annotate netio.c @ 1856:8f28519e34b0 default tip main master

Don't include sk keys at all in KEX list
author Matt Johnston <matt@ucc.asn.au>
date Sun, 23 Jan 2022 17:29:39 +0800
parents 4983a6bc1f51
children
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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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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
146 #endif
1033
ca71904cf3ee Fixes for backwards compatibility
Matt Johnston <matt@ucc.asn.au>
parents: 1032
diff changeset
147
ca71904cf3ee Fixes for backwards compatibility
Matt Johnston <matt@ucc.asn.au>
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
Matt Johnston <matt@ucc.asn.au>
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
Matt Johnston <matt@ucc.asn.au>
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
Matt Johnston <matt@ucc.asn.au>
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
Matt Johnston <matt@ucc.asn.au>
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
1801
4983a6bc1f51 fuzz: fix crash in newtcpdirect(), don't close the channel too early
Matt Johnston <matt@ucc.asn.au>
parents: 1797
diff changeset
191 #if DROPBEAR_FUZZ
4983a6bc1f51 fuzz: fix crash in newtcpdirect(), don't close the channel too early
Matt Johnston <matt@ucc.asn.au>
parents: 1797
diff changeset
192 if (fuzz.fuzzing) {
4983a6bc1f51 fuzz: fix crash in newtcpdirect(), don't close the channel too early
Matt Johnston <matt@ucc.asn.au>
parents: 1797
diff changeset
193 c->errstring = m_strdup("fuzzing connect_remote always fails");
4983a6bc1f51 fuzz: fix crash in newtcpdirect(), don't close the channel too early
Matt Johnston <matt@ucc.asn.au>
parents: 1797
diff changeset
194 return c;
4983a6bc1f51 fuzz: fix crash in newtcpdirect(), don't close the channel too early
Matt Johnston <matt@ucc.asn.au>
parents: 1797
diff changeset
195 }
4983a6bc1f51 fuzz: fix crash in newtcpdirect(), don't close the channel too early
Matt Johnston <matt@ucc.asn.au>
parents: 1797
diff changeset
196 #endif
4983a6bc1f51 fuzz: fix crash in newtcpdirect(), don't close the channel too early
Matt Johnston <matt@ucc.asn.au>
parents: 1797
diff changeset
197
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
198 memset(&hints, 0, sizeof(hints));
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
199 hints.ai_socktype = SOCK_STREAM;
1078
b3b772646974 Should be AF_UNSPEC not PF_UNSPEC
Matt Johnston <matt@ucc.asn.au>
parents: 1076
diff changeset
200 hints.ai_family = AF_UNSPEC;
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
201
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
202 err = getaddrinfo(remotehost, remoteport, &hints, &c->res);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
203 if (err) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
204 int len;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
205 len = 100 + strlen(gai_strerror(err));
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
206 c->errstring = (char*)m_malloc(len);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
207 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
208 remotehost, remoteport, gai_strerror(err));
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
209 TRACE(("Error resolving: %s", gai_strerror(err)))
1053
fd3712d1ff7f Better failure handling
Matt Johnston <matt@ucc.asn.au>
parents: 1050
diff changeset
210 } else {
fd3712d1ff7f Better failure handling
Matt Johnston <matt@ucc.asn.au>
parents: 1050
diff changeset
211 c->res_iter = c->res;
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
212 }
1465
f7a53832501d cli_bind_address_connect
houseofkodai <karthik@houseofkodai.in>
parents: 1464
diff changeset
213
1466
f787f60f8e45 bind to port as well with -b
Matt Johnston <matt@ucc.asn.au>
parents: 1465
diff changeset
214 if (bind_address) {
f787f60f8e45 bind to port as well with -b
Matt Johnston <matt@ucc.asn.au>
parents: 1465
diff changeset
215 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
216 }
f787f60f8e45 bind to port as well with -b
Matt Johnston <matt@ucc.asn.au>
parents: 1465
diff changeset
217 if (bind_port) {
f787f60f8e45 bind to port as well with -b
Matt Johnston <matt@ucc.asn.au>
parents: 1465
diff changeset
218 c->bind_port = m_strdup(bind_port);
1465
f7a53832501d cli_bind_address_connect
houseofkodai <karthik@houseofkodai.in>
parents: 1464
diff changeset
219 }
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
220
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
221 return c;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
222 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
223
1050
c2a50c9f509e Add cleanup
Matt Johnston <matt@ucc.asn.au>
parents: 1048
diff changeset
224 void remove_connect_pending() {
c2a50c9f509e Add cleanup
Matt Johnston <matt@ucc.asn.au>
parents: 1048
diff changeset
225 while (ses.conn_pending.first) {
c2a50c9f509e Add cleanup
Matt Johnston <matt@ucc.asn.au>
parents: 1048
diff changeset
226 struct dropbear_progress_connection *c = ses.conn_pending.first->item;
c2a50c9f509e Add cleanup
Matt Johnston <matt@ucc.asn.au>
parents: 1048
diff changeset
227 remove_connect(c, ses.conn_pending.first);
c2a50c9f509e Add cleanup
Matt Johnston <matt@ucc.asn.au>
parents: 1048
diff changeset
228 }
c2a50c9f509e Add cleanup
Matt Johnston <matt@ucc.asn.au>
parents: 1048
diff changeset
229 }
c2a50c9f509e Add cleanup
Matt Johnston <matt@ucc.asn.au>
parents: 1048
diff changeset
230
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
231
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
232 void set_connect_fds(fd_set *writefd) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
233 m_list_elem *iter;
1152
57d09741d46d avoid invalidated iterator when connection fails
Matt Johnston <matt@ucc.asn.au>
parents: 1136
diff changeset
234 iter = ses.conn_pending.first;
57d09741d46d avoid invalidated iterator when connection fails
Matt Johnston <matt@ucc.asn.au>
parents: 1136
diff changeset
235 while (iter) {
57d09741d46d avoid invalidated iterator when connection fails
Matt Johnston <matt@ucc.asn.au>
parents: 1136
