static void dns(Dict* dns, struct Context* ctx, struct Except* eh)
{
List* servers = Dict_getList(dns, String_CONST("servers"));
int count = List_size(servers);
for (int i = 0; i < count; i++) {
String* server = List_getString(servers, i);
if (!server) {
Except_throw(eh, "dns.servers[%d] is not a string", i);
}
Dict* d = Dict_new(ctx->alloc);
Dict_putString(d, String_CONST("addr"), server, ctx->alloc);
rpcCall(String_CONST("RainflyClient_addServer"), d, ctx, ctx->alloc);
}
List* keys = Dict_getList(dns, String_CONST("keys"));
count = List_size(keys);
for (int i = 0; i < count; i++) {
String* key = List_getString(keys, i);
if (!key) {
Except_throw(eh, "dns.keys[%d] is not a string", i);
}
Dict* d = Dict_new(ctx->alloc);
Dict_putString(d, String_CONST("ident"), key, ctx->alloc);
rpcCall(String_CONST("RainflyClient_addKey"), d, ctx, ctx->alloc);
}
int64_t* minSigs = Dict_getInt(dns, String_CONST("minSignatures"));
if (minSigs) {
Dict* d = Dict_new(ctx->alloc);
Dict_putInt(d, String_CONST("count"), *minSigs, ctx->alloc);
rpcCall(String_CONST("RainflyClient_minSignatures"), d, ctx, ctx->alloc);
}
}
struct Interface* TUNInterface_new(const char* interfaceName,
char assignedInterfaceName[TUNInterface_IFNAMSIZ],
struct EventBase* base,
struct Log* logger,
struct Except* eh,
struct Allocator* alloc)
{
uint32_t maxNameSize = (IFNAMSIZ < TUNInterface_IFNAMSIZ) ? IFNAMSIZ : TUNInterface_IFNAMSIZ;
Log_info(logger, "Initializing tun device [%s]", ((interfaceName) ? interfaceName : "auto"));
struct ifreq ifRequest = { .ifr_flags = IFF_TUN };
if (interfaceName) {
if (strlen(interfaceName) > maxNameSize) {
Except_throw(eh, "tunnel name too big, limit is [%d] characters", maxNameSize);
}
strncpy(ifRequest.ifr_name, interfaceName, maxNameSize);
}
int fileno = open(DEVICE_PATH, O_RDWR);
if (fileno < 0) {
Except_throw(eh, "open(\"%s\") [%s]", DEVICE_PATH, strerror(errno));
}
if (ioctl(fileno, TUNSETIFF, &ifRequest) < 0) {
int err = errno;
close(fileno);
Except_throw(eh, "ioctl(TUNSETIFF) [%s]", strerror(err));
}
strncpy(assignedInterfaceName, ifRequest.ifr_name, maxNameSize);
struct Pipe* p = Pipe_forFiles(fileno, fileno, base, eh, alloc);
return &p->iface;
}
void NetDev_addAddress(const char* ifName,
struct Sockaddr* sa,
int prefixLen,
struct Log* logger,
struct Except* eh)
{
int addrFam = Sockaddr_getFamily(sa);
struct Allocator* alloc;
BufferAllocator_STACK(alloc, 4096);
char* printedAddr = Sockaddr_print(sa, alloc);
if (addrFam != Sockaddr_AF_INET && addrFam != Sockaddr_AF_INET6) {
Except_throw(eh, "Unknown address type for address [%s]", printedAddr);
}
int prefixMax = (addrFam == Sockaddr_AF_INET6) ? 128 : 32;
if (prefixLen < 0 || prefixLen > prefixMax) {
Except_throw(eh, "prefixLen [%d] must be greater than 0 and less than %d",
prefixLen, prefixMax);
}
void* addr;
int len = Sockaddr_getAddress(sa, &addr);
if (len < 0 || len != prefixMax / 8) {
Except_throw(eh, "Invalid sockaddr [%s]", printedAddr);
}
Log_info(logger, "Setting IP address [%s/%d] on interface [%s]",
printedAddr, prefixLen, ifName);
NetPlatform_addAddress(ifName, addr, prefixLen, addrFam, logger, eh);
}
void NetPlatform_setMTU(const char* interfaceName,
uint32_t mtu,
struct Log* logger,
struct Except* eh)
{
int s = socket(AF_INET6, SOCK_DGRAM, 0);
if (s < 0) {
Except_throw(eh, "socket() [%s]", strerror(errno));
}
struct ifreq ifRequest;
strncpy(ifRequest.ifr_name, interfaceName, IFNAMSIZ);
ifRequest.ifr_mtu = mtu;
Log_info(logger, "Setting MTU for device [%s] to [%u] bytes.", interfaceName, mtu);
if (ioctl(s, SIOCSIFMTU, &ifRequest) < 0) {
int err = errno;
close(s);
Except_throw(eh, "ioctl(SIOCSIFMTU) failed [%s]", strerror(err));
}
}
static void checkInterfaceUp(int socket,
struct ifreq* ifRequest,
struct Log* logger,
struct Except* eh)
{
if (ioctl(socket, SIOCGIFFLAGS, ifRequest) < 0) {
int err = errno;
close(socket);
Except_throw(eh, "ioctl(SIOCGIFFLAGS) [%s]", strerror(err));
}
if (ifRequest->ifr_flags & IFF_UP & IFF_RUNNING) {
// already up.
