static size_t
rdata_from_str_string(const uint8_t *src, ubuf *u) {
const uint8_t *ptr = src;
size_t u_orig_size = ubuf_size(u);
bool is_quoted;
if (*ptr == '"') {
is_quoted = true;
ptr++;
} else {
is_quoted = false;
}
while (*ptr) {
if (is_quoted && *ptr == '"') {
ptr++;
return ptr-src;
} else if ((!is_quoted) && isspace(*ptr)) {
break;
} else if (*ptr == '\\') {
ptr++;
if (*ptr == 0) {
goto err;
} else if (*ptr == '"' || *ptr == '\\') {
ubuf_append(u, ptr++, 1);
} else if (isdigit(*ptr)) {
char dstr[4] = { 0, 0, 0, 0 };
uint8_t c;
uint16_t c_in;
strncpy(dstr, (const char *)ptr, sizeof(dstr)-1);
if (! (isdigit(dstr[1]) && isdigit(dstr[2]))) {
goto err;
}
if (sscanf(dstr, "%hu", &c_in) == 0) {
goto err;
}
c = (uint8_t) c_in;
if (c != c_in) {
goto err;
}
ubuf_append(u, &c, 1);
ptr += 3;
} else {
goto err;
}
} else if (*ptr >= ' ' && *ptr <= '~') {
ubuf_append(u, ptr++, 1);
} else {
goto err;
}
}
if (!is_quoted) {
return ptr-src;
}
err:
ubuf_clip(u, u_orig_size);
return 0;
}
static bool
parse_next_key(struct block_iter *bi)
{
bi->current = next_entry_offset(bi);
uint8_t *p = bi->data + bi->current;
uint8_t *limit = bi->data + bi->restarts;
if (p >= limit) {
/* no more entries to return, mark as invalid */
bi->current = bi->restarts;
bi->restart_index = bi->num_restarts;
return (false);
}
/* decode next entry */
uint32_t shared, non_shared, value_length;
p = decode_entry(p, limit, &shared, &non_shared, &value_length);
assert(!(p == NULL || ubuf_size(bi->key) < shared));
ubuf_clip(bi->key, shared);
ubuf_append(bi->key, p, non_shared);
bi->next = p + non_shared + value_length;
bi->val = p + non_shared;
bi->val_len = value_length;
while (bi->restart_index + 1 < bi->num_restarts &&
get_restart_point(bi, bi->restart_index + 1) < bi->current)
{
bi->restart_index += 1;
}
return (true);
}
static size_t
rdata_to_str_string(const uint8_t *src, ubuf *u) {
size_t len;
uint8_t oclen;
oclen = *src++;
ubuf_add_cstr(u, "\"");
len = oclen;
while (len--) {
uint8_t c;
c = *src++;
if (c == '"') {
ubuf_add_cstr(u, "\\\"");
} else if (c == '\\') {
ubuf_add_cstr(u, "\\\\");
} else if (c >= ' ' && c <= '~') {
ubuf_append(u, &c, 1);
} else {
ubuf_add_fmt(u, "\\%.3d", c);
}
}
ubuf_add_cstr(u, "\" ");
return (oclen + 1); /* number of bytes consumed from src */
}
static int
test6(void)
{
int ret = 0;
ubuf *v = ubuf_init(16);
ubuf_append(v, (uint8_t *) str_array, sizeof(str_array));
ubuf_clip(v, 17);
if (ubuf_size(v) != 17)
ret |= 1;
ubuf_destroy(&v);
return (ret);
}
static int
test3(void)
{
int ret = 0;
ubuf *v;
v = ubuf_init(16);
ubuf_append(v, (uint8_t *) str_array, sizeof(str_array));
for (unsigned i = 0; i < ubuf_size(v); i++) {
//fprintf(stderr, "v->v[%d] = '%c'\n", i, v->v[i]);
if (ubuf_value(v, i) != str_array[i])
ret |= 1;
}
ubuf_destroy(&v);
return (ret);
}
static int
test4(void)
{
int ret = 0;
ubuf *v;
v = ubuf_init(0);
for (unsigned i = 0; i < 1024; i++)
ubuf_append(v, (uint8_t *) str_array, sizeof(str_array));