diff changeset
236 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
237 struct dropbear_progress_connection *c = iter->item;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
238 /* Set one going */
1152
57d09741d46d avoid invalidated iterator when connection fails
Matt Johnston <matt@ucc.asn.au>
parents: 1136
diff changeset
239 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
240 connect_try_next(c);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
241 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
242 if (c->sock >= 0) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
243 FD_SET(c->sock, writefd);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
244 } else {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
245 /* Final failure */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
246 if (!c->errstring) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
247 c->errstring = m_strdup("unexpected failure");
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 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
250 remove_connect(c, iter);
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
251 }
1152
57d09741d46d avoid invalidated iterator when connection fails
Matt Johnston <matt@ucc.asn.au>
parents: 1136
diff changeset
252 iter = next_iter;
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
253 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
254 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
255
1459
06d52bcb8094 Pointer parameter could be declared as pointing to const
Francois Perrad <francois.perrad@gadz.org>
parents: 1426
diff changeset
256 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
257 m_list_elem *iter;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
258 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
259 int val;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
260 socklen_t vallen = sizeof(val);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
261 struct dropbear_progress_connection *c = iter->item;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
262
1053
fd3712d1ff7f Better failure handling
Matt Johnston <matt@ucc.asn.au>
parents: 1050
diff changeset
263 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
264 continue;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
265 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
266
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
267 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
268
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
269 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
270 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
271 /* 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
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 } else if (val != 0) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
275 /* Connect failed */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
276 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
277 m_close(c->sock);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
278 c->sock = -1;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
279
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
280 m_free(c->errstring);
1066
cce03ea8e6eb strdup strerror
Matt Johnston <matt@ucc.asn.au>
parents: 1065
diff changeset
281 c->errstring = m_strdup(strerror(val));
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
282 } else {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
283 /* New connection has been established */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
284 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
285 remove_connect(c, iter);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
286 TRACE(("leave handle_connect_fds - success"))
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
287 /* Must return here - remove_connect() invalidates iter */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
288 return;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
289 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
290 }
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
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
293 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
294 c->writequeue = writequeue;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
295 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
296
1459
06d52bcb8094 Pointer parameter could be declared as pointing to const
Francois Perrad <francois.perrad@gadz.org>
parents: 1426
diff changeset
297 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
298 struct Link *l;
1034
107b013e9d9d avoid some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1033
diff changeset
299 unsigned int i;
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
300 int len;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
301 buffer *writebuf;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
302
1708
58f7ca8ebc82 Set IOV_MAX for IRIX
Kazuo Kuroi <kazuo@irixnet.org>
parents: 1704
diff changeset
303 #ifndef IOV_MAX
58f7ca8ebc82 Set IOV_MAX for IRIX
Kazuo Kuroi <kazuo@irixnet.org>
parents: 1704
diff changeset
304 #if defined(__CYGWIN__) && !defined(UIO_MAXIOV)
1636
35a1e8de3aec cygwin competibility fix (#64)
karel-m <1918753+karel-m@users.noreply.github.com>
parents: 1624
diff changeset
305 #define IOV_MAX 1024
1708
58f7ca8ebc82 Set IOV_MAX for IRIX
Kazuo Kuroi <kazuo@irixnet.org>
parents: 1704
diff changeset
306 #elif defined(__sgi)
58f7ca8ebc82 Set IOV_MAX for IRIX
Kazuo Kuroi <kazuo@irixnet.org>
parents: 1704
diff changeset
307 #define IOV_MAX 512
58f7ca8ebc82 Set IOV_MAX for IRIX
Kazuo Kuroi <kazuo@irixnet.org>
parents: 1704
diff changeset
308 #else
1636
35a1e8de3aec cygwin competibility fix (#64)
karel-m <1918753+karel-m@users.noreply.github.com>
parents: 1624
diff changeset
309 #define IOV_MAX UIO_MAXIOV
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
310 #endif
1708
58f7ca8ebc82 Set IOV_MAX for IRIX
Kazuo Kuroi <kazuo@irixnet.org>
parents: 1704
diff changeset
311 #endif
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
