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cpq committed 2021-04-13 19:42:47 +01:00
1 parent 5430408218
commit e217066bf6
2 files changed
+2 -4
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mongoose.c
+1 -2
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@@ -195,11 +195,10 @@ size_t mg_dns_parse_name(const uint8_t *s, size_t n, size_t ofs, char *dst,
size_t mg_dns_parse_rr(const uint8_t *buf, size_t len, size_t ofs, size_t mg_dns_parse_rr(const uint8_t *buf, size_t len, size_t ofs,
bool is_question, struct mg_dns_rr *rr) { bool is_question, struct mg_dns_rr *rr) {
const struct mg_dns_header *h = (struct mg_dns_header *) buf;
const uint8_t *s = buf + ofs, *e = &buf[len]; const uint8_t *s = buf + ofs, *e = &buf[len];
memset(rr, 0, sizeof(*rr)); memset(rr, 0, sizeof(*rr));
if (len < sizeof(*h)) return 0; // Too small, headers dont fit if (len < sizeof(struct mg_dns_header)) return 0; // Too small
if (len > 512) return 0; // Too large, we don't expect that if (len > 512) return 0; // Too large, we don't expect that
if (s >= e) return 0; // Overflow if (s >= e) return 0; // Overflow
src/dns.c
+1 -2
View File
@@ -70,11 +70,10 @@ size_t mg_dns_parse_name(const uint8_t *s, size_t n, size_t ofs, char *dst,
size_t mg_dns_parse_rr(const uint8_t *buf, size_t len, size_t ofs, size_t mg_dns_parse_rr(const uint8_t *buf, size_t len, size_t ofs,
bool is_question, struct mg_dns_rr *rr) { bool is_question, struct mg_dns_rr *rr) {
const struct mg_dns_header *h = (struct mg_dns_header *) buf;
const uint8_t *s = buf + ofs, *e = &buf[len]; const uint8_t *s = buf + ofs, *e = &buf[len];
memset(rr, 0, sizeof(*rr)); memset(rr, 0, sizeof(*rr));
if (len < sizeof(*h)) return 0; // Too small, headers dont fit if (len < sizeof(struct mg_dns_header)) return 0; // Too small
if (len > 512) return 0; // Too large, we don't expect that if (len > 512) return 0; // Too large, we don't expect that
if (s >= e) return 0; // Overflow if (s >= e) return 0; // Overflow