Kalev Lember
6 years ago
parent
0ec9c1c396
commit
dfacd0d178
@ -1,124 +0,0 @@
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From 1108498d2a1a9c47931f41b04f248616b29383d6 Mon Sep 17 00:00:00 2001
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From: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
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Date: Mon, 5 Sep 2016 21:49:07 +0000
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Subject: [PATCH] transmission: build against openssl 1.1.0
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Signed-off-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
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---
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libtransmission/crypto-utils-openssl.c | 73 ++++++++++++++++++++++++++++++++--
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1 file changed, 69 insertions(+), 4 deletions(-)
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diff --git a/libtransmission/crypto-utils-openssl.c b/libtransmission/crypto-utils-openssl.c
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index 77a628bea..16a37b205 100644
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--- a/libtransmission/crypto-utils-openssl.c
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+++ b/libtransmission/crypto-utils-openssl.c
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@@ -230,6 +230,61 @@ tr_rc4_process (tr_rc4_ctx_t handle,
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****
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***/
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+#if OPENSSL_VERSION_NUMBER < 0x10100000
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+static inline int
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+DH_set0_pqg (DH * dh,
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+ BIGNUM * p,
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+ BIGNUM * q,
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+ BIGNUM * g)
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+{
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+ /* If the fields p and g in d are NULL, the corresponding input
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+ * parameters MUST be non-NULL. q may remain NULL.
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+ */
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+ if ((dh->p == NULL && p == NULL)
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+ || (dh->g == NULL && g == NULL))
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+ return 0;
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+
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+ if (p != NULL) {
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+ BN_free (dh->p);
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+ dh->p = p;
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+ }
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+ if (q != NULL) {
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+ BN_free (dh->q);
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+ dh->q = q;
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+ }
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+ if (g != NULL) {
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+ BN_free (dh->g);
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+ dh->g = g;
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+ }
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+
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+ if (q != NULL) {
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+ dh->length = BN_num_bits (q);
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+ }
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+
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+ return 1;
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+}
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+
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+static inline int
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+DH_set_length (DH * dh,
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+ long length)
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+{
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+ dh->length = length;
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+ return 1;
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+}
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+
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+static inline void
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+DH_get0_key(const DH * dh,
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+ const BIGNUM ** pub_key,
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+ const BIGNUM ** priv_key)
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+{
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+ if (pub_key != NULL)
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+ *pub_key = dh->pub_key;
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+ if (priv_key != NULL)
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+ *priv_key = dh->priv_key;
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+}
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+
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+#endif
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+
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tr_dh_ctx_t
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tr_dh_new (const uint8_t * prime_num,
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size_t prime_num_length,
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@@ -237,13 +292,19 @@ tr_dh_new (const uint8_t * prime_num,
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size_t generator_num_length)
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{
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DH * handle = DH_new ();
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+ BIGNUM * p, * g;
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assert (prime_num != NULL);
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assert (generator_num != NULL);
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+ p = BN_bin2bn (prime_num, prime_num_length, NULL);
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+ g = BN_bin2bn (generator_num, generator_num_length, NULL);
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- if (!check_pointer (handle->p = BN_bin2bn (prime_num, prime_num_length, NULL)) ||
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- !check_pointer (handle->g = BN_bin2bn (generator_num, generator_num_length, NULL)))
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+ if (!check_pointer (p) ||
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+ !check_pointer (g) ||
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+ !DH_set0_pqg (handle, p, NULL, g))
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{
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+ BN_free (p);
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+ BN_free (g);
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DH_free (handle);
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handle = NULL;
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}
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@@ -268,16 +329,20 @@ tr_dh_make_key (tr_dh_ctx_t raw_handle,
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{
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DH * handle = raw_handle;
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int dh_size, my_public_key_length;
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+ const BIGNUM * hand_pub_key;
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assert (handle != NULL);
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assert (public_key != NULL);
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- handle->length = private_key_length * 8;