return;
}
Log_info(logger, "Bringing up interface [%s]", ifRequest->ifr_name);
ifRequest->ifr_flags |= IFF_UP | IFF_RUNNING;
if (ioctl(socket, SIOCSIFFLAGS, ifRequest) < 0) {
int err = errno;
close(socket);
Except_throw(eh, "ioctl(SIOCSIFFLAGS) [%s]", strerror(err));
}
}
static void checkAddressAndPrefix(struct Sockaddr* sa,
int* addrFam,
char** printedAddr,
void** addr,
struct Allocator* alloc,
struct Except* eh)
{
*printedAddr = Sockaddr_print(sa, alloc);
*addrFam = Sockaddr_getFamily(sa);
if (*addrFam != Sockaddr_AF_INET && *addrFam != Sockaddr_AF_INET6) {
Except_throw(eh, "Unknown address type for address [%s]", *printedAddr);
}
int prefixMax = (*addrFam == Sockaddr_AF_INET6) ? 128 : 32;
if (!(sa->flags & Sockaddr_flags_PREFIX)) {
sa->prefix = prefixMax;
}
if (sa->prefix > prefixMax) {
Except_throw(eh, "prefix [%u] must be less than %d", sa->prefix, prefixMax);
}
int len = Sockaddr_getAddress(sa, addr);
if (len < 0 || len != prefixMax / 8) {
Except_throw(eh, "Invalid sockaddr [%s]", *printedAddr);
}
}
static void addIp4Address(const char* interfaceName,
const uint8_t address[4],
int prefixLen,
struct Log* logger,
struct Except* eh)
{
struct ifaliasreq ifaliasreq;
struct sockaddr_in* in;
memset(&ifaliasreq, 0, sizeof(ifaliasreq));
snprintf(ifaliasreq.ifra_name,IFNAMSIZ, "%s",interfaceName);
char myIp[40];
snprintf(myIp, 40, "%u.%u.%u.%u", address[0], address[1], address[2], address[3]);
in_addr_t nmask = ( ~((1 << (32 - prefixLen)) - 1) );
char myMask[40];
snprintf(myMask,40,"%u",nmask);
in = (struct sockaddr_in *) &ifaliasreq.ifra_addr;
in->sin_family = AF_INET;
in->sin_len = sizeof(ifaliasreq.ifra_addr);
int err = inet_aton(myIp, &in->sin_addr);
if (err == 0){
Except_throw(eh, "inet_aton(myIp) failed");
}
in = (struct sockaddr_in *) &ifaliasreq.ifra_mask;
in->sin_family = AF_INET;
in->sin_len = sizeof(ifaliasreq.ifra_mask);
err = inet_aton(myMask, &in->sin_addr);
if (err == 0){
Except_throw(eh, "inet_aton(myMask) failed");
}
in = (struct sockaddr_in *) &ifaliasreq.ifra_broadaddr;
in->sin_family = AF_INET;
in->sin_len = sizeof(ifaliasreq.ifra_broadaddr);
in->sin_addr.s_addr =
((struct sockaddr_in *) &ifaliasreq.ifra_addr)->sin_addr.s_addr | ~
((struct sockaddr_in *) &ifaliasreq.ifra_mask)->sin_addr.s_addr;
int s = socket(PF_INET, SOCK_STREAM, 0);
if (ioctl(s, SIOCAIFADDR, &ifaliasreq) == -1){
int err = errno;
close(s);
Except_throw(eh, "ioctl(SIOCAIFADDR) [%s]",strerror(err));
}
Log_info(logger, "Configured IPv4 [%s/%s] for [%s]", myIp, myMask, interfaceName);
close(s);
}
struct Interface* TUNInterface_new(const char* interfaceName,
char assignedInterfaceName[TUNInterface_IFNAMSIZ],
int isTapMode,
struct EventBase* base,
struct Log* logger,
struct Except* eh,
struct Allocator* alloc)
{
if (isTapMode) { Except_throw(eh, "tap mode not supported on this platform"); }
// to store the tunnel device index
int ppa = 0;
// Open the descriptor
int tunFd = open("/dev/tun0", O_RDWR);
if (tunFd == -1) {
tunFd = open("/dev/tun1", O_RDWR);
ppa = 1;
}
if (tunFd == -1) {
tunFd = open("/dev/tun2", O_RDWR);
ppa = 2;
}
if (tunFd == -1) {
tunFd = open("/dev/tun3", O_RDWR);
ppa = 3;
}
if (tunFd < 0 ) {
int err = errno;
close(tunFd);
char* error = NULL;
if (tunFd < 0) {
error = "open(\"/dev/tunX\")";
}
Except_throw(eh, "%s [%s]", error, strerror(err));
}
// Since devices are numbered rather than named, it's not possible to have tun0 and cjdns0
// so we'll skip the pretty names and call everything tunX
if (assignedInterfaceName) {
snprintf(assignedInterfaceName, TUNInterface_IFNAMSIZ, "tun%d", ppa);
}
char* error = NULL;
if (error) {
int err = errno;
close(tunFd);
Except_throw(eh, "%s [%s]", error, strerror(err));
}
struct Pipe* p = Pipe_forFiles(tunFd, tunFd, base, eh, alloc);
return BSDMessageTypeWrapper_new(&p->iface, logger);
}
void NetPlatform_addAddress(const char* interfaceName,
const uint8_t* address,
int prefixLen,
int addrFam,
struct Log* logger,
struct Allocator* tempAlloc,
struct Except* eh)
{
struct ifreq ifRequest;
int s = socketForIfName(interfaceName, addrFam, eh, &ifRequest);
int ifIndex = ifRequest.ifr_ifindex;
// checkInterfaceUp() clobbers the ifindex.
