/* Public function for logging an entry.
* Tries to encapsulate as much of the formatting as possible to simplify the
* caller's code.
*/
enum logger_ret_type logger_log(logger *l, const enum log_entry_type event, const void *entry, ...) {
bipbuf_t *buf = l->buf;
bool nospace = false;
va_list ap;
int total = 0;
logentry *e;
const entry_details *d = &l->entry_map[event];
int reqlen = d->reqlen;
pthread_mutex_lock(&l->mutex);
/* Request a maximum length of data to write to */
e = (logentry *) bipbuf_request(buf, (sizeof(logentry) + reqlen));
if (e == NULL) {
pthread_mutex_unlock(&l->mutex);
l->dropped++;
return LOGGER_RET_NOSPACE;
}
e->gid = logger_get_gid();
e->event = d->subtype;
/* TODO: Could pass this down as an argument now that we're using
* LOGGER_LOG() macro.
*/
e->eflags = d->eflags;
/* Noting time isn't optional. A feature may be added to avoid rendering
* time and/or gid to a logger.
*/
gettimeofday(&e->tv, NULL);
switch (d->subtype) {
case LOGGER_TEXT_ENTRY:
va_start(ap, entry);
total = vsnprintf((char *) e->data, reqlen, d->format, ap);
va_end(ap);
if (total >= reqlen || total <= 0) {
fprintf(stderr, "LOGGER: Failed to vsnprintf a text entry: (total) %d\n", total);
break;
}
e->size = total + 1; /* null byte */
break;
case LOGGER_EVICTION_ENTRY:
_logger_log_evictions(e, (item *)entry);
break;
#ifdef EXTSTORE
case LOGGER_EXT_WRITE_ENTRY:
va_start(ap, entry);
int ew_bucket = va_arg(ap, int);
va_end(ap);
_logger_log_ext_write(e, (item *)entry, ew_bucket);
break;
#endif
case LOGGER_ITEM_GET_ENTRY:
va_start(ap, entry);
int was_found = va_arg(ap, int);
char *key = va_arg(ap, char *);
size_t nkey = va_arg(ap, size_t);
uint8_t gclsid = va_arg(ap, int);
_logger_log_item_get(e, was_found, key, nkey, gclsid);
va_end(ap);
break;
case LOGGER_ITEM_STORE_ENTRY:
va_start(ap, entry);
enum store_item_type status = va_arg(ap, enum store_item_type);
int comm = va_arg(ap, int);
char *skey = va_arg(ap, char *);
size_t snkey = va_arg(ap, size_t);
rel_time_t sttl = va_arg(ap, rel_time_t);
uint8_t sclsid = va_arg(ap, int);
_logger_log_item_store(e, status, comm, skey, snkey, sttl, sclsid);
break;
}
/* Push pointer forward by the actual amount required */
if (bipbuf_push(buf, (sizeof(logentry) + e->size)) == 0) {
fprintf(stderr, "LOGGER: Failed to bipbuf push a text entry\n");
pthread_mutex_unlock(&l->mutex);
return LOGGER_RET_ERR;
}
l->written++;
L_DEBUG("LOGGER: Requested %d bytes, wrote %lu bytes\n", reqlen,
(sizeof(logentry) + e->size));
pthread_mutex_unlock(&l->mutex);
if (nospace) {
return LOGGER_RET_NOSPACE;
} else {
return LOGGER_RET_OK;
}
}
static ya_result
config_main_section_postprocess(struct config_section_descriptor_s *csd)
{
u32 port = 0;
u32 cpu_per_core = (sys_has_hyperthreading())?2:1;
int ret;
char tmp[PATH_MAX];
if(FAIL(parse_u32_check_range(g_config->server_port, &port, 1, MAX_U16, 10)))
{
port = DNS_DEFAULT_PORT;
ttylog_err("config: main: wrong dns port set in main '%s', defaulted to %d", g_config->server_port, port);
}
if(g_config->hostname_chaos == NULL)
{
#if _BSD_SOURCE || _XOPEN_SOURCE >= 500 || /* Since glibc 2.12: */ _POSIX_C_SOURCE >= 200112L
if(gethostname(tmp, sizeof(tmp)) == 0)
{
g_config->hostname_chaos = strdup(tmp);
}
else
{
osformatln(termerr,"config: main: unable to get hostname: %r", ERRNO_ERROR);
g_config->hostname_chaos = strdup("not disclosed");
}
