[2ff2076] | 1 | /***************************************************************************\ |
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| 2 | * * |
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| 3 | * BitlBee - An IRC to IM gateway * |
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| 4 | * Jabber module - SOCKS5 Bytestreams ( XEP-0065 ) * |
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| 5 | * * |
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| 6 | * Copyright 2007 Uli Meis <a.sporto+bee@gmail.com> * |
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| 7 | * * |
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| 8 | * This program is free software; you can redistribute it and/or modify * |
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| 9 | * it under the terms of the GNU General Public License as published by * |
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| 10 | * the Free Software Foundation; either version 2 of the License, or * |
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| 11 | * (at your option) any later version. * |
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| 12 | * * |
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| 13 | * This program is distributed in the hope that it will be useful, * |
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| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of * |
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| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
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| 16 | * GNU General Public License for more details. * |
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| 17 | * * |
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| 18 | * You should have received a copy of the GNU General Public License along * |
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| 19 | * with this program; if not, write to the Free Software Foundation, Inc., * |
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| 20 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. * |
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| 21 | * * |
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| 22 | \***************************************************************************/ |
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| 23 | |
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| 24 | #include "jabber.h" |
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| 25 | #include "sha1.h" |
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[a02f34f] | 26 | #include "lib/ftutil.h" |
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[2ff2076] | 27 | #include <poll.h> |
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| 28 | |
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| 29 | struct bs_transfer { |
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| 30 | |
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| 31 | struct jabber_transfer *tf; |
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| 32 | |
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[dc0ba9c] | 33 | jabber_streamhost_t *sh; |
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| 34 | GSList *streamhosts; |
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[2ff2076] | 35 | |
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| 36 | enum |
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| 37 | { |
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| 38 | BS_PHASE_CONNECT, |
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| 39 | BS_PHASE_CONNECTED, |
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| 40 | BS_PHASE_REQUEST, |
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| 41 | BS_PHASE_REPLY |
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| 42 | } phase; |
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| 43 | |
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| 44 | /* SHA1( SID + Initiator JID + Target JID) */ |
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| 45 | char *pseudoadr; |
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| 46 | |
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| 47 | gint connect_timeout; |
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| 48 | }; |
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| 49 | |
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| 50 | struct socks5_message |
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| 51 | { |
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| 52 | unsigned char ver; |
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| 53 | union |
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| 54 | { |
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| 55 | unsigned char cmd; |
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| 56 | unsigned char rep; |
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| 57 | } cmdrep; |
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| 58 | unsigned char rsv; |
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| 59 | unsigned char atyp; |
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| 60 | unsigned char addrlen; |
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| 61 | unsigned char address[40]; |
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| 62 | in_port_t port; |
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| 63 | } __attribute__ ((packed)); |
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| 64 | |
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[cce0450] | 65 | char *socks5_reply_code[] = { |
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| 66 | "succeeded", |
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| 67 | "general SOCKS server failure", |
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| 68 | "connection not allowed by ruleset", |
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| 69 | "Network unreachable", |
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| 70 | "Host unreachable", |
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| 71 | "Connection refused", |
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| 72 | "TTL expired", |
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| 73 | "Command not supported", |
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| 74 | "Address type not supported", |
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| 75 | "unassigned"}; |
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| 76 | |
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[2ff2076] | 77 | /* connect() timeout in seconds. */ |
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| 78 | #define JABBER_BS_CONTIMEOUT 15 |
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| 79 | /* listen timeout */ |
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| 80 | #define JABBER_BS_LISTEN_TIMEOUT 90 |
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| 81 | |
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| 82 | /* very useful */ |
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| 83 | #define ASSERTSOCKOP(op, msg) \ |
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| 84 | if( (op) == -1 ) \ |
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| 85 | return jabber_bs_abort( bt , msg ": %s", strerror( errno ) ); |
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| 86 | |
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| 87 | gboolean jabber_bs_abort( struct bs_transfer *bt, char *format, ... ); |
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| 88 | void jabber_bs_canceled( file_transfer_t *ft , char *reason ); |
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[dc0ba9c] | 89 | void jabber_bs_free_transfer( file_transfer_t *ft ); |
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[2ff2076] | 90 | gboolean jabber_bs_connect_timeout( gpointer data, gint fd, b_input_condition cond ); |
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| 91 | gboolean jabber_bs_poll( struct bs_transfer *bt, int fd, short *revents ); |
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| 92 | gboolean jabber_bs_peek( struct bs_transfer *bt, void *buffer, int buflen ); |
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| 93 | |
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| 94 | void jabber_bs_recv_answer_request( struct bs_transfer *bt ); |
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| 95 | gboolean jabber_bs_recv_read( gpointer data, gint fd, b_input_condition cond ); |
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[dce3903] | 96 | gboolean jabber_bs_recv_write_request( file_transfer_t *ft ); |