checkInterfaceUp(s, &ifRequest, logger, eh);
if (addrFam == Sockaddr_AF_INET6) {
struct in6_ifreq ifr6 = {
.ifr6_ifindex = ifIndex,
.ifr6_prefixlen = prefixLen
};
memcpy(&ifr6.ifr6_addr, address, 16);
if (ioctl(s, SIOCSIFADDR, &ifr6) < 0) {
int err = errno;
close(s);
Except_throw(eh, "ioctl(SIOCSIFADDR) [%s]", strerror(err));
}
} else if (addrFam == Sockaddr_AF_INET) {
static void sendMessageInternal(struct Message* message,
struct sockaddr_ll* addr,
struct ETHInterface_pvt* context,
struct Except* exHandler)
{
/* Cut down on the noise
uint8_t buff[sizeof(*addr) * 2 + 1] = {0};
Hex_encode(buff, sizeof(buff), (uint8_t*)addr, sizeof(*addr));
Log_debug(context->logger, "Sending ethernet frame to [%s]", buff);
*/
if (sendto(context->socket,
message->bytes,
message->length,
0,
(struct sockaddr*) addr,
sizeof(struct sockaddr_ll)) < 0)
{
switch (errno) {
default:;
Log_info(context->logger, "[%s] Got error sending to socket [%s]",
context->ifName->bytes, strerror(errno));
Except_throw(exHandler, "Interface %s removed: [%s]",
context->ifName->bytes, strerror(errno));
case EMSGSIZE:
case ENOBUFS:
case EAGAIN:;
// todo: care
}
}
return;
}
void Seccomp_dropPermissions(struct Allocator* tempAlloc, struct Log* logger, struct Except* eh)
{
struct sock_fprog* filter = mkFilter(tempAlloc, eh);
installFilter(filter, logger, eh);
if (!Seccomp_isWorking()) {
Except_throw(eh, "Seccomp filter not installed properly, Seccomp_isWorking() -> false");
}
}
static void addIp4Address(const char* interfaceName,
const uint8_t address[4],
int prefixLen,
struct Log* logger,
struct Except* eh)
{
Except_throw(eh, "unimplemented");
}
void NetPlatform_addRoute(const char* interfaceName,
const uint8_t* address,
int prefixLen,
int addrFam,
struct Log* logger,
struct Except* eh)
{
Except_throw(eh, "NetPlatform_addRoute is not implemented in this platform.");
}
static void addIp4Address(const char* interfaceName,
const uint8_t address[4],
int prefixLen,
struct Log* logger,
struct Except* eh)
{
// TODO(cjd): implement this and then remove the exception from TUNInterface_ipv4_root_test.c
Except_throw(eh, "unimplemented");
}
void NetPlatform_setRoutes(const char* ifName,
struct Sockaddr** prefixSet,
int prefixCount,
struct Log* logger,
struct Allocator* tempAlloc,
struct Except* eh)
{
Except_throw(eh, "NetPlatform_setRoutes is not implemented in this platform.");
}
static void checkRunningInstance(struct Allocator* allocator,
struct EventBase* base,
String* addr,
String* password,
struct Log* logger,
struct Except* eh)
{
struct Allocator* alloc = Allocator_child(allocator);
struct Sockaddr_storage pingAddrStorage;
if (Sockaddr_parse(addr->bytes, &pingAddrStorage)) {
Except_throw(eh, "Unable to parse [%s] as an ip address port, eg: 127.0.0.1:11234",
addr->bytes);
}
struct AdminClient* adminClient =
AdminClient_new(&pingAddrStorage.addr, password, base, logger, alloc);
// 100 milliseconds is plenty to wait for a process to respond on the same machine.
adminClient->millisecondsToWait = 100;
Dict* pingArgs = Dict_new(alloc);
struct AdminClient_Promise* pingPromise =
AdminClient_rpcCall(String_new("ping", alloc), pingArgs, adminClient, alloc);
struct CheckRunningInstanceContext* ctx =
Allocator_malloc(alloc, sizeof(struct CheckRunningInstanceContext));
ctx->base = base;
ctx->alloc = alloc;
ctx->res = NULL;
pingPromise->callback = checkRunningInstanceCallback;
pingPromise->userData = ctx;
EventBase_beginLoop(base);
Assert_true(ctx->res);
if (ctx->res->err != AdminClient_Error_TIMEOUT) {
Except_throw(eh, "Startup failed: cjdroute is already running. [%d]", ctx->res->err);
}
Allocator_free(alloc);
}
/**
* Get a socket and ifRequest for a given interface by name.
*
* @param interfaceName the name of the interface, eg: tun0
* @param af either AF_INET or AF_INET6
* @param eg an exception handler in case something goes wrong.
* this will send a -1 for all errors.
* @param ifRequestOut an ifreq which will be populated with the interface index of the interface.
* @return a socket for interacting with this interface.
*/
static int socketForIfName(const char* interfaceName,
int af,
struct Except* eh,
struct ifreq* ifRequestOut)
{
int s;
if ((s = socket(af, SOCK_DGRAM, 0)) < 0) {
Except_throw(eh, "socket() [%s]", strerror(errno));
}
memset(ifRequestOut, 0, sizeof(struct ifreq));
strncpy(ifRequestOut->ifr_name, interfaceName, IFNAMSIZ);
if (ioctl(s, SIOCGIFINDEX, ifRequestOut) < 0) {
int err = errno;
close(s);
Except_throw(eh, "ioctl(SIOCGIFINDEX) [%s]", strerror(err));
}
return s;
}
static void installFilter(struct sock_fprog* filter, struct Log* logger, struct Except* eh)
{
struct sigaction sa = { .sa_sigaction = catchViolation, .sa_flags = SA_SIGINFO };
if (sigaction(SIGSYS, &sa, NULL)) {
Log_warn(logger, "sigaction(SIGSYS) -> [%s]\n", strerror(errno));
}
if (prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0) == -1) {
// don't worry about it.
Log_warn(logger, "prctl(PR_SET_NO_NEW_PRIVS) -> [%s]\n", strerror(errno));
}
if (prctl(PR_SET_SECCOMP, SECCOMP_MODE_FILTER, filter) == -1) {
Except_throw(eh, "prctl(PR_SET_SECCOMP) -> [%s]\n", strerror(errno));
}
}
static void addIp6Address(const char* interfaceName,
const uint8_t address[16],
int prefixLen,
struct Log* logger,
struct Except* eh)
{
/* stringify our IP address */
char myIp[40];
AddrTools_printIp((uint8_t*)myIp, address);
/* set up the interface ip assignment request */
struct in6_aliasreq in6_addreq;
memset(&in6_addreq, 0, sizeof(in6_addreq));
in6_addreq.ifra_lifetime.ia6t_vltime = ND6_INFINITE_LIFETIME;
in6_addreq.ifra_lifetime.ia6t_pltime = ND6_INFINITE_LIFETIME;
/* parse the IPv6 address and add it to the request */
struct addrinfo hints, *result;
bzero(&hints, sizeof(struct addrinfo));
hints.ai_family = AF_INET6;
int err = getaddrinfo((const char *)myIp, NULL, &hints, &result);
if (err) {
// Should never happen since the address is specified as binary.
