int
ovpn_server_expcli_main(int argc, char **argv)
{
FILE *fp;
int i, i_atls, rsa_bits, days_valid;
char *wan_addr;
const char *tmp_ovpn_path = "/tmp/export_ovpn";
const char *tmp_ovpn_conf = "/tmp/client.ovpn";
if (argc < 2 || strlen(argv[1]) < 1) {
printf("Usage: %s common_name [rsa_bits] [days_valid]\n", argv[0]);
return 1;
}
rsa_bits = 1024;
if (argc > 2 && atoi(argv[2]) >= 1024)
rsa_bits = atoi(argv[2]);
days_valid = 365;
if (argc > 3 && atoi(argv[3]) > 0)
days_valid = atoi(argv[3]);
i_atls = nvram_get_int("vpns_ov_atls");
for (i=0; i<5; i++) {
if (!i_atls && (i == 4))
continue;
if (!openvpn_check_key(openvpn_server_keys[i], 1)) {
printf("Error: server file %s is not found\n", openvpn_server_keys[i]);
return 1;
}
}
/* Generate client cert and key */
doSystem("rm -rf %s", tmp_ovpn_path);
setenv("CRT_PATH_CLI", tmp_ovpn_path, 1);
doSystem("/usr/bin/openvpn-cert.sh %s -n '%s' -b %d -d %d", "client", argv[1], rsa_bits, days_valid);
unsetenv("CRT_PATH_CLI");
fp = fopen(tmp_ovpn_conf, "w+");
if (!fp) {
doSystem("rm -rf %s", tmp_ovpn_path);
printf("Error: unable to create file %s\n", tmp_ovpn_conf);
return 1;
}
wan_addr = get_ddns_fqdn();
if (!wan_addr) {
wan_addr = get_wan_unit_value(0, "ipaddr");
if (!is_valid_ipv4(wan_addr))
wan_addr = NULL;
}
if (!wan_addr)
wan_addr = "{wan_address}";
fprintf(fp, "client\n");
fprintf(fp, "dev %s\n", (nvram_get_int("vpns_ov_mode") == 1) ? "tun" : "tap");
fprintf(fp, "proto %s\n", (nvram_get_int("vpns_ov_prot") > 0) ? "tcp-client" : "udp");
fprintf(fp, "remote %s %d\n", wan_addr, nvram_safe_get_int("vpns_ov_port", 1194, 1, 65535));
fprintf(fp, "resolv-retry %s\n", "infinite");
fprintf(fp, "nobind\n");
fprintf(fp, "persist-key\n");
fprintf(fp, "persist-tun\n");
openvpn_add_auth(fp, nvram_get_int("vpns_ov_mdig"));
openvpn_add_cipher(fp, nvram_get_int("vpns_ov_ciph"));
openvpn_add_lzo(fp, nvram_get_int("vpns_ov_clzo"), 0);
fprintf(fp, "nice %d\n", 0);
fprintf(fp, "verb %d\n", 3);
fprintf(fp, "mute %d\n", 10);
fprintf(fp, ";ns-cert-type %s\n", "server");
openvpn_add_key(fp, SERVER_CERT_DIR, openvpn_server_keys[0], "ca");
openvpn_add_key(fp, tmp_ovpn_path, openvpn_client_keys[1], "cert");
openvpn_add_key(fp, tmp_ovpn_path, openvpn_client_keys[2], "key");
if (i_atls) {
openvpn_add_key(fp, SERVER_CERT_DIR, openvpn_server_keys[4], "tls-auth");
fprintf(fp, "key-direction %d\n", 1);
}
fclose(fp);
doSystem("rm -rf %s", tmp_ovpn_path);
doSystem("unix2dos %s", tmp_ovpn_conf);
chmod(tmp_ovpn_conf, 0600);
return 0;
}
static int
openvpn_create_client_conf(const char *conf_file, int is_tun)
