F_NONNULL
static bool config_addr_group_addr(const char* lb_name, const unsigned lb_name_len, const vscf_data_t* lb_data, void* iaga_asvoid) {
dmn_assert(lb_name); dmn_assert(lb_name_len); dmn_assert(lb_data); dmn_assert(iaga_asvoid);
iaga_t* iaga = (iaga_t*)iaga_asvoid;
addrset_t* addrset = iaga->addrset;
res_aitem_t* res_item = iaga->res_item;
unsigned lb_idx = iaga->lb_idx++;
const char* res_name = iaga->res_name;
const char* stanza = iaga->stanza;
const char* item_name = iaga->item_name;
const bool ipv6 = iaga->ipv6;
const unsigned res_name_len = strlen(res_name);
const unsigned item_name_len = strlen(item_name);
long lb_weight = 0;
if(!vscf_is_array(lb_data)
|| (2 != vscf_array_get_len(lb_data))
|| !vscf_is_simple(vscf_array_get_data(lb_data, 0))
|| !vscf_is_simple(vscf_array_get_data(lb_data, 1))
|| !vscf_simple_get_as_long(vscf_array_get_data(lb_data, 1), &lb_weight)
|| lb_weight < 1 || lb_weight > MAX_WEIGHT )
log_fatal("plugin_weighted: resource '%s', group '%s': values in address group mode must be arrays of [ IPADDR, WEIGHT ], where weight must be an integer in the range 1 - " MAX_WEIGHT_STR, res_name, item_name);
res_item->as[lb_idx].states = calloc(addrset->num_svcs, sizeof(mon_state_t));
res_item->as[lb_idx].weight = lb_weight;
const char* addr_txt = vscf_simple_get_data(vscf_array_get_data(lb_data, 0));
int addr_err = gdnsd_anysin_getaddrinfo(addr_txt, NULL, &res_item->as[lb_idx].addr);
if(addr_err)
log_fatal("plugin_weighted: resource '%s', group '%s', addr '%s': parsing '%s' as an IP address failed: %s", res_name, item_name, lb_name, addr_txt, gai_strerror(addr_err));
if(ipv6 && res_item->as[lb_idx].addr.sa.sa_family != AF_INET6)
log_fatal("plugin_weighted: resource '%s' (%s): item '%s': '%s' is IPv4, was expecting IPv6", res_name, stanza, item_name, addr_txt);
else if(!ipv6 && res_item->as[lb_idx].addr.sa.sa_family != AF_INET)
log_fatal("plugin_weighted: resource '%s' (%s): item '%s': '%s' is IPv6, was expecting IPv4", res_name, stanza, item_name, addr_txt);
for(unsigned i = 0; i < addrset->num_svcs; i++) {
const unsigned svc_name_len = strlen(addrset->svc_names[i]);
char *complete_desc = malloc(res_name_len + 1 + 4 + 1 + item_name_len + 1 + lb_name_len + 1 + svc_name_len + 1);
sprintf(complete_desc, "%s/%s/%s/%s/%s", res_name, ipv6 ? "ipv6" : "ipv4", item_name, lb_name, addrset->svc_names[i]);
mon_list.info = realloc(mon_list.info, sizeof(mon_info_t) * (mon_list.count + 1));
mon_info_t* m = &mon_list.info[mon_list.count++];
m->svctype = addrset->svc_names[i];
m->desc = complete_desc;
m->addr = addr_txt;
m->state_ptr = &res_item->as[lb_idx].states[i];
}
log_debug("plugin_weighted: resource '%s' (%s), item '%s', address %s added with weight %u", res_name, stanza, item_name, addr_txt, res_item->as[lb_idx].weight);
return true;
}
F_NONNULL
static void config_item_addrs(res_aitem_t* res_item, const char* res_name, const char* stanza, const char* item_name, const bool ipv6, const vscf_data_t* cfg_data, addrset_t* addrset) {
dmn_assert(res_name); dmn_assert(stanza); dmn_assert(item_name);
