X-Git-Url: http://git.meshlink.io/?a=blobdiff_plain;f=iface.c;fp=iface.c;h=0000000000000000000000000000000000000000;hb=f93eca3530bef2cc23ffe6c3a04493ad171c2aed;hp=519a65b4e0a3bd2ffea6874310beb32aa6bcc2b2;hpb=42c9b99f2bb21d0ff1f1918314f9d5dd82a62763;p=catta diff --git a/iface.c b/iface.c deleted file mode 100644 index 519a65b..0000000 --- a/iface.c +++ /dev/null @@ -1,562 +0,0 @@ -#include -#include -#include -#include -#include -#include -#include - -#include "iface.h" -#include "netlink.h" -#include "dns.h" -#include "socket.h" -#include "announce.h" - -static void update_address_rr(AvahiInterfaceMonitor *m, AvahiInterfaceAddress *a, int remove) { - g_assert(m); - g_assert(a); - - if (!avahi_interface_address_relevant(a) || remove) { - if (a->entry_group) { - avahi_entry_group_free(a->entry_group); - a->entry_group = NULL; - } - } else { - if (!a->entry_group) { - a->entry_group = avahi_entry_group_new(m->server, NULL, NULL); - avahi_server_add_address(m->server, a->entry_group, a->interface->hardware->index, AF_UNSPEC, 0, NULL, &a->address); - avahi_entry_group_commit(a->entry_group); - } - } -} - -static void update_interface_rr(AvahiInterfaceMonitor *m, AvahiInterface *i, int remove) { - AvahiInterfaceAddress *a; - g_assert(m); - g_assert(i); - - for (a = i->addresses; a; a = a->address_next) - update_address_rr(m, a, remove); -} - -static void update_hw_interface_rr(AvahiInterfaceMonitor *m, AvahiHwInterface *hw, int remove) { - AvahiInterface *i; - - g_assert(m); - g_assert(hw); - - for (i = hw->interfaces; i; i = i->by_hardware_next) - update_interface_rr(m, i, remove); -} - -static void free_address(AvahiInterfaceMonitor *m, AvahiInterfaceAddress *a) { - g_assert(m); - g_assert(a); - g_assert(a->interface); - - AVAHI_LLIST_REMOVE(AvahiInterfaceAddress, address, a->interface->addresses, a); - - if (a->entry_group) - avahi_entry_group_free(a->entry_group); - - g_free(a); -} - -static void free_interface(AvahiInterfaceMonitor *m, AvahiInterface *i, gboolean send_goodbye) { - g_assert(m); - g_assert(i); - - g_message("removing interface %s.%i", i->hardware->name, i->protocol); - avahi_goodbye_interface(m->server, i, send_goodbye); - g_message("flushing..."); - avahi_packet_scheduler_flush_responses(i->scheduler); - g_message("done"); - - g_assert(!i->announcements); - - while (i->addresses) - free_address(m, i->addresses); - - avahi_packet_scheduler_free(i->scheduler); - avahi_cache_free(i->cache); - - AVAHI_LLIST_REMOVE(AvahiInterface, interface, m->interfaces, i); - AVAHI_LLIST_REMOVE(AvahiInterface, by_hardware, i->hardware->interfaces, i); - - g_free(i); -} - -static void free_hw_interface(AvahiInterfaceMonitor *m, AvahiHwInterface *hw, gboolean send_goodbye) { - g_assert(m); - g_assert(hw); - - while (hw->interfaces) - free_interface(m, hw->interfaces, send_goodbye); - - AVAHI_LLIST_REMOVE(AvahiHwInterface, hardware, m->hw_interfaces, hw); - g_hash_table_remove(m->hash_table, &hw->index); - - g_free(hw->name); - g_free(hw); -} - -static