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vnetwork.c
3186 lines (2742 loc) · 101 KB
/
vnetwork.c
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/*
Copyright (c) 2009 Eucalyptus Systems, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, only version 3 of the License.
This file 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 General Public License
for more details.
You should have received a copy of the GNU General Public License along
with this program. If not, see <http://www.gnu.org/licenses/>.
Please contact Eucalyptus Systems, Inc., 130 Castilian
Dr., Goleta, CA 93101 USA or visit <http://www.eucalyptus.com/licenses/>
if you need additional information or have any questions.
This file may incorporate work covered under the following copyright and
permission notice:
Software License Agreement (BSD License)
Copyright (c) 2008, Regents of the University of California
Redistribution and use of this software in source and binary forms, with
or without modification, are permitted provided that the following
conditions are met:
Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. USERS OF
THIS SOFTWARE ACKNOWLEDGE THE POSSIBLE PRESENCE OF OTHER OPEN SOURCE
LICENSED MATERIAL, COPYRIGHTED MATERIAL OR PATENTED MATERIAL IN THIS
SOFTWARE, AND IF ANY SUCH MATERIAL IS DISCOVERED THE PARTY DISCOVERING
IT MAY INFORM DR. RICH WOLSKI AT THE UNIVERSITY OF CALIFORNIA, SANTA
BARBARA WHO WILL THEN ASCERTAIN THE MOST APPROPRIATE REMEDY, WHICH IN
THE REGENTS' DISCRETION MAY INCLUDE, WITHOUT LIMITATION, REPLACEMENT
OF THE CODE SO IDENTIFIED, LICENSING OF THE CODE SO IDENTIFIED, OR
WITHDRAWAL OF THE CODE CAPABILITY TO THE EXTENT NEEDED TO COMPLY WITH
ANY SUCH LICENSES OR RIGHTS.
*/
#define _FILE_OFFSET_BITS 64 // so large-file support works on 32-bit systems
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <math.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <pthread.h>
#include <sys/types.h>
#include <fcntl.h>
#include <stdarg.h>
#include <ifaddrs.h>
#include <math.h> /* log2 */
#include <sys/socket.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <sys/ioctl.h>
#include <net/if.h>
#include <vnetwork.h>
#include <misc.h>
#include <hash.h>
char *iptablesCache=NULL;
int vnetInit(vnetConfig *vnetconfig, char *mode, char *eucahome, char *path, int role, char *pubInterface, char *privInterface, char *numberofaddrs, char *network, char *netmask, char *broadcast, char *nameserver, char *domainname, char *router, char *daemon, char *dhcpuser, char *bridgedev, char *localIp, char *macPrefix) {
uint32_t nw=0, nm=0, unw=0, unm=0, dns=0, bc=0, rt=0, rc=0, slashnet=0, *ips=NULL, *nms=NULL;
int vlan=0, numaddrs=1, len, i;
char cmd[256];
// if (param_check("vnetInit", vnetconfig, mode, eucahome, path, role, pubInterface, numberofaddrs, network, netmask, broadcast, nameserver, router, daemon, bridgedev)) return(1);
if (!vnetconfig->initialized) {
bzero(vnetconfig, sizeof(vnetConfig));
// always need 'mode' set
if (mode) {
safe_strncpy(vnetconfig->mode, mode, 32);
} else {
logprintfl(EUCAERROR, "vnetInit(): VNET_MODE is not set\n");
return(1);
}
if (role != CLC && role != NC) {
logprintfl(EUCAERROR, "vnetInit(): bad role specified\n");
return(1);
}
//check mode specific parameters
if (!strcmp(mode, "SYSTEM")) {
if (role == CLC) {
} else if (role == NC) {
if (!bridgedev || check_bridge(bridgedev)) {
logprintfl (EUCAERROR, "vnetInit(): cannot verify VNET_BRIDGE(%s), please check parameters and bridge device\n", SP(bridgedev));
return(1);
}
}
} else if (!strcmp(mode, "STATIC") || !strcmp(mode, "STATIC-DYNMAC")) {
if (role == CLC) {
if (!daemon || check_file(daemon)) {
logprintfl(EUCAERROR, "vnetInit(): cannot verify VNET_DHCPDAEMON (%s), please check parameter and location\n", SP(daemon));
return(1);
}
if (!privInterface || check_device(privInterface)) {
logprintfl(EUCAERROR, "vnetInit(): cannot verify VNET_PRIVINTERFACE (%s), please check parameter and device name\n", SP(privInterface));
return(1);
}
