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Minor optimization for name resolution: null servname

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This commit is contained in:
dmiller
2021-07-22 17:18:29 +00:00
parent 7bf0a7f016
commit d15747db32
1 changed files with 7 additions and 3 deletions
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6
libnetutil/netutil.cc
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@@ -358,6 +358,7 @@ static int resolve_internal(const char *hostname, unsigned short port,
struct addrinfo hints; struct addrinfo hints;
struct addrinfo *result; struct addrinfo *result;
char portbuf[16]; char portbuf[16];
char *servname = NULL;
int rc; int rc;
assert(hostname); assert(hostname);
@@ -370,10 +371,13 @@ static int resolve_internal(const char *hostname, unsigned short port,
hints.ai_flags |= addl_flags; hints.ai_flags |= addl_flags;
/* Make the port number a string to give to getaddrinfo. */ /* Make the port number a string to give to getaddrinfo. */
if (port != 0) {
rc = Snprintf(portbuf, sizeof(portbuf), "%hu", port); rc = Snprintf(portbuf, sizeof(portbuf), "%hu", port);
assert(rc >= 0 && (size_t) rc < sizeof(portbuf)); assert(rc >= 0 && (size_t) rc < sizeof(portbuf));
servname = portbuf;
}
rc = getaddrinfo(hostname, portbuf, &hints, &result); rc = getaddrinfo(hostname, servname, &hints, &result);
if (rc != 0) if (rc != 0)
return rc; return rc;
if (result == NULL) if (result == NULL)