{
FILE *fp;
int i, i_prot, i_auth, i_atls;
i_auth = nvram_get_int("vpnc_ov_auth");
i_atls = nvram_get_int("vpnc_ov_atls");
for (i=0; i<4; i++) {
if (i_auth == 1 && (i == 1 || i == 2))
continue;
if (!i_atls && (i == 3))
continue;
if (!openvpn_check_key(openvpn_client_keys[i], 0))
return 1;
}
i_prot = nvram_get_int("vpnc_ov_prot");
fp = fopen(conf_file, "w+");
if (fp) {
fprintf(fp, "client\n");
if (i_prot > 0)
fprintf(fp, "proto %s\n", "tcp-client");
else
fprintf(fp, "proto %s\n", "udp");
fprintf(fp, "remote %s %d\n", nvram_safe_get("vpnc_peer"), nvram_safe_get_int("vpnc_ov_port", 1194, 1, 65535));
fprintf(fp, "resolv-retry %s\n", "infinite");
fprintf(fp, "nobind\n");
fprintf(fp, "dev %s\n", (is_tun) ? IFNAME_CLIENT_TUN : IFNAME_CLIENT_TAP);
fprintf(fp, "ca %s/%s\n", CLIENT_CERT_DIR, openvpn_client_keys[0]);
if (i_auth == 0) {
fprintf(fp, "cert %s/%s\n", CLIENT_CERT_DIR, openvpn_client_keys[1]);
fprintf(fp, "key %s/%s\n", CLIENT_CERT_DIR, openvpn_client_keys[2]);
}
if (i_atls)
fprintf(fp, "tls-auth %s/%s %d\n", CLIENT_CERT_DIR, openvpn_client_keys[3], 1);
openvpn_add_auth(fp, nvram_get_int("vpnc_ov_mdig"));
openvpn_add_cipher(fp, nvram_get_int("vpnc_ov_ciph"));
openvpn_add_lzo(fp, nvram_get_int("vpnc_ov_clzo"), 0);
if (i_auth == 1) {
fprintf(fp, "auth-user-pass %s\n", "secret");
openvpn_create_client_secret("secret");
}
if (nvram_match("vpnc_dgw", "1"))
fprintf(fp, "redirect-gateway def1 bypass-dhcp\n");
fprintf(fp, "persist-key\n");
fprintf(fp, "script-security %d\n", 2);
fprintf(fp, "writepid %s\n", CLIENT_PID_FILE);
fprintf(fp, "up %s\n", SCRIPT_OVPN_CLIENT);
fprintf(fp, "down %s\n", SCRIPT_OVPN_CLIENT);
fprintf(fp, "\n### User params:\n");
load_user_config(fp, CLIENT_CERT_DIR, "client.conf", forbidden_list);
fclose(fp);
chmod(conf_file, 0644);
return 0;
}
return 1;
}
static int
openvpn_create_client_conf(const char *conf_file, int is_tun)
{
FILE *fp;
int i, i_prot, i_prot_ori, i_auth, i_atls;
const char *p_peer, *p_prot;
i_auth = nvram_get_int("vpnc_ov_auth");
i_atls = nvram_get_int("vpnc_ov_atls");
for (i=0; i<4; i++) {
if (i_auth == 1 && (i == 1 || i == 2))
continue;
if (!i_atls && (i == 3))
continue;
if (!openvpn_check_key(openvpn_client_keys[i], 0))
return 1;
}
i_prot = nvram_get_int("vpnc_ov_prot");
i_prot_ori = i_prot;
if (i_prot > 1 && get_ipv6_type() == IPV6_DISABLED)
i_prot &= 1;
p_peer = nvram_safe_get("vpnc_peer");
/* note: upcoming openvpn 2.4 will need direct set udp4/tcp4-client for ipv4 only */
#if defined (USE_IPV6)