if (!network || !netmask || !broadcast || !nameserver || !router) {
logprintfl(EUCAERROR, "vnetInit(): cannot verify network settings (VNET_SUBNET(%s), VNET_NETMASK(%s), VNET_BROADCAST(%s), VNET_DNS(%s), VNET_ROUTER(%s)), please check parameters\n", SP(network), SP(netmask), SP(broadcast), SP(nameserver), SP(router));
return(1);
}
} else if (role == NC) {
if (!strcmp(mode, "STATIC-DYNMAC")) {
if (!pubInterface || check_device(pubInterface)) {
logprintfl(EUCAERROR, "vnetInit(): cannot verify VNET_PUBINTERFACE(%s), please check parameters and device\n", SP(pubInterface));
return(1);
}
}
}
} else if (!strcmp(mode, "MANAGED-NOVLAN")) {
if (role == CLC) {
if (!daemon || check_file(daemon)) {
logprintfl(EUCAERROR, "vnetInit(): cannot verify VNET_DHCPDAEMON (%s), please check parameter and location\n", SP(daemon));
return(1);
}
if (!pubInterface || check_device(pubInterface)) {
logprintfl(EUCAERROR, "vnetInit(): cannot verify VNET_PUBINTERFACE (%s), please check parameter and device name\n", SP(pubInterface));
return(1);
}
if (!privInterface || check_device(privInterface)) {
logprintfl(EUCAERROR, "vnetInit(): cannot verify VNET_PRIVINTERFACE (%s), please check parameter and device name\n", SP(privInterface));
return(1);
}
if (!network || !netmask || !nameserver) {
logprintfl(EUCAERROR, "vnetInit(): cannot verify network settings (VNET_SUBNET(%s), VNET_NETMASK(%s), VNET_DNS(%s), please check parameters\n", SP(network), SP(netmask), SP(nameserver));
return(1);
}
} else if (role == NC) {
if (!bridgedev || check_bridge(bridgedev)) {
logprintfl (EUCAERROR, "vnetInit(): cannot verify VNET_BRIDGE(%s), please check parameters and bridge device\n");
return(1);
}
}
} else if (!strcmp(mode, "MANAGED")) {
if (role == CLC) {
if (!daemon || check_file(daemon)) {
logprintfl(EUCAERROR, "vnetInit(): cannot verify VNET_DHCPDAEMON (%s), please check parameter and location\n", SP(daemon));
return(1);
}
if (!pubInterface || check_device(pubInterface)) {
logprintfl(EUCAERROR, "vnetInit(): cannot verify VNET_PUBINTERFACE (%s), please check parameter and device name\n", SP(pubInterface));
return(1);
}
if (!privInterface || check_device(privInterface)) {
logprintfl(EUCAERROR, "vnetInit(): cannot verify VNET_PRIVINTERFACE (%s), please check parameter and device name\n", SP(privInterface));
return(1);
}
if (!network || !netmask || !nameserver) {
logprintfl(EUCAERROR, "vnetInit(): cannot verify network settings (VNET_SUBNET(%s), VNET_NETMASK(%s), VNET_DNS(%s)), please check parameters\n", SP(network), SP(netmask), SP(nameserver));
return(1);
}
} else if (role == NC) {
}
} else {
logprintfl(EUCAERROR, "vnetInit(): invalid networking mode %s, please check VNET_MODE parameter\n", SP(mode));
return(1);
}
if (macPrefix) safe_strncpy(vnetconfig->macPrefix, macPrefix, 6);
if (path) safe_strncpy(vnetconfig->path, path, MAX_PATH);
if (eucahome) safe_strncpy(vnetconfig->eucahome, eucahome, MAX_PATH);
if (pubInterface) safe_strncpy(vnetconfig->pubInterface, pubInterface, 32);
if (bridgedev) safe_strncpy(vnetconfig->bridgedev, bridgedev, 32);
if (daemon) safe_strncpy(vnetconfig->dhcpdaemon, daemon, MAX_PATH);
if (privInterface) safe_strncpy(vnetconfig->privInterface, privInterface, 32);
if (dhcpuser) safe_strncpy(vnetconfig->dhcpuser, dhcpuser, 32);
if (domainname) {
safe_strncpy(vnetconfig->euca_domainname, domainname, 256);
} else {
strncpy(vnetconfig->euca_domainname, "eucalyptus", strlen("eucalyptus") + 1);
}
if (localIp) {
char *ipbuf=NULL;
ipbuf = host2ip(localIp);
if (ipbuf) {
vnetAddLocalIP(vnetconfig, dot2hex(ipbuf));
free(ipbuf);
}
}
vnetconfig->tunnels.localIpId = -1;
vnetconfig->tunnels.localIpIdLast = -1;
vnetconfig->tunnels.tunneling = 0;
vnetconfig->role = role;
vnetconfig->enabled=1;
vnetconfig->initialized = 1;
vnetconfig->max_vlan = NUMBER_OF_VLANS;
if (numberofaddrs) {
if (atoi(numberofaddrs) > NUMBER_OF_HOSTS_PER_VLAN) {
logprintfl(EUCAWARN, "vnetInit(): specified ADDRSPERNET exceeds maximum addresses per network (%d), setting to maximum.\n", NUMBER_OF_HOSTS_PER_VLAN);
