-/* $OpenBSD: frontend.c,v 1.46 2024/05/17 06:50:14 florian Exp $ */
+/* $OpenBSD: frontend.c,v 1.47 2024/05/31 16:10:02 florian Exp $ */
/*
* Copyright (c) 2018 Florian Obser <florian@openbsd.org>
TAILQ_ENTRY(ra_iface) entry;
struct icmp6_ev *icmp6ev;
struct ra_prefix_conf_head prefixes;
+ struct ether_addr hw_addr;
char name[IF_NAMESIZE];
char conf_name[IF_NAMESIZE];
uint32_t if_index;
void icmp6_receive(int, short, void *);
void join_all_routers_mcast_group(struct ra_iface *);
void leave_all_routers_mcast_group(struct ra_iface *);
-int get_link_state(char *);
int get_ifrdomain(char *);
-void merge_ra_interface(char *, char *);
+void merge_ra_interface(char *, char *, struct ifaddrs *);
void merge_ra_interfaces(void);
struct ra_iface *find_ra_iface_by_id(uint32_t);
struct ra_iface *find_ra_iface_by_name(char *);
void free_ra_iface(struct ra_iface *);
int in6_mask2prefixlen(struct in6_addr *);
void get_interface_prefixes(struct ra_iface *,
- struct ra_prefix_conf *);
-int interface_has_linklocal_address(char *);
+ struct ra_prefix_conf *, struct ifaddrs *);
void build_packet(struct ra_iface *);
void build_leaving_packet(struct ra_iface *);
void ra_output(struct ra_iface *, struct sockaddr_in6 *);
return (NULL);
}
-int
-get_link_state(char *if_name)
-{
- struct ifaddrs *ifap, *ifa;
- int ls = LINK_STATE_UNKNOWN;
-
- if (getifaddrs(&ifap) != 0) {
- log_warn("getifaddrs");
- return LINK_STATE_UNKNOWN;
- }
- for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
- if (ifa->ifa_addr == NULL ||
- ifa->ifa_addr->sa_family != AF_LINK)
- continue;
- if (strcmp(if_name, ifa->ifa_name) != 0)
- continue;
-
- ls = ((struct if_data*)ifa->ifa_data)->ifi_link_state;
- break;
- }
- freeifaddrs(ifap);
- return ls;
-}
-
int
get_ifrdomain(char *if_name)
{
}
void
-merge_ra_interface(char *name, char *conf_name)
+merge_ra_interface(char *if_name, char *conf_name, struct ifaddrs *ifap)
{
struct ra_iface *ra_iface;
+ struct ifaddrs *ifa;
+ struct sockaddr_in6 *sin6;
+ struct in6_ifreq ifr6;
+ struct sockaddr_dl *sdl;
+ struct ether_addr hw_addr;
uint32_t if_index;
- int link_state, has_linklocal, ifrdomain;
+ int link_state = LINK_STATE_UNKNOWN;
+ int has_linklocal = 0, ifrdomain;
+ int has_hw_addr = 0;
+
+ for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
+ if (ifa->ifa_addr == NULL)
+ continue;
+ if (ifa->ifa_addr->sa_family != AF_LINK &&
+ ifa->ifa_addr->sa_family != AF_INET6)
+ continue;
+ if (strcmp(if_name, ifa->ifa_name) != 0)
+ continue;
+
+ if (ifa->ifa_addr->sa_family == AF_LINK) {
+ link_state =
+ ((struct if_data*)ifa->ifa_data)->ifi_link_state;
+ sdl = (struct sockaddr_dl *)ifa->ifa_addr;
+ if (sdl->sdl_type == IFT_ETHER &&
+ sdl->sdl_alen == ETHER_ADDR_LEN) {
+ has_hw_addr = 1;
+ memcpy(&hw_addr, LLADDR(sdl), ETHER_ADDR_LEN);
+ }
+ } else if (ifa->ifa_addr->sa_family == AF_INET6) {
+ sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
- link_state = get_link_state(name);
- has_linklocal = interface_has_linklocal_address(name);
- ifrdomain = get_ifrdomain(name);
+ if (!IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))
+ continue;
+
+ memset(&ifr6, 0, sizeof(ifr6));
+ strlcpy(ifr6.ifr_name, if_name, sizeof(ifr6.ifr_name));