Except_throw(eh, "bad IPv6 address [%s]", gai_strerror(err));
}
memcpy(&in6_addreq.ifra_addr, result->ai_addr, result->ai_addrlen);
/* turn the prefixlen into a mask, and add it to the request */
struct sockaddr_in6* mask = &in6_addreq.ifra_prefixmask;
u_char *cp;
int len = prefixLen;
mask->sin6_len = sizeof(*mask);
if ((prefixLen == 0) || (prefixLen == 128)) {
memset(&mask->sin6_addr, 0xff, sizeof(struct in6_addr));
} else {
memset((void *)&mask->sin6_addr, 0x00, sizeof(mask->sin6_addr));
for (cp = (u_char *)&mask->sin6_addr; len > 7; len -= 8) {
*cp++ = 0xff;
}
*cp = 0xff << (8 - len);
}
strncpy(in6_addreq.ifra_name, interfaceName, sizeof(in6_addreq.ifra_name));
/* do the actual assignment ioctl */
int s = socket(AF_INET6, SOCK_DGRAM, 0);
if (s < 0) {
Except_throw(eh, "socket() [%s]", strerror(errno));
}
if (ioctl(s, SIOCAIFADDR_IN6, &in6_addreq) < 0) {
int err = errno;
close(s);
Except_throw(eh, "ioctl(SIOCAIFADDR) [%s]", strerror(err));
}
Log_info(logger, "Configured IPv6 [%s/%i] for [%s]", myIp, prefixLen, interfaceName);
close(s);
}
struct Iface* TUNInterface_new(const char* interfaceName,
char assignedInterfaceName[TUNInterface_IFNAMSIZ],
int isTapMode,
struct EventBase* base,
struct Log* logger,
struct Except* eh,
struct Allocator* alloc)
{
if (isTapMode) { Except_throw(eh, "tap mode not supported on this platform"); }
int maxNameSize = (IFNAMSIZ < TUNInterface_IFNAMSIZ) ? IFNAMSIZ : TUNInterface_IFNAMSIZ;
int tunUnit = 0; /* allocate dynamically by default */
if (interfaceName) {
int parsedUnit = 0;
if (sscanf(interfaceName, "utun%i", &parsedUnit) != 1 || parsedUnit < 0) {
Except_throw(eh, "Invalid utun device %s", interfaceName);
}
tunUnit = parsedUnit + 1; /* device number used is unit - 1*/
}
Log_info(logger,
"Initializing utun interface: %s\n",
(interfaceName ? interfaceName : "auto"));
int tunFd = socket(PF_SYSTEM, SOCK_DGRAM, SYSPROTO_CONTROL);
if (tunFd < 0) {
Except_throw(eh, "socket(PF_SYSTEM, SOCK_DGRAM, SYSPROTO_CONTROL) [%s]", strerror(errno));
}
/* get the utun control id */
struct ctl_info info;
memset(&info, 0, sizeof(info));
strncpy(info.ctl_name, APPLE_UTUN_CONTROL, strlen(APPLE_UTUN_CONTROL));
if (ioctl(tunFd, CTLIOCGINFO, &info) < 0) {
int err = errno;
close(tunFd);
Except_throw(eh, "getting utun device id [%s]", strerror(err));
}
/* connect the utun device */
struct sockaddr_ctl addr;
addr.sc_id = info.ctl_id;
addr.sc_len = sizeof(addr);
addr.sc_family = AF_SYSTEM;
addr.ss_sysaddr = AF_SYS_CONTROL;
addr.sc_unit = tunUnit;
if (connect(tunFd, (struct sockaddr*)&addr, sizeof(addr)) < 0) {
int err = errno;
close(tunFd);
Except_throw(eh, "connecting to utun device [%s]", strerror(err));
}
char assignedIfName[TUNInterface_IFNAMSIZ];
if (!assignedInterfaceName) { assignedInterfaceName = assignedIfName; }
/* retrieve the assigned utun interface name */
if (getsockopt(tunFd, SYSPROTO_CONTROL, UTUN_OPT_IFNAME,
assignedInterfaceName, (uint32_t*) &maxNameSize) >= 0) {
Log_info(logger, "Initialized utun interface [%s]\n", assignedInterfaceName);
} else {
int err = errno;
close(tunFd);
Except_throw(eh, "getting utun interface name [%s]", strerror(err));
}
struct Pipe* p = Pipe_forFiles(tunFd, tunFd, base, eh, alloc);
struct BSDMessageTypeWrapper* bmtw = BSDMessageTypeWrapper_new(alloc, logger);
Iface_plumb(&p->iface, &bmtw->wireSide);
return &bmtw->inside;
}
struct Interface* TUNInterface_new(const char* interfaceName,
char assignedInterfaceName[TUNInterface_IFNAMSIZ],
int isTapMode,
struct EventBase* base,
struct Log* logger,
struct Except* eh,
struct Allocator* alloc)
{
// tap mode is not supported at all by the sunos tun driver.