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+
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+ DH_set_length(handle, private_key_length * 8);
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if (!check_result (DH_generate_key (handle)))
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return false;
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- my_public_key_length = BN_bn2bin (handle->pub_key, public_key);
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+ DH_get0_key (handle, &hand_pub_key, NULL);
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+
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+ my_public_key_length = BN_bn2bin (hand_pub_key, public_key);
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dh_size = DH_size (handle);
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tr_dh_align_key (public_key, my_public_key_length, dh_size);
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--
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2.14.3
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@ -1,302 +0,0 @@
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Fix a weakness that allows remote code execution via the Transmission
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RPC server using DNS rebinding:
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https://bugs.chromium.org/p/project-zero/issues/detail?id=1447
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Patch adapted from Tavis Ormandy's patch on the Transmission master
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branch to the Transmission 2.92 release by Leo Famulari
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<leo@famulari.name>:
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https://github.com/transmission/transmission/pull/468/commits
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From fe2d3c6e75088f3d9b6040ce06da3d530358bc2f Mon Sep 17 00:00:00 2001
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From: Tavis Ormandy <taviso@google.com>
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Date: Thu, 11 Jan 2018 10:00:41 -0800
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Subject: [PATCH] mitigate dns rebinding attacks against daemon
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---
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libtransmission/quark.c | 2 +
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libtransmission/quark.h | 2 +
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libtransmission/rpc-server.c | 116 +++++++++++++++++++++++++++++++++++++----
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libtransmission/rpc-server.h | 4 ++
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libtransmission/session.c | 2 +
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libtransmission/transmission.h | 1 +
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libtransmission/web.c | 3 ++
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7 files changed, 121 insertions(+), 9 deletions(-)
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diff --git a/libtransmission/quark.c b/libtransmission/quark.c
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index 30cc2bca4..b4fd7aabd 100644
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--- a/libtransmission/quark.c
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+++ b/libtransmission/quark.c
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@@ -289,6 +289,8 @@ static const struct tr_key_struct my_static[] =
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{ "rpc-authentication-required", 27 },
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{ "rpc-bind-address", 16 },
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{ "rpc-enabled", 11 },
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+ { "rpc-host-whitelist", 18 },
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+ { "rpc-host-whitelist-enabled", 26 },
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{ "rpc-password", 12 },
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{ "rpc-port", 8 },
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{ "rpc-url", 7 },
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diff --git a/libtransmission/quark.h b/libtransmission/quark.h
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index 7f5212733..17464be8f 100644
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--- a/libtransmission/quark.h
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+++ b/libtransmission/quark.h
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@@ -291,6 +291,8 @@ enum
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TR_KEY_rpc_authentication_required,
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TR_KEY_rpc_bind_address,
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TR_KEY_rpc_enabled,
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+ TR_KEY_rpc_host_whitelist,
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+ TR_KEY_rpc_host_whitelist_enabled,
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TR_KEY_rpc_password,
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TR_KEY_rpc_port,
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TR_KEY_rpc_url,
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diff --git a/libtransmission/rpc-server.c b/libtransmission/rpc-server.c
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index a3485f3fa..292cd5fce 100644
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--- a/libtransmission/rpc-server.c
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+++ b/libtransmission/rpc-server.c
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@@ -52,6 +52,7 @@ struct tr_rpc_server
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bool isEnabled;
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bool isPasswordEnabled;
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bool isWhitelistEnabled;
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+ bool isHostWhitelistEnabled;
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tr_port port;
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char * url;
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struct in_addr bindAddress;
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@@ -63,6 +64,7 @@ struct tr_rpc_server
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char * password;
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char * whitelistStr;
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tr_list * whitelist;
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+ tr_list * hostWhitelist;
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char * sessionId;
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time_t sessionIdExpiresAt;
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@@ -588,6 +590,49 @@ isAddressAllowed (const tr_rpc_server * server, const char * address)
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return false;
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}
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+static bool isHostnameAllowed(tr_rpc_server const* server, struct evhttp_request* req)
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+{
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+ /* If password auth is enabled, any hostname is permitted. */
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+ if (server->isPasswordEnabled)
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+ {
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+ return true;
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+ }
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+
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+ char const* const host = evhttp_find_header(req->input_headers, "Host");
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+
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+ // If whitelist is disabled, no restrictions.
