From a3f8ceb929420a0be2b2c8341382fdfe0a50b859 Mon Sep 17 00:00:00 2001 From: Lennart Poettering Date: Tue, 11 Oct 2005 19:52:38 +0000 Subject: [PATCH] Split off linux specific parts of iface.[ch] into iface-linux.[ch]. This should ease porting to other platforms. Sebest, Lathiat this is for you! It Should simplify your porting work to *BSD/MacOSX/Solaris. git-svn-id: file:///home/lennart/svn/public/avahi/trunk@726 941a03a8-eaeb-0310-b9a0-b1bbd8fe43fe --- avahi-core/Makefile.am | 1 + avahi-core/announce.c | 2 +- avahi-core/iface-linux.c | 266 +++++++++++++++++++++++ avahi-core/iface-linux.h | 42 ++++ avahi-core/iface.c | 456 ++++++++++++--------------------------- avahi-core/iface.h | 86 +++++--- avahi-core/netlink.h | 1 + avahi-core/server.c | 12 +- 8 files changed, 508 insertions(+), 358 deletions(-) create mode 100644 avahi-core/iface-linux.c create mode 100644 avahi-core/iface-linux.h diff --git a/avahi-core/Makefile.am b/avahi-core/Makefile.am index 9a2c098..643c2a3 100644 --- a/avahi-core/Makefile.am +++ b/avahi-core/Makefile.am @@ -47,6 +47,7 @@ noinst_PROGRAMS = \ libavahi_core_la_SOURCES = \ timeeventq.c timeeventq.h\ iface.c iface.h \ + iface-linux.c iface-linux.h \ netlink.c netlink.h \ server.c server.h \ prioq.c prioq.h \ diff --git a/avahi-core/announce.c b/avahi-core/announce.c index 33d52aa..8796621 100644 --- a/avahi-core/announce.c +++ b/avahi-core/announce.c @@ -445,7 +445,7 @@ void avahi_goodbye_interface(AvahiServer *s, AvahiInterface *i, int goodbye) { /* avahi_log_debug("goodbye interface: %s.%u", i->hardware->name, i->protocol); */ - if (goodbye && avahi_interface_relevant(i)) { + if (goodbye && avahi_interface_is_relevant(i)) { AvahiEntry *e; for (e = s->entries; e; e = e->entries_next) diff --git a/avahi-core/iface-linux.c b/avahi-core/iface-linux.c new file mode 100644 index 0000000..5e16d6a --- /dev/null +++ b/avahi-core/iface-linux.c @@ -0,0 +1,266 @@ +/* $Id$ */ + +/*** + This file is part of avahi. + + avahi is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as + published by the Free Software Foundation; either version 2.1 of the + License, or (at your option) any later version. + + avahi is distributed in the hope that it will be useful, but WITHOUT + ANY WARRANTY; without even the implied warranty of MERCHANTABILITY + or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General + Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with avahi; if not, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 + USA. +***/ + +#ifdef HAVE_CONFIG_H +#include +#endif + +#include +#include +#include +#include + +#include + +#include "log.h" +#include "iface.h" +#include "iface-linux.h" + +static int netlink_list_items(AvahiNetlink *nl, uint16_t type, unsigned *ret_seq) { + struct nlmsghdr *n; + struct rtgenmsg *gen; + uint8_t 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_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 netlink_callback(AvahiNetlink *nl, struct nlmsghdr *n, void* userdata) { + AvahiInterfaceMonitor *m = userdata; + + assert(m); + assert(n); + assert(m->osdep.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 = avahi_interface_monitor_get_hw_interface(m, ifinfomsg->ifi_index))) + if (!(hw = avahi_hw_interface_new(m, (AvahiIfIndex) ifinfomsg->ifi_index))) + return; /* OOM */ + + /* Check whether the flags of this interface are OK for us */ + hw->flags_ok = + (ifinfomsg->ifi_flags & IFF_UP) && + (!m->server->config.use_iff_running || (ifinfomsg->ifi_flags & IFF_RUNNING)) && + !(ifinfomsg->ifi_flags & IFF_LOOPBACK) && + (ifinfomsg->ifi_flags & IFF_MULTICAST) && + !(ifinfomsg->ifi_flags & IFF_POINTOPOINT); + + + l = NLMSG_PAYLOAD(n, sizeof(struct ifinfomsg)); + a = IFLA_RTA(ifinfomsg); + + while (RTA_OK(a, l)) { + switch(a->rta_type) { + case IFLA_IFNAME: + avahi_free(hw->name); + hw->name = avahi_strndup(RTA_DATA(a), RTA_PAYLOAD(a)); + break; + + case IFLA_MTU: + assert(RTA_PAYLOAD(a) == sizeof(unsigned int)); + hw->mtu = *((unsigned int*) RTA_DATA(a)); + break; + + case IFLA_ADDRESS: { + hw->mac_address_size = RTA_PAYLOAD(a); + if (hw->mac_address_size > AVAHI_MAX_MAC_ADDRESS) + hw->mac_address_size = AVAHI_MAX_MAC_ADDRESS; + + memcpy(hw->mac_address, RTA_DATA(a), hw->mac_address_size); + break; + } + + default: + ; + } + + a = RTA_NEXT(a, l); + } + + avahi_hw_interface_check_relevant(hw); + avahi_hw_interface_update_rrs(hw, 0); + + } else if (n->nlmsg_type == RTM_DELLINK) { + struct ifinfomsg *ifinfomsg = NLMSG_DATA(n); + AvahiHwInterface *hw; + + if (ifinfomsg->ifi_family != AF_UNSPEC) + return; + + if (!