/*! \brief Validates struct uses.
*
* \param ip_table
* the interprocedural symbol table.
*
* Pointers to structs with the same name but different definitions have been
* merged into unions containing pointers to each struct type. We now need
* to search for OP_arrow and OP_dot expressions that reference these unions
* and add an OP_dot so they get the correct pointer out of the union.
*/
void
Plink_ValidateTypes (SymbolTable ip_table)
{
SymTabEntry e;
Key k;
for (k = PST_GetTableEntryByType (ip_table, ET_FUNC | ET_VAR);
P_ValidKey (k);
k = PST_GetTableEntryByTypeNext (ip_table, k, ET_FUNC | ET_VAR))
{
e = PST_GetSymTabEntry (ip_table, k);
if (P_GetSymTabEntryType (e) == ET_FUNC)
{
FuncDcl f = P_GetSymTabEntryFuncDcl (e);
P_StmtApplyPost (P_GetFuncDclStmt (f), NULL, fix_multi_ref,
ip_table);
}
else
{
VarDcl v = P_GetSymTabEntryVarDcl (e);
validate_init (ip_table, P_GetVarDclInit (v), P_GetVarDclType (v));
}
}
return;
}
int CMEM_exit(void)
{
int result = 0;
__D("exit: entered - ref_count %d, cmem_fd %d\n", ref_count, cmem_fd);
if (!validate_init()) {
return -1;
}
__D("exit: decrementing ref_count\n");
ref_count--;
if (ref_count == 0) {
result = close(cmem_fd);
__D("exit: ref_count == 0, closed /dev/cmem (%s)\n",
result == -1 ? strerror(errno) : "succeeded");
/* setting -3 allows to distinguish CMEM exit from CMEM failed */
cmem_fd = -3;
}
__D("exit: exiting, returning %d\n", result);
return result;
}
static int getBlock(int blockid, unsigned long *pphys_base, size_t *psize)
{
union CMEM_AllocUnion block;
int rv;
__D("getBlock: entered\n");
if (!validate_init()) {
return -1;
}
block.blockid = blockid;
rv = ioctl(cmem_fd, CMEM_IOCGETBLOCK | CMEM_IOCMAGIC, &block);
if (rv != 0) {
__E("getBlock: Failed to retrieve memory block bounds for block %d "
"from driver: %d.\n", blockid, rv);
return -1;
}
*pphys_base = block.get_block_outparams.physp;
*psize = block.get_block_outparams.size;
__D("getBlock: exiting, ioctl CMEM_IOCGETBLOCK succeeded, "
"returning *pphys_base=0x%lx, *psize=0x%x\n", *pphys_base, *psize);
return 0;
}
/*! \brief Validates a variable initializer.
*
* \param ip_table
* the interprocedural symbol table.
* \param init
* the Init to validate.
* \param type
* the Type of the variable being initialized.
*
* If a variable used to be declared:
*
* struct *s = (struct *)0;
*
* it is now declared
*
* union s = (struct *)0;
*
* And should be declared
*
* union s = { (struct *)0 };
*
* This function does this transformation. It recurses into aggregate
* initializers to find multi unions hidden inside.