vnetconfig->numaddrs = NUMBER_OF_HOSTS_PER_VLAN;
} else if (atoi(numberofaddrs) <= NUMBER_OF_CCS) {
logprintfl(EUCAWARN, "vnetInit(): specified ADDRSPERNET lower than absolute minimum (16) setting to minimum.\n");
vnetconfig->numaddrs = 16;
} else {
vnetconfig->numaddrs = atoi(numberofaddrs);
}
}
vnetconfig->addrIndexMin = NUMBER_OF_CCS+1;
vnetconfig->addrIndexMax = vnetconfig->numaddrs-2;
if (network) vnetconfig->nw = dot2hex(network);
if (netmask) vnetconfig->nm = dot2hex(netmask);
// populate networks
bzero(vnetconfig->users, sizeof(userEntry) * NUMBER_OF_VLANS);
bzero(vnetconfig->networks, sizeof(networkEntry) * NUMBER_OF_VLANS);
bzero(vnetconfig->etherdevs, NUMBER_OF_VLANS * MAX_ETH_DEV_PATH);
bzero(vnetconfig->publicips, sizeof(publicip) * NUMBER_OF_PUBLIC_IPS);
if (role != NC) {
if (network) nw = dot2hex(network);
if (netmask) nm = dot2hex(netmask);
if (nameserver) dns = dot2hex(nameserver);
if (broadcast) bc = dot2hex(broadcast);
if (router) rt = dot2hex(router);
if (numberofaddrs) numaddrs = atoi(numberofaddrs);
numaddrs-=1;
if (!strcmp(mode, "MANAGED") || !strcmp(mode, "MANAGED-NOVLAN")) {
// do some parameter checking
if ( (numaddrs+1) < 4) {
logprintfl(EUCAERROR, "vnetInit(): NUMADDRS must be >= 4, instances will not start with current value of '%d'\n", numaddrs+1);
}
// check to make sure our specified range is big enough for all VLANs
if ((0xFFFFFFFF - nm) < (NUMBER_OF_VLANS * (numaddrs+1))) {
// not big enough
vnetconfig->max_vlan = (0xFFFFFFFF - nm) / (numaddrs+1);
logprintfl(EUCAWARN, "vnetInit(): private network is not large enough to support all vlans, restricting to max vlan '%d'\n", vnetconfig->max_vlan);
if (vnetconfig->max_vlan < 2) {
logprintfl(EUCAWARN, "vnetInit(): Instances will not run with current max vlan '%d'. Either increase the size of your private subnet (VNET_SUBNET/VNET_NETMASK) or decrease the number of addrs per group (VNET_ADDRSPERNET).\n", vnetconfig->max_vlan);
}
} else {
vnetconfig->max_vlan = NUMBER_OF_VLANS;
}
// set up iptables
snprintf(cmd, 256, "%s/usr/lib/eucalyptus/euca_rootwrap iptables -L -n", vnetconfig->eucahome);
rc = system(cmd);
logprintfl(EUCADEBUG, "vnetInit(): flushing 'filter' table\n");
rc = vnetApplySingleTableRule(vnetconfig, "filter", "-F");
logprintfl(EUCADEBUG, "vnetInit(): flushing 'nat' table\n");
rc = vnetApplySingleTableRule(vnetconfig, "nat", "-F");
if (path) {
vnetLoadIPTables(vnetconfig);
}
rc = vnetApplySingleTableRule(vnetconfig, "filter", "-P FORWARD DROP");
rc = vnetApplySingleTableRule(vnetconfig, "filter", "-A FORWARD -m conntrack --ctstate ESTABLISHED -j ACCEPT");
slashnet = 32 - ((int)log2((double)(0xFFFFFFFF - nm)) + 1);
snprintf(cmd, 256, "-A FORWARD -d ! %s/%d -j ACCEPT", network, slashnet);
rc = vnetApplySingleTableRule(vnetconfig, "filter", cmd);
snprintf(cmd, 256, "-A POSTROUTING -d ! %s/%d -s %s/%d -j MASQUERADE", network, slashnet, network, slashnet);
rc = vnetApplySingleTableRule(vnetconfig, "nat", cmd);
// snprintf(cmd, 256, "-A POSTROUTING -d %s/%d -j MASQUERADE", network, slashnet);
// rc = vnetApplySingleTableRule(vnetconfig, "nat", cmd);
unm = 0xFFFFFFFF - numaddrs;
unw = nw;
for (vlan=2; vlan<vnetconfig->max_vlan; vlan++) {
vnetconfig->networks[vlan].nw = unw;
vnetconfig->networks[vlan].nm = unm;
vnetconfig->networks[vlan].bc = unw + numaddrs;
vnetconfig->networks[vlan].dns = dns;
vnetconfig->networks[vlan].router = unw+1;
unw += numaddrs + 1;
}
} else if (!strcmp(mode, "STATIC") || !strcmp(mode, "STATIC-DYNMAC")) {
for (vlan=0; vlan<vnetconfig->max_vlan; vlan++) {
vnetconfig->networks[vlan].nw = nw;
vnetconfig->networks[vlan].nm = nm;
vnetconfig->networks[vlan].bc = bc;
vnetconfig->networks[vlan].dns = dns;
vnetconfig->networks[vlan].router = rt;
vnetconfig->numaddrs = 0xFFFFFFFF - nm;
if (vnetconfig->numaddrs > NUMBER_OF_PUBLIC_IPS) {
vnetconfig->numaddrs = NUMBER_OF_PUBLIC_IPS;
}
vnetconfig->addrIndexMin = NUMBER_OF_CCS+1;
vnetconfig->addrIndexMax = vnetconfig->numaddrs-2;
}
}
} else {
if (!strcmp(vnetconfig->mode, "SYSTEM")) {