(hw = avahi_interface_monitor_get_hw_interface(m, (AvahiIfIndex) ifinfomsg->ifi_index))) + return; + + avahi_hw_interface_free(hw, 0); + + } 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 = avahi_interface_monitor_get_interface(m, (AvahiIfIndex) ifaddrmsg->ifa_index, avahi_af_to_proto(ifaddrmsg->ifa_family)))) + return; + + raddr.proto = avahi_af_to_proto(ifaddrmsg->ifa_family); + + l = NLMSG_PAYLOAD(n, sizeof(struct ifaddrmsg)); + a = IFA_RTA(ifaddrmsg); + + while (RTA_OK(a, l)) { + + switch(a->rta_type) { + case IFA_ADDRESS: + if ((raddr.proto == AVAHI_PROTO_INET6 && RTA_PAYLOAD(a) != 16) || + (raddr.proto == AVAHI_PROTO_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 = avahi_interface_monitor_get_address(m, i, &raddr))) + if (!(addr = avahi_interface_address_new(m, i, &raddr, ifaddrmsg->ifa_prefixlen))) + return; /* OOM */ + + addr->global_scope = ifaddrmsg->ifa_scope == RT_SCOPE_UNIVERSE || ifaddrmsg->ifa_scope == RT_SCOPE_SITE; + } else { + AvahiInterfaceAddress *addr; + + if (!(addr = avahi_interface_monitor_get_address(m, i, &raddr))) + return; + + avahi_interface_address_free(addr); + } + + avahi_interface_check_relevant(i); + avahi_interface_update_rrs(i, 0); + + } else if (n->nlmsg_type == NLMSG_DONE) { + + if (m->osdep.list == LIST_IFACE) { + + if (netlink_list_items(m->osdep.netlink, RTM_GETADDR, &m->osdep.query_addr_seq) < 0) { + avahi_log_warn("NETLINK: Failed to list addrs: %s", strerror(errno)); + m->osdep.list = LIST_DONE; + } else + m->osdep.list = LIST_ADDR; + + } else + /* We're through */ + m->osdep.list = LIST_DONE; + + if (m->osdep.list == LIST_DONE) { + m->list_complete = 1; + avahi_interface_monitor_check_relevant(m); + avahi_interface_monitor_update_rrs(m, 0); + avahi_log_info("Network interface enumeration completed."); + } + + } else if (n->nlmsg_type == NLMSG_ERROR && + (n->nlmsg_seq == m->osdep.query_link_seq || n->nlmsg_seq == m->osdep.query_addr_seq)) { + struct nlmsgerr *e = NLMSG_DATA (n); + + if (e->error) + avahi_log_warn("NETLINK: Failed to browse: %s", strerror(-e->error)); + } +} + +int avahi_interface_monitor_init_osdep(AvahiInterfaceMonitor *m) { + assert(m); + + m->osdep.netlink = NULL; + m->osdep.query_addr_seq = m->osdep.query_link_seq = 0; + + if (!(m->osdep.netlink = avahi_netlink_new(m->server->poll_api, RTMGRP_LINK|RTMGRP_IPV4_IFADDR|RTMGRP_IPV6_IFADDR, netlink_callback, m))) + goto fail; + + if (netlink_list_items(m->osdep.netlink, RTM_GETLINK, &m->osdep.query_link_seq) < 0) + goto fail; + + m->osdep.list = LIST_IFACE; + + return 0; + +fail: + + if (m->osdep.netlink) { + avahi_netlink_free(m->osdep.netlink); + m->osdep.netlink = NULL; + } + + return -1; +} + +void avahi_interface_monitor_free_osdep(AvahiInterfaceMonitor *m) { + assert(m); + + if (m->osdep.netlink) { + avahi_netlink_free(m->osdep.netlink); + m->osdep.netlink = NULL; + } +} + +void avahi_interface_monitor_sync(AvahiInterfaceMonitor *m) { + assert(m); + + while (m->osdep.list != LIST_DONE) { + if (!avahi_netlink_work(m->osdep.netlink, 1)) + break; + } +} diff --git a/avahi-core/iface-linux.h b/avahi-core/iface-linux.h new file mode 100644 index 0000000..eed648c --- /dev/null +++ b/avahi-core/iface-linux.h @@ -0,0 +1,42 @@ +#ifndef fooifacelinuxhfoo +#define fooifacelinuxhfoo + +/* $Id$ */ + +/*** + This file is part of avahi. + + avahi is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as + published by the Free Software Foundation; either version 2.1 of the + License, or (at your option) any later version. + + avahi is distributed in the hope that it will be useful, but WITHOUT + ANY WARRANTY; without even the implied warranty of MERCHANTABILITY + or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General + Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with avahi; if not, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 + USA. +***/ + +typedef struct AvahiInterfaceMonitorOSDep AvahiInterfaceMonitorOSDep; + +#include "netlink.h" + +struct AvahiInterfaceMonitorOSDep { + AvahiNetlink *netlink; + + unsigned query_addr_seq, query_link_seq; + + enum { + LIST_IFACE, + LIST_ADDR, + LIST_DONE + } list; +}; + + +#endif diff --git