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-rw-r--r--source4/cluster/ctdb/takeover/system.c381
1 files changed, 0 insertions, 381 deletions
diff --git a/source4/cluster/ctdb/takeover/system.c b/source4/cluster/ctdb/takeover/system.c
deleted file mode 100644
index 13f3d1501b..0000000000
--- a/source4/cluster/ctdb/takeover/system.c
+++ /dev/null
@@ -1,381 +0,0 @@
-/*
- ctdb recovery code
-
- Copyright (C) Ronnie Sahlberg 2007
- Copyright (C) Andrew Tridgell 2007
-
- This library 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 3 of the License, or (at your option) any later version.
-
- This library 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 this library; if not, see <http://www.gnu.org/licenses/>.
-*/
-
-#include "includes.h"
-#include "system/network.h"
-#include "system/filesys.h"
-#include "system/wait.h"
-#include "../include/ctdb_private.h"
-#include "lib/events/events.h"
-#include <net/ethernet.h>
-#include <net/if_arp.h>
-
-
-
-/*
- send gratuitous arp reply after we have taken over an ip address
-
- saddr is the address we are trying to claim
- iface is the interface name we will be using to claim the address
- */
-int ctdb_sys_send_arp(const struct sockaddr_in *saddr, const char *iface)
-{
- int s, ret;
- struct sockaddr sa;
- struct ether_header *eh;
- struct arphdr *ah;
- struct ifreq if_hwaddr;
- unsigned char buffer[64]; /*minimum eth frame size */
- char *ptr;
-
- /* for now, we only handle AF_INET addresses */
- if (saddr->sin_family != AF_INET) {
- DEBUG(0,(__location__ " not an ipv4 address\n"));
- return -1;
- }
-
- s = socket(AF_INET, SOCK_PACKET, htons(ETHERTYPE_ARP));
- if (s == -1){
- DEBUG(0,(__location__ " failed to open raw socket\n"));
- return -1;
- }
-
- /* get the mac address */
- strcpy(if_hwaddr.ifr_name, iface);
- ret = ioctl(s, SIOCGIFHWADDR, &if_hwaddr);
- if ( ret < 0 ) {
- close(s);
- DEBUG(0,(__location__ " ioctl failed\n"));
- return -1;
- }
- if (if_hwaddr.ifr_hwaddr.sa_family != AF_LOCAL) {
- close(s);
- DEBUG(0,(__location__ " not an ethernet address\n"));
- return -1;
- }
-
-
- memset(buffer, 0 , 64);
- eh = (struct ether_header *)buffer;
- memset(eh->ether_dhost, 0xff, ETH_ALEN);
- memcpy(eh->ether_shost, if_hwaddr.ifr_hwaddr.sa_data, ETH_ALEN);
- eh->ether_type = htons(ETHERTYPE_ARP);
-
- ah = (struct arphdr *)&buffer[sizeof(struct ether_header)];
- ah->ar_hrd = htons(ARPHRD_ETHER);
- ah->ar_pro = htons(ETH_P_IP);
- ah->ar_hln = ETH_ALEN;
- ah->ar_pln = 4;
-
- /* send a gratious arp */
- ah->ar_op = htons(ARPOP_REQUEST);
- ptr = (char *)&ah[1];
- memcpy(ptr, if_hwaddr.ifr_hwaddr.sa_data, ETH_ALEN);
- ptr+=ETH_ALEN;
- memcpy(ptr, &saddr->sin_addr, 4);
- ptr+=4;
- memset(ptr, 0, ETH_ALEN);
- ptr+=ETH_ALEN;
- memcpy(ptr, &saddr->sin_addr, 4);
- ptr+=4;
-
- strncpy(sa.sa_data, iface, sizeof(sa.sa_data));
- ret = sendto(s, buffer, 64, 0, &sa, sizeof(sa));
- if (ret < 0 ){
- close(s);
- DEBUG(0,(__location__ " failed sendto\n"));
- return -1;
- }
-
- /* send unsolicited arp reply broadcast */
- ah->ar_op = htons(ARPOP_REPLY);
- ptr = (char *)&ah[1];