if (isTapMode) {
Except_throw(eh, "tap mode not supported on this platform");
}
// Extract the number eg: 0 from tun0
int ppa = 0;
if (interfaceName) {
for (uint32_t i = 0; i < strlen(interfaceName); i++) {
if (isdigit(interfaceName[i])) {
ppa = atoi(interfaceName);
}
}
}
// Open the descriptor
int tunFd = open("/dev/tun", O_RDWR);
// Either the name is specified and we use TUNSETPPA,
// or it's not specified and we just want a TUNNEWPPA
if (ppa) {
ppa = ioctl(tunFd, TUNSETPPA, ppa);
} else {
ppa = ioctl(tunFd, TUNNEWPPA, -1);
}
int ipFd = open("/dev/ip6", O_RDWR, 0);
int tunFd2 = open("/dev/tun", O_RDWR, 0);
if (tunFd < 0 || ipFd < 0 || ppa < 0 || tunFd2 < 0) {
int err = errno;
close(tunFd);
close(ipFd);
close(tunFd2);
char* error = NULL;
if (tunFd < 0) {
error = "open(\"/dev/tun\")";
} else if (ipFd < 0) {
error = "open(\"/dev/ip6\")";
} else if (ppa < 0) {
error = "ioctl(TUNNEWPPA)";
} else if (tunFd2 < 0) {
error = "open(\"/dev/tun\") (opening for plumbing interface)";
}
Except_throw(eh, "%s [%s]", error, strerror(err));
}
struct lifreq ifr = {
.lifr_ppa = ppa,
.lifr_flags = IFF_IPV6
};
// Since devices are numbered rather than named, it's not possible to have tun0 and cjdns0
// so we'll skip the pretty names and call everything tunX
int maxNameSize = (LIFNAMSIZ < TUNInterface_IFNAMSIZ) ? LIFNAMSIZ : TUNInterface_IFNAMSIZ;
if (assignedInterfaceName) {
snprintf(assignedInterfaceName, maxNameSize, "tun%d", ppa);
}
snprintf(ifr.lifr_name, maxNameSize, "tun%d", ppa);
char* error = NULL;
if (ioctl(tunFd, I_SRDOPT, RMSGD) < 0) {
error = "putting tun into message-discard mode";
} else if (ioctl(tunFd2, I_PUSH, "ip") < 0) {
// add the ip module
error = "ioctl(I_PUSH)";
} else if (ioctl(tunFd2, SIOCSLIFNAME, &ifr) < 0) {
// set the name of the interface and specify it as ipv6
error = "ioctl(SIOCSLIFNAME)";
} else if (ioctl(ipFd, I_LINK, tunFd2) < 0) {
// link the device to the ipv6 router
error = "ioctl(I_LINK)";
}
if (error) {
int err = errno;
close(ipFd);
close(tunFd2);
close(tunFd);
Except_throw(eh, "%s [%s]", error, strerror(err));
}
close(ipFd);
struct Pipe* p = Pipe_forFiles(tunFd, tunFd, base, eh, alloc);
struct TUNInterface_Illumos_pvt* ctx =
Allocator_clone(alloc, (&(struct TUNInterface_Illumos_pvt) {
.pipe = p
}));
int main(int argc, char** argv)
{
Assert_ifParanoid(argc > 0);
struct Allocator* allocator = MallocAllocator_new(1<<23);
if (argc != 6 || (argc == 2 &&
(!(CString_strcmp(argv[1], "--help") == 0) || (CString_strcmp(argv[1], "-h") == 0)))) {
return usage(allocator, argv[0]);
}
struct Except* eh = NULL;
struct EventBase* eventBase = EventBase_new(allocator);
struct Log* logger = FileWriterLog_new(stdout, allocator);
String* privateKey = String_new(argv[3], allocator);
String* adminBind = String_new(argv[4], allocator);
String* adminPass = String_new(argv[5], allocator);
String* logTo = String_new("stdout", allocator);
// --------------------- Welcome to cjdns ---------------------- //
char* sysInfo = SysInfo_describe(SysInfo_detect(), allocator);
Log_info(logger, "Cjdns %s %s", ArchInfo_getArchStr(), sysInfo);
// --------------------- Setup Pipes to Angel --------------------- //
struct Allocator* corePipeAlloc = Allocator_child(allocator);
String* corePipeDir = String_new(argv[1], allocator);
String* corePipeName = String_new(argv[2], allocator);
if (!Defined(win32) && access(corePipeDir->bytes, W_OK)) {
Except_throw(eh, "Don't have write permission to [%s].", corePipeDir->bytes);
}
Assert_ifParanoid(EventBase_eventCount(eventBase) == 0);
struct Pipe* corePipe = Pipe_named(corePipeDir->bytes, corePipeName->bytes,
eventBase, eh, corePipeAlloc);
Assert_ifParanoid(EventBase_eventCount(eventBase) == 2);
corePipe->logger = logger;
// --------------------- Pre-Configure Core ------------------------- //
Dict* preConf = Dict_new(allocator);
Dict* adminPreConf = Dict_new(allocator);
Dict* logPreConf = Dict_new(allocator);
Dict_putDict(preConf, String_CONST("admin"), adminPreConf, allocator);
Dict_putDict(preConf, String_CONST("logging"), logPreConf, allocator);
Dict_putString(preConf, String_CONST("privateKey"), privateKey, allocator);
Dict_putString(adminPreConf, String_CONST("bind"), adminBind, allocator);
Dict_putString(adminPreConf, String_CONST("pass"), adminPass, allocator);
Dict_putString(logPreConf, String_CONST("logTo"), logTo, allocator);
struct Message* toCoreMsg = Message_new(0, 1024, allocator);
BencMessageWriter_write(preConf, toCoreMsg, eh);
Iface_CALL(corePipe->iface.send, toCoreMsg, &corePipe->iface);
Log_debug(logger, "Sent [%d] bytes to core.", toCoreMsg->length);
// --------------------- Get Response from Core --------------------- //
struct Message* fromCoreMsg =
InterfaceWaiter_waitForData(&corePipe->iface, eventBase, allocator, eh);
Dict* responseFromCore = BencMessageReader_read(fromCoreMsg, allocator, eh);
// --------------------- Close the Core Pipe --------------------- //
Allocator_free(corePipeAlloc);
corePipe = NULL;
// --------------------- Get Admin Addr/Port/Passwd --------------------- //
Dict* responseFromCoreAdmin = Dict_getDict(responseFromCore, String_CONST("admin"));
adminBind = Dict_getString(responseFromCoreAdmin, String_CONST("bind"));
if (!adminBind) {
Except_throw(eh, "Didn't get ADMIN_BIND back from cjdroute.");
}
struct Sockaddr_storage adminAddr;
if (Sockaddr_parse(adminBind->bytes, &adminAddr)) {
Except_throw(eh, "Unable to parse [%s] as an IP address:port.",
adminBind->bytes);
}
Assert_ifParanoid(EventBase_eventCount(eventBase) == 0);
Log_info(logger, "Admin API ready at [%s].", adminBind->bytes);
return 0;
}
static Iface_DEFUN sendMessage(struct Message* msg, struct Iface* iface)
{
struct ETHInterface_pvt* ctx =
Identity_containerOf(iface, struct ETHInterface_pvt, pub.generic.iface);
struct Sockaddr* sa = (struct Sockaddr*) msg->bytes;
Assert_true(msg->length >= Sockaddr_OVERHEAD);
Assert_true(sa->addrLen <= ETHInterface_Sockaddr_SIZE);
struct ETHInterface_Sockaddr sockaddr = { .generic = { .addrLen = 0 } };
Message_pop(msg, &sockaddr, sa->addrLen, NULL);
struct sockaddr_ll addr;
Bits_memcpy(&addr, &ctx->addrBase, sizeof(struct sockaddr_ll));
if (sockaddr.generic.flags & Sockaddr_flags_BCAST) {
Bits_memset(addr.sll_addr, 0xff, 6);
} else {
Bits_memcpy(addr.sll_addr, sockaddr.mac, 6);
}
struct ETHInterface_Header hdr = {
.version = ETHInterface_CURRENT_VERSION,
.zero = 0,
.length_be = Endian_hostToBigEndian16(msg->length + ETHInterface_Header_SIZE),
.fc00_be = Endian_hostToBigEndian16(0xfc00)
};
Message_push(msg, &hdr, ETHInterface_Header_SIZE, NULL);
struct Except* eh = NULL;
sendMessageInternal(msg, &addr, ctx, eh);
return NULL;
}
static void handleEvent2(struct ETHInterface_pvt* context, struct Allocator* messageAlloc)
{
struct Message* msg = Message_new(MAX_PACKET_SIZE, PADDING, messageAlloc);
struct sockaddr_ll addr;
uint32_t addrLen = sizeof(struct sockaddr_ll);
// Knock it out of alignment by 2 bytes so that it will be
// aligned when the idAndPadding is shifted off.
