annotate netio.c @ 1476:8305ebe45940

Put Dropbear config in a separate file Patch out MECC DER
author Matt Johnston <matt@ucc.asn.au>
date Fri, 09 Feb 2018 23:35:07 +0800
parents f787f60f8e45
children 2d450c1056e3
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1 #include "netio.h"
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2 #include "list.h"
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3 #include "dbutil.h"
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4 #include "session.h"
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5 #include "debug.h"
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6
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7 struct dropbear_progress_connection {
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8 struct addrinfo *res;
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9 struct addrinfo *res_iter;
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10
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11 char *remotehost, *remoteport; /* For error reporting */
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12
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13 connect_callback cb;
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14 void *cb_data;
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15
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16 struct Queue *writequeue; /* A queue of encrypted packets to send with TCP fastopen,
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17 or NULL. */
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18
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19 int sock;
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20
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21 char* errstring;
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22 char *bind_address, *bind_port;
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23 };
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24
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25 /* Deallocate a progress connection. Removes from the pending list if iter!=NULL.
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26 Does not close sockets */
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27 static void remove_connect(struct dropbear_progress_connection *c, m_list_elem *iter) {
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28 if (c->res) {
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29 freeaddrinfo(c->res);
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30 }
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31 m_free(c->remotehost);
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32 m_free(c->remoteport);
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33 m_free(c->errstring);
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34 m_free(c->bind_address);
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35 m_free(c->bind_port);
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36 m_free(c);
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37
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38 if (iter) {
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39 list_remove(iter);
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40 }
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41 }
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42
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43 static void cancel_callback(int result, int sock, void* UNUSED(data), const char* UNUSED(errstring)) {
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44 if (result == DROPBEAR_SUCCESS)
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45 {
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46 m_close(sock);
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47 }
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48 }
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49
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50 void cancel_connect(struct dropbear_progress_connection *c) {
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51 c->cb = cancel_callback;
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52 c->cb_data = NULL;
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53 }
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54
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55 static void connect_try_next(struct dropbear_progress_connection *c) {
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56 struct addrinfo *r;
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57 int err;
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58 int res = 0;
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59 int fastopen = 0;
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60 #if DROPBEAR_CLIENT_TCP_FAST_OPEN
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61 struct msghdr message;
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62 #endif
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63
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64 for (r = c->res_iter; r; r = r->ai_next)
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65 {
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66 dropbear_assert(c->sock == -1);
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67
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68 c->sock = socket(r->ai_family, r->ai_socktype, r->ai_protocol);
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69 if (c->sock < 0) {
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70 continue;
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71 }
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72
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73 if (c->bind_address || c->bind_port) {
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74 /* bind to a source port/address */
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75 struct addrinfo hints;
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76 struct addrinfo *bindaddr = NULL;
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77 memset(&hints, 0, sizeof(hints));
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78 hints.ai_socktype = SOCK_STREAM;
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79 hints.ai_family = r->ai_family;
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80 hints.ai_flags = AI_PASSIVE;
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81
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82 err = getaddrinfo(c->bind_address, c->bind_port, &hints, &bindaddr);