- memcpy(ptr, if_hwaddr.ifr_hwaddr.sa_data, ETH_ALEN);
- ptr+=ETH_ALEN;
- memcpy(ptr, &saddr->sin_addr, 4);
- ptr+=4;
- memcpy(ptr, if_hwaddr.ifr_hwaddr.sa_data, ETH_ALEN);
- ptr+=ETH_ALEN;
- memcpy(ptr, &saddr->sin_addr, 4);
- ptr+=4;
-
- strncpy(sa.sa_data, iface, sizeof(sa.sa_data));
- ret = sendto(s, buffer, 64, 0, &sa, sizeof(sa));
- if (ret < 0 ){
- DEBUG(0,(__location__ " failed sendto\n"));
- return -1;
- }
-
- close(s);
- return 0;
-}
-
-
-/*
- uint16 checksum for n bytes
- */
-static uint32_t uint16_checksum(uint16_t *data, size_t n)
-{
- uint32_t sum=0;
- while (n>=2) {
- sum += (uint32_t)ntohs(*data);
- data++;
- n -= 2;
- }
- if (n == 1) {
- sum += (uint32_t)ntohs(*(uint8_t *)data);
- }
- return sum;
-}
-
-/*
- simple TCP checksum - assumes data is multiple of 2 bytes long
- */
-static uint16_t tcp_checksum(uint16_t *data, size_t n, struct iphdr *ip)
-{
- uint32_t sum = uint16_checksum(data, n);
- uint16_t sum2;
- sum += uint16_checksum((uint16_t *)&ip->saddr, sizeof(ip->saddr));
- sum += uint16_checksum((uint16_t *)&ip->daddr, sizeof(ip->daddr));
- sum += ip->protocol + n;
- sum = (sum & 0xFFFF) + (sum >> 16);
- sum = (sum & 0xFFFF) + (sum >> 16);
- sum2 = htons(sum);
- sum2 = ~sum2;
- if (sum2 == 0) {
- return 0xFFFF;
- }
- return sum2;
-}
-
-/*
- send tcp ack packet from the specified IP/port to the specified
- destination IP/port.
-
- This is used to trigger the receiving host into sending its own ACK,
- which should trigger early detection of TCP reset by the client
- after IP takeover
- */
-int ctdb_sys_send_ack(const struct sockaddr_in *dest,
- const struct sockaddr_in *src)
-{
- int s, ret;
- uint32_t one = 1;
- struct {
- struct iphdr ip;
- struct tcphdr tcp;
- } pkt;
-
- /* for now, we only handle AF_INET addresses */
- if (src->sin_family != AF_INET || dest->sin_family != AF_INET) {
- DEBUG(0,(__location__ " not an ipv4 address\n"));
- return -1;
- }
-
- s = socket(AF_INET, SOCK_RAW, htons(IPPROTO_RAW));
- if (s == -1) {
- DEBUG(0,(__location__ " failed to open raw socket (%s)\n",
- strerror(errno)));
- return -1;
- }
-
- ret = setsockopt(s, SOL_IP, IP_HDRINCL, &one, sizeof(one));
- if (ret != 0) {
- DEBUG(0,(__location__ " failed to setup IP headers (%s)\n",
- strerror(errno)));
- close(s);
- return -1;
- }
-
- ZERO_STRUCT(pkt);
- pkt.ip.version = 4;
- pkt.ip.ihl = sizeof(pkt.ip)/4;
- pkt.ip.tot_len = htons(sizeof(pkt));
- pkt.ip.ttl = 255;
- pkt.ip.protocol = IPPROTO_TCP;
- pkt.ip.saddr = src->sin_addr.s_addr;
- pkt.ip.daddr = dest->sin_addr.s_addr;
- pkt.ip.check = 0;
-
- pkt.tcp.source = src->sin_port;
- pkt.tcp.dest = dest->sin_port;
- pkt.tcp.ack = 1;
- pkt.tcp.doff = sizeof(pkt.tcp)/4;
- pkt.tcp.window = htons(1234);
- pkt.tcp.check = tcp_checksum((uint16_t *)&pkt.tcp, sizeof(pkt.tcp), &pkt.ip);
-
- ret = sendto(s, &pkt, sizeof(pkt), 0, dest, sizeof(*dest));
- if (ret != sizeof(pkt)) {
- DEBUG(0,(__location__ " failed sendto (%s)\n", strerror(errno)));
- close(s);
- return -1;
- }
-
- close(s);
- return 0;
-}
-
-
-/*
- see if we currently have an interface with the given IP