Message_shift(msg, 2, NULL);
int rc = recvfrom(context->socket,
msg->bytes,
msg->length,
0,
(struct sockaddr*) &addr,
&addrLen);
if (rc < ETHInterface_Header_SIZE) {
Log_debug(context->logger, "Failed to receive eth frame");
return;
}
Assert_true(msg->length >= rc);
msg->length = rc;
//Assert_true(addrLen == SOCKADDR_LL_LEN);
struct ETHInterface_Header hdr;
Message_pop(msg, &hdr, ETHInterface_Header_SIZE, NULL);
// here we could put a switch statement to handle different versions differently.
if (hdr.version != ETHInterface_CURRENT_VERSION) {
Log_debug(context->logger, "DROP unknown version");
return;
}
uint16_t reportedLength = Endian_bigEndianToHost16(hdr.length_be);
reportedLength -= ETHInterface_Header_SIZE;
if (msg->length != reportedLength) {
if (msg->length < reportedLength) {
Log_debug(context->logger, "DROP size field is larger than frame");
return;
}
msg->length = reportedLength;
}
if (hdr.fc00_be != Endian_hostToBigEndian16(0xfc00)) {
Log_debug(context->logger, "DROP bad magic");
return;
}
struct ETHInterface_Sockaddr sockaddr = { .zero = 0 };
Bits_memcpy(sockaddr.mac, addr.sll_addr, 6);
sockaddr.generic.addrLen = ETHInterface_Sockaddr_SIZE;
if (addr.sll_pkttype == PACKET_BROADCAST) {
sockaddr.generic.flags |= Sockaddr_flags_BCAST;
}
Message_push(msg, &sockaddr, ETHInterface_Sockaddr_SIZE, NULL);
Assert_true(!((uintptr_t)msg->bytes % 4) && "Alignment fault");
Iface_send(&context->pub.generic.iface, msg);
}
static void handleEvent(void* vcontext)
{
struct ETHInterface_pvt* context = Identity_check((struct ETHInterface_pvt*) vcontext);
struct Allocator* messageAlloc = Allocator_child(context->pub.generic.alloc);
handleEvent2(context, messageAlloc);
Allocator_free(messageAlloc);
}
List* ETHInterface_listDevices(struct Allocator* alloc, struct Except* eh)
{
List* out = List_new(alloc);
#ifndef android
struct ifaddrs* ifaddr = NULL;
if (getifaddrs(&ifaddr) || ifaddr == NULL) {
Except_throw(eh, "getifaddrs() -> errno:%d [%s]", errno, strerror(errno));
}
for (struct ifaddrs* ifa = ifaddr; ifa; ifa = ifa->ifa_next) {
if (ifa->ifa_addr && ifa->ifa_addr->sa_family == AF_PACKET) {
List_addString(out, String_new(ifa->ifa_name, alloc), alloc);
}
}
freeifaddrs(ifaddr);
#endif
return out;
}
static int closeSocket(struct Allocator_OnFreeJob* j)
{
struct ETHInterface_pvt* ctx = Identity_check((struct ETHInterface_pvt*) j->userData);
close(ctx->socket);
return 0;
}
struct ETHInterface* ETHInterface_new(struct EventBase* eventBase,
const char* bindDevice,
struct Allocator* alloc,
struct Except* exHandler,
struct Log* logger)
{
struct ETHInterface_pvt* ctx = Allocator_calloc(alloc, sizeof(struct ETHInterface_pvt), 1);
Identity_set(ctx);
ctx->pub.generic.iface.send = sendMessage;
ctx->pub.generic.alloc = alloc;
ctx->logger = logger;
struct ifreq ifr = { .ifr_ifindex = 0 };
ctx->socket = socket(AF_PACKET, SOCK_DGRAM, Ethernet_TYPE_CJDNS);
if (ctx->socket == -1) {
Except_throw(exHandler, "call to socket() failed. [%s]", strerror(errno));
}
Allocator_onFree(alloc, closeSocket, ctx);
CString_strncpy(ifr.ifr_name, bindDevice, IFNAMSIZ - 1);
ctx->ifName = String_new(bindDevice, alloc);
if (ioctl(ctx->socket, SIOCGIFINDEX, &ifr) == -1) {
Except_throw(exHandler, "failed to find interface index [%s]", strerror(errno));
}
ctx->ifindex = ifr.ifr_ifindex;
if (ioctl(ctx->socket, SIOCGIFFLAGS, &ifr) < 0) {
Except_throw(exHandler, "ioctl(SIOCGIFFLAGS) [%s]", strerror(errno));
}
if (!((ifr.ifr_flags & IFF_UP) && (ifr.ifr_flags & IFF_RUNNING))) {
Log_info(logger, "Bringing up interface [%s]", ifr.ifr_name);
ifr.ifr_flags |= IFF_UP | IFF_RUNNING;
if (ioctl(ctx->socket, SIOCSIFFLAGS, &ifr) < 0) {
Except_throw(exHandler, "ioctl(SIOCSIFFLAGS) [%s]", strerror(errno));
}
}
ctx->addrBase = (struct sockaddr_ll) {
.sll_family = AF_PACKET,
.sll_protocol = Ethernet_TYPE_CJDNS,
.sll_ifindex = ctx->ifindex,
.sll_hatype = ARPHRD_ETHER,
.sll_pkttype = PACKET_OTHERHOST,
.sll_halen = ETH_ALEN
};
if (bind(ctx->socket, (struct sockaddr*) &ctx->addrBase, sizeof(struct sockaddr_ll))) {
Except_throw(exHandler, "call to bind() failed [%s]", strerror(errno));
}
Socket_makeNonBlocking(ctx->socket);
Event_socketRead(handleEvent, ctx, ctx->socket, eventBase, alloc, exHandler);
return &ctx->pub;
}
int main(int argc, char** argv)
{
#ifdef Log_KEYS
fprintf(stderr, "Log_LEVEL = KEYS, EXPECT TO SEE PRIVATE KEYS IN YOUR LOGS!\n");
#endif
if (argc < 2) {
// Fall through.