312
1072
686cd3e8e13e avoid malloc for iovec
Matt Johnston <matt@ucc.asn.au>
parents: 1067
diff changeset
313 *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
314
1073
88043f9d40bd Fix when iov queue is large
Matt Johnston <matt@ucc.asn.au>
parents: 1072
diff changeset
315 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
316 {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
317 writebuf = (buffer*)l->item;
1577
399d8eb961b5 get rid of unused packet_type in encrypted write queue
Matt Johnston <matt@ucc.asn.au>
parents: 1558
diff changeset
318 len = writebuf->len - writebuf->pos;
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
319 dropbear_assert(len > 0);
1577
399d8eb961b5 get rid of unused packet_type in encrypted write queue
Matt Johnston <matt@ucc.asn.au>
parents: 1558
diff changeset
320 TRACE2(("write_packet writev #%d len %d/%d", i,
399d8eb961b5 get rid of unused packet_type in encrypted write queue
Matt Johnston <matt@ucc.asn.au>
parents: 1558
diff changeset
321 len, writebuf->len))
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
322 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
323 iov[i].iov_len = len;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
324 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
325 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
326
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
327 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
328 buffer *writebuf;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
329 int len;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
330 while (written > 0) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
331 writebuf = (buffer*)examine(queue);
1577
399d8eb961b5 get rid of unused packet_type in encrypted write queue
Matt Johnston <matt@ucc.asn.au>
parents: 1558
diff changeset
332 len = writebuf->len - writebuf->pos;
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
333 if (len > written) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
334 /* partial buffer write */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
335 buf_incrpos(writebuf, written);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
336 written = 0;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
337 } else {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
338 written -= len;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
339 dequeue(queue);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
340 buf_free(writebuf);
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 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
343 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
344
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
345 void set_sock_nodelay(int sock) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
346 int val;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
347
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
348 /* disable nagle */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
349 val = 1;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
350 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
351 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
352
1295
750ec4ec4cbe Convert #ifdef to #if, other build changes
Matt Johnston <matt@ucc.asn.au>
parents: 1152
diff changeset
353 #if DROPBEAR_SERVER_TCP_FAST_OPEN
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
354 void set_listen_fast_open(int sock) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
355 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
356 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
357 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
358 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
359 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
360
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
361 #endif
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
362
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
363 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
364
1034
107b013e9d9d avoid some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1033
diff changeset
365 int rc;
107b013e9d9d avoid some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1033
diff changeset
366 #ifdef IPTOS_LOWDELAY
107b013e9d9d avoid some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1033
diff changeset
367 int iptos_val = 0;
107b013e9d9d avoid some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1033
diff changeset
368 #endif
1426
89f8c5960527 test for linux/pkt-sched.h rather than SO_PRIORITY
Matt Johnston <matt@ucc.asn.au>
parents: 1316
diff changeset
369 #ifdef HAVE_LINUX_PKT_SCHED_H
1034
107b013e9d9d avoid some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1033
diff changeset
370 int so_prio_val = 0;
107b013e9d9d avoid some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1033
diff changeset
371 #endif
107b013e9d9d avoid some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1033
diff changeset
372
1558
2f64cb3d3007 - #if not #ifdef for DROPBEAR_FUZZ
Matt Johnston <matt@ucc.asn.au>
parents: 1511
diff changeset
373 #if DROPBEAR_FUZZ
1383
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority()
Matt Johnston <matt@ucc.asn.au>
parents: 1357
diff changeset
374 if (fuzz.fuzzing) {
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority()
Matt Johnston <matt@ucc.asn.au>
parents: 1357
diff changeset
375 TRACE(("fuzzing skips set_sock_prio"))
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority()
Matt Johnston <matt@ucc.asn.au>
parents: 1357
diff changeset
376 return;
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority()
Matt Johnston <matt@ucc.asn.au>
parents: 1357
diff changeset
377 }
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority()
Matt Johnston <matt@ucc.asn.au>
parents: 1357
diff changeset
378 #endif
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
379
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
380 /* 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
381 * on a client '-J' proxy pipe */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