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83 if (err) {
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84 int len = 100 + strlen(gai_strerror(err));
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85 m_free(c->errstring);
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86 c->errstring = (char*)m_malloc(len);
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87 snprintf(c->errstring, len, "Error resolving bind address '%s' (port %s). %s",
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88 c->bind_address, c->bind_port, gai_strerror(err));
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89 TRACE(("Error resolving bind: %s", gai_strerror(err)))
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90 close(c->sock);
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91 c->sock = -1;
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92 continue;
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93 }
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94 res = bind(c->sock, bindaddr->ai_addr, bindaddr->ai_addrlen);
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95 freeaddrinfo(bindaddr);
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96 bindaddr = NULL;
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97 if (res < 0) {
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98 /* failure */
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99 int keep_errno = errno;
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100 int len = 300;
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101 m_free(c->errstring);
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102 c->errstring = m_malloc(len);
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103 snprintf(c->errstring, len, "Error binding local address '%s' (port %s). %s",
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104 c->bind_address, c->bind_port, strerror(keep_errno));
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105 close(c->sock);
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106 c->sock = -1;
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107 continue;
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108 }
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109 }
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110
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111 ses.maxfd = MAX(ses.maxfd, c->sock);
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112 set_sock_nodelay(c->sock);
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113 setnonblocking(c->sock);
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114
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115 #if DROPBEAR_CLIENT_TCP_FAST_OPEN
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116 fastopen = (c->writequeue != NULL);
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117
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118 if (fastopen) {
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119 memset(&message, 0x0, sizeof(message));
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120 message.msg_name = r->ai_addr;
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121 message.msg_namelen = r->ai_addrlen;
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122 /* 6 is arbitrary, enough to hold initial packets */
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123 unsigned int iovlen = 6; /* Linux msg_iovlen is a size_t */
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124 struct iovec iov[6];
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125 packet_queue_to_iovec(c->writequeue, iov, &iovlen);
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126 message.msg_iov = iov;
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127 message.msg_iovlen = iovlen;
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128 res = sendmsg(c->sock, &message, MSG_FASTOPEN);
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129 /* Returns EINPROGRESS if FASTOPEN wasn't available */
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130 if (res < 0) {
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131 if (errno != EINPROGRESS) {
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132 m_free(c->errstring);
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133 c->errstring = m_strdup(strerror(errno));
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134 /* Not entirely sure which kind of errors are normal - 2.6.32 seems to
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135 return EPIPE for any (nonblocking?) sendmsg(). just fall back */
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136 TRACE(("sendmsg tcp_fastopen failed, falling back. %s", strerror(errno)));
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137 /* No kernel MSG_FASTOPEN support. Fall back below */
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138 fastopen = 0;
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139 /* Set to NULL to avoid trying again */
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140 c->writequeue = NULL;
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141 }
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142 } else {
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143 packet_queue_consume(c->writequeue, res);
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144 }
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145 }
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parents:
diff changeset
146 #endif
1033
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parents: 1032
diff changeset
147
ca71904cf3ee Fixes for backwards compatibility
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parents: 1032
diff changeset
148 /* Normal connect(), used as fallback for TCP fastopen too */
ca71904cf3ee Fixes for backwards compatibility
Matt Johnston <matt@ucc.asn.au>
parents: 1032
diff changeset
149 if (!fastopen) {
ca71904cf3ee Fixes for backwards compatibility
Matt Johnston <matt@ucc.asn.au>
parents: 1032
diff changeset
150 res = connect(c->sock, r->ai_addr, r->ai_addrlen);
ca71904cf3ee Fixes for backwards compatibility
Matt Johnston <matt@ucc.asn.au>
parents: 1032
diff changeset
151 }
ca71904cf3ee Fixes for backwards compatibility
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parents: 1032
diff changeset
152
ca71904cf3ee Fixes for backwards compatibility
Matt Johnston <matt@ucc.asn.au>
parents: 1032
diff changeset
153 if (res < 0 && errno != EINPROGRESS) {
1035
8ed1d37e75a6 get rid of some unnecessary code
