X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=src%2Fnetwork%2Fgetservbyname_r.c;h=cad6317ab84243e5bc8de3a1d8ce17eb4a688a5e;hb=51d4669fb97782f6a66606da852b5afd49a08001;hp=811c174c8bc209aebb5fb2118ae3218be993542b;hpb=75fff40b9b536e0e6847d17ecc076894ca7b7068;p=musl

diff --git a/src/network/getservbyname_r.c b/src/network/getservbyname_r.c
index 811c174c..cad6317a 100644
--- a/src/network/getservbyname_r.c
+++ b/src/network/getservbyname_r.c
@@ -5,49 +5,51 @@
 #include <inttypes.h>
 #include <errno.h>
 #include <string.h>
+#include <stdlib.h>
+#include "lookup.h"
+
+#define ALIGN (sizeof(struct { char a; char *b; }) - sizeof(char *))
 
 int getservbyname_r(const char *name, const char *prots,
 	struct servent *se, char *buf, size_t buflen, struct servent **res)
 {
-	struct addrinfo *ai, hint = { .ai_family = AF_INET };
-	int i;
+	struct service servs[MAXSERVS];
+	int cnt, proto, align;
 
-	if (!prots) {
-		int r = getservbyname_r(name, "tcp", se, buf, buflen, res);
-		if (r) r = getservbyname_r(name, "udp", se, buf, buflen, res);
-		return r;
-	}
+	*res = 0;
+
+	/* Don't treat numeric port number strings as service records. */
+	char *end = "";
+	strtoul(name, &end, 10);
+	if (!*end) return ENOENT;
 
 	/* Align buffer */
-	i = (uintptr_t)buf & sizeof(char *)-1;
-	if (!i) i = sizeof(char *);
-	if (buflen < 3*sizeof(char *)-i)
+	align = -(uintptr_t)buf & ALIGN-1;
+	if (buflen < 2*sizeof(char *)+align)
 		return ERANGE;
-	buf += sizeof(char *)-i;
-	buflen -= sizeof(char *)-i;
+	buf += align;
 
-	if (!strcmp(prots, "tcp")) hint.ai_protocol = IPPROTO_TCP;
-	else if (!strcmp(prots, "udp")) hint.ai_protocol = IPPROTO_UDP;
+	if (!prots) proto = 0;
+	else if (!strcmp(prots, "tcp")) proto = IPPROTO_TCP;
+	else if (!strcmp(prots, "udp")) proto = IPPROTO_UDP;
 	else return EINVAL;
 
-	switch (getaddrinfo(0, name, &hint, &ai)) {
+	cnt = __lookup_serv(servs, name, proto, 0, 0);
+	if (cnt<0) switch (cnt) {
 	case EAI_MEMORY:
 	case EAI_SYSTEM:
 		return ENOMEM;
 	default:
 		return ENOENT;
-	case 0:
-		break;
 	}
 
 	se->s_name = (char *)name;
 	se->s_aliases = (void *)buf;
 	se->s_aliases[0] = se->s_name;
 	se->s_aliases[1] = 0;
-	se->s_port = ((struct sockaddr_in *)ai->ai_addr)->sin_port;
-	se->s_proto = (char *)prots;
+	se->s_port = htons(servs[0].port);
+	se->s_proto = servs[0].proto == IPPROTO_TCP ? "tcp" : "udp";
 
-	freeaddrinfo(ai);
 	*res = se;
 	return 0;
 }