/* check peer address is direct ipv4/ipv6 */
if (i_prot > 1 && is_valid_ipv4(p_peer))
i_prot &= 1;
else if (i_prot < 2 && is_valid_ipv6(p_peer))
i_prot += 2;
if (i_prot == 3)
p_prot = "tcp6-client";
else if (i_prot == 2)
p_prot = "udp6";
else
#endif
if (i_prot == 1)
p_prot = "tcp-client";
else
p_prot = "udp";
/* fixup ipv4/ipv6 mismatch */
if (i_prot != i_prot_ori)
nvram_set_int("vpnc_ov_prot", i_prot);
fp = fopen(conf_file, "w+");
if (!fp)
return 1;
fprintf(fp, "client\n");
fprintf(fp, "proto %s\n", p_prot);
fprintf(fp, "remote %s %d\n", p_peer, nvram_safe_get_int("vpnc_ov_port", 1194, 1, 65535));
fprintf(fp, "resolv-retry %s\n", "infinite");
fprintf(fp, "nobind\n");
fprintf(fp, "dev %s\n", (is_tun) ? IFNAME_CLIENT_TUN : IFNAME_CLIENT_TAP);
fprintf(fp, "ca %s/%s\n", CLIENT_CERT_DIR, openvpn_client_keys[0]);
if (i_auth == 0) {
fprintf(fp, "cert %s/%s\n", CLIENT_CERT_DIR, openvpn_client_keys[1]);
fprintf(fp, "key %s/%s\n", CLIENT_CERT_DIR, openvpn_client_keys[2]);
}
if (i_atls)
fprintf(fp, "tls-auth %s/%s %d\n", CLIENT_CERT_DIR, openvpn_client_keys[3], 1);
openvpn_add_auth(fp, nvram_get_int("vpnc_ov_mdig"));
openvpn_add_cipher(fp, nvram_get_int("vpnc_ov_ciph"));
openvpn_add_lzo(fp, nvram_get_int("vpnc_ov_clzo"), 0);
if (i_auth == 1) {
fprintf(fp, "auth-user-pass %s\n", "secret");
openvpn_create_client_secret("secret");
}
if (nvram_match("vpnc_dgw", "1"))
fprintf(fp, "redirect-gateway def1 bypass-dhcp\n");
fprintf(fp, "persist-key\n");
fprintf(fp, "script-security %d\n", 2);
fprintf(fp, "writepid %s\n", CLIENT_PID_FILE);
fprintf(fp, "up %s\n", SCRIPT_OVPN_CLIENT);
fprintf(fp, "down %s\n", SCRIPT_OVPN_CLIENT);
fprintf(fp, "\n### User params:\n");
load_user_config(fp, CLIENT_CERT_DIR, "client.conf", forbidden_list);
fclose(fp);
chmod(conf_file, 0644);
return 0;
}
static int
openvpn_create_server_conf(const char *conf_file, int is_tun)
{
FILE *fp;
int i, i_prot, i_atls, i_rdgw, i_dhcp, i_items, i_cli0, i_cli1;
unsigned int laddr, lmask, lsnet;
struct in_addr pool_in;
char pooll[32], pool1[32], pool2[32];
char *lanip, *lannm, *wins, *dns1, *dns2;
i_atls = nvram_get_int("vpns_ov_atls");
for (i=0; i<5; i++) {
if (!i_atls && (i == 4))
continue;
if (!openvpn_check_key(openvpn_server_keys[i], 1))
return 1;
}
i_prot = nvram_get_int("vpns_ov_prot");
i_rdgw = nvram_get_int("vpns_ov_rdgw");
i_cli0 = nvram_safe_get_int("vpns_cli0", 245, 1, 254);
i_cli1 = nvram_safe_get_int("vpns_cli1", 254, 2, 254);
i_dhcp = is_dhcpd_enabled(0);
lanip = nvram_safe_get("lan_ipaddr");
lannm = nvram_safe_get("lan_netmask");
