1 files changed, 135 insertions, 0 deletions

diff --git a/openbsd-compat/fake-getaddrinfo.c b/openbsd-compat/fake-getaddrinfo.c
new file mode 100644
index 000000000..e63bda970
--- /dev/null
+++ b/openbsd-compat/fake-getaddrinfo.c
@@ -0,0 +1,135 @@
+/*
+ * 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 "includes.h"
+#include "ssh.h"
+
+RCSID("$Id: fake-getaddrinfo.c,v 1.5 2003/03/24 02:35:59 djm Exp $");
+
+#ifndef HAVE_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.";
+                default:
+                        return "unknown error.";
+        }
+}    
+#endif /* !HAVE_GAI_STRERROR */
+
+#ifndef HAVE_FREEADDRINFO
+void freeaddrinfo(struct addrinfo *ai)
+{
+        struct addrinfo *next;
+
+        do {
+                next = ai->ai_next;
+                free(ai);
+        } while (NULL != (ai = next));
+}
+#endif /* !HAVE_FREEADDRINFO */
+
+#ifndef HAVE_GETADDRINFO
+static struct addrinfo *malloc_ai(int port, u_long addr)
+{
+        struct addrinfo *ai;
+
+        ai = malloc(sizeof(struct addrinfo) + sizeof(struct sockaddr_in));
+        if (ai == NULL)
+                return(NULL);
+        
+        memset(ai, 0, sizeof(struct addrinfo) + sizeof(struct sockaddr_in));
+        
+        ai->ai_addr = (struct sockaddr *)(ai + 1);
+        /* XXX -- ssh doesn't use sa_len */
+        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 *cur, *prev = NULL;
+        struct hostent *hp;
+        struct servent *sp;
+        struct in_addr in;
+        int i;
+        long int port;
+        u_long addr;
+
+        port = 0;
+        if (servname != NULL) {
+                char *cp;
+
+                port = strtol(servname, &cp, 10);
+                if (port > 0 && port <= 65535 && *cp == '\0')
+                        port = htons(port);
+                else if ((sp = getservbyname(servname, NULL)) != NULL)
+                        port = sp->s_port;
+                else
+                        port = 0;
+        }
+
+        if (hints && hints->ai_flags & AI_PASSIVE) {
+                addr = htonl(0x00000000);
+                if (hostname && inet_aton(hostname, &in) != 0)
+                        addr = in.s_addr;
+                if (NULL != (*res = malloc_ai(port, addr)))
+                        return 0;
+                else
+                        return EAI_MEMORY;
+        }
+                
+        if (!hostname) {
+                if (NULL != (*res = malloc_ai(port, htonl(0x7f000001))))
+                        return 0;
+                else
+                        return EAI_MEMORY;
+        }
+        
+        if (inet_aton(hostname, &in)) {
+                if (NULL != (*res = malloc_ai(port, in.s_addr)))
+                        return 0;
+                else
+                        return EAI_MEMORY;
+        }
+        
+        hp = gethostbyname(hostname);
+        if (hp && hp->h_name && hp->h_name[0] && hp->h_addr_list[0]) {
+                for (i = 0; hp->h_addr_list[i]; i++) {
+                        cur = malloc_ai(port, ((struct in_addr *)hp->h_addr_list[i])->s_addr);
+                        if (cur == NULL) {
+                                if (*res)
+                                        freeaddrinfo(*res);
+                                return EAI_MEMORY;
+                        }
+                        
+                        if (prev)
+                                prev->ai_next = cur;
+                        else
+                                *res = cur;
+
+                        prev = cur;
+                }
+                return 0;
+        }
+        
+        return EAI_NODATA;
+}
+#endif /* !HAVE_GETADDRINFO */