Mercurial > dropbear
annotate common-session.c @ 1622:e11ed628708b
- Add adaptive authentication failure delay
- Rework monotonic_now/gettime_wrapper and use clock_gettime on more platforms
| author | Matt Johnston <matt@ucc.asn.au> |
|---|---|
| date | Mon, 05 Nov 2018 23:36:34 +0800 |
| parents | 60fceff95858 |
| children | aabde6f57fce |
| rev | line source |
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1 /* |
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2 * Dropbear - a SSH2 server |
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3 * |
| 1079 | 4 * Copyright (c) Matt Johnston |
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5 * All rights reserved. |
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6 * |
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7 * Permission is hereby granted, free of charge, to any person obtaining a copy |
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8 * of this software and associated documentation files (the "Software"), to deal |
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9 * in the Software without restriction, including without limitation the rights |
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10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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11 * copies of the Software, and to permit persons to whom the Software is |
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12 * furnished to do so, subject to the following conditions: |
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13 * |
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14 * The above copyright notice and this permission notice shall be included in |
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15 * all copies or substantial portions of the Software. |
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16 * |
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17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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20 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
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23 * SOFTWARE. */ |
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24 |
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25 #include "includes.h" |
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26 #include "session.h" |
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27 #include "dbutil.h" |
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28 #include "packet.h" |
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29 #include "algo.h" |
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30 #include "buffer.h" |
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31 #include "dss.h" |
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32 #include "ssh.h" |
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33 #include "dbrandom.h" |
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34 #include "kex.h" |
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35 #include "channel.h" |
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36 #include "runopts.h" |
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37 #include "netio.h" |
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38 |
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39 static void checktimeouts(void); |
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40 static long select_timeout(void); |
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41 static int ident_readln(int fd, char* buf, int count); |
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42 static void read_session_identification(void); |
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| 24 | 44 struct sshsession ses; /* GLOBAL */ |
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45 |
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46 /* called only at the start of a session, set up initial state */ |
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47 void common_session_init(int sock_in, int sock_out) { |
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48 time_t now; |
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49 |
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50 #if DEBUG_TRACE |
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51 debug_start_net(); |
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52 #endif |
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53 |
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54 TRACE(("enter session_init")) |
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55 |
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56 ses.sock_in = sock_in; |
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57 ses.sock_out = sock_out; |
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58 ses.maxfd = MAX(sock_in, sock_out); |
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59 |
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60 if (sock_in >= 0) { |
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61 setnonblocking(sock_in); |
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62 } |
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63 if (sock_out >= 0) { |
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64 setnonblocking(sock_out); |
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65 } |
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66 |
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67 ses.socket_prio = DROPBEAR_PRIO_DEFAULT; |
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68 /* Sets it to lowdelay */ |
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69 update_channel_prio(); |
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70 |
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71 now = monotonic_now(); |
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72 ses.connect_time = now; |
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73 ses.last_packet_time_keepalive_recv = now; |
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74 ses.last_packet_time_idle = now; |
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75 ses.last_packet_time_any_sent = 0; |
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76 ses.last_packet_time_keepalive_sent = 0; |
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77 |
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78 #if DROPBEAR_FUZZ |
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79 if (!fuzz.fuzzing) |
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80 #endif |
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81 { |
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82 if (pipe(ses.signal_pipe) < 0) { |
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83 dropbear_exit("Signal pipe failed"); |
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84 } |
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85 setnonblocking(ses.signal_pipe[0]); |
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86 setnonblocking(ses.signal_pipe[1]); |
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87 ses.maxfd = MAX(ses.maxfd, ses.signal_pipe[0]); |
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88 ses.maxfd = MAX(ses.maxfd, ses.signal_pipe[1]); |
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89 } |
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90 |
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91 ses.writepayload = buf_new(TRANS_MAX_PAYLOAD_LEN); |
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92 ses.transseq = 0; |
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93 |
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94 ses.readbuf = NULL; |
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95 ses.payload = NULL; |
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96 ses.recvseq = 0; |
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97 |
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98 initqueue(&ses.writequeue); |
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99 |
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100 ses.requirenext = SSH_MSG_KEXINIT; |
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101 ses.dataallowed = 1; /* we can send data until we actually |
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102 send the SSH_MSG_KEXINIT */ |
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103 ses.ignorenext = 0; |
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104 ses.lastpacket = 0; |
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105 ses.reply_queue_head = NULL; |
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106 ses.reply_queue_tail = NULL; |
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107 |
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108 /* set all the algos to none */ |
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109 ses.keys = (struct key_context*)m_malloc(sizeof(struct key_context)); |
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110 ses.newkeys = NULL; |
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111 ses.keys->recv.algo_crypt = &dropbear_nocipher; |
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112 ses.keys->trans.algo_crypt = &dropbear_nocipher; |
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113 ses.keys->recv.crypt_mode = &dropbear_mode_none; |
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114 ses.keys->trans.crypt_mode = &dropbear_mode_none; |
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115 |
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116 ses.keys->recv.algo_mac = &dropbear_nohash; |
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117 ses.keys->trans.algo_mac = &dropbear_nohash; |
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118 |
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119 ses.keys->algo_kex = NULL; |
|
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120 ses.keys->algo_hostkey = -1; |
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121 ses.keys->recv.algo_comp = DROPBEAR_COMP_NONE; |
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122 ses.keys->trans.algo_comp = DROPBEAR_COMP_NONE; |
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123 |
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124 #ifndef DISABLE_ZLIB |
|
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125 ses.keys->recv.zstream = NULL; |
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126 ses.keys->trans.zstream = NULL; |
|
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127 #endif |
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128 |
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129 /* key exchange buffers */ |
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130 ses.session_id = NULL; |
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131 ses.kexhashbuf = NULL; |
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132 ses.transkexinit = NULL; |
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133 ses.dh_K = NULL; |
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134 ses.remoteident = NULL; |
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135 |
|
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136 ses.chantypes = NULL; |
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137 |
|
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138 ses.allowprivport = 0; |
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139 |
|
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140 TRACE(("leave session_init")) |
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141 } |
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142 |
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143 void session_loop(void(*loophandler)(void)) { |
| 26 | 144 |
| 145 fd_set readfd, writefd; | |
| 146 struct timeval timeout; | |
| 147 int val; | |
| 148 | |
| 149 /* main loop, select()s for all sockets in use */ | |
| 150 for(;;) { | |
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151 const int writequeue_has_space = (ses.writequeue_len <= 2*TRANS_MAX_PAYLOAD_LEN); |
| 26 | 152 |
|
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153 timeout.tv_sec = select_timeout(); |
| 26 | 154 timeout.tv_usec = 0; |
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155 DROPBEAR_FD_ZERO(&writefd); |
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156 DROPBEAR_FD_ZERO(&readfd); |
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157 |
|
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158 dropbear_assert(ses.payload == NULL); |
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159 |
