mirror of
https://github.com/vincentmli/bpfire.git
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7d3af7f772
ctorrent hinzugefuegt. UpdateBooster/SquidGuard gefixt. Pakfire-Archiv geaendert. git-svn-id: http://svn.ipfire.org/svn/ipfire/trunk@647 ea5c0bd1-69bd-2848-81d8-4f18e57aeed8
389 lines
9.8 KiB
C
389 lines
9.8 KiB
C
#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <fcntl.h>
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#include "setuid.h"
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#include "libsmooth.h"
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#define noovpndebug
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// global vars
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struct keyvalue *kv = NULL;
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FILE *ifacefile = NULL;
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char redif[STRING_SIZE];
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char blueif[STRING_SIZE];
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char orangeif[STRING_SIZE];
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char enablered[STRING_SIZE] = "off";
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char enableblue[STRING_SIZE] = "off";
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char enableorange[STRING_SIZE] = "off";
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// consts
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char OVPNRED[STRING_SIZE] = "OVPN";
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char OVPNBLUE[STRING_SIZE] = "OVPN_BLUE_";
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char OVPNORANGE[STRING_SIZE] = "OVPN_ORANGE_";
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char WRAPPERVERSION[STRING_SIZE] = "2.0.1.6";
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void exithandler(void)
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{
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if(kv)
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freekeyvalues(kv);
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if (ifacefile)
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fclose(ifacefile);
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}
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void usage(void)
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{
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#ifdef ovpndebug
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printf("Wrapper for OpenVPN v%s-debug\n", WRAPPERVERSION);
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#else
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printf("Wrapper for OpenVPN v%s\n", WRAPPERVERSION);
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#endif
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printf("openvpnctrl <option>\n");
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printf(" Valid options are:\n");
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printf(" -s --start\n");
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printf(" starts OpenVPN (implicitly creates chains and firewall rules)\n");
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printf(" -k --kill\n");
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printf(" kills/stops OpenVPN\n");
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printf(" -r --restart\n");
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printf(" restarts OpenVPN (implicitly creates chains and firewall rules)\n");
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printf(" -d --display\n");
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printf(" displays OpenVPN status to syslog\n");
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printf(" -fwr --firewall-rules\n");
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printf(" removes current OpenVPN chains and rules and resets them according to the config\n");
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printf(" -sdo --start-daemon-only\n");
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printf(" starts OpenVPN daemon only\n");
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printf(" -ccr --create-chains-and-rules\n");
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printf(" creates chains and rules for OpenVPN\n");
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printf(" -dcr --delete-chains-and-rules\n");
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printf(" removes all chains for OpenVPN\n");
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exit(1);
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}
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void ovpnInit(void) {
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// Read OpenVPN configuration
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kv = initkeyvalues();
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if (!readkeyvalues(kv, CONFIG_ROOT "/ovpn/settings")) {
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fprintf(stderr, "Cannot read ovpn settings\n");
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exit(1);
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}
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if (!findkey(kv, "ENABLED", enablered)) {
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fprintf(stderr, "Cannot read ENABLED\n");
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exit(1);
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}
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if (!findkey(kv, "ENABLED_BLUE", enableblue)){
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fprintf(stderr, "Cannot read ENABLED_BLUE\n");
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exit(1);
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}
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if (!findkey(kv, "ENABLED_ORANGE", enableorange)){
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fprintf(stderr, "Cannot read ENABLED_ORANGE\n");
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exit(1);
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}
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freekeyvalues(kv);
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// read interface settings
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// details for the red int
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memset(redif, 0, STRING_SIZE);
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if ((ifacefile = fopen(CONFIG_ROOT "/red/iface", "r")))
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{
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if (fgets(redif, STRING_SIZE, ifacefile))
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{
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if (redif[strlen(redif) - 1] == '\n')
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redif[strlen(redif) - 1] = '\0';
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}
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fclose (ifacefile);
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ifacefile = NULL;
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if (!VALID_DEVICE(redif))
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{
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memset(redif, 0, STRING_SIZE);
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}
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}
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kv=initkeyvalues();
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if (!readkeyvalues(kv, CONFIG_ROOT "/ethernet/settings"))
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{
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fprintf(stderr, "Cannot read ethernet settings\n");
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exit(1);
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}
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if (strcmp(enableblue, "on")==0){
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if (!findkey(kv, "BLUE_DEV", blueif)){
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fprintf(stderr, "Cannot read BLUE_DEV\n");
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exit(1);
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}
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}
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if (strcmp(enableorange, "on")==0){
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if (!findkey(kv, "ORANGE_DEV", orangeif)){
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fprintf(stderr, "Cannot read ORNAGE_DEV\n");
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exit(1);
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}
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}
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freekeyvalues(kv);
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}
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void executeCommand(char *command) {
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#ifdef ovpndebug