// set up iptables rule to log DHCP replies to syslog
snprintf(cmd, 256, "-A FORWARD -p udp -m udp --sport 67:68 --dport 67:68 -j LOG --log-level 6");
rc = vnetApplySingleTableRule(vnetconfig, "filter", cmd);
if (rc) {
logprintfl(EUCAWARN, "vnetInit(): could not add logging rule for DHCP replies, may not see instance IPs as they are assigned by system DHCP server");
}
}
if (strcmp(vnetconfig->mode, "MANAGED")) {
/*
// if we're not in MANAGED mode, set up ebtables
snprintf(cmd, 256, "%s/usr/lib/eucalyptus/euca_rootwrap ebtables -F FORWARD", vnetconfig->eucahome);
rc = system(cmd);
if (rc) {
logprintfl(EUCAWARN, "vnetInit(): could not flush ebtables FORWARD rules\n");
}
snprintf(cmd, 256, "%s/usr/lib/eucalyptus/euca_rootwrap ebtables -P FORWARD DROP", vnetconfig->eucahome);
rc = system(cmd);
if (rc) {
logprintfl(EUCAWARN, "vnetInit(): could set default ebtables FORWARD policy to DROP\n");
}
// forward non-VM traffic
snprintf(cmd, 256, "-A FORWARD -i %s -j ACCEPT", vnetconfig->pubInterface);
rc = vnetApplySingleEBTableRule(vnetconfig, "filter", cmd);
if (rc) {
logprintfl(EUCAWARN, "vnetInit(): could set up default ebtables rule '%s'\n", cmd);
}
// allow VM DHCP traffic
snprintf(cmd, 256, "-A FORWARD -p IPv4 -d Broadcast -i ! %s --ip-proto udp --ip-dport 67:68 -j ACCEPT", vnetconfig->pubInterface);
rc = vnetApplySingleEBTableRule(vnetconfig, "filter", cmd);
if (rc) {
logprintfl(EUCAWARN, "vnetInit(): could set up default ebtables rule '%s'\n", cmd);
}
*/
}
}
logprintfl(EUCAINFO, "vnetInit(): VNET Configuration: eucahome=%s, path=%s, dhcpdaemon=%s, dhcpuser=%s, pubInterface=%s, privInterface=%s, bridgedev=%s, networkMode=%s\n", SP(vnetconfig->eucahome), SP(vnetconfig->path), SP(vnetconfig->dhcpdaemon), SP(vnetconfig->dhcpuser), SP(vnetconfig->pubInterface), SP(vnetconfig->privInterface), SP(vnetconfig->bridgedev), SP(vnetconfig->mode));
}
return(0);
}
int vnetSetMetadataRedirect(vnetConfig *vnetconfig) {
char cmd[256];
int rc;
if (!vnetconfig) {
logprintfl(EUCAERROR, "vnetSetMetadataRedirect(): bad input params\n");
return(1);
}
//network = hex2dot(vnetconfig->nw);
//slashnet = 32 - ((int)log2((double)(0xFFFFFFFF - vnetconfig->nm)) + 1);
snprintf(cmd, 256, "%s/usr/lib/eucalyptus/euca_rootwrap ip addr add 169.254.169.254 scope link dev %s", vnetconfig->eucahome, vnetconfig->privInterface);
rc = system(cmd);
if (vnetconfig->cloudIp != 0) {
char *ipbuf;
ipbuf = hex2dot(vnetconfig->cloudIp);
// snprintf(cmd, 256, "-A PREROUTING -s %s/%d -d 169.254.169.254 -p tcp --dport 80 -j DNAT --to-destination %s:8773", network, slashnet, ipbuf);
snprintf(cmd, 256, "-A PREROUTING -d 169.254.169.254 -p tcp -m tcp --dport 80 -j DNAT --to-destination %s:8773", ipbuf);
if (ipbuf) free(ipbuf);
rc = vnetApplySingleTableRule(vnetconfig, "nat", cmd);
} else {
// snprintf(cmd, 256, "-A PREROUTING -s %s/%d -d 169.254.169.254 -p tcp --dport 80 -j DNAT --to-destination 169.254.169.254:8773", network, slashnet);
logprintfl(EUCAWARN, "vnetSetMetadataRedirect(): cloudIp is not yet set, not installing redirect rule\n");
}
// if (network) free(network);
return(0);
}
int vnetUnsetMetadataRedirect(vnetConfig *vnetconfig) {
char cmd[256];
int rc;
if (!vnetconfig) {
logprintfl(EUCAERROR, "vnetUnsetMetadataRedirect(): bad input params\n");
return(1);
}
snprintf(cmd, 256, "%s/usr/lib/eucalyptus/euca_rootwrap ip addr del 169.254.169.254 scope link dev %s", vnetconfig->eucahome, vnetconfig->privInterface);
rc = system(cmd);
if (vnetconfig->cloudIp != 0) {
char *ipbuf;
ipbuf = hex2dot(vnetconfig->cloudIp);
snprintf(cmd, 256, "-D PREROUTING -d 169.254.169.254 -p tcp -m tcp --dport 80 -j DNAT --to-destination %s:8773", ipbuf);
if (ipbuf) free(ipbuf);
rc = vnetApplySingleTableRule(vnetconfig, "nat", cmd);
} else {
logprintfl(EUCAWARN, "vnetUnsetMetadataRedirect(): cloudIp is not yet set, not installing redirect rule\n");
}
return(0);
}
int vnetInitTunnels(vnetConfig *vnetconfig) {
int done=0, ret=0, rc=0;
char file[MAX_PATH], *template=NULL, *pass=NULL;
vnetconfig->tunnels.tunneling = 0;
ret = 0;
