X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=src%2Fvip6-autod.c;h=0c0ee1a85f44f2fc9330615dc9a8035c6470b8bd;hb=dccdfa00e111d23069dbd94182e75ec1bd47d4fa;hp=f45dce5f80b77e7eaf000372154cc6cdc8e376e4;hpb=67fe4e14443e2735adbacc6878053348ab5e40a4;p=util-vserver.git diff --git a/src/vip6-autod.c b/src/vip6-autod.c index f45dce5..0c0ee1a 100644 --- a/src/vip6-autod.c +++ b/src/vip6-autod.c @@ -1,3 +1,16 @@ +/* + * $Id$ + * Copyright (c) 2007 The Trustees of Princeton University + * Author: Daniel Hokka Zakrisson + * + * Licensed under the terms of the GNU General Public License + * version 2 or later. + */ + +#ifdef HAVE_CONFIG_H +# include +#endif + #include #include #include @@ -11,26 +24,24 @@ #include #include #include +#include +#include #include -#include -#include -/*XXX #include */ -struct in6_ifreq { - struct in6_addr ifr6_addr; - __u32 ifr6_prefixlen; - int ifr6_ifindex; -}; +#include +#include -typedef unsigned int nid_t; -typedef unsigned int xid_t; #include +#include "pathconfig.h" #define HAS_ADDRESS 0x01 #define HAS_PREFIX 0x02 -struct prefix_list { - struct prefix_list *prev; - struct prefix_list *next; + +struct nid_list { + nid_t nid; + struct nid_list *next; +}; +struct prefix { uint32_t mask; int ifindex; struct { @@ -44,6 +55,20 @@ struct prefix_list { time_t valid_until; } address; }; +struct nid_prefix_map { + struct { + struct nid_prefix_map *prev; + struct nid_prefix_map *next; + } n; + struct { + struct nid_prefix_map *prev; + struct nid_prefix_map *next; + } p; + struct prefix *prefix; + nid_t nid; +}; + +struct nl_handle *handle; /* from linux/include/net/ipv6.h */ static inline int ipv6_prefix_equal(struct in6_addr *prefix, @@ -65,233 +90,536 @@ static inline int ipv6_prefix_equal(struct in6_addr *prefix, return 1; } -static int add_address_to_interface(int ifindex, struct in6_addr *address, int prefix) +static int add_address_to_interface(int ifindex, struct in6_addr *address, + int prefix) { - struct in6_ifreq ireq; - int sock; + int err = -1; + struct rtnl_addr *rta; + struct nl_addr *nl; + + nl = nl_addr_build(AF_INET6, address, sizeof(struct in6_addr)); + rta = rtnl_addr_alloc(); + + rtnl_addr_set_family(rta, AF_INET6); + rtnl_addr_set_ifindex(rta, ifindex); + rtnl_addr_set_local(rta, nl); + rtnl_addr_set_prefixlen(rta, prefix); - ireq.ifr6_ifindex = ifindex; - ireq.ifr6_prefixlen = prefix; - memcpy(&ireq.ifr6_addr, address, sizeof(*address)); + if (rtnl_addr_add(handle, rta, NLM_F_REPLACE) != -1 || errno == EEXIST) + err = 0; + + rtnl_addr_free(rta); + nl_addr_destroy(nl); + return err; +} - /* XXX should use netlink */ - sock = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP); - if (sock == -1) +static inline int remove_address_from_interface(struct nid_prefix_map *entry) +{ + struct rtnl_addr *rta; + struct nl_addr *nl; + struct in6_addr a; + int ret; + + memcpy(&a, &entry->prefix->address.addr, sizeof(a)); + if (entry->nid != 0) { + a.s6_addr[11] = (entry->nid & 0x7f80) >> 7; + a.s6_addr[12] = (entry->nid & 0x7f) << 1; + } + + nl = nl_addr_build(AF_INET6, &a, sizeof(a)); + if (!nl) + return -1; + rta = rtnl_addr_alloc(); + if (!rta) return -1; - if (ioctl(sock, SIOCSIFADDR, &ireq) == -1 && errno != EEXIST) { - close(sock); + rtnl_addr_set_family(rta, AF_INET6); + rtnl_addr_set_ifindex(rta, entry->prefix->ifindex); + rtnl_addr_set_local(rta, nl); + rtnl_addr_set_prefixlen(rta, entry->prefix->address.prefix_len); + + ret = rtnl_addr_delete(handle, rta, 0); + + rtnl_addr_free(rta); + nl_addr_destroy(nl); + + return ret; +} + +static int add_to_map(struct nid_prefix_map *map, struct nid_prefix_map *new) +{ + struct nid_prefix_map *i; +#define PUT_IT_IN_PLACE(node, member, om) \ + /* find the correct location in the list */ \ + for (i = map->node.next; i->node.next && i->member < \ + new->member; i = i->node.next) \ + ; \ + if (i && i->member == new->member && i->om == new->om) \ + return 0; \ + /* first in the list */ \ + if (!i || !i->node.prev) { \ + new->node.prev = NULL; \ + new->node.next = i; \ + map->node.next = new; \ + if (i) \ + i->node.prev = new; \ + } \ + /* last in the list */ \ + else if (i->node.next == NULL) { \ + new->node.prev = i; \ + new->node.next = NULL; \ + i->node.next = new; \ + } \ + /* somewhere in the middle */ \ + else { \ + new->node.prev = i->node.prev; \ + new->node.next = i; \ + i->node.prev->node.next = new; \ + i->node.prev = new; \ + } + PUT_IT_IN_PLACE(p, prefix, nid) + PUT_IT_IN_PLACE(n, nid, prefix) + return 1; +} + +static inline void remove_from_map(struct nid_prefix_map *map, + struct nid_prefix_map *entry) +{ + if (map->n.next == entry) + map->n.next = entry->n.next; + if (map->n.prev == entry) + map->n.prev = entry->n.prev; + if (map->p.next == entry) + map->p.next = entry->p.next; + if (map->p.prev == entry) + map->p.prev = entry->p.prev; +} + +static inline void remove_from_map_and_free(struct nid_prefix_map *map, + struct nid_prefix_map *entry) +{ + remove_from_map(map, entry); + free(entry); +} + +static int add_nid_to_map(struct nid_prefix_map *map, struct prefix *prefix, + nid_t nid) +{ + struct nid_prefix_map *new = calloc(1, sizeof(struct nid_prefix_map)); + int ret; + + if (!new) return -1; + + new->prefix = prefix; + new->nid = nid; + ret = add_to_map(map, new); + + if (ret == 0) + free(new); + + return ret; +} + +static int add_prefix_to_map(struct nid_prefix_map *map, struct prefix *prefix) +{ + return add_nid_to_map(map, prefix, 0); +} + +static void cleanup_prefix(struct nid_prefix_map *map, + struct nid_prefix_map *first) +{ + struct nid_prefix_map *i, *p = NULL; + + for (i = first; i && first->prefix == i->prefix; i = i->p.next) { + if (p) + remove_from_map_and_free(map, p); + + /* ignore errors */ + remove_address_from_interface(i); + + p = i; } + if (p) + remove_from_map_and_free(map, p); +} - close(sock); - return 0; +static inline int add_nid_to_list(struct nid_list **head, nid_t nid) +{ + struct nid_list *i, *new; + + for (i = *head; i && i->next && i->next->nid < nid; i = i->next) + ; + /* check if this nid is first in the list */ + if (i && i->nid == nid) + return 0; + /* check if it's already in the list */ + if (i && i->next && i->next->nid == nid) + return 0; + + /* add it */ + new = calloc(1, sizeof(struct nid_list)); + if (!new) + return -1; + new->nid = nid; + + /* this is the lowest nid in the list */ + if (i == *head) { + *head = new; + new->next = i; + } + /* in the middle/at the end */ + else if (i) { + new->next = i->next; + i->next = new; + } + /* there was no list */ + else + *head = new; + + return 1; } -static void do_slices_autoconf(struct prefix_list *head) +static inline void free_nid_list(struct nid_list *head) +{ + struct nid_list *p; + for (p = NULL; head; head = head->next) { + if (p) + free(p); + p = head; + } + if (p) + free(p); +} + +static inline void cleanup_nid(struct