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parents: 1034
diff changeset
154 /* failure */
1065
23103e1e9548 Fix error handling for dbclient async connect
Matt Johnston <matt@ucc.asn.au>
parents: 1053
diff changeset
155 m_free(c->errstring);
23103e1e9548 Fix error handling for dbclient async connect
Matt Johnston <matt@ucc.asn.au>
parents: 1053
diff changeset
156 c->errstring = m_strdup(strerror(errno));
1033
ca71904cf3ee Fixes for backwards compatibility
Matt Johnston <matt@ucc.asn.au>
parents: 1032
diff changeset
157 close(c->sock);
ca71904cf3ee Fixes for backwards compatibility
Matt Johnston <matt@ucc.asn.au>
parents: 1032
diff changeset
158 c->sock = -1;
ca71904cf3ee Fixes for backwards compatibility
Matt Johnston <matt@ucc.asn.au>
parents: 1032
diff changeset
159 continue;
ca71904cf3ee Fixes for backwards compatibility
Matt Johnston <matt@ucc.asn.au>
parents: 1032
diff changeset
160 } else {
1035
8ed1d37e75a6 get rid of some unnecessary code
Matt Johnston <matt@ucc.asn.au>
parents: 1034
diff changeset
161 /* new connection was successful, wait for it to complete */
1033
ca71904cf3ee Fixes for backwards compatibility
Matt Johnston <matt@ucc.asn.au>
parents: 1032
diff changeset
162 break;
ca71904cf3ee Fixes for backwards compatibility
Matt Johnston <matt@ucc.asn.au>
parents: 1032
diff changeset
163 }
1032
0da8ba489c23 Move generic network routines to netio.c
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parents:
diff changeset
164 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
165
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
166 if (r) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
167 c->res_iter = r->ai_next;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
168 } else {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
169 c->res_iter = NULL;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
170 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
171 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
172
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
173 /* Connect via TCP to a host. */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
174 struct dropbear_progress_connection *connect_remote(const char* remotehost, const char* remoteport,
1466
f787f60f8e45 bind to port as well with -b
Matt Johnston <matt@ucc.asn.au>
parents: 1465
diff changeset
175 connect_callback cb, void* cb_data,
f787f60f8e45 bind to port as well with -b
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parents: 1465
diff changeset
176 const char* bind_address, const char* bind_port)
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
177 {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
178 struct dropbear_progress_connection *c = NULL;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
179 int err;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
180 struct addrinfo hints;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
181
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
182 c = m_malloc(sizeof(*c));
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
183 c->remotehost = m_strdup(remotehost);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
184 c->remoteport = m_strdup(remoteport);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
185 c->sock = -1;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
186 c->cb = cb;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
187 c->cb_data = cb_data;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
188
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
189 list_append(&ses.conn_pending, c);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
190
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
191 memset(&hints, 0, sizeof(hints));
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
192 hints.ai_socktype = SOCK_STREAM;
1078
b3b772646974 Should be AF_UNSPEC not PF_UNSPEC
Matt Johnston <matt@ucc.asn.au>
parents: 1076
diff changeset
193 hints.ai_family = AF_UNSPEC;
1032
0da8ba489c23 Move generic network routines to netio.c
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parents:
diff changeset
194
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
195 err = getaddrinfo(remotehost, remoteport, &hints, &c->res);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
196 if (err) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
197 int len;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
198 len = 100 + strlen(gai_strerror(err));
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
199 c->errstring = (char*)m_malloc(len);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
200 snprintf(c->errstring, len, "Error resolving '%s' port '%s'. %s",
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
201 remotehost, remoteport, gai_strerror(err));
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
202 TRACE(("Error resolving: %s", gai_strerror(err)))
1053
fd3712d1ff7f Better failure handling
Matt Johnston <matt@ucc.asn.au>
parents: 1050
diff changeset
203 } else {
fd3712d1ff7f Better failure handling
Matt Johnston <matt@ucc.asn.au>
parents: 1050
diff changeset
204 c->res_iter = c->res;
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
205 }
1465
f7a53832501d cli_bind_address_connect
houseofkodai <karthik@houseofkodai.in>
parents: 1464
diff changeset
206
1466
f787f60f8e45 bind to port as well with -b
Matt Johnston <matt@ucc.asn.au>
parents: 1465
diff changeset
207 if (bind_address) {
f787f60f8e45 bind to port as well with -b
Matt Johnston <matt@ucc.asn.au>
parents: 1465
diff changeset
208 c->bind_address = m_strdup(bind_address);
f787f60f8e45 bind to port as well with -b
Matt Johnston <matt@ucc.asn.au>
parents: 1465
diff changeset
209 }
f787f60f8e45 bind to port as well with -b
Matt Johnston <matt@ucc.asn.au>
parents: 1465
diff changeset
210 if (bind_port) {
f787f60f8e45 bind to port as well with -b
Matt Johnston <matt@ucc.asn.au>
parents: 1465
diff changeset
211 c->bind_port = m_strdup(bind_port);
1465
f7a53832501d cli_bind_address_connect
houseofkodai <karthik@houseofkodai.in>
parents: 1464
diff changeset
212 }
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
213
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
214 return c;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
215 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
216
1050
c2a50c9f509e Add cleanup
Matt Johnston <matt@ucc.asn.au>
parents: 1048
diff changeset
217 void remove_connect_pending() {
c2a50c9f509e Add cleanup
Matt Johnston <matt@ucc.asn.au>
parents: 1048
diff changeset
218 while (ses.conn_pending.first) {
c2a50c9f509e Add cleanup
Matt Johnston <matt@ucc.asn.au>