-
- we try to bind to it, and if that fails then we don't have that IP
- on an interface
- */
-bool ctdb_sys_have_ip(const char *ip)
-{
- struct sockaddr_in sin;
- int s;
- int ret;
-
- sin.sin_port = 0;
- inet_aton(ip, &sin.sin_addr);
- sin.sin_family = AF_INET;
- s = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
- if (s == -1) {
- return false;
- }
- ret = bind(s, (struct sockaddr *)&sin, sizeof(sin));
- close(s);
- return ret == 0;
-}
-
-/*
- run the event script - varargs version
- */
-static int ctdb_event_script_v(struct ctdb_context *ctdb, const char *fmt, va_list ap)
-{
- char *options, *cmdstr;
- int ret;
- va_list ap2;
- struct stat st;
-
- if (stat(ctdb->takeover.event_script, &st) != 0 &&
- errno == ENOENT) {
- DEBUG(0,("No event script found at '%s'\n", ctdb->takeover.event_script));
- return 0;
- }
-
- va_copy(ap2, ap);
- options = talloc_vasprintf(ctdb, fmt, ap2);
- va_end(ap2);
- CTDB_NO_MEMORY(ctdb, options);
-
- cmdstr = talloc_asprintf(ctdb, "%s %s", ctdb->takeover.event_script, options);
- CTDB_NO_MEMORY(ctdb, cmdstr);
-
- ret = system(cmdstr);
- if (ret != -1) {
- ret = WEXITSTATUS(ret);
- }
-
- talloc_free(cmdstr);
- talloc_free(options);
-
- return ret;
-}
-
-/*
- run the event script
- */
-int ctdb_event_script(struct ctdb_context *ctdb, const char *fmt, ...)
-{
- va_list ap;
- int ret;
-
- va_start(ap, fmt);
- ret = ctdb_event_script_v(ctdb, fmt, ap);
- va_end(ap);
-
- return ret;
-}
-
-
-struct ctdb_event_script_state {
- struct ctdb_context *ctdb;
- pid_t child;
- void (*callback)(struct ctdb_context *, int);
- int fd[2];
-};
-
-/* called when child is finished */
-static void ctdb_event_script_handler(struct event_context *ev, struct fd_event *fde,
- uint16_t flags, void *p)
-{
- struct ctdb_event_script_state *state =
- talloc_get_type(p, struct ctdb_event_script_state);
- int status = -1;
- waitpid(state->child, &status, 0);
- if (status != -1) {
- status = WEXITSTATUS(status);
- }
- state->callback(state->ctdb, status);
- talloc_free(state);
-}
-
-
-/*
- run the event script in the background, calling the callback when
- finished
- */
-int ctdb_event_script_callback(struct ctdb_context *ctdb,
- void (*callback)(struct ctdb_context *, int),
- const char *fmt, ...)
-{
- struct ctdb_event_script_state *state;
- va_list ap;
- int ret;
-
- state = talloc(ctdb, struct ctdb_event_script_state);
- CTDB_NO_MEMORY(ctdb, state);
-
- state->ctdb = ctdb;
- state->callback = callback;
-
- ret = pipe(state->fd);
- if (ret != 0) {
- talloc_free(state);
- return -1;
- }
-
- state->child = fork();
-
- if (state->child == (pid_t)-1) {
- close(state->fd[0]);
- close(state->fd[1]);
- talloc_free(state);
- return -1;
- }
-
- if (state->child == 0) {
- close(state->fd[0]);
- va_start(ap, fmt);
- ret = ctdb_event_script_v(ctdb, fmt, ap);
- va_end(ap);
- _exit(ret);
- }
-
- close(state->fd[1]);
-
- event_add_fd(ctdb->ev, state, state->fd[0], EVENT_FD_READ|EVENT_FD_AUTOCLOSE,
- ctdb_event_script_handler, state);
-
- return 0;
-}
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