static int set_servers (struct global *g)
{
int ret = 0;
// count servers
size_t num_entries = count_entries(g);
// allocate sort array
struct dns_sort_entry *sort_entries = BAllocArray(num_entries, sizeof(sort_entries[0]));
if (!sort_entries) {
goto fail0;
}
// fill sort array
num_entries = 0;
for (LinkedList1Node *n = LinkedList1_GetFirst(&g->instances); n; n = LinkedList1Node_Next(n)) {
struct instance *o = UPPER_OBJECT(n, struct instance, instances_node);
for (LinkedList1Node *en = LinkedList1_GetFirst(&o->entries); en; en = LinkedList1Node_Next(en)) {
struct dns_entry *e = UPPER_OBJECT(en, struct dns_entry, list_node);
sort_entries[num_entries].line = e->line;
sort_entries[num_entries].priority= e->priority;
num_entries++;
}
}
// sort by priority
// use a custom insertion sort instead of qsort() because we want a stable sort
struct dns_sort_entry temp;
BInsertionSort(sort_entries, num_entries, sizeof(sort_entries[0]), dns_sort_comparator, &temp);
ExpString estr;
if (!ExpString_Init(&estr)) {
goto fail1;
}
for (size_t i = 0; i < num_entries; i++) {
if (!ExpString_Append(&estr, sort_entries[i].line)) {
goto fail2;
}
}
// set servers
if (!NCDIfConfig_set_resolv_conf(ExpString_Get(&estr), ExpString_Length(&estr))) {
goto fail2;
}
ret = 1;
fail2:
ExpString_Free(&estr);
fail1:
BFree(sort_entries);
fail0:
return ret;
}
static void func_new (NCDModuleInst *i)
{
// allocate instance
struct instance *o = malloc(sizeof(*o));
if (!o) {
ModuleLog(i, BLOG_ERROR, "failed to allocate instance");
goto fail0;
}
NCDModuleInst_Backend_SetUser(i, o);
// init arguments
o->i = i;
// init string
ExpString s;
if (!ExpString_Init(&s)) {
ModuleLog(i, BLOG_ERROR, "ExpString_Init failed");
goto fail1;
}
// append arguments
NCDValue *arg = NCDValue_ListFirst(o->i->args);
while (arg) {
if (NCDValue_Type(arg) != NCDVALUE_STRING) {
ModuleLog(i, BLOG_ERROR, "wrong type");
goto fail2;
}
if (!ExpString_Append(&s, NCDValue_StringValue(arg))) {
ModuleLog(i, BLOG_ERROR, "ExpString_Append failed");
goto fail2;
}
arg = NCDValue_ListNext(o->i->args, arg);
}
// set string
o->string = ExpString_Get(&s);
// signal up
NCDModuleInst_Backend_Up(o->i);
return;
fail2:
ExpString_Free(&s);
fail1:
free(o);
fail0:
NCDModuleInst_Backend_SetError(i);
NCDModuleInst_Backend_Dead(i);
}
static void print_value (NCDValue *v, unsigned int indent)
{
ExpString estr;
if (!ExpString_Init(&estr)) {
DEBUG("ExpString_Init failed");
exit(1);
}
if (!generate_val(v, &estr)) {
DEBUG("generate_val failed");
exit(1);
}
print_indent(indent);
printf("%s\n", ExpString_Get(&estr));
ExpString_Free(&estr);
}
static void func_new (void *vo, NCDModuleInst *i, const struct NCDModuleInst_new_params *params)
{
struct instance *o = vo;
o->i = i;
// read arguments
NCDValRef glue_arg;
NCDValRef pieces_arg;
if (!NCDVal_ListRead(params->args, 2, &glue_arg, &pieces_arg)) {
ModuleLog(i, BLOG_ERROR, "wrong arity");
goto fail0;
}
if (!NCDVal_IsString(glue_arg) || !NCDVal_IsList(pieces_arg)) {
ModuleLog(i, BLOG_ERROR, "wrong type");
goto fail0;
}
// init result string