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160 /* We get woken up when signal handlers write to this pipe. |
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161 SIGCHLD in svr-chansession is the only one currently. */ |
|
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162 #if DROPBEAR_FUZZ |
| 1357 | 163 if (!fuzz.fuzzing) |
| 164 #endif | |
| 165 { | |
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166 FD_SET(ses.signal_pipe[0], &readfd); |
| 1357 | 167 } |
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168 |
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169 /* set up for channels which can be read/written */ |
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170 setchannelfds(&readfd, &writefd, writequeue_has_space); |
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171 |
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172 /* Pending connections to test */ |
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173 set_connect_fds(&writefd); |
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174 |
|
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175 /* We delay reading from the input socket during initial setup until |
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176 after we have written out our initial KEXINIT packet (empty writequeue). |
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177 This means our initial packet can be in-flight while we're doing a blocking |
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178 read for the remote ident. |
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179 We also avoid reading from the socket if the writequeue is full, that avoids |
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180 replies backing up */ |
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181 if (ses.sock_in != -1 |
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182 && (ses.remoteident || isempty(&ses.writequeue)) |
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183 && writequeue_has_space) { |
|
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184 FD_SET(ses.sock_in, &readfd); |
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185 } |
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186 |
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187 /* Ordering is important, this test must occur after any other function |
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188 might have queued packets (such as connection handlers) */ |
|
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189 if (ses.sock_out != -1 && !isempty(&ses.writequeue)) { |
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190 FD_SET(ses.sock_out, &writefd); |
| 26 | 191 } |
| 1025 | 192 |
| 26 | 193 val = select(ses.maxfd+1, &readfd, &writefd, NULL, &timeout); |
| 194 | |
|
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195 if (ses.exitflag) { |
| 26 | 196 dropbear_exit("Terminated by signal"); |
| 197 } | |
| 198 | |
|
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199 if (val < 0 && errno != EINTR) { |
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200 dropbear_exit("Error in select"); |
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201 } |
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202 |
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203 if (val <= 0) { |
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204 /* If we were interrupted or the select timed out, we still |
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205 * want to iterate over channels etc for reading, to handle |
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206 * server processes exiting etc. |
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207 * We don't want to read/write FDs. */ |
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208 DROPBEAR_FD_ZERO(&writefd); |
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209 DROPBEAR_FD_ZERO(&readfd); |
| 26 | 210 } |
|
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211 |
|
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212 /* We'll just empty out the pipe if required. We don't do |
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213 any thing with the data, since the pipe's purpose is purely to |
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214 wake up the select() above. */ |
|
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215 ses.channel_signal_pending = 0; |
|
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216 if (FD_ISSET(ses.signal_pipe[0], &readfd)) { |
|
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217 char x; |
|
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218 TRACE(("signal pipe set")) |
|
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|
219 while (read(ses.signal_pipe[0], &x, 1) > 0) {} |
|
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220 ses.channel_signal_pending = 1; |
|
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221 } |
| 26 | 222 |
| 223 /* check for auth timeout, rekeying required etc */ | |
| 224 checktimeouts(); | |
| 225 | |
|
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226 /* process session socket's incoming data */ |
|
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227 if (ses.sock_in != -1) { |
|
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228 if (FD_ISSET(ses.sock_in, &readfd)) { |
|
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229 if (!ses.remoteident) { |
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230 /* blocking read of the version string */ |
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231 read_session_identification(); |
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232 } else { |
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233 read_packet(); |
|
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234 } |
| 26 | 235 } |
| 236 | |
| 237 /* Process the decrypted packet. After this, the read buffer | |
| 238 * will be ready for a new packet */ | |
| 239 if (ses.payload != NULL) { | |
| 240 process_packet(); | |
| 241 } | |
| 242 } | |
| 1025 | 243 |
|
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|
244 /* if required, flush out any queued reply packets that |
|
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245 were being held up during a KEX */ |
|
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|
246 maybe_flush_reply_queue(); |
| 26 | 247 |
| 1025 | 248 handle_connect_fds(&writefd); |
| 249 | |
|
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250 /* loop handler prior to channelio, in case the server loophandler closes |
|
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251 channels on process exit */ |
|
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|
252 loophandler(); |
|
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253 |
| 26 | 254 /* process pipes etc for the channels, ses.dataallowed == 0 |
| 255 * during rekeying ) */ | |
|
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Read (and enqueue) packets from interactive input even when
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256 channelio(&readfd, &writefd); |
| 26 | 257 |
|
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258 /* process session socket's outgoing data */ |
|
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259 if (ses.sock_out != -1) { |
|
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260 if (!isempty(&ses.writequeue)) { |
|
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261 write_packet(); |
|
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262 } |
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263 } |
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|
264 |
| 26 | 265 } /* for(;;) */ |
| 266 | |
| 267 /* Not reached */ | |
| 268 } | |
| 269 | |
|
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|
270 static void cleanup_buf(buffer **buf) { |
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|
271 if (!*buf) { |
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|
272 return; |
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|
273 } |
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|
274 buf_burn(*buf); |
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275 buf_free(*buf); |
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|
276 *buf = NULL; |
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277 } |
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278 |
|
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279 /* clean up a session on exit */ |
|
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|
280 void session_cleanup() { |
|
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281 |
|
165
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|
282 TRACE(("enter session_cleanup")) |
|
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283 |
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|
284 /* we can't cleanup if we don't know the session state */ |
|
1495
0c16b4ccbd54
make signal flags volatile, simplify handling
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|
285 if (!ses.init_done) { |
|
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286 TRACE(("leave session_cleanup: !ses.init_done")) |
|
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287 return; |
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|
288 } |
|
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289 |
| 1079 | 290 /* BEWARE of changing order of functions here. */ |
|
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291 |
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292 /* Must be before extra_session_cleanup() */ |
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|
293 chancleanup(); |
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294 |
|
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|
295 if (ses.extra_session_cleanup) { |
|
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|
296 ses.extra_session_cleanup(); |
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|
297 } |
|
891
e78f5ce6e7bb
cleanup before clearing keys
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886
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changeset
|
298 |
| 1079 | 299 /* After these are freed most functions will fail */ |
|
1295
750ec4ec4cbe
Convert #ifdef to #if, other build changes
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1292
diff
changeset
|
300 #if DROPBEAR_CLEANUP |
|
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301 /* listeners call cleanup functions, this should occur before |
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302 other session state is freed. */ |
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|
303 remove_all_listeners(); |
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304 |
| 1050 | 305 remove_connect_pending(); |
| 306 | |
|
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|
307 while (!isempty(&ses.writequeue)) { |
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|
308 buf_free(dequeue(&ses.writequeue)); |
|
761
ac2158e3e403
ecc kind of works, needs fixing/testing
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|
309 } |
|
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|
310 |
|
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|
311 m_free(ses.newkeys); |
|
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glaring wrapfd problems fixed
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|
312 #ifndef DISABLE_ZLIB |
|
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|
313 if (ses.keys->recv.zstream != NULL) { |
|
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|
314 if (inflateEnd(ses.keys->recv.zstream) == Z_STREAM_ERROR) { |
|
6b89eb92f872
glaring wrapfd problems fixed
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|
315 dropbear_exit("Crypto error"); |
|
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glaring wrapfd problems fixed
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|
316 } |
|
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glaring wrapfd problems fixed
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|
317 m_free(ses.keys->recv.zstream); |
|
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glaring wrapfd problems fixed
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|
318 } |
|
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|
319 #endif |
|
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|
320 |
|
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|
321 m_free(ses.remoteident); |
|
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|
322 m_free(ses.authstate.pw_dir); |
|
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Free memory before exiting. Based on patch from Thorsten Horstmann.