AvahiInterfaceAddress* get_address(AvahiInterfaceMonitor *m, AvahiInterface *i, const AvahiAddress *raddr) { - AvahiInterfaceAddress *ia; - - g_assert(m); - g_assert(i); - g_assert(raddr); - - for (ia = i->addresses; ia; ia = ia->address_next) - if (avahi_address_cmp(&ia->address, raddr) == 0) - return ia; - - return NULL; -} - -static int netlink_list_items(AvahiNetlink *nl, guint16 type, guint *ret_seq) { - struct nlmsghdr *n; - struct rtgenmsg *gen; - guint8 req[1024]; - - memset(&req, 0, sizeof(req)); - n = (struct nlmsghdr*) req; - n->nlmsg_len = NLMSG_LENGTH(sizeof(struct rtgenmsg)); - n->nlmsg_type = type; - n->nlmsg_flags = NLM_F_ROOT|NLM_F_MATCH|NLM_F_REQUEST; - n->nlmsg_pid = 0; - - gen = NLMSG_DATA(n); - memset(gen, 0, sizeof(struct rtgenmsg)); - gen->rtgen_family = AF_UNSPEC; - - return avahi_netlink_send(nl, n, ret_seq); -} - -static void new_interface(AvahiInterfaceMonitor *m, AvahiHwInterface *hw, guchar protocol) { - AvahiInterface *i; - - g_assert(m); - g_assert(hw); - g_assert(protocol != AF_UNSPEC); - - i = g_new(AvahiInterface, 1); - i->monitor = m; - i->hardware = hw; - i->protocol = protocol; - i->announcing = FALSE; - - AVAHI_LLIST_HEAD_INIT(AvahiInterfaceAddress, i->addresses); - AVAHI_LLIST_HEAD_INIT(AvahiAnnouncement, i->announcements); - - i->cache = avahi_cache_new(m->server, i); - i->scheduler = avahi_packet_scheduler_new(m->server, i); - - AVAHI_LLIST_PREPEND(AvahiInterface, by_hardware, hw->interfaces, i); - AVAHI_LLIST_PREPEND(AvahiInterface, interface, m->interfaces, i); -} - -static void check_interface_relevant(AvahiInterfaceMonitor *m, AvahiInterface *i) { - gboolean b; - - g_assert(m); - g_assert(i); - - b = avahi_interface_relevant(i); - - if (b && !i->announcing) { - g_message("New relevant interface %s.%i", i->hardware->name, i->protocol); - - if (i->protocol == AF_INET) - avahi_mdns_mcast_join_ipv4 (i->hardware->index, m->server->fd_ipv4); - if (i->protocol == AF_INET6) - avahi_mdns_mcast_join_ipv6 (i->hardware->index, m->server->fd_ipv6); - - i->announcing = TRUE; - avahi_announce_interface(m->server, i); - } else if (!b && i->announcing) { - g_message("Interface %s.%i no longer relevant", i->hardware->name, i->protocol); - - avahi_goodbye_interface(m->server, i, FALSE); - - if (i->protocol == AF_INET) - avahi_mdns_mcast_leave_ipv4 (i->hardware->index, m->server->fd_ipv4); - if (i->protocol == AF_INET6) - avahi_mdns_mcast_leave_ipv6 (i->hardware->index, m->server->fd_ipv6); - - i->announcing = FALSE; - } -} - -static void check_hw_interface_relevant(AvahiInterfaceMonitor *m, AvahiHwInterface *hw) { - AvahiInterface *i; - - g_assert(m); - g_assert(hw); - - for (i = hw->interfaces; i; i = i->by_hardware_next) - check_interface_relevant(m, i); -} - -static void callback(AvahiNetlink *nl, struct nlmsghdr *n, gpointer userdata) { - AvahiInterfaceMonitor *m = userdata; - - g_assert(m); - g_assert(n); - g_assert(m->netlink == nl); - - if (n->nlmsg_type == RTM_NEWLINK) { - struct ifinfomsg *ifinfomsg = NLMSG_DATA(n); - AvahiHwInterface *hw; - struct rtattr *a = NULL; - size_t l; - - if (ifinfomsg->ifi_family != AF_UNSPEC) - return; - - if (!