a/avahi-core/iface.c b/avahi-core/iface.c index e3e2cd7..04d0bc9 100644 --- a/avahi-core/iface.c +++ b/avahi-core/iface.c @@ -26,17 +26,14 @@ #include #include #include -#include -#include #include -#include #include #include #include +#include #include "iface.h" -#include "netlink.h" #include "dns.h" #include "socket.h" #include "announce.h" @@ -45,13 +42,15 @@ #include "multicast-lookup.h" #include "querier.h" -static void update_address_rr(AvahiInterfaceMonitor *m, AvahiInterfaceAddress *a, int remove_rrs) { - assert(m); +void avahi_interface_address_update_rrs(AvahiInterfaceAddress *a, int remove_rrs) { + AvahiInterfaceMonitor *m; + assert(a); + m = a->monitor; if (a->interface->announcing && - m->list == LIST_DONE && - avahi_interface_address_relevant(a) && + m->list_complete && + avahi_interface_address_is_relevant(a) && !remove_rrs && m->server->config.publish_addresses && (m->server->state == AVAHI_SERVER_RUNNING || @@ -98,26 +97,26 @@ static void update_address_rr(AvahiInterfaceMonitor *m, AvahiInterfaceAddress *a } } -static void update_interface_rr(AvahiInterfaceMonitor *m, AvahiInterface *i, int remove_rrs) { +void avahi_interface_update_rrs(AvahiInterface *i, int remove_rrs) { AvahiInterfaceAddress *a; - assert(m); assert(i); for (a = i->addresses; a; a = a->address_next) - update_address_rr(m, a, remove_rrs); + avahi_interface_address_update_rrs(a, remove_rrs); } -static void update_hw_interface_rr(AvahiInterfaceMonitor *m, AvahiHwInterface *hw, int remove_rrs) { +void avahi_hw_interface_update_rrs(AvahiHwInterface *hw, int remove_rrs) { AvahiInterface *i; + AvahiInterfaceMonitor *m; - assert(m); assert(hw); + m = hw->monitor; for (i = hw->interfaces; i; i = i->by_hardware_next) - update_interface_rr(m, i, remove_rrs); + avahi_interface_update_rrs(i, remove_rrs); - if (m->list == LIST_DONE && + if (m->list_complete && !remove_rrs && m->server->config.publish_workstation && (m->server->state == AVAHI_SERVER_RUNNING || @@ -130,13 +129,13 @@ static void update_hw_interface_rr(AvahiInterfaceMonitor *m, AvahiHwInterface *h return; /* OOM */ if (avahi_s_entry_group_is_empty(hw->entry_group)) { - char *name; + char name[AVAHI_LABEL_MAX]; char *t; if (!(t = avahi_format_mac_address(hw->mac_address, hw->mac_address_size))) return; /* OOM */ - name = avahi_strdup_printf("%s [%s]", m->server->host_name, t); + snprintf(name, sizeof(name), "%s [%s]", m->server->host_name, t); avahi_free(t); if (!name) @@ -148,8 +147,6 @@ static void update_hw_interface_rr(AvahiInterfaceMonitor *m, AvahiHwInterface *h hw->entry_group = NULL; } else avahi_s_entry_group_commit(hw->entry_group); - - avahi_free(name); } } else { @@ -164,12 +161,20 @@ static void update_hw_interface_rr(AvahiInterfaceMonitor *m, AvahiHwInterface *h } } -static void free_address(AvahiInterfaceMonitor *m, AvahiInterfaceAddress *a) { +void avahi_interface_monitor_update_rrs(AvahiInterfaceMonitor *m, int remove_rrs) { + AvahiHwInterface *hw; + assert(m); + + for (hw = m->hw_interfaces; hw; hw = hw->hardware_next) + avahi_hw_interface_update_rrs(hw, remove_rrs); +} + +void avahi_interface_address_free(AvahiInterfaceAddress *a) { assert(a); assert(a->interface); - update_address_rr(m, a, 1); + avahi_interface_address_update_rrs(a, 1); AVAHI_LLIST_REMOVE(AvahiInterfaceAddress, address, a->interface->addresses, a); if (a->entry_group) @@ -178,12 +183,11 @@ static void free_address(AvahiInterfaceMonitor *m, AvahiInterfaceAddress *a) { avahi_free(a); } -static void free_interface(AvahiInterfaceMonitor *m, AvahiInterface *i, int send_goodbye) { - assert(m); +void avahi_interface_free(AvahiInterface *i, int send_goodbye) { assert(i); /* Handle goodbyes and remove announcers */ - avahi_goodbye_interface(m->server, i, send_goodbye); + avahi_goodbye_interface(i->monitor->server, i, send_goodbye); avahi_response_scheduler_force(i->response_scheduler); assert(!i->announcements); @@ -192,80 +196,46 @@ static void free_interface(AvahiInterfaceMonitor *m, AvahiInterface *i, int send avahi_hashmap_free(i->queriers_by_key); /* Remove local RRs */ - update_interface_rr(m, i, 1); + avahi_interface_update_rrs(i, 1); while (i->addresses) - free_address(m, i->addresses); + avahi_interface_address_free(i->addresses); avahi_response_scheduler_free(i->response_scheduler); avahi_query_scheduler_free(i->query_scheduler); avahi_probe_scheduler_free(i->probe_scheduler); avahi_cache_free(i->cache); - AVAHI_LLIST_REMOVE(AvahiInterface, interface, m->interfaces, i); + AVAHI_LLIST_REMOVE(AvahiInterface, interface, i->monitor->interfaces, i); AVAHI_LLIST_REMOVE(AvahiInterface, by_hardware, i->hardware->interfaces, i); avahi_free(i); } -static void free_hw_interface(AvahiInterfaceMonitor *m, AvahiHwInterface *hw, int send_goodbye) { - assert(m); +void avahi_hw_interface_free(AvahiHwInterface *hw, int send_goodbye) { assert(hw); - update_hw_interface_rr(m, hw, 1); + avahi_hw_interface_update_rrs(hw, 1); while (hw->interfaces) - free_interface(m, hw->interfaces, send_goodbye); + avahi_interface_free(hw->interfaces, send_goodbye); if (hw->entry_group) avahi_s_entry_group_free(hw->entry_group); - AVAHI_LLIST_REMOVE(AvahiHwInterface, hardware, m->hw_interfaces, hw); - avahi_hashmap_remove(m->hashmap, &hw->index); + AVAHI_LLIST_REMOVE(AvahiHwInterface, hardware, hw->monitor->hw_interfaces, hw); + avahi_hashmap_remove(hw->monitor->hashmap, &hw->index); avahi_free(hw->name); avahi_free(hw); } -static AvahiInterfaceAddress* get_address(AvahiInterfaceMonitor *m, AvahiInterface *i, const AvahiAddress *raddr) { - AvahiInterfaceAddress *ia; - - assert(m); - assert(i); - 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, uint16_t type, unsigned *ret_seq) { - struct nlmsghdr *n; - struct rtgenmsg *gen; - uint8_t 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_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, AvahiProtocol protocol) { +AvahiInterface* avahi_interface_new(AvahiInterfaceMonitor *m, AvahiHwInterface *hw, AvahiProtocol protocol) { AvahiInterface *i; assert(m); assert(hw); - assert(protocol != AVAHI_PROTO_UNSPEC); + assert(AVAHI_PROTO_VALID(protocol)); if (!(i = avahi_new(AvahiInterface, 1))) goto fail; /* OOM */ @@ -292,7 +262,8 @@ static void new_interface(AvahiInterfaceMonitor *m, AvahiHwInterface *hw, AvahiP AVAHI_LLIST_PREPEND(AvahiInterface, by_hardware, hw->interfaces, i); AVAHI_LLIST_PREPEND(AvahiInterface, interface, m->interfaces, i); - return; + return i; + fail: if (i) { @@ -305,18 +276,71 @@ fail: if (i->probe_scheduler) avahi_probe_scheduler_free(i->probe_scheduler); } + + return NULL; +} + +AvahiHwInterface *avahi_hw_interface_new(AvahiInterfaceMonitor *m, AvahiIfIndex idx) { + AvahiHwInterface *hw; + + assert(m); + assert(AVAHI_IF_VALID(idx)); + + if (!(hw = avahi_new(AvahiHwInterface, 1))) + return NULL; + hw->monitor = m; + hw->name = NULL; + hw->flags_ok = 0; + hw->mtu = 1500; + hw->index = idx; + hw->mac_address_size = 0; + hw->entry_group = NULL; + + AVAHI_LLIST_HEAD_INIT(AvahiInterface, hw->interfaces); + AVAHI_LLIST_PREPEND(AvahiHwInterface, hardware, m->hw_interfaces, hw); + + avahi_hashmap_insert(m->hashmap, &hw->index, hw); + + if (m->server->fd_ipv4 >= 0) + avahi_interface_new(m, hw, AVAHI_PROTO_INET); + if (m->server->fd_ipv6 >= 0) + avahi_interface_new(m, hw, AVAHI_PROTO_INET6); + + return hw; } -static void check_interface_relevant(AvahiInterfaceMonitor *m, AvahiInterface *i) { - int b; +AvahiInterfaceAddress *avahi_interface_address_new(AvahiInterfaceMonitor *m, AvahiInterface *i, const AvahiAddress *addr, unsigned prefix_len) { + AvahiInterfaceAddress *a; assert(m); assert(i); - b = avahi_interface_relevant(i); + if (!(a = avahi_new(AvahiInterfaceAddress, 1))) + return NULL; + + a->interface = i; + a->monitor = m; + a->address = *addr; + a->prefix_len = prefix_len; + a->global_scope = 0; + a->entry_group = NULL; + + AVAHI_LLIST_PREPEND(AvahiInterfaceAddress, address, i->addresses, a); + + return a; +} + +void avahi_interface_check_relevant(AvahiInterface *i) { + int b; + AvahiInterfaceMonitor *m; - if (m->list == LIST_DONE && b && !i->announcing) { + assert(i); + m = i->monitor; + + b = avahi_interface_is_relevant(i); + + if (m->list_complete && b && !i->announcing) { avahi_log_info("New relevant interface %s.