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Fix IP csum calculation on 8-bit platforms #2975

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merged 1 commit into from
Nov 26, 2024
Merged

Fix IP csum calculation on 8-bit platforms #2975

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2 changes: 1 addition & 1 deletion mongoose.c
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Original file line number Diff line number Diff line change
Expand Up @@ -4206,7 +4206,7 @@ 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;
}

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2 changes: 1 addition & 1 deletion src/net_builtin.c
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Original file line number Diff line number Diff line change
Expand Up @@ -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;
}

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