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|
323 m_free(ses.authstate.pw_name); |
|
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Free memory before exiting. Based on patch from Thorsten Horstmann.
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changeset
|
324 m_free(ses.authstate.pw_shell); |
|
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Free memory before exiting. Based on patch from Thorsten Horstmann.
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diff
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|
325 m_free(ses.authstate.pw_passwd); |
|
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Free memory before exiting. Based on patch from Thorsten Horstmann.
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changeset
|
326 m_free(ses.authstate.username); |
|
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Free memory before exiting. Based on patch from Thorsten Horstmann.
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|
327 #endif |
|
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|
328 |
|
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Free memory before exiting. Based on patch from Thorsten Horstmann.
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diff
changeset
|
329 cleanup_buf(&ses.session_id); |
|
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Free memory before exiting. Based on patch from Thorsten Horstmann.
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diff
changeset
|
330 cleanup_buf(&ses.hash); |
|
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Free memory before exiting. Based on patch from Thorsten Horstmann.
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diff
changeset
|
331 cleanup_buf(&ses.payload); |
|
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diff
changeset
|
332 cleanup_buf(&ses.readbuf); |
|
2b4fd440399d
Free memory before exiting. Based on patch from Thorsten Horstmann.
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diff
changeset
|
333 cleanup_buf(&ses.writepayload); |
|
1041
3fb883a6aa81
Some additional cleanup functions
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diff
changeset
|
334 cleanup_buf(&ses.kexhashbuf); |
|
3fb883a6aa81
Some additional cleanup functions
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diff
changeset
|
335 cleanup_buf(&ses.transkexinit); |
|
3fb883a6aa81
Some additional cleanup functions
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1040
diff
changeset
|
336 if (ses.dh_K) { |
|
3fb883a6aa81
Some additional cleanup functions
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1040
diff
changeset
|
337 mp_clear(ses.dh_K); |
|
3fb883a6aa81
Some additional cleanup functions
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diff
changeset
|
338 } |
|
3fb883a6aa81
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diff
changeset
|
339 m_free(ses.dh_K); |
|
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diff
changeset
|
340 |
|
4
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Makefile.in contains updated files required
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diff
changeset
|
341 m_burn(ses.keys, sizeof(struct key_context)); |
|
fe6bca95afa7
Makefile.in contains updated files required
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parents:
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changeset
|
342 m_free(ses.keys); |
|
fe6bca95afa7
Makefile.in contains updated files required
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parents:
diff
changeset
|
343 |
|
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents:
135
diff
changeset
|
344 TRACE(("leave session_cleanup")) |
|
4
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Makefile.in contains updated files required
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diff
changeset
|
345 } |
|
fe6bca95afa7
Makefile.in contains updated files required
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diff
changeset
|
346 |
|
726
78eda530c000
send out our kexinit packet before blocking to read the SSH version string
Matt Johnston <matt@ucc.asn.au>
parents:
705
diff
changeset
|
347 void send_session_identification() { |
|
751
685d05f1cc5c
Just put the version string on the queue, don't use atomicio
Matt Johnston <matt@ucc.asn.au>
parents:
733
diff
changeset
|
348 buffer *writebuf = buf_new(strlen(LOCAL_IDENT "\r\n") + 1); |
|
1094
c45d65392c1a
Fix pointer differ in signess warnings [-Werror=pointer-sign]
Gaël PORTAY <gael.portay@gmail.com>
parents:
1079
diff
changeset
|
349 buf_putbytes(writebuf, (const unsigned char *) LOCAL_IDENT "\r\n", strlen(LOCAL_IDENT "\r\n")); |
|
1577
399d8eb961b5
get rid of unused packet_type in encrypted write queue
Matt Johnston <matt@ucc.asn.au>
parents:
1558
diff
changeset
|
350 writebuf_enqueue(writebuf); |
|
726
78eda530c000
send out our kexinit packet before blocking to read the SSH version string
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parents:
705
diff
changeset
|
351 } |
|
4
fe6bca95afa7
Makefile.in contains updated files required
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parents:
diff
changeset
|
352 |
|
726
78eda530c000
send out our kexinit packet before blocking to read the SSH version string
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parents:
705
diff
changeset
|
353 static void read_session_identification() { |
|
4
fe6bca95afa7
Makefile.in contains updated files required
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parents:
diff
changeset
|
354 /* max length of 255 chars */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
355 char linebuf[256]; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
356 int len = 0; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
357 char done = 0; |
|
103
8aeac62a968f
Allow leading lines before the ident banner when connecting
Matt Johnston <matt@ucc.asn.au>
parents:
41
diff
changeset
|
358 int i; |
|
513
a3748e54273c
Idle timeout patch from Farrell Aultman. Needs testing, unsure if server
Matt Johnston <matt@ucc.asn.au>
parents:
502
diff
changeset
|
359 /* If they send more than 50 lines, something is wrong */ |
|
275
7f9adaf85fca
Exit with a message if the ssh protocol version is incompatible
Matt Johnston <matt@ucc.asn.au>
parents:
242
diff
changeset
|
360 for (i = 0; i < 50; i++) { |
|
479
e3db1f7a2e43
- Split main socket var into ses.sock_in/ses.sock_out in preparation
Matt Johnston <matt@ucc.asn.au>
parents:
454
diff
changeset
|
361 len = ident_readln(ses.sock_in, linebuf, sizeof(linebuf)); |
|
103
8aeac62a968f
Allow leading lines before the ident banner when connecting
Matt Johnston <matt@ucc.asn.au>
parents:
41
diff
changeset
|
362 |
|
8aeac62a968f
Allow leading lines before the ident banner when connecting
Matt Johnston <matt@ucc.asn.au>
parents:
41
diff
changeset
|
363 if (len < 0 && errno != EINTR) { |
|
8aeac62a968f
Allow leading lines before the ident banner when connecting
Matt Johnston <matt@ucc.asn.au>
parents:
41
diff
changeset
|
364 /* It failed */ |
|
8aeac62a968f
Allow leading lines before the ident banner when connecting
Matt Johnston <matt@ucc.asn.au>
parents:
41
diff
changeset
|
365 break; |
|
8aeac62a968f
Allow leading lines before the ident banner when connecting
Matt Johnston <matt@ucc.asn.au>
parents:
41
diff
changeset
|
366 } |
|
8aeac62a968f
Allow leading lines before the ident banner when connecting
Matt Johnston <matt@ucc.asn.au>
parents:
41
diff
changeset
|
367 |
|
8aeac62a968f
Allow leading lines before the ident banner when connecting
Matt Johnston <matt@ucc.asn.au>
parents:
41
diff
changeset
|
368 if (len >= 4 && memcmp(linebuf, "SSH-", 4) == 0) { |
|
8aeac62a968f
Allow leading lines before the ident banner when connecting
Matt Johnston <matt@ucc.asn.au>
parents:
41
diff
changeset
|
369 /* start of line matches */ |
|
8aeac62a968f
Allow leading lines before the ident banner when connecting
Matt Johnston <matt@ucc.asn.au>
parents:
41
diff
changeset
|
370 done = 1; |
|
8aeac62a968f
Allow leading lines before the ident banner when connecting
Matt Johnston <matt@ucc.asn.au>
parents:
41
diff
changeset
|
371 break; |
|
8aeac62a968f
Allow leading lines before the ident banner when connecting
Matt Johnston <matt@ucc.asn.au>
parents:
41
diff
changeset
|
372 } |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
373 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
374 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
375 if (!done) { |
|
1302
6a14b1f6dc04
better TRACE of failed remote ident
Matt Johnston <matt@ucc.asn.au>