382
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
383 /* 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
384 #ifdef IPTOS_LOWDELAY
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
385 if (prio == DROPBEAR_PRIO_LOWDELAY) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
386 iptos_val = IPTOS_LOWDELAY;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
387 } else if (prio == DROPBEAR_PRIO_BULK) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
388 iptos_val = IPTOS_THROUGHPUT;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
389 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
390 #if defined(IPPROTO_IPV6) && defined(IPV6_TCLASS)
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
391 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
392 if (rc < 0 && errno != ENOTSOCK) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
393 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
394 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
395 #endif
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
396 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
397 if (rc < 0 && errno != ENOTSOCK) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
398 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
399 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
400 #endif
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
401
1426
89f8c5960527 test for linux/pkt-sched.h rather than SO_PRIORITY
Matt Johnston <matt@ucc.asn.au>
parents: 1316
diff changeset
402 #ifdef HAVE_LINUX_PKT_SCHED_H
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
403 if (prio == DROPBEAR_PRIO_LOWDELAY) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
404 so_prio_val = TC_PRIO_INTERACTIVE;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
405 } else if (prio == DROPBEAR_PRIO_BULK) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
406 so_prio_val = TC_PRIO_BULK;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
407 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
408 /* 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
409 rc = setsockopt(sock, SOL_SOCKET, SO_PRIORITY, (void*) &so_prio_val, sizeof(so_prio_val));
1704
d384bc2e5af3 Don't warn when SO_PRIORITY fails
Matt Johnston <matt@ucc.asn.au>
parents: 1636
diff changeset
410 if (rc < 0 && errno != ENOTSOCK) {
d384bc2e5af3 Don't warn when SO_PRIORITY fails
Matt Johnston <matt@ucc.asn.au>
parents: 1636
diff changeset
411 TRACE(("Couldn't set SO_PRIORITY (%s)", strerror(errno)))
d384bc2e5af3 Don't warn when SO_PRIORITY fails
Matt Johnston <matt@ucc.asn.au>
parents: 1636
diff changeset
412 }
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
413 #endif
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
414
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
415 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
416
1464
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
417 /* from openssh/canohost.c avoid premature-optimization */
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
418 int get_sock_port(int sock) {
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
419 struct sockaddr_storage from;
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
420 socklen_t fromlen;
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
421 char strport[NI_MAXSERV];
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
422 int r;
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 /* Get IP address of client. */
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
425 fromlen = sizeof(from);
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
426 memset(&from, 0, sizeof(from));
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
427 if (getsockname(sock, (struct sockaddr *)&from, &fromlen) < 0) {
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
428 TRACE(("getsockname failed: %d", errno))
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
429 return 0;
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
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
432 /* Work around Linux IPv6 weirdness */
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
433 if (from.ss_family == AF_INET6)
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
434 fromlen = sizeof(struct sockaddr_in6);
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
435
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
436 /* Non-inet sockets don't have a port number. */
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
437 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
438 return 0;
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
439
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
440 /* Return port number. */
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
441 if ((r = getnameinfo((struct sockaddr *)&from, fromlen, NULL, 0,
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
442 strport, sizeof(strport), NI_NUMERICSERV)) != 0) {
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
443 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
444 }
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
445 return atoi(strport);
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
446 }
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
447
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
448 /* Listen on address:port.
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
449 * 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
450 * 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
451 * 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
452 * 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
453 * string.*/
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
454 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
455 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
456
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
457 struct addrinfo hints, *res = NULL, *res0 = NULL;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
458 int err;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