+ memcpy(&ifr6.ifr_addr, sin6, sizeof(ifr6.ifr_addr));
+ if (ioctl(ioctlsock, SIOCGIFAFLAG_IN6,
+ (caddr_t)&ifr6) == -1) {
+ log_warn("SIOCGIFAFLAG_IN6");
+ continue;
+ }
- if ((ra_iface = find_ra_iface_by_name(name)) != NULL) {
+ if (ifr6.ifr_ifru.ifru_flags6 & (IN6_IFF_TENTATIVE |
+ IN6_IFF_DUPLICATED))
+ continue;
+ has_linklocal = 1;
+ }
+ }
+
+ ifrdomain = get_ifrdomain(if_name);
+
+ if ((ra_iface = find_ra_iface_by_name(if_name)) != NULL) {
ra_iface->link_state = link_state;
if (!LINK_STATE_IS_UP(link_state)) {
- log_debug("%s down, removing", name);
+ log_debug("%s down, removing", if_name);
ra_iface->removed = 1;
} else if (!has_linklocal) {
log_debug("%s has no IPv6 link-local address, "
- "removing", name);
+ "removing", if_name);
ra_iface->removed = 1;
} else if (ifrdomain == -1) {
- log_debug("can't get rdomain for %s, removing", name);
+ log_debug("can't get rdomain for %s, removing", if_name);
+ ra_iface->removed = 1;
+ } else if (!has_hw_addr) {
+ log_debug("%s has no mac address, removing", if_name);
ra_iface->removed = 1;
} else if (ra_iface->rdomain != ifrdomain) {
leave_all_routers_mcast_group(ra_iface);
join_all_routers_mcast_group(ra_iface);
ra_iface->removed = 0;
} else {
- log_debug("keeping interface %s", name);
+ log_debug("keeping interface %s", if_name);
ra_iface->removed = 0;
}
+ memcpy(&ra_iface->hw_addr, &hw_addr, sizeof(hw_addr));
return;
}
if (!LINK_STATE_IS_UP(link_state)) {
- log_debug("%s down, ignoring", name);
+ log_debug("%s down, ignoring", if_name);
return;
}
if (!has_linklocal) {
- log_debug("%s has no IPv6 link-local address, ignoring", name);
+ log_debug("%s has no IPv6 link-local address, ignoring",
+ if_name);
return;
}
- log_debug("new interface %s", name);
- if ((if_index = if_nametoindex(name)) == 0)
+ if (ifrdomain == -1) {
+ log_debug("can't get rdomain for %s, ignoring", if_name);
return;
+ }
- log_debug("adding interface %s", name);
+ if (!has_hw_addr) {
+ log_debug("%s has no mac address, ignoring", if_name);
+ return;
+ }
+
+ log_debug("new interface %s", if_name);
+ if ((if_index = if_nametoindex(if_name)) == 0)
+ return;
+
+ log_debug("adding interface %s", if_name);
if ((ra_iface = calloc(1, sizeof(*ra_iface))) == NULL)
fatal("%s", __func__);
- strlcpy(ra_iface->name, name, sizeof(ra_iface->name));
+ strlcpy(ra_iface->name, if_name, sizeof(ra_iface->name));
strlcpy(ra_iface->conf_name, conf_name,
sizeof(ra_iface->conf_name));
ra_iface->if_index = if_index;
ra_iface->rdomain = ifrdomain;
-
+ memcpy(&ra_iface->hw_addr, &hw_addr, sizeof(hw_addr));
SIMPLEQ_INIT(&ra_iface->prefixes);
ra_iface->icmp6ev = get_icmp6ev_by_rdomain(ifrdomain);
struct ra_iface *ra_iface;
struct ifgroupreq ifgr;
struct ifg_req *ifg;
+ struct ifaddrs *ifap;
char *conf_name;
unsigned int len;
+ if (getifaddrs(&ifap) != 0) {
+ log_warn("getifaddrs");
+ return;
+ }
+
TAILQ_FOREACH(ra_iface, &ra_interfaces, entry)
ra_iface->removed = 1;
/* check if network interface or group */
if (isdigit((unsigned char)conf_name[strlen(conf_name) - 1])) {
- merge_ra_interface(conf_name, conf_name);
+ merge_ra_interface(conf_name, conf_name, ifap);
} else {
log_debug("interface group %s", conf_name);
