* Send a probe */ - r = arp_send_probe(ll->fd, ll->index, ll->address, &ll->mac_addr); + r = arp_send_probe(acd->fd, acd->ifindex, acd->address, &acd->mac_addr); if (r < 0) { - log_ipv4acd_error_errno(ll, r, "Failed to send ARP probe: %m"); - goto out; + log_ipv4acd_errno(acd, r, "Failed to send ARP probe: %m"); + goto fail; } else { _cleanup_free_ char *address = NULL; - union in_addr_union addr = { .in.s_addr = ll->address }; + union in_addr_union addr = { .in.s_addr = acd->address }; - r = in_addr_to_string(AF_INET, &addr, &address); - if (r >= 0) - log_ipv4acd_debug(ll, "Probing %s", address); + (void) in_addr_to_string(AF_INET, &addr, &address); + log_ipv4acd(acd, "Probing %s", strna(address)); } - if (ll->iteration < PROBE_NUM - 2) { - ipv4acd_set_state(ll, IPV4ACD_STATE_PROBING, false); + if (acd->n_iteration < PROBE_NUM - 2) { + ipv4acd_set_state(acd, IPV4ACD_STATE_PROBING, false); - r = ipv4acd_set_next_wakeup(ll, PROBE_MIN, (PROBE_MAX-PROBE_MIN)); + r = ipv4acd_set_next_wakeup(acd, PROBE_MIN_USEC, (PROBE_MAX_USEC-PROBE_MIN_USEC)); if (r < 0) - goto out; + goto fail; } else { - ipv4acd_set_state(ll, IPV4ACD_STATE_WAITING_ANNOUNCE, true); + ipv4acd_set_state(acd, IPV4ACD_STATE_WAITING_ANNOUNCE, true); - r = ipv4acd_set_next_wakeup(ll, ANNOUNCE_WAIT, 0); + r = ipv4acd_set_next_wakeup(acd, ANNOUNCE_WAIT_USEC, 0); if (r < 0) - goto out; + goto fail; } break; case IPV4ACD_STATE_ANNOUNCING: - if (ll->iteration >= ANNOUNCE_NUM - 1) { - ipv4acd_set_state(ll, IPV4ACD_STATE_RUNNING, false); - + if (acd->n_iteration >= ANNOUNCE_NUM - 1) { + ipv4acd_set_state(acd, IPV4ACD_STATE_RUNNING, false); break; } + + /* fall through */ + case IPV4ACD_STATE_WAITING_ANNOUNCE: /* Send announcement packet */ - r = arp_send_announcement(ll->fd, ll->index, ll->address, &ll->mac_addr); + r = arp_send_announcement(acd->fd, acd->ifindex, acd->address, &acd->mac_addr); if (r < 0) { - log_ipv4acd_error_errno(ll, r, "Failed to send ARP announcement: %m"); - goto out; + log_ipv4acd_errno(acd, r, "Failed to send ARP announcement: %m"); + goto fail; } else - log_ipv4acd_debug(ll, "ANNOUNCE"); + log_ipv4acd(acd, "ANNOUNCE"); - ipv4acd_set_state(ll, IPV4ACD_STATE_ANNOUNCING, false); + ipv4acd_set_state(acd, IPV4ACD_STATE_ANNOUNCING, false); - r = ipv4acd_set_next_wakeup(ll, ANNOUNCE_INTERVAL, 0); + r = ipv4acd_set_next_wakeup(acd, ANNOUNCE_INTERVAL_USEC, 0); if (r < 0) - goto out; + goto fail; - if (ll->iteration == 0) { - ll->conflict = 0; - ipv4acd_client_notify(ll, SD_IPV4ACD_EVENT_BIND); + if (acd->n_iteration == 0) { + acd->n_conflict = 0; + ipv4acd_client_notify(acd, SD_IPV4ACD_EVENT_BIND); } break; + default: assert_not_reached("Invalid state."); } -out: - if (r < 0) - sd_ipv4acd_stop(ll); + return 0; - return 1; +fail: + sd_ipv4acd_stop(acd); + return 0; } -static void ipv4acd_on_conflict(sd_ipv4acd *ll) { +static void ipv4acd_on_conflict(sd_ipv4acd *acd) { _cleanup_free_ char *address = NULL; - union in_addr_union addr = { .in.s_addr = ll->address }; - int r; + union in_addr_union addr = { .in.s_addr = acd->address }; - assert(ll); + assert(acd); - ll->conflict++; + acd->n_conflict++; - r = in_addr_to_string(AF_INET, &addr, &address); - if (r >= 0) - log_ipv4acd_debug(ll, "Conflict on %s (%u)", address, ll->conflict); + (void) in_addr_to_string(AF_INET, &addr, &address); + log_ipv4acd(acd, "Conflict on %s (%u)", strna(address), acd->n_conflict); - ipv4acd_stop(ll); - - ipv4acd_client_notify(ll, SD_IPV4ACD_EVENT_CONFLICT); + ipv4acd_reset(acd); + ipv4acd_client_notify(acd, SD_IPV4ACD_EVENT_CONFLICT); } -static int