dmn_assert(res_item); dmn_assert(cfg_data); dmn_assert(addrset);
const unsigned res_name_len = strlen(res_name);
const unsigned item_name_len = strlen(item_name);
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 addrs mode must be arrays of [ IPADDR, WEIGHT ], where weight must be an integer in the range 1 - " MAX_WEIGHT_STR, res_name, stanza, item_name);
res_item->count = 1;
res_item->as = calloc(res_item->count, sizeof(addrstate_t));
res_item->as[0].states = calloc(addrset->num_svcs, sizeof(mon_state_t));
res_item->as[0].weight = wtemp;
res_item->max_weight = wtemp;
res_item->weight = wtemp;
const char* addr_txt = vscf_simple_get_data(vscf_array_get_data(cfg_data, 0));
int addr_err = gdnsd_anysin_getaddrinfo(addr_txt, NULL, &res_item->as[0].addr);
if(addr_err)
log_fatal("plugin_weighted: resource '%s' (%s): item '%s': parsing '%s' as an IP address failed: %s", res_name, stanza, item_name, addr_txt, gai_strerror(addr_err));
if(ipv6 && res_item->as[0].addr.sa.sa_family != AF_INET6)
log_fatal("plugin_weighted: resource '%s' (%s): item '%s': '%s' is IPv4, was expecting IPv6", res_name, stanza, item_name, addr_txt);
else if(!ipv6 && res_item->as[0].addr.sa.sa_family != AF_INET)
log_fatal("plugin_weighted: resource '%s' (%s): item '%s': '%s' is IPv6, was expecting IPv4", res_name, stanza, item_name, addr_txt);
for(unsigned i = 0; i < addrset->num_svcs; i++) {
const unsigned svc_name_len = strlen(addrset->svc_names[i]);
char *complete_desc = malloc(res_name_len + 1 + 4 + 1 + item_name_len + 1 + svc_name_len + 1);
sprintf(complete_desc, "%s/%s/%s/%s", res_name, ipv6 ? "ipv6" : "ipv4", item_name, addrset->svc_names[i]);
mon_list.info = realloc(mon_list.info, sizeof(mon_info_t) * (mon_list.count + 1));
mon_info_t* m = &mon_list.info[mon_list.count++];
m->svctype = addrset->svc_names[i];
m->desc = complete_desc;
m->addr = addr_txt;
m->state_ptr = &res_item->as[0].states[i];
}
log_debug("plugin_weighted: resource '%s' (%s), item '%s': A '%s' added w/ weight %u", res_name, stanza, item_name, addr_txt, res_item->weight);
}
F_NONNULL
static bool config_addr_group_addr(const char* lb_name, const unsigned lb_name_len V_UNUSED, const vscf_data_t* lb_data, void* iaga_asvoid) {
dmn_assert(lb_name); dmn_assert(lb_name_len); dmn_assert(lb_data); dmn_assert(iaga_asvoid);
iaga_t* iaga = (iaga_t*)iaga_asvoid;
addrset_t* addrset = iaga->addrset;
res_aitem_t* res_item = iaga->res_item;
unsigned lb_idx = iaga->lb_idx++;
const char* res_name = iaga->res_name;
const char* stanza = iaga->stanza;
const char* item_name = iaga->item_name;
const bool ipv6 = iaga->ipv6;
long lb_weight = 0;
if(!vscf_is_array(lb_data)
|| (2 != vscf_array_get_len(lb_data))
|| !vscf_is_simple(vscf_array_get_data(lb_data, 0))
|| !vscf_is_simple(vscf_array_get_data(lb_data, 1))
|| !vscf_simple_get_as_long(vscf_array_get_data(lb_data, 1), &lb_weight)
|| lb_weight < 1 || lb_weight > MAX_WEIGHT )
log_fatal("plugin_weighted: resource '%s', group '%s': values in address group mode must be arrays of [ IPADDR, WEIGHT ], where weight must be an integer in the range 1 - " MAX_WEIGHT_STR, res_name, item_name);