parents:
1276
diff
changeset
|
376 TRACE(("error reading remote ident: %s\n", strerror(errno))) |
|
344
bf29e6659fb9
Just use the normal "remote closed" handler when reading ident stings
Matt Johnston <matt@ucc.asn.au>
parents:
275
diff
changeset
|
377 ses.remoteclosed(); |
|
4
fe6bca95afa7
Makefile.in contains updated files required
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parents:
diff
changeset
|
378 } else { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
379 /* linebuf is already null terminated */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
380 ses.remoteident = m_malloc(len); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
381 memcpy(ses.remoteident, linebuf, len); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
382 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
383 |
|
513
a3748e54273c
Idle timeout patch from Farrell Aultman. Needs testing, unsure if server
Matt Johnston <matt@ucc.asn.au>
parents:
502
diff
changeset
|
384 /* Shall assume that 2.x will be backwards compatible. */ |
|
a3748e54273c
Idle timeout patch from Farrell Aultman. Needs testing, unsure if server
Matt Johnston <matt@ucc.asn.au>
parents:
502
diff
changeset
|
385 if (strncmp(ses.remoteident, "SSH-2.", 6) != 0 |
|
a3748e54273c
Idle timeout patch from Farrell Aultman. Needs testing, unsure if server
Matt Johnston <matt@ucc.asn.au>
parents:
502
diff
changeset
|
386 && strncmp(ses.remoteident, "SSH-1.99-", 9) != 0) { |
|
a3748e54273c
Idle timeout patch from Farrell Aultman. Needs testing, unsure if server
Matt Johnston <matt@ucc.asn.au>
parents:
502
diff
changeset
|
387 dropbear_exit("Incompatible remote version '%s'", ses.remoteident); |
|
a3748e54273c
Idle timeout patch from Farrell Aultman. Needs testing, unsure if server
Matt Johnston <matt@ucc.asn.au>
parents:
502
diff
changeset
|
388 } |
|
275
7f9adaf85fca
Exit with a message if the ssh protocol version is incompatible
Matt Johnston <matt@ucc.asn.au>
parents:
242
diff
changeset
|
389 |
|
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
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390 TRACE(("remoteident: %s", ses.remoteident)) |
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391 |
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392 } |
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393 |
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394 /* returns the length including null-terminating zero on success, |
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395 * or -1 on failure */ |
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396 static int ident_readln(int fd, char* buf, int count) { |
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397 |
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398 char in; |
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399 int pos = 0; |
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400 int num = 0; |
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401 fd_set fds; |
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402 struct timeval timeout; |
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403 |
|
165
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404 TRACE(("enter ident_readln")) |
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405 |
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406 if (count < 1) { |
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407 return -1; |
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408 } |
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409 |
|
1596
60fceff95858
workaround memory sanitizer FD_ZERO false positives
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410 DROPBEAR_FD_ZERO(&fds); |
|
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411 |
|
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412 /* select since it's a non-blocking fd */ |
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413 |
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414 /* leave space to null-terminate */ |
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415 while (pos < count-1) { |
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416 |
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417 FD_SET(fd, &fds); |
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418 |
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419 timeout.tv_sec = 1; |
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420 timeout.tv_usec = 0; |
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421 if (select(fd+1, &fds, NULL, NULL, &timeout) < 0) { |
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422 if (errno == EINTR) { |
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423 continue; |
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424 } |
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425 TRACE(("leave ident_readln: select error")) |
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426 return -1; |
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427 } |
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428 |
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429 checktimeouts(); |
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430 |
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431 /* Have to go one byte at a time, since we don't want to read past |
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432 * the end, and have to somehow shove bytes back into the normal |
|
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433 * packet reader */ |
|
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434 if (FD_ISSET(fd, &fds)) { |
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435 num = read(fd, &in, 1); |
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436 /* a "\n" is a newline, "\r" we want to read in and keep going |
|
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437 * so that it won't be read as part of the next line */ |
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438 if (num < 0) { |
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439 /* error */ |
|
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440 if (errno == EINTR) { |
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441 continue; /* not a real error */ |
|
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442 } |
|
165
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443 TRACE(("leave ident_readln: read error")) |
|
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444 return -1; |
|
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445 } |
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446 if (num == 0) { |
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447 /* EOF */ |
|
165
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448 TRACE(("leave ident_readln: EOF")) |
|
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449 return -1; |
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450 } |
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451 if (in == '\n') { |
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452 /* end of ident string */ |
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453 break; |
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454 } |
|
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455 /* we don't want to include '\r's */ |
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456 if (in != '\r') { |
|
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457 buf[pos] = in; |
|
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458 pos++; |
|
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459 } |
|
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460 } |
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461 } |
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462 |
|
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463 buf[pos] = '\0'; |
|
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464 TRACE(("leave ident_readln: return %d", pos+1)) |
|
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465 return pos+1; |
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466 } |
|
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467 |
|
970
0bb16232e7c4
Make keepalive handling more robust, this should now match what OpenSSH does
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diff
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|
468 void ignore_recv_response() { |
|
1038
d3925ed45a85
Fix for old compilers, variable declarations at beginning of functions