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+ if (!server->isHostWhitelistEnabled)
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+ return true;
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+
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+ /* No host header, invalid request. */
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+ if (host == NULL)
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+ {
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+ return false;
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+ }
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+
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+ /* Host header might include the port. */
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+ char* const hostname = tr_strndup(host, strcspn(host, ":"));
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+
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+ /* localhost or ipaddress is always acceptable. */
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+ if (strcmp(hostname, "localhost") == 0 || strcmp(hostname, "localhost.") == 0 || tr_addressIsIP(hostname))
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+ {
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+ tr_free(hostname);
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+ return true;
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+ }
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+
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+ /* Otherwise, hostname must be whitelisted. */
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+ for (tr_list* l = server->hostWhitelist; l != NULL; l = l->next) {
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+ if (tr_wildmat(hostname, l->data))
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+ {
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+ tr_free(hostname);
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+ return true;
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+ }
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+ }
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+
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+ tr_free(hostname);
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+ return false;
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+}
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+
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static bool
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test_session_id (struct tr_rpc_server * server, struct evhttp_request * req)
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{
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@@ -663,6 +708,23 @@ handle_request (struct evhttp_request * req, void * arg)
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handle_upload (req, server);
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}
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#ifdef REQUIRE_SESSION_ID
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+ else if (!isHostnameAllowed(server, req))
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+ {
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+ char* tmp = tr_strdup_printf(
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+ "<p>Transmission received your request, but the hostname was unrecognized.</p>"
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+ "<p>To fix this, choose one of the following options:"
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+ "<ul>"
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+ "<li>Enable password authentication, then any hostname is allowed.</li>"
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+ "<li>Add the hostname you want to use to the whitelist in settings.</li>"
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+ "</ul></p>"
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+ "<p>If you're editing settings.json, see the 'rpc-host-whitelist' and 'rpc-host-whitelist-enabled' entries.</p>"
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+ "<p>This requirement has been added to help prevent "
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+ "<a href=\"https://en.wikipedia.org/wiki/DNS_rebinding\">DNS Rebinding</a> "
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+ "attacks.</p>");
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+ send_simple_response(req, 421, tmp);
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+ tr_free(tmp);
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+ }
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+
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else if (!test_session_id (server, req))
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{
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const char * sessionId = get_current_session_id (server);
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@@ -674,7 +736,7 @@ handle_request (struct evhttp_request * req, void * arg)
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"<li> When you get this 409 error message, resend your request with the updated header"
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"</ol></p>"