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[2ff2076] | 97 | gboolean jabber_bs_recv_handshake( gpointer data, gint fd, b_input_condition cond ); |
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| 98 | gboolean jabber_bs_recv_handshake_abort( struct bs_transfer *bt, char *error ); |
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[dc0ba9c] | 99 | int jabber_bs_recv_request( struct im_connection *ic, struct xt_node *node, struct xt_node *qnode ); |
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[2ff2076] | 100 | |
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| 101 | gboolean jabber_bs_send_handshake_abort( struct bs_transfer *bt, char *error ); |
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[dc0ba9c] | 102 | gboolean jabber_bs_send_request( struct jabber_transfer *tf, GSList *streamhosts ); |
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[2ff2076] | 103 | gboolean jabber_bs_send_handshake( gpointer data, gint fd, b_input_condition cond ); |
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[dc0ba9c] | 104 | static xt_status jabber_bs_send_handle_activate( struct im_connection *ic, struct xt_node *node, struct xt_node *orig ); |
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| 105 | void jabber_bs_send_activate( struct bs_transfer *bt ); |
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[2ff2076] | 106 | |
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| 107 | /* |
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| 108 | * Frees a bs_transfer struct and calls the SI free function |
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| 109 | */ |
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| 110 | void jabber_bs_free_transfer( file_transfer_t *ft) { |
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| 111 | struct jabber_transfer *tf = ft->data; |
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| 112 | struct bs_transfer *bt = tf->streamhandle; |
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[dc0ba9c] | 113 | jabber_streamhost_t *sh; |
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[2ff2076] | 114 | |
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[2625d6d] | 115 | if ( bt->connect_timeout ) |
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| 116 | { |
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| 117 | b_event_remove( bt->connect_timeout ); |
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| 118 | bt->connect_timeout = 0; |
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| 119 | } |
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| 120 | |
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[2ff2076] | 121 | if ( tf->watch_in ) |
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| 122 | b_event_remove( tf->watch_in ); |
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| 123 | |
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| 124 | if( tf->watch_out ) |
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| 125 | b_event_remove( tf->watch_out ); |
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| 126 | |
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| 127 | g_free( bt->pseudoadr ); |
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[dc0ba9c] | 128 | |
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| 129 | while( bt->streamhosts ) |
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| 130 | { |
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| 131 | sh = bt->streamhosts->data; |
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| 132 | bt->streamhosts = g_slist_remove( bt->streamhosts, sh ); |
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| 133 | g_free( sh->jid ); |
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| 134 | g_free( sh->host ); |
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| 135 | g_free( sh ); |
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| 136 | } |
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| 137 | |
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[2ff2076] | 138 | g_free( bt ); |
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[dce3903] | 139 | |
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[2ff2076] | 140 | jabber_si_free_transfer( ft ); |
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| 141 | } |
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| 142 | |
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[dc0ba9c] | 143 | /* |
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| 144 | * Checks if buflen data is available on the socket and |
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| 145 | * writes it to buffer if that's the case. |
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| 146 | */ |
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[2ff2076] | 147 | gboolean jabber_bs_peek( struct bs_transfer *bt, void *buffer, int buflen ) |
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| 148 | { |
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| 149 | int ret; |
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| 150 | int fd = bt->tf->fd; |
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| 151 | |
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| 152 | ASSERTSOCKOP( ret = recv( fd, buffer, buflen, MSG_PEEK ), "MSG_PEEK'ing" ); |
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| 153 | |
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| 154 | if( ret == 0 ) |
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| 155 | return jabber_bs_abort( bt, "Remote end closed connection" ); |
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| 156 | |
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| 157 | if( ret < buflen ) |
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| 158 | return ret; |
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| 159 | |
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| 160 | ASSERTSOCKOP( ret = recv( fd, buffer, buflen, 0 ), "Dequeuing after MSG_PEEK" ); |
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| 161 | |
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| 162 | if( ret != buflen ) |
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| 163 | return jabber_bs_abort( bt, "recv returned less than previous recv with MSG_PEEK" ); |
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| 164 | |
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| 165 | return ret; |
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| 166 | } |
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| 167 | |
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| 168 | |
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| 169 | /* |
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| 170 | * This function is scheduled in bs_handshake via b_timeout_add after a (non-blocking) connect(). |
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| 171 | */ |
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| 172 | gboolean jabber_bs_connect_timeout( gpointer data, gint fd, b_input_condition cond ) |
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| 173 | { |
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| 174 | struct bs_transfer *bt = data; |
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| 175 | |
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| 176 | bt->connect_timeout = 0; |
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| 177 | |
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| 178 | jabber_bs_abort( bt, "no connection after %d seconds", bt->tf->ft->sending ? JABBER_BS_LISTEN_TIMEOUT : JABBER_BS_CONTIMEOUT ); |
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| 179 | |
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| 180 | return FALSE; |
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| 181 | } |
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| 182 | |
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[dc0ba9c] | 183 | /* |
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| 184 | * Polls the socket, checks for errors and removes a connect timer |
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| 185 | * if there is one. |
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| 186 | */ |
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[2ff2076] | 187 | gboolean jabber_bs_poll( struct bs_transfer *bt, int fd, short *revents ) |
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| 188 | { |
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| 189 | struct pollfd pfd = { .fd = fd, .events = POLLHUP|POLLERR }; |
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| 190 | |
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| 191 | if ( bt->connect_timeout ) |
