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net/nanocoap: fix remaining space calculation

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The space calculation must use the same length as the eventual
return value.
This commit is contained in:
Ken Bannister 2019-01-23 16:19:47 -05:00
parent e1bebed512
commit e35bcb6853
1 changed files with 1 additions and 1 deletions
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2
sys/net/application_layer/nanocoap/nanocoap.c
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@ -364,7 +364,7 @@ ssize_t coap_build_reply(coap_pkt_t *pkt, unsigned code,
unsigned tkl = coap_get_token_len(pkt);
unsigned len = sizeof(coap_hdr_t) + tkl;
if ((len + payload_len + 1) > rlen) {
if ((len + payload_len) > rlen) {
return -ENOSPC;
}