Thorsten Horstmann <thorsten.horstmann@web.de>
parents:
1021
diff
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|
469 /* Do nothing */ |
|
970
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Make keepalive handling more robust, this should now match what OpenSSH does
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968
diff
changeset
|
470 TRACE(("Ignored msg_request_response")) |
|
968
f7f6c15b0ec3
Don't send SSH_MSG_UNIMPLEMENTED for keepalive responses
Matt Johnston <matt@ucc.asn.au>
parents:
941
diff
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|
471 } |
|
f7f6c15b0ec3
Don't send SSH_MSG_UNIMPLEMENTED for keepalive responses
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941
diff
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|
472 |
|
939
a0819ecfee0b
Make -K keepalive behave like OpenSSH's ServerAliveInterval
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diff
changeset
|
473 static void send_msg_keepalive() { |
|
1038
d3925ed45a85
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parents:
1021
diff
changeset
|
474 time_t old_time_idle = ses.last_packet_time_idle; |
|
d3925ed45a85
Fix for old compilers, variable declarations at beginning of functions
Thorsten Horstmann <thorsten.horstmann@web.de>
parents:
1021
diff
changeset
|
475 struct Channel *chan = get_any_ready_channel(); |
|
d3925ed45a85
Fix for old compilers, variable declarations at beginning of functions
Thorsten Horstmann <thorsten.horstmann@web.de>
parents:
1021
diff
changeset
|
476 |
|
454
7e43f5e473b9
- Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents:
452
diff
changeset
|
477 CHECKCLEARTOWRITE(); |
|
970
0bb16232e7c4
Make keepalive handling more robust, this should now match what OpenSSH does
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diff
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|
478 |
|
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Make keepalive handling more robust, this should now match what OpenSSH does
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|
479 if (chan) { |
|
0bb16232e7c4
Make keepalive handling more robust, this should now match what OpenSSH does
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968
diff
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|
480 /* Channel requests are preferable, more implementations |
|
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Make keepalive handling more robust, this should now match what OpenSSH does
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968
diff
changeset
|
481 handle them than SSH_MSG_GLOBAL_REQUEST */ |
|
0bb16232e7c4
Make keepalive handling more robust, this should now match what OpenSSH does
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diff
changeset
|
482 TRACE(("keepalive channel request %d", chan->index)) |
|
0bb16232e7c4
Make keepalive handling more robust, this should now match what OpenSSH does
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diff
changeset
|
483 start_send_channel_request(chan, DROPBEAR_KEEPALIVE_STRING); |
|
0bb16232e7c4
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|
484 } else { |
|
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Make keepalive handling more robust, this should now match what OpenSSH does
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diff
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|
485 TRACE(("keepalive global request")) |
|
0bb16232e7c4
Make keepalive handling more robust, this should now match what OpenSSH does
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968
diff
changeset
|
486 /* Some peers will reply with SSH_MSG_REQUEST_FAILURE, |
|
0bb16232e7c4
Make keepalive handling more robust, this should now match what OpenSSH does
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diff
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|
487 some will reply with SSH_MSG_UNIMPLEMENTED, some will exit. */ |
|
0bb16232e7c4
Make keepalive handling more robust, this should now match what OpenSSH does
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diff
changeset
|
488 buf_putbyte(ses.writepayload, SSH_MSG_GLOBAL_REQUEST); |
|
0bb16232e7c4
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968
diff
changeset
|
489 buf_putstring(ses.writepayload, DROPBEAR_KEEPALIVE_STRING, |
|
0bb16232e7c4
Make keepalive handling more robust, this should now match what OpenSSH does
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diff
changeset
|
490 strlen(DROPBEAR_KEEPALIVE_STRING)); |
|
0bb16232e7c4
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diff
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|
491 } |
|
939
a0819ecfee0b
Make -K keepalive behave like OpenSSH's ServerAliveInterval
Matt Johnston <matt@ucc.asn.au>
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929
diff
changeset
|
492 buf_putbyte(ses.writepayload, 1); /* want_reply */ |
|
454
7e43f5e473b9
- Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents:
452
diff
changeset
|
493 encrypt_packet(); |
|
939
a0819ecfee0b
Make -K keepalive behave like OpenSSH's ServerAliveInterval
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929
diff
changeset
|
494 |
|
a0819ecfee0b
Make -K keepalive behave like OpenSSH's ServerAliveInterval
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929
diff
changeset
|
495 ses.last_packet_time_keepalive_sent = monotonic_now(); |
|
a0819ecfee0b
Make -K keepalive behave like OpenSSH's ServerAliveInterval
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929
diff
changeset
|
496 |
|
a0819ecfee0b
Make -K keepalive behave like OpenSSH's ServerAliveInterval
Matt Johnston <matt@ucc.asn.au>
parents:
929
diff
changeset
|
497 /* keepalives shouldn't update idle timeout, reset it back */ |
|
a0819ecfee0b
Make -K keepalive behave like OpenSSH's ServerAliveInterval
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929
diff
changeset
|
498 ses.last_packet_time_idle = old_time_idle; |
|
454
7e43f5e473b9
- Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents:
452
diff
changeset
|
499 } |
|
7e43f5e473b9
- Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents:
452
diff
changeset
|
500 |
| 26 | 501 /* Check all timeouts which are required. Currently these are the time for |
| 502 * user authentication, and the automatic rekeying. */ | |
| 503 static void checktimeouts() { | |
| 504 | |
|
454
7e43f5e473b9
- Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents:
452
diff
changeset
|
505 time_t now; |
|
928
7cd89d4e0335
Add new monotonic_now() wrapper so that timeouts are unaffected by
Matt Johnston <matt@ucc.asn.au>
parents:
927
diff
changeset
|
506 now = monotonic_now(); |
| 26 | 507 |
|
1139
43a8ea69b24c
Fix problem where auth timeout wasn't checked when waiting for ident
Matt Johnston <matt@ucc.asn.au>
parents:
1124
diff
changeset
|
508 if (IS_DROPBEAR_SERVER && ses.connect_time != 0 |
|
43a8ea69b24c
Fix problem where auth timeout wasn't checked when waiting for ident
Matt Johnston <matt@ucc.asn.au>
parents:
1124
diff
changeset
|
509 && now - ses.connect_time >= AUTH_TIMEOUT) { |
|
43a8ea69b24c
Fix problem where auth timeout wasn't checked when waiting for ident
Matt Johnston <matt@ucc.asn.au>
parents:
1124
diff
changeset
|
510 dropbear_close("Timeout before auth"); |
|
43a8ea69b24c
Fix problem where auth timeout wasn't checked when waiting for ident
Matt Johnston <matt@ucc.asn.au>
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1124
diff
changeset
|
511 } |
|
43a8ea69b24c
Fix problem where auth timeout wasn't checked when waiting for ident
Matt Johnston <matt@ucc.asn.au>
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1124
diff
changeset
|
512 |
| 26 | 513 /* we can't rekey if we haven't done remote ident exchange yet */ |
| 514 if (ses.remoteident == NULL) { | |
| 515 return; | |
| 516 } | |
| 517 | |
| 518 if (!ses.kexstate.sentkexinit | |
|
454
7e43f5e473b9
- Add -K keepalive flag for dropbear and dbclient
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|
519 && (now - ses.kexstate.lastkextime >= KEX_REKEY_TIMEOUT |
|
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|
520 || ses.kexstate.datarecv+ses.kexstate.datatrans >= KEX_REKEY_DATA)) { |
|
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
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135
diff
changeset
|
521 TRACE(("rekeying after timeout or max data reached")) |
| 26 | 522 send_msg_kexinit(); |
| 523 } | |
|
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|
524 |
|
970