%s.", i->hardware->name, avahi_proto_to_string(i->protocol)); if (i->protocol == AVAHI_PROTO_INET) @@ -347,211 +371,22 @@ static void check_interface_relevant(AvahiInterfaceMonitor *m, AvahiInterface *i } } -static void check_hw_interface_relevant(AvahiInterfaceMonitor *m, AvahiHwInterface *hw) { +void avahi_hw_interface_check_relevant(AvahiHwInterface *hw) { AvahiInterface *i; - assert(m); assert(hw); for (i = hw->interfaces; i; i = i->by_hardware_next) - check_interface_relevant(m, i); + avahi_interface_check_relevant(i); } -static void check_all_interfaces_relevant(AvahiInterfaceMonitor *m) { +void avahi_interface_monitor_check_relevant(AvahiInterfaceMonitor *m) { AvahiInterface *i; - assert(m); - for (i = m->interfaces; i; i = i->interface_next) - check_interface_relevant(m, i); -} - -static void netlink_callback(AvahiNetlink *nl, struct nlmsghdr *n, void* userdata) { - AvahiInterfaceMonitor *m = userdata; - assert(m); - assert(n); - 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 = avahi_hashmap_lookup(m->hashmap, &ifinfomsg->ifi_index))) { - - if (!(hw = avahi_new(AvahiHwInterface, 1))) - return; /* OOM */ - - hw->monitor = m; - hw->name = NULL; - hw->flags = 0; - hw->mtu = 1500; - hw->index = (AvahiIfIndex) ifinfomsg->ifi_index; - hw->mac_address_size = 0; - hw->entry_group = NULL; - - AVAHI_LLIST_HEAD_INIT(AvahiInterface, hw->interfaces); - AVAHI_LLIST_PREPEND(AvahiHwInterface, hardware, m->hw_interfaces, hw); - - avahi_hashmap_insert(m->hashmap, &hw->index, hw); - - if (m->server->fd_ipv4 >= 0) - new_interface(m, hw, AVAHI_PROTO_INET); - if (m->server->fd_ipv6 >= 0) - new_interface(m, hw, AVAHI_PROTO_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: - avahi_free(hw->name); - hw->name = avahi_strndup(RTA_DATA(a), RTA_PAYLOAD(a)); - break; - - case IFLA_MTU: - assert(RTA_PAYLOAD(a) == sizeof(unsigned int)); - hw->mtu = *((unsigned int*) RTA_DATA(a)); - break; - - case IFLA_ADDRESS: { - hw->mac_address_size = RTA_PAYLOAD(a); - if (hw->mac_address_size > AVAHI_MAX_MAC_ADDRESS) - hw->mac_address_size = AVAHI_MAX_MAC_ADDRESS; - - memcpy(hw->mac_address, RTA_DATA(a), hw->mac_address_size); - break; - } - - default: - ; - } - - a = RTA_NEXT(a, l); - } - check_hw_interface_relevant(m, hw); - update_hw_interface_rr(m, hw, 0); - - } else if (n->nlmsg_type == RTM_DELLINK) { - struct ifinfomsg *ifinfomsg = NLMSG_DATA(n); - AvahiHwInterface *hw; - - if (ifinfomsg->ifi_family != AF_UNSPEC) - return; - - if (!(hw = avahi_interface_monitor_get_hw_interface(m, (AvahiIfIndex) ifinfomsg->ifi_index))) - return; - - free_hw_interface(m, hw, 0); - - } 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, (AvahiIfIndex) ifaddrmsg->ifa_index, avahi_af_to_proto(ifaddrmsg->ifa_family)))) - return; - - raddr.proto = avahi_af_to_proto(ifaddrmsg->ifa_family); - - l = NLMSG_PAYLOAD(n, sizeof(struct ifaddrmsg)); - a = IFA_RTA(ifaddrmsg); - - while (RTA_OK(a, l)) { - - switch(a->rta_type) { - case IFA_ADDRESS: - if ((raddr.proto == AVAHI_PROTO_INET6 && RTA_PAYLOAD(a) != 16) || - (raddr.proto == AVAHI_PROTO_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))) { - if (!(addr = avahi_new(AvahiInterfaceAddress, 1))) - return; /* OOM */ - - 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; - addr->prefix_len = ifaddrmsg->ifa_prefixlen; - } else { - AvahiInterfaceAddress *addr; - - if (!(addr = get_address(m, i, &raddr))) - return; - - free_address(m, addr); - } - - check_interface_relevant(m, i); - update_interface_rr(m, i, 0); - - } else if (n->nlmsg_type == NLMSG_DONE) { - - if (m->list == LIST_IFACE) { - - if (netlink_list_items(m->netlink, RTM_GETADDR, &m->query_addr_seq) < 0) { - avahi_log_warn("NETLINK: Failed to list addrs: %s", strerror(errno)); - m->list = LIST_DONE; - } else - m->list = LIST_ADDR; - - } else - /* We're through */ - m->list = LIST_DONE; - - if (m->list == LIST_DONE) { - check_all_interfaces_relevant(m); - avahi_update_host_rrs(m, 0); - avahi_log_info("Network interface enumeration completed."); - } - - } 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) - avahi_log_warn("NETLINK: Failed to browse: %s", strerror(-e->error)); - } + for (i = m->interfaces; i; i = i->interface_next) + avahi_interface_check_relevant(i); } AvahiInterfaceMonitor *avahi_interface_monitor_new(AvahiServer *s) { @@ -561,19 +396,15 @@ AvahiInterfaceMonitor *avahi_interface_monitor_new(AvahiServer *s) { return NULL; /* OOM */ m->server = s; - if (!