} else if (!CString_strcmp("angel", argv[1])) {
return AngelInit_main(argc, argv);
} else if (!CString_strcmp("core", argv[1])) {
return Core_main(argc, argv);
}
Assert_ifParanoid(argc > 0);
struct Except* eh = NULL;
// Allow it to allocate 8MB
struct Allocator* allocator = MallocAllocator_new(1<<23);
struct Random* rand = Random_new(allocator, NULL, eh);
struct EventBase* eventBase = EventBase_new(allocator);
if (argc == 2) {
// one argument
if ((CString_strcmp(argv[1], "--help") == 0) || (CString_strcmp(argv[1], "-h") == 0)) {
return usage(allocator, argv[0]);
} else if (CString_strcmp(argv[1], "--genconf") == 0) {
return genconf(rand);
} else if (CString_strcmp(argv[1], "--pidfile") == 0) {
// deprecated
fprintf(stderr, "'--pidfile' option is deprecated.\n");
return 0;
} else if (CString_strcmp(argv[1], "--reconf") == 0) {
// Performed after reading the configuration
} else if (CString_strcmp(argv[1], "--bench") == 0) {
return benchmark();
} else if ((CString_strcmp(argv[1], "--version") == 0)
|| (CString_strcmp(argv[1], "-v") == 0))
{
printf("Cjdns protocol version: %d\n", Version_CURRENT_PROTOCOL);
return 0;
} else if (CString_strcmp(argv[1], "--cleanconf") == 0) {
// Performed after reading configuration
} else if (CString_strcmp(argv[1], "--nobg") == 0) {
// Performed while reading configuration
} else {
fprintf(stderr, "%s: unrecognized option '%s'\n", argv[0], argv[1]);
fprintf(stderr, "Try `%s --help' for more information.\n", argv[0]);
return -1;
}
} else if (argc > 2) {
// more than one argument?
fprintf(stderr, "%s: too many arguments [%s]\n", argv[0], argv[1]);
fprintf(stderr, "Try `%s --help' for more information.\n", argv[0]);
// because of '--pidfile $filename'?
if (CString_strcmp(argv[1], "--pidfile") == 0)
{
fprintf(stderr, "\n'--pidfile' option is deprecated.\n");
}
return -1;
}
if (isatty(STDIN_FILENO)) {
// We were started from a terminal
// The chances an user wants to type in a configuration
// bij hand are pretty slim so we show him the usage
return usage(allocator, argv[0]);
} else {
// We assume stdin is a configuration file and that we should
// start routing
}
struct Reader* stdinReader = FileReader_new(stdin, allocator);
Dict config;
if (JsonBencSerializer_get()->parseDictionary(stdinReader, allocator, &config)) {
fprintf(stderr, "Failed to parse configuration.\n");
return -1;
}
if (argc == 2 && CString_strcmp(argv[1], "--cleanconf") == 0) {
struct Writer* stdoutWriter = FileWriter_new(stdout, allocator);
JsonBencSerializer_get()->serializeDictionary(stdoutWriter, &config);
printf("\n");
return 0;
}
int forceNoBackground = 0;
if (argc == 2 && CString_strcmp(argv[1], "--nobg") == 0) {
forceNoBackground = 1;
}
struct Writer* logWriter = FileWriter_new(stdout, allocator);
struct Log* logger = WriterLog_new(logWriter, allocator);
// --------------------- Get Admin --------------------- //
Dict* configAdmin = Dict_getDict(&config, String_CONST("admin"));
String* adminPass = Dict_getString(configAdmin, String_CONST("password"));
String* adminBind = Dict_getString(configAdmin, String_CONST("bind"));
if (!adminPass) {
adminPass = String_newBinary(NULL, 32, allocator);
Random_base32(rand, (uint8_t*) adminPass->bytes, 32);
adminPass->len = CString_strlen(adminPass->bytes);
}
if (!adminBind) {
Except_throw(eh, "You must specify admin.bind in the cjdroute.conf file.");
}
// --------------------- Welcome to cjdns ---------------------- //
char* archInfo = ArchInfo_describe(ArchInfo_detect(), allocator);
char* sysInfo = SysInfo_describe(SysInfo_detect(), allocator);
Log_info(logger, "Cjdns %s %s", archInfo, sysInfo);
// --------------------- Check for running instance --------------------- //
Log_info(logger, "Checking for running instance...");
checkRunningInstance(allocator, eventBase, adminBind, adminPass, logger, eh);
// --------------------- Setup Pipes to Angel --------------------- //
char angelPipeName[64] = "client-angel-";
Random_base32(rand, (uint8_t*)angelPipeName+13, 31);
Assert_ifParanoid(EventBase_eventCount(eventBase) == 0);
struct Pipe* angelPipe = Pipe_named(angelPipeName, eventBase, eh, allocator);
Assert_ifParanoid(EventBase_eventCount(eventBase) == 2);
angelPipe->logger = logger;
char* args[] = { "angel", angelPipeName, NULL };
// --------------------- Spawn Angel --------------------- //
String* privateKey = Dict_getString(&config, String_CONST("privateKey"));
char* corePath = Process_getPath(allocator);
if (!corePath) {
Except_throw(eh, "Can't find a usable cjdns core executable, "
"make sure it is in the same directory as cjdroute");
}
if (!privateKey) {
Except_throw(eh, "Need to specify privateKey.");
}
Log_info(logger, "Forking angel to background.");
Process_spawn(corePath, args, eventBase, allocator);