nid_prefix_map *map, + nid_t nid) +{ + struct nid_prefix_map *i, *p = NULL; + for (i = map->n.next; i->nid < nid; i = i->n.next) + ; + /* this nid doesn't have any entries in the map */ + if (i->nid != nid) + return; + for (; i->nid == nid; i = i->n.next) { + if (p) + remove_from_map_and_free(map, p); + remove_address_from_interface(i); + p = i; + } + if (p) + remove_from_map_and_free(map, p); +} + +static inline void cleanup_nids(struct nid_prefix_map *map, + struct nid_list *previous, + struct nid_list *current) +{ + struct nid_list *p, *pprev = NULL, *c; + for (p = previous, c = current; p; pprev = p, p = p->next) { + if (pprev) + free(pprev); + while (c->nid < p->nid) + c = c->next; + if (c->nid == p->nid) + continue; + /* this context has disappeared */ + cleanup_nid(map, p->nid); + } + if (pprev) + free(pprev); +} + +static void do_slices_autoconf(struct nid_prefix_map *map) { DIR *dp; struct dirent *de; - nid_t nid; - struct vc_net_nx addr; - struct prefix_list *i, *expired = NULL; + struct vc_net_addr addr; + struct nid_prefix_map *i; + struct nid_list *current = NULL, *n; + static struct nid_list *previous = NULL; if ((dp = opendir("/proc/virtnet")) == NULL) return; while ((de = readdir(dp)) != NULL) { + nid_t nid; + if (!isdigit(de->d_name[0])) continue; nid = strtoul(de->d_name, NULL, 10); - addr.type = vcNET_IPV6; - addr.count = -1; - if (vc_net_remove(nid, &addr) == -1) + addr.vna_type = VC_NXA_TYPE_IPV6 | VC_NXA_TYPE_ANY; + if (vc_net_remove(nid, &addr) == -1) { + syslog(LOG_ERR, "vc_net_remove(%u): %s", nid, strerror(errno)); continue; + } + + add_nid_to_list(¤t, nid); + } + closedir(dp); - for (i = head->next; i;) { + for (n = current; n; n = n->next) { + for (i = map->p.next; i && i->nid == 0;) { /* expired */ - if (i->mask & HAS_PREFIX && i->prefix.valid_until < time(NULL)) { - struct prefix_list *tmp; - if (i->next) - i->next->prev = i->prev; - if (i->prev) - i->prev->next = i->next; - - tmp = i->next; - free(i); + if (i->prefix->mask & HAS_PREFIX && i->prefix->prefix.valid_until < time(NULL)) { + struct nid_prefix_map *tmp; + char buf[64]; + + inet_ntop(AF_INET6, &i->prefix->address.addr, buf, sizeof(buf)); + syslog(LOG_NOTICE, "Address %s timed out", buf); + + tmp = i->p.next; + + cleanup_prefix(map, i); + i = tmp; continue; } - if (i->mask != (HAS_ADDRESS|HAS_PREFIX)) + if (i->prefix->mask != (HAS_ADDRESS|HAS_PREFIX)) goto next; - addr.count = 1; - addr.mask[0] = i->prefix.prefix_len; - memcpy(addr.ip, &i->address.addr, sizeof(struct in6_addr)); - addr.ip[2] = htonl((ntohl(addr.ip[2]) & 0xffffff00) | ((nid & 0x7f00) >> 7)); - addr.ip[3] = htonl((ntohl(addr.ip[3]) & 0x00ffffff) | ((nid & 0xff) << 25)); - if (vc_net_add(nid, &addr) == -1) { - perror("vc_net_add"); - exit(1); + addr.vna_type = VC_NXA_TYPE_IPV6 | VC_NXA_TYPE_ADDR; + memcpy(&addr.vna_v6_ip, &i->prefix->address.addr, sizeof(struct in6_addr)); + addr.vna_prefix = i->prefix->prefix.prefix_len; + if (addr.vna_prefix == 64) { + addr.vna_v6_mask.s6_addr32[0] = addr.vna_v6_mask.s6_addr32[1] = 0xffffffff; + addr.vna_v6_mask.s6_addr32[2] = addr.vna_v6_mask.s6_addr32[3] = 0; } - if (add_address_to_interface(i->ifindex, (struct in6_addr *) addr.ip, i->prefix.prefix_len) == -1) { - perror("add_address_to_interface"); - exit(1); + addr.vna_v6_ip.s6_addr[11] = (n->nid & 0x7f80) >> 7; + addr.vna_v6_ip.s6_addr[12] = (n->nid & 0x007f) << 1; + if (vc_net_add(n->nid, &addr) == -1) { + syslog(LOG_ERR, "vc_net_add(%u): %s", n->nid, strerror(errno)); + goto next; + } + if (add_address_to_interface(i->prefix->ifindex, &addr.vna_v6_ip, addr.vna_prefix) == -1) { + syslog(LOG_ERR, "add_address_to_interface: %s", strerror(errno)); + goto next; + } + if (add_nid_to_map(map, i->prefix, n->nid) == -1) { + syslog(LOG_ERR, "add_nid_to_map: %s", strerror(errno)); + goto next; } next: - i = i->next; + i = i->p.next; } } - closedir(dp); + + cleanup_nids(map, previous, current); + previous = current; } -static int add_prefix(struct prefix_list *head, struct prefixmsg *msg, +/* XXX These two functions are very similar */ +static int add_prefix(struct nid_prefix_map *map, struct prefixmsg *msg, struct in6_addr *prefix, struct prefix_cacheinfo *cache) { - struct prefix_list *i = head; + struct nid_prefix_map *i = map; + struct prefix *new; + if (!msg || !prefix || !cache) return -1; + /* XXX IF_PREFIX_AUTOCONF == 0x02 */ + if (!(msg->prefix_flags & 0x02)) + return -1; do { - if (i->next != NULL) - i = i->next; - if (ipv6_prefix_equal(prefix, &i->prefix.addr, msg->prefix_len) || - ipv6_prefix_equal(prefix, &i->address.addr, msg->prefix_len)) { - i->mask |= HAS_PREFIX; - i->ifindex = msg->prefix_ifindex; - memcpy(&i->prefix.addr, prefix, sizeof(*prefix)); - i->prefix.prefix_len = msg->prefix_len; - i->prefix.valid_until = time(NULL) + cache->preferred_time; + if (i->p.next != NULL) + i = i->p.next; + if (ipv6_prefix_equal(prefix, &i->prefix->prefix.addr, msg->prefix_len) || + ipv6_prefix_equal(prefix, &i->prefix->address.addr, msg->prefix_len)) { + i->prefix->mask |= HAS_PREFIX; + i->prefix->ifindex = msg->prefix_ifindex; + memcpy(&i->prefix->prefix.addr, prefix, sizeof(*prefix)); + i->prefix->prefix.prefix_len = msg->prefix_len; + i->prefix->prefix.valid_until = time(NULL) + cache->preferred_time; return 0; } - } while (i->next); + } while (i->p.next && i->nid == 0); - i->next = calloc(1, sizeof(*i)); - if (!i->next) + /* not yet in the map */ + new = calloc(1, sizeof(*new)); + if (!new) + return -1; + new->mask = HAS_PREFIX; + memcpy(&new->prefix.addr, prefix, sizeof(*prefix)); + new->prefix.prefix_len = msg->prefix_len; + new->prefix.valid_until = time(NULL) + cache->preferred_time; + if (add_prefix_to_map(map, new) == -1) return -1; - i->next->prev = i; - i = i->next; - i->mask = HAS_PREFIX; - memcpy(&i->prefix.addr, prefix, sizeof(*prefix)); - i->prefix.prefix_len = msg->prefix_len; - i->prefix.valid_until = time(NULL) + cache->preferred_time; return 1; } -static inline int add_address(struct prefix_list *head, struct ifaddrmsg *msg, +static inline int add_address(struct nid_prefix_map *map, struct ifaddrmsg *msg, struct in6_addr *address, struct ifa_cacheinfo *cache) { - struct prefix_list *i = head; + struct nid_prefix_map *i = map; + struct prefix *new; + if (!msg || !address || !cache) return -1; if (address->s6_addr[11] != 0xFF || address->s6_addr[12] != 0xFE) - return 0; + return -1; do { - if (i->next != NULL) - i = i->next; - if (ipv6_prefix_equal(address, &i->prefix.addr, msg->ifa_prefixlen) || - ipv6_prefix_equal(address, &i->address.addr, msg->ifa_prefixlen)) { - i->mask |= HAS_ADDRESS; - memcpy(&i->address.addr, address, sizeof(*address)); - i->address.prefix_len = msg->ifa_prefixlen; - i->address.valid_until = time(NULL) + cache->ifa_prefered; + if (i->p.next != NULL) + i = i->p.next; + if (ipv6_prefix_equal(address, &i->prefix->prefix.addr, msg->ifa_prefixlen) || + ipv6_prefix_equal(address, &i->prefix->address.addr, 