diff options
Diffstat (limited to 'filter/iftable.c')
| -rw-r--r-- | filter/iftable.c | 259 |
1 files changed, 0 insertions, 259 deletions
diff --git a/filter/iftable.c b/filter/iftable.c deleted file mode 100644 index 02a5f7e..0000000 --- a/filter/iftable.c +++ /dev/null @@ -1,259 +0,0 @@ -/* iftable - table of network interfaces - * - * (C) 2004 by Astaro AG, written by Harald Welte <hwelte@astaro.com> - * - * This software is Free Software and licensed under GNU GPLv2. - * - */ - -/* IFINDEX handling */ - -#include <unistd.h> -#include <stdlib.h> -#include <stdio.h> -#include <string.h> -#include <sys/types.h> - -#include <netinet/in.h> -#include <arpa/inet.h> - -#include <linux/netdevice.h> - -#include "rtnl.h" - -#define iftb_log(x, ...) - -struct ifindex_map { - struct ifindex_map *next; - - u_int32_t index; - u_int32_t type; - u_int32_t alen; - u_int32_t flags; - char addr[8]; - char name[16]; -}; - -static struct ifindex_map *ifindex_map[16]; - -/* iftable_dump - Dump the interface table to a given file stream - * @outfd: file stream to which table should be dumped - */ -int iftable_dump(FILE *outfd) -{ - int i; - - for (i = 0; i < 16; i++) { - struct ifindex_map *im; - for (im = ifindex_map[i]; im; im = im->next) { - fprintf(outfd, "%u %s", im->index, im->name); - if (!(im->flags & IFF_UP)) - fputs(" DOWN", outfd); - fputc('\n', outfd); - } - } - fflush(outfd); - return 0; -} - -/* iftable_add - Add/Update an entry to/in the interface table - * @n: netlink message header of a RTM_NEWLINK message - * @arg: not used - * - * This function adds/updates an entry in the intrface table. - * Returns -1 on error, 1 on success. - */ -static int iftable_add(struct nlmsghdr *n, void *arg) -{ - unsigned int hash; - struct ifinfomsg *ifi_msg = NLMSG_DATA(n); - struct ifindex_map *im, **imp; - struct rtattr *cb[IFLA_MAX+1]; - - if (n->nlmsg_type != RTM_NEWLINK) - return -1; - - if (n->nlmsg_len < NLMSG_LENGTH(sizeof(ifi_msg))) { - iftb_log(LOG_ERROR, "short message (%u < %u)", - n->nlmsg_len, NLMSG_LENGTH(sizeof(ifi_msg))); - return -1; - } - - memset(&cb, 0, sizeof(cb)); - rtnl_parse_rtattr(cb, IFLA_MAX, IFLA_RTA(ifi_msg), IFLA_PAYLOAD(n)); - if (!cb[IFLA_IFNAME]) { - iftb_log(LOG_ERROR, "interface without name?"); - return -1; - } - - hash = ifi_msg->ifi_index&0xF; - for (imp = &ifindex_map[hash]; (im=*imp)!=NULL; imp = &im->next) { - if (im->index == ifi_msg->ifi_index) { - iftb_log(LOG_DEBUG, - "updating iftable (ifindex=%u)", im->index); - break; - } - } - - if (!im) { - im = malloc(sizeof(*im)); - if (!im) { - iftb_log(LOG_ERROR, - "ENOMEM while allocating ifindex_map"); - return 0; - } - im->next = *imp; - im->index = ifi_msg->ifi_index; - *imp = im; - iftb_log(LOG_DEBUG, "creating new iftable (ifindex=%u)", - im->index); - } - - im->type = ifi_msg->ifi_type; - im->flags = ifi_msg->ifi_flags; - if (cb[IFLA_ADDRESS]) { - unsigned int alen; - im->alen = alen = RTA_PAYLOAD(cb[IFLA_ADDRESS]); - if (alen > sizeof(im->addr)) - alen = sizeof(im->addr); - memcpy(im->addr, RTA_DATA(cb[IFLA_ADDRESS]), alen); - } else { - im->alen = 0; - memset(im->addr, 0, sizeof(im->addr)); - } - strcpy(im->name, RTA_DATA(cb[IFLA_IFNAME])); - return 1; -} - -/* iftable_del - Delete an entry from the interface table - * @n: netlink message header of a RTM_DELLINK nlmsg - * @arg: not used - * - * Delete an entry from the interface table. - * Returns -1 on error, 0 if no matching entry was found or 1 on success. - */ -static int iftable_del(struct nlmsghdr *n, void *arg) -{ - struct ifinfomsg *ifi_msg = NLMSG_DATA(n); - struct rtattr *cb[IFLA_MAX+1]; - struct ifindex_map *im; - - if (n->nlmsg_type != RTM_DELLINK) { - iftb_log(LOG_ERROR, - "called with wrong nlmsg_type %u", n->nlmsg_type); - return -1; - } - - if (n->nlmsg_len < NLMSG_LENGTH(sizeof(ifi_msg))) { - iftb_log(LOG_ERROR, "short message (%u < %u)", - n->nlmsg_len, NLMSG_LENGTH(sizeof(ifi_msg))); - return -1; - } - - memset(&cb, 0, sizeof(cb)); - rtnl_parse_rtattr(cb, IFLA_MAX, IFLA_RTA(ifi_msg), IFLA_PAYLOAD(n)); - - /* FIXME */ - - return 1; -} - -/* ifindex_2name - get the name for an ifindex - * @index: ifindex to be resolved - * - * Return value: character string containing name of interface - */ -char *ifindex_2name(unsigned int index) -{ - struct ifindex_map *im; - - if (index == 0) - return ""; - for (im = ifindex_map[index&0xF]; im; im = im->next) - if (im->index == index) - return im->name; - - return NULL; -} - -/* iftable_up - Determine whether a given interface is UP - * @index: ifindex of interface - * - * Return value: -1 if interface unknown, 1 if interface up, 0 if not. - */ -int iftable_up(unsigned int index) -{ - struct ifindex_map *im; - - for (im = ifindex_map[index&0xF]; im; im = im->next) { - if (im->index == index) { - if (im->flags & IFF_UP) - return 1; - else - return 0; - } - } - return -1; -} - -static struct rtnl_handler handlers[] = { - { .nlmsg_type = RTM_NEWLINK, .handlefn = &iftable_add }, - { .nlmsg_type = RTM_DELLINK, .handlefn = &iftable_del }, -}; - -static int init_or_fini(int fini) -{ - int ret = 0; - - if (fini) - goto cleanup; - - if (rtnl_handler_register(&handlers[0]) < 0) { - ret = -1; - goto cleanup_none; - } - - if (rtnl_handler_register(&handlers[1]) < 0) { - ret = -1; - goto cleanup_0; - } - - if (rtnl_dump_type(RTM_GETLINK) < 0) { - ret = -1; - goto cleanup_1; - } - - return 0; - -#if 0 - if (rtnl_wilddump_requet(rtnl_fd, AF_UNSPEC, RTM_GETLINK) < 0) { - iftb_log(LOG_ERROR, "unable to send dump request"); - return -1; - } - -#endif - -cleanup: - -cleanup_1: - rtnl_handler_unregister(&handlers[1]); -cleanup_0: - rtnl_handler_unregister(&handlers[0]); -cleanup_none: - return ret; -} - -/* iftable_init - Initialize interface table - */ -int iftable_init(void) -{ - iftb_log(LOG_DEBUG, "%s", __FUNCTION__); - return init_or_fini(0); -} - -/* iftable_fini - Destructor of interface table - */ -void iftable_fini(void) -{ - init_or_fini(1); -} |