[sr-dev] git:5.1:476a922a: core: udp server - cast printed debug chars to unsigned

[Daniel-Constantin Mierla]

Module: kamailio
Branch: 5.1
Commit: 476a922ad4d50b05a95e43c20c4a2b8b6a98a78f
URL: https://github.com/kamailio/kamailio/commit/476a922ad4d50b05a95e43c20c4a2b8b6a98a78f

Author: Daniel-Constantin Mierla <miconda at gmail.com>
Committer: Daniel-Constantin Mierla <miconda at gmail.com>
Date: 2018-01-17T22:49:45+01:00

core: udp server - cast printed debug chars to unsigned

- reported by GH #1403

(cherry picked from commit 64a391a2408b1d34569947f8b028915ec3462e6d)

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Modified: src/core/udp_server.c

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Diff:  https://github.com/kamailio/kamailio/commit/476a922ad4d50b05a95e43c20c4a2b8b6a98a78f.diff
Patch: https://github.com/kamailio/kamailio/commit/476a922ad4d50b05a95e43c20c4a2b8b6a98a78f.patch

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diff --git a/src/core/udp_server.c b/src/core/udp_server.c
index b88d3d8f51..3d54c5a9a6 100644
--- a/src/core/udp_server.c
+++ b/src/core/udp_server.c
@@ -479,7 +479,7 @@ int udp_rcv_loop()
 				if(isprint(buf[i])) {
 					printbuf[j++] = buf[i];
 				} else {
-					l = snprintf(printbuf+j, 6, " %02X ", buf[i]);
+					l = snprintf(printbuf+j, 6, " %02X ", (unsigned char)buf[i]);
 					if(l<0 || l>=6) {
 						LM_ERR("print buffer building failed (%d/%d/%d)\n",
 								l, j, i);