for (unsigned i = 0; i < ubuf_size(v); i++) {
unsigned j = i % sizeof(str_array);
/*
fprintf(stderr, "v->v[%d] = '%c', str_array[%d] = '%c'\n",
i, v->v[i], j, str_array[j]);
*/
if (ubuf_value(v, i) != str_array[j])
ret |= 1;
}
ubuf_destroy(&v);
return (ret);
}
wdns_res
_wdns_str_to_rdata_ubuf(ubuf *u, const char *str,
uint16_t rrtype, uint16_t rrclass) {
wdns_res res;
const record_descr *descr = NULL;
size_t u_orig_size = ubuf_size(u);
if (rrtype < record_descr_len)
descr = &record_descr_array[rrtype];
if (rrtype >= record_descr_len ||
(descr != NULL && descr->types[0] == rdf_unknown))
{
/* generic encoding */
if (strncmp(str, "\\#", 2)) {
res = wdns_res_parse_error;
goto err;
}
str += 2;
if (!isspace(*str)) {
res = wdns_res_parse_error;
goto err;
}
while (*str && isspace(*str)) {
str++;
}
const char * ptr = str;
while (*ptr && !isspace(*ptr)) {
if (!isdigit(*ptr)) {
res = wdns_res_parse_error;
goto err;
}
ptr++;
}
uint16_t rdlen;
if (sscanf(str, "%hu", &rdlen) == 0) {
res = wdns_res_parse_error;
goto err;
}
str = ptr;
size_t len = 0;
while (*str) {
uint8_t c;
if (isspace(*str)) {
str++;
continue;
}
if (*(str+1) == 0) {
res = wdns_res_parse_error;
goto err;
}
if (!sscanf(str, "%02hhx", &c)) {
res = wdns_res_parse_error;
goto err;
}
ubuf_append(u, &c, 1);
len++;
str += 2;
}
if (len != rdlen) {
res = wdns_res_parse_error;
goto err;
}
return (wdns_res_success);
} else if (descr != NULL && !(descr->record_class == class_un ||
descr->record_class == rrclass))
{
return (wdns_res_success);
}
for (const uint8_t *t = &descr->types[0]; *t != rdf_end; t++) {
if (str == NULL) {
break;
}
while (isspace(*str)) {
str++;
}
if (*str == 0) {
break;
}
switch (*t) {
case rdf_name:
case rdf_uname: {
wdns_name_t *name;
char * s;
const char *end = strpbrk(str, " \t\r\n");
if (end != NULL) {
s = strndup(str, end-str);
} else {
s = strdup(str);
}
name = calloc(1, sizeof(*name));
res = wdns_str_to_name(s, name);
if (res != wdns_res_success) {
free(s);
free(name);
goto err;
}
ubuf_append(u, name->data, name->len);
str = end;
free(s);
if(name->data) {
free (name->data);
}
free(name);
break;
}
case rdf_bytes:
while (*str) {
uint8_t c;
if (*(str+1) == 0) {
res = wdns_res_parse_error;
goto err;
}
if (!sscanf(str, "%02hhx", &c)) {
res = wdns_res_parse_error;
goto err;
}
ubuf_append(u, &c, 1);
str += 2;
}
break;
case rdf_bytes_b64: {
base64_decodestate b64;
char *buf;
size_t str_len = strlen(str);
size_t buf_len;
base64_init_decodestate(&b64);
buf = malloc(str_len+1);
buf_len = base64_decode_block((const char *) str, str_len, buf, &b64);
ubuf_append(u, (uint8_t *) buf, buf_len);
free(buf);
str += str_len;
break;
}
case rdf_bytes_str: {
size_t str_len = strlen(str);
if (str_len >= 3 && str[0] == '"' && str[str_len - 1] == '"') {
if (rdata_from_str_string((const uint8_t *)str, u) == 0) {
res = wdns_res_parse_error;
goto err;
}
str += str_len;
} else {
res = wdns_res_parse_error;
goto err;
}
break;
}
