#include <netinet/in.h>
#include <fcntl.h>
#include "setuid.h"
+#include "netutil.h"
#include "libsmooth.h"
#define noovpndebug
char enableorange[STRING_SIZE] = "off";
// consts
-char OVPNRED[STRING_SIZE] = "OVPN";
-char OVPNBLUE[STRING_SIZE] = "OVPN_BLUE_";
-char OVPNORANGE[STRING_SIZE] = "OVPN_ORANGE_";
+char OVPNINPUT[STRING_SIZE] = "OVPNINPUT";
+char OVPNBLOCK[STRING_SIZE] = "OVPNBLOCK";
char OVPNNAT[STRING_SIZE] = "OVPNNAT";
-char WRAPPERVERSION[STRING_SIZE] = "ipfire-2.2.3";
+char WRAPPERVERSION[STRING_SIZE] = "ipfire-2.2.4";
struct connection_struct {
char name[STRING_SIZE];
char local_subnet[STRING_SIZE];
char transfer_subnet[STRING_SIZE];
char role[STRING_SIZE];
- int port;
+ char port[STRING_SIZE];
struct connection_struct *next;
};
printf(" removes current OpenVPN chains and rules and resets them according to the config\n");
printf(" -sdo --start-daemon-only\n");
printf(" starts OpenVPN daemon only\n");
- printf(" -ccr --create-chains-and-rules\n");
- printf(" creates chains and rules for OpenVPN\n");
- printf(" -dcr --delete-chains-and-rules\n");
- printf(" removes all chains for OpenVPN\n");
exit(1);
}
} else if (count == 29) {
strcpy(conn_curr->proto, result);
} else if (count == 30) {
- conn_curr->port = atoi(result);
+ strcpy(conn_curr->port, result);
}
count++;
int readPidFile(const char *pidfile) {
FILE *fp = fopen(pidfile, "r");
if (fp == NULL) {
- fprintf(stderr, "PID file not found: '%s'\n", pidfile);
exit(1);
}
return pid;
}
+int readExternalAddress(char* address) {
+ FILE *fp = fopen("/var/ipfire/red/local-ipaddress", "r");
+ if (!fp)
+ goto ERROR;
+
+ int r = fscanf(fp, "%s", address);
+ fclose(fp);
+
+ if (r < 0)
+ goto ERROR;
+
+ /* In case the read IP address is not valid, we empty
+ * the content of address and return non-zero. */
+ if (!VALID_IP(address))
+ goto ERROR;
+
+ return 0;
+
+ERROR:
+ address = NULL;
+ return 1;
+}
+
void ovpnInit(void) {
-
// Read OpenVPN configuration
kv = initkeyvalues();
if (!readkeyvalues(kv, CONFIG_ROOT "/ovpn/settings")) {
}
if (!findkey(kv, "ENABLED", enablered)) {
- fprintf(stderr, "Cannot read ENABLED\n");
exit(1);
}
if (!findkey(kv, "ENABLED_BLUE", enableblue)){
- fprintf(stderr, "Cannot read ENABLED_BLUE\n");
exit(1);
}
if (!findkey(kv, "ENABLED_ORANGE", enableorange)){
- fprintf(stderr, "Cannot read ENABLED_ORANGE\n");
exit(1);
}
freekeyvalues(kv);
}
kv=initkeyvalues();
- if (!readkeyvalues(kv, CONFIG_ROOT "/ethernet/settings"))
- {
+ if (!readkeyvalues(kv, CONFIG_ROOT "/ethernet/settings")) {
fprintf(stderr, "Cannot read ethernet settings\n");
exit(1);
}
- if (strcmp(enableblue, "on")==0){
- if (!findkey(kv, "BLUE_DEV", blueif)){
- fprintf(stderr, "Cannot read BLUE_DEV\n");
+ if (strcmp(enableblue, "on") == 0) {
+ if (!findkey(kv, "BLUE_DEV", blueif)) {
exit(1);
}
}
- if (strcmp(enableorange, "on")==0){
- if (!findkey(kv, "ORANGE_DEV", orangeif)){
- fprintf(stderr, "Cannot read ORNAGE_DEV\n");
+
+ if (strcmp(enableorange, "on") == 0) {
+ if (!findkey(kv, "ORANGE_DEV", orangeif)) {
exit(1);
}
- }
+ }
freekeyvalues(kv);
}
safe_system(strncat(command, " >/dev/null 2>&1", 17));
}
-void setChainRules(char *chain, char *interface, char *protocol, char *port)
-{
- char str[STRING_SIZE];
+void addRule(const char *chain, const char *interface, const char *protocol, const char *port) {
+ char command[STRING_SIZE];
- sprintf(str, "/sbin/iptables -A %sINPUT -i %s -p %s --dport %s -j ACCEPT", chain, interface, protocol, port);
- executeCommand(str);