parents: 1048
diff changeset
219 struct dropbear_progress_connection *c = ses.conn_pending.first->item;
c2a50c9f509e Add cleanup
Matt Johnston <matt@ucc.asn.au>
parents: 1048
diff changeset
220 remove_connect(c, ses.conn_pending.first);
c2a50c9f509e Add cleanup
Matt Johnston <matt@ucc.asn.au>
parents: 1048
diff changeset
221 }
c2a50c9f509e Add cleanup
Matt Johnston <matt@ucc.asn.au>
parents: 1048
diff changeset
222 }
c2a50c9f509e Add cleanup
Matt Johnston <matt@ucc.asn.au>
parents: 1048
diff changeset
223
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
224
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
225 void set_connect_fds(fd_set *writefd) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
226 m_list_elem *iter;
1152
57d09741d46d avoid invalidated iterator when connection fails
Matt Johnston <matt@ucc.asn.au>
parents: 1136
diff changeset
227 TRACE(("enter set_connect_fds"))
57d09741d46d avoid invalidated iterator when connection fails
Matt Johnston <matt@ucc.asn.au>
parents: 1136
diff changeset
228 iter = ses.conn_pending.first;
57d09741d46d avoid invalidated iterator when connection fails
Matt Johnston <matt@ucc.asn.au>
parents: 1136
diff changeset
229 while (iter) {
57d09741d46d avoid invalidated iterator when connection fails
Matt Johnston <matt@ucc.asn.au>
parents: 1136
diff changeset
230 m_list_elem *next_iter = iter->next;
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
231 struct dropbear_progress_connection *c = iter->item;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
232 /* Set one going */
1152
57d09741d46d avoid invalidated iterator when connection fails
Matt Johnston <matt@ucc.asn.au>
parents: 1136
diff changeset
233 while (c->res_iter && c->sock < 0) {
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
234 connect_try_next(c);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
235 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
236 if (c->sock >= 0) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
237 FD_SET(c->sock, writefd);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
238 } else {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
239 /* Final failure */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
240 if (!c->errstring) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
241 c->errstring = m_strdup("unexpected failure");
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
242 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
243 c->cb(DROPBEAR_FAILURE, -1, c->cb_data, c->errstring);
1152
57d09741d46d avoid invalidated iterator when connection fails
Matt Johnston <matt@ucc.asn.au>
parents: 1136
diff changeset
244 remove_connect(c, iter);
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
245 }
1152
57d09741d46d avoid invalidated iterator when connection fails
Matt Johnston <matt@ucc.asn.au>
parents: 1136
diff changeset
246 iter = next_iter;
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
247 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
248 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
249
1459
06d52bcb8094 Pointer parameter could be declared as pointing to const
Francois Perrad <francois.perrad@gadz.org>
parents: 1426
diff changeset
250 void handle_connect_fds(const fd_set *writefd) {
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
251 m_list_elem *iter;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
252 TRACE(("enter handle_connect_fds"))
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
253 for (iter = ses.conn_pending.first; iter; iter = iter->next) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
254 int val;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
255 socklen_t vallen = sizeof(val);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
256 struct dropbear_progress_connection *c = iter->item;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
257
1053
fd3712d1ff7f Better failure handling
Matt Johnston <matt@ucc.asn.au>
parents: 1050
diff changeset
258 if (c->sock < 0 || !FD_ISSET(c->sock, writefd)) {
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
259 continue;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
260 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
261
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
262 TRACE(("handling %s port %s socket %d", c->remotehost, c->remoteport, c->sock));
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
263
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
264 if (getsockopt(c->sock, SOL_SOCKET, SO_ERROR, &val, &vallen) != 0) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
265 TRACE(("handle_connect_fds getsockopt(%d) SO_ERROR failed: %s", c->sock, strerror(errno)))
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
266 /* This isn't expected to happen - Unix has surprises though, continue gracefully. */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
267 m_close(c->sock);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
268 c->sock = -1;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
269 } else if (val != 0) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
270 /* Connect failed */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
271 TRACE(("connect to %s port %s failed.", c->remotehost, c->remoteport))
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
272 m_close(c->sock);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
273 c->sock = -1;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
274
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
275 m_free(c->errstring);
1066
cce03ea8e6eb strdup strerror
Matt Johnston <matt@ucc.asn.au>
parents: 1065
diff changeset
276 c->errstring = m_strdup(strerror(val));
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
277 } else {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
278 /* New connection has been established */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
279 c->cb(DROPBEAR_SUCCESS, c->sock, c->cb_data, NULL);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
280 remove_connect(c, iter);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
281 TRACE(("leave handle_connect_fds - success"))
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
282 /* Must return here - remove_connect() invalidates iter */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
283 return;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
284 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
285 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
286 TRACE(("leave handle_connect_fds - end iter"))
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
