/*
* Initialize anything that must be initialized before dissecting
* packets.
*
* This should be called at the beginning of the program; it does
* not need to be called, and should not be called, for every
* netdissect_options structure.
*/
int
nd_init(char *errbuf, size_t errbuf_size)
{
#ifdef _WIN32
WORD wVersionRequested;
WSADATA wsaData;
int err;
/*
* Request Winsock 2.2; we expect Winsock 2.
*/
wVersionRequested = MAKEWORD(2, 2);
err = WSAStartup(wVersionRequested, &wsaData);
if (err != 0) {
strlcpy(errbuf, "Attempting to initialize Winsock failed",
errbuf_size);
return (-1);
}
#endif /* _WIN32 */
#ifdef USE_LIBSMI
/*
* XXX - should we just fail if this fails? Some of the
* libsmi calls may fail.
*/
smiInit("tcpdump");
#endif
/*
* Clears the error buffer, and uses it so we don't get
* "unused argument" warnings at compile time.
*/
strlcpy(errbuf, "", errbuf_size);
return (0);
}
/*
* Reads the named file as an SMI module. Returns an array containing
* the module name and a Hash with OID symbols as keys and the numeric
* OIDs as values.
*/
static VALUE
fsmi_load_smi_module(VALUE self, VALUE filename)
{
int init_ret;
char* load_ret;
char* cfilename;
SmiModule* module;
VALUE module_name;
VALUE oid_hash;
init_ret = smiInit(NULL);
if (init_ret != 0) {
rb_raise(rb_eRuntimeError, "libsmi init error: %d", init_ret);
}
cfilename = STR2CSTR(filename);
load_ret = smiLoadModule(cfilename);
if (load_ret == NULL) {
rb_raise(rb_eRuntimeError, "%s for module '%s'", strerror(errno), cfilename);
}
module = smiGetFirstModule();
if (module == NULL) {
rb_raise(rb_eRuntimeError, "No module found in %s", cfilename);
}
module_name = rb_str_new2(module->name);
oid_hash = get_oid_hash(module);
return rb_ary_new3(2, module_name, oid_hash);
}