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"<p>This requirement has been added to help prevent "
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- "<a href=\"http://en.wikipedia.org/wiki/Cross-site_request_forgery\">CSRF</a> "
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+ "<a href=\"https://en.wikipedia.org/wiki/Cross-site_request_forgery\">CSRF</a> "
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"attacks.</p>"
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"<p><code>%s: %s</code></p>",
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TR_RPC_SESSION_ID_HEADER, sessionId);
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@@ -875,19 +937,14 @@ tr_rpcGetUrl (const tr_rpc_server * server)
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return server->url ? server->url : "";
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}
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-void
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-tr_rpcSetWhitelist (tr_rpc_server * server, const char * whitelistStr)
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+static void
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+tr_rpcSetList (char const* whitelistStr, tr_list** list)
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{
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void * tmp;
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const char * walk;
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- /* keep the string */
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- tmp = server->whitelistStr;
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- server->whitelistStr = tr_strdup (whitelistStr);
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- tr_free (tmp);
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-
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/* clear out the old whitelist entries */
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- while ((tmp = tr_list_pop_front (&server->whitelist)))
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+ while ((tmp = tr_list_pop_front (list)) != NULL)
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tr_free (tmp);
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/* build the new whitelist entries */
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@@ -896,7 +953,7 @@ tr_rpcSetWhitelist (tr_rpc_server * server, const char * whitelistStr)
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const char * delimiters = " ,;";
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const size_t len = strcspn (walk, delimiters);
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char * token = tr_strndup (walk, len);
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- tr_list_append (&server->whitelist, token);
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+ tr_list_append (list, token);
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if (strcspn (token, "+-") < len)
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tr_logAddNamedInfo (MY_NAME, "Adding address to whitelist: %s (And it has a '+' or '-'! Are you using an old ACL by mistake?)", token);
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else
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@@ -909,6 +966,21 @@ tr_rpcSetWhitelist (tr_rpc_server * server, const char * whitelistStr)
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}
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}
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+void tr_rpcSetHostWhitelist(tr_rpc_server* server, char const* whitelistStr)
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+{
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+ tr_rpcSetList(whitelistStr, &server->hostWhitelist);
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+}
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+
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+void tr_rpcSetWhitelist(tr_rpc_server* server, char const* whitelistStr)
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+{
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+ /* keep the string */
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+ char* const tmp = server->whitelistStr;
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+ server->whitelistStr = tr_strdup(whitelistStr);
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+ tr_free(tmp);
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+
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+ tr_rpcSetList(whitelistStr, &server->whitelist);
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+}
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+
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const char*
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tr_rpcGetWhitelist (const tr_rpc_server * server)
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{
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@@ -930,6 +1002,11 @@ tr_rpcGetWhitelistEnabled (const tr_rpc_server * server)
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return server->isWhitelistEnabled;
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}