(hw = g_hash_table_lookup(m->hash_table, &ifinfomsg->ifi_index))) { - hw = g_new(AvahiHwInterface, 1); - hw->monitor = m; - hw->name = NULL; - hw->flags = 0; - hw->mtu = 1500; - hw->index = ifinfomsg->ifi_index; - - AVAHI_LLIST_HEAD_INIT(AvahiInterface, hw->interfaces); - AVAHI_LLIST_PREPEND(AvahiHwInterface, hardware, m->hw_interfaces, hw); - - g_hash_table_insert(m->hash_table, &hw->index, hw); - - if (m->server->fd_ipv4 >= 0) - new_interface(m, hw, AF_INET); - if (m->server->fd_ipv6 >= 0) - new_interface(m, hw, AF_INET6); - } - - hw->flags = ifinfomsg->ifi_flags; - - l = NLMSG_PAYLOAD(n, sizeof(struct ifinfomsg)); - a = IFLA_RTA(ifinfomsg); - - while (RTA_OK(a, l)) { - switch(a->rta_type) { - case IFLA_IFNAME: - g_free(hw->name); - hw->name = g_strndup(RTA_DATA(a), RTA_PAYLOAD(a)); - break; - - case IFLA_MTU: - g_assert(RTA_PAYLOAD(a) == sizeof(unsigned int)); - hw->mtu = *((unsigned int*) RTA_DATA(a)); - break; - - default: - ; - } - - a = RTA_NEXT(a, l); - } - - update_hw_interface_rr(m, hw, FALSE); - check_hw_interface_relevant(m, hw); - - } else if (n->nlmsg_type == RTM_DELLINK) { - struct ifinfomsg *ifinfomsg = NLMSG_DATA(n); - AvahiHwInterface *hw; - AvahiInterface *i; - - if (ifinfomsg->ifi_family != AF_UNSPEC) - return; - - if (!(hw = avahi_interface_monitor_get_hw_interface(m, ifinfomsg->ifi_index))) - return; - - update_hw_interface_rr(m, hw, TRUE); - free_hw_interface(m, hw, FALSE); - - } else if (n->nlmsg_type == RTM_NEWADDR || n->nlmsg_type == RTM_DELADDR) { - - struct ifaddrmsg *ifaddrmsg = NLMSG_DATA(n); - AvahiInterface *i; - struct rtattr *a = NULL; - size_t l; - AvahiAddress raddr; - int raddr_valid = 0; - - if (ifaddrmsg->ifa_family != AF_INET && ifaddrmsg->ifa_family != AF_INET6) - return; - - if (!(i = (AvahiInterface*) avahi_interface_monitor_get_interface(m, ifaddrmsg->ifa_index, ifaddrmsg->ifa_family))) - return; - - raddr.family = ifaddrmsg->ifa_family; - - l = NLMSG_PAYLOAD(n, sizeof(struct ifinfomsg)); - a = IFA_RTA(ifaddrmsg); - - while (RTA_OK(a, l)) { - switch(a->rta_type) { - case IFA_ADDRESS: - if ((raddr.family == AF_INET6 && RTA_PAYLOAD(a) != 16) || - (raddr.family == AF_INET && RTA_PAYLOAD(a) != 4)) - return; - - memcpy(raddr.data.data, RTA_DATA(a), RTA_PAYLOAD(a)); - raddr_valid = 1; - - break; - - default: - ; - } - - a = RTA_NEXT(a, l); - } - - - if (!raddr_valid) - return; - - if (n->nlmsg_type == RTM_NEWADDR) { - AvahiInterfaceAddress *addr; - - if (!(addr = get_address(m, i, &raddr))) { - addr = g_new(AvahiInterfaceAddress, 1); - addr->monitor = m; - addr->address = raddr; - addr->interface = i; - addr->entry_group = NULL; - - AVAHI_LLIST_PREPEND(AvahiInterfaceAddress, address, i->addresses, addr); - } - - addr->flags = ifaddrmsg->ifa_flags; - addr->scope = ifaddrmsg->ifa_scope; - - update_address_rr(m, addr, FALSE); - check_interface_relevant(m, i); - } else { - AvahiInterfaceAddress *addr; - - if (!