ipv4acd_on_packet(sd_event_source *s, int fd, - uint32_t revents, void *userdata) { - sd_ipv4acd *ll = userdata; +static int ipv4acd_on_packet( + sd_event_source *s, + int fd, + uint32_t revents, + void *userdata) { + + sd_ipv4acd *acd = userdata; struct ether_arp packet; + ssize_t n; int r; - assert(ll); + assert(s); + assert(acd); assert(fd >= 0); - r = read(fd, &packet, sizeof(struct ether_arp)); - if (r < (int) sizeof(struct ether_arp)) - goto out; + n = recv(fd, &packet, sizeof(struct ether_arp), 0); + if (n < 0) { + if (errno == EAGAIN || errno == EINTR) + return 0; + + log_ipv4acd_errno(acd, errno, "Failed to read ARP packet: %m"); + goto fail; + } + if ((size_t) n != sizeof(struct ether_arp)) { + log_ipv4acd(acd, "Ignoring too short ARP packet."); + return 0; + } + + switch (acd->state) { - switch (ll->state) { case IPV4ACD_STATE_ANNOUNCING: case IPV4ACD_STATE_RUNNING: - if (ipv4acd_arp_conflict(ll, &packet)) { + + if (ipv4acd_arp_conflict(acd, &packet)) { usec_t ts; - assert_se(sd_event_now(ll->event, clock_boottime_or_monotonic(), &ts) >= 0); + assert_se(sd_event_now(acd->event, clock_boottime_or_monotonic(), &ts) >= 0); /* Defend address */ - if (ts > ll->defend_window) { - ll->defend_window = ts + DEFEND_INTERVAL * USEC_PER_SEC; - r = arp_send_announcement(ll->fd, ll->index, ll->address, &ll->mac_addr); + if (ts > acd->defend_window) { + acd->defend_window = ts + DEFEND_INTERVAL_USEC; + r = arp_send_announcement(acd->fd, acd->ifindex, acd->address, &acd->mac_addr); if (r < 0) { - log_ipv4acd_error_errno(ll, r, "Failed to send ARP announcement: %m"); - goto out; + log_ipv4acd_errno(acd, r, "Failed to send ARP announcement: %m"); + goto fail; } else - log_ipv4acd_debug(ll, "DEFEND"); + log_ipv4acd(acd, "DEFEND"); } else - ipv4acd_on_conflict(ll); + ipv4acd_on_conflict(acd); } - break; + case IPV4ACD_STATE_WAITING_PROBE: case IPV4ACD_STATE_PROBING: case IPV4ACD_STATE_WAITING_ANNOUNCE: /* BPF ensures this packet indicates a conflict */ - ipv4acd_on_conflict(ll); - + ipv4acd_on_conflict(acd); break; + default: assert_not_reached("Invalid state."); } -out: - if (r < 0) - sd_ipv4acd_stop(ll); + return 0; - return 1; +fail: + sd_ipv4acd_stop(acd); + return 0; } -int sd_ipv4acd_set_index(sd_ipv4acd *ll, int interface_index) { - assert_return(ll, -EINVAL); - assert_return(interface_index > 0, -EINVAL); - assert_return(ll->state == IPV4ACD_STATE_INIT, -EBUSY); +int sd_ipv4acd_set_ifindex(sd_ipv4acd *acd, int ifindex) { + assert_return(acd, -EINVAL); + assert_return(ifindex > 0, -EINVAL); + assert_return(acd->state == IPV4ACD_STATE_INIT, -EBUSY); - ll->index = interface_index; + acd->ifindex = ifindex; return 0; } -int sd_ipv4acd_set_mac(sd_ipv4acd *ll, const struct ether_addr *addr) { - assert_return(ll, -EINVAL); +int sd_ipv4acd_set_mac(sd_ipv4acd *acd, const struct ether_addr *addr) { + assert_return(acd, -EINVAL); assert_return(addr, -EINVAL); - assert_return(ll->state == IPV4ACD_STATE_INIT, -EBUSY); + assert_return(acd->state == IPV4ACD_STATE_INIT, -EBUSY); - memcpy(&ll->mac_addr, addr, ETH_ALEN); + acd->mac_addr = *addr; return 0; } -int sd_ipv4acd_detach_event(sd_ipv4acd *ll) { - assert_return(ll, -EINVAL); +int sd_ipv4acd_detach_event(sd_ipv4acd *acd) { + assert_return(acd, -EINVAL); - ll->event = sd_event_unref(ll->event); + acd->event = sd_event_unref(acd->event); return 0; } -int sd_ipv4acd_attach_event(sd_ipv4acd *ll, sd_event *event, int64_t priority) { +int sd_ipv4acd_attach_event(sd_ipv4acd *acd, sd_event *event, int64_t priority) { int r; - assert_return(ll, -EINVAL); - assert_return(!ll->event, -EBUSY); + assert_return(acd, -EINVAL); + assert_return(!acd->event, -EBUSY); if (event) - ll->event = sd_event_ref(event); + acd->event = sd_event_ref(event); else { - r = sd_event_default(&ll->event); + r = sd_event_default(&acd->event); if (r < 0) return r; } - ll->event_priority = priority; + acd->event_priority = priority; return 0; } -int sd_ipv4acd_set_callback(sd_ipv4acd *ll, sd_ipv4acd_callback_t cb, void *userdata) { - assert_return(ll, -EINVAL); +int sd_ipv4acd_set_callback(sd_ipv4acd *acd, sd_ipv4acd_callback_t cb, void *userdata) { + assert_return(acd, -EINVAL); - ll->cb = cb; - ll->userdata = userdata; + acd->callback = cb; + acd->userdata = userdata; return 0; } -int sd_ipv4acd_set_address(sd_ipv4acd *ll, const struct in_addr *address) { - assert_return(ll, -EINVAL); +int sd_ipv4acd_set_address(sd_ipv4acd *acd, const struct in_addr *address) { + assert_return(acd, -EINVAL); assert_return(address, -EINVAL); - assert_return(ll->state == IPV4ACD_STATE_INIT, -EBUSY); + assert_return(acd->state == IPV4ACD_STATE_INIT, -EBUSY); - ll->address = address->s_addr; + acd->address = address->s_addr; return 0; } -int sd_ipv4acd_is_running(sd_ipv4acd *ll) { - assert_return(ll, false); +int sd_ipv4acd_is_running(sd_ipv4acd *acd) { + assert_return(acd, false); - return ll->state != IPV4ACD_STATE_INIT; + return acd->state != IPV4ACD_STATE_INIT; } -static bool ether_addr_is_nul(const struct ether_addr *addr) { - const struct ether_addr nul_addr = {}; - - assert(addr); - - return memcmp(addr, &nul_addr, sizeof(struct ether_addr)) == 0; -} - -#define HASH_KEY SD_ID128_MAKE(df,04,22,98,3f,ad,14,52,f9,87,2e,d1,9c,70,e2,f2) - -int sd_ipv4acd_start(sd_ipv4acd *ll) { +int sd_ipv4acd_start(sd_ipv4acd *acd) { int r; - assert_return(ll, -EINVAL); - assert_return(ll->event, -EINVAL); - assert_return(ll->index > 0, -EINVAL); - assert_return(ll->address != 0, -EINVAL); - assert_return(!ether_addr_is_nul(&ll->mac_addr), -EINVAL); - assert_return(ll->state == IPV4ACD_STATE_INIT, -EBUSY); + assert_return(acd, -EINVAL); + assert_return(acd->event, -EINVAL); + assert_return(acd->ifindex > 0, -EINVAL); + assert_return(acd->address != 0, -EINVAL); + assert_return(!ether_addr_is_null(&acd->mac_addr), -EINVAL); + assert_return(acd->state == IPV4ACD_STATE_INIT, -EBUSY); - ll->defend_window = 0; - - r = arp_network_bind_raw_socket(ll->index, ll->address, &ll->mac_addr); + r = arp_network_bind_raw_socket(acd->ifindex, acd->address, &acd->mac_addr); if (r < 0) - goto out; + return r; - ll->fd = safe_close(ll->fd); - ll->fd = r; + safe_close(acd->fd); + acd->fd = r; + acd->defend_window = 0; + acd->n_conflict = 0; - r = sd_event_add_io(ll->event, &ll->receive_message, ll->fd, - EPOLLIN, ipv4acd_on_packet, ll); + r = sd_event_add_io(acd->event, &acd->receive_message_event_source, acd->fd, EPOLLIN, ipv4acd_on_packet, acd); if (r < 0) - goto out; + goto fail; - r = sd_event_source_set_priority(ll->receive_message, ll->event_priority); + r = sd_event_source_set_priority(acd->receive_message_event_source, acd->event_priority); if (r < 0) - goto out; + goto fail; - r = sd_event_source_set_description(ll->receive_message, "ipv4acd-receive-message"); - if (r < 0) - goto out; + (void) sd_event_source_set_description(acd->receive_message_event_source, "ipv4acd-receive-message"); - r = ipv4acd_set_next_wakeup(ll, 0, 0); + r = ipv4acd_set_next_wakeup(acd, 0, 0); if (r < 0) - goto out; -out: - if (r < 0) { - ipv4acd_stop(ll); - return r; - } + goto fail; + ipv4acd_set_state(acd, IPV4ACD_STATE_STARTED, true); return 0; + +fail: + ipv4acd_reset(acd); + return r; } |