459 unsigned int nsock;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
460 struct linger linger;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
461 int val;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
462 int sock;
1797
f680a19bd559 Small cleanups of netio allocated port
Matt Johnston <matt@ucc.asn.au>
parents: 1796
diff changeset
463 uint16_t *allocated_lport_p = NULL;
1796
74f4a5987234 Update netio.c (#115)
Guillaume Picquet <guillaume.picquet@gls-france.com>
parents: 1786
diff changeset
464 int allocated_lport = 0;
74f4a5987234 Update netio.c (#115)
Guillaume Picquet <guillaume.picquet@gls-france.com>
parents: 1786
diff changeset
465
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
466 TRACE(("enter dropbear_listen"))
1786
a3b39df57c8b fuzz: add an always-failing dropbear_listen() replacement
Matt Johnston <matt@ucc.asn.au>
parents: 1777
diff changeset
467
a3b39df57c8b fuzz: add an always-failing dropbear_listen() replacement
Matt Johnston <matt@ucc.asn.au>
parents: 1777
diff changeset
468 #if DROPBEAR_FUZZ
a3b39df57c8b fuzz: add an always-failing dropbear_listen() replacement
Matt Johnston <matt@ucc.asn.au>
parents: 1777
diff changeset
469 if (fuzz.fuzzing) {
a3b39df57c8b fuzz: add an always-failing dropbear_listen() replacement
Matt Johnston <matt@ucc.asn.au>
parents: 1777
diff changeset
470 return fuzz_dropbear_listen(address, port, socks, sockcount, errstring, maxfd);
a3b39df57c8b fuzz: add an always-failing dropbear_listen() replacement
Matt Johnston <matt@ucc.asn.au>
parents: 1777
diff changeset
471 }
a3b39df57c8b fuzz: add an always-failing dropbear_listen() replacement
Matt Johnston <matt@ucc.asn.au>
parents: 1777
diff changeset
472 #endif
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
473
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
474 memset(&hints, 0, sizeof(hints));
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
475 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
476 hints.ai_socktype = SOCK_STREAM;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
477
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
478 /* for calling getaddrinfo:
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
479 address == NULL and !AI_PASSIVE: local loopback
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
480 address == NULL and AI_PASSIVE: all interfaces
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
481 address != NULL: whatever the address says */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
482 if (!address) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
483 TRACE(("dropbear_listen: local loopback"))
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
484 } else {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
485 if (address[0] == '\0') {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
486 TRACE(("dropbear_listen: all interfaces"))
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
487 address = NULL;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
488 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
489 hints.ai_flags = AI_PASSIVE;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
490 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
491 err = getaddrinfo(address, port, &hints, &res0);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
492
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
493 if (err) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
494 if (errstring != NULL && *errstring == NULL) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
495 int len;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
496 len = 20 + strlen(gai_strerror(err));
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
497 *errstring = (char*)m_malloc(len);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
498 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
499 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
500 if (res0) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
501 freeaddrinfo(res0);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
502 res0 = NULL;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
503 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
504 TRACE(("leave dropbear_listen: failed resolving"))
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
505 return -1;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
506 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
507
1797
f680a19bd559 Small cleanups of netio allocated port
Matt Johnston <matt@ucc.asn.au>
parents: 1796
diff changeset
508 /* When listening on server-assigned-port 0
1464
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
509 * the assigned ports may differ for address families (v4/v6)
1797
f680a19bd559 Small cleanups of netio allocated port
Matt Johnston <matt@ucc.asn.au>
parents: 1796
diff changeset
510 * causing problems for tcpip-forward.
f680a19bd559 Small cleanups of netio allocated port
Matt Johnston <matt@ucc.asn.au>
parents: 1796
diff changeset
511 * Caller can do a get_socket_address to discover assigned-port
f680a19bd559 Small cleanups of netio allocated port
Matt Johnston <matt@ucc.asn.au>
parents: 1796
diff changeset
512 * hence, use same port for all address families */
f680a19bd559 Small cleanups of netio allocated port
Matt Johnston <matt@ucc.asn.au>
parents: 1796
diff changeset
513 allocated_lport = 0;
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
514 nsock = 0;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
515 for (res = res0; res != NULL && nsock < sockcount;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
516 res = res->ai_next) {
1464
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
517 if (allocated_lport > 0) {
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
518 if (AF_INET == res->ai_family) {
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
519 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
520 } else if (AF_INET6 == res->ai_family) {
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
521 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
522 }