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printf(strncat(command, "\n", 2));
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#endif
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safe_system(strncat(command, " >/dev/null 2>&1", 17));
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}
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void setChainRules(char *chain, char *interface, char *protocol, char *port)
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{
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char str[STRING_SIZE];
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sprintf(str, "/sbin/iptables -A %sINPUT -i %s -p %s --dport %s -j ACCEPT", chain, interface, protocol, port);
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executeCommand(str);
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sprintf(str, "/sbin/iptables -A %sINPUT -i tun+ -j ACCEPT", chain);
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executeCommand(str);
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sprintf(str, "/sbin/iptables -A %sFORWARD -i tun+ -j ACCEPT", chain);
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executeCommand(str);
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}
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void flushChain(char *chain) {
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char str[STRING_SIZE];
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sprintf(str, "/sbin/iptables -F %sINPUT", chain);
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executeCommand(str);
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sprintf(str, "/sbin/iptables -F %sFORWARD", chain);
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executeCommand(str);
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safe_system(str);
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}
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void deleteChainReference(char *chain) {
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char str[STRING_SIZE];
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sprintf(str, "/sbin/iptables -D INPUT -j %sINPUT", chain);
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executeCommand(str);
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safe_system(str);
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sprintf(str, "/sbin/iptables -D FORWARD -j %sFORWARD", chain);
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executeCommand(str);
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safe_system(str);
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}
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void deleteChain(char *chain) {
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char str[STRING_SIZE];
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sprintf(str, "/sbin/iptables -X %sINPUT", chain);
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executeCommand(str);
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sprintf(str, "/sbin/iptables -X %sFORWARD", chain);
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executeCommand(str);
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}
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void deleteAllChains(void) {
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// not an elegant solution, but to avoid timing problems with undeleted chain references
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deleteChainReference(OVPNRED);
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deleteChainReference(OVPNBLUE);
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deleteChainReference(OVPNORANGE);
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flushChain(OVPNRED);
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flushChain(OVPNBLUE);
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flushChain(OVPNORANGE);
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deleteChain(OVPNRED);
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deleteChain(OVPNBLUE);
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deleteChain(OVPNORANGE);
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}
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void createChainReference(char *chain) {
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char str[STRING_SIZE];
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sprintf(str, "/sbin/iptables -I INPUT %s -j %sINPUT", "14", chain);
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executeCommand(str);
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sprintf(str, "/sbin/iptables -I FORWARD %s -j %sFORWARD", "12", chain);
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executeCommand(str);
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}
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void createChain(char *chain) {
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char str[STRING_SIZE];
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sprintf(str, "/sbin/iptables -N %sINPUT", chain);
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executeCommand(str);
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sprintf(str, "/sbin/iptables -N %sFORWARD", chain);
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executeCommand(str);
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}
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void createAllChains(void) {
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if (!((strcmp(enablered, "on")==0) || (strcmp(enableblue, "on")==0) || (strcmp(enableorange, "on")==0))){
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fprintf(stderr, "OpenVPN is not enabled on any interface\n");
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exit(1);
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} else {
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// create chain and chain references
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if (!strcmp(enableorange, "on")) {
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if (strlen(orangeif)) {
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createChain(OVPNORANGE);
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createChainReference(OVPNORANGE);
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} else {
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fprintf(stderr, "OpenVPN enabled on orange but no orange interface found\n");
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//exit(1);
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}
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}
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if (!strcmp(enableblue, "on")) {
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if (strlen(blueif)) {
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createChain(OVPNBLUE);
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createChainReference(OVPNBLUE);
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} else {
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fprintf(stderr, "OpenVPN enabled on blue but no blue interface found\n");
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//exit(1);
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}
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}
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if (!strcmp(enablered, "on")) {
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if (strlen(redif)) {
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createChain(OVPNRED);
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createChainReference(OVPNRED);
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} else {
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fprintf(stderr, "OpenVPN enabled on red but no red interface found\n");
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//exit(1);
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}
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}
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}
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}
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void setFirewallRules(void) {
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char protocol[STRING_SIZE] = "";
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char dport[STRING_SIZE] = "";
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char dovpnip[STRING_SIZE] = "";
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/* check if it makes sence to proceed further */
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if (!((strcmp(enablered, "on")==0) || (strcmp(enableblue, "on")==0) || (strcmp(enableorange, "on")==0))){
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fprintf(stderr, "Config error, at least one device must be enabled\n");
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exit(1);
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}
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kv = initkeyvalues();
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if (!readkeyvalues(kv, CONFIG_ROOT "/ovpn/settings"))
