- djm@cvs.openbsd.org 2010/01/30 02:54:53

[openssh.git] / roaming_common.c

diff --git a/roaming_common.c b/roaming_common.c
index 73db09d798ebd8cd61e5869423ccaedfd851d7a8..9adbe56fcbb941126902a66af1d51317a4314c31 100644 (file)
--- a/roaming_common.c
+++ b/roaming_common.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: roaming_common.c,v 1.5 2009/06/27 09:32:43 andreas Exp $ */
+/* $OpenBSD: roaming_common.c,v 1.8 2010/01/12 00:59:29 djm Exp $ */
 /*
  * Copyright (c) 2004-2009 AppGate Network Security AB
  *
@@ -52,9 +52,9 @@ int
 get_snd_buf_size()
 {
        int fd = packet_get_connection_out();
-       int optval, optvallen;
+       int optval;
+       socklen_t optvallen = sizeof(optval);
 
-       optvallen = sizeof(optval);
        if (getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &optval, &optvallen) != 0)
                optval = DEFAULT_ROAMBUF;
        return optval;
@@ -64,9 +64,9 @@ int
 get_recv_buf_size()
 {
        int fd = packet_get_connection_in();
-       int optval, optvallen;
+       int optval;
+       socklen_t optvallen = sizeof(optval);
 
-       optvallen = sizeof(optval);
        if (getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &optval, &optvallen) != 0)
                optval = DEFAULT_ROAMBUF;
        return optval;
@@ -145,8 +145,16 @@ roaming_write(int fd, const void *buf, size_t count, int *cont)
                if (out_buf_size > 0)
                        buf_append(buf, ret);
        }
-       debug3("Wrote %ld bytes for a total of %llu", (long)ret,
-           (unsigned long long)write_bytes);
+       if (out_buf_size > 0 &&
+           (ret == 0 || (ret == -1 && errno == EPIPE))) {
+               if (wait_for_roaming_reconnect() != 0) {
+                       ret = 0;
+                       *cont = 1;
+               } else {
+                       ret = -1;
+                       errno = EAGAIN;
+               }
+       }
        return ret;
 }
 
@@ -158,6 +166,15 @@ roaming_read(int fd, void *buf, size_t count, int *cont)
                if (!resume_in_progress) {
                        read_bytes += ret;
                }
+       } else if (out_buf_size > 0 &&
+           (ret == 0 || (ret == -1 && (errno == ECONNRESET
+           || errno == ECONNABORTED || errno == ETIMEDOUT
+           || errno == EHOSTUNREACH)))) {
+               debug("roaming_read failed for %d  ret=%ld  errno=%d",
+                   fd, (long)ret, errno);
+               ret = 0;
+               if (wait_for_roaming_reconnect() == 0)
+                       *cont = 1;
        }
        return ret;
 }
@@ -199,3 +216,29 @@ resend_bytes(int fd, u_int64_t *offset)
                atomicio(vwrite, fd, out_buf + (out_last - needed), needed);
        }
 }
+
+/*
+ * Caclulate a new key after a reconnect
+ */
+void
+calculate_new_key(u_int64_t *key, u_int64_t cookie, u_int64_t challenge)
+{
+       const EVP_MD *md = EVP_sha1();
+       EVP_MD_CTX ctx;
+       char hash[EVP_MAX_MD_SIZE];
+       Buffer b;
+
+       buffer_init(&b);
+       buffer_put_int64(&b, *key);
+       buffer_put_int64(&b, cookie);
+       buffer_put_int64(&b, challenge);
+
+       EVP_DigestInit(&ctx, md);
+       EVP_DigestUpdate(&ctx, buffer_ptr(&b), buffer_len(&b));
+       EVP_DigestFinal(&ctx, hash, NULL);
+
+       buffer_clear(&b);
+       buffer_append(&b, hash, EVP_MD_size(md));
+       *key = buffer_get_int64(&b);
+       buffer_free(&b);
+}