#else
g_config->hostname_chaos = strdup("not disclosed");
#endif
}
if(g_config->thread_affinity_multiplier == 0)
{
g_config->thread_affinity_multiplier = cpu_per_core;
}
class_ch_set_hostname(g_config->hostname_chaos);
class_ch_set_id_server(g_config->serverid_chaos);
class_ch_set_version(g_config->version_chaos);
host_set_default_port_value(g_config->listen, ntohs(port));
if(g_config->server_flags & SERVER_FL_CHROOT)
{
uid_t euid = geteuid();
if(euid != 0)
{
ttylog_err("config: main: chroot has been enabled but euid is not root (%i != 0)", (int)euid);
return INVALID_STATE_ERROR;
}
}
else // disables the base-path/chroot-path feature
{
if(strcmp(g_config->chroot_path, "/") != 0)
{
free(g_config->chroot_path);
g_config->chroot_path = strdup("/");
chroot_set_path(g_config->chroot_path);
}
}
message_edns0_setmaxsize(g_config->edns0_max_size);
g_config->total_interfaces = host_address_count(g_config->listen);
if(g_config->total_interfaces > MAX_INTERFACES)
{
ttylog_err("error: more than %d listening addresses defined.", MAX_INTERFACES);
return CONFIG_TOO_MANY_HOSTS;
}
#ifndef SO_REUSEPORT
if(g_config->network_model == 1)
{
ttylog_err("error: network-model 1 requires features not available on this system (SO_REUSEPORT)");
return FEATURE_NOT_SUPPORTED;
}
#endif
g_config->axfr_retry_jitter = BOUND(AXFR_RETRY_JITTER_MIN, g_config->axfr_retry_jitter, g_config->axfr_retry_delay);
g_config->dnssec_thread_count = BOUND(1, g_config->dnssec_thread_count, sys_get_cpu_count());
if(g_config->cpu_count_override > 0)
{
sys_set_cpu_count(g_config->cpu_count_override);
}
if(g_config->thread_count_by_address == 0)
{
ttylog_err("config: single thread engine has been removed, thread-count-by-address set to 1");
g_config->thread_count_by_address = 1;
}
if(g_config->thread_count_by_address < 0)
{
g_config->thread_count_by_address = MAX(sys_get_cpu_count() / cpu_per_core, 1);
}
else if((g_config->thread_count_by_address > sys_get_cpu_count()))
{
g_config->thread_count_by_address = MAX(sys_get_cpu_count() / cpu_per_core, 1);
ttylog_err("config: bounding down thread-count-by-address to the number of physical CPUs (%d)", g_config->thread_count_by_address);
}
g_config->tcp_query_min_rate_us = g_config->tcp_query_min_rate * 0.000001;
#if HAS_DNSSEC_SUPPORT
g_config->dnssec_thread_count = BOUND(1, g_config->dnssec_thread_count, sys_get_cpu_count());
if(!IS_TYPE_PRIVATE(g_config->sig_signing_type))
{
ttylog_err("error: signing type is not in the accepted range: %hx", g_config->sig_signing_type);
return CONFIG_WRONG_SIG_TYPE;
}
if(g_config->sig_validity_interval > SIGNATURE_VALIDITY_INTERVAL_MAX)
{
ttylog_err("error: signature validity interval too high");
return CONFIG_WRONG_SIG_VALIDITY;
}
if(g_config->sig_validity_regeneration * SIGNATURE_VALIDITY_REGENERATION_S * 2 > g_config->sig_validity_interval * SIGNATURE_VALIDITY_INTERVAL_S)
{
ttylog_err("error: default signature regeneration is more than half the interval (%ds * 2 > %ds)",
g_config->sig_validity_regeneration * SIGNATURE_VALIDITY_REGENERATION_S,
g_config->sig_validity_interval * SIGNATURE_VALIDITY_INTERVAL_S);
return CONFIG_WRONG_SIG_REGEN;
}
#endif
/// @note config_main_verify_and_update_directory updates the folder with the base_path
/**
*
* @note All base paths are updated with the chroot variable so it does not
* need to be added all the time.