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| 192 | { |
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| 193 | b_event_remove( bt->connect_timeout ); |
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| 194 | bt->connect_timeout = 0; |
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| 195 | } |
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| 196 | |
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| 197 | ASSERTSOCKOP( poll( &pfd, 1, 0 ), "poll()" ) |
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| 198 | |
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| 199 | if( pfd.revents & POLLERR ) |
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| 200 | { |
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| 201 | int sockerror; |
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| 202 | socklen_t errlen = sizeof( sockerror ); |
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| 203 | |
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| 204 | if ( getsockopt( fd, SOL_SOCKET, SO_ERROR, &sockerror, &errlen ) ) |
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| 205 | return jabber_bs_abort( bt, "getsockopt() failed, unknown socket error during SOCKS5 handshake (weird!)" ); |
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| 206 | |
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| 207 | if ( bt->phase == BS_PHASE_CONNECTED ) |
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| 208 | return jabber_bs_abort( bt, "connect failed: %s", strerror( sockerror ) ); |
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| 209 | |
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| 210 | return jabber_bs_abort( bt, "Socket error during SOCKS5 handshake(weird!): %s", strerror( sockerror ) ); |
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| 211 | } |
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| 212 | |
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| 213 | if( pfd.revents & POLLHUP ) |
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| 214 | return jabber_bs_abort( bt, "Remote end closed connection" ); |
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| 215 | |
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| 216 | *revents = pfd.revents; |
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| 217 | |
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| 218 | return TRUE; |
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| 219 | } |
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| 220 | |
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[dc0ba9c] | 221 | /* |
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| 222 | * Used for receive and send path. |
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| 223 | */ |
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[2ff2076] | 224 | gboolean jabber_bs_abort( struct bs_transfer *bt, char *format, ... ) |
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| 225 | { |
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| 226 | va_list params; |
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| 227 | va_start( params, format ); |
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| 228 | char error[128]; |
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| 229 | |
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| 230 | if( vsnprintf( error, 128, format, params ) < 0 ) |
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| 231 | sprintf( error, "internal error parsing error string (BUG)" ); |
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| 232 | va_end( params ); |
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| 233 | if( bt->tf->ft->sending ) |
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| 234 | return jabber_bs_send_handshake_abort( bt, error ); |
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[dc0ba9c] | 235 | else |
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| 236 | return jabber_bs_recv_handshake_abort( bt, error ); |
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[2ff2076] | 237 | } |
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| 238 | |
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| 239 | /* Bad luck */ |
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| 240 | void jabber_bs_canceled( file_transfer_t *ft , char *reason ) |
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| 241 | { |
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| 242 | struct jabber_transfer *tf = ft->data; |
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| 243 | |
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| 244 | imcb_log( tf->ic, "File transfer aborted: %s", reason ); |
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| 245 | } |
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| 246 | |
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| 247 | /* |
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| 248 | * Parses an incoming bytestream request and calls jabber_bs_handshake on success. |
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| 249 | */ |
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| 250 | int jabber_bs_recv_request( struct im_connection *ic, struct xt_node *node, struct xt_node *qnode) |
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| 251 | { |
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| 252 | char *sid, *ini_jid, *tgt_jid, *mode, *iq_id; |
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| 253 | struct jabber_data *jd = ic->proto_data; |
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| 254 | struct jabber_transfer *tf = NULL; |
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| 255 | GSList *tflist; |
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| 256 | struct bs_transfer *bt; |
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[dc0ba9c] | 257 | GSList *shlist=NULL; |
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| 258 | struct xt_node *shnode; |
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[2ff2076] | 259 | |
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| 260 | sha1_state_t sha; |
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| 261 | char hash_hex[41]; |
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| 262 | unsigned char hash[20]; |
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| 263 | int i; |
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| 264 | |
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| 265 | if( !(iq_id = xt_find_attr( node, "id" ) ) || |
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| 266 | !(ini_jid = xt_find_attr( node, "from" ) ) || |
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| 267 | !(tgt_jid = xt_find_attr( node, "to" ) ) || |
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| 268 | !(sid = xt_find_attr( qnode, "sid" ) ) ) |
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| 269 | { |
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| 270 | imcb_log( ic, "WARNING: Received incomplete SI bytestream request"); |
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| 271 | return XT_HANDLED; |
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| 272 | } |
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| 273 | |
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| 274 | if( ( mode = xt_find_attr( qnode, "mode" ) ) && |
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| 275 | ( strcmp( mode, "tcp" ) != 0 ) ) |
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| 276 | { |
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| 277 | imcb_log( ic, "WARNING: Received SI Request for unsupported bytestream mode %s", xt_find_attr( qnode, "mode" ) ); |
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| 278 | return XT_HANDLED; |
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| 279 | } |
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| 280 | |
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[dc0ba9c] | 281 | shnode = qnode->children; |
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| 282 | while( ( shnode = xt_find_node( shnode, "streamhost" ) ) ) |
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| 283 | { |
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| 284 | char *jid, *host; |
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| 285 | int port; |
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| 286 | if( ( jid = xt_find_attr( shnode, "jid" ) ) && |
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| 287 | ( host = xt_find_attr( shnode, "host" ) ) && |
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| 288 | ( ( port = atoi( xt_find_attr( shnode, "port" ) ) ) ) ) |
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| 289 | { |