(addr = get_address(m, i, &raddr))) - return; - - update_address_rr(m, addr, TRUE); - free_address(m, addr); - - check_interface_relevant(m, i); - } - - } else if (n->nlmsg_type == NLMSG_DONE) { - - if (m->list == LIST_IFACE) { - m->list = LIST_DONE; - - if (netlink_list_items(m->netlink, RTM_GETADDR, &m->query_addr_seq) < 0) - g_warning("NETLINK: Failed to list addrs: %s", strerror(errno)); - else - m->list = LIST_ADDR; - } else { - m->list = LIST_DONE; - g_message("Enumeration complete"); - } - - } else if (n->nlmsg_type == NLMSG_ERROR && (n->nlmsg_seq == m->query_link_seq || n->nlmsg_seq == m->query_addr_seq)) { - struct nlmsgerr *e = NLMSG_DATA (n); - - if (e->error) - g_warning("NETLINK: Failed to browse: %s", strerror(-e->error)); - } -} - -AvahiInterfaceMonitor *avahi_interface_monitor_new(AvahiServer *s) { - AvahiInterfaceMonitor *m = NULL; - - m = g_new0(AvahiInterfaceMonitor, 1); - m->server = s; - if (!(m->netlink = avahi_netlink_new(s->context, G_PRIORITY_DEFAULT-10, RTMGRP_LINK|RTMGRP_IPV4_IFADDR|RTMGRP_IPV6_IFADDR, callback, m))) - goto fail; - - m->hash_table = g_hash_table_new(g_int_hash, g_int_equal); - - AVAHI_LLIST_HEAD_INIT(AvahiInterface, m->interfaces); - AVAHI_LLIST_HEAD_INIT(AvahiHwInterface, m->hw_interfaces); - - if (netlink_list_items(m->netlink, RTM_GETLINK, &m->query_link_seq) < 0) - goto fail; - - m->list = LIST_IFACE; - - return m; - -fail: - avahi_interface_monitor_free(m); - return NULL; -} - -void avahi_interface_monitor_sync(AvahiInterfaceMonitor *m) { - g_assert(m); - - while (m->list != LIST_DONE) { - if (!avahi_netlink_work(m->netlink, TRUE)) - break; - } -} - -void avahi_interface_monitor_free(AvahiInterfaceMonitor *m) { - g_assert(m); - - while (m->hw_interfaces) - free_hw_interface(m, m->hw_interfaces, TRUE); - - g_assert(!m->interfaces); - - - if (m->netlink) - avahi_netlink_free(m->netlink); - - if (m->hash_table) - g_hash_table_destroy(m->hash_table); - - g_free(m); -} - - -AvahiInterface* avahi_interface_monitor_get_interface(AvahiInterfaceMonitor *m, gint index, guchar protocol) { - AvahiHwInterface *hw; - AvahiInterface *i; - - g_assert(m); - g_assert(index > 0); - g_assert(protocol != AF_UNSPEC); - - if (!(hw = avahi_interface_monitor_get_hw_interface(m, index))) - return NULL; - - for (i = hw->interfaces; i; i = i->by_hardware_next) - if (i->protocol == protocol) - return i; - - return NULL; -} - -AvahiHwInterface* avahi_interface_monitor_get_hw_interface(AvahiInterfaceMonitor *m, gint index) { - g_assert(m); - g_assert(index > 0); - - return g_hash_table_lookup(m->hash_table, &index); -} - - -void avahi_interface_send_packet(AvahiInterface *i, AvahiDnsPacket *p) { - g_assert(i); - g_assert(p); - - if (avahi_interface_relevant(i)) { - g_message("sending on '%s.