*/
static void
validate_init (SymbolTable ip_table, Init init, Type type)
{
Init i;
StructDcl s;
UnionDcl u;
Field f;
if (init)
{
if (is_multi_type (ip_table, type))
{
/* Copy init's fields to i and set i as init->set. */
i = P_NewInit ();
P_SetInitExpr (i, P_GetInitExpr (init));
P_SetInitNext (i, P_GetInitNext (init));
P_SetInitSet (i, P_GetInitSet (init));
P_SetInitExpr (init, NULL);
P_SetInitNext (init, NULL);
P_SetInitSet (init, i);
}
else if (PST_IsStructureType (ip_table, type))
{
if (PST_GetTypeBasicType (ip_table, type) & BT_STRUCT)
{
s = PST_GetTypeStructDcl (ip_table, type);
for (f = P_GetStructDclFields (s), i = P_GetInitSet (init);
f && i; f = P_GetFieldNext (f), i = P_GetInitNext (i))
validate_init (ip_table, i, P_GetFieldType (f));
}
else
{
u = PST_GetTypeUnionDcl (ip_table, type);
/* Only the first field in the union can be initialized. */
validate_init (ip_table, P_GetInitSet (init),
P_GetFieldType (P_GetUnionDclFields (u)));
}
}
}
return;
}
static void *allocPool(int blockid, int poolid, CMEM_AllocParams *params)
{
if (params == NULL) {
params = &CMEM_DEFAULTPARAMS;
}
__D("allocPool: entered w/ poolid %d, params - flags %s%s\n", poolid,
params->flags & CMEM_CACHED ? "CACHED" : "NONCACHED",
params == &CMEM_DEFAULTPARAMS ? " (default)" : "");
if (!validate_init()) {
return NULL;
}
return allocFromPool(blockid, poolid, params);
}
static int getPoolFromBlock(int blockid, size_t size)
{
union CMEM_AllocUnion poolDesc;
if (!validate_init()) {
return -1;
}
poolDesc.get_pool_inparams.size = size;
poolDesc.get_pool_inparams.blockid = blockid;
if (ioctl(cmem_fd, CMEM_IOCGETPOOL | CMEM_IOCMAGIC, &poolDesc) == -1) {
__E("getPool: Failed to get a pool fitting a size %d\n", size);
return -1;
}
__D("getPool: exiting, ioctl CMEM_IOCGETPOOL succeeded, returning %d\n",
poolDesc.poolid);
return poolDesc.poolid;
}
int CMEM_cacheInv(void *ptr, size_t size)
{
struct block_struct block;
__D("cacheInv: entered w/ addr %p, size %#x\n", ptr, size);
if (!validate_init()) {
return -1;
}
block.addr = (unsigned long)ptr;
block.size = size;
if (ioctl(cmem_fd, CMEM_IOCCACHEINV | CMEM_IOCMAGIC, &block) == -1) {
__E("cacheInv: Failed to invalidate %#x\n", (unsigned int) ptr);
return -1;
}
__D("cacheInv: exiting, ioctl CMEM_IOCCACHEINV succeeded, returning 0\n");
return 0;
}
unsigned long CMEM_getPhys(void *ptr)
{
union CMEM_AllocUnion getDesc;
__D("getPhys: entered w/ addr %p\n", ptr);
if (!validate_init()) {
return 0;
}
getDesc.virtp = (unsigned long)ptr;
if (ioctl(cmem_fd, CMEM_IOCGETPHYS | CMEM_IOCMAGIC, &getDesc) == -1) {
__E("getPhys: Failed to get physical address of %#x\n",
(unsigned int) ptr);
return 0;
}
__D("getPhys: exiting, ioctl CMEM_IOCGETPHYS succeeded, returning %#lx\n",
getDesc.physp);
return getDesc.physp;
}
int CMEM_free(void *ptr, CMEM_AllocParams *params)
{
union CMEM_AllocUnion freeDesc;
unsigned int cmd;
size_t size;
if (params == NULL) {
params = &CMEM_DEFAULTPARAMS;
}
__D("free: entered w/ ptr %p, params - type %s%s\n",
ptr,
params->type == CMEM_POOL ? "POOL" : "HEAP",
params == &CMEM_DEFAULTPARAMS ? " (default)" : "");
if (!validate_init()) {
return -1;
}
freeDesc.virtp = (int)ptr;
cmd = CMEM_IOCFREE | params->type;
if (ioctl(cmem_fd, cmd | CMEM_IOCMAGIC, &freeDesc) == -1) {
__E("free: failed to free %#x\n", (unsigned int) ptr);
return -1;
}
size = freeDesc.free_outparams.size;
__D("free: ioctl CMEM_IOCFREE%s succeeded, size %#x\n",
params->type == CMEM_POOL ? "POOL" : "HEAP", size);
if (munmap(ptr, size) == -1) {
__E("free: failed to munmap %#x\n", (unsigned int) ptr);
return -1;
}
__D("free: munmap succeeded, returning 0\n");
return 0;
}
int CMEM_getNumBlocks(int *pnblocks)
{
int rv;
__D("getNumBlocks: entered\n");
if (!validate_init()) {
return -1;
}
rv = ioctl(cmem_fd, CMEM_IOCGETNUMBLOCKS | CMEM_IOCMAGIC, pnblocks);
if (rv != 0) {
__E("getBlock: Failed to retrieve number of blocks "
"from driver: %d.\n", rv);
return -1;
}
__D("getNumBlocks: exiting, ioctl CMEM_IOCGETNUMBLOCKS succeeded, "
"returning *pnblocks=%d\n", *pnblocks);
return 0;
}
int CMEM_getVersion(void)
{
unsigned int version;
int rv;
__D("getVersion: entered\n");
if (!validate_init()) {
return -1;
}
rv = ioctl(cmem_fd, CMEM_IOCGETVERSION | CMEM_IOCMAGIC, &version);
if (rv != 0) {
__E("getVersion: Failed to retrieve version from driver: %d.\n", rv);
return -1;
}
__D("getVersion: exiting, ioctl CMEM_IOCGETVERSION returned %#x\n",
version);
return version;
}
/*
* Single interface into all flavors of alloc.