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Make keepalive handling more robust, this should now match what OpenSSH does
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|
525 if (opts.keepalive_secs > 0 && ses.authstate.authdone) { |
|
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Make keepalive handling more robust, this should now match what OpenSSH does
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|
526 /* Avoid sending keepalives prior to auth - those are |
|
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|
527 not valid pre-auth packet types */ |
|
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|
528 |
|
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|
529 /* Send keepalives if we've been idle */ |
|
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|
530 if (now - ses.last_packet_time_any_sent >= opts.keepalive_secs) { |
|
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|
531 send_msg_keepalive(); |
|
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|
532 } |
|
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|
533 |
|
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Make -K keepalive behave like OpenSSH's ServerAliveInterval
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534 /* Also send an explicit keepalive message to trigger a response |
|
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|
535 if the remote end hasn't sent us anything */ |
|
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536 if (now - ses.last_packet_time_keepalive_recv >= opts.keepalive_secs |
|
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537 && now - ses.last_packet_time_keepalive_sent >= opts.keepalive_secs) { |
|
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|
538 send_msg_keepalive(); |
|
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|
539 } |
|
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|
540 |
|
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|
541 if (now - ses.last_packet_time_keepalive_recv |
|
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542 >= opts.keepalive_secs * DEFAULT_KEEPALIVE_LIMIT) { |
|
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543 dropbear_exit("Keepalive timeout"); |
|
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544 } |
|
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545 } |
|
513
a3748e54273c
Idle timeout patch from Farrell Aultman. Needs testing, unsure if server
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diff
changeset
|
546 |
|
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547 if (opts.idle_timeout_secs > 0 |
|
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548 && now - ses.last_packet_time_idle >= opts.idle_timeout_secs) { |
|
513
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changeset
|
549 dropbear_close("Idle timeout"); |
|
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550 } |
| 26 | 551 } |
| 552 | |
|
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|
553 static void update_timeout(long limit, long now, long last_event, long * timeout) { |
|
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554 TRACE2(("update_timeout limit %ld, now %ld, last %ld, timeout %ld", |
|
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555 limit, now, last_event, *timeout)) |
|
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556 if (last_event > 0 && limit > 0) { |
|
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557 *timeout = MIN(*timeout, last_event+limit-now); |
|
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|
558 TRACE2(("new timeout %ld", *timeout)) |
|
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559 } |
|
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|
560 } |
|
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|
561 |
|
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- Add -K keepalive flag for dropbear and dbclient
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diff
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|
562 static long select_timeout() { |
|
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changeset
|
563 /* determine the minimum timeout that might be required, so |
|
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diff
changeset
|
564 as to avoid waking when unneccessary */ |
|
1310
090033317ca1
Avoid busy loop while waiting for rekey response
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diff
changeset
|
565 long timeout = KEX_REKEY_TIMEOUT; |
|
1140
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|
566 long now = monotonic_now(); |
|
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|
567 |
|
1310
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diff
changeset
|
568 if (!ses.kexstate.sentkexinit) { |
|
090033317ca1
Avoid busy loop while waiting for rekey response
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parents:
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diff
changeset
|
569 update_timeout(KEX_REKEY_TIMEOUT, now, ses.kexstate.lastkextime, &timeout); |
|
090033317ca1
Avoid busy loop while waiting for rekey response
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|
570 } |
|
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|
571 |
|
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changeset
|
572 if (ses.authstate.authdone != 1 && IS_DROPBEAR_SERVER) { |
|
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573 /* AUTH_TIMEOUT is only relevant before authdone */ |
|
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|
574 update_timeout(AUTH_TIMEOUT, now, ses.connect_time, &timeout); |
|
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|
575 } |
|
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|
576 |
|
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|
577 if (ses.authstate.authdone) { |
|
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changeset
|
578 update_timeout(opts.keepalive_secs, now, |
|
924ff1b959a2
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diff
changeset
|
579 MAX(ses.last_packet_time_keepalive_recv, ses.last_packet_time_keepalive_sent), |
|
924ff1b959a2
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|
580 &timeout); |
|
924ff1b959a2
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|
581 } |
|
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|
582 |
|
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changeset
|
583 update_timeout(opts.idle_timeout_secs, now, ses.last_packet_time_idle, |
|
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|
584 &timeout); |
|
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changeset
|
585 |
|
f6d3a16ecc71
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changeset
|
586 /* clamp negative timeouts to zero - event has already triggered */ |
|
f6d3a16ecc71
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changeset
|
587 return MAX(timeout, 0); |
|
454
7e43f5e473b9
- Add -K keepalive flag for dropbear and dbclient
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diff
changeset
|
588 } |
|
482
7ad49f34a122
- Add run_shell_command() function to run a "sh -c" command, handling
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parents:
479
diff
changeset
|
589 |
|
7ad49f34a122
- Add run_shell_command() function to run a "sh -c" command, handling
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parents:
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diff
changeset
|
590 const char* get_user_shell() { |
|
7ad49f34a122
- Add run_shell_command() function to run a "sh -c" command, handling
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parents:
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diff
changeset
|
591 /* an empty shell should be interpreted as "/bin/sh" */ |
|
7ad49f34a122
- Add run_shell_command() function to run a "sh -c" command, handling
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parents:
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diff
changeset
|
592 if (ses.authstate.pw_shell[0] == '\0') { |
|
7ad49f34a122
- Add run_shell_command() function to run a "sh -c" command, handling
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parents:
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diff
changeset
|
593 return "/bin/sh"; |
|
7ad49f34a122
- Add run_shell_command() function to run a "sh -c" command, handling
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diff
changeset
|
594 } else { |
|
7ad49f34a122
- Add run_shell_command() function to run a "sh -c" command, handling
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479
