--- /dev/null
+#include <string.h>
+#include <sys/socket.h>
+#include <asm/types.h>
+#include <linux/netlink.h>
+#include <linux/rtnetlink.h>
+#include <errno.h>
+
+#include "iface.h"
+#include "netlink.h"
+
+typedef struct _interface_callback_info {
+ void (*callback)(flxInterfaceMonitor *m, flxInterfaceChange change, const flxInterface *i, gpointer userdata);
+ gpointer userdata;
+ struct _interface_callback_info *next;
+} interface_callback_info;
+
+typedef struct _address_callback_info {
+ void (*callback)(flxInterfaceMonitor *m, flxInterfaceChange change, const flxInterfaceAddress *i, gpointer userdata);
+ gpointer userdata;
+ struct _address_callback_info *next;
+} address_callback_info;
+
+struct _flxInterfaceMonitor {
+ flxNetlink *netlink;
+ GHashTable *hash_table;
+ interface_callback_info *interface_callbacks;
+ address_callback_info *address_callbacks;
+ flxInterface *interfaces;
+ guint query_addr_seq, query_link_seq;
+ enum { LIST_IFACE, LIST_ADDR, LIST_DONE } list;
+};
+
+static void run_interface_callbacks(flxInterfaceMonitor *m, flxInterfaceChange change, const flxInterface *i) {
+ interface_callback_info *c;
+ g_assert(m);
+ g_assert(i);
+
+ for (c = m->interface_callbacks; c; c = c->next) {
+ g_assert(c->callback);
+ c->callback(m, change, i, c->userdata);
+ }
+}
+
+static void run_address_callbacks(flxInterfaceMonitor *m, flxInterfaceChange change, const flxInterfaceAddress *a) {
+ address_callback_info *c;
+ g_assert(m);
+ g_assert(a);
+
+ for (c = m->address_callbacks; c; c = c->next) {
+ g_assert(c->callback);
+ c->callback(m, change, a, c->userdata);
+ }
+}
+
+static void free_address(flxInterfaceMonitor *m, flxInterfaceAddress *a) {
+ g_assert(m);
+ g_assert(a);
+ g_assert(a->interface);
+
+ if (a->prev)
+ a->prev->next = a->next;
+ else
+ a->interface->addresses = a->next;
+
+ if (a->next)
+ a->next->prev = a->prev;
+
+ g_free(a);
+}
+
+static void free_interface(flxInterfaceMonitor *m, flxInterface *i) {
+ g_assert(m);
+ g_assert(i);
+
+ while (i->addresses)
+ free_address(m, i->addresses);
+
+ if (i->prev)
+ i->prev->next = i->next;
+ else
+ m->interfaces = i->next;
+
+ if (i->next)
+ i->next->prev = i->prev;
+
+ g_hash_table_remove(m->hash_table, &i->index);
+
+ g_free(i->name);
+ g_free(i);
+}
+
+static flxInterfaceAddress* get_address(flxInterfaceMonitor *m, flxInterface *i, const flxAddress *raddr) {
+ flxInterfaceAddress *ia;
+
+ g_assert(m);
+ g_assert(i);
+ g_assert(raddr);
+
+ for (ia = i->addresses; ia; ia = ia->next) {
+ if (flx_address_cmp(&ia->address, raddr) == 0)
+ return ia;
+ }
+
+ return NULL;
+}
+
+static int netlink_list_items(flxNetlink *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 flx_netlink_send(nl, n, ret_seq);
+}
+
+static void callback(flxNetlink *nl, struct nlmsghdr *n, gpointer userdata) {
+ flxInterfaceMonitor *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);
+ flxInterface *i;
+ struct rtattr *a = NULL;
+ size_t l;
+ int changed;
+
+ if (ifinfomsg->ifi_family != AF_UNSPEC)
+ return;