- sprintf(str, "/sbin/iptables -A %sINPUT -i tun+ -j ACCEPT", chain);
- executeCommand(str);
- sprintf(str, "/sbin/iptables -A %sFORWARD -i tun+ -j ACCEPT", chain);
- executeCommand(str);
+ snprintf(command, STRING_SIZE - 1, "/sbin/iptables -A %s -i %s -p %s --dport %s -j ACCEPT",
+ chain, interface, protocol, port);
+ executeCommand(command);
}
void flushChain(char *chain) {
char str[STRING_SIZE];
- sprintf(str, "/sbin/iptables -F %sINPUT", chain);
+ snprintf(str, STRING_SIZE - 1, "/sbin/iptables -F %s", chain);
executeCommand(str);
- sprintf(str, "/sbin/iptables -F %sFORWARD", chain);
- executeCommand(str);
- safe_system(str);
}
void flushChainNAT(char *chain) {
char str[STRING_SIZE];
- sprintf(str, "/sbin/iptables -t nat -F %s", chain);
- executeCommand(str);
-}
-
-void deleteChainReference(char *chain) {
- char str[STRING_SIZE];
-
- sprintf(str, "/sbin/iptables -D INPUT -j %sINPUT", chain);
- executeCommand(str);
- safe_system(str);
- sprintf(str, "/sbin/iptables -D FORWARD -j %sFORWARD", chain);
- executeCommand(str);
- safe_system(str);
-}
-
-void deleteChain(char *chain) {
- char str[STRING_SIZE];
-
- sprintf(str, "/sbin/iptables -X %sINPUT", chain);
- executeCommand(str);
- sprintf(str, "/sbin/iptables -X %sFORWARD", chain);
+ snprintf(str, STRING_SIZE - 1, "/sbin/iptables -t nat -F %s", chain);
executeCommand(str);
}
-void deleteAllChains(void) {
- // not an elegant solution, but to avoid timing problems with undeleted chain references
- deleteChainReference(OVPNRED);
- deleteChainReference(OVPNBLUE);
- deleteChainReference(OVPNORANGE);
- flushChain(OVPNRED);
- flushChain(OVPNBLUE);
- flushChain(OVPNORANGE);
- deleteChain(OVPNRED);
- deleteChain(OVPNBLUE);
- deleteChain(OVPNORANGE);
-}
-
-void createChainReference(char *chain) {
- char str[STRING_SIZE];
- sprintf(str, "/sbin/iptables -I INPUT %s -j %sINPUT", "14", chain);
- executeCommand(str);
- sprintf(str, "/sbin/iptables -I FORWARD %s -j %sFORWARD", "12", chain);
- executeCommand(str);
-}
-
-void createChain(char *chain) {
- char str[STRING_SIZE];
- sprintf(str, "/sbin/iptables -N %sINPUT", chain);
- executeCommand(str);
- sprintf(str, "/sbin/iptables -N %sFORWARD", chain);
- executeCommand(str);
-}
-
-void createAllChains(void) {
- // create chain and chain references
- if (!strcmp(enableorange, "on")) {
- if (strlen(orangeif)) {
- createChain(OVPNORANGE);
- createChainReference(OVPNORANGE);
- } else {
- fprintf(stderr, "OpenVPN enabled on orange but no orange interface found\n");
- //exit(1);
- }
- }
-
- if (!strcmp(enableblue, "on")) {
- if (strlen(blueif)) {
- createChain(OVPNBLUE);
- createChainReference(OVPNBLUE);
- } else {
- fprintf(stderr, "OpenVPN enabled on blue but no blue interface found\n");
- //exit(1);
- }
- }
-
- if (!strcmp(enablered, "on")) {
- if (strlen(redif)) {
- createChain(OVPNRED);
- createChainReference(OVPNRED);
- } else {
- fprintf(stderr, "OpenVPN enabled on red but no red interface found\n");
- //exit(1);
- }
- }
-}
-
char* calcTransferNetAddress(const connection* conn) {
char *subnetmask = strdup(conn->transfer_subnet);
char *address = strsep(&subnetmask, "/");
+ if ((address == NULL) || (subnetmask == NULL)) {
+ goto ERROR;
+ }
+
in_addr_t _address = inet_addr(address);
in_addr_t _subnetmask = inet_addr(subnetmask);
_address &= _subnetmask;
if (!findkey(kv, "VPN_IP", dovpnip)){
fprintf(stderr, "Cannot read VPN_IP\n");
-// exit(1); step further as we don't need an ip
}
freekeyvalues(kv);
// Flush all chains.