(m->netlink = avahi_netlink_new(s->poll_api, RTMGRP_LINK|RTMGRP_IPV4_IFADDR|RTMGRP_IPV6_IFADDR, netlink_callback, m))) - goto fail; - + m->list_complete = 0; m->hashmap = avahi_hashmap_new(avahi_int_hash, avahi_int_equal, NULL, NULL); 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) + if (avahi_interface_monitor_init_osdep(m) < 0) goto fail; - m->list = LIST_IFACE; - return m; fail: @@ -581,25 +412,15 @@ fail: return NULL; } -void avahi_interface_monitor_sync(AvahiInterfaceMonitor *m) { - assert(m); - - while (m->list != LIST_DONE) { - if (!avahi_netlink_work(m->netlink, 1)) - break; - } -} - void avahi_interface_monitor_free(AvahiInterfaceMonitor *m) { assert(m); while (m->hw_interfaces) - free_hw_interface(m, m->hw_interfaces, 1); + avahi_hw_interface_free(m->hw_interfaces, 1); assert(!m->interfaces); - - if (m->netlink) - avahi_netlink_free(m->netlink); + + avahi_interface_monitor_free_osdep(m); if (m->hashmap) avahi_hashmap_free(m->hashmap); @@ -633,12 +454,27 @@ AvahiHwInterface* avahi_interface_monitor_get_hw_interface(AvahiInterfaceMonitor return avahi_hashmap_lookup(m->hashmap, &idx); } +AvahiInterfaceAddress* avahi_interface_monitor_get_address(AvahiInterfaceMonitor *m, AvahiInterface *i, const AvahiAddress *raddr) { + AvahiInterfaceAddress *ia; + + assert(m); + assert(i); + assert(raddr); + + for (ia = i->addresses; ia; ia = ia->address_next) + if (avahi_address_cmp(&ia->address, raddr) == 0) + return ia; + + return NULL; +} + + void avahi_interface_send_packet_unicast(AvahiInterface *i, AvahiDnsPacket *p, const AvahiAddress *a, uint16_t port) { assert(i); assert(p); /* char t[64]; */ - if (!avahi_interface_relevant(i)) + if (!avahi_interface_is_relevant(i)) return; assert(!a || a->proto == i->protocol); @@ -665,7 +501,7 @@ int avahi_interface_post_query(AvahiInterface *i, AvahiKey *key, int immediately assert(i); assert(key); - if (avahi_interface_relevant(i)) + if (avahi_interface_is_relevant(i)) return avahi_query_scheduler_post(i->query_scheduler, key, immediately); return 0; @@ -675,7 +511,7 @@ int avahi_interface_post_response(AvahiInterface *i, AvahiRecord *record, int fl assert(i); assert(record); - if (avahi_interface_relevant(i)) + if (avahi_interface_is_relevant(i)) return avahi_response_scheduler_post(i->response_scheduler, record, flush_cache, querier, immediately); return 0; @@ -685,7 +521,7 @@ int avahi_interface_post_probe(AvahiInterface *i, AvahiRecord *record, int immed assert(i); assert(record); - if (avahi_interface_relevant(i)) + if (avahi_interface_is_relevant(i)) return avahi_probe_scheduler_post(i->probe_scheduler, record, immediately); return 0; @@ -696,7 +532,7 @@ int avahi_dump_caches(AvahiInterfaceMonitor *m, AvahiDumpCallback callback, void assert(m); for (i = m->interfaces; i; i = i->interface_next) { - if (avahi_interface_relevant(i)) { + if (avahi_interface_is_relevant(i)) { char ln[256]; snprintf(ln, sizeof(ln), ";;; INTERFACE %s.%s ;;;", i->hardware->name, avahi_proto_to_string(i->protocol)); callback(ln, userdata); @@ -708,7 +544,7 @@ int avahi_dump_caches(AvahiInterfaceMonitor *m, AvahiDumpCallback callback, void return 0; } -int avahi_interface_relevant(AvahiInterface *i) { +int avahi_interface_is_relevant(AvahiInterface *i) { AvahiInterfaceAddress *a; int relevant_address; @@ -717,45 +553,29 @@ int avahi_interface_relevant(AvahiInterface *i) { relevant_address = 0; for (a = i->addresses; a; a = a->address_next) - if (avahi_interface_address_relevant(a)) { + if (avahi_interface_address_is_relevant(a)) { relevant_address = 1; break; } -/* avahi_log_debug("%p. iface-relevant: %i %i %i %i %i %i", i, relevant_address, */ -/* (i->hardware->flags & IFF_UP), */ -/* (i->hardware->flags & IFF_RUNNING), */ -/* !(i->hardware->flags & IFF_LOOPBACK), */ -/* (i->hardware->flags & IFF_MULTICAST), */ -/* !(i->hardware->flags & IFF_POINTOPOINT)); */ - - return - (i->hardware->flags & IFF_UP) && - (!i->monitor->server->config.use_iff_running || (i->hardware->flags & IFF_RUNNING)) && - !(i->hardware->flags & IFF_LOOPBACK) && - (i->hardware->flags & IFF_MULTICAST) && - !(i->hardware->flags & IFF_POINTOPOINT) && - relevant_address; + return i->hardware->flags_ok && relevant_address; } -int avahi_interface_address_relevant(AvahiInterfaceAddress *a) { +int avahi_interface_address_is_relevant(AvahiInterfaceAddress *a) { AvahiInterfaceAddress *b; assert(a); /* Publish public IP addresses */ - if (a->scope == RT_SCOPE_UNIVERSE || - a->scope == RT_SCOPE_SITE) + if (a->global_scope) return 1; - - if (a->scope == RT_SCOPE_LINK) { + else { /* Publish link local IP addresses if they are the only ones on the link */ for (b = a->interface->addresses; b; b = b->address_next) { if (b == a) continue; - if (b->scope == RT_SCOPE_UNIVERSE || - b->scope == RT_SCOPE_SITE) + if (b->global_scope) return 0; } @@ -807,14 +627,6 @@ void avahi_interface_monitor_walk(AvahiInterfaceMonitor *m, AvahiIfIndex interfa } } -void avahi_update_host_rrs(AvahiInterfaceMonitor *m, int remove_rrs) { - AvahiHwInterface *hw; - - assert(m); - - for (hw = m->hw_interfaces; hw; hw = hw->hardware_next) - update_hw_interface_rr(m, hw, remove_rrs); -} int avahi_address_is_local(AvahiInterfaceMonitor *m, const AvahiAddress *a) { AvahiInterface *i; diff --git a/avahi-core/iface.h b/avahi-core/iface.h index 25eb324..e7807ff 100644 --- a/avahi-core/iface.h +++ b/avahi-core/iface.h @@ -31,7 +31,6 @@ typedef struct AvahiHwInterface AvahiHwInterface; #include #include "server.h" -#include "netlink.h" #include "cache.h" #include "response-sched.h" #include "query-sched.h" @@ -40,33 +39,30 @@ typedef struct AvahiHwInterface AvahiHwInterface; #include "announce.h" #include "browse.h" #include "querier.h" +#include "iface-linux.h" #define AVAHI_MAX_MAC_ADDRESS 32 struct AvahiInterfaceMonitor { AvahiServer *server; - AvahiNetlink *netlink; AvahiHashmap *hashmap; AVAHI_LLIST_HEAD(AvahiInterface, interfaces); AVAHI_LLIST_HEAD(AvahiHwInterface, hw_interfaces); - - unsigned query_addr_seq, query_link_seq; - - enum { - LIST_IFACE, - LIST_ADDR, - LIST_DONE - } list; + + int list_complete; + AvahiInterfaceMonitorOSDep osdep; }; struct AvahiHwInterface { - AVAHI_LLIST_FIELDS(AvahiHwInterface, hardware); AvahiInterfaceMonitor *monitor; + AVAHI_LLIST_FIELDS(AvahiHwInterface, hardware); + char *name; AvahiIfIndex index; - unsigned flags; + int flags_ok; + unsigned mtu; uint8_t mac_address[AVAHI_MAX_MAC_ADDRESS]; @@ -78,11 +74,12 @@ struct AvahiHwInterface { }; struct AvahiInterface { + AvahiInterfaceMonitor *monitor; + AvahiHwInterface *hardware; + AVAHI_LLIST_FIELDS(AvahiInterface, interface); AVAHI_LLIST_FIELDS(AvahiInterface, by_hardware); - AvahiInterfaceMonitor *monitor; - AvahiHwInterface *hardware; AvahiProtocol protocol; int announcing; @@ -100,25 +97,35 @@ struct AvahiInterface { }; struct AvahiInterfaceAddress { - AVAHI_LLIST_FIELDS(AvahiInterfaceAddress, address); AvahiInterfaceMonitor *monitor; - - unsigned char flags; - unsigned char scope; - unsigned char prefix_len; + AvahiInterface *interface; + + AVAHI_LLIST_FIELDS(AvahiInterfaceAddress, address); + AvahiAddress address; + unsigned prefix_len; + + int global_scope; AvahiSEntryGroup *entry_group; - AvahiInterface *interface; }; AvahiInterfaceMonitor *avahi_interface_monitor_new(AvahiServer *server); void avahi_interface_monitor_free(AvahiInterfaceMonitor *m); +int avahi_interface_monitor_init_osdep(AvahiInterfaceMonitor *m); +void avahi_interface_monitor_free_osdep(AvahiInterfaceMonitor *m); + void avahi_interface_monitor_sync(AvahiInterfaceMonitor *m); -AvahiInterface* avahi_interface_monitor_get_interface(AvahiInterfaceMonitor *m, AvahiIfIndex idx, AvahiProtocol protocol); -AvahiHwInterface* avahi_interface_monitor_get_hw_interface(AvahiInterfaceMonitor *m, int idx); +/* AvahiInterface */ + +AvahiInterface* avahi_interface_new(AvahiInterfaceMonitor *m, AvahiHwInterface *hw, AvahiProtocol protocol); +void avahi_interface_free(AvahiInterface *i, int send_goodbye); + +void avahi_interface_update_rrs(AvahiInterface *i, int remove_rrs); +void avahi_interface_check_relevant(AvahiInterface *i); +int avahi_interface_is_relevant(AvahiInterface *i); void avahi_interface_send_packet(AvahiInterface *i, AvahiDnsPacket *p); void avahi_interface_send_packet_unicast(AvahiInterface *i, AvahiDnsPacket *p, const AvahiAddress *a, uint16_t port); @@ -127,23 +134,44 @@ int avahi_interface_post_query(AvahiInterface *i, AvahiKey *k, int immediately); int avahi_interface_post_response(AvahiInterface *i, AvahiRecord *record, int flush_cache, const AvahiAddress *querier, int immediately); int avahi_interface_post_probe(AvahiInterface *i, AvahiRecord *p, int immediately); -int avahi_dump_caches(AvahiInterfaceMonitor *m, AvahiDumpCallback callback, void* userdata); +int avahi_interface_match(AvahiInterface *i, AvahiIfIndex idx, AvahiProtocol protocol); +int avahi_interface_address_on_link(AvahiInterface *i, const AvahiAddress *a); +int avahi_interface_has_address(AvahiInterfaceMonitor *m, AvahiIfIndex iface, const AvahiAddress *a); -int avahi_interface_relevant(AvahiInterface *i); -int avahi_interface_address_relevant(AvahiInterfaceAddress *a); +AvahiInterface* avahi_interface_monitor_get_interface(AvahiInterfaceMonitor *m, AvahiIfIndex idx, AvahiProtocol protocol); -int avahi_interface_match(AvahiInterface *i, AvahiIfIndex idx, AvahiProtocol protocol); +/* AvahiHwInterface */ + +AvahiHwInterface *avahi_hw_interface_new(AvahiInterfaceMonitor *m, AvahiIfIndex idx); +void avahi_hw_interface_free(AvahiHwInterface *hw, int send_goodbye); + +void avahi_hw_interface_update_rrs(AvahiHwInterface *hw, int remove_rrs); +void avahi_hw_interface_check_relevant(AvahiHwInterface *hw); + + AvahiHwInterface* avahi_interface_monitor_get_hw_interface(AvahiInterfaceMonitor *m, int idx); + +/* AvahiInterfaceAddress */ + +AvahiInterfaceAddress *avahi_interface_address_new(AvahiInterfaceMonitor *m, AvahiInterface *i, const AvahiAddress *addr, unsigned prefix_len); +void avahi_interface_address_update_rrs(AvahiInterfaceAddress *a, int remove_rrs); +void avahi_interface_address_free(AvahiInterfaceAddress *a); +int avahi_interface_address_is_relevant(AvahiInterfaceAddress *a); +AvahiInterfaceAddress* avahi_interface_monitor_get_address(AvahiInterfaceMonitor *m, AvahiInterface *i, const AvahiAddress *raddr); + + + + +int avahi_dump_caches(AvahiInterfaceMonitor *m, AvahiDumpCallback callback, void* userdata); typedef void (*AvahiInterfaceMonitorWalkCallback)(AvahiInterfaceMonitor *m, AvahiInterface *i, void* userdata); void avahi_interface_monitor_walk(AvahiInterfaceMonitor *m, AvahiIfIndex idx, AvahiProtocol protocol, AvahiInterfaceMonitorWalkCallback callback, void* userdata); -void avahi_update_host_rrs(AvahiInterfaceMonitor *m, int remove_rrs); +void avahi_interface_monitor_update_rrs(AvahiInterfaceMonitor *m, int remove_rrs); int avahi_address_is_local(AvahiInterfaceMonitor *m, const AvahiAddress *a); -int avahi_interface_address_on_link(AvahiInterface *i, const AvahiAddress *a); +void avahi_interface_monitor_check_relevant(AvahiInterfaceMonitor *m); -int avahi_interface_has_address(AvahiInterfaceMonitor *m, AvahiIfIndex iface, const AvahiAddress *a); #endif diff --git a/avahi-core/netlink.h b/avahi-core/netlink.h index 78f92d8..46d8e0b 100644 --- a/avahi-core/netlink.h +++ b/avahi-core/netlink.h @@ -25,6 +25,7 @@ #include #include #include +#include #include diff --git a/avahi-core/server.c b/avahi-core/server.c index 04edc24..7764635 100644 --- a/avahi-core/server.c +++ b/avahi-core/server.c @@ -850,7 +850,7 @@ static void reflect_legacy_unicast_query_packet(AvahiServer *s, AvahiDnsPacket * avahi_dns_packet_set_field(p, AVAHI_DNS_FIELD_ID, slot->id); for (j = s->monitor->interfaces; j; j = j->interface_next) - if (avahi_interface_relevant(j) && + if (avahi_interface_is_relevant(j) && j != i && (s->config.reflect_ipv || j->protocol == i->protocol)) { @@ -934,7 +934,7 @@ static void dispatch_packet(AvahiServer *s, AvahiDnsPacket *p, const struct sock assert(iface > 0); if (!(i = avahi_interface_monitor_get_interface(s->monitor, iface, avahi_af_to_proto(sa->sa_family))) || - !avahi_interface_relevant(i)) { + !avahi_interface_is_relevant(i)) { avahi_log_warn("Recieved packet from invalid interface."); return; } @@ -1027,7 +1027,7 @@ static void dispatch_legacy_unicast_packet(AvahiServer *s, AvahiDnsPacket *p, co assert(iface > 0); if (!(i = avahi_interface_monitor_get_interface(s->monitor, iface, avahi_af_to_proto(sa->sa_family))) || - !avahi_interface_relevant(i)) { + !avahi_interface_is_relevant(i)) { avahi_log_warn("Recieved packet from invalid interface."); return; } @@ -1051,7 +1051,7 @@ static void dispatch_legacy_unicast_packet(AvahiServer *s, AvahiDnsPacket *p, co } if (!(j = avahi_interface_monitor_get_interface(s->monitor, slot->interface, slot->address.proto)) || - !avahi_interface_relevant(j)) + !avahi_interface_is_relevant(j)) return; /* Patch the original ID into this response */ @@ -1133,7 +1133,7 @@ static void withdraw_host_rrs(AvahiServer *s) { if (s->browse_domain_entry_group) avahi_s_entry_group_reset(s->browse_domain_entry_group); - avahi_update_host_rrs(s->monitor, 1); + avahi_interface_monitor_update_rrs(s->monitor, 1); s->n_host_rr_pending = 0; } @@ -1253,7 +1253,7 @@ static void register_stuff(AvahiServer *s) { register_hinfo(s); register_browse_domain(s); - avahi_update_host_rrs(s->monitor, 0); + avahi_interface_monitor_update_rrs(s->monitor, 0); s->n_host_rr_pending --; -- 2.39.2