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| 290 | jabber_streamhost_t *sh = g_new0( jabber_streamhost_t, 1 ); |
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| 291 | sh->jid = g_strdup(jid); |
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| 292 | sh->host = g_strdup(host); |
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| 293 | sprintf( sh->port, "%u", port ); |
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| 294 | shlist = g_slist_append( shlist, sh ); |
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| 295 | } |
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| 296 | shnode = shnode->next; |
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| 297 | } |
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| 298 | |
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| 299 | if( !shlist ) |
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| 300 | { |
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| 301 | imcb_log( ic, "WARNING: Received incomplete SI bytestream request, no parseable streamhost entries"); |
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| 302 | return XT_HANDLED; |
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| 303 | } |
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| 304 | |
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[2ff2076] | 305 | /* Let's see if we can find out what this bytestream should be for... */ |
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| 306 | |
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| 307 | for( tflist = jd->filetransfers ; tflist; tflist = g_slist_next(tflist) ) |
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| 308 | { |
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| 309 | struct jabber_transfer *tft = tflist->data; |
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| 310 | if( ( strcmp( tft->sid, sid ) == 0 ) && |
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| 311 | ( strcmp( tft->ini_jid, ini_jid ) == 0 ) && |
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| 312 | ( strcmp( tft->tgt_jid, tgt_jid ) == 0 ) ) |
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| 313 | { |
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| 314 | tf = tft; |
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| 315 | break; |
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| 316 | } |
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| 317 | } |
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| 318 | |
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| 319 | if (!tf) |
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| 320 | { |
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| 321 | imcb_log( ic, "WARNING: Received bytestream request from %s that doesn't match an SI request", ini_jid ); |
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| 322 | return XT_HANDLED; |
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| 323 | } |
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| 324 | |
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| 325 | /* iq_id and canceled can be reused since SI is done */ |
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| 326 | g_free( tf->iq_id ); |
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| 327 | tf->iq_id = g_strdup( iq_id ); |
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| 328 | |
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| 329 | tf->ft->canceled = jabber_bs_canceled; |
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| 330 | |
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| 331 | /* SHA1( SID + Initiator JID + Target JID ) is given to the streamhost which it will match against the initiator's value */ |
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| 332 | sha1_init( &sha ); |
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| 333 | sha1_append( &sha, (unsigned char*) sid, strlen( sid ) ); |
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| 334 | sha1_append( &sha, (unsigned char*) ini_jid, strlen( ini_jid ) ); |
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| 335 | sha1_append( &sha, (unsigned char*) tgt_jid, strlen( tgt_jid ) ); |
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| 336 | sha1_finish( &sha, hash ); |
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| 337 | |
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| 338 | for( i = 0; i < 20; i ++ ) |
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| 339 | sprintf( hash_hex + i * 2, "%02x", hash[i] ); |
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| 340 | |
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| 341 | bt = g_new0( struct bs_transfer, 1 ); |
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| 342 | bt->tf = tf; |
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[dc0ba9c] | 343 | bt->streamhosts = shlist; |
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| 344 | bt->sh = shlist->data; |
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[2ff2076] | 345 | bt->phase = BS_PHASE_CONNECT; |
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| 346 | bt->pseudoadr = g_strdup( hash_hex ); |
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| 347 | tf->streamhandle = bt; |
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| 348 | tf->ft->free = jabber_bs_free_transfer; |
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| 349 | |
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[8a90001] | 350 | jabber_bs_recv_handshake( bt, -1, 0 ); |
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[2ff2076] | 351 | |
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| 352 | return XT_HANDLED; |
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| 353 | } |
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[dc0ba9c] | 354 | |
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[2ff2076] | 355 | /* |
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| 356 | * This is what a protocol handshake can look like in cooperative multitasking :) |
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| 357 | * Might be confusing at first because it's called from different places and is recursing. |
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| 358 | * (places being the event thread, bs_request, bs_handshake_abort, and itself) |
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| 359 | * |
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| 360 | * All in all, it turned out quite nice :) |
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| 361 | */ |
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| 362 | gboolean jabber_bs_recv_handshake( gpointer data, gint fd, b_input_condition cond ) |
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| 363 | { |
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| 364 | |
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| 365 | struct bs_transfer *bt = data; |
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| 366 | short revents; |
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[6cac643] | 367 | int gret; |
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[2ff2076] | 368 | |
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[8a90001] | 369 | if ( ( fd != -1 ) && !jabber_bs_poll( bt, fd, &revents ) ) |
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[2ff2076] | 370 | return FALSE; |
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| 371 | |
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| 372 | switch( bt->phase ) |
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| 373 | { |
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| 374 | case BS_PHASE_CONNECT: |
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| 375 | { |
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| 376 | struct addrinfo hints, *rp; |
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| 377 | |
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[dc0ba9c] | 378 | memset( &hints, 0, sizeof( struct addrinfo ) ); |
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| 379 | hints.ai_socktype = SOCK_STREAM; |
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[2ff2076] | 380 | |
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[6cac643] | 381 | if ( ( gret = getaddrinfo( bt->sh->host, bt->sh->port, &hints, &rp ) ) != 0 ) |
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| 382 | return jabber_bs_abort( bt, "getaddrinfo() failed: %s", gai_strerror( gret ) ); |
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[2ff2076] | 383 | |
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[dc0ba9c] | 384 | ASSERTSOCKOP( bt->tf->fd = fd = socket( rp->ai_family, rp->ai_socktype, 0 ), "Opening socket" ); |