if (!strcmp(vnetconfig->mode, "MANAGED") || !strcmp(vnetconfig->mode, "MANAGED-NOVLAN")) {
if (vnetCountLocalIP(vnetconfig) <= 0) {
// localIp not set, no tunneling
logprintfl(EUCAWARN, "vnetInitTunnels(): VNET_LOCALIP not set, tunneling is disabled\n");
return(0);
} else if (!strcmp(vnetconfig->mode, "MANAGED-NOVLAN") && check_bridge(vnetconfig->privInterface)) {
logprintfl(EUCAWARN, "vnetInitTunnels(): in MANAGED-NOVLAN mode, priv interface '%s' must be a bridge, tunneling disabled\n", vnetconfig->privInterface);
return(0);
} else {
ret = 0;
snprintf(file, MAX_PATH, "%s/var/lib/eucalyptus/keys/vtunpass", vnetconfig->eucahome);
if (check_file(file)) {
logprintfl(EUCAWARN, "vnetInitTunnels(): cannot locate tunnel password file '%s', tunneling disabled\n", file);
ret = 1;
} else if (!check_file_newer_than(file, vnetconfig->tunnels.tunpassMtime)) {
ret = 1;
logprintfl(EUCADEBUG, "vnetInitTunnels(): tunnel password file has changed, reading new value\n");
pass = file2str(file);
if (pass) {
char *newl;
newl = strchr(pass, '\n');
if (newl) *newl = '\0';
snprintf(file, MAX_PATH, "%s/etc/eucalyptus/vtunall.conf.template", vnetconfig->eucahome);
template = file2str(file);
if (template) {
replace_string(&template, "VPASS", pass);
vnetconfig->tunnels.tunpassMtime = time(NULL);
done++;
}
free(pass);
}
if (done) {
// success
snprintf(file, MAX_PATH, "%s/var/lib/eucalyptus/keys/vtunall.conf", vnetconfig->eucahome);
rc = write2file(file, template);
if (rc) {
// error
logprintfl(EUCAERROR, "vnetInitTunnels(): cannot write vtun config file '%s', tunneling disabled\n", file);
} else {
vnetconfig->tunnels.tunneling = 1;
ret = 0;
}
} else {
logprintfl(EUCAERROR, "vnetInitTunnels(): cannot set up tunnel configuration file, tunneling is disabled\n");
}
if (template) free(template);
} else {
ret=0;
}
}
}
// enable tunneling if all went well
if (!ret) {
vnetconfig->tunnels.tunneling = 1;
}
return(ret);
}
int vnetAddHost(vnetConfig *vnetconfig, char *mac, char *ip, int vlan, int idx) {
int i, done, found, start, stop;
char *newip;
if (param_check("vnetAddHost", vnetconfig, mac, ip, vlan)) return(1);
if (!vnetconfig->enabled) {
logprintfl(EUCADEBUG,"vnetAddHost(): network support is not enabled\n");
return(1);
}
if (idx < 0) {
start = vnetconfig->addrIndexMin;
stop = vnetconfig->addrIndexMax;
} else if (idx >= vnetconfig->addrIndexMin && idx <= (vnetconfig->addrIndexMax)) {
start = idx;
stop = idx;
} else {
logprintfl(EUCAERROR, "vnetAddHost(): index out of bounds: idx=%d, min=%d max=%d\n", idx, vnetconfig->addrIndexMin, vnetconfig->addrIndexMax);
return(1);
}
done=found=0;
for (i=start; i<=stop && !done; i++) {
if (!maczero(vnetconfig->networks[vlan].addrs[i].mac)) {
if (!found) found=i;
} else if (!machexcmp(mac, vnetconfig->networks[vlan].addrs[i].mac)) {
done++;
}
}
if (done) {
// duplicate IP found
logprintfl(EUCAWARN,"vnetAddHost(): attempting to add duplicate macmap entry, ignoring\n");
} else if (found) {
// strncpy(vnetconfig->networks[vlan].addrs[found].mac, mac, 24);
mac2hex(mac, vnetconfig->networks[vlan].addrs[found].mac);
if (ip) {
vnetconfig->networks[vlan].addrs[found].ip = dot2hex(ip);
} else {
newip = hex2dot(vnetconfig->networks[vlan].nw + found);
if (!newip) {
logprintfl(EUCAWARN,"vnetAddHost(): Out of memory\n");
} else {
vnetconfig->networks[vlan].addrs[found].ip = dot2hex(newip);
free(newip);
}
}
vnetconfig->networks[vlan].numhosts++;
} else {
logprintfl(EUCAERROR,"vnetAddHost(): failed to add host %s on vlan %d\n", mac, vlan);
return(1);
}
return(0);
}
int vnetDelHost(vnetConfig *vnetconfig, char *mac, char *ip, int vlan) {
int i, done;
if (param_check("vnetDelHost", vnetconfig, mac, ip, vlan)) return(1);
if (!vnetconfig->enabled) {
logprintfl(EUCADEBUG,"vnetDelHost(): network support is not enabled\n");
return(1);
}
done=0;
// for (i=2; i<NUMBER_OF_HOSTS_PER_VLAN && !done; i++) {
for (i=vnetconfig->addrIndexMin; i<=vnetconfig->addrIndexMax && !done; i++) {