* Need to support:
* - cached vs. noncached
* - heap vs. pool
* - alignment w/ heap allocs
*/
static void *alloc(int blockid, size_t size, CMEM_AllocParams *params)
{
if (params == NULL) {
params = &CMEM_DEFAULTPARAMS;
}
__D("alloc: entered w/ size %#x, params - type %s, flags %s, align %#x%s\n",
size,
params->type == CMEM_POOL ? "POOL" : "HEAP",
params->flags & CMEM_CACHED ? "CACHED" : "NONCACHED",
params->alignment,
params == &CMEM_DEFAULTPARAMS ? " (default)" : "");
if (!validate_init()) {
return NULL;
}
if (params->type == CMEM_POOL) {
return getAndAllocFromPool(blockid, size, params);
}
else {
return allocFromHeap(blockid, size, params);
}
}
// global sender initialize (not thread specific)
iterator_t* send_init(void)
{
// generate a new primitive root and starting position
iterator_t *it;
it = iterator_init(zconf.senders, zconf.shard_num, zconf.total_shards);
// process the dotted-notation addresses passed to ZMAP and determine
// the source addresses from which we'll send packets;
srcip_first = inet_addr(zconf.source_ip_first);
if (srcip_first == INADDR_NONE) {
log_fatal("send", "invalid begin source ip address: `%s'",
zconf.source_ip_first);
}
srcip_last = inet_addr(zconf.source_ip_last);
if (srcip_last == INADDR_NONE) {
log_fatal("send", "invalid end source ip address: `%s'",
zconf.source_ip_last);
}
log_debug("send", "srcip_first: %u", srcip_first);
log_debug("send", "srcip_last: %u", srcip_last);
if (srcip_first == srcip_last) {
srcip_offset = 0;
num_src_addrs = 1;
} else {
uint32_t ip_first = ntohl(srcip_first);
uint32_t ip_last = ntohl(srcip_last);
assert(ip_first && ip_last);
assert(ip_last > ip_first);
uint32_t offset = (uint32_t) (aesrand_getword(zconf.aes) & 0xFFFFFFFF);
srcip_offset = offset % (srcip_last - srcip_first);
num_src_addrs = ip_last - ip_first + 1;
}
// process the source port range that ZMap is allowed to use
num_src_ports = zconf.source_port_last - zconf.source_port_first + 1;
log_debug("send", "will send from %i address%s on %u source ports",
num_src_addrs, ((num_src_addrs ==1 ) ? "":"es"),
num_src_ports);
// global initialization for send module
assert(zconf.probe_module);
if (zconf.probe_module->global_initialize) {
zconf.probe_module->global_initialize(&zconf);
}
// concert specified bandwidth to packet rate
if (zconf.bandwidth > 0) {
int pkt_len = zconf.probe_module->packet_length;
pkt_len *= 8;
pkt_len += 8*24; // 7 byte MAC preamble, 1 byte Start frame,
// 4 byte CRC, 12 byte inter-frame gap
if (pkt_len < 84*8) {
pkt_len = 84*8;
}
if (zconf.bandwidth / pkt_len > 0xFFFFFFFF) {
zconf.rate = 0;
} else {
zconf.rate = zconf.bandwidth / pkt_len;
if (zconf.rate == 0) {
log_warn("send", "bandwidth %lu bit/s is slower than 1 pkt/s, "
"setting rate to 1 pkt/s", zconf.bandwidth);
zconf.rate = 1;
}
}
log_debug("send", "using bandwidth %lu bits/s, rate set to %d pkt/s",
zconf.bandwidth, zconf.rate);
}
// Get the source hardware address, and give it to the probe
// module
if (!zconf.hw_mac_set) {
if (get_iface_hw_addr(zconf.iface, zconf.hw_mac)) {