%i'", i->hardware->name, i->protocol); - - if (i->protocol == AF_INET && i->monitor->server->fd_ipv4 >= 0) - avahi_send_dns_packet_ipv4(i->monitor->server->fd_ipv4, i->hardware->index, p); - else if (i->protocol == AF_INET6 && i->monitor->server->fd_ipv6 >= 0) - avahi_send_dns_packet_ipv6(i->monitor->server->fd_ipv6, i->hardware->index, p); - } -} - -void avahi_interface_post_query(AvahiInterface *i, AvahiKey *key, gboolean immediately) { - g_assert(i); - g_assert(key); - - if (avahi_interface_relevant(i)) - avahi_packet_scheduler_post_query(i->scheduler, key, immediately); -} - - -void avahi_interface_post_response(AvahiInterface *i, const AvahiAddress *a, AvahiRecord *record, gboolean flush_cache, gboolean immediately) { - g_assert(i); - g_assert(record); - - if (avahi_interface_relevant(i)) - avahi_packet_scheduler_post_response(i->scheduler, a, record, flush_cache, immediately); -} - -void avahi_interface_post_probe(AvahiInterface *i, AvahiRecord *record, gboolean immediately) { - g_assert(i); - g_assert(record); - - if (avahi_interface_relevant(i)) - avahi_packet_scheduler_post_probe(i->scheduler, record, immediately); -} - -void avahi_dump_caches(AvahiInterfaceMonitor *m, FILE *f) { - AvahiInterface *i; - g_assert(m); - - for (i = m->interfaces; i; i = i->interface_next) { - if (avahi_interface_relevant(i)) { - fprintf(f, "\n;;; INTERFACE %s.%i ;;;\n", i->hardware->name, i->protocol); - avahi_cache_dump(i->cache, f); - } - } - fprintf(f, "\n"); -} - -gboolean avahi_interface_relevant(AvahiInterface *i) { - g_assert(i); - - return - (i->hardware->flags & IFF_UP) && - (i->hardware->flags & IFF_RUNNING) && - !(i->hardware->flags & IFF_LOOPBACK) && - (i->hardware->flags & IFF_MULTICAST) && - i->addresses; -} - -gboolean avahi_interface_address_relevant(AvahiInterfaceAddress *a) { - g_assert(a); - - return a->scope == RT_SCOPE_UNIVERSE; -} - - -gboolean avahi_interface_match(AvahiInterface *i, gint index, guchar protocol) { - g_assert(i); - - if (index > 0 && index != i->hardware->index) - return FALSE; - - if (protocol != AF_UNSPEC && protocol != i->protocol) - return FALSE; - - return TRUE; -} - - -void avahi_interface_monitor_walk(AvahiInterfaceMonitor *m, gint interface, guchar protocol, AvahiInterfaceMonitorWalkCallback callback, gpointer userdata) { - g_assert(m); - g_assert(callback); - - if (interface > 0) { - if (protocol != AF_UNSPEC) { - AvahiInterface *i; - - if ((i = avahi_interface_monitor_get_interface(m, interface, protocol))) - callback(m, i, userdata); - - } else { - AvahiHwInterface *hw; - AvahiInterface *i; - - if ((hw = avahi_interface_monitor_get_hw_interface(m, interface))) - for (i = hw->interfaces; i; i = i->by_hardware_next) - if (avahi_interface_match(i, interface, protocol)) - callback(m, i, userdata); - } - - } else { - AvahiInterface *i; - - for (i = m->interfaces; i; i = i->interface_next) - if (avahi_interface_match(i, interface, protocol)) - callback(m, i, userdata); - } -}