case rdf_ipv6prefix: {
uint8_t prefix_len;
const char *end = strpbrk(str, " \t\r\n");
const char *ptr = str;
if (end == NULL) {
end = str + strlen(str);
}
while (ptr < end) {
if (!isdigit(*ptr++)) {
res = wdns_res_parse_error;
goto err;
}
}
if (sscanf(str, "%hhu", &prefix_len) == 0) {
res = wdns_res_parse_error;
goto err;
}
if (prefix_len > 128) {
res = wdns_res_parse_error;
goto err;
}
ubuf_append(u, &prefix_len, sizeof(prefix_len));
str = end;
if (str) {
while (isspace(*str)) {
str++;
}
}
if (prefix_len > 0) {
if (str == NULL || *str == 0) {
res = wdns_res_parse_error;
goto err;
}
end = strpbrk(str, " \t\r\n");
uint8_t oclen = prefix_len / 8;
if (prefix_len % 8 > 0) {
oclen++;
}
uint8_t addr[16];
char * pres;
if (end != NULL) {
pres = strndup(str, end-str);
} else {
pres = strdup(str);
}
int pton_res = inet_pton(AF_INET6, pres, addr);
free(pres);
if (pton_res == 1) {
ubuf_append(u, addr, oclen);
} else {
res = wdns_res_parse_error;
goto err;
}
str = end;
}
break;
}
case rdf_salt: {
const char *end = strpbrk(str, " \t\r\n");
if (end == NULL) {
end = str + strlen(str);
}
if (*str == '-' && (end-str) == 1) {
uint8_t c = 0;
ubuf_append(u, &c, 1);
str++;
} else {
if (end-str > (2*UINT8_MAX) || (end-str) % 2 == 1) {
res = wdns_res_parse_error;
goto err;
}
uint8_t oclen = (uint8_t)(end-str)/2;
ubuf_append(u, &oclen, 1);
while (oclen > 0) {
uint8_t c;
if (!sscanf(str, "%02hhx", &c)) {
res = wdns_res_parse_error;
goto err;
}
ubuf_append(u, &c, 1);
str += 2;
oclen--;
}
}
break;
}
case rdf_hash: {
char *buf;
size_t buf_len;
const char *end = strpbrk(str, " \t\r\n");
if (end == NULL) {
end = str + strlen(str);
}
size_t str_len = end-str;
buf = malloc(str_len);
buf_len = base32_decode(buf, str_len, str, str_len);
uint8_t oclen = (uint8_t)buf_len;
if (oclen != buf_len) {
free(buf);
res = wdns_res_parse_error;
goto err;
}
ubuf_append(u, &oclen, 1);
ubuf_append(u, (uint8_t *) buf, oclen);
free(buf);
str = end;
break;
}
case rdf_int8: {
uint64_t s_val;
uint8_t val;
const char *ptr = str;
const char *end = strpbrk(str, " \t\r\n");
if (end == NULL) {
end = str + strlen(str);
}
while (ptr < end) {
if (!isdigit(*ptr++)) {
res = wdns_res_parse_error;
goto err;
}
}
if (sscanf(str, "%" PRIu64, &s_val)) {
val = (uint8_t)s_val;
if (val != s_val) {
res = wdns_res_parse_error;
goto err;
}
ubuf_append(u, &val, sizeof(val));
}
str = end;
break;
}
case rdf_int16: {
uint64_t s_val;
uint16_t val;
const char *ptr = str;
const char *end = strpbrk(str, " \t\r\n");
if (end == NULL) {
end = str + strlen(str);
}
while (ptr < end) {
if (!isdigit(*ptr++)) {
res = wdns_res_parse_error;
goto err;
}
}
if (sscanf(str, "%" PRIu64, &s_val)) {
val = (uint16_t)s_val;
if (val != s_val) {
res = wdns_res_parse_error;
goto err;
}
val = htons(val);
ubuf_append(u, (uint8_t*)&val, sizeof(val));
}
str = end;
break;
}
case rdf_int32: {
uint64_t s_val;
uint32_t val;
const char *ptr = str;
const char *end = strpbrk(str, " \t\r\n");
if (end == NULL) {