ExpString str;
if (!ExpString_Init(&str)) {
ModuleLog(i, BLOG_ERROR, "ExpString_Init failed");
goto fail0;
}
size_t count = NCDVal_ListCount(pieces_arg);
for (size_t j = 0; j < count; j++) {
NCDValRef piece = NCDVal_ListGet(pieces_arg, j);
// check piece type
if (!NCDVal_IsString(piece)) {
ModuleLog(i, BLOG_ERROR, "wrong piece type");
goto fail1;
}
// append glue
if (j > 0) {
if (!ExpString_AppendBinary(&str, (const uint8_t *)NCDVal_StringData(glue_arg), NCDVal_StringLength(glue_arg))) {
ModuleLog(i, BLOG_ERROR, "ExpString_AppendBinary failed");
goto fail1;
}
}
// append piece
if (!ExpString_AppendBinary(&str, (const uint8_t *)NCDVal_StringData(piece), NCDVal_StringLength(piece))) {
ModuleLog(i, BLOG_ERROR, "ExpString_AppendBinary failed");
goto fail1;
}
}
// store result
o->result = ExpString_Get(&str);
o->result_len = ExpString_Length(&str);
// signal up
NCDModuleInst_Backend_Up(i);
return;
fail1:
ExpString_Free(&str);
fail0:
NCDModuleInst_Backend_DeadError(i);
}
void NCDConfigTokenizer_Tokenize (char *str, size_t left, NCDConfigTokenizer_output output, void *user)
{
size_t line = 1;
size_t line_char = 1;
while (left > 0) {
size_t l;
int error = 0;
int token;
void *token_val = NULL;
size_t token_len = 0;
if (*str == '#') {
l = 1;
while (l < left && str[l] != '\n') {
l++;
}
token = 0;
}
else if (l = data_begins_with(str, left, "{")) {
token = NCD_TOKEN_CURLY_OPEN;
}
else if (l = data_begins_with(str, left, "}")) {
token = NCD_TOKEN_CURLY_CLOSE;
}
else if (l = data_begins_with(str, left, "(")) {
token = NCD_TOKEN_ROUND_OPEN;
}
else if (l = data_begins_with(str, left, ")")) {
token = NCD_TOKEN_ROUND_CLOSE;
}
else if (l = data_begins_with(str, left, ";")) {
token = NCD_TOKEN_SEMICOLON;
}
else if (l = data_begins_with(str, left, ".")) {
token = NCD_TOKEN_DOT;
}
else if (l = data_begins_with(str, left, ",")) {
token = NCD_TOKEN_COMMA;
}
else if (l = data_begins_with(str, left, ":")) {
token = NCD_TOKEN_COLON;
}
else if (l = data_begins_with(str, left, "[")) {
token = NCD_TOKEN_BRACKET_OPEN;
}
else if (l = data_begins_with(str, left, "]")) {
token = NCD_TOKEN_BRACKET_CLOSE;
}
else if (l = data_begins_with(str, left, "->")) {
token = NCD_TOKEN_ARROW;
}
else if (l = data_begins_with(str, left, "If")) {
token = NCD_TOKEN_IF;
}
else if (l = data_begins_with(str, left, "Elif")) {
token = NCD_TOKEN_ELIF;
}
else if (l = data_begins_with(str, left, "elif")) {
token = NCD_TOKEN_ELIF;
}
else if (l = data_begins_with(str, left, "Else")) {
token = NCD_TOKEN_ELSE;
}
else if (l = data_begins_with(str, left, "else")) {
token = NCD_TOKEN_ELSE;
}
else if (l = data_begins_with(str, left, "Foreach")) {
token = NCD_TOKEN_FOREACH;
}
else if (l = data_begins_with(str, left, "As")) {
token = NCD_TOKEN_AS;
}
else if (l = data_begins_with(str, left, "include_guard")) {
token = NCD_TOKEN_INCLUDE_GUARD;
}
else if (l = data_begins_with(str, left, "include")) {
token = NCD_TOKEN_INCLUDE;
}
else if (is_name_first_char(*str)) {
l = 1;
while (l < left && is_name_char(str[l])) {
l++;
}
// allocate buffer