diff
changeset
|
595 return ses.authstate.pw_shell; |
|
7ad49f34a122
- Add run_shell_command() function to run a "sh -c" command, handling
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diff
changeset
|
596 } |
|
7ad49f34a122
- Add run_shell_command() function to run a "sh -c" command, handling
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diff
changeset
|
597 } |
|
483
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
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parents:
482
diff
changeset
|
598 void fill_passwd(const char* username) { |
|
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
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482
diff
changeset
|
599 struct passwd *pw = NULL; |
|
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
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parents:
482
diff
changeset
|
600 if (ses.authstate.pw_name) |
|
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
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482
diff
changeset
|
601 m_free(ses.authstate.pw_name); |
|
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
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parents:
482
diff
changeset
|
602 if (ses.authstate.pw_dir) |
|
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
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parents:
482
diff
changeset
|
603 m_free(ses.authstate.pw_dir); |
|
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
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parents:
482
diff
changeset
|
604 if (ses.authstate.pw_shell) |
|
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
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482
diff
changeset
|
605 m_free(ses.authstate.pw_shell); |
|
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
482
diff
changeset
|
606 if (ses.authstate.pw_passwd) |
|
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
482
diff
changeset
|
607 m_free(ses.authstate.pw_passwd); |
|
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
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parents:
482
diff
changeset
|
608 |
|
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
482
diff
changeset
|
609 pw = getpwnam(username); |
|
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
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parents:
482
diff
changeset
|
610 if (!pw) { |
|
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
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parents:
482
diff
changeset
|
611 return; |
|
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
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parents:
482
diff
changeset
|
612 } |
|
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
482
diff
changeset
|
613 ses.authstate.pw_uid = pw->pw_uid; |
|
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
482
diff
changeset
|
614 ses.authstate.pw_gid = pw->pw_gid; |
|
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
482
diff
changeset
|
615 ses.authstate.pw_name = m_strdup(pw->pw_name); |
|
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
482
diff
changeset
|
616 ses.authstate.pw_dir = m_strdup(pw->pw_dir); |
|
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
482
diff
changeset
|
617 ses.authstate.pw_shell = m_strdup(pw->pw_shell); |
|
676
0edf08895a33
Return immediate success for blank passwords if allowed
Matt Johnston <matt@ucc.asn.au>
parents:
594
diff
changeset
|
618 { |
|
0edf08895a33
Return immediate success for blank passwords if allowed
Matt Johnston <matt@ucc.asn.au>
parents:
594
diff
changeset
|
619 char *passwd_crypt = pw->pw_passwd; |
|
0edf08895a33
Return immediate success for blank passwords if allowed
Matt Johnston <matt@ucc.asn.au>
parents:
594
diff
changeset
|
620 #ifdef HAVE_SHADOW_H |
|
0edf08895a33
Return immediate success for blank passwords if allowed
Matt Johnston <matt@ucc.asn.au>
parents:
594
diff
changeset
|
621 /* get the shadow password if possible */ |
|
0edf08895a33
Return immediate success for blank passwords if allowed
Matt Johnston <matt@ucc.asn.au>
parents:
594
diff
changeset
|
622 struct spwd *spasswd = getspnam(ses.authstate.pw_name); |
|
0edf08895a33
Return immediate success for blank passwords if allowed
Matt Johnston <matt@ucc.asn.au>
parents:
594
diff
changeset
|
623 if (spasswd && spasswd->sp_pwdp) { |
|
0edf08895a33
Return immediate success for blank passwords if allowed
Matt Johnston <matt@ucc.asn.au>
parents:
594
diff
changeset
|
624 passwd_crypt = spasswd->sp_pwdp; |
|
0edf08895a33
Return immediate success for blank passwords if allowed
Matt Johnston <matt@ucc.asn.au>
parents:
594
diff
changeset
|
625 } |
|
0edf08895a33
Return immediate success for blank passwords if allowed
Matt Johnston <matt@ucc.asn.au>
parents:
594
diff
changeset
|
626 #endif |
|
705
2e573f39b88e
Android returns NULL for pw_crypt, set it to something else
Matt Johnston <matt@ucc.asn.au>
parents:
676
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627 if (!passwd_crypt) { |
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2e573f39b88e
Android returns NULL for pw_crypt, set it to something else
Matt Johnston <matt@ucc.asn.au>
parents:
676
diff
changeset
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628 /* android supposedly returns NULL */ |
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2e573f39b88e
Android returns NULL for pw_crypt, set it to something else
Matt Johnston <matt@ucc.asn.au>
parents:
676
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629 passwd_crypt = "!!"; |
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2e573f39b88e
Android returns NULL for pw_crypt, set it to something else
Matt Johnston <matt@ucc.asn.au>
parents:
676
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630 } |
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676
0edf08895a33
Return immediate success for blank passwords if allowed
Matt Johnston <matt@ucc.asn.au>
parents:
594
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631 ses.authstate.pw_passwd = m_strdup(passwd_crypt); |
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0edf08895a33
Return immediate success for blank passwords if allowed
Matt Johnston <matt@ucc.asn.au>
parents:
594
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632 } |
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483
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
482
diff
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633 } |
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738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
482
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634 |
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941
5daedffd0769
Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents:
940
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635 /* Called when channels are modified */ |
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5daedffd0769
Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents:
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636 void update_channel_prio() { |
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5daedffd0769
Set tcp priority as follows:
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637 enum dropbear_prio new_prio; |
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5daedffd0769
Set tcp priority as follows:
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638 int any = 0; |
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5daedffd0769
Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents:
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639 unsigned int i; |
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5daedffd0769
Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents:
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640 |
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5daedffd0769
Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents:
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641 TRACE(("update_channel_prio")) |
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5daedffd0769
Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents:
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642 |
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1031
64c0aa01e2b6
Update priority once the socket is open
Matt Johnston <matt@ucc.asn.au>
parents:
1025
diff
changeset
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643 if (ses.sock_out < 0) { |