laddr = ntohl(inet_addr(lanip));
lmask = ntohl(inet_addr(lannm));
lsnet = (~lmask) - 1;
if (i_cli0 > (int)lsnet) i_cli0 = (int)lsnet;
if (i_cli1 > (int)lsnet) i_cli1 = (int)lsnet;
if (i_cli1 < i_cli0) i_cli1 = i_cli0;
pool_in.s_addr = htonl(laddr & lmask);
strcpy(pooll, inet_ntoa(pool_in));
pool_in.s_addr = htonl((laddr & lmask) | (unsigned int)i_cli0);
strcpy(pool1, inet_ntoa(pool_in));
pool_in.s_addr = htonl((laddr & lmask) | (unsigned int)i_cli1);
strcpy(pool2, inet_ntoa(pool_in));
fp = fopen(conf_file, "w+");
if (fp) {
if (i_prot > 0)
fprintf(fp, "proto %s\n", "tcp-server");
else
fprintf(fp, "proto %s\n", "udp");
fprintf(fp, "port %d\n", nvram_safe_get_int("vpns_ov_port", 1194, 1, 65535));
if (is_tun) {
char *vnet, *vmsk;
vnet = nvram_safe_get("vpns_vnet");
vmsk = VPN_SERVER_SUBNET_MASK;
laddr = ntohl(inet_addr(vnet));
lmask = ntohl(inet_addr(vmsk));
pool_in.s_addr = htonl(laddr & lmask);
fprintf(fp, "dev %s\n", IFNAME_SERVER_TUN);
fprintf(fp, "topology %s\n", "subnet");
fprintf(fp, "server %s %s\n", inet_ntoa(pool_in), vmsk);
fprintf(fp, "client-config-dir %s\n", "ccd");
openvpn_create_server_acl(fp, "ccd");
fprintf(fp, "push \"route %s %s\"\n", pooll, lannm);
} else {
fprintf(fp, "dev %s\n", IFNAME_SERVER_TAP);
fprintf(fp, "server-bridge %s %s %s %s\n", lanip, lannm, pool1, pool2);
}
openvpn_add_auth(fp, nvram_get_int("vpns_ov_mdig"));
openvpn_add_cipher(fp, nvram_get_int("vpns_ov_ciph"));
openvpn_add_lzo(fp, nvram_get_int("vpns_ov_clzo"), 1);
i_items = 0;
if (i_rdgw) {
fprintf(fp, "push \"redirect-gateway def1 %s\"\n", "bypass-dhcp");
if (i_dhcp) {
dns1 = nvram_safe_get("dhcp_dns1_x");
dns2 = nvram_safe_get("dhcp_dns2_x");
if (is_valid_ipv4(dns1) && (strcmp(dns1, lanip))) {
i_items++;
fprintf(fp, "push \"dhcp-option %s %s\"\n", "DNS", dns1);
}
if (is_valid_ipv4(dns2) && (strcmp(dns2, lanip)) && (strcmp(dns2, dns1))) {
i_items++;
fprintf(fp, "push \"dhcp-option %s %s\"\n", "DNS", dns2);
}
}
if (i_items < 2)
fprintf(fp, "push \"dhcp-option %s %s\"\n", "DNS", lanip);
}
i_items = 0;
if (i_dhcp) {
wins = nvram_safe_get("dhcp_wins_x");
if (is_valid_ipv4(wins)) {
i_items++;
fprintf(fp, "push \"dhcp-option %s %s\"\n", "WINS", wins);
}
}
#if defined(APP_SMBD) || defined(APP_NMBD)
if ((i_items < 1) && nvram_get_int("wins_enable"))
fprintf(fp, "push \"dhcp-option %s %s\"\n", "WINS", lanip);
#endif
fprintf(fp, "ca %s/%s\n", SERVER_CERT_DIR, openvpn_server_keys[0]);
fprintf(fp, "dh %s/%s\n", SERVER_CERT_DIR, openvpn_server_keys[1]);
fprintf(fp, "cert %s/%s\n", SERVER_CERT_DIR, openvpn_server_keys[2]);