res_item->as[lb_idx].weight = lb_weight;
const char* addr_txt = vscf_simple_get_data(vscf_array_get_data(lb_data, 0));
int addr_err = gdnsd_anysin_getaddrinfo(addr_txt, NULL, &res_item->as[lb_idx].addr);
if(addr_err)
log_fatal("plugin_weighted: resource '%s', group '%s', addr '%s': parsing '%s' as an IP address failed: %s", res_name, item_name, lb_name, addr_txt, gai_strerror(addr_err));
if(ipv6 && res_item->as[lb_idx].addr.sa.sa_family != AF_INET6)
log_fatal("plugin_weighted: resource '%s' (%s): item '%s': '%s' is IPv4, was expecting IPv6", res_name, stanza, item_name, addr_txt);
else if(!ipv6 && res_item->as[lb_idx].addr.sa.sa_family != AF_INET)
log_fatal("plugin_weighted: resource '%s' (%s): item '%s': '%s' is IPv6, was expecting IPv4", res_name, stanza, item_name, addr_txt);
if(addrset->num_svcs) {
res_item->as[lb_idx].indices = malloc(addrset->num_svcs * sizeof(unsigned));
for(unsigned i = 0; i < addrset->num_svcs; i++)
res_item->as[lb_idx].indices[i] = gdnsd_mon_addr(addrset->svc_names[i], &res_item->as[lb_idx].addr);
}
log_debug("plugin_weighted: resource '%s' (%s), item '%s', address %s added with weight %u", res_name, stanza, item_name, addr_txt, res_item->as[lb_idx].weight);
return true;
}
F_NONNULL
static void config_item_addrs(res_aitem_t* res_item, const char* res_name, const char* stanza, const char* item_name, const bool ipv6, const vscf_data_t* cfg_data, addrset_t* addrset) {
dmn_assert(res_name); dmn_assert(stanza); dmn_assert(item_name);
dmn_assert(res_item); dmn_assert(cfg_data); dmn_assert(addrset);
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 addrs mode must be arrays of [ IPADDR, WEIGHT ], where weight must be an integer in the range 1 - " MAX_WEIGHT_STR, res_name, stanza, item_name);
res_item->count = 1;
res_item->as = calloc(res_item->count, sizeof(addrstate_t));
res_item->as[0].weight = wtemp;
res_item->max_weight = wtemp;
res_item->weight = wtemp;
const char* addr_txt = vscf_simple_get_data(vscf_array_get_data(cfg_data, 0));
int addr_err = gdnsd_anysin_getaddrinfo(addr_txt, NULL, &res_item->as[0].addr);
if(addr_err)
log_fatal("plugin_weighted: resource '%s' (%s): item '%s': parsing '%s' as an IP address failed: %s", res_name, stanza, item_name, addr_txt, gai_strerror(addr_err));
if(ipv6 && res_item->as[0].addr.sa.sa_family != AF_INET6)
log_fatal("plugin_weighted: resource '%s' (%s): item '%s': '%s' is IPv4, was expecting IPv6", res_name, stanza, item_name, addr_txt);
else if(!ipv6 && res_item->as[0].addr.sa.sa_family != AF_INET)
log_fatal("plugin_weighted: resource '%s' (%s): item '%s': '%s' is IPv6, was expecting IPv4", res_name, stanza, item_name, addr_txt);
if(addrset->num_svcs) {
res_item->as[0].indices = malloc(addrset->num_svcs * sizeof(unsigned));
for(unsigned i = 0; i < addrset->num_svcs; i++)
res_item->as[0].indices[i] = gdnsd_mon_addr(addrset->svc_names[i], &res_item->as[0].addr);
}
log_debug("plugin_weighted: resource '%s' (%s), item '%s': A '%s' added w/ weight %u", res_name, stanza, item_name, addr_txt, res_item->weight);
}
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;
}