// if ( (!mac || !strcmp(vnetconfig->networks[vlan].addrs[i].mac, mac)) && (!ip || (vnetconfig->networks[vlan].addrs[i].ip == dot2hex(ip)) ) ) {
if ( (!mac || !machexcmp(mac, vnetconfig->networks[vlan].addrs[i].mac)) && (!ip || (vnetconfig->networks[vlan].addrs[i].ip == dot2hex(ip)) ) ) {
bzero(&(vnetconfig->networks[vlan].addrs[i]), sizeof(netEntry));
vnetconfig->networks[vlan].numhosts--;
done++;
}
}
if (!done) {
return(1);
}
return(0);
}
int vnetRefreshHost(vnetConfig *vnetconfig, char *mac, char *ip, int vlan, int idx) {
int i, done, found, start, stop;
// if (param_check("vnetRefreshHost", vnetconfig, mac, ip, vlan)) return(1);
if (!vnetconfig->enabled) {
logprintfl(EUCADEBUG,"vnetRefreshHost(): network support is not enabled\n");
return(1);
}
if (idx < 0) {
start = vnetconfig->addrIndexMin;
stop = vnetconfig->addrIndexMax;
} else if (idx >= vnetconfig->addrIndexMin && idx <= (vnetconfig->addrIndexMax)) {
start = idx;
stop = idx;
} else {
logprintfl(EUCAERROR, "vnetRefreshHost(): index out of bounds: idx=%d, min=%d max=%d\n", idx, vnetconfig->addrIndexMin, vnetconfig->addrIndexMax);
return(1);
}
done=found=0;
for (i=start; i<=stop && !done; i++) {
if (ip) {
if (vnetconfig->networks[vlan].addrs[i].ip == dot2hex(ip)) {
found=i;
done++;
}
}
if (mac) {
if (!machexcmp(mac, vnetconfig->networks[vlan].addrs[i].mac)) {
found=i;
done++;
}
}
}
if (!done) {
return(vnetAddHost(vnetconfig, mac, ip, vlan, idx));
} else {
if (mac) {
mac2hex(mac, vnetconfig->networks[vlan].addrs[found].mac);
}
if (ip) {
vnetconfig->networks[vlan].addrs[found].ip = dot2hex(ip);
}
}
return(0);
}
int vnetEnableHost(vnetConfig *vnetconfig, char *mac, char *ip, int vlan) {
int i, done;
if (param_check("vnetEnableHost", vnetconfig, mac, ip, vlan)) return(1);
if (!vnetconfig->enabled) {
logprintfl(EUCADEBUG,"vnetEnableHost(): network support is not enabled\n");
return(1);
}
done=0;
// for (i=2; i<NUMBER_OF_HOSTS_PER_VLAN && !done; i++) {
for (i=vnetconfig->addrIndexMin; i<=vnetconfig->addrIndexMax && !done; i++) {
// if ( (!mac || !strcmp(vnetconfig->networks[vlan].addrs[i].mac, mac)) && (!ip || (vnetconfig->networks[vlan].addrs[i].ip == dot2hex(ip)) ) ) {
if ( (!mac || !machexcmp(mac, vnetconfig->networks[vlan].addrs[i].mac)) && (!ip || (vnetconfig->networks[vlan].addrs[i].ip == dot2hex(ip)) ) ) {
vnetconfig->networks[vlan].addrs[i].active=1;
done++;
}
}
if (!done) {
return(1);
}
return(0);
}
int vnetDisableHost(vnetConfig *vnetconfig, char *mac, char *ip, int vlan) {
int i, done;
if (!vnetconfig->enabled) {
logprintfl(EUCADEBUG,"vnetDisableHost(): network support is not enabled\n");
return(1);
}
done=0;
// for (i=2; i<NUMBER_OF_HOSTS_PER_VLAN && !done; i++) {
for (i=vnetconfig->addrIndexMin; i<=vnetconfig->addrIndexMax && !done; i++) {
// if ( (!mac || !strcmp(vnetconfig->networks[vlan].addrs[i].mac, mac)) && (!ip || (vnetconfig->networks[vlan].addrs[i].ip == dot2hex(ip)) ) ) {
if ( (!mac || !machexcmp(mac, vnetconfig->networks[vlan].addrs[i].mac)) && (!ip || (vnetconfig->networks[vlan].addrs[i].ip == dot2hex(ip)) ) ) {
vnetconfig->networks[vlan].addrs[i].active=0;
done++;
}
}
if (!done) {
return(1);
}
return(0);
}
int vnetDeleteChain(vnetConfig *vnetconfig, char *userName, char *netName) {
char cmd[256];
int rc, runcount;
char *hashChain=NULL, userNetString[MAX_PATH];
if (param_check("vnetDeleteChain", vnetconfig, userName, netName)) return(1);
snprintf(userNetString, MAX_PATH, "%s%s", userName, netName);
rc = hash_b64enc_string(userNetString, &hashChain);
if (rc) {
logprintfl(EUCAERROR, "vnetDeleteChain(): cannot hash user/net string (userNetString=%s)\n", userNetString);
return(1);
}
rc = check_chain(vnetconfig, userName, netName);
logprintfl(EUCADEBUG, "vnetDeleteChain(): params: userName=%s, netName=%s, rc=%d\n", SP(userName), SP(netName), rc);
if (!rc) {
snprintf(cmd, 256, "-D FORWARD -j %s", hashChain);
rc = vnetApplySingleTableRule(vnetconfig, "filter", cmd);
if (rc) {
logprintfl(EUCAERROR, "vnetDeleteChain(): '%s' failed; cannot remove link to chain %s\n", cmd, hashChain);
}
runcount=0;
while(!rc && runcount < 10) {