fprintf(fp, "key %s/%s\n", SERVER_CERT_DIR, openvpn_server_keys[3]);
if (i_atls)
fprintf(fp, "tls-auth %s/%s %d\n", SERVER_CERT_DIR, openvpn_server_keys[4], 0);
fprintf(fp, "persist-key\n");
fprintf(fp, "persist-tun\n");
fprintf(fp, "user %s\n", SYS_USER_NOBODY);
fprintf(fp, "group %s\n", SYS_GROUP_NOGROUP);
fprintf(fp, "script-security %d\n", 2);
fprintf(fp, "tmp-dir %s\n", COMMON_TEMP_DIR);
fprintf(fp, "writepid %s\n", SERVER_PID_FILE);
fprintf(fp, "client-connect %s\n", SCRIPT_OVPN_SERVER);
fprintf(fp, "client-disconnect %s\n", SCRIPT_OVPN_SERVER);
fprintf(fp, "\n### User params:\n");
load_user_config(fp, SERVER_CERT_DIR, "server.conf", forbidden_list);
fclose(fp);
chmod(conf_file, 0644);
return 0;
}
return 1;
}
static int
openvpn_create_server_conf(const char *conf_file, int is_tun)
{
FILE *fp;
int i, i_prot, i_prot_ori, i_atls, i_rdgw, i_dhcp, i_items;
unsigned int laddr, lmask;
char *lanip, *lannm, *wins, *dns1, *dns2;
const char *p_prot;
struct in_addr pool_in;
i_atls = nvram_get_int("vpns_ov_atls");
for (i=0; i<5; i++) {
if (!i_atls && (i == 4))
continue;
if (!openvpn_check_key(openvpn_server_keys[i], 1))
return 1;
}
i_prot = nvram_get_int("vpns_ov_prot");
i_rdgw = nvram_get_int("vpns_ov_rdgw");
i_dhcp = is_dhcpd_enabled(0);
lanip = nvram_safe_get("lan_ipaddr");
lannm = nvram_safe_get("lan_netmask");
laddr = ntohl(inet_addr(lanip));
lmask = ntohl(inet_addr(lannm));
i_prot_ori = i_prot;
if (i_prot > 1 && get_ipv6_type() == IPV6_DISABLED)
i_prot &= 1;
/* note: upcoming openvpn 2.4 will need direct set udp4/tcp4-server for ipv4 only */
#if defined (USE_IPV6)
if (i_prot == 3)
p_prot = "tcp6-server";
else if (i_prot == 2)
p_prot = "udp6";
else
#endif
if (i_prot == 1)
p_prot = "tcp-server";
else
p_prot = "udp";
/* fixup ipv4/ipv6 mismatch */
if (i_prot != i_prot_ori)
nvram_set_int("vpns_ov_prot", i_prot);
fp = fopen(conf_file, "w+");
if (!fp)
return 1;
fprintf(fp, "proto %s\n", p_prot);
fprintf(fp, "port %d\n", nvram_safe_get_int("vpns_ov_port", 1194, 1, 65535));
if (is_tun) {
unsigned int vnet, vmsk;
vnet = ntohl(inet_addr(nvram_safe_get("vpns_vnet")));
vmsk = ntohl(inet_addr(VPN_SERVER_SUBNET_MASK));
pool_in.s_addr = htonl(vnet & vmsk);
fprintf(fp, "dev %s\n", IFNAME_SERVER_TUN);
fprintf(fp, "topology %s\n", "subnet");
fprintf(fp, "server %s %s\n", inet_ntoa(pool_in), VPN_SERVER_SUBNET_MASK);
fprintf(fp, "client-config-dir %s\n", "ccd");
openvpn_create_server_acl(fp, "ccd", vnet, vmsk);
pool_in.s_addr = htonl(laddr & lmask);
fprintf(fp, "push \"route %s %s\"\n", inet_ntoa(pool_in), lannm);