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+void tr_rpcSetHostWhitelistEnabled(tr_rpc_server* server, bool isEnabled)
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+{
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+ server->isHostWhitelistEnabled = isEnabled;
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+}
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+
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/****
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***** PASSWORD
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****/
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@@ -1063,6 +1140,28 @@ tr_rpcInit (tr_session * session, tr_variant * settings)
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else
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tr_rpcSetWhitelistEnabled (s, boolVal);
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+ key = TR_KEY_rpc_host_whitelist_enabled;
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+
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+ if (!tr_variantDictFindBool(settings, key, &boolVal))
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+ {
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+ missing_settings_key(key);
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+ }
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+ else
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+ {
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+ tr_rpcSetHostWhitelistEnabled(s, boolVal);
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+ }
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+
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+ key = TR_KEY_rpc_host_whitelist;
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+
|
|
||||||
+ if (!tr_variantDictFindStr(settings, key, &str, NULL) && str != NULL)
|
|
||||||
+ {
|
|
||||||
+ missing_settings_key(key);
|
|
||||||
+ }
|
|
||||||
+ else
|
|
||||||
+ {
|
|
||||||
+ tr_rpcSetHostWhitelist(s, str);
|
|
||||||
+ }
|
|
||||||
+
|
|
||||||
key = TR_KEY_rpc_authentication_required;
|
|
||||||
if (!tr_variantDictFindBool (settings, key, &boolVal))
|
|
||||||
missing_settings_key (key);
|
|
||||||
diff --git a/libtransmission/rpc-server.h b/libtransmission/rpc-server.h
|
|
||||||
index e0302c5ea..8c9e6b24e 100644
|
|
||||||
--- a/libtransmission/rpc-server.h
|
|
||||||
+++ b/libtransmission/rpc-server.h
|
|
||||||
@@ -49,6 +49,10 @@ void tr_rpcSetWhitelist (tr_rpc_server * server,
|
|
||||||
|
|
||||||
const char* tr_rpcGetWhitelist (const tr_rpc_server * server);
|
|
||||||
|
|
||||||
+void tr_rpcSetHostWhitelistEnabled(tr_rpc_server* server, bool isEnabled);
|
|
||||||
+
|
|
||||||
+void tr_rpcSetHostWhitelist(tr_rpc_server* server, char const* whitelist);
|
|
||||||
+
|
|
||||||
void tr_rpcSetPassword (tr_rpc_server * server,
|
|
||||||
const char * password);
|
|
||||||
|
|
||||||
diff --git a/libtransmission/session.c b/libtransmission/session.c
|
|
||||||
index 844cadba8..58b717913 100644
|
|
||||||
--- a/libtransmission/session.c
|
|
||||||
+++ b/libtransmission/session.c
|
|
||||||
@@ -359,6 +359,8 @@ tr_sessionGetDefaultSettings (tr_variant * d)
|
|
||||||
tr_variantDictAddStr (d, TR_KEY_rpc_username, "");
|
|
||||||
tr_variantDictAddStr (d, TR_KEY_rpc_whitelist, TR_DEFAULT_RPC_WHITELIST);
|
|
||||||
tr_variantDictAddBool (d, TR_KEY_rpc_whitelist_enabled, true);
|
|
||||||
+ tr_variantDictAddStr(d, TR_KEY_rpc_host_whitelist, TR_DEFAULT_RPC_HOST_WHITELIST);
|
|
||||||
+ tr_variantDictAddBool(d, TR_KEY_rpc_host_whitelist_enabled, true);
|
|
||||||
tr_variantDictAddInt (d, TR_KEY_rpc_port, atoi (TR_DEFAULT_RPC_PORT_STR));
|
|
||||||
tr_variantDictAddStr (d, TR_KEY_rpc_url, TR_DEFAULT_RPC_URL_STR);
|
|
||||||
tr_variantDictAddBool (d, TR_KEY_scrape_paused_torrents_enabled, true);
|
|
||||||
diff --git a/libtransmission/transmission.h b/libtransmission/transmission.h
|
|
||||||
index 4f76adfd6..e213a8f4e 100644
|
|
||||||
--- a/libtransmission/transmission.h
|
|
||||||
+++ b/libtransmission/transmission.h
|
|
||||||
@@ -123,6 +123,7 @@ const char* tr_getDefaultDownloadDir (void);
|
|
||||||
#define TR_DEFAULT_BIND_ADDRESS_IPV4 "0.0.0.0"
|
|
||||||
#define TR_DEFAULT_BIND_ADDRESS_IPV6 "::"
|
|
||||||
#define TR_DEFAULT_RPC_WHITELIST "127.0.0.1"
|
|
||||||
+#define TR_DEFAULT_RPC_HOST_WHITELIST ""
|
|
||||||
#define TR_DEFAULT_RPC_PORT_STR "9091"
|
|
||||||
#define TR_DEFAULT_RPC_URL_STR "/transmission/"
|
|
||||||
#define TR_DEFAULT_PEER_PORT_STR "51413"
|
|
||||||
diff --git a/libtransmission/web.c b/libtransmission/web.c
|
|
||||||
index ee495e9fc..c7f062730 100644
|
|
||||||
--- a/libtransmission/web.c
|
|
||||||
+++ b/libtransmission/web.c
|
|
||||||
@@ -594,6 +594,7 @@ tr_webGetResponseStr (long code)
|
|
||||||
case 415: return "Unsupported Media Type";
|
|
||||||
case 416: return "Requested Range Not Satisfiable";
|
|
||||||
case 417: return "Expectation Failed";
|
|
||||||
+ case 421: return "Misdirected Request";
|
|
||||||
case 500: return "Internal Server Error";
|
|
||||||
case 501: return "Not Implemented";
|
|
||||||
case 502: return "Bad Gateway";
|
|
||||||
Loading…
Reference in new issue