logprintfl(EUCADEBUG, "vnetDeleteChain(): duplicate rule found, removing others: %d/%d\n", runcount, 10);
rc = vnetApplySingleTableRule(vnetconfig, "filter", cmd);
runcount++;
}
snprintf(cmd, 256, "-F %s", hashChain);
rc = vnetApplySingleTableRule(vnetconfig, "filter", cmd);
if (rc) {
logprintfl(EUCAERROR, "vnetDeleteChain(): '%s' failed; cannot flush chain %s\n", cmd, hashChain);
}
snprintf(cmd, 256, "-X %s", hashChain);
rc = vnetApplySingleTableRule(vnetconfig, "filter", cmd);
if (rc) {
logprintfl(EUCAERROR, "vnetDeleteChain(): '%s' failed; cannot remove chain %s\n", cmd, hashChain);
}
runcount=0;
while(!rc && runcount < 10) {
logprintfl(EUCADEBUG, "vnetDeleteChain(): duplicate rule found, removing others: %d/%d\n", runcount, 10);
rc = vnetApplySingleTableRule(vnetconfig, "filter", cmd);
runcount++;
}
}
if(hashChain)
free(hashChain);
return(0);
}
int vnetCreateChain(vnetConfig *vnetconfig, char *userName, char *netName) {
char cmd[256];
int rc, ret, count;
char *hashChain=NULL, userNetString[MAX_PATH];
if (param_check("vnetCreateChain", vnetconfig, userName, netName)) return(1);
snprintf(userNetString, MAX_PATH, "%s%s", userName, netName);
rc = hash_b64enc_string(userNetString, &hashChain);
if (rc) {
logprintfl(EUCAERROR, "vnetCreateChain(): cannot hash user/net string (userNetString=%s)\n", userNetString);
return(1);
}
ret = 0;
rc = check_chain(vnetconfig, userName, netName);
if (rc) {
// snprintf(cmd, 256, "-N %s-%s", userName, netName);
snprintf(cmd, 256, "-N %s", hashChain);
rc = vnetApplySingleTableRule(vnetconfig, "filter", cmd);
if (rc) {
logprintfl(EUCAERROR, "vnetCreateChain(): '%s' failed; cannot create chain %s\n", cmd, hashChain);
ret=1;
}
}
if (!ret) {
snprintf(cmd, 256, "-D FORWARD -j %s", hashChain);
rc = vnetApplySingleTableRule(vnetconfig, "filter", cmd);
count=0;
while(!rc && count < 10) {
rc = vnetApplySingleTableRule(vnetconfig, "filter", cmd);
count++;
}
// snprintf(cmd, 256, "-A FORWARD -j %s-%s", userName, netName);
snprintf(cmd, 256, "-A FORWARD -j %s", hashChain);
rc = vnetApplySingleTableRule(vnetconfig, "filter", cmd);
if (rc) {
logprintfl(EUCAERROR, "vnetCreateChain(): '%s' failed; cannot link to chain %s\n", cmd, hashChain);
ret=1;
}
}
if (hashChain) free(hashChain);
return(ret);
}
int vnetSaveTablesToMemory(vnetConfig *vnetconfig) {
int rc, fd, ret=0, rbytes;
char *file, cmd[256];
if (!vnetconfig) {
logprintfl(EUCAERROR, "vnetSaveTablesToMemory(): bad input params\n");
return(1);
}
file = strdup("/tmp/euca-ipt-XXXXXX");
if (!file) {
return(1);
}
fd = safe_mkstemp(file);
if (fd < 0) {
free(file);
return(1);
}
chmod(file, 0644);
close(fd);
snprintf(cmd, 256, "%s/usr/lib/eucalyptus/euca_rootwrap iptables-save > %s", vnetconfig->eucahome, file);
rc = system(cmd);
if (rc) {
logprintfl(EUCAERROR, "vnetSaveTablesToMemory(): cannot save iptables state '%s'\n", cmd);
ret = 1;
} else {
fd = open(file, O_RDONLY);
if (fd < 0) {
// error
} else {
// read file
bzero(vnetconfig->iptables, 4194304);
rbytes = 0;
rc = read(fd, vnetconfig->iptables+rbytes, 4194303 - rbytes);
while(rc > 0 && rbytes <= 4194303) {
rbytes += rc;
rc = read(fd, vnetconfig->iptables+rbytes, 4194303 - rbytes);
}
close(fd);
}
}
unlink(file);
free(file);
return(ret);
}
int vnetRestoreTablesFromMemory(vnetConfig *vnetconfig) {
int rc, fd, ret=0, wbytes;
char *file, cmd[256];
FILE *FH;
if (!vnetconfig) {
logprintfl(EUCAERROR, "vnetRestoreTablesFromMemory(): bad input params\n");
return(1);
} else if (vnetconfig->iptables[0] == '\0') {
// nothing to do
return(0);
}
file = strdup("/tmp/euca-ipt-XXXXXX");
if (!file) {
return(1);
}
fd = safe_mkstemp(file);
if (fd < 0) {
free(file);
return(1);
}
chmod(file, 0644);
FH = fdopen(fd, "w");
if (!FH) {
close(fd);
unlink(file);
free(file);
return(1);
}
// write file
fprintf(FH, "%s", vnetconfig->iptables);
fclose(FH);
close(fd);
snprintf(cmd, 256, "%s/usr/lib/eucalyptus/euca_rootwrap iptables-restore < %s", vnetconfig->eucahome, file);
rc = system(cmd);
if (rc) {