} else {
char sp_b[INET_ADDRSTRLEN], sp_e[INET_ADDRSTRLEN];
unsigned int vp_b, vp_e, lnet;
lnet = ~(lmask) - 1;
vp_b = (unsigned int)nvram_safe_get_int("vpns_cli0", 245, 1, 254);
vp_e = (unsigned int)nvram_safe_get_int("vpns_cli1", 254, 2, 254);
if (vp_b > lnet)
vp_b = lnet;
if (vp_e > lnet)
vp_e = lnet;
if (vp_e < vp_b)
vp_e = vp_b;
pool_in.s_addr = htonl((laddr & lmask) | vp_b);
strcpy(sp_b, inet_ntoa(pool_in));
pool_in.s_addr = htonl((laddr & lmask) | vp_e);
strcpy(sp_e, inet_ntoa(pool_in));
fprintf(fp, "dev %s\n", IFNAME_SERVER_TAP);
fprintf(fp, "server-bridge %s %s %s %s\n", lanip, lannm, sp_b, sp_e);
}
openvpn_add_auth(fp, nvram_get_int("vpns_ov_mdig"));
openvpn_add_cipher(fp, nvram_get_int("vpns_ov_ciph"));
openvpn_add_lzo(fp, nvram_get_int("vpns_ov_clzo"), 1);
i_items = 0;
if (i_rdgw) {
fprintf(fp, "push \"redirect-gateway def1 %s\"\n", "bypass-dhcp");
if (i_dhcp) {
dns1 = nvram_safe_get("dhcp_dns1_x");
dns2 = nvram_safe_get("dhcp_dns2_x");
if (is_valid_ipv4(dns1)) {
i_items++;
fprintf(fp, "push \"dhcp-option %s %s\"\n", "DNS", dns1);
}
if (is_valid_ipv4(dns2) && strcmp(dns2, dns1)) {
i_items++;
fprintf(fp, "push \"dhcp-option %s %s\"\n", "DNS", dns2);
}
}
if (i_items < 1)
fprintf(fp, "push \"dhcp-option %s %s\"\n", "DNS", lanip);
}
i_items = 0;
if (i_dhcp) {
wins = nvram_safe_get("dhcp_wins_x");
if (is_valid_ipv4(wins)) {
i_items++;
fprintf(fp, "push \"dhcp-option %s %s\"\n", "WINS", wins);
}
}
#if defined(APP_SMBD) || defined(APP_NMBD)
if ((i_items < 1) && nvram_get_int("wins_enable"))
fprintf(fp, "push \"dhcp-option %s %s\"\n", "WINS", lanip);
#endif
fprintf(fp, "ca %s/%s\n", SERVER_CERT_DIR, openvpn_server_keys[0]);
fprintf(fp, "dh %s/%s\n", SERVER_CERT_DIR, openvpn_server_keys[1]);
fprintf(fp, "cert %s/%s\n", SERVER_CERT_DIR, openvpn_server_keys[2]);
fprintf(fp, "key %s/%s\n", SERVER_CERT_DIR, openvpn_server_keys[3]);
if (i_atls)
fprintf(fp, "tls-auth %s/%s %d\n", SERVER_CERT_DIR, openvpn_server_keys[4], 0);
fprintf(fp, "persist-key\n");
fprintf(fp, "persist-tun\n");
fprintf(fp, "user %s\n", SYS_USER_NOBODY);
fprintf(fp, "group %s\n", SYS_GROUP_NOGROUP);
fprintf(fp, "script-security %d\n", 2);
fprintf(fp, "tmp-dir %s\n", COMMON_TEMP_DIR);
fprintf(fp, "writepid %s\n", SERVER_PID_FILE);
fprintf(fp, "client-connect %s\n", SCRIPT_OVPN_SERVER);
fprintf(fp, "client-disconnect %s\n", SCRIPT_OVPN_SERVER);
fprintf(fp, "\n### User params:\n");
load_user_config(fp, SERVER_CERT_DIR, "server.conf", forbidden_list);
fclose(fp);
chmod(conf_file, 0644);
return 0;
}
