annotate netio.c @ 1145:5709b15a1b57

Fix segfault with restricted authorized_key files without forced command
author Guilhem Moulin <guilhem@fripost.org>
date Fri, 07 Aug 2015 23:00:08 +0800
parents a7c4a70ae495
children 57d09741d46d
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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 };
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23
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24 /* Deallocate a progress connection. Removes from the pending list if iter!=NULL.
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25 Does not close sockets */
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26 static void remove_connect(struct dropbear_progress_connection *c, m_list_elem *iter) {
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27 if (c->res) {
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28 freeaddrinfo(c->res);
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29 }
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30 m_free(c->remotehost);
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31 m_free(c->remoteport);
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32 m_free(c->errstring);
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33 m_free(c);
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34
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35 if (iter) {
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36 list_remove(iter);
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37 }
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38 }
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39
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40 static void cancel_callback(int result, int sock, void* UNUSED(data), const char* UNUSED(errstring)) {
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41 if (result == DROPBEAR_SUCCESS)
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42 {
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43 m_close(sock);
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44 }
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45 }
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46
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47 void cancel_connect(struct dropbear_progress_connection *c) {
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48 c->cb = cancel_callback;
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49 c->cb_data = NULL;
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50 }
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51
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52 static void connect_try_next(struct dropbear_progress_connection *c) {
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53 struct addrinfo *r;
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54 int res = 0;
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55 int fastopen = 0;
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56 #ifdef DROPBEAR_CLIENT_TCP_FAST_OPEN
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57 struct msghdr message;
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58 #endif
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59
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60 for (r = c->res_iter; r; r = r->ai_next)
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61 {
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62 dropbear_assert(c->sock == -1);
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63
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64 c->sock = socket(c->res_iter->ai_family, c->res_iter->ai_socktype, c->res_iter->ai_protocol);
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65 if (c->sock < 0) {
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66 continue;
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67 }
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68
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69 ses.maxfd = MAX(ses.maxfd, c->sock);
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70 set_sock_nodelay(c->sock);
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71 setnonblocking(c->sock);
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72
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73 #ifdef DROPBEAR_CLIENT_TCP_FAST_OPEN
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74 fastopen = (c->writequeue != NULL);
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75
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76 if (fastopen) {
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77 memset(&message, 0x0, sizeof(message));
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78 message.msg_name = r->ai_addr;
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79 message.msg_namelen = r->ai_addrlen;
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80 /* 6 is arbitrary, enough to hold initial packets */
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81 unsigned int iovlen = 6; /* Linux msg_iovlen is a size_t */
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82 struct iovec iov[6];
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83 packet_queue_to_iovec(c->writequeue, iov, &iovlen);
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84 message.msg_iov = iov;
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85 message.msg_iovlen = iovlen;
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86 res = sendmsg(c->sock, &message, MSG_FASTOPEN);
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87 /* Returns EINPROGRESS if FASTOPEN wasn't available */
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88 if (res < 0) {
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89 if (errno != EINPROGRESS) {
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90 m_free(c->errstring);
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91 c->errstring = m_strdup(strerror(errno));
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92 /* Not entirely sure which kind of errors are normal - 2.6.32 seems to
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93 return EPIPE for any (nonblocking?) sendmsg(). just fall back */
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94 TRACE(("sendmsg tcp_fastopen failed, falling back. %s", strerror(errno)));
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95 /* No kernel MSG_FASTOPEN support. Fall back below */
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96 fastopen = 0;
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97 /* Set to NULL to avoid trying again */
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98 c->writequeue = NULL;
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99 }
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100 } else {
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101 packet_queue_consume(c->writequeue, res);
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102 }
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103 }
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104 #endif
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105
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106 /* Normal connect(), used as fallback for TCP fastopen too */
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107 if (!fastopen) {
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108 res = connect(c->sock, r->ai_addr, r->ai_addrlen);
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109 }
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110
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111 if (res < 0 && errno != EINPROGRESS) {
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112 /* failure */
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113 m_free(c->errstring);
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114 c->errstring = m_strdup(strerror(errno));
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115 close(c->sock);
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116 c->sock = -1;
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117 continue;
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118 } else {
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119 /* new connection was successful, wait for it to complete */
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120 break;
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121 }
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122 }
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123
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124 if (r) {
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125 c->res_iter = r->ai_next;
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126 } else {
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127 c->res_iter = NULL;
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128 }
