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Fix the display of "Unknown protocol" in ippackethdrinfo.

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nexthdrtoa always returns the same static buffer, so it is never NULL.
Check for an empty string instead.
This commit is contained in:
david
2012-02-24 05:01:41 +00:00
parent c1e1a12e2c
commit 49c6b65a5a
1 changed files with 5 additions and 2 deletions
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7
libnetutil/netutil.cc
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@@ -2931,12 +2931,15 @@ icmpbad:
hdr.proto, srchost, dsthost,
icmpv6->icmpv6_type, icmpv6->icmpv6_code, ipinfo);
} else {
if (nexthdrtoa(hdr.proto, 1) == NULL) {
const char *hdrstr;
hdrstr = nexthdrtoa(hdr.proto, 1);
if (hdrstr == NULL || *hdrstr == '\0') {
Snprintf(protoinfo, sizeof(protoinfo), "Unknown protocol (%d) %s > %s: %s",
hdr.proto, srchost, dsthost, ipinfo);
} else {
Snprintf(protoinfo, sizeof(protoinfo), "%s (%d) %s > %s: %s",
nexthdrtoa(hdr.proto, 1), hdr.proto, srchost, dsthost, ipinfo);
hdrstr, hdr.proto, srchost, dsthost, ipinfo);
}
}