Merge pull request #2975 from cesanta/ipsum

Fix IP csum calculation on 8-bit platforms
2024-12-11 23:19:00 +08:00 · 2024-11-26 17:36:43 -03:00 · 2024-11-26 17:36:43 -03:00 · 74f77c9ded
commit 74f77c9ded
parent 3caca03e8a 49469840ab
2 changed files with 2 additions and 2 deletions
--- a/mongoose.c
+++ b/mongoose.c
@ -4216,7 +4216,7 @@ static void mkpay(struct pkt *pkt, void *p) {
 static uint32_t csumup(uint32_t sum, const void *buf, size_t len) {
  size_t i;
  const uint8_t *p = (const uint8_t *) buf;
-  for (i = 0; i < len; i++) sum += i & 1 ? p[i] : (uint32_t) (p[i] << 8);
+  for (i = 0; i < len; i++) sum += i & 1 ? p[i] : ((uint32_t) p[i]) << 8;
  return sum;
 }

--- a/src/net_builtin.c
+++ b/src/net_builtin.c
@ -152,7 +152,7 @@ static void mkpay(struct pkt *pkt, void *p) {
 static uint32_t csumup(uint32_t sum, const void *buf, size_t len) {
  size_t i;
  const uint8_t *p = (const uint8_t *) buf;
-  for (i = 0; i < len; i++) sum += i & 1 ? p[i] : (uint32_t) (p[i] << 8);
+  for (i = 0; i < len; i++) sum += i & 1 ? p[i] : ((uint32_t) p[i]) << 8;
  return sum;
 }