end = str + strlen(str);
}
while (ptr < end) {
if (!isdigit(*ptr++)) {
res = wdns_res_parse_error;
goto err;
}
}
if (sscanf(str, "%" PRIu64, &s_val)) {
val = (uint32_t)s_val;
if (val != s_val) {
res = wdns_res_parse_error;
goto err;
}
val = htonl(val);
ubuf_append(u, (uint8_t*)&val, sizeof(val));
}
str = end;
break;
}
case rdf_ipv4: {
uint8_t addr[4];
char * pres;
int pton_res;
const char *end = strpbrk(str, " \t\r\n");
if (end == NULL) {
end = str + strlen(str);
}
pres = strdup(str);
pres[end-str] = 0;
pton_res = inet_pton(AF_INET, pres, addr);
free(pres);
if (pton_res == 1) {
ubuf_append(u, addr, sizeof(addr));
} else {
res = wdns_res_parse_error;
goto err;
}
str = end;
break;
}
case rdf_ipv6: {
uint8_t addr[16];
char * pres;
int pton_res;
const char *end = strpbrk(str, " \t\r\n");
if (end != NULL) {
pres = strndup(str, end-str);
} else {
pres = strdup(str);
}
pton_res = inet_pton(AF_INET6, pres, addr);
free(pres);
if (pton_res == 1) {
ubuf_append(u, addr, sizeof(addr));
} else {
res = wdns_res_parse_error;
goto err;
}
str = end;
break;
}
case rdf_eui48: {
uint8_t a[6] = {0};
int ret;
if (strlen(str) != strlen("01-02-03-04-05-06")) {
res = wdns_res_parse_error;
goto err;
}
for (int i = 0; i < 6; i++) {
if (!isxdigit(str[3*i]) ||
!isxdigit(str[3*i + 1]) ||
(i < 5 && str[3*i + 2] != '-'))
{
res = wdns_res_parse_error;
goto err;
}
}
ret = sscanf(str, "%02hhx-%02hhx-%02hhx-%02hhx-%02hhx-%02hhx",
&a[0], &a[1], &a[2], &a[3], &a[4], &a[5]);
if (ret != 6) {
res = wdns_res_parse_error;
goto err;
}
ubuf_append(u, a, 6);
str += strlen(str);
break;
}
case rdf_eui64: {
uint8_t a[8] = {0};
int ret;
if (strlen(str) != strlen("01-02-03-04-05-06-07-08")) {
res = wdns_res_parse_error;
goto err;
}
for (int i = 0; i < 8; i++) {
if (!isxdigit(str[3*i]) ||
!isxdigit(str[3*i + 1]) ||
(i < 7 && str[3*i + 2] != '-'))
{
res = wdns_res_parse_error;
goto err;
}
}
ret = sscanf(str, "%02hhx-%02hhx-%02hhx-%02hhx-%02hhx-%02hhx-%02hhx-%02hhx",
&a[0], &a[1], &a[2], &a[3], &a[4], &a[5], &a[6], &a[7]);
if (ret != 8) {
res = wdns_res_parse_error;
goto err;
}
ubuf_append(u, a, 8);
str += strlen(str);
break;
}
case rdf_string: {
const char * end = str;
size_t u_oclen_offset;
size_t str_len;
uint8_t oclen = 0;
u_oclen_offset = ubuf_size(u);
ubuf_append(u, &oclen, sizeof(oclen));
end += rdata_from_str_string((const uint8_t*)str, u);
if (end == str) {
res = wdns_res_parse_error;
goto err;
}
str_len = ubuf_size(u) - u_oclen_offset - 1;
oclen = (uint8_t)str_len;
if (oclen != str_len) {
res = wdns_res_parse_error;
goto err;
}
ubuf_data(u)[u_oclen_offset] = oclen;
str = end;
break;
}
case rdf_repstring: {
const char * end;
size_t u_oclen_offset;
size_t str_len;
uint8_t oclen = 0;
while (*str) {
if (isspace(*str)) {
str++;
continue;
}
end = str;
oclen = 0;
u_oclen_offset = ubuf_size(u);
ubuf_append(u, &oclen, sizeof(oclen));
end += rdata_from_str_string((const uint8_t*)str, u);
if (end == str) {
res = wdns_res_parse_error;