287 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
288
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
289 void connect_set_writequeue(struct dropbear_progress_connection *c, struct Queue *writequeue) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
290 c->writequeue = writequeue;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
291 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
292
1459
06d52bcb8094 Pointer parameter could be declared as pointing to const
Francois Perrad <francois.perrad@gadz.org>
parents: 1426
diff changeset
293 void packet_queue_to_iovec(const struct Queue *queue, struct iovec *iov, unsigned int *iov_count) {
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
294 struct Link *l;
1034
107b013e9d9d avoid some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1033
diff changeset
295 unsigned int i;
1032
0da8ba489c23 Move generic network routines to netio.c
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parents:
diff changeset
296 int len;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
297 buffer *writebuf;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
298
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
299 #ifndef IOV_MAX
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
300 #define IOV_MAX UIO_MAXIOV
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
301 #endif
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
302
1072
686cd3e8e13e avoid malloc for iovec
Matt Johnston <matt@ucc.asn.au>
parents: 1067
diff changeset
303 *iov_count = MIN(MIN(queue->count, IOV_MAX), *iov_count);
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
304
1073
88043f9d40bd Fix when iov queue is large
Matt Johnston <matt@ucc.asn.au>
parents: 1072
diff changeset
305 for (l = queue->head, i = 0; i < *iov_count; l = l->link, i++)
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
306 {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
307 writebuf = (buffer*)l->item;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
308 len = writebuf->len - 1 - writebuf->pos;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
309 dropbear_assert(len > 0);
1034
107b013e9d9d avoid some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1033
diff changeset
310 TRACE2(("write_packet writev #%d type %d len %d/%d", i, writebuf->data[writebuf->len-1],
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
311 len, writebuf->len-1))
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
312 iov[i].iov_base = buf_getptr(writebuf, len);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
313 iov[i].iov_len = len;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
314 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
315 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
316
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
317 void packet_queue_consume(struct Queue *queue, ssize_t written) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
318 buffer *writebuf;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
319 int len;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
320 while (written > 0) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
321 writebuf = (buffer*)examine(queue);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
322 len = writebuf->len - 1 - writebuf->pos;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
323 if (len > written) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
324 /* partial buffer write */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
325 buf_incrpos(writebuf, written);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
326 written = 0;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
327 } else {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
328 written -= len;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
329 dequeue(queue);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
330 buf_free(writebuf);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
331 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
332 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
333 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
334
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
335 void set_sock_nodelay(int sock) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
336 int val;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
337
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
338 /* disable nagle */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
339 val = 1;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
340 setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, (void*)&val, sizeof(val));
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
341 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
342
1295
750ec4ec4cbe Convert #ifdef to #if, other build changes
Matt Johnston <matt@ucc.asn.au>
parents: 1152
diff changeset
343 #if DROPBEAR_SERVER_TCP_FAST_OPEN
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
344 void set_listen_fast_open(int sock) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
345 int qlen = MAX(MAX_UNAUTH_PER_IP, 5);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
346 if (setsockopt(sock, SOL_TCP, TCP_FASTOPEN, &qlen, sizeof(qlen)) != 0) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
347 TRACE(("set_listen_fast_open failed for socket %d: %s", sock, strerror(errno)))
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
348 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
349 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
350
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
351 #endif
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
352
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
353 void set_sock_priority(int sock, enum dropbear_prio prio) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
354
1034
107b013e9d9d avoid some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1033
diff changeset
355 int rc;
107b013e9d9d avoid some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1033
diff changeset
356 #ifdef IPTOS_LOWDELAY
107b013e9d9d avoid some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1033
diff changeset
357 int iptos_val = 0;
107b013e9d9d avoid some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1033
diff changeset
358 #endif
1426
89f8c5960527 test for linux/pkt-sched.h rather than SO_PRIORITY
Matt Johnston <matt@ucc.asn.au>
parents: 1316
diff changeset
359 #ifdef HAVE_LINUX_PKT_SCHED_H
1034
107b013e9d9d avoid some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1033
diff changeset
360 int so_prio_val = 0;