- flushChain(OVPNRED);
- flushChain(OVPNBLUE);
- flushChain(OVPNORANGE);
+ flushChain(OVPNINPUT);
+ flushChain(OVPNBLOCK);
flushChainNAT(OVPNNAT);
// set firewall rules
if (!strcmp(enablered, "on") && strlen(redif))
- setChainRules(OVPNRED, redif, protocol, dport);
+ addRule(OVPNINPUT, redif, protocol, dport);
if (!strcmp(enableblue, "on") && strlen(blueif))
- setChainRules(OVPNBLUE, blueif, protocol, dport);
+ addRule(OVPNINPUT, blueif, protocol, dport);
if (!strcmp(enableorange, "on") && strlen(orangeif))
- setChainRules(OVPNORANGE, orangeif, protocol, dport);
+ addRule(OVPNINPUT, orangeif, protocol, dport);
// read connection configuration
connection *conn = getConnections();
char *transfer_subnet_address = NULL;
while (conn != NULL) {
if (strcmp(conn->type, "net") == 0) {
- sprintf(command, "/sbin/iptables -A %sINPUT -i %s -p %s --dport %d -j ACCEPT",
- OVPNRED, redif, conn->proto, conn->port);
+ addRule(OVPNINPUT, redif, conn->proto, conn->port);
+
+ /* Block all communication from the transfer nets. */
+ snprintf(command, STRING_SIZE - 1, "/sbin/iptables -A %s -s %s -j DROP",
+ OVPNBLOCK, conn->transfer_subnet);
executeCommand(command);
local_subnet_address = getLocalSubnetAddress(conn);
transfer_subnet_address = calcTransferNetAddress(conn);
- if ((!local_subnet_address) || (!transfer_subnet_address))
- continue;
-
- snprintf(command, STRING_SIZE, "/sbin/iptables -t nat -A %s -s %s -j SNAT --to-source %s",
- OVPNNAT, transfer_subnet_address, local_subnet_address);
- executeCommand(command);
+ if ((local_subnet_address) && (transfer_subnet_address)) {
+ snprintf(command, STRING_SIZE - 1, "/sbin/iptables -t nat -A %s -s %s -j SNAT --to-source %s",
+ OVPNNAT, transfer_subnet_address, local_subnet_address);
+ executeCommand(command);
+ }
}
conn = conn->next;
void startDaemon(void) {
char command[STRING_SIZE];
- if (!((strcmp(enablered, "on")==0) || (strcmp(enableblue, "on")==0) || (strcmp(enableorange, "on")==0))){
+ if (!((strcmp(enablered, "on") == 0) || (strcmp(enableblue, "on") == 0) || (strcmp(enableorange, "on") == 0))) {
fprintf(stderr, "OpenVPN is not enabled on any interface\n");
exit(1);
} else {
// Make sure all firewall rules are up to date.
setFirewallRules();
+ // Get the external IP address.
+ char address[STRING_SIZE] = "";
+ int r = readExternalAddress(address);
+ if (r) {
+ fprintf(stderr, "Could not read the external address\n");
+ exit(1);
+ }
+
char command[STRING_SIZE];
snprintf(command, STRING_SIZE-1, "/sbin/modprobe tun");
executeCommand(command);
- snprintf(command, STRING_SIZE-1, "/usr/sbin/openvpn --config %s", configfile);
+ snprintf(command, STRING_SIZE-1, "/usr/sbin/openvpn --local %s --config %s", address, configfile);
executeCommand(command);
return 0;
displayopenvpn();
return 0;
}
- else if( (strcmp(argv[1], "-dcr") == 0) || (strcmp(argv[1], "--delete-chains-and-rules") == 0) ) {
- deleteAllChains();
- return 0;
- }
else {
ovpnInit();
if( (strcmp(argv[1], "-s") == 0) || (strcmp(argv[1], "--start") == 0) ) {
- deleteAllChains();
- createAllChains();
setFirewallRules();
startDaemon();
return 0;
}
else if( (strcmp(argv[1], "-r") == 0) || (strcmp(argv[1], "--restart") == 0) ) {
stopDaemon();
- deleteAllChains();
- createAllChains();
setFirewallRules();
startDaemon();
return 0;
}
else if( (strcmp(argv[1], "-fwr") == 0) || (strcmp(argv[1], "--firewall-rules") == 0) ) {
- deleteAllChains();
- createAllChains();
- setFirewallRules();
- return 0;
- }
- else if( (strcmp(argv[1], "-ccr") == 0) || (strcmp(argv[1], "--create-chains-and-rules") == 0) ) {
- createAllChains();
setFirewallRules();
return 0;
}
projects / people / teissler / ipfire-2.x.git / blobdiff