forked from agorise/c-ipfs
125 lines
3.8 KiB
C
125 lines
3.8 KiB
C
#include <stdlib.h>
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#include <string.h>
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#include "ipfs/util/errs.h"
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#include "ipfs/util/time.h"
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#include "ipfs/namesys/pb.h"
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#include "ipfs/namesys/publisher.h"
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char* ipns_entry_data_for_sig (struct ipns_entry *entry)
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{
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char *ret;
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if (!entry || !entry->value || !entry->validity) {
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return NULL;
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}
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ret = calloc (1, strlen(entry->value) + strlen (entry->validity) + sizeof(IpnsEntry_ValidityType) + 1);
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if (ret) {
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strcpy(ret, entry->value);
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strcat(ret, entry->validity);
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if (entry->validityType) {
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memcpy(ret+strlen(entry->value)+strlen(entry->validity), entry->validityType, sizeof(IpnsEntry_ValidityType));
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} else {
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memcpy(ret+strlen(entry->value)+strlen(entry->validity), &IpnsEntry_EOL, sizeof(IpnsEntry_ValidityType));
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}
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}
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return ret;
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}
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int ipns_selector_func (int *idx, struct ipns_entry ***recs, char *k, char **vals)
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{
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int err, i, c;
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if (!idx || !recs || !k || !vals) {
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return ErrInvalidParam;
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}
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for (c = 0 ; vals[c] ; c++); // count array
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*recs = calloc(c+1, sizeof (void*)); // allocate return array.
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if (!*recs) {
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return ErrAllocFailed;
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}
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for (i = 0 ; i < c ; i++) {
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*recs[i] = calloc(1, sizeof (struct ipns_entry)); // alloc every record
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if (!*recs[i]) {
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return ErrAllocFailed;
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}
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//err = proto.Unmarshal(vals[i], *recs[i]); // and decode.
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if (err) {
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ipfs_namesys_ipnsentry_reset (*recs[i]); // make sure record is empty.
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}
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}
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return ipns_select_record(idx, *recs, vals);
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}
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int ipns_select_record (int *idx, struct ipns_entry **recs, char **vals)
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{
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int err, i, best_i = -1, best_seq = 0;
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struct timespec rt, bestt;
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if (!idx || !recs || !vals) {
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return ErrInvalidParam;
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}
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for (i = 0 ; recs[i] ; i++) {
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if (!(recs[i]->sequence) || *(recs[i]->sequence) < best_seq) {
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continue;
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}
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if (best_i == -1 || *(recs[i]->sequence) > best_seq) {
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best_seq = *(recs[i]->sequence);
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best_i = i;
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} else if (*(recs[i]->sequence) == best_seq) {
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err = ipfs_util_time_parse_RFC3339 (&rt, ipfs_namesys_pb_get_validity (recs[i]));
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if (err) {
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continue;
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}
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err = ipfs_util_time_parse_RFC3339 (&bestt, ipfs_namesys_pb_get_validity (recs[best_i]));
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if (err) {
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continue;
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}
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if (rt.tv_sec > bestt.tv_sec || (rt.tv_sec == bestt.tv_sec && rt.tv_nsec > bestt.tv_nsec)) {
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best_i = i;
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} else if (rt.tv_sec == bestt.tv_sec && rt.tv_nsec == bestt.tv_nsec) {
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if (memcmp(vals[i], vals[best_i], strlen(vals[best_i])) > 0) { // FIXME: strlen?
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best_i = i;
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}
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}
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}
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}
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if (best_i == -1) {
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return ErrNoRecord;
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}
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*idx = best_i;
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return 0;
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}
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// ipns_validate_ipns_record implements ValidatorFunc and verifies that the
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// given 'val' is an IpnsEntry and that that entry is valid.
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int ipns_validate_ipns_record (char *k, char *val)
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{
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int err;
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struct ipns_entry *entry = ipfs_namesys_pb_new_ipns_entry();
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struct timespec ts, now;
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if (!entry) {
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return ErrAllocFailed;
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}
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//err = proto.Unmarshal(val, entry);
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if (err) {
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return err;
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}
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if (ipfs_namesys_pb_get_validity_type (entry) == IpnsEntry_EOL) {
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err = ipfs_util_time_parse_RFC3339 (&ts, ipfs_namesys_pb_get_validity (entry));
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if (err) {
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//log.Debug("failed parsing time for ipns record EOL")
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return err;
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}
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timespec_get (&now, TIME_UTC);
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if (now.tv_nsec > ts.tv_nsec || (now.tv_nsec == ts.tv_nsec && now.tv_nsec > ts.tv_nsec)) {
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return ErrExpiredRecord;
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}
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} else {
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return ErrUnrecognizedValidity;
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}
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}
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