107b013e9d9d avoid some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1033
diff changeset
361 #endif
107b013e9d9d avoid some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1033
diff changeset
362
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
363
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
364 /* Don't log ENOTSOCK errors so that this can harmlessly be called
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
365 * on a client '-J' proxy pipe */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
366
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
367 /* set the TOS bit for either ipv4 or ipv6 */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
368 #ifdef IPTOS_LOWDELAY
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
369 if (prio == DROPBEAR_PRIO_LOWDELAY) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
370 iptos_val = IPTOS_LOWDELAY;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
371 } else if (prio == DROPBEAR_PRIO_BULK) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
372 iptos_val = IPTOS_THROUGHPUT;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
373 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
374 #if defined(IPPROTO_IPV6) && defined(IPV6_TCLASS)
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
375 rc = setsockopt(sock, IPPROTO_IPV6, IPV6_TCLASS, (void*)&iptos_val, sizeof(iptos_val));
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
376 if (rc < 0 && errno != ENOTSOCK) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
377 TRACE(("Couldn't set IPV6_TCLASS (%s)", strerror(errno)));
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
378 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
379 #endif
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
380 rc = setsockopt(sock, IPPROTO_IP, IP_TOS, (void*)&iptos_val, sizeof(iptos_val));
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
381 if (rc < 0 && errno != ENOTSOCK) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
382 TRACE(("Couldn't set IP_TOS (%s)", strerror(errno)));
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
383 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
384 #endif
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
385
1426
89f8c5960527 test for linux/pkt-sched.h rather than SO_PRIORITY
Matt Johnston <matt@ucc.asn.au>
parents: 1316
diff changeset
386 #ifdef HAVE_LINUX_PKT_SCHED_H
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
387 if (prio == DROPBEAR_PRIO_LOWDELAY) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
388 so_prio_val = TC_PRIO_INTERACTIVE;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
389 } else if (prio == DROPBEAR_PRIO_BULK) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
390 so_prio_val = TC_PRIO_BULK;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
391 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
392 /* linux specific, sets QoS class. see tc-prio(8) */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
393 rc = setsockopt(sock, SOL_SOCKET, SO_PRIORITY, (void*) &so_prio_val, sizeof(so_prio_val));
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
394 if (rc < 0 && errno != ENOTSOCK)
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
395 dropbear_log(LOG_WARNING, "Couldn't set SO_PRIORITY (%s)",
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
396 strerror(errno));
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
397 #endif
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
398
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
399 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
400
1464
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
401 /* from openssh/canohost.c avoid premature-optimization */
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
402 int get_sock_port(int sock) {
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
403 struct sockaddr_storage from;
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
404 socklen_t fromlen;
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
405 char strport[NI_MAXSERV];
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
406 int r;
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
407
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
408 /* Get IP address of client. */
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
409 fromlen = sizeof(from);
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
410 memset(&from, 0, sizeof(from));
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
411 if (getsockname(sock, (struct sockaddr *)&from, &fromlen) < 0) {
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
412 TRACE(("getsockname failed: %d", errno))
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
413 return 0;
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
414 }
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
415
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
416 /* Work around Linux IPv6 weirdness */
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
417 if (from.ss_family == AF_INET6)
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
418 fromlen = sizeof(struct sockaddr_in6);
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
419
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
420 /* Non-inet sockets don't have a port number. */
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
421 if (from.ss_family != AF_INET && from.ss_family != AF_INET6)
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
422 return 0;
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
423
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
424 /* Return port number. */
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
425 if ((r = getnameinfo((struct sockaddr *)&from, fromlen, NULL, 0,
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
426 strport, sizeof(strport), NI_NUMERICSERV)) != 0) {
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
427 TRACE(("netio.c/get_sock_port/getnameinfo NI_NUMERICSERV failed: %d", r))
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
428 }
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
429 return atoi(strport);
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
430 }
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
431
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
432 /* Listen on address:port.
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
433 * Special cases are address of "" listening on everything,
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
434 * and address of NULL listening on localhost only.