logprintfl(EUCAERROR, "vnetRestoreTablesFromMemory(): cannot restore iptables state from memory '%s'\n", cmd);
ret = 1;
}
unlink(file);
free(file);
return(ret);
}
int vnetFlushTable(vnetConfig *vnetconfig, char *userName, char *netName) {
char cmd[256];
int rc;
char *hashChain=NULL, userNetString[MAX_PATH];
int ret = 1;
snprintf(userNetString, MAX_PATH, "%s%s", userName, netName);
rc = hash_b64enc_string(userNetString, &hashChain);
if (rc) {
logprintfl(EUCAERROR, "vnetFlushTable(): cannot hash user/net string (userNetString=%s)\n", userNetString);
return(1);
}
if ((userName && netName) && !check_chain(vnetconfig, userName, netName)) {
snprintf(cmd, 256, "-F %s", hashChain);
ret = vnetApplySingleTableRule(vnetconfig, "filter", cmd);
}
if(hashChain)
free(hashChain);
return ret;
}
int vnetApplySingleEBTableRule(vnetConfig *vnetconfig, char *table, char *rule) {
char cmd[MAX_PATH];
int rc;
if (!rule || !table || !vnetconfig) {
logprintfl(EUCAERROR, "vnetApplySingleEBTableRule(): bad input params: table=%s, rule=%s\n", SP(table), SP(rule));
return(1);
}
snprintf(cmd, MAX_PATH, "%s/usr/lib/eucalyptus/euca_rootwrap ebtables -t %s %s\n", vnetconfig->eucahome, table, rule);
logprintfl(EUCADEBUG, "vnetApplySingleEBTableRule(): running cmd '%s'\n", cmd);
rc = system(cmd);
rc = rc>>8;
return(rc);
}
int vnetApplySingleTableRule(vnetConfig *vnetconfig, char *table, char *rule) {
int rc, fd, ret=0;
char *file, cmd[256];
FILE *FH;
if (!rule || !table || !vnetconfig) {
logprintfl(EUCAERROR, "vnetApplySingleTableRule(): bad input params: table=%s, rule=%s\n", SP(table), SP(rule));
return(1);
}
logprintfl(EUCADEBUG, "vnetApplySingleTableRule(): applying single table (%s) rule (%s)\n", table, rule);
file = strdup("/tmp/euca-ipt-XXXXXX");
if (!file) {
return(1);
}
fd = safe_mkstemp(file);
if (fd < 0) {
free(file);
return(1);
}
chmod(file, 0644);
FH = fdopen(fd, "w");
if (!FH) {
close(fd);
unlink(file);
free(file);
return(1);
}
fprintf(FH, "%s\n", rule);
fclose(FH);
close(fd);
snprintf(cmd, 256, "%s/usr/lib/eucalyptus/euca_rootwrap %s/usr/share/eucalyptus/euca_ipt %s %s", vnetconfig->eucahome, vnetconfig->eucahome, table, file);
// logprintfl(EUCADEBUG, "running cmd '%s'\n", cmd);
rc = system(cmd);
if (rc) {
ret = 1;
}
unlink(file);
free(file);
rc = vnetSaveTablesToMemory(vnetconfig);
return(ret);
}
int vnetTableRule(vnetConfig *vnetconfig, char *type, char *destUserName, char *destName, char *sourceUserName, char *sourceNet, char *sourceNetName, char *protocol, int minPort, int maxPort) {
int i, rc, done, destVlan, srcVlan, slashnet;
char rule[1024], newrule[1024], srcNet[32], dstNet[32];
char *tmp;
char *hashChain=NULL, userNetString[MAX_PATH];
// logprintfl(EUCADEBUG, "vnetTableRule(): input: %s,%s,%s,%s,%s,%s,%d,%d\n",destUserName, destName, sourceUserName, sourceNet,sourceNetName,protocol,minPort,maxPort);
if (param_check("vnetTableRule", vnetconfig, type, destUserName, destName, sourceNet, sourceUserName, sourceNetName)) return(1);
snprintf(userNetString, MAX_PATH, "%s%s", destUserName, destName);
rc = hash_b64enc_string(userNetString, &hashChain);
if (rc) {
logprintfl(EUCAERROR, "vnetTablRule(): cannot hash user/net string (userNetString=%s)\n", userNetString);
return(1);
}
destVlan = vnetGetVlan(vnetconfig, destUserName, destName);
if (destVlan < 0) {
logprintfl(EUCAERROR,"vnetTableRule(): no vlans associated with active network %s/%s\n", destUserName, destName);
if(hashChain)
free(hashChain);
return(1);
}
slashnet = 32 - ((int)(log2((double)((0xFFFFFFFF - vnetconfig->networks[destVlan].nm)+1))));
tmp = hex2dot(vnetconfig->networks[destVlan].nw);
snprintf(dstNet, 32, "%s/%d", tmp, slashnet);
free(tmp);
if (sourceNetName) {
srcVlan = vnetGetVlan(vnetconfig, sourceUserName, sourceNetName);
if (srcVlan < 0) {
logprintfl(EUCAWARN,"vnetTableRule(): cannot locate active source vlan for network %s/%s, skipping\n", sourceUserName, sourceNetName);
if(hashChain)
free(hashChain);
return(0);
} else {
tmp = hex2dot(vnetconfig->networks[srcVlan].nw);
snprintf(srcNet, 32, "%s/%d", tmp, slashnet);
free(tmp);