goto err;
}
str_len = ubuf_size(u) - u_oclen_offset - 1;
oclen = (uint8_t)str_len;
if (oclen != str_len) {
res = wdns_res_parse_error;
goto err;
}
ubuf_data(u)[u_oclen_offset] = oclen;
str = end;
}
break;
}
case rdf_rrtype: {
char * s_rrtype;
uint16_t my_rrtype;
const char *end = strpbrk(str, " \t\r\n");
if (end != NULL) {
s_rrtype = strndup(str, end-str);
} else {
s_rrtype = strdup(str);
}
my_rrtype = htons(wdns_str_to_rrtype(s_rrtype));
free(s_rrtype);
if (my_rrtype > 0) {
ubuf_append(u, (const uint8_t*)&my_rrtype, sizeof(my_rrtype));
} else {
res = wdns_res_parse_error;
goto err;
}
str = end;
break;
}
case rdf_type_bitmap: {
const char *end;
char *s_rrtype;
u16buf *rrtypes;
uint16_t my_rrtype, last_rrtype;
size_t n;
uint8_t window_block, bitmap_len;
uint8_t bitmap[32];
rrtypes = u16buf_init(16);
if (! rrtypes) {
res = wdns_res_malloc;
goto err;
}
while (str != NULL && *str) {
if (isspace(*str)) {
str++;
continue;
}
end = strpbrk(str, " \t\r\n");
if (end != NULL) {
s_rrtype = strndup(str, end-str);
} else {
s_rrtype = strdup(str);
}
my_rrtype = wdns_str_to_rrtype(s_rrtype);
free(s_rrtype);
if (my_rrtype == 0 || (rrtype >= 128 && rrtype < 256) || rrtype == 65535) {
u16buf_destroy(&rrtypes);
res = wdns_res_parse_error;
goto err;
}
u16buf_add(rrtypes, my_rrtype);
str = end;
}
qsort(u16buf_ptr(rrtypes), u16buf_size(rrtypes), sizeof(uint16_t), cmp_u16);
memset(bitmap, 0, sizeof(bitmap));
window_block = 0;
bitmap_len = 0;
last_rrtype = 0;
for (n = 0; n < u16buf_size(rrtypes); n++) {
my_rrtype = u16buf_value(rrtypes, n);
if (my_rrtype == last_rrtype) {
continue;
}
last_rrtype = my_rrtype;
uint8_t cur_window = my_rrtype / 256;
if (cur_window != window_block) {
ubuf_append(u, (const uint8_t*)&window_block, sizeof(window_block));
ubuf_append(u, (const uint8_t*)&bitmap_len, sizeof(bitmap_len));
ubuf_append(u, (const uint8_t*)bitmap, bitmap_len);
memset(bitmap, 0, sizeof(bitmap));
window_block = cur_window;
}
uint8_t offset = my_rrtype % 256;
uint8_t byte = offset / 8;
uint8_t bit = offset % 8;
bitmap[byte] |= 0x80 >> bit;
bitmap_len = 1 + byte;
}
ubuf_append(u, (const uint8_t*)&window_block, sizeof(window_block));
ubuf_append(u, (const uint8_t*)&bitmap_len, sizeof(bitmap_len));
ubuf_append(u, (const uint8_t*)bitmap, bitmap_len);
u16buf_destroy(&rrtypes);
break;
}
default: {
res = wdns_res_failure;
goto err;
}
} /* switch */
}
return wdns_res_success;
err:
ubuf_clip(u, u_orig_size);
return res;
}
void
_wdns_rdata_to_ubuf(ubuf *u, const uint8_t *rdata, uint16_t rdlen,
uint16_t rrtype, uint16_t rrclass)
{
#define bytes_required(n) do { \
if (src_bytes < ((signed) (n))) \
goto err; \
} while(0)
#define bytes_consumed(n) do { \
src += n; \
src_bytes -= n; \
} while(0)
char domain_name[WDNS_PRESLEN_NAME];
const record_descr *descr;
const uint8_t *src;
size_t len;
ssize_t src_bytes;
uint8_t oclen;
wdns_res res;
if (rrtype < record_descr_len)
descr = &record_descr_array[rrtype];