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
435 * Returns the number of sockets bound on success, or -1 on failure. On
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
436 * failure, if errstring wasn't NULL, it'll be a newly malloced error
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
437 * string.*/
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
438 int dropbear_listen(const char* address, const char* port,
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
439 int *socks, unsigned int sockcount, char **errstring, int *maxfd) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
440
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
441 struct addrinfo hints, *res = NULL, *res0 = NULL;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
442 int err;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
443 unsigned int nsock;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
444 struct linger linger;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
445 int val;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
446 int sock;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
447
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
448 TRACE(("enter dropbear_listen"))
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
449
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
450 memset(&hints, 0, sizeof(hints));
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
451 hints.ai_family = AF_UNSPEC; /* TODO: let them flag v4 only etc */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
452 hints.ai_socktype = SOCK_STREAM;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
453
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
454 /* for calling getaddrinfo:
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
455 address == NULL and !AI_PASSIVE: local loopback
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
456 address == NULL and AI_PASSIVE: all interfaces
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
457 address != NULL: whatever the address says */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
458 if (!address) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
459 TRACE(("dropbear_listen: local loopback"))
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
460 } else {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
461 if (address[0] == '\0') {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
462 TRACE(("dropbear_listen: all interfaces"))
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
463 address = NULL;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
464 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
465 hints.ai_flags = AI_PASSIVE;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
466 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
467 err = getaddrinfo(address, port, &hints, &res0);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
468
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
469 if (err) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
470 if (errstring != NULL && *errstring == NULL) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
471 int len;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
472 len = 20 + strlen(gai_strerror(err));
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
473 *errstring = (char*)m_malloc(len);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
474 snprintf(*errstring, len, "Error resolving: %s", gai_strerror(err));
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
475 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
476 if (res0) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
477 freeaddrinfo(res0);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
478 res0 = NULL;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
479 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
480 TRACE(("leave dropbear_listen: failed resolving"))
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
481 return -1;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
482 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
483
1464
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
484 /*
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
485 * when listening on server-assigned-port 0
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
486 * the assigned ports may differ for address families (v4/v6)
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
487 * causing problems for tcpip-forward
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
488 * caller can do a get_socket_address to discover assigned-port
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
489 * hence, use same port for all address families
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
490 */
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
491 u_int16_t *allocated_lport_p = 0;
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
492 int allocated_lport = 0;
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
493
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
494 nsock = 0;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
495 for (res = res0; res != NULL && nsock < sockcount;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
496 res = res->ai_next) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
497
1464
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
498 if (allocated_lport > 0) {
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
499 if (AF_INET == res->ai_family) {
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
500 allocated_lport_p = &((struct sockaddr_in *)res->ai_addr)->sin_port;
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
501 } else if (AF_INET6 == res->ai_family) {
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
502 allocated_lport_p = &((struct sockaddr_in6 *)res->ai_addr)->sin6_port;
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
503 }
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
504 *allocated_lport_p = htons(allocated_lport);
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
505 }
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
506
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
507 /* Get a socket */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
508 socks[nsock] = socket(res->ai_family, res->ai_socktype,
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
509 res->ai_protocol);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
510
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
511 sock = socks[nsock]; /* For clarity */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
512
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
513 if (sock < 0) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
514 err = errno;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
515 TRACE(("socket() failed"))
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
516 continue;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
517 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
518
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
519 /* Various useful socket options */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
520 val = 1;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
521 /* set to reuse, quick timeout */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
522 setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (void*) &val, sizeof(val));
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
523 linger.l_onoff = 1;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
524 linger.l_linger = 5;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
525 setsockopt(sock, SOL_SOCKET, SO_LINGER, (void*)&linger, sizeof(linger));
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
526
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
527 #if defined(IPPROTO_IPV6) && defined(IPV6_V6ONLY)
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
528 if (res->ai_family == AF_INET6) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
529 int on = 1;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
530 if (setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY,
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
531 &on, sizeof(on)) == -1) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
532 dropbear_log(LOG_WARNING, "Couldn't set IPV6_V6ONLY");
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
533 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
534 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
535 #endif
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
536
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
537 set_sock_nodelay(sock);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
538
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
539 if (bind(sock, res->ai_addr, res->ai_addrlen) < 0) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
540 err = errno;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
541 close(sock);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
542 TRACE(("bind(%s) failed", port))
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
543 continue;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
544 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
545
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
546 if (listen(sock, DROPBEAR_LISTEN_BACKLOG) < 0) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
547 err = errno;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
548 close(sock);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
549 TRACE(("listen() failed"))
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
550 continue;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
551 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
552
1464
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
553 if (0 == allocated_lport) {
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
554 allocated_lport = get_sock_port(sock);
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
555 }
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
556
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
557 *maxfd = MAX(*maxfd, sock);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
558