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[2ff2076] | 385 | |
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[dc0ba9c] | 386 | sock_make_nonblocking( fd ); |
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[2ff2076] | 387 | |
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[dc0ba9c] | 388 | imcb_log( bt->tf->ic, "File %s: Connecting to streamhost %s:%s", bt->tf->ft->file_name, bt->sh->host, bt->sh->port ); |
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[2ff2076] | 389 | |
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[dc0ba9c] | 390 | if( ( connect( fd, rp->ai_addr, rp->ai_addrlen ) == -1 ) && |
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| 391 | ( errno != EINPROGRESS ) ) |
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| 392 | return jabber_bs_abort( bt , "connect() failed: %s", strerror( errno ) ); |
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[2ff2076] | 393 | |
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[dc0ba9c] | 394 | freeaddrinfo( rp ); |
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[2ff2076] | 395 | |
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[dc0ba9c] | 396 | bt->phase = BS_PHASE_CONNECTED; |
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| 397 | |
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| 398 | bt->tf->watch_out = b_input_add( fd, GAIM_INPUT_WRITE, jabber_bs_recv_handshake, bt ); |
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[2ff2076] | 399 | |
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[dc0ba9c] | 400 | /* since it takes forever(3mins?) till connect() fails on itself we schedule a timeout */ |
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| 401 | bt->connect_timeout = b_timeout_add( JABBER_BS_CONTIMEOUT * 1000, jabber_bs_connect_timeout, bt ); |
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[2ff2076] | 402 | |
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[dc0ba9c] | 403 | bt->tf->watch_in = 0; |
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| 404 | return FALSE; |
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[2ff2076] | 405 | } |
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| 406 | case BS_PHASE_CONNECTED: |
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| 407 | { |
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| 408 | struct { |
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| 409 | unsigned char ver; |
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| 410 | unsigned char nmethods; |
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| 411 | unsigned char method; |
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| 412 | } socks5_hello = { |
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| 413 | .ver = 5, |
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| 414 | .nmethods = 1, |
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| 415 | .method = 0x00 /* no auth */ |
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| 416 | /* one could also implement username/password. If you know |
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| 417 | * a jabber client or proxy that actually does it, tell me. |
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| 418 | */ |
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| 419 | }; |
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| 420 | |
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| 421 | ASSERTSOCKOP( send( fd, &socks5_hello, sizeof( socks5_hello ) , 0 ), "Sending auth request" ); |
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| 422 | |
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| 423 | bt->phase = BS_PHASE_REQUEST; |
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| 424 | |
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| 425 | bt->tf->watch_in = b_input_add( fd, GAIM_INPUT_READ, jabber_bs_recv_handshake, bt ); |
---|
| 426 | |
---|
| 427 | bt->tf->watch_out = 0; |
---|
| 428 | return FALSE; |
---|
| 429 | } |
---|
| 430 | case BS_PHASE_REQUEST: |
---|
| 431 | { |
---|
| 432 | struct socks5_message socks5_connect = |
---|
| 433 | { |
---|
| 434 | .ver = 5, |
---|
| 435 | .cmdrep.cmd = 0x01, |
---|
| 436 | .rsv = 0, |
---|
| 437 | .atyp = 0x03, |
---|
| 438 | .addrlen = strlen( bt->pseudoadr ), |
---|
| 439 | .port = 0 |
---|
| 440 | }; |
---|
| 441 | int ret; |
---|
| 442 | char buf[2]; |
---|
| 443 | |
---|
| 444 | /* If someone's trying to be funny and sends only one byte at a time we'll fail :) */ |
---|
| 445 | ASSERTSOCKOP( ret = recv( fd, buf, 2, 0 ) , "Receiving auth reply" ); |
---|
| 446 | |
---|
| 447 | if( !( ret == 2 ) || |
---|
| 448 | !( buf[0] == 5 ) || |
---|
| 449 | !( buf[1] == 0 ) ) |
---|
| 450 | return jabber_bs_abort( bt, "Auth not accepted by streamhost (reply: len=%d, ver=%d, status=%d)", |
---|
| 451 | ret, buf[0], buf[1] ); |
---|
| 452 | |
---|
| 453 | /* copy hash into connect message */ |
---|
| 454 | memcpy( socks5_connect.address, bt->pseudoadr, socks5_connect.addrlen ); |
---|
| 455 | |
---|
| 456 | ASSERTSOCKOP( send( fd, &socks5_connect, sizeof( struct socks5_message ), 0 ) , "Sending SOCKS5 Connect" ); |
---|
| 457 | |
---|
| 458 | bt->phase = BS_PHASE_REPLY; |
---|
| 459 | |
---|
| 460 | return TRUE; |
---|
| 461 | } |
---|
| 462 | case BS_PHASE_REPLY: |
---|
| 463 | { |
---|
| 464 | struct socks5_message socks5_reply; |
---|
| 465 | int ret; |
---|
| 466 | |
---|
| 467 | if ( !( ret = jabber_bs_peek( bt, &socks5_reply, sizeof( struct socks5_message ) ) ) ) |
---|
| 468 | return FALSE; |
---|
| 469 | |
---|
[29c1456] | 470 | if ( ret < 5 ) /* header up to address length */ |
---|
[2ff2076] | 471 | return TRUE; |
---|
[29c1456] | 472 | else if( ret < sizeof( struct socks5_message ) ) |
---|
| 473 | { |
---|
| 474 | /* Either a buggy proxy or just one that doesnt regard the SHOULD in XEP-0065 |
---|
| 475 | * saying the reply SHOULD contain the address */ |
---|
| 476 | |
---|
| 477 | ASSERTSOCKOP( ret = recv( fd, &socks5_reply, ret, 0 ), "Dequeuing after MSG_PEEK" ); |
---|
| 478 | } |
---|
[2ff2076] | 479 | |
---|
| 480 | if( !( socks5_reply.ver == 5 ) || |
---|
[cce0450] | 481 | !( socks5_reply.cmdrep.rep == 0 ) ) { |
---|
| 482 | char errstr[128] = ""; |
---|
| 483 | if( ( socks5_reply.ver == 5 ) && ( socks5_reply.cmdrep.rep < |
---|
| 484 | ( sizeof( socks5_reply_code ) / sizeof( socks5_reply_code[0] ) ) ) ) { |
---|
| 485 | sprintf( errstr, "with \"%s\" ", socks5_reply_code[ socks5_reply.cmdrep.rep ] ); |
---|
| 486 | } |
---|
| 487 | return jabber_bs_abort( bt, "SOCKS5 CONNECT failed %s(reply: ver=%d, rep=%d, atyp=%d, addrlen=%d)", |
---|
| 488 | errstr, |
---|
[2ff2076] | 489 | socks5_reply.ver, |
---|
| 490 | socks5_reply.cmdrep.rep, |
---|
| 491 | socks5_reply.atyp, |
---|
| 492 | socks5_reply.addrlen); |
---|
[cce0450] | 493 | } |
---|
[29c1456] | 494 | |
---|
| 495 | /* usually a proxy sends back the 40 bytes address but I encountered at least one (of jabber.cz) |
---|
| 496 | * that sends atyp=0 addrlen=0 and only 6 bytes (one less than one would expect). |
---|
| 497 | * Therefore I removed the wait for more bytes. Since we don't care about what else the proxy |
---|
| 498 | * is sending, it shouldnt matter */ |
---|
[2ff2076] | 499 | |
---|
[dc0ba9c] | 500 | if( bt->tf->ft->sending ) |
---|
| 501 | jabber_bs_send_activate( bt ); |
---|
| 502 | else |
---|
| 503 | jabber_bs_recv_answer_request( bt ); |
---|
[2ff2076] | 504 | |
---|
| 505 | return FALSE; |
---|
| 506 | } |
---|
| 507 | default: |
---|
| 508 | /* BUG */ |
---|
| 509 | imcb_log( bt->tf->ic, "BUG in file transfer code: undefined handshake phase" ); |
---|
| 510 | |
---|
| 511 | bt->tf->watch_in = 0; |
---|
| 512 | return FALSE; |
---|
| 513 | } |
---|
| 514 | } |
---|
| 515 | |
---|
| 516 | /* |
---|
| 517 | * If the handshake failed we can try the next streamhost, if there is one. |
---|
| 518 | * An intelligent sender would probably specify himself as the first streamhost and |
---|
[dce3903] | 519 | * a proxy as the second (Kopete and PSI are examples here). That way, a (potentially) |
---|
| 520 | * slow proxy is only used if neccessary. This of course also means, that the timeout |
---|
| 521 | * per streamhost should be kept short. If one or two firewalled adresses are specified, |
---|
| 522 | * they have to timeout first before a proxy is tried. |
---|
[2ff2076] | 523 | */ |
---|
| 524 | gboolean jabber_bs_recv_handshake_abort( struct bs_transfer *bt, char *error ) |
---|
| 525 | { |
---|
| 526 | struct jabber_transfer *tf = bt->tf; |
---|
| 527 | struct xt_node *reply, *iqnode; |
---|
[dc0ba9c] | 528 | GSList *shlist; |
---|
| 529 | |
---|
| 530 | imcb_log( tf->ic, "Transferring file %s: connection to streamhost %s:%s failed (%s)", |