+
+ if ((i = (flxInterface*) flx_interface_monitor_get_interface(m, ifinfomsg->ifi_index)))
+ changed = 1;
+ else {
+ i = g_new0(flxInterface, 1);
+ i->index = ifinfomsg->ifi_index;
+ i->addresses = NULL;
+ if ((i->next = m->interfaces))
+ i->next->prev = i;
+ m->interfaces = i;
+ i->prev = NULL;
+ g_hash_table_insert(m->hash_table, &i->index, i);
+ changed = 0;
+ }
+
+ i->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(i->name);
+ i->name = g_strndup(RTA_DATA(a), RTA_PAYLOAD(a));
+ break;
+
+ default:
+ ;
+ }
+
+ a = RTA_NEXT(a, l);
+ }
+
+ run_interface_callbacks(m, changed ? FLX_INTERFACE_CHANGE : FLX_INTERFACE_NEW, i);
+
+ } else if (n->nlmsg_type == RTM_DELLINK) {
+ struct ifinfomsg *ifinfomsg = NLMSG_DATA(n);
+ flxInterface *i;
+ flxInterfaceAddress *a;
+
+ if (ifinfomsg->ifi_family != AF_UNSPEC)
+ return;
+
+ if (!(i = (flxInterface*) flx_interface_monitor_get_interface(m, ifinfomsg->ifi_index)))
+ return;
+
+ for (a = i->addresses; a; a = a->next)
+ run_address_callbacks(m, FLX_INTERFACE_REMOVE, a);
+
+ run_interface_callbacks(m, FLX_INTERFACE_REMOVE, i);
+
+ free_interface(m, i);
+
+ } else if (n->nlmsg_type == RTM_NEWADDR || n->nlmsg_type == RTM_DELADDR) {
+
+ struct ifaddrmsg *ifaddrmsg = NLMSG_DATA(n);
+ flxInterface *i;
+ struct rtattr *a = NULL;
+ size_t l;
+ int changed;
+ flxAddress raddr;
+ int raddr_valid = 0;
+
+ if (ifaddrmsg->ifa_family != AF_INET && ifaddrmsg->ifa_family != AF_INET6)
+ return;
+
+ if (!(i = (flxInterface*) flx_interface_monitor_get_interface(m, ifaddrmsg->ifa_index)))
+ 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, 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) {
+ flxInterfaceAddress *addr;
+
+ if ((addr = get_address(m, i, &raddr)))
+ changed = 1;
+ else {
+ addr = g_new0(flxInterfaceAddress, 1);
+ addr->address = raddr;
+ addr->interface = i;
+ if ((addr->next = i->addresses))
+ addr->next->prev = addr;
+ i->addresses = addr;
+ addr->prev = NULL;
+
+ changed = 0;
+ }
+
+ addr->flags = ifaddrmsg->ifa_flags;
+ addr->scope = ifaddrmsg->ifa_scope;
+
+ run_address_callbacks(m, changed ? FLX_INTERFACE_CHANGE : FLX_INTERFACE_NEW, addr);
+ } else {
+ flxInterfaceAddress *addr;
+
+ if (!(addr = get_address(m, i, &raddr)))
+ return;
+
+ run_address_callbacks(m, FLX_INTERFACE_REMOVE, addr);
+ free_address(m, addr);
+ }
+
+ } 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;
+
+ } 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));
+ }
+}
+
+flxInterfaceMonitor *flx_interface_monitor_new(GMainContext *c) {
+ flxInterfaceMonitor *m = NULL;
+
+ m = g_new0(flxInterfaceMonitor, 1);
+ if (!(m->netlink = flx_netlink_new(c, 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);
+ m->interface_callbacks = NULL;
+ m->address_callbacks = NULL;
+ m->interfaces = NULL;
+
+ if (netlink_list_items(m->netlink, RTM_GETLINK, &m->query_link_seq) < 0)
+ goto fail;
+
+ m->list = LIST_IFACE;
+
+ return m;
+
+fail:
+ flx_interface_monitor_free(m);
+ return NULL;
+}
+
+void flx_interface_monitor_free(flxInterfaceMonitor *m) {