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
523 *allocated_lport_p = htons(allocated_lport);
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
524 }
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
525
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
526 /* Get a socket */
1797
f680a19bd559 Small cleanups of netio allocated port
Matt Johnston <matt@ucc.asn.au>
parents: 1796
diff changeset
527 socks[nsock] = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
528 sock = socks[nsock]; /* For clarity */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
529 if (sock < 0) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
530 err = errno;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
531 TRACE(("socket() failed"))
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
532 continue;
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 /* Various useful socket options */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
536 val = 1;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
537 /* set to reuse, quick timeout */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
538 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
539 linger.l_onoff = 1;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
540 linger.l_linger = 5;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
541 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
542
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
543 #if defined(IPPROTO_IPV6) && defined(IPV6_V6ONLY)
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
544 if (res->ai_family == AF_INET6) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
545 int on = 1;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
546 if (setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY,
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
547 &on, sizeof(on)) == -1) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
548 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
549 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
550 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
551 #endif
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
552 set_sock_nodelay(sock);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
553
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
554 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
555 err = errno;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
556 close(sock);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
557 TRACE(("bind(%s) failed", port))
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
558 continue;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
559 }
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 if (listen(sock, DROPBEAR_LISTEN_BACKLOG) < 0) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
562 err = errno;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
563 close(sock);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
564 TRACE(("listen() failed"))
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
565 continue;
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
1464
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
568 if (0 == allocated_lport) {
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
569 allocated_lport = get_sock_port(sock);
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
570 }
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1459
diff changeset
571
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
572 *maxfd = MAX(*maxfd, sock);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
573 nsock++;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
574 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
575
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
576 if (res0) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
577 freeaddrinfo(res0);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
578 res0 = NULL;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
579 }
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 if (nsock == 0) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
582 if (errstring != NULL && *errstring == NULL) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
583 int len;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
584 len = 20 + strlen(strerror(err));
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
585 *errstring = (char*)m_malloc(len);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
586 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
587 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
588 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
589 return -1;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
590 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
591
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
592 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
593 return nsock;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
594 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
595
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
596 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
597 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
598 {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
599 struct sockaddr_storage addr;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
600 socklen_t addrlen;
1383
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority()
Matt Johnston <matt@ucc.asn.au>
parents: 1357
diff changeset
601
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority()
Matt Johnston <matt@ucc.asn.au>
parents: 1357
diff changeset
602 #if DROPBEAR_FUZZ
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority()
Matt Johnston <matt@ucc.asn.au>
parents: 1357
diff changeset
603 if (fuzz.fuzzing) {
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority()
Matt Johnston <matt@ucc.asn.au>
parents: 1357
diff changeset
604 fuzz_get_socket_address(fd, local_host, local_port, remote_host, remote_port, host_lookup);
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority()
Matt Johnston <matt@ucc.asn.au>
parents: 1357
