F_NONNULL
static dc_t* config_res_perdc(const unsigned mapnum, const vscf_data_t* cfg, const char* resname) {
dmn_assert(cfg); dmn_assert(resname);
dmn_assert(vscf_is_hash(cfg));
const unsigned num_dcs = vscf_hash_get_len(cfg);
dc_t* store = calloc((num_dcs + 1), sizeof(dc_t));
for(unsigned i = 0; i < num_dcs; i++) {
const char* dcname = vscf_hash_get_key_byindex(cfg, i, NULL);
const unsigned dc_idx = map_get_dcidx(mapnum, dcname);
if(!dc_idx)
log_fatal("plugin_" PNSTR ": resource '%s': datacenter name '%s' is not valid", resname, dcname);
dmn_assert(dc_idx <= num_dcs);
dc_t* this_dc = &store[dc_idx];
this_dc->dc_name = strdup(dcname);
const vscf_data_t* plugdata = vscf_hash_get_data_byindex(cfg, i);
if(vscf_is_simple(plugdata)) {
const char* textdata = vscf_simple_get_data(plugdata);
if(*textdata == '%') {
char* child_plugname = strdup(textdata + 1);
this_dc->plugin_name = child_plugname;
char* child_resname = strchr(child_plugname, '!');
if(child_resname) {
*child_resname++ = '\0';
this_dc->res_name = strdup(child_resname);
}
if(!strcmp(this_dc->plugin_name, PNSTR) && !strcmp(this_dc->res_name, resname))
log_fatal("plugin_" PNSTR ": resource '%s': not allowed to reference itself!", resname);
}
else if(*textdata == '!') {
this_dc->res_name = strdup(textdata + 1);
const vscf_data_t* res_cfg = vscf_get_parent(cfg);
this_dc->plugin_name = get_defaulted_plugname(res_cfg, resname, dcname);
if(!strcmp(this_dc->plugin_name, PNSTR) && !strcmp(this_dc->res_name, resname))
log_fatal("plugin_" PNSTR ": resource '%s': not allowed to reference itself!", resname);
}
else {
anysin_t tempsin;
if(gdnsd_anysin_getaddrinfo(textdata, NULL, &tempsin)) {
// failed to parse as address, so set up direct CNAME if possible
uint8_t* dname = malloc(256);
dname_status_t dnstat = vscf_simple_get_as_dname(plugdata, dname);
if(dnstat == DNAME_INVALID)
log_fatal("plugin_" PNSTR ": resource '%s': CNAME for datacenter '%s' is not a legal domainname", resname, dcname);
if(dnstat == DNAME_VALID)
dname = dname_trim(dname);
this_dc->dname = dname;
}
else {
inject_child_plugin_config(this_dc, resname, (vscf_data_t*)plugdata);
}
}
}
else {
inject_child_plugin_config(this_dc, resname, (vscf_data_t*)plugdata);
}
}
return store;
}
F_NONNULL
static void config_addrset(const char* res_name, const char* stanza, const bool ipv6, addrset_t* addrset, const vscf_data_t* cfg) {
dmn_assert(res_name); dmn_assert(stanza); dmn_assert(addrset); dmn_assert(cfg);
if(!vscf_is_hash(cfg))
log_fatal("plugin_weighted: resource '%s' stanza '%s' value must be a hash", res_name, stanza);
const vscf_data_t* parent = vscf_get_parent(cfg);
// inherit down the applicable res-level parameters
vscf_hash_inherit(parent, (vscf_data_t*)cfg, "service_types", true);
vscf_hash_inherit(parent, (vscf_data_t*)cfg, "multi", true);
vscf_hash_inherit(parent, (vscf_data_t*)cfg, "up_thresh", true);
// Get a starting assumption of our item count
addrset->count = vscf_hash_get_len(cfg);
/////// Process the parameters...
