Backported a fix for wrong segment size calculation.

Original fix is here: lwip-tcpip/lwip@8e8571d Issue spotted and documented here: SmingHub/Sming#2654
slaff · Aug 10, 2023 · 44948e8 · 44948e8
1 parent b9a23a6
commit 44948e8
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/lwip/core/tcp_out.c b/lwip/core/tcp_out.c
@@ -448,7 +448,7 @@ tcp_write(struct tcp_pcb *pcb, const void *arg, u16_t len, u8_t apiflags)
     if (oversize > 0) {
       LWIP_ASSERT("inconsistent oversize vs. space", oversize_used <= space);
       seg = last_unsent;
-      oversize_used = oversize < len ? oversize : len;
+      oversize_used = LWIP_MIN(space, LWIP_MIN(oversize, len));
       pos += oversize_used;
       oversize -= oversize_used;
       space -= oversize_used;