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129 }
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130
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131 /* Connect via TCP to a host. */
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132 struct dropbear_progress_connection *connect_remote(const char* remotehost, const char* remoteport,
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133 connect_callback cb, void* cb_data)
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134 {
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135 struct dropbear_progress_connection *c = NULL;
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136 int err;
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137 struct addrinfo hints;
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138
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139 c = m_malloc(sizeof(*c));
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140 c->remotehost = m_strdup(remotehost);
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141 c->remoteport = m_strdup(remoteport);
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142 c->sock = -1;
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143 c->cb = cb;
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144 c->cb_data = cb_data;
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145
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146 list_append(&ses.conn_pending, c);
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147
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148 memset(&hints, 0, sizeof(hints));
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149 hints.ai_socktype = SOCK_STREAM;
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150 hints.ai_family = AF_UNSPEC;
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151
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parents:
diff changeset
152 err = getaddrinfo(remotehost, remoteport, &hints, &c->res);
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parents:
diff changeset
153 if (err) {
0da8ba489c23 Move generic network routines to netio.c
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parents:
diff changeset
154 int len;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
155 len = 100 + strlen(gai_strerror(err));
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
156 c->errstring = (char*)m_malloc(len);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
157 snprintf(c->errstring, len, "Error resolving '%s' port '%s'. %s",
0da8ba489c23 Move generic network routines to netio.c
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parents:
diff changeset
158 remotehost, remoteport, gai_strerror(err));
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
159 TRACE(("Error resolving: %s", gai_strerror(err)))
1053
fd3712d1ff7f Better failure handling
Matt Johnston <matt@ucc.asn.au>
parents: 1050
diff changeset
160 } else {
fd3712d1ff7f Better failure handling
Matt Johnston <matt@ucc.asn.au>
parents: 1050
diff changeset
161 c->res_iter = c->res;
1032
0da8ba489c23 Move generic network routines to netio.c
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parents:
diff changeset
162 }
0da8ba489c23 Move generic network routines to netio.c
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parents:
diff changeset
163
0da8ba489c23 Move generic network routines to netio.c
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parents:
diff changeset
164 return c;
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
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parents:
diff changeset
166
1050
c2a50c9f509e Add cleanup
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parents: 1048
diff changeset
167 void remove_connect_pending() {
c2a50c9f509e Add cleanup
Matt Johnston <matt@ucc.asn.au>
parents: 1048
diff changeset
168 while (ses.conn_pending.first) {
c2a50c9f509e Add cleanup
Matt Johnston <matt@ucc.asn.au>
parents: 1048
diff changeset
169 struct dropbear_progress_connection *c = ses.conn_pending.first->item;
c2a50c9f509e Add cleanup
Matt Johnston <matt@ucc.asn.au>
parents: 1048
diff changeset
170 remove_connect(c, ses.conn_pending.first);
c2a50c9f509e Add cleanup
Matt Johnston <matt@ucc.asn.au>
parents: 1048
diff changeset
171 }
c2a50c9f509e Add cleanup
Matt Johnston <matt@ucc.asn.au>
parents: 1048
diff changeset
172 }
c2a50c9f509e Add cleanup
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parents: 1048
diff changeset
173
1032
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174
0da8ba489c23 Move generic network routines to netio.c
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parents:
diff changeset
175 void set_connect_fds(fd_set *writefd) {
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parents:
diff changeset
176 m_list_elem *iter;
0da8ba489c23 Move generic network routines to netio.c
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parents:
diff changeset
177 TRACE(("enter handle_connect_fds"))
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parents:
diff changeset
178 for (iter = ses.conn_pending.first; iter; iter = iter->next) {
0da8ba489c23 Move generic network routines to netio.c
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parents:
diff changeset
179 struct dropbear_progress_connection *c = iter->item;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
180 /* Set one going */
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
181 while (c->res_iter && c->sock < 0)
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
182 {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
183 connect_try_next(c);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
184 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
185 if (c->sock >= 0) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
186 FD_SET(c->sock, writefd);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
187 } else {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
188 m_list_elem *remove_iter;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
189 /* Final failure */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
190 if (!c->errstring) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
191 c->errstring = m_strdup("unexpected failure");
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
192 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
193 c->cb(DROPBEAR_FAILURE, -1, c->cb_data, c->errstring);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
194 /* Safely remove without invalidating iter */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
195 remove_iter = iter;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
196 iter = iter->prev;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
197 remove_connect(c, remove_iter);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
198 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
199 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
200 }
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 void handle_connect_fds(fd_set *writefd) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
203 m_list_elem *iter;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
204 TRACE(("enter handle_connect_fds"))
0da8ba489c23 Move generic network routines to netio.c
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parents:
diff changeset
205 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
206 int val;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
207 socklen_t vallen = sizeof(val);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
208 struct dropbear_progress_connection *c = iter->item;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
209
1053
fd3712d1ff7f Better failure handling
Matt Johnston <matt@ucc.asn.au>
parents: 1050
diff changeset
210 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
211 continue;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
212 }
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 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
215
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
216 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
217 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
218 /* 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
219 m_close(c->sock);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
220 c->sock = -1;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
221 } else if (val != 0) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
222 /* Connect failed */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
223 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
224 m_close(c->sock);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
225 c->sock = -1;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
226
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
227 m_free(c->errstring);
1066
cce03ea8e6eb strdup strerror