+ g_assert(m);
+
+ if (m->netlink)
+ flx_netlink_free(m->netlink);
+
+ if (m->hash_table)
+ g_hash_table_destroy(m->hash_table);
+
+ while (m->interface_callbacks) {
+ interface_callback_info *c = m->interface_callbacks;
+ m->interface_callbacks = c->next;
+ g_free(c);
+ }
+
+ while (m->address_callbacks) {
+ address_callback_info *c = m->address_callbacks;
+ m->address_callbacks = c->next;
+ g_free(c);
+ }
+
+ g_free(m);
+}
+
+
+const flxInterface* flx_interface_monitor_get_interface(flxInterfaceMonitor *m, gint index) {
+ g_assert(m);
+ g_assert(index > 0);
+
+ return g_hash_table_lookup(m->hash_table, &index);
+}
+
+void flx_interface_monitor_add_interface_callback(
+ flxInterfaceMonitor *m,
+ void (*callback)(flxInterfaceMonitor *m, flxInterfaceChange change, const flxInterface *i, gpointer userdata),
+ gpointer userdata) {
+
+ interface_callback_info *info;
+
+ g_assert(m);
+ g_assert(callback);
+
+ info = g_new(interface_callback_info, 1);
+ info->callback = callback;
+ info->userdata = userdata;
+ info->next = m->interface_callbacks;
+ m->interface_callbacks = info;
+}
+
+void flx_interface_monitor_remove_interface_callback(
+ flxInterfaceMonitor *m,
+ void (*callback)(flxInterfaceMonitor *m, flxInterfaceChange change, const flxInterface *i, gpointer userdata),
+ gpointer userdata) {
+
+ interface_callback_info *info, *prev;
+
+ g_assert(m);
+ g_assert(callback);
+
+ info = m->interface_callbacks;
+ prev = NULL;
+
+ while (info) {
+ if (info->callback == callback && info->userdata == userdata) {
+ interface_callback_info *c = info;
+
+ if (prev)
+ prev->next = c->next;
+ else
+ m->interface_callbacks = c->next;
+
+ info = c->next;
+ g_free(c);
+ } else {
+ prev = info;
+ info = info->next;
+ }
+ }
+}
+
+void flx_interface_monitor_add_address_callback(
+ flxInterfaceMonitor *m,
+ void (*callback)(flxInterfaceMonitor *m, flxInterfaceChange change, const flxInterfaceAddress *a, gpointer userdata),
+ gpointer userdata) {
+
+ address_callback_info *info;
+
+ g_assert(m);
+ g_assert(callback);
+
+ info = g_new(address_callback_info, 1);
+ info->callback = callback;
+ info->userdata = userdata;
+ info->next = m->address_callbacks;
+ m->address_callbacks = info;
+}
+
+
+void flx_interface_monitor_remove_address_callback(
+ flxInterfaceMonitor *m,
+ void (*callback)(flxInterfaceMonitor *m, flxInterfaceChange change, const flxInterfaceAddress *a, gpointer userdata),
+ gpointer userdata) {
+
+ address_callback_info *info, *prev;
+
+ g_assert(m);
+ g_assert(callback);
+
+ info = m->address_callbacks;
+ prev = NULL;
+
+ while (info) {
+ if (info->callback == callback && info->userdata == userdata) {
+ address_callback_info *c = info;
+
+ if (prev)
+ prev->next = c->next;
+ else
+ m->address_callbacks = c->next;
+
+ info = c->next;
+ g_free(c);
+ } else {
+ prev = info;
+ info = info->next;
+ }
+ }
+
+}
+
+const flxInterface* flx_interface_monitor_get_first(flxInterfaceMonitor *m) {
+ g_assert(m);
+ return m->interfaces;
+}
projects / catta / blobdiff