---|
| 531 | tf->ft->file_name, |
---|
| 532 | bt->sh->host, |
---|
| 533 | bt->sh->port, |
---|
| 534 | error ); |
---|
[2ff2076] | 535 | |
---|
[dc0ba9c] | 536 | /* Alright, this streamhost failed, let's try the next... */ |
---|
| 537 | bt->phase = BS_PHASE_CONNECT; |
---|
| 538 | shlist = g_slist_find( bt->streamhosts, bt->sh ); |
---|
| 539 | if( shlist && shlist->next ) |
---|
[2ff2076] | 540 | { |
---|
[dc0ba9c] | 541 | bt->sh = shlist->next->data; |
---|
[8a90001] | 542 | return jabber_bs_recv_handshake( bt, -1, 0 ); |
---|
[2ff2076] | 543 | } |
---|
| 544 | |
---|
[dc0ba9c] | 545 | |
---|
[2ff2076] | 546 | /* out of stream hosts */ |
---|
| 547 | |
---|
| 548 | iqnode = jabber_make_packet( "iq", "result", tf->ini_jid, NULL ); |
---|
| 549 | reply = jabber_make_error_packet( iqnode, "item-not-found", "cancel" , "404" ); |
---|
| 550 | xt_free_node( iqnode ); |
---|
| 551 | |
---|
| 552 | xt_add_attr( reply, "id", tf->iq_id ); |
---|
| 553 | |
---|
| 554 | if( !jabber_write_packet( tf->ic, reply ) ) |
---|
| 555 | imcb_log( tf->ic, "WARNING: Error transmitting bytestream response" ); |
---|
| 556 | xt_free_node( reply ); |
---|
| 557 | |
---|
| 558 | imcb_file_canceled( tf->ft, "couldn't connect to any streamhosts" ); |
---|
| 559 | |
---|
| 560 | bt->tf->watch_in = 0; |
---|
| 561 | return FALSE; |
---|
| 562 | } |
---|
| 563 | |
---|
| 564 | /* |
---|
| 565 | * After the SOCKS5 handshake succeeds we need to inform the initiator which streamhost we chose. |
---|
| 566 | * If he is the streamhost himself, he might already know that. However, if it's a proxy, |
---|
| 567 | * the initiator will have to make a connection himself. |
---|
| 568 | */ |
---|
| 569 | void jabber_bs_recv_answer_request( struct bs_transfer *bt ) |
---|
| 570 | { |
---|
| 571 | struct jabber_transfer *tf = bt->tf; |
---|
| 572 | struct xt_node *reply; |
---|
| 573 | |
---|
[dce3903] | 574 | imcb_log( tf->ic, "File %s: established SOCKS5 connection to %s:%s", |
---|
[2ff2076] | 575 | tf->ft->file_name, |
---|
[dc0ba9c] | 576 | bt->sh->host, |
---|
| 577 | bt->sh->port ); |
---|
[2ff2076] | 578 | |
---|
| 579 | tf->ft->data = tf; |
---|
[dce3903] | 580 | tf->watch_in = b_input_add( tf->fd, GAIM_INPUT_READ, jabber_bs_recv_read, bt ); |
---|
| 581 | tf->ft->write_request = jabber_bs_recv_write_request; |
---|
[2ff2076] | 582 | |
---|
| 583 | reply = xt_new_node( "streamhost-used", NULL, NULL ); |
---|
[dc0ba9c] | 584 | xt_add_attr( reply, "jid", bt->sh->jid ); |
---|
[2ff2076] | 585 | |
---|
| 586 | reply = xt_new_node( "query", NULL, reply ); |
---|
| 587 | xt_add_attr( reply, "xmlns", XMLNS_BYTESTREAMS ); |
---|
| 588 | |
---|
| 589 | reply = jabber_make_packet( "iq", "result", tf->ini_jid, reply ); |
---|
| 590 | |
---|
| 591 | xt_add_attr( reply, "id", tf->iq_id ); |
---|
| 592 | |
---|
| 593 | if( !jabber_write_packet( tf->ic, reply ) ) |
---|
| 594 | imcb_file_canceled( tf->ft, "Error transmitting bytestream response" ); |
---|
| 595 | xt_free_node( reply ); |
---|
| 596 | } |
---|
| 597 | |
---|
[dce3903] | 598 | /* |
---|
| 599 | * This function is called from write_request directly. If no data is available, it will install itself |
---|
| 600 | * as a watcher for input on fd and once that happens, deliver the data and unschedule itself again. |
---|
| 601 | */ |
---|
[2ff2076] | 602 | gboolean jabber_bs_recv_read( gpointer data, gint fd, b_input_condition cond ) |
---|
| 603 | { |
---|
| 604 | int ret; |
---|
[dce3903] | 605 | struct bs_transfer *bt = data; |
---|
| 606 | struct jabber_transfer *tf = bt->tf; |
---|
[2ff2076] | 607 | |
---|
[8a90001] | 608 | if( fd != -1 ) /* called via event thread */ |
---|
[dce3903] | 609 | { |
---|
| 610 | tf->watch_in = 0; |
---|
| 611 | ASSERTSOCKOP( ret = recv( fd, tf->ft->buffer, sizeof( tf->ft->buffer ), 0 ) , "Receiving" ); |
---|
| 612 | } |
---|
| 613 | else |
---|
[2ff2076] | 614 | { |
---|
[dce3903] | 615 | /* called directly. There might not be any data available. */ |
---|
| 616 | if( ( ( ret = recv( tf->fd, tf->ft->buffer, sizeof( tf->ft->buffer ), 0 ) ) == -1 ) && |
---|
| 617 | ( errno != EAGAIN ) ) |
---|
| 618 | return jabber_bs_abort( bt, "Receiving: %s", strerror( errno ) ); |
---|
| 619 | |
---|
| 620 | if( ( ret == -1 ) && ( errno == EAGAIN ) ) |
---|
[2ff2076] | 621 | { |
---|
[dce3903] | 622 | tf->watch_in = b_input_add( tf->fd, GAIM_INPUT_READ, jabber_bs_recv_read, bt ); |
---|
[2ff2076] | 623 | return FALSE; |
---|
| 624 | } |
---|
| 625 | } |
---|
| 626 | |
---|
[dce3903] | 627 | /* shouldn't happen since we know the file size */ |
---|
[2ff2076] | 628 | if( ret == 0 ) |
---|
[dce3903] | 629 | return jabber_bs_abort( bt, "Remote end closed connection" ); |
---|
[2ff2076] | 630 | |
---|
| 631 | tf->bytesread += ret; |
---|
| 632 | |
---|
[4ac647d] | 633 | if( tf->bytesread >= tf->ft->file_size ) |
---|
| 634 | imcb_file_finished( tf->ft ); |
---|
| 635 | |
---|
[dce3903] | 636 | tf->ft->write( tf->ft, tf->ft->buffer, ret ); |
---|
[2ff2076] | 637 | |
---|
[dce3903] | 638 | return FALSE; |
---|
[2ff2076] | 639 | } |
---|
| 640 | |
---|
[dce3903] | 641 | /* |
---|
| 642 | * imc callback that is invoked when it is ready to receive some data. |
---|
| 643 | */ |
---|
| 644 | gboolean jabber_bs_recv_write_request( file_transfer_t *ft ) |
---|
[2ff2076] | 645 | { |
---|
| 646 | struct jabber_transfer *tf = ft->data; |
---|
| 647 | |
---|
[dce3903] | 648 | if( tf->watch_in ) |
---|
| 649 | { |
---|
| 650 | imcb_file_canceled( ft, "BUG in jabber file transfer: write_request called when already watching for input" ); |
---|
| 651 | return FALSE; |
---|
| 652 | } |
---|
| 653 | |
---|
[8a90001] | 654 | jabber_bs_recv_read( tf->streamhandle, -1 , 0 ); |
---|
[2ff2076] | 655 | |
---|
[dce3903] | 656 | return TRUE; |
---|
[2ff2076] | 657 | } |
---|
| 658 | |
---|
[dce3903] | 659 | /* |
---|
| 660 | * Issues a write_request to imc. |
---|
| 661 | * */ |
---|
[2ff2076] | 662 | gboolean jabber_bs_send_can_write( gpointer data, gint fd, b_input_condition cond ) |
---|
| 663 | { |
---|
| 664 | struct bs_transfer *bt = data; |
---|
| 665 | |
---|
| 666 | bt->tf->watch_out = 0; |
---|
[dce3903] | 667 | |
---|
| 668 | bt->tf->ft->write_request( bt->tf->ft ); |
---|
| 669 | |
---|
[2ff2076] | 670 | return FALSE; |
---|
| 671 | } |
---|
| 672 | |
---|
[dce3903] | 673 | /* |
---|
| 674 | * This should only be called if we can write, so just do it. |
---|
| 675 | * Add a write watch so we can write more during the next cycle (if possible). |
---|
| 676 | */ |
---|
| 677 | gboolean jabber_bs_send_write( file_transfer_t *ft, char *buffer, unsigned int len ) |
---|
[2ff2076] | 678 | { |
---|
| 679 | struct jabber_transfer *tf = ft->data; |
---|
| 680 | struct bs_transfer *bt = tf->streamhandle; |
---|
| 681 | int ret; |
---|
| 682 | |
---|
[dce3903] | 683 | if( tf->watch_out ) |
---|
| 684 | return jabber_bs_abort( bt, "BUG: write() called while watching " ); |
---|
[2ff2076] | 685 | |
---|
[dc0ba9c] | 686 | /* TODO: catch broken pipe */ |
---|
[dce3903] | 687 | ASSERTSOCKOP( ret = send( tf->fd, buffer, len, 0 ), "Sending" ); |
---|
| 688 | |
---|
| 689 | tf->byteswritten += ret; |
---|
[2ff2076] | 690 | |
---|
[dce3903] | 691 | /* TODO: this should really not be fatal */ |
---|
| 692 | if( ret < len ) |
---|
| 693 | return jabber_bs_abort( bt, "send() sent %d instead of %d (send buffer too big!)", ret, len ); |
---|
| 694 | |
---|
[4ac647d] | 695 | if( tf->byteswritten >= ft->file_size ) |
---|
| 696 | imcb_file_finished( ft ); |
---|
| 697 | else |
---|
| 698 | bt->tf->watch_out = b_input_add( tf->fd, GAIM_INPUT_WRITE, jabber_bs_send_can_write, bt ); |
---|
[2ff2076] | 699 | |
---|
| 700 | return TRUE; |
---|
| 701 | } |
---|
| 702 | |
---|
[dce3903] | 703 | /* |
---|
| 704 | * Handles the reply by the receiver containing the used streamhost. |
---|
| 705 | */ |
---|
[2ff2076] | 706 | static xt_status jabber_bs_send_handle_reply(struct im_connection *ic, struct xt_node *node, struct xt_node *orig ) { |
---|
| 707 | struct jabber_transfer *tf = NULL; |
---|
| 708 | struct jabber_data *jd = ic->proto_data; |
---|
| 709 | struct bs_transfer *bt; |
---|
| 710 | GSList *tflist; |
---|
| 711 | struct xt_node *c; |
---|
| 712 | char *sid, *jid; |
---|
| 713 | |
---|
| 714 | if( !( c = xt_find_node( node->children, "query" ) ) || |
---|
| 715 | !( c = xt_find_node( c->children, "streamhost-used" ) ) || |
---|
| 716 | !( jid = xt_find_attr( c, "jid" ) ) ) |
---|
| 717 | |
---|
| 718 | { |
---|
| 719 | imcb_log( ic, "WARNING: Received incomplete bytestream reply" ); |
---|
| 720 | return XT_HANDLED; |
---|
| 721 | } |
---|
| 722 | |
---|
| 723 | if( !( c = xt_find_node( orig->children, "query" ) ) || |
---|
| 724 | !( sid = xt_find_attr( c, "sid" ) ) ) |
---|