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{
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fprintf(stderr, "Cannot read ovpn settings\n");
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exit(1);
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}
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/* we got one device, so lets proceed further */
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if (!findkey(kv, "DDEST_PORT", dport)){
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fprintf(stderr, "Cannot read DDEST_PORT\n");
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exit(1);
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}
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if (!findkey(kv, "DPROTOCOL", protocol)){
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fprintf(stderr, "Cannot read DPROTOCOL\n");
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exit(1);
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}
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if (!findkey(kv, "VPN_IP", dovpnip)){
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fprintf(stderr, "Cannot read VPN_IP\n");
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// exit(1); step further as we don't need an ip
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}
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freekeyvalues(kv);
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// set firewall rules
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if (!strcmp(enablered, "on") && strlen(redif))
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setChainRules(OVPNRED, redif, protocol, dport);
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if (!strcmp(enableblue, "on") && strlen(blueif))
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setChainRules(OVPNBLUE, blueif, protocol, dport);
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if (!strcmp(enableorange, "on") && strlen(orangeif))
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setChainRules(OVPNORANGE, orangeif, protocol, dport);
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}
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void stopDaemon(void) {
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char command[STRING_SIZE];
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snprintf(command, STRING_SIZE - 1, "/bin/killall openvpn");
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executeCommand(command);
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snprintf(command, STRING_SIZE - 1, "/bin/rm -f /var/run/openvpn.pid");
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executeCommand(command);
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snprintf(command, STRING_SIZE-1, "/sbin/modprobe -r tun");
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executeCommand(command);
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}
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void startDaemon(void) {
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char command[STRING_SIZE];
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if (!((strcmp(enablered, "on")==0) || (strcmp(enableblue, "on")==0) || (strcmp(enableorange, "on")==0))){
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fprintf(stderr, "OpenVPN is not enabled on any interface\n");
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exit(1);
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} else {
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snprintf(command, STRING_SIZE-1, "/sbin/modprobe tun");
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executeCommand(command);
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snprintf(command, STRING_SIZE-1, "/usr/sbin/openvpn --config /var/ipfire/ovpn/server.conf");
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executeCommand(command);
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}
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}
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void displayopenvpn(void) {
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char command[STRING_SIZE];
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snprintf(command, STRING_SIZE - 1, "/bin/killall -sSIGUSR2 openvpn");
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executeCommand(command);
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}
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int main(int argc, char *argv[]) {
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if (!(initsetuid()))
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exit(1);
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if(argc < 2)
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usage();
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if(argc == 2) {
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if( (strcmp(argv[1], "-k") == 0) || (strcmp(argv[1], "--kill") == 0) ) {
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stopDaemon();
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return 0;
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}
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else if( (strcmp(argv[1], "-d") == 0) || (strcmp(argv[1], "--display") == 0) ) {
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displayopenvpn();
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return 0;
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}
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else if( (strcmp(argv[1], "-dcr") == 0) || (strcmp(argv[1], "--delete-chains-and-rules") == 0) ) {
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deleteAllChains();
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return 0;
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}
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else {
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ovpnInit();
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if( (strcmp(argv[1], "-s") == 0) || (strcmp(argv[1], "--start") == 0) ) {
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deleteAllChains();
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createAllChains();
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setFirewallRules();
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startDaemon();
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return 0;
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}
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else if( (strcmp(argv[1], "-sdo") == 0) || (strcmp(argv[1], "--start-daemon-only") == 0) ) {
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startDaemon();
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return 0;
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}
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else if( (strcmp(argv[1], "-r") == 0) || (strcmp(argv[1], "--restart") == 0) ) {
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stopDaemon();
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deleteAllChains();
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createAllChains();
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setFirewallRules();
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startDaemon();
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return 0;
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}
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else if( (strcmp(argv[1], "-fwr") == 0) || (strcmp(argv[1], "--firewall-rules") == 0) ) {
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deleteAllChains();
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createAllChains();
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setFirewallRules();
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return 0;
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}
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else if( (strcmp(argv[1], "-ccr") == 0) || (strcmp(argv[1], "--create-chains-and-rules") == 0) ) {
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createAllChains();
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setFirewallRules();
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return 0;
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}
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else {
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usage();
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return 0;
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}
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}
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}
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else {
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usage();
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return 0;
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}
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return 0;
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}
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