1 files changed, 21 insertions, 13 deletions

diff --git a/ssh-keyscan.c b/ssh-keyscan.c
index 7d10c6c3e..64eecfb9a 100644
--- a/ssh-keyscan.c
+++ b/ssh-keyscan.c
@@ -7,7 +7,7 @@
  */
 
 #include "includes.h"
-RCSID("$OpenBSD: ssh-keyscan.c,v 1.52 2005/03/01 15:47:14 jmc Exp $");
+RCSID("$OpenBSD: ssh-keyscan.c,v 1.55 2005/06/17 02:44:33 djm Exp $");
 
 #include "openbsd-compat/sys-queue.h"
 
@@ -166,7 +166,7 @@ Linebuf_lineno(Linebuf * lb)
 static char *
 Linebuf_getline(Linebuf * lb)
 {
-        int n = 0;
+        size_t n = 0;
         void *p;
 
         lb->lineno++;
@@ -493,7 +493,7 @@ conrecycle(int s)
 static void
 congreet(int s)
 {
-        int remote_major = 0, remote_minor = 0, n = 0;
+        int n = 0, remote_major = 0, remote_minor = 0;
         char buf[256], *cp;
         char remote_version[sizeof buf];
         size_t bufsiz;
@@ -506,14 +506,17 @@ congreet(int s)
                         *cp = '\n';
                 cp++;
         }
-        if (n < 0) {
-                if (errno != ECONNREFUSED)
-                        error("read (%s): %s", c->c_name, strerror(errno));
-                conrecycle(s);
-                return;
-        }
         if (n == 0) {
-                error("%s: Connection closed by remote host", c->c_name);
+                switch (errno) {
+                case EPIPE:
+                        error("%s: Connection closed by remote host", c->c_name);
+                        break;
+                case ECONNREFUSED:
+                        break;
+                default:
+                        error("read (%s): %s", c->c_name, strerror(errno));
+                        break;
+                }
                 conrecycle(s);
                 return;
         }
@@ -543,7 +546,12 @@ congreet(int s)
         n = snprintf(buf, sizeof buf, "SSH-%d.%d-OpenSSH-keyscan\r\n",
             c->c_keytype == KT_RSA1? PROTOCOL_MAJOR_1 : PROTOCOL_MAJOR_2,
             c->c_keytype == KT_RSA1? PROTOCOL_MINOR_1 : PROTOCOL_MINOR_2);
-        if (atomicio(vwrite, s, buf, n) != n) {
+        if (n < 0 || (size_t)n >= sizeof(buf)) {
+                error("snprintf: buffer too small");
+                confree(s);
+                return;
+        }
+        if (atomicio(vwrite, s, buf, n) != (size_t)n) {
                 error("write (%s): %s", c->c_name, strerror(errno));
                 confree(s);
                 return;
@@ -561,14 +569,14 @@ static void
 conread(int s)
 {
         con *c = &fdcon[s];
-        int n;
+        size_t n;
 
         if (c->c_status == CS_CON) {
                 congreet(s);
                 return;
         }
         n = atomicio(read, s, c->c_data + c->c_off, c->c_len - c->c_off);
-        if (n < 0) {
+        if (n == 0) {
                 error("read (%s): %s", c->c_name, strerror(errno));
                 confree(s);
                 return;