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#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "test_fuzz_isis_tlv_tests.h"
#include <zebra.h>
#include "memory.h"
#include "sbuf.h"
#include "stream.h"
#include "frrevent.h"
#include "isisd/isis_circuit.h"
#include "isisd/isis_tlvs.h"
#include "test_common.h"
#define TEST_STREAM_SIZE 1500
static bool atexit_registered;
static void show_meminfo_at_exit(void)
{
log_memstats(stderr, "isis fuzztest");
}
static int comp_line(const void *p1, const void *p2)
{
return strcmp(*(char * const *)p1, *(char * const *)p2);
}
static char *sortlines(char *in)
{
size_t line_count = 1;
size_t rv_len = strlen(in) + 1;
size_t rv_pos = 0;
char *rv = XMALLOC(MTYPE_TMP, rv_len);
for (char *c = in; *c; c++) {
if (*c == '\n')
line_count++;
}
if (line_count == 1) {
strncpy(rv, in, rv_len);
return rv;
}
char **lines = XCALLOC(MTYPE_TMP, sizeof(char *)*line_count);
char *saveptr = NULL;
size_t i = 0;
for (char *line = strtok_r(in, "\n", &saveptr); line;
line = strtok_r(NULL, "\n", &saveptr)) {
lines[i++] = line;
assert(i <= line_count);
}
line_count = i;
qsort(lines, line_count, sizeof(char *), comp_line);
for (i = 0; i < line_count; i++) {
int printf_rv = snprintf(rv + rv_pos, rv_len - rv_pos, "%s\n", lines[i]);
assert(printf_rv >= 0);
rv_pos += printf_rv;
}
XFREE(MTYPE_TMP, lines);
return rv;
}
static int test(FILE *input, FILE *output)
{
struct stream *s = stream_new(TEST_STREAM_SIZE);
char buf[TEST_STREAM_SIZE];
size_t bytes_read = 0;
if (!atexit_registered) {
atexit(show_meminfo_at_exit);
atexit_registered = true;
}
while (STREAM_WRITEABLE(s) && !feof(input)) {
bytes_read = fread(buf, 1, STREAM_WRITEABLE(s), input);
if (bytes_read == 0)
break;
stream_put(s, buf, bytes_read);
}
if (bytes_read && !feof(input)) {
fprintf(output, "Too much input data.\n");
stream_free(s);
return 1;
}
stream_set_getp(s, 0);
struct isis_tlvs *tlvs;
const char *log;
int rv = isis_unpack_tlvs(STREAM_READABLE(s), s, &tlvs, &log);
if (rv) {
fprintf(output, "Could not unpack TLVs:\n%s\n", log);
isis_free_tlvs(tlvs);
stream_free(s);
return 2;
}
fprintf(output, "Unpack log:\n%s", log);
const char *s_tlvs = isis_format_tlvs(tlvs, NULL);
fprintf(output, "Unpacked TLVs:\n%s", s_tlvs);
struct isis_item *orig_auth = tlvs->isis_auth.head;
tlvs->isis_auth.head = NULL;
s_tlvs = isis_format_tlvs(tlvs, NULL);
struct isis_tlvs *tlv_copy = isis_copy_tlvs(tlvs);
tlvs->isis_auth.head = orig_auth;
isis_free_tlvs(tlvs);
struct stream *s2 = stream_new(TEST_STREAM_SIZE);
if (isis_pack_tlvs(tlv_copy, s2, (size_t)-1, false, false)) {
fprintf(output, "Could not pack TLVs.\n");
assert(0);
}
stream_set_getp(s2, 0);
rv = isis_unpack_tlvs(STREAM_READABLE(s2), s2, &tlvs, &log);
if (rv) {
fprintf(output, "Could not unpack own TLVs:\n%s\n", log);
assert(0);
}
char *orig_tlvs = XSTRDUP(MTYPE_TMP, s_tlvs);
s_tlvs = isis_format_tlvs(tlvs, NULL);
if (strcmp(orig_tlvs, s_tlvs)) {
fprintf(output,
"Deserialized and Serialized LSP seem to differ.\n");
fprintf(output, "Re-Unpacked TLVs:\n%s", s_tlvs);
assert(0);
}
isis_free_tlvs(tlv_copy);
stream_free(s);
stream_free(s2);
struct list *fragments = isis_fragment_tlvs(tlvs, 550);
isis_free_tlvs(tlvs);
if (!fragments) {
XFREE(MTYPE_TMP, orig_tlvs);
return 0;
}
s = stream_new(550);
struct sbuf fragment_format;
sbuf_init(&fragment_format, NULL, 0);
struct listnode *node;
for (ALL_LIST_ELEMENTS_RO(fragments, node, tlvs)) {
stream_reset(s);
int rv = isis_pack_tlvs(tlvs, s, (size_t)-1, false, false);
if (rv) {
fprintf(output, "Could not pack fragment, too large.\n");
assert(0);
}
sbuf_push(&fragment_format, 0, "%s", isis_format_tlvs(tlvs, NULL));
isis_free_tlvs(tlvs);
}
list_delete(&fragments);
stream_free(s);
char *fragment_content = sortlines((char *)sbuf_buf(&fragment_format));
sbuf_free(&fragment_format);
char *orig_tlv_content = sortlines(orig_tlvs);
XFREE(MTYPE_TMP, orig_tlvs);
if (strcmp(fragment_content, orig_tlv_content)) {
fprintf(output, "Fragmented and unfragmented LSP seem to differ.\n");
fprintf(output, "Original:\n%s\nFragmented:\n%s\n",
orig_tlv_content, fragment_content);
assert(0);
}
XFREE(MTYPE_TMP, fragment_content);
XFREE(MTYPE_TMP, orig_tlv_content);
return 0;
}
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