| 725 | { |
---|
| 726 | imcb_log( ic, "WARNING: Error parsing request corresponding to the incoming bytestream reply" ); |
---|
| 727 | return XT_HANDLED; |
---|
| 728 | } |
---|
| 729 | |
---|
| 730 | /* Let's see if we can find out what this bytestream should be for... */ |
---|
| 731 | |
---|
| 732 | for( tflist = jd->filetransfers ; tflist; tflist = g_slist_next(tflist) ) |
---|
| 733 | { |
---|
| 734 | struct jabber_transfer *tft = tflist->data; |
---|
| 735 | if( ( strcmp( tft->sid, sid ) == 0 ) ) |
---|
| 736 | { |
---|
| 737 | tf = tft; |
---|
| 738 | break; |
---|
| 739 | } |
---|
| 740 | } |
---|
| 741 | |
---|
| 742 | if( !tf ) |
---|
| 743 | { |
---|
| 744 | imcb_log( ic, "WARNING: Received SOCKS5 bytestream reply to unknown request" ); |
---|
| 745 | return XT_HANDLED; |
---|
| 746 | } |
---|
| 747 | |
---|
| 748 | bt = tf->streamhandle; |
---|
| 749 | |
---|
| 750 | tf->accepted = TRUE; |
---|
| 751 | |
---|
[dc0ba9c] | 752 | if( strcmp( jid, tf->ini_jid ) == 0 ) |
---|
[2ff2076] | 753 | { |
---|
[dc0ba9c] | 754 | /* we're streamhost and target */ |
---|
| 755 | if( bt->phase == BS_PHASE_REPLY ) |
---|
| 756 | { |
---|
| 757 | /* handshake went through, let's start transferring */ |
---|
| 758 | tf->ft->write_request( tf->ft ); |
---|
| 759 | } |
---|
| 760 | } else |
---|
| 761 | { |
---|
[2625d6d] | 762 | /* using a proxy, abort listen */ |
---|
| 763 | |
---|
[8a90001] | 764 | if( tf->watch_in ) |
---|
[29c1456] | 765 | { |
---|
| 766 | b_event_remove( tf->watch_in ); |
---|
| 767 | tf->watch_in = 0; |
---|
| 768 | } |
---|
| 769 | |
---|
[8a90001] | 770 | if( tf->fd != -1 ) { |
---|
| 771 | closesocket( tf->fd ); |
---|
| 772 | tf->fd = -1; |
---|
| 773 | } |
---|
[2625d6d] | 774 | |
---|
| 775 | if ( bt->connect_timeout ) |
---|
| 776 | { |
---|
| 777 | b_event_remove( bt->connect_timeout ); |
---|
| 778 | bt->connect_timeout = 0; |
---|
| 779 | } |
---|
| 780 | |
---|
[dc0ba9c] | 781 | GSList *shlist; |
---|
| 782 | for( shlist = jd->streamhosts ; shlist ; shlist = g_slist_next( shlist ) ) |
---|
| 783 | { |
---|
| 784 | jabber_streamhost_t *sh = shlist->data; |
---|
| 785 | if( strcmp( sh->jid, jid ) == 0 ) |
---|
| 786 | { |
---|
| 787 | bt->sh = sh; |
---|
[8a90001] | 788 | jabber_bs_recv_handshake( bt, -1, 0 ); |
---|
[dc0ba9c] | 789 | return XT_HANDLED; |
---|
| 790 | } |
---|
| 791 | } |
---|
| 792 | |
---|
| 793 | imcb_log( ic, "WARNING: Received SOCKS5 bytestream reply with unknown streamhost %s", jid ); |
---|
[2ff2076] | 794 | } |
---|
| 795 | |
---|
| 796 | return XT_HANDLED; |
---|
| 797 | } |
---|
| 798 | |
---|
[dc0ba9c] | 799 | /* |
---|
| 800 | * Tell the proxy to activate the stream. Looks like this: |
---|
| 801 | * |
---|
| 802 | * <iq type=set> |
---|
| 803 | * <query xmlns=bs sid=sid> |
---|
| 804 | * <activate>tgt_jid</activate> |
---|
| 805 | * </query> |
---|
| 806 | * </iq> |
---|
| 807 | */ |
---|
| 808 | void jabber_bs_send_activate( struct bs_transfer *bt ) |
---|
| 809 | { |
---|
| 810 | struct xt_node *node; |
---|
| 811 | |
---|
| 812 | node = xt_new_node( "activate", bt->tf->tgt_jid, NULL ); |
---|
| 813 | node = xt_new_node( "query", NULL, node ); |
---|
| 814 | xt_add_attr( node, "xmlns", XMLNS_BYTESTREAMS ); |
---|
| 815 | xt_add_attr( node, "sid", bt->tf->sid ); |
---|
| 816 | node = jabber_make_packet( "iq", "set", bt->sh->jid, node ); |
---|
| 817 | |
---|
| 818 | jabber_cache_add( bt->tf->ic, node, jabber_bs_send_handle_activate ); |
---|
| 819 | |
---|
| 820 | jabber_write_packet( bt->tf->ic, node ); |
---|
| 821 | } |
---|
| 822 | |
---|
| 823 | /* |
---|
| 824 | * The proxy has activated the bytestream. |
---|
| 825 | * We can finally start pushing some data out. |
---|
| 826 | */ |
---|
| 827 | static xt_status jabber_bs_send_handle_activate( struct im_connection *ic, struct xt_node *node, struct xt_node *orig ) |
---|
| 828 | { |
---|
| 829 | char *sid; |
---|
| 830 | GSList *tflist; |
---|
| 831 | struct jabber_transfer *tf; |
---|
| 832 | struct xt_node *query; |
---|
| 833 | struct jabber_data *jd = ic->proto_data; |
---|
| 834 | |
---|
| 835 | query = xt_find_node( orig->children, "query" ); |
---|
| 836 | sid = xt_find_attr( query, "sid" ); |
---|
| 837 | |
---|
| 838 | for( tflist = jd->filetransfers ; tflist; tflist = g_slist_next(tflist) ) |
---|
| 839 | { |
---|
| 840 | struct jabber_transfer *tft = tflist->data; |
---|
| 841 | if( ( strcmp( tft->sid, sid ) == 0 ) ) |
---|
| 842 | { |
---|
| 843 | tf = tft; |
---|
| 844 | break; |
---|
| 845 | } |
---|
| 846 | } |
---|
| 847 | |
---|
| 848 | if( !tf ) |
---|
| 849 | { |
---|
| 850 | imcb_log( ic, "WARNING: Received SOCKS5 bytestream activation for unknown stream" ); |
---|
| 851 | return XT_HANDLED; |
---|
| 852 | } |
---|
| 853 | |
---|
[29c1456] | 854 | imcb_log( tf->ic, "File %s: SOCKS5 handshake and activation successful! Transfer about to start...", tf->ft->file_name ); |
---|
| 855 | |
---|
[dc0ba9c] | 856 | /* handshake went through, let's start transferring */ |
---|
| 857 | tf->ft->write_request( tf->ft ); |
---|
| 858 | |
---|
| 859 | return XT_HANDLED; |
---|
| 860 | } |
---|
| 861 | |
---|
[8a90001] | 862 | jabber_streamhost_t *jabber_si_parse_proxy( struct im_connection *ic, char *proxy ) |
---|
| 863 | { |
---|
| 864 | char *host, *port, *jid; |
---|
| 865 | jabber_streamhost_t *sh; |
---|
| 866 | |
---|
| 867 | if( ( ( host = strchr( proxy, ',' ) ) == 0 ) || |
---|
| 868 | ( ( port = strchr( host+1, ',' ) ) == 0 ) ) { |
---|
| 869 | imcb_log( ic, "Error parsing proxy setting: \"%s\" (ignored)", proxy ); |
---|
| 870 | return NULL; |
---|
| 871 | } |
---|
| 872 | |
---|
| 873 | jid = proxy; |
---|
| 874 | *host++ = '\0'; |
---|
| 875 | *port++ = '\0'; |
---|
| 876 | |
---|
| 877 | sh = g_new0( jabber_streamhost_t, 1 ); |
---|
| 878 | sh->jid = g_strdup( jid ); |
---|
| 879 | sh->host = g_strdup( host ); |
---|
| 880 | strcpy( sh->port, port ); |
---|
| 881 | |
---|
| 882 | return sh; |
---|
| 883 | } |
---|
| 884 | |
---|
| 885 | void jabber_si_set_proxies( struct bs_transfer *bt ) |
---|
| 886 | { |
---|
| 887 | struct jabber_transfer *tf = bt->tf; |
---|
| 888 | struct jabber_data *jd = tf->ic->proto_data; |
---|
| 889 | char *proxysetting = g_strdup ( set_getstr( &tf->ic->acc->set, "proxy" ) ); |
---|
[a02f34f] | 890 | char *proxy, *next, *errmsg = NULL; |
---|
[8a90001] | 891 | char port[6]; |
---|
| 892 | char host[INET6_ADDRSTRLEN]; |
---|
| 893 | jabber_streamhost_t *sh, *sh2; |
---|
| 894 | GSList *streamhosts = jd->streamhosts; |
---|
| 895 | |
---|
| 896 | proxy = proxysetting; |
---|
| 897 | while ( proxy && ( *proxy!='\0' ) ) { |
---|
| 898 | if( ( next = strchr( proxy, ';' ) ) ) |
---|
| 899 | *next++ = '\0'; |
---|
| 900 | |
---|
[a02f34f] | 901 | if( strcmp( proxy, "<local>" ) == 0 ) { |
---|
| 902 | if( ( tf->fd = ft_listen( &tf->saddr, host, port, FALSE, &errmsg ) ) != -1 ) { |
---|
| 903 | sh = g_new0( jabber_streamhost_t, 1 ); |
---|
| 904 | sh->jid = g_strdup( tf->ini_jid ); |
---|
| 905 | sh->host = g_strdup( host ); |
---|
| 906 | strcpy( sh->port, port ); |
---|
| 907 | bt->streamhosts = g_slist_append( bt->streamhosts, sh ); |
---|
[8a90001] | 908 | |
---|
[a02f34f] | 909 | bt->tf->watch_in = b_input_add( tf->fd, GAIM_INPUT_READ, jabber_bs_send_handshake, bt ); |
---|
| 910 | bt->connect_timeout = b_timeout_add( JABBER_BS_LISTEN_TIMEOUT * 1000, jabber_bs_connect_timeout, bt ); |
---|
| 911 | } else { |
---|
| 912 | imcb_log( tf->ic, "Transferring file %s: couldn't listen locally(non fatal, check your ft_listen setting in bitlbee.conf): %s", |
---|
| 913 | tf->ft->file_name, |
---|
| 914 | errmsg ); |
---|
| 915 | } |
---|
[8a90001] | 916 | } else if( strcmp( proxy, "<auto>" ) == 0 ) { |
---|
| 917 | while ( streamhosts ) { |
---|
| 918 | sh = g_new0( jabber_streamhost_t, 1 ); |
---|
| 919 | sh2 = streamhosts->data; |
---|
| 920 | sh->jid = g_strdup( sh2->jid ); |
---|
| 921 | sh->host = g_strdup( sh2->host ); |
---|
| 922 | strcpy( sh->port, sh2->port ); |
---|
| 923 | bt->streamhosts = g_slist_append( bt->streamhosts, sh ); |
---|
| 924 | streamhosts = g_slist_next( streamhosts ); |
---|
| 925 | } |
---|
| 926 | } else if( ( sh = jabber_si_parse_proxy( tf->ic, proxy ) ) ) |
---|
| 927 | bt->streamhosts = g_slist_append( bt->streamhosts, sh ); |
---|
| 928 | proxy = next; |
---|
| 929 | } |
---|
| 930 | } |
---|
| 931 | |
---|
[dc0ba9c] | 932 | /* |
---|
| 933 | * Starts a bytestream. |
---|
| 934 | */ |
---|
[2ff2076] | 935 | gboolean jabber_bs_send_start( struct jabber_transfer *tf ) |
---|
| 936 | { |
---|
| 937 | struct bs_transfer *bt; |
---|
| 938 | sha1_state_t sha; |
---|
| 939 | char hash_hex[41]; |
---|
| 940 | unsigned char hash[20]; |
---|
[dc0ba9c] | 941 | int i,ret; |
---|
[2ff2076] | 942 | |
---|