// --------------------- Get user for angel to setuid() ---------------------- //
String* securityUser = NULL;
List* securityConf = Dict_getList(&config, String_CONST("security"));
for (int i = 0; securityConf && i < List_size(securityConf); i++) {
securityUser = Dict_getString(List_getDict(securityConf, i), String_CONST("setuser"));
if (securityUser) {
int64_t* ea = Dict_getInt(List_getDict(securityConf, i), String_CONST("exemptAngel"));
if (ea && *ea) {
securityUser = NULL;
}
break;
}
}
// --------------------- Pre-Configure Angel ------------------------- //
Dict* preConf = Dict_new(allocator);
Dict* adminPreConf = Dict_new(allocator);
Dict_putDict(preConf, String_CONST("admin"), adminPreConf, allocator);
Dict_putString(adminPreConf, String_CONST("core"), String_new(corePath, allocator), allocator);
Dict_putString(preConf, String_CONST("privateKey"), privateKey, allocator);
Dict_putString(adminPreConf, String_CONST("bind"), adminBind, allocator);
Dict_putString(adminPreConf, String_CONST("pass"), adminPass, allocator);
if (securityUser) {
Dict_putString(adminPreConf, String_CONST("user"), securityUser, allocator);
}
Dict* logging = Dict_getDict(&config, String_CONST("logging"));
if (logging) {
Dict_putDict(preConf, String_CONST("logging"), logging, allocator);
}
struct Message* toAngelMsg = Message_new(0, 1024, allocator);
BencMessageWriter_write(preConf, toAngelMsg, eh);
Interface_sendMessage(&angelPipe->iface, toAngelMsg);
Log_debug(logger, "Sent [%d] bytes to angel process", toAngelMsg->length);
// --------------------- Get Response from Angel --------------------- //
struct Message* fromAngelMsg =
InterfaceWaiter_waitForData(&angelPipe->iface, eventBase, allocator, eh);
Dict* responseFromAngel = BencMessageReader_read(fromAngelMsg, allocator, eh);
// --------------------- Get Admin Addr/Port/Passwd --------------------- //
Dict* responseFromAngelAdmin = Dict_getDict(responseFromAngel, String_CONST("admin"));
adminBind = Dict_getString(responseFromAngelAdmin, String_CONST("bind"));
if (!adminBind) {
Except_throw(eh, "didn't get address and port back from angel");
}
struct Sockaddr_storage adminAddr;
if (Sockaddr_parse(adminBind->bytes, &adminAddr)) {
Except_throw(eh, "Unable to parse [%s] as an ip address port, eg: 127.0.0.1:11234",
adminBind->bytes);
}
// sanity check, Pipe_named() creates 2 events, see above.
Assert_ifParanoid(EventBase_eventCount(eventBase) == 2);
// --------------------- Configuration ------------------------- //
Configurator_config(&config,
&adminAddr.addr,
adminPass,
eventBase,
logger,
allocator);
// --------------------- noBackground ------------------------ //
int64_t* noBackground = Dict_getInt(&config, String_CONST("noBackground"));
if (forceNoBackground || (noBackground && *noBackground)) {
EventBase_beginLoop(eventBase);
}
//Allocator_free(allocator);
return 0;
}
struct Iface* TUNInterface_new(const char* interfaceName,
char assignedInterfaceName[TUNInterface_IFNAMSIZ],
int isTapMode,
struct EventBase* base,
struct Log* logger,
struct Except* eh,
struct Allocator* alloc)
{
char deviceFile[TUNInterface_IFNAMSIZ];
if (isTapMode) { Except_throw(eh, "tap mode not supported on this platform"); }
// We are on FreeBSD so we just need to read /dev/tunxx to create the tun interface
if (interfaceName) {
snprintf(deviceFile,TUNInterface_IFNAMSIZ,"/dev/%s",interfaceName);
} else {
snprintf(deviceFile,TUNInterface_IFNAMSIZ,"%s","/dev/tun");
}
// Open the descriptor
int tunFd = open(deviceFile, O_RDWR);
//Get the resulting device name
const char* assignedDevname;
assignedDevname = fdevname(tunFd);
// Extract the number eg: 0 from tun0
int ppa = 0;
for (uint32_t i = 0; i < strlen(assignedDevname); i++) {
if (isdigit(assignedDevname[i])) {
ppa = atoi(assignedDevname+i);
break;
}
}
if (tunFd < 0 || ppa < 0 ) {
int err = errno;
close(tunFd);
char* error = NULL;
if (tunFd < 0) {
error = "open(\"/dev/tun\")";
} else if (ppa < 0) {
error = "fdevname/getting number from fdevname";
}
Except_throw(eh, "%s [%s]", error, strerror(err));
}
// Since devices are numbered rather than named, it's not possible to have tun0 and cjdns0
// so we'll skip the pretty names and call everything tunX
if (assignedInterfaceName) {
snprintf(assignedInterfaceName, TUNInterface_IFNAMSIZ, "tun%d", ppa);
}
char* error = NULL;
// We want to send IPv6 through our tun device, so we need to be able to specify "ethertype"
int tunhead = 1;
if (ioctl(tunFd,TUNSIFHEAD,&tunhead) == -1) {
error = "TUNSIFHEAD";
}
if (error) {
int err = errno;
close(tunFd);
Except_throw(eh, "%s [%s]", error, strerror(err));
}
struct Pipe* p = Pipe_forFiles(tunFd, tunFd, base, eh, alloc);
struct BSDMessageTypeWrapper* bmtw = BSDMessageTypeWrapper_new(alloc, logger);
Iface_plumb(&p->iface, &bmtw->wireSide);
return &bmtw->inside;
}