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64c0aa01e2b6
Update priority once the socket is open
Matt Johnston <matt@ucc.asn.au>
parents:
1025
diff
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644 TRACE(("leave update_channel_prio: no socket")) |
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64c0aa01e2b6
Update priority once the socket is open
Matt Johnston <matt@ucc.asn.au>
parents:
1025
diff
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645 return; |
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64c0aa01e2b6
Update priority once the socket is open
Matt Johnston <matt@ucc.asn.au>
parents:
1025
diff
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646 } |
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64c0aa01e2b6
Update priority once the socket is open
Matt Johnston <matt@ucc.asn.au>
parents:
1025
diff
changeset
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647 |
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941
5daedffd0769
Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents:
940
diff
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648 new_prio = DROPBEAR_PRIO_BULK; |
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5daedffd0769
Set tcp priority as follows:
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parents:
940
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649 for (i = 0; i < ses.chansize; i++) { |
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5daedffd0769
Set tcp priority as follows:
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parents:
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diff
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650 struct Channel *channel = ses.channels[i]; |
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5daedffd0769
Set tcp priority as follows:
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parents:
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651 if (!channel || channel->prio == DROPBEAR_CHANNEL_PRIO_EARLY) { |
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5daedffd0769
Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents:
940
diff
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652 if (channel && channel->prio == DROPBEAR_CHANNEL_PRIO_EARLY) { |
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5daedffd0769
Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents:
940
diff
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653 TRACE(("update_channel_prio: early %d", channel->index)) |
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5daedffd0769
Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents:
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diff
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654 } |
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5daedffd0769
Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents:
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655 continue; |
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5daedffd0769
Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents:
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656 } |
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5daedffd0769
Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents:
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657 any = 1; |
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5daedffd0769
Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents:
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658 if (channel->prio == DROPBEAR_CHANNEL_PRIO_INTERACTIVE) |
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5daedffd0769
Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents:
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diff
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659 { |
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5daedffd0769
Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents:
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diff
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660 TRACE(("update_channel_prio: lowdelay %d", channel->index)) |
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5daedffd0769
Set tcp priority as follows:
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parents:
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diff
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661 new_prio = DROPBEAR_PRIO_LOWDELAY; |
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5daedffd0769
Set tcp priority as follows:
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parents:
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diff
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662 break; |
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5daedffd0769
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parents:
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diff
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663 } else if (channel->prio == DROPBEAR_CHANNEL_PRIO_UNKNOWABLE |
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5daedffd0769
Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents:
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diff
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664 && new_prio == DROPBEAR_PRIO_BULK) |
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5daedffd0769
Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents:
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diff
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665 { |
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5daedffd0769
Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents:
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diff
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666 TRACE(("update_channel_prio: unknowable %d", channel->index)) |
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5daedffd0769
Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents:
940
diff
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667 new_prio = DROPBEAR_PRIO_DEFAULT; |
|
5daedffd0769
Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents:
940
diff
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668 } |
|
5daedffd0769
Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents:
940
diff
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669 } |
|
5daedffd0769
Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents:
940
diff
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|
670 |
|
5daedffd0769
Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents:
940
diff
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|
671 if (any == 0) { |
|
5daedffd0769
Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents:
940
diff
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672 /* lowdelay during setup */ |
|
5daedffd0769
Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents:
940
diff
changeset
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673 TRACE(("update_channel_prio: not any")) |
|
5daedffd0769
Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents:
940
diff
changeset
|
674 new_prio = DROPBEAR_PRIO_LOWDELAY; |
|
5daedffd0769
Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents:
940
diff
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|
675 } |
|
5daedffd0769
Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents:
940
diff
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|
676 |
|
5daedffd0769
Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents:
940
diff
changeset
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677 if (new_prio != ses.socket_prio) { |
|
1020
363c0feca5d4
Fix print that no longer works since we're not using fourCCs
Matt Johnston <matt@ucc.asn.au>
parents:
970
diff
changeset
|
678 TRACE(("Dropbear priority transitioning %d -> %d", ses.socket_prio, new_prio)) |
|
941
5daedffd0769
Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents:
940
diff
changeset
|
679 set_sock_priority(ses.sock_out, new_prio); |
|
5daedffd0769
Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents:
940
diff
changeset
|
680 ses.socket_prio = new_prio; |
|
5daedffd0769
Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents:
940
diff
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|
681 } |
|
5daedffd0769
Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents:
940
diff
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|
682 } |
|
5daedffd0769
Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents:
940
diff
changeset
|
683 |