Matt Johnston <matt@ucc.asn.au>
parents: 1065
diff changeset
228 c->errstring = m_strdup(strerror(val));
1032
0da8ba489c23 Move generic network routines to netio.c
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parents:
diff changeset
229 } else {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
230 /* New connection has been established */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
231 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
232 remove_connect(c, iter);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
233 TRACE(("leave handle_connect_fds - success"))
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
234 /* Must return here - remove_connect() invalidates iter */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
235 return;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
236 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
237 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
238 TRACE(("leave handle_connect_fds - end iter"))
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
239 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
240
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
241 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
242 c->writequeue = writequeue;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
243 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
244
1072
686cd3e8e13e avoid malloc for iovec
Matt Johnston <matt@ucc.asn.au>
parents: 1067
diff changeset
245 void packet_queue_to_iovec(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
246 struct Link *l;
1034
107b013e9d9d avoid some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1033
diff changeset
247 unsigned int i;
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
248 int len;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
249 buffer *writebuf;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
250
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
251 #ifndef IOV_MAX
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
252 #define IOV_MAX UIO_MAXIOV
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
253 #endif
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
254
1072
686cd3e8e13e avoid malloc for iovec
Matt Johnston <matt@ucc.asn.au>
parents: 1067
diff changeset
255 *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
256
1073
88043f9d40bd Fix when iov queue is large
Matt Johnston <matt@ucc.asn.au>
parents: 1072
diff changeset
257 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
258 {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
259 writebuf = (buffer*)l->item;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
260 len = writebuf->len - 1 - writebuf->pos;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
261 dropbear_assert(len > 0);
1034
107b013e9d9d avoid some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1033
diff changeset
262 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
263 len, writebuf->len-1))
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
264 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
265 iov[i].iov_len = len;
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 }
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 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
270 buffer *writebuf;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
271 int len;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
272 while (written > 0) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
273 writebuf = (buffer*)examine(queue);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
274 len = writebuf->len - 1 - writebuf->pos;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
275 if (len > written) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
276 /* partial buffer write */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
277 buf_incrpos(writebuf, written);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
278 written = 0;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
279 } else {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
280 written -= len;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
281 dequeue(queue);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
282 buf_free(writebuf);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
283 }
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
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
287 void set_sock_nodelay(int sock) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
288 int val;
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 /* disable nagle */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
291 val = 1;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
292 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
293 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
294
1084
2265d7ebfdeb separate client/server fastopen options
Matt Johnston <matt@ucc.asn.au>
parents: 1078
diff changeset
295 #ifdef DROPBEAR_SERVER_TCP_FAST_OPEN
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
296 void set_listen_fast_open(int sock) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
297 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
298 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
299 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
300 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
301 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
302
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
303 #endif
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
304
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
305 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
306
1034
107b013e9d9d avoid some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1033
diff changeset
307 int rc;
107b013e9d9d avoid some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1033
diff changeset
308 #ifdef IPTOS_LOWDELAY
107b013e9d9d avoid some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1033
diff changeset
309 int iptos_val = 0;
107b013e9d9d avoid some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1033
diff changeset
310 #endif
107b013e9d9d avoid some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1033
diff changeset
311 #ifdef SO_PRIORITY
107b013e9d9d avoid some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1033
diff changeset
312 int so_prio_val = 0;
107b013e9d9d avoid some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1033
diff changeset
313 #endif
107b013e9d9d avoid some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1033
diff changeset
314
1032
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 /* 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
317 * on a client '-J' proxy pipe */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
318
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
319 /* 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
320 #ifdef IPTOS_LOWDELAY
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
321 if (prio == DROPBEAR_PRIO_LOWDELAY) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
322 iptos_val = IPTOS_LOWDELAY;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
323 } else if (prio == DROPBEAR_PRIO_BULK) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
324 iptos_val = IPTOS_THROUGHPUT;
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 #if defined(IPPROTO_IPV6) && defined(IPV6_TCLASS)
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
327 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
328 if (rc < 0 && errno != ENOTSOCK) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
329 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
330 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
331 #endif
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
332 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
333 if (rc < 0 && errno != ENOTSOCK) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
334 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
335 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
336 #endif
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 #ifdef SO_PRIORITY
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
339 if (prio == DROPBEAR_PRIO_LOWDELAY) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
340 so_prio_val = TC_PRIO_INTERACTIVE;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
341 } else if (prio == DROPBEAR_PRIO_BULK) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
342 so_prio_val = TC_PRIO_BULK;
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 /* 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
345 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
346 if (rc < 0 && errno != ENOTSOCK)
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
347 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
348 strerror(errno));
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
349 #endif