128)) { + i->prefix->mask |= HAS_ADDRESS; + memcpy(&i->prefix->address.addr, address, sizeof(*address)); + i->prefix->address.prefix_len = msg->ifa_prefixlen; + i->prefix->address.valid_until = time(NULL) + cache->ifa_prefered; return 0; } - } while (i->next); + } while (i->p.next && i->nid == 0); - i->next = calloc(1, sizeof(*i)); - if (!i->next) + new = calloc(1, sizeof(*new)); + if (!new) + return -1; + new->mask = HAS_ADDRESS; + memcpy(&new->address.addr, address, sizeof(*address)); + new->address.prefix_len = msg->ifa_prefixlen; + new->address.valid_until = time(NULL) + cache->ifa_prefered; + if (add_prefix_to_map(map, new) == -1) return -1; - i->next->prev = i; - i = i->next; - i->mask = HAS_ADDRESS; - memcpy(&i->address.addr, address, sizeof(*address)); - i->address.prefix_len = msg->ifa_prefixlen; - i->address.valid_until = time(NULL) + cache->ifa_prefered; return 1; } -int main(int argc, char *argv[]) +static struct nla_policy addr_policy[IFA_MAX+1] = { + [IFA_ADDRESS] = { .minlen = sizeof(struct in6_addr) }, + [IFA_LABEL] = { .type = NLA_STRING, + .maxlen = IFNAMSIZ }, + [IFA_CACHEINFO] = { .minlen = sizeof(struct ifa_cacheinfo) }, +}; +static struct nla_policy prefix_policy[PREFIX_MAX+1] = { + [PREFIX_ADDRESS] = { .minlen = sizeof(struct in6_addr) }, + [PREFIX_CACHEINFO] = { .minlen = sizeof(struct prefix_cacheinfo) }, +}; +int handle_valid_msg(struct nl_msg *msg, void *arg) { - int sock; - struct sockaddr_nl sa; - struct prefix_list head = { .prev = NULL, .next = NULL }; + struct nlmsghdr *nlh = nlmsg_hdr(msg); + int ret = -1; + char *payload; + struct sockaddr_nl *source = nlmsg_get_src(msg); + + payload = nlmsg_data(nlh); + if (source->nl_groups == RTMGRP_IPV6_PREFIX) { + struct prefixmsg *prefixmsg; + struct in6_addr *prefix = NULL; + struct prefix_cacheinfo *cacheinfo = NULL; + struct nlattr *tb[PREFIX_MAX+1]; + + if (nlmsg_parse(nlh, sizeof(struct prefixmsg), tb, PREFIX_MAX, prefix_policy) < 0) { + syslog(LOG_ERR, "Failed to parse prefixmsg"); + return -1; + } - sock = socket(PF_NETLINK, SOCK_DGRAM, NETLINK_ROUTE); - if (sock == -1) { - perror("socket()"); - exit(1); + prefixmsg = (struct prefixmsg *) payload; + if (tb[PREFIX_ADDRESS]) + prefix = nl_data_get(nla_get_data(tb[PREFIX_ADDRESS])); + if (tb[PREFIX_CACHEINFO]) + cacheinfo = nl_data_get(nla_get_data(tb[PREFIX_CACHEINFO])); + ret = add_prefix(arg, prefixmsg, prefix, cacheinfo); + } + else if (source->nl_groups == RTMGRP_IPV6_IFADDR) { + struct ifaddrmsg *ifaddrmsg; + struct in6_addr *address = NULL; + struct ifa_cacheinfo *cacheinfo = NULL; + struct nlattr *tb[IFA_MAX+1]; + + if (nlmsg_parse(nlh, sizeof(struct ifaddrmsg), tb, IFA_MAX, addr_policy) < 0) { + syslog(LOG_ERR, "Failed to parse ifaddrmsg"); + return -1; + } + + ifaddrmsg = (struct ifaddrmsg *) payload; + if (tb[IFA_ADDRESS]) + address = nl_data_get(nla_get_data(tb[IFA_ADDRESS])); + if (tb[IFA_CACHEINFO]) + cacheinfo = nl_data_get(nla_get_data(tb[IFA_CACHEINFO])); + ret = add_address(arg, ifaddrmsg, address, cacheinfo); } - sa.nl_family = AF_NETLINK; - sa.nl_groups = RTMGRP_IPV6_PREFIX|RTMGRP_IPV6_IFADDR; - if (bind(sock, (struct sockaddr *) &sa, sizeof(sa)) == -1) { - perror("bind()"); - exit(1); + if (ret >= 0) + do_slices_autoconf(arg); + + return 0; +} + +int handle_error_msg(struct sockaddr_nl *source, struct nlmsgerr *err, + void *arg) +{ + syslog(LOG_ERR, "%s", strerror(err->error)); + return 0; +} + +int handle_no_op(struct nl_msg *msg, void *arg) +{ + return 0; +} + +/* only for access in the signal handler */ +struct nid_prefix_map map = { + .n = { + .next = NULL, + .prev = NULL, + }, + .p = { + .next = NULL, + .prev = NULL, + }, +}; +void signal_handler(int signal) +{ + switch (signal) { + case SIGUSR1: + do_slices_autoconf(&map); + break; } +} - while (1) { - char buf[4000], *payload; - struct nlmsghdr *nlh; - ssize_t len, this_len; - socklen_t socklen = sizeof(sa); - - if ((len = recvfrom(sock, buf, sizeof(buf), 0, - (struct sockaddr *) &sa, &socklen)) <= 0) - break; - for (nlh = (struct nlmsghdr *) buf; NLMSG_OK(nlh, len); nlh = NLMSG_NEXT(nlh, len)) { - struct nlattr *nla; - - if (nlh->nlmsg_type == NLMSG_DONE) - break; - else if (nlh->nlmsg_type == NLMSG_ERROR) - break; - - this_len = NLMSG_ALIGN((nlh)->nlmsg_len) - NLMSG_LENGTH(0); - payload = NLMSG_DATA(nlh); - if (sa.nl_groups == RTMGRP_IPV6_PREFIX) { - struct prefixmsg *prefixmsg; - struct in6_addr *prefix; - struct prefix_cacheinfo *cacheinfo; - - prefixmsg = (struct prefixmsg *) payload; - prefix = NULL; - cacheinfo = NULL; - for (nla = (struct nlattr *)(payload + sizeof(*prefixmsg)); nla < payload + this_len; nla = (char *) nla + nla->nla_len) { - if (nla->nla_type == PREFIX_ADDRESS) - prefix = (struct in6_addr *)(((char *) nla) + sizeof(*nla)); - else if (nla->nla_type == PREFIX_CACHEINFO) - cacheinfo = (struct prefix_cacheinfo *)(((char *) nla) + sizeof(*nla)); - } - if (add_prefix(&head, prefixmsg, prefix, cacheinfo) == -1) { - printf("Adding prefix failed!\n"); - } - } - else if (sa.nl_groups == RTMGRP_IPV6_IFADDR) { - struct ifaddrmsg *ifaddrmsg; - struct in6_addr *address; - struct ifa_cacheinfo *cacheinfo; - - ifaddrmsg = (struct ifaddrmsg *) payload; - address = NULL; - cacheinfo = NULL; - for (nla = (struct nlattr *)(payload + sizeof(*ifaddrmsg)); nla < payload + this_len; nla = (char *) nla + nla->nla_len) { - if (nla->nla_type == IFA_ADDRESS) - address = (struct in6_addr *)(((char *) nla) + sizeof(*nla)); - else if (nla->nla_type == IFA_CACHEINFO) - cacheinfo = (struct ifa_cacheinfo *)(((char *) nla) + sizeof(*nla)); - } - if (add_address(&head, ifaddrmsg, address, cacheinfo) == -1) { - printf("Adding address failed!\n"); - } - } - } - do_slices_autoconf(&head); +static int write_pidfile(const char *filename) +{ + FILE *fp; + fp = fopen(filename, "w"); + if (!fp) + return -1; + fprintf(fp, "%d\n", getpid()); + fclose(fp); + return 0; +} + +int main(int argc, char *argv[]) +{ + struct nl_cb *cbs; + + openlog("vip6-autod", LOG_PERROR, LOG_DAEMON); + + handle = nl_handle_alloc_nondefault(NL_CB_VERBOSE); + cbs = nl_handle_get_cb(handle); + nl_cb_set(cbs, NL_CB_VALID, NL_CB_CUSTOM, handle_valid_msg, &map); + nl_cb_set(cbs, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, handle_no_op, NULL); + nl_cb_err(cbs, NL_CB_CUSTOM, handle_error_msg, &map); + nl_disable_sequence_check(handle); + + nl_join_groups(handle, RTMGRP_IPV6_PREFIX|RTMGRP_IPV6_IFADDR); + if (nl_connect(handle, NETLINK_ROUTE) == -1) { + syslog(LOG_CRIT, "nl_connect: %s", strerror(errno)); + exit(1); } - close(sock); + if (daemon(0, 0) == -1) + return -1; + + /* XXX .. here is a hack */ + write_pidfile(DEFAULT_PKGSTATEDIR "/../vip6-autod.pid"); + + signal(SIGUSR1, signal_handler); + + while (nl_recvmsgs(handle, cbs) > 0); + + nl_close(handle); + closelog(); return 0; }