Blame SOURCES/rsyslog-8.24.0-rhbz1056548-getaddrinfo.patch

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diff --git a/runtime/net.c b/runtime/net.c
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index 3610fc5..2d8de94 100644
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--- a/runtime/net.c
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+++ b/runtime/net.c
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@@ -1181,26 +1181,24 @@ getLocalHostname(uchar **ppName)
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 	}
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 	char *dot = strstr(hnbuf, ".");
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+	struct addrinfo *res = NULL;
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 	if(!empty_hostname && dot == NULL) {
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 		/* we need to (try) to find the real name via resolver */
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-		struct hostent *hent = gethostbyname((char*)hnbuf);
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-		if(hent) {
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-			int i = 0;
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-			if(hent->h_aliases) {
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-				const size_t hnlen = strlen(hnbuf);
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-				for(i = 0; hent->h_aliases[i]; i++) {
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-					if(!strncmp(hent->h_aliases[i], hnbuf, hnlen)
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-					   && hent->h_aliases[i][hnlen] == '.') {
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-						break; /* match! */
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-					}
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-				}
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-			}
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-			if(hent->h_aliases && hent->h_aliases[i]) {
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-				CHKmalloc(fqdn = (uchar*)strdup(hent->h_aliases[i]));
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-			} else {
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-				CHKmalloc(fqdn = (uchar*)strdup(hent->h_name));
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+		struct addrinfo flags;
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+		memset(&flags, 0, sizeof(flags));
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+		flags.ai_flags = AI_CANONNAME;
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+		int error = getaddrinfo((char*)hnbuf, NULL, &flags, &res;;
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+		if (error != 0) {
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+			dbgprintf("getaddrinfo: %s\n", gai_strerror(error));
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+			ABORT_FINALIZE(RS_RET_IO_ERROR);
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+		}
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+		if (res != NULL) {
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+			/* When AI_CANONNAME is set first member of res linked-list */
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+			/* should contain what we need */
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+			if (res->ai_canonname != NULL && res->ai_canonname[0] != '\0') {
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+				CHKmalloc(fqdn = (uchar*)strdup(res->ai_canonname));
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+				dot = strstr((char*)fqdn, ".");
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 			}
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-			dot = strstr((char*)fqdn, ".");
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 		}
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 	}
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@@ -1215,6 +1213,9 @@ getLocalHostname(uchar **ppName)
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 	*ppName = fqdn;
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 finalize_it:
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+	if (res != NULL) {
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+		freeaddrinfo(res);
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+	}
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 	RETiRet;
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 }
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