log_fatal("send", "could not retrieve hardware address for "
"interface: %s", zconf.iface);
return NULL;
}
log_debug("send", "no source MAC provided. "
"automatically detected %02x:%02x:%02x:%02x:%02x:%02x as hw "
"interface for %s",
zconf.hw_mac[0], zconf.hw_mac[1], zconf.hw_mac[2],
zconf.hw_mac[3], zconf.hw_mac[4], zconf.hw_mac[5],
zconf.iface);
}
log_debug("send", "source MAC address %02x:%02x:%02x:%02x:%02x:%02x",
zconf.hw_mac[0], zconf.hw_mac[1], zconf.hw_mac[2],
zconf.hw_mac[3], zconf.hw_mac[4], zconf.hw_mac[5]);
if (zconf.dryrun) {
log_info("send", "dryrun mode -- won't actually send packets");
}
// initialize random validation key
validate_init();
zsend.start = now();
return it;
}
// global sender initialize (not thread specific)
int send_init(void)
{
// generate a new primitive root and starting position
cyclic_init(0, 0);
zsend.first_scanned = cyclic_get_curr_ip();
// compute number of targets
uint64_t allowed = blacklist_count_allowed();
if (allowed == (1LL << 32)) {
zsend.targets = 0xFFFFFFFF;
} else {
zsend.targets = allowed;
}
if (zsend.targets > zconf.max_targets) {
zsend.targets = zconf.max_targets;
}
// process the dotted-notation addresses passed to ZMAP and determine
// the source addresses from which we'll send packets;
srcip_first = inet_addr(zconf.source_ip_first);
if (srcip_first == INADDR_NONE) {
log_fatal("send", "invalid begin source ip address: `%s'",
zconf.source_ip_first);
}
srcip_last = inet_addr(zconf.source_ip_last);
if (srcip_last == INADDR_NONE) {
log_fatal("send", "invalid end source ip address: `%s'",
zconf.source_ip_last);
}
if (srcip_first == srcip_last) {
srcip_offset = 0;
num_addrs = 1;
} else {
srcip_offset = rand() % (srcip_last - srcip_first);
num_addrs = ntohl(srcip_last) - ntohl(srcip_first) + 1;
}
// process the source port range that ZMap is allowed to use
num_src_ports = zconf.source_port_last - zconf.source_port_first + 1;
log_debug("send", "will send from %i address%s on %u source ports",
num_addrs, ((num_addrs==1)?"":"es"), num_src_ports);
// global initialization for send module
assert(zconf.probe_module);
if (zconf.probe_module->global_initialize) {
zconf.probe_module->global_initialize(&zconf);
}
// concert specified bandwidth to packet rate
if (zconf.bandwidth > 0) {
int pkt_len = zconf.probe_module->packet_length;
pkt_len *= 8;
pkt_len += 8*24; // 7 byte MAC preamble, 1 byte Start frame,
// 4 byte CRC, 12 byte inter-frame gap
if (pkt_len < 84*8) {
pkt_len = 84*8;
}
if (zconf.bandwidth / pkt_len > 0xFFFFFFFF) {
zconf.rate = 0;
} else {
zconf.rate = zconf.bandwidth / pkt_len;
if (zconf.rate == 0) {
log_warn("send", "bandwidth %lu bit/s is slower than 1 pkt/s, "
"setting rate to 1 pkt/s", zconf.bandwidth);
zconf.rate = 1;
}
}
log_debug("send", "using bandwidth %lu bits/s, rate set to %d pkt/s",
zconf.bandwidth, zconf.rate);
}
if (zconf.dryrun) {
log_info("send", "dryrun mode -- won't actually send packets");
}
// initialize random validation key
validate_init();
zsend.start = now();
return EXIT_SUCCESS;
}