if (rrtype >= record_descr_len || descr->types[0] == rdf_unknown) {
/* generic encoding */
ubuf_add_cstr(u, "\\# ");
ubuf_add_fmt(u, "%u ", rdlen);
for (unsigned i = 0; i < rdlen; i++)
ubuf_add_fmt(u, "%02x ", rdata[i]);
return;
} else if (!(descr->record_class == class_un ||
descr->record_class == rrclass))
{
return;
}
src = rdata;
src_bytes = (ssize_t) rdlen;
for (const uint8_t *t = &descr->types[0]; *t != rdf_end; t++) {
if (src_bytes == 0)
break;
switch (*t) {
case rdf_name:
case rdf_uname:
res = wdns_len_uname(src, src + src_bytes, &len);
if (res != wdns_res_success) {
src_bytes = 0;
goto err_res;
}
wdns_domain_to_str(src, len, domain_name);
ubuf_add_cstr(u, domain_name);
ubuf_add_cstr(u, " ");
bytes_consumed(len);
break;
case rdf_bytes:
len = src_bytes;
while (len > 0) {
ubuf_add_fmt(u, "%02X", *src);
src++;
len--;
}
src_bytes = 0;
break;
case rdf_bytes_b64: {
base64_encodestate b64;
char *buf;
base64_init_encodestate(&b64);
buf = alloca(2 * src_bytes + 1);
len = base64_encode_block((const char *) src, src_bytes, buf, &b64);
ubuf_append(u, (uint8_t *) buf, len);
len = base64_encode_blockend(buf, &b64);
ubuf_append(u, (uint8_t *) buf, len);
src_bytes = 0;
break;
}
case rdf_ipv6prefix:
bytes_required(1);
len = oclen = *src++;
bytes_required(1 + oclen);
while (len > 0) {
ubuf_add_fmt(u, "%02x", *src);
src++;
len--;
}
ubuf_add_cstr(u, " ");
src_bytes -= oclen + 1;
break;
case rdf_salt:
bytes_required(1);
len = oclen = *src++;
bytes_required(1 + oclen);
if (oclen == 0)
ubuf_add_cstr(u, "-");
while (len > 0) {
ubuf_add_fmt(u, "%02x", *src);
src++;
len--;
}
ubuf_add_cstr(u, " ");
src_bytes -= oclen + 1;
break;
case rdf_hash: {
char *buf;
bytes_required(1);
oclen = *src++;
bytes_required(1 + oclen);
buf = alloca(2 * oclen + 1);
len = base32_encode(buf, 2 * oclen + 1, src, oclen);
ubuf_append(u, (uint8_t *) buf, len);
ubuf_add_cstr(u, " ");
src += oclen;
src_bytes -= oclen + 1;
break;
}
case rdf_int8: {
uint8_t val;
bytes_required(1);
memcpy(&val, src, sizeof(val));
ubuf_add_fmt(u, "%u ", val);
bytes_consumed(1);
break;
}
case rdf_int16: {
uint16_t val;
bytes_required(2);
memcpy(&val, src, sizeof(val));
val = ntohs(val);
ubuf_add_fmt(u, "%hu ", val);
bytes_consumed(2);
break;
}
case rdf_int32: {
uint32_t val;
bytes_required(4);
memcpy(&val, src, sizeof(val));
val = ntohl(val);
ubuf_add_fmt(u, "%u ", val);
bytes_consumed(4);
break;
}
case rdf_ipv4: {
char pres[WDNS_PRESLEN_TYPE_A];
bytes_required(4);
inet_ntop(AF_INET, src, pres, sizeof(pres));
ubuf_add_cstr(u, pres);
ubuf_add_cstr(u, " ");
bytes_consumed(4);
break;
}
case rdf_ipv6: {
char pres[WDNS_PRESLEN_TYPE_AAAA];
bytes_required(16);
inet_ntop(AF_INET6, src, pres, sizeof(pres));
ubuf_add_cstr(u, pres);
ubuf_add_cstr(u, " ");
bytes_consumed(16);
break;
}
case rdf_string: {
bytes_required(1);
oclen = *src;
bytes_required(1 + oclen);
len = rdata_to_str_string(src, u);
bytes_consumed(len);
break;
}
case rdf_repstring:
while (src_bytes > 0) {
bytes_required(1);