| 943 | /* SHA1( SID + Initiator JID + Target JID ) is given to the streamhost which it will match against the initiator's value */ |
---|
| 944 | sha1_init( &sha ); |
---|
| 945 | sha1_append( &sha, (unsigned char*) tf->sid, strlen( tf->sid ) ); |
---|
| 946 | sha1_append( &sha, (unsigned char*) tf->ini_jid, strlen( tf->ini_jid ) ); |
---|
| 947 | sha1_append( &sha, (unsigned char*) tf->tgt_jid, strlen( tf->tgt_jid ) ); |
---|
| 948 | sha1_finish( &sha, hash ); |
---|
| 949 | |
---|
| 950 | for( i = 0; i < 20; i ++ ) |
---|
| 951 | sprintf( hash_hex + i * 2, "%02x", hash[i] ); |
---|
| 952 | |
---|
| 953 | bt = g_new0( struct bs_transfer, 1 ); |
---|
| 954 | bt->tf = tf; |
---|
| 955 | bt->phase = BS_PHASE_CONNECT; |
---|
| 956 | bt->pseudoadr = g_strdup( hash_hex ); |
---|
| 957 | tf->streamhandle = bt; |
---|
| 958 | tf->ft->free = jabber_bs_free_transfer; |
---|
| 959 | tf->ft->canceled = jabber_bs_canceled; |
---|
| 960 | |
---|
[8a90001] | 961 | jabber_si_set_proxies( bt ); |
---|
[dc0ba9c] | 962 | |
---|
[8a90001] | 963 | ret = jabber_bs_send_request( tf, bt->streamhosts); |
---|
[dc0ba9c] | 964 | |
---|
| 965 | return ret; |
---|
[2ff2076] | 966 | } |
---|
| 967 | |
---|
[dc0ba9c] | 968 | gboolean jabber_bs_send_request( struct jabber_transfer *tf, GSList *streamhosts ) |
---|
[2ff2076] | 969 | { |
---|
[dc0ba9c] | 970 | struct xt_node *shnode, *query, *iq; |
---|
[2ff2076] | 971 | |
---|
| 972 | query = xt_new_node( "query", NULL, NULL ); |
---|
| 973 | xt_add_attr( query, "xmlns", XMLNS_BYTESTREAMS ); |
---|
| 974 | xt_add_attr( query, "sid", tf->sid ); |
---|
| 975 | xt_add_attr( query, "mode", "tcp" ); |
---|
[dc0ba9c] | 976 | |
---|
| 977 | while( streamhosts ) { |
---|
| 978 | jabber_streamhost_t *sh = streamhosts->data; |
---|
| 979 | shnode = xt_new_node( "streamhost", NULL, NULL ); |
---|
| 980 | xt_add_attr( shnode, "jid", sh->jid ); |
---|
| 981 | xt_add_attr( shnode, "host", sh->host ); |
---|
| 982 | xt_add_attr( shnode, "port", sh->port ); |
---|
| 983 | |
---|
| 984 | xt_add_child( query, shnode ); |
---|
| 985 | |
---|
| 986 | streamhosts = g_slist_next( streamhosts ); |
---|
| 987 | } |
---|
| 988 | |
---|
[2ff2076] | 989 | |
---|
| 990 | iq = jabber_make_packet( "iq", "set", tf->tgt_jid, query ); |
---|
| 991 | xt_add_attr( iq, "from", tf->ini_jid ); |
---|
| 992 | |
---|
| 993 | jabber_cache_add( tf->ic, iq, jabber_bs_send_handle_reply ); |
---|
| 994 | |
---|
| 995 | if( !jabber_write_packet( tf->ic, iq ) ) |
---|
| 996 | imcb_file_canceled( tf->ft, "Error transmitting bytestream request" ); |
---|
| 997 | return TRUE; |
---|
| 998 | } |
---|
| 999 | |
---|
| 1000 | gboolean jabber_bs_send_handshake_abort(struct bs_transfer *bt, char *error ) |
---|
| 1001 | { |
---|
| 1002 | struct jabber_transfer *tf = bt->tf; |
---|
[2625d6d] | 1003 | struct jabber_data *jd = tf->ic->proto_data; |
---|
[2ff2076] | 1004 | |
---|
[dc0ba9c] | 1005 | /* TODO: did the receiver get here somehow??? */ |
---|
[2ff2076] | 1006 | imcb_log( tf->ic, "Transferring file %s: SOCKS5 handshake failed: %s", |
---|
| 1007 | tf->ft->file_name, |
---|
| 1008 | error ); |
---|
| 1009 | |
---|
[2625d6d] | 1010 | if( jd->streamhosts==NULL ) /* we're done here unless we have a proxy to try */ |
---|
| 1011 | imcb_file_canceled( tf->ft, error ); |
---|
[2ff2076] | 1012 | |
---|
| 1013 | return FALSE; |
---|
| 1014 | } |
---|
| 1015 | |
---|
| 1016 | /* |
---|
| 1017 | * SOCKS5BYTESTREAM protocol for the sender |
---|
| 1018 | */ |
---|
| 1019 | gboolean jabber_bs_send_handshake( gpointer data, gint fd, b_input_condition cond ) |
---|
| 1020 | { |
---|
| 1021 | struct bs_transfer *bt = data; |
---|
| 1022 | struct jabber_transfer *tf = bt->tf; |
---|
| 1023 | short revents; |
---|
| 1024 | |
---|
| 1025 | if ( !jabber_bs_poll( bt, fd, &revents ) ) |
---|
| 1026 | return FALSE; |
---|
| 1027 | |
---|
| 1028 | switch( bt->phase ) |
---|
| 1029 | { |
---|
| 1030 | case BS_PHASE_CONNECT: |
---|
| 1031 | { |
---|
| 1032 | struct sockaddr_storage clt_addr; |
---|
| 1033 | socklen_t ssize = sizeof( clt_addr ); |
---|
| 1034 | |
---|
| 1035 | /* Connect */ |
---|
| 1036 | |
---|
| 1037 | ASSERTSOCKOP( tf->fd = accept( fd, (struct sockaddr *) &clt_addr, &ssize ), "Accepting connection" ); |
---|
| 1038 | |
---|
| 1039 | closesocket( fd ); |
---|
| 1040 | fd = tf->fd; |
---|
| 1041 | sock_make_nonblocking( fd ); |
---|
| 1042 | |
---|
| 1043 | bt->phase = BS_PHASE_CONNECTED; |
---|
| 1044 | |
---|
| 1045 | bt->tf->watch_in = b_input_add( fd, GAIM_INPUT_READ, jabber_bs_send_handshake, bt ); |
---|
| 1046 | return FALSE; |
---|
| 1047 | } |
---|
| 1048 | case BS_PHASE_CONNECTED: |
---|
| 1049 | { |
---|
| 1050 | int ret, have_noauth=FALSE; |
---|
| 1051 | struct { |
---|
| 1052 | unsigned char ver; |
---|
| 1053 | unsigned char method; |
---|
| 1054 | } socks5_auth_reply = { .ver = 5, .method = 0 }; |
---|
| 1055 | struct { |
---|
| 1056 | unsigned char ver; |
---|
| 1057 | unsigned char nmethods; |
---|
| 1058 | unsigned char method; |
---|
| 1059 | } socks5_hello; |
---|
| 1060 | |
---|
| 1061 | if( !( ret = jabber_bs_peek( bt, &socks5_hello, sizeof( socks5_hello ) ) ) ) |
---|
| 1062 | return FALSE; |
---|
| 1063 | |
---|
| 1064 | if( ret < sizeof( socks5_hello ) ) |
---|
| 1065 | return TRUE; |
---|
| 1066 | |
---|
| 1067 | if( !( socks5_hello.ver == 5 ) || |
---|
| 1068 | !( socks5_hello.nmethods >= 1 ) || |
---|
| 1069 | !( socks5_hello.nmethods < 32 ) ) |
---|
| 1070 | return jabber_bs_abort( bt, "Invalid auth request ver=%d nmethods=%d method=%d", socks5_hello.ver, socks5_hello.nmethods, socks5_hello.method ); |
---|
| 1071 | |
---|
| 1072 | have_noauth = socks5_hello.method == 0; |
---|
| 1073 | |
---|
| 1074 | if( socks5_hello.nmethods > 1 ) |
---|
| 1075 | { |
---|
| 1076 | char mbuf[32]; |
---|
| 1077 | int i; |
---|
| 1078 | ASSERTSOCKOP( ret = recv( fd, mbuf, socks5_hello.nmethods - 1, 0 ) , "Receiving auth methods" ); |
---|
| 1079 | if( ret < ( socks5_hello.nmethods - 1 ) ) |
---|
| 1080 | return jabber_bs_abort( bt, "Partial auth request"); |
---|
| 1081 | for( i = 0 ; !have_noauth && ( i < socks5_hello.nmethods - 1 ) ; i ++ ) |
---|
| 1082 | if( mbuf[i] == 0 ) |
---|
| 1083 | have_noauth = TRUE; |
---|
| 1084 | } |
---|
| 1085 | |
---|
| 1086 | if( !have_noauth ) |
---|
| 1087 | return jabber_bs_abort( bt, "Auth request didn't include no authentication" ); |
---|
| 1088 | |
---|
| 1089 | ASSERTSOCKOP( send( fd, &socks5_auth_reply, sizeof( socks5_auth_reply ) , 0 ), "Sending auth reply" ); |
---|
| 1090 | |
---|
| 1091 | bt->phase = BS_PHASE_REQUEST; |
---|
| 1092 | |
---|
| 1093 | return TRUE; |
---|
| 1094 | } |
---|
| 1095 | case BS_PHASE_REQUEST: |
---|
| 1096 | { |
---|
| 1097 | struct socks5_message socks5_connect; |
---|
| 1098 | int msgsize = sizeof( struct socks5_message ); |
---|
[4358b10] | 1099 | int ret; |
---|
[2ff2076] | 1100 | |
---|
[4358b10] | 1101 | if( !( ret = jabber_bs_peek( bt, &socks5_connect, msgsize ) ) ) |
---|
[2ff2076] | 1102 | return FALSE; |
---|
| 1103 | |
---|
[4358b10] | 1104 | if( ret < msgsize ) |
---|
| 1105 | return TRUE; |
---|
| 1106 | |
---|
[2ff2076] | 1107 | if( !( socks5_connect.ver == 5) || |
---|
| 1108 | !( socks5_connect.cmdrep.cmd == 1 ) || |
---|
| 1109 | !( socks5_connect.atyp == 3 ) || |
---|
| 1110 | !(socks5_connect.addrlen == 40 ) ) |
---|
| 1111 | return jabber_bs_abort( bt, "Invalid SOCKS5 Connect message (addrlen=%d, ver=%d, cmd=%d, atyp=%d)", socks5_connect.addrlen, socks5_connect.ver, socks5_connect.cmdrep.cmd, socks5_connect.atyp ); |
---|
| 1112 | if( !( memcmp( socks5_connect.address, bt->pseudoadr, 40 ) == 0 ) ) |
---|
| 1113 | return jabber_bs_abort( bt, "SOCKS5 Connect message contained wrong digest"); |
---|
| 1114 | |
---|
| 1115 | socks5_connect.cmdrep.rep = 0; |
---|
| 1116 | |
---|
| 1117 | ASSERTSOCKOP( send( fd, &socks5_connect, msgsize, 0 ), "Sending connect reply" ); |
---|
| 1118 | |
---|
| 1119 | bt->phase = BS_PHASE_REPLY; |
---|
| 1120 | |
---|
[dce3903] | 1121 | imcb_log( tf->ic, "File %s: SOCKS5 handshake successful! Transfer about to start...", tf->ft->file_name ); |
---|
| 1122 | |
---|
[2ff2076] | 1123 | if( tf->accepted ) |
---|
| 1124 | { |
---|
[dce3903] | 1125 | /* streamhost-used message came already in(possible?), let's start sending */ |
---|
| 1126 | tf->ft->write_request( tf->ft ); |
---|
[2ff2076] | 1127 | } |
---|
| 1128 | |
---|
| 1129 | tf->watch_in = 0; |
---|
| 1130 | return FALSE; |
---|
| 1131 | |
---|
| 1132 | } |
---|
| 1133 | default: |
---|
| 1134 | /* BUG */ |
---|
| 1135 | imcb_log( bt->tf->ic, "BUG in file transfer code: undefined handshake phase" ); |
---|
| 1136 | |
---|
| 1137 | bt->tf->watch_in = 0; |
---|
| 1138 | return FALSE; |
---|
| 1139 | } |
---|
| 1140 | } |
---|
| 1141 | #undef ASSERTSOCKOP |
---|