*
*/
const char *base_path = g_config->chroot_path;
if(FAIL(ret = config_main_verify_and_update_directory(base_path, &g_config->data_path)))
{
return ret;
}
if(FAIL(ret = config_main_verify_and_update_directory(base_path, &g_config->keys_path)))
{
return ret;
}
if(FAIL(ret = config_main_verify_and_update_directory(base_path, &g_config->log_path)))
{
return ret;
}
#if 0 /* fix */
#else
if(FAIL(ret = config_main_verify_and_update_file(base_path, &g_config->pid_file)))
{
return ret;
}
#endif
g_config->reloadable = TRUE;
if((g_config->server_flags & SERVER_FL_CHROOT) != 0)
{
if(FAIL(chroot_manage_path(&g_config->config_file, g_config->config_file, FALSE)))
{
log_warn("config file '%s' will not be accessible within the chroot jail '%s' : config reload will not work", g_config->config_file, base_path);
g_config->reloadable = FALSE;
}
}
if(FAIL(ret = config_main_verify_and_update_directory(base_path, &g_config->xfr_path)))
{
return ret;
}
#if ZDB_HAS_DNSSEC_SUPPORT
dnssec_keystore_setpath(g_config->keys_path);
dnssec_set_xfr_path(g_config->xfr_path);
journal_set_xfr_path(g_config->xfr_path);
#endif
if((logger_get_uid() != g_config->uid) || (logger_get_gid() != g_config->gid))
{
logger_set_uid(g_config->uid);
logger_set_gid(g_config->gid);
logger_reopen();
}
return SUCCESS;
}
static ya_result
config_section_handles_set_wild(struct config_section_descriptor_s *csd, const char *key, const char *value)
{
if(logger_channel_get_usage_count(key) >= 0)
{
return CONFIG_LOGGER_HANDLE_ALREADY_DEFINED; // already defined
}
char value_target[PATH_MAX];
parse_copy_word(value_target, sizeof(value_target), value);
if(strcasecmp("stdout", value_target) == 0)
{
output_stream stdout_os;
fd_output_stream_attach(&stdout_os, dup_ex(1));
logger_channel *stdout_channel = logger_channel_alloc();
logger_channel_stream_open(&stdout_os, FALSE, stdout_channel);
logger_channel_register(key, stdout_channel);
}
else if(strcasecmp("stderr", value_target) == 0)
{
output_stream stderr_os;
fd_output_stream_attach(&stderr_os, dup_ex(2));
logger_channel *stderr_channel = logger_channel_alloc();
logger_channel_stream_open(&stderr_os, FALSE, stderr_channel);
logger_channel_register(key, stderr_channel);
}
else if(strcasecmp("syslog", value_target) == 0)
{
char* token;
/*
* Tokenize
*/
u32 options = 0;
u32 facility = 0;
/* WARNING: NEVER EVER USE A CONST STRING AS ARGUMENT OR strtok WILL SIGSEGV */
char *tmp_value = strdup(value); // value, not value_target
for(token = strtok(tmp_value, SYSLOG_CHANNEL_TOKEN_DELIMITER);
token != NULL;
token = strtok(NULL, SYSLOG_CHANNEL_TOKEN_DELIMITER))
{
u32 token_value;
if(ISOK(get_value_from_casename(syslog_channel_arguments_options, token, &token_value)))
{
options |= token_value;
}
else if(ISOK(get_value_from_casename(syslog_channel_arguments_facility, token, &token_value)))
{
facility = token_value; // Facility is NOT a bit mask
}
else
{
/* Note: empty statement is taken care of here */
osformatln(termerr, "wrong syslog argument '%s' : ", csd->vtbl->name);
free(tmp_value);
return PARSE_INVALID_ARGUMENT;
}
}
free(tmp_value);
logger_channel *syslog_channel = logger_channel_alloc();
logger_channel_syslog_open(key, options, facility, syslog_channel);
logger_channel_register(key, syslog_channel);
}
else
{
const char *chroot_base = chroot_get_path();
uid_t uid = logger_get_uid();
gid_t gid = logger_get_gid();
ya_result return_code;
unsigned int access_rights;
char fullpath[PATH_MAX];
// find the end of the word
// cut it
const char *path_limit = parse_next_blank(value);
size_t path_len = path_limit - value;
size_t pathbase_len;
if(value[0] != '/')
{
pathbase_len = snformat(fullpath, sizeof(fullpath), "%s%s", chroot_base, log_path);
}
else
{
pathbase_len = snformat(fullpath, sizeof(fullpath), "%s", chroot_base);
}
if(pathbase_len + path_len + 1 >= sizeof(fullpath))
{
return CONFIG_FILE_PATH_TOO_BIG;
}
memcpy(&fullpath[pathbase_len], value, path_len);
path_len += pathbase_len;
fullpath[path_len] = '\0';
// parse the next word, it is supposed to be an octal number
if(sscanf(path_limit, "%o", &access_rights) != 1)
{
access_rights = FILE_CHANNEL_DEFAULT_ACCESS_RIGHTS;
}
// if the path starts with a slash, it's absolute, else it's relative
// to the log directory
logger_channel* file_channel = logger_channel_alloc();
if(FAIL(return_code = logger_channel_file_open(fullpath, uid, gid, access_rights, FALSE, file_channel)))
{
osformatln(termerr, "config: unable to open file channel '%s' (%d:%d %o) : %r", fullpath, uid, gid, access_rights, return_code);
flusherr();
return return_code;
}
logger_channel_register(key, file_channel);
}
return SUCCESS;
}