bsize_t bufsize = bsize_add(bsize_fromsize(l), bsize_fromint(1));
char *buf;
if (bufsize.is_overflow || !(buf = malloc(bufsize.value))) {
BLog(BLOG_ERROR, "malloc failed");
error = 1;
goto out;
}
// copy and terminate
memcpy(buf, str, l);
buf[l] = '\0';
if (!strcmp(buf, "process")) {
token = NCD_TOKEN_PROCESS;
free(buf);
}
else if (!strcmp(buf, "template")) {
token = NCD_TOKEN_TEMPLATE;
free(buf);
}
else {
token = NCD_TOKEN_NAME;
token_val = buf;
token_len = l;
}
}
else if (*str == '"') do {
// init string
ExpString estr;
if (!ExpString_Init(&estr)) {
BLog(BLOG_ERROR, "ExpString_Init failed");
goto string_fail0;
}
// skip start quote
l = 1;
// decode string
while (l < left) {
uint8_t dec_ch;
// get character
if (str[l] == '\\') {
if (left - l < 2) {
BLog(BLOG_ERROR, "escape character found in string but nothing follows");
goto string_fail1;
}
size_t extra = 0;
switch (str[l + 1]) {
case '\'':
case '\"':
case '\\':
case '\?':
dec_ch = str[l + 1]; break;
case 'a':
dec_ch = '\a'; break;
case 'b':
dec_ch = '\b'; break;
case 'f':
dec_ch = '\f'; break;
case 'n':
dec_ch = '\n'; break;
case 'r':
dec_ch = '\r'; break;
case 't':
dec_ch = '\t'; break;
case 'v':
dec_ch = '\v'; break;
case '0':
dec_ch = 0; break;
case 'x': {
if (left - l < 4) {
BLog(BLOG_ERROR, "hexadecimal escape found in string but too little characters follow");
goto string_fail1;
}
uintmax_t hex_val;
if (!parse_unsigned_hex_integer_bin(&str[l + 2], 2, &hex_val)) {
BLog(BLOG_ERROR, "hexadecimal escape found in string but two hex characters don't follow");
goto string_fail1;
}
dec_ch = hex_val;
extra = 2;
} break;
default:
BLog(BLOG_ERROR, "bad escape sequence in string");
goto string_fail1;
}
l += 2 + extra;
}
else if (str[l] == '"') {
break;
}
else {
dec_ch = str[l];
l++;
}
// append character to string
if (!ExpString_AppendByte(&estr, dec_ch)) {
BLog(BLOG_ERROR, "ExpString_AppendChar failed");
goto string_fail1;
}
}
// make sure ending quote was found
if (l == left) {
BLog(BLOG_ERROR, "missing ending quote for string");
goto string_fail1;
}
// skip ending quote
l++;
token = NCD_TOKEN_STRING;
token_val = ExpString_Get(&estr);
token_len = ExpString_Length(&estr);
break;
string_fail1:
ExpString_Free(&estr);
string_fail0:
error = 1;
} while (0);
else if (is_space_char(*str)) {
token = 0;
l = 1;
}
else {
BLog(BLOG_ERROR, "unrecognized character");
error = 1;
}
out:
// report error
if (error) {
output(user, NCD_ERROR, NULL, 0, line, line_char);
return;
}
// output token
if (token) {
if (!output(user, token, token_val, token_len, line, line_char)) {
return;
}
}
// update line/char counters
for (size_t i = 0; i < l; i++) {
if (str[i] == '\n') {
line++;
line_char = 1;
} else {
line_char++;
}
}
str += l;
left -= l;
}
output(user, NCD_EOF, NULL, 0, line, line_char);
}
void NCDConfigTokenizer_Tokenize (char *str, size_t left, NCDConfigTokenizer_output output, void *user)
{
size_t line = 1;
size_t line_char = 1;
while (left > 0) {
size_t l;
int error = 0;
int token;
void *token_val = NULL;
if (*str == '#') {
l = 1;
while (l < left && str[l] != '\n') {