// service_types
const vscf_data_t* res_stypes = vscf_hash_get_data_byconstkey(cfg, "service_types", true);
if (res_stypes) {
addrset->count--; // minus one for service_types entry
addrset->num_svcs = vscf_array_get_len(res_stypes);
if(!addrset->num_svcs)
log_fatal("plugin_weighted: resource '%s' (%s): service_types cannot be an empty array", res_name, stanza);
addrset->svc_names = malloc(addrset->num_svcs * sizeof(char*));
for(unsigned i = 0; i < addrset->num_svcs; i++) {
const vscf_data_t* this_svc_cfg = vscf_array_get_data(res_stypes, i);
if(!vscf_is_simple(this_svc_cfg))
log_fatal("plugin_weighted: resource '%s' (%s): service_types values must be strings", res_name, stanza);
addrset->svc_names[i] = strdup(vscf_simple_get_data(this_svc_cfg));
}
}
else {
addrset->num_svcs = 1;
addrset->svc_names = malloc(sizeof(char*));
addrset->svc_names[0] = strdup("default");
}
// multi option
addrset->multi = false;
const vscf_data_t* multi_cfg = vscf_hash_get_data_byconstkey(cfg, "multi", true);
if(multi_cfg) {
addrset->count--; // minus one for multi entry
if(!vscf_is_simple(multi_cfg) || !vscf_simple_get_as_bool(multi_cfg, &addrset->multi))
log_fatal("plugin_weighted: resource '%s' (%s): 'multi' must be a boolean value ('true' or 'false')", res_name, stanza);
}
// up threshold as double
double up_thresh = 0.5;
const vscf_data_t* thresh_cfg = vscf_hash_get_data_byconstkey(cfg, "up_thresh", true);
if(thresh_cfg) {
addrset->count--; // minus one for up_thresh entry
if(!vscf_is_simple(thresh_cfg) || !vscf_simple_get_as_double(thresh_cfg, &up_thresh)
|| up_thresh <= 0.0 || up_thresh > 1.0)
log_fatal("plugin_weighted: resource '%s' (%s): 'up_thresh' must be a floating point value in the range (0.0 - 1.0]", res_name, stanza);
}
if(addrset->count > MAX_ITEMS_PER_SET)
log_fatal("plugin_weighted: resource '%s' (%s): number of direct groups or addrs within one family cannot be more than %u", res_name, stanza, MAX_ITEMS_PER_SET);
if(!addrset->count)
log_fatal("plugin_weighted: resource '%s' (%s): empty address-family sets not allowed", res_name, stanza);
// track maximum res-size actually configured
if(cfg_max_items_per_res < addrset->count)
cfg_max_items_per_res = addrset->count;
addrset->items = calloc(addrset->count, sizeof(res_aitem_t));
addrset->gmode = RES_ASET_UNKNOWN;
addr_iter_data_t aid = {
.item_idx = 0,
.addrset = addrset,
.res_name = res_name,
.stanza = stanza,
.ipv6 = ipv6
};
vscf_hash_iterate(cfg, true, config_addrset_item, &aid);
addrset->weight = 0;
addrset->max_weight = 0;
for(unsigned i = 0; i < addrset->count; i++) {
const unsigned iwt = addrset->items[i].weight;
dmn_assert(iwt); dmn_assert(addrset->items[i].max_weight);
addrset->weight += iwt;
if(addrset->max_weight < iwt)
addrset->max_weight = iwt;
}
dmn_assert(addrset->weight);
dmn_assert(addrset->max_weight);
addrset->up_weight = ceil(up_thresh * addrset->weight);
dmn_assert(addrset->up_weight);
}
typedef struct {
cnset_t* cnset;
const char* res_name;
const char* stanza;
unsigned item_idx;
} cname_iter_data_t;
F_NONNULL
static bool config_item_cname(const char* item_name, unsigned klen V_UNUSED, const vscf_data_t* cfg_data, void* cid_asvoid) {
dmn_assert(item_name); dmn_assert(cfg_data); dmn_assert(cid_asvoid);
cname_iter_data_t* cid = (cname_iter_data_t*)cid_asvoid;
cnset_t* cnset = cid->cnset;
const char* res_name = cid->res_name;
const char* stanza = cid->stanza;
const unsigned item_idx = cid->item_idx++;
res_citem_t* res_item = &cnset->items[item_idx];
long wtemp = 0;
if(!vscf_is_array(cfg_data)
|| (2 != vscf_array_get_len(cfg_data))
|| !vscf_is_simple(vscf_array_get_data(cfg_data, 0))
|| !vscf_is_simple(vscf_array_get_data(cfg_data, 1))
|| !vscf_simple_get_as_long(vscf_array_get_data(cfg_data, 1), &wtemp)
|| wtemp < 1 || wtemp > MAX_WEIGHT )
log_fatal("plugin_weighted: resource '%s' (%s), item '%s': values in cname mode must be arrays of [ CNAME, WEIGHT ], where weight must be an integer in the range 1 - " MAX_WEIGHT_STR, res_name, stanza, item_name);