diff changeset
605 return;
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority()
Matt Johnston <matt@ucc.asn.au>
parents: 1357
diff changeset
606 }
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority()
Matt Johnston <matt@ucc.asn.au>
parents: 1357
diff changeset
607 #endif
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
608
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
609 if (local_host || local_port) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
610 addrlen = sizeof(addr);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
611 if (getsockname(fd, (struct sockaddr*)&addr, &addrlen) < 0) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
612 dropbear_exit("Failed socket address: %s", strerror(errno));
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
613 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
614 getaddrstring(&addr, local_host, local_port, host_lookup);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
615 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
616 if (remote_host || remote_port) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
617 addrlen = sizeof(addr);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
618 if (getpeername(fd, (struct sockaddr*)&addr, &addrlen) < 0) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
619 dropbear_exit("Failed socket address: %s", strerror(errno));
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
620 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
621 getaddrstring(&addr, remote_host, remote_port, host_lookup);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
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
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
624
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
625 /* 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>
parents:
diff changeset
626 * value is allocated with malloc() */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
627 void getaddrstring(struct sockaddr_storage* addr,
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
628 char **ret_host, char **ret_port,
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
629 int host_lookup) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
630
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
631 char host[NI_MAXHOST+1], serv[NI_MAXSERV+1];
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
632 unsigned int len;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
633 int ret;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
634
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
635 int flags = NI_NUMERICSERV | NI_NUMERICHOST;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
636
1499
2d450c1056e3 options: Complete the transition to numeric toggles (`#if')
Michael Witten <mfwitten@gmail.com>
parents: 1466
diff changeset
637 #if !DO_HOST_LOOKUP
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
638 host_lookup = 0;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
639 #endif
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
640
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
641 if (host_lookup) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
642 flags = NI_NUMERICSERV;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
643 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
644
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
645 len = sizeof(struct sockaddr_storage);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
646 /* 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
647 * 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
648 * 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
649 * but we'll ignore them */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
650 #ifdef HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
651 if (addr->ss_family == AF_INET) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
652 len = sizeof(struct sockaddr_in);
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 #ifdef AF_INET6
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
655 if (addr->ss_family == AF_INET6) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
656 len = sizeof(struct sockaddr_in6);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
657 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
658 #endif
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
659 #endif
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
660
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
661 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
662 serv, sizeof(serv)-1, flags);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
663
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
664 if (ret != 0) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
665 if (host_lookup) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
666 /* 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
667 * 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
668 * to exhibit that behaviour. */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
669 getaddrstring(addr, ret_host, ret_port, 0);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
670 return;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
671 } else {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
672 /* 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
673 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
674 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
675 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
676
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
677 if (ret_host) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
678 *ret_host = m_strdup(host);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
679 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
680 if (ret_port) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
681 *ret_port = m_strdup(serv);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
682 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
683 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
684