l++;
}
token = 0;
}
else if (l = data_begins_with(str, left, "{")) {
token = NCD_TOKEN_CURLY_OPEN;
}
else if (l = data_begins_with(str, left, "}")) {
token = NCD_TOKEN_CURLY_CLOSE;
}
else if (l = data_begins_with(str, left, "(")) {
token = NCD_TOKEN_ROUND_OPEN;
}
else if (l = data_begins_with(str, left, ")")) {
token = NCD_TOKEN_ROUND_CLOSE;
}
else if (l = data_begins_with(str, left, ";")) {
token = NCD_TOKEN_SEMICOLON;
}
else if (l = data_begins_with(str, left, ".")) {
token = NCD_TOKEN_DOT;
}
else if (l = data_begins_with(str, left, ",")) {
token = NCD_TOKEN_COMMA;
}
else if (l = data_begins_with(str, left, ":")) {
token = NCD_TOKEN_COLON;
}
else if (l = data_begins_with(str, left, "[")) {
token = NCD_TOKEN_BRACKET_OPEN;
}
else if (l = data_begins_with(str, left, "]")) {
token = NCD_TOKEN_BRACKET_CLOSE;
}
else if (l = data_begins_with(str, left, "->")) {
token = NCD_TOKEN_ARROW;
}
else if (is_name_first_char(*str)) {
l = 1;
while (l < left && is_name_char(str[l])) {
l++;
}
// allocate buffer
bsize_t bufsize = bsize_add(bsize_fromsize(l), bsize_fromint(1));
char *buf;
if (bufsize.is_overflow || !(buf = malloc(bufsize.value))) {
BLog(BLOG_ERROR, "malloc failed");
error = 1;
goto out;
}
// copy and terminate
memcpy(buf, str, l);
buf[l] = '\0';
if (!strcmp(buf, "process")) {
token = NCD_TOKEN_PROCESS;
free(buf);
}
else if (!strcmp(buf, "template")) {
token = NCD_TOKEN_TEMPLATE;
free(buf);
}
else {
token = NCD_TOKEN_NAME;
token_val = buf;
}
}
else if (*str == '"') do {
// init string
ExpString estr;
if (!ExpString_Init(&estr)) {
BLog(BLOG_ERROR, "ExpString_Init failed");
goto string_fail0;
}
// skip start quote
l = 1;
// decode string
while (l < left) {
char dec_ch;
// get character
if (str[l] == '\\') {
if (left - l < 2) {
BLog(BLOG_ERROR, "escape character found in string but nothing follows");
goto string_fail1;
}
dec_ch = str[l + 1];
l += 2;
}
else if (str[l] == '"') {
break;
}
else {
dec_ch = str[l];
l++;
}
// string cannot contain zeros bytes
if (dec_ch == '\0') {
BLog(BLOG_ERROR, "string contains zero byte");
goto string_fail1;
}
// append character to string
if (!ExpString_AppendChar(&estr, dec_ch)) {
BLog(BLOG_ERROR, "ExpString_AppendChar failed");
goto string_fail1;
}
}
// make sure ending quote was found
if (l == left) {
BLog(BLOG_ERROR, "missing ending quote for string");
goto string_fail1;
}
// skip ending quote
l++;
token = NCD_TOKEN_STRING;
token_val = ExpString_Get(&estr);
break;
string_fail1:
ExpString_Free(&estr);
string_fail0:
error = 1;
} while (0);
else if (is_space_char(*str)) {
token = 0;
l = 1;
}
else {
BLog(BLOG_ERROR, "unrecognized character");
error = 1;
}
out:
// report error
if (error) {
output(user, NCD_ERROR, NULL, line, line_char);
return;
}
// output token
if (token) {
if (!output(user, token, token_val, line, line_char)) {
return;
}
}
// update line/char counters
for (size_t i = 0; i < l; i++) {
if (str[i] == '\n') {
line++;
line_char = 1;
} else {
line_char++;
}
}
str += l;
left -= l;
}
output(user, NCD_EOF, NULL, line, line_char);
}