res_item->weight = wtemp;
uint8_t* dname = malloc(256);
dname_status_t dnstat = vscf_simple_get_as_dname(vscf_array_get_data(cfg_data, 0), dname);
if(dnstat == DNAME_INVALID)
log_fatal("plugin_weighted: resource '%s' (%s), item '%s': '%s' is not a legal domainname", res_name, stanza, item_name, vscf_simple_get_data(vscf_array_get_data(cfg_data, 0)));
if(dnstat == DNAME_VALID)
dname = dname_trim(dname);
res_item->cname = dname;
log_debug("plugin_weighted: resource '%s' (%s), item '%s', CNAME '%s' added with weight %u", res_name, stanza, item_name, logf_dname(dname), res_item->weight);
return true;
}
F_NONNULL
static void inject_child_plugin_config(dc_t* this_dc, const char* resname, vscf_data_t* cfg) {
dmn_assert(this_dc); dmn_assert(resname); dmn_assert(cfg);
char* child_resname = make_synth_resname(resname, this_dc->dc_name);
this_dc->res_name = child_resname;
// Move up 2 layers: dcX -> dcmap -> resX
vscf_data_t* res_cfg = (vscf_data_t*)cfg;
for(unsigned i = 0; i < 2; i++) {
res_cfg = (vscf_data_t*)vscf_get_parent(res_cfg);
dmn_assert(res_cfg);
}
// Move up 3 more layers:
// resX -> resources -> metafo|geoip -> plugins
vscf_data_t* plugins_top = res_cfg;
for(unsigned i = 0; i < 3; i++) {
plugins_top = (vscf_data_t*)vscf_get_parent(plugins_top);
dmn_assert(plugins_top);
}
// synth multifo stanza for: dc1 => 192.0.2.1, or dc1 => [ 192.0.2.1, ... ]
bool cfg_synthed = false;
if(!vscf_is_hash(cfg)) { // synthesize a hash for multifo for single/array
vscf_data_t* newhash = vscf_hash_new();
vscf_data_t* plugname_cfg = vscf_simple_new("multifo", 7);
vscf_hash_add_val("plugin", 6, newhash, plugname_cfg);
const unsigned alen = vscf_array_get_len(cfg);
for(unsigned i = 0; i < alen; i++) {
const vscf_data_t* this_addr_cfg = vscf_array_get_data(cfg, i);
if(!vscf_is_simple(this_addr_cfg))
log_fatal("plugin_" PNSTR ": resource '%s': datacenter '%s': if defined as an array, array values must all be address strings", resname, this_dc->dc_name);
const unsigned lnum = i + 1;
char lbuf[12];
snprintf(lbuf, 12, "%u", lnum);
vscf_hash_add_val(lbuf, strlen(lbuf), newhash, vscf_clone(this_addr_cfg, false));
}
cfg_synthed = true;
cfg = newhash;
}
// inherit resource-level stuff down to dc-level
vscf_hash_inherit_all(res_cfg, cfg, true);
this_dc->plugin_name = get_defaulted_plugname(cfg, resname, this_dc->dc_name);
if(!strcmp(this_dc->plugin_name, PNSTR))
log_fatal("plugin_" PNSTR ": resource '%s': datacenter '%s': plugin_" PNSTR " cannot synthesize config for itself...", resname, this_dc->dc_name);
// Create top-level plugins => { foo => {} } if necc
vscf_data_t* plug_cfg = (vscf_data_t*)vscf_hash_get_data_bystringkey(plugins_top, this_dc->plugin_name, false);
if(!plug_cfg) {
plug_cfg = vscf_hash_new();
vscf_hash_add_val(this_dc->plugin_name, strlen(this_dc->plugin_name), plugins_top, plug_cfg);
}
// special-case for geoip -> metafo synthesis, use resources sub-stanza
if(!strcmp(this_dc->plugin_name, "metafo")) {
vscf_data_t* synth_res_cfg = (vscf_data_t*)vscf_hash_get_data_byconstkey(plug_cfg, "resources", false);
if(!synth_res_cfg) {
synth_res_cfg = vscf_hash_new();
vscf_hash_add_val("resources", strlen("resources"), plug_cfg, synth_res_cfg);
}
plug_cfg = synth_res_cfg; // for below
}
// Check if resource already exists
if(vscf_hash_get_data_bystringkey(plug_cfg, child_resname, false))
log_fatal("plugin_" PNSTR ": resource '%s': datacenter '%s': synthesis of resource '%s' for plugin '%s' failed (resource name already exists)", resname, this_dc->dc_name, child_resname, this_dc->plugin_name);
// Add it, using clone() to skip marked key "plugin"
vscf_hash_add_val(child_resname, strlen(child_resname), plug_cfg, vscf_clone(cfg, true));
// destroy clone source if synthesized and disconnected from real config tree
if(cfg_synthed) vscf_destroy(cfg);
}