ifg++) {
len -= sizeof(struct ifg_req);
merge_ra_interface(ifg->ifgrq_member,
- conf_name);
+ conf_name, ifap);
}
free(ifgr.ifgr_groups);
}
if (ra_iface_conf->autoprefix)
get_interface_prefixes(ra_iface,
- ra_iface_conf->autoprefix);
+ ra_iface_conf->autoprefix, ifap);
build_packet(ra_iface);
}
+ freeifaddrs(ifap);
}
void
return (plen);
}
-int
-interface_has_linklocal_address(char *name)
-{
- struct ifaddrs *ifap, *ifa;
- struct sockaddr_in6 *sin6;
- struct in6_ifreq ifr6;
- int ret = 0;
-
- if (getifaddrs(&ifap) != 0)
- fatal("getifaddrs");
-
- for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) {
- if (strcmp(name, ifa->ifa_name) != 0)
- continue;
- if (ifa->ifa_addr == NULL ||
- ifa->ifa_addr->sa_family != AF_INET6)
- continue;
-
- sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
-
- if (!IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))
- continue;
-
- memset(&ifr6, 0, sizeof(ifr6));
- strlcpy(ifr6.ifr_name, name, sizeof(ifr6.ifr_name));
- memcpy(&ifr6.ifr_addr, sin6, sizeof(ifr6.ifr_addr));
- if (ioctl(ioctlsock, SIOCGIFAFLAG_IN6, (caddr_t)&ifr6) == -1) {
- log_warn("SIOCGIFAFLAG_IN6");
- continue;
- }
-
- if (ifr6.ifr_ifru.ifru_flags6 & (IN6_IFF_TENTATIVE |
- IN6_IFF_DUPLICATED))
- continue;
-
- ret = 1;
- break;
- }
- freeifaddrs(ifap);
- return (ret);
-}
-
void
get_interface_prefixes(struct ra_iface *ra_iface, struct ra_prefix_conf
- *autoprefix)
+ *autoprefix, struct ifaddrs *ifap)
{
struct in6_ifreq ifr6;
- struct ifaddrs *ifap, *ifa;
+ struct ifaddrs *ifa;
struct sockaddr_in6 *sin6;
int prefixlen;
- log_debug("%s: %s", __func__, ra_iface->name);
-
- if (getifaddrs(&ifap) != 0)
- fatal("getifaddrs");
-
for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) {
if (strcmp(ra_iface->name, ifa->ifa_name) != 0)
continue;
add_new_prefix_to_ra_iface(ra_iface, &sin6->sin6_addr,
prefixlen, autoprefix);
}
- freeifaddrs(ifap);
}
struct ra_prefix_conf*
struct ra_rdnss_conf *ra_rdnss;
struct ra_dnssl_conf *ra_dnssl;
struct ra_pref64_conf *pref64;
- struct ifaddrs *ifap, *ifa;
- struct sockaddr_dl *sdl;
size_t len, label_len;
uint8_t *p, buf[RA_MAX_SIZE];
char *label_start, *label_end;
ndopt_source_link_addr->nd_opt_source_link_addr_type =
ND_OPT_SOURCE_LINKADDR;
ndopt_source_link_addr->nd_opt_source_link_addr_len = 1;
- if (getifaddrs(&ifap) != 0) {
- ifap = NULL;
- log_warn("getifaddrs");
- }
- for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
- if (ifa->ifa_addr == NULL ||
- ifa->ifa_addr->sa_family != AF_LINK)
- continue;
- if (strcmp(ra_iface->name, ifa->ifa_name) != 0)
- continue;
- sdl = (struct sockaddr_dl *)ifa->ifa_addr;
- if (sdl->sdl_type != IFT_ETHER ||
- sdl->sdl_alen != ETHER_ADDR_LEN)
- continue;
- memcpy(&ndopt_source_link_addr->
- nd_opt_source_link_addr_hw_addr,
- LLADDR(sdl), ETHER_ADDR_LEN);
- break;
- }
- if (ifap != NULL) {
- freeifaddrs(ifap);
- p += sizeof(*ndopt_source_link_addr);
- } else
- len -= sizeof(*ndopt_source_link_addr);
+ memcpy(&ndopt_source_link_addr->nd_opt_source_link_addr_hw_addr,
+ &ra_iface->hw_addr, ETHER_ADDR_LEN);
+ p += sizeof(*ndopt_source_link_addr);
}
if (ra_options_conf->mtu > 0) {
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