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Set DNS error on UDP send error

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This commit is contained in:
Sergey Lyubka 2022-04-01 15:41:23 +01:00
parent b42ea6cd3c
commit 6990040626
1 changed files with 5 additions and 10 deletions
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15
src/dns.c
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@ -192,7 +192,7 @@ static void dns_cb(struct mg_connection *c, int ev, void *ev_data,
(void) fn_data;
}
static void mg_dns_send(struct mg_connection *c, const struct mg_str *name,
static bool mg_dns_send(struct mg_connection *c, const struct mg_str *name,
uint16_t txnid, bool ipv6) {
struct {
struct mg_dns_header header;
@ -216,14 +216,7 @@ static void mg_dns_send(struct mg_connection *c, const struct mg_str *name,
if (ipv6) pkt.data[n - 3] = 0x1c; // AAAA query
// memcpy(&pkt.data[n], "\xc0\x0c\x00\x1c\x00\x01", 6); // AAAA query
// n += 6;
mg_send(c, &pkt, sizeof(pkt.header) + n);
#if 0
// Immediately after A query, send AAAA query. Whatever reply comes first,
// we'll use it. Note: we cannot send two queries in a single packet.
// https://stackoverflow.com/questions/4082081/requesting-a-and-aaaa-records-in-single-dns-query
pkt.data[n - 3] = 0x1c; // AAAA query
mg_send(c, &pkt, sizeof(pkt.header) + n);
#endif
return mg_send(c, &pkt, sizeof(pkt.header) + n);
}
static void mg_sendnsreq(struct mg_connection *c, struct mg_str *name, int ms,
@ -252,7 +245,9 @@ static void mg_sendnsreq(struct mg_connection *c, struct mg_str *name, int ms,
c->is_resolving = 1;
MG_VERBOSE(("%lu resolving %.*s @ %s, txnid %hu", c->id, (int) name->len,
name->ptr, mg_ntoa(&dnsc->c->rem, buf, sizeof(buf)), d->txnid));
mg_dns_send(dnsc->c, name, d->txnid, ipv6);
if (!mg_dns_send(dnsc->c, name, d->txnid, ipv6)) {
mg_error(dnsc->c, "DNS send");
}
}
}