oclen = *src;
bytes_required(1 + oclen);
len = rdata_to_str_string(src, u);
bytes_consumed(len);
}
break;
case rdf_rrtype: {
const char *s_rrtype;
uint16_t my_rrtype;
bytes_required(2);
memcpy(&my_rrtype, src, 2);
my_rrtype = ntohs(my_rrtype);
bytes_consumed(2);
s_rrtype = wdns_rrtype_to_str(my_rrtype);
if (s_rrtype != NULL) {
ubuf_add_cstr(u, s_rrtype);
ubuf_add_cstr(u, " ");
} else {
ubuf_add_fmt(u, "TYPE%hu ", my_rrtype);
}
break;
}
case rdf_type_bitmap: {
const char *s_rrtype;
uint16_t my_rrtype, lo;
uint8_t a, b, window_block, bitmap_len;
bytes_required(2);
while (src_bytes >= 2) {
window_block = *src;
bitmap_len = *(src + 1);
bytes_consumed(2);
bytes_required(bitmap_len);
lo = 0;
for (int i = 0; i < bitmap_len; i++) {
a = src[i];
for (int j = 1; j <= 8; j++) {
b = a & (1 << (8 - j));
if (b != 0) {
my_rrtype = (window_block << 16) | lo;
s_rrtype = wdns_rrtype_to_str(my_rrtype);
if (s_rrtype != NULL) {
ubuf_add_cstr(u, s_rrtype);
ubuf_add_cstr(u, " ");
} else {
ubuf_add_fmt(u, "TYPE%hu ", my_rrtype);
}
}
lo += 1;
}
}
bytes_consumed(bitmap_len);
}
break;
} /* end case */
}
}
/* truncate trailing " " */
if (ubuf_size(u) > 0 && ubuf_value(u, ubuf_size(u) - 1) == ' ')
ubuf_clip(u, ubuf_size(u) - 1);
return;
err:
ubuf_add_fmt(u, " ### PARSE ERROR ###");
return;
err_res:
ubuf_add_fmt(u, " ### PARSE ERROR #%u ###", res);
return;
}
static void
init_dso(void)
{
merge_dso_path = getenv("MTBL_MERGE_DSO");
merge_dso_prefix = getenv("MTBL_MERGE_FUNC_PREFIX");
if (merge_dso_path == NULL) {
fprintf(stderr, "Error: MTBL_MERGE_DSO environment variable not set.\n\n");
usage();
}
if (merge_dso_prefix == NULL) {
fprintf(stderr, "Error: MTBL_MERGE_FUNC_PREFIX environment variable not set.\n\n");
usage();
}
dlerror();
void *handle = dlopen(merge_dso_path, RTLD_NOW);
if (handle == NULL) {
fprintf(stderr, "Error: dlopen() failed: %s\n", dlerror());
exit(EXIT_FAILURE);
}
/* merge func */
ubuf *func_name = ubuf_init(0);
ubuf_append(func_name,
(const uint8_t *) merge_dso_prefix,
strlen(merge_dso_prefix));
ubuf_append(func_name,
(const uint8_t *) "_func",
sizeof("_func"));
user_func_merge = dlsym(handle, (const char *) ubuf_data(func_name));
if (user_func_merge == NULL) {
fprintf(stderr, "Error: user merge function required but not found in DSO.\n\n");
usage();
}
/* init func */
ubuf_clip(func_name, 0);
ubuf_append(func_name,
(const uint8_t *) merge_dso_prefix,
strlen(merge_dso_prefix));
ubuf_append(func_name,
(const uint8_t *) "_init_func",
sizeof("_init_func"));
user_func_init = dlsym(handle, (const char *) ubuf_data(func_name));
if (user_func_init != NULL)
user_clos = user_func_init();
/* free func */
ubuf_clip(func_name, 0);
ubuf_append(func_name,
(const uint8_t *) merge_dso_prefix,
strlen(merge_dso_prefix));
ubuf_append(func_name,
(const uint8_t *) "_free_func",
sizeof("_free_func"));
user_func_free = dlsym(handle, (const char *) ubuf_data(func_name));
/* cleanup */
ubuf_destroy(&func_name);
}
