X-Git-Url: http://tinc-vpn.org/git/browse?a=blobdiff_plain;f=src%2Ffake-getaddrinfo.c;fp=src%2Ffake-getaddrinfo.c;h=df3d34764dc9680dd1d625cd10ed94e2bdfb19d0;hb=35b1c25093a478d20e01f0ff391c9cdc9c41c2b8;hp=0000000000000000000000000000000000000000;hpb=41497246eeccbcc417f93c2ae087e927751c6914;p=tinc

diff --git a/src/fake-getaddrinfo.c b/src/fake-getaddrinfo.c
new file mode 100644
index 00000000..df3d3476
--- /dev/null
+++ b/src/fake-getaddrinfo.c
@@ -0,0 +1,102 @@
+/*
+ * fake library for ssh
+ *
+ * This file includes getaddrinfo(), freeaddrinfo() and gai_strerror().
+ * These funtions are defined in rfc2133.
+ *
+ * But these functions are not implemented correctly. The minimum subset
+ * is implemented for ssh use only. For exapmle, this routine assumes
+ * that ai_family is AF_INET. Don't use it for another purpose.
+ */
+
+#include "system.h"
+
+#include "ipv4.h"
+#include "ipv6.h"
+#include "fake-getaddrinfo.h"
+#include "xalloc.h"
+
+
+#if !HAVE_DECL_GAI_STRERROR
+char *gai_strerror(int ecode) {
+	switch (ecode) {
+		case EAI_NODATA:
+			return "No address associated with hostname";
+		case EAI_MEMORY:
+			return "Memory allocation failure";
+		case EAI_FAMILY:
+			return "Address family not supported";
+		default:
+			return "Unknown error";
+	}
+}    
+#endif /* !HAVE_GAI_STRERROR */
+
+#if !HAVE_DECL_FREEADDRINFO
+void freeaddrinfo(struct addrinfo *ai) {
+	struct addrinfo *next;
+
+	while(ai) {
+		next = ai->ai_next;
+		free(ai);
+		ai = next;
+	}
+}
+#endif /* !HAVE_FREEADDRINFO */
+
+#if !HAVE_DECL_GETADDRINFO
+static struct addrinfo *malloc_ai(uint16_t port, uint32_t addr) {
+	struct addrinfo *ai;
+
+	ai = xmalloc_and_zero(sizeof(struct addrinfo) + sizeof(struct sockaddr_in));
+	
+	ai->ai_addr = (struct sockaddr *)(ai + 1);
+	ai->ai_addrlen = sizeof(struct sockaddr_in);
+	ai->ai_addr->sa_family = ai->ai_family = AF_INET;
+
+	((struct sockaddr_in *)(ai)->ai_addr)->sin_port = port;
+	((struct sockaddr_in *)(ai)->ai_addr)->sin_addr.s_addr = addr;
+	
+	return ai;
+}
+
+int getaddrinfo(const char *hostname, const char *servname, const struct addrinfo *hints, struct addrinfo **res) {
+	struct addrinfo *prev = NULL;
+	struct hostent *hp;
+	struct in_addr in = {0};
+	int i;
+	uint16_t port = 0;
+
+	if(hints && hints->ai_family != AF_INET && hints->ai_family != AF_UNSPEC)
+		return EAI_FAMILY;
+
+	if (servname)
+		port = htons(atoi(servname));
+
+	if (hints && hints->ai_flags & AI_PASSIVE) {
+		*res = malloc_ai(port, htonl(0x00000000));
+		return 0;
+	}
+		
+	if (!hostname) {
+		*res = malloc_ai(port, htonl(0x7f000001));
+		return 0;
+	}
+	
+	hp = gethostbyname(hostname);
+
+	if(!hp || !hp->h_addr_list || !hp->h_addr_list[0])
+		return EAI_NODATA;
+
+	for (i = 0; hp->h_addr_list[i]; i++) {
+		*res = malloc_ai(port, ((struct in_addr *)hp->h_addr_list[i])->s_addr);
+
+		if(prev)
+			prev->ai_next = *res;
+
+		prev = *res;
+	}
+
+	return 0;
+}
+#endif /* !HAVE_GETADDRINFO */