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
559 nsock++;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
560 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
561
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
562 if (res0) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
563 freeaddrinfo(res0);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
564 res0 = NULL;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
565 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
566
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
567 if (nsock == 0) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
568 if (errstring != NULL && *errstring == NULL) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
569 int len;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
570 len = 20 + strlen(strerror(err));
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
571 *errstring = (char*)m_malloc(len);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
572 snprintf(*errstring, len, "Error listening: %s", strerror(err));
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
573 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
574 TRACE(("leave dropbear_listen: failure, %s", strerror(err)))
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
575 return -1;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
576 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
577
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
578 TRACE(("leave dropbear_listen: success, %d socks bound", nsock))
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
579 return nsock;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
580 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
581
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
582 void get_socket_address(int fd, char **local_host, char **local_port,
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
583 char **remote_host, char **remote_port, int host_lookup)
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
584 {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
585 struct sockaddr_storage addr;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
586 socklen_t addrlen;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
587
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
588 if (local_host || local_port) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
589 addrlen = sizeof(addr);
0da8ba489c23 Move generic network routines to netio.c
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590 if (getsockname(fd, (struct sockaddr*)&addr, &addrlen) < 0) {
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591 dropbear_exit("Failed socket address: %s", strerror(errno));
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Matt Johnston <matt@ucc.asn.au>
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592 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
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593 getaddrstring(&addr, local_host, local_port, host_lookup);
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Matt Johnston <matt@ucc.asn.au>
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594 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
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595 if (remote_host || remote_port) {
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596 addrlen = sizeof(addr);
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597 if (getpeername(fd, (struct sockaddr*)&addr, &addrlen) < 0) {
0da8ba489c23 Move generic network routines to netio.c
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598 dropbear_exit("Failed socket address: %s", strerror(errno));
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Matt Johnston <matt@ucc.asn.au>
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diff changeset
599 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
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diff changeset
600 getaddrstring(&addr, remote_host, remote_port, host_lookup);
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601 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
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602 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
603
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
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604 /* Return a string representation of the socket address passed. The return
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
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605 * value is allocated with malloc() */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
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diff changeset
606 void getaddrstring(struct sockaddr_storage* addr,
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607 char **ret_host, char **ret_port,
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Matt Johnston <matt@ucc.asn.au>
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608 int host_lookup) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
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609
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
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diff changeset
610 char host[NI_MAXHOST+1], serv[NI_MAXSERV+1];
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Matt Johnston <matt@ucc.asn.au>
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diff changeset
611 unsigned int len;
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
612 int ret;
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parents:
diff changeset
613
0da8ba489c23 Move generic network routines to netio.c
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614 int flags = NI_NUMERICSERV | NI_NUMERICHOST;
0da8ba489c23 Move generic network routines to netio.c
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parents:
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615
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
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616 #ifndef DO_HOST_LOOKUP
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617 host_lookup = 0;
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Matt Johnston <matt@ucc.asn.au>
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618 #endif
0da8ba489c23 Move generic network routines to netio.c
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parents:
diff changeset
619
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parents:
diff changeset
620 if (host_lookup) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
621 flags = NI_NUMERICSERV;
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622 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
623
0da8ba489c23 Move generic network routines to netio.c
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parents:
diff changeset
624 len = sizeof(struct sockaddr_storage);
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
625 /* Some platforms such as Solaris 8 require that len is the length
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
626 * of the specific structure. Some older linux systems (glibc 2.1.3
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
627 * such as debian potato) have sockaddr_storage.__ss_family instead
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
628 * but we'll ignore them */
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
629 #ifdef HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY
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parents:
diff changeset
630 if (addr->ss_family == AF_INET) {
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
631 len = sizeof(struct sockaddr_in);
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
632 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
633 #ifdef AF_INET6
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
634 if (addr->ss_family == AF_INET6) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
635 len = sizeof(struct sockaddr_in6);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
636 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
637 #endif
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
638 #endif
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
639
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
640 ret = getnameinfo((struct sockaddr*)addr, len, host, sizeof(host)-1,
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
641 serv, sizeof(serv)-1, flags);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
642
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
643 if (ret != 0) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
644 if (host_lookup) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
645 /* On some systems (Darwin does it) we get EINTR from getnameinfo
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
646 * somehow. Eew. So we'll just return the IP, since that doesn't seem
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
647 * to exhibit that behaviour. */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
648 getaddrstring(addr, ret_host, ret_port, 0);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
649 return;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
650 } else {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
651 /* if we can't do a numeric lookup, something's gone terribly wrong */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
652 dropbear_exit("Failed lookup: %s", gai_strerror(ret));
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
653 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
654 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
655
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
656 if (ret_host) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
657 *ret_host = m_strdup(host);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
658 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
659 if (ret_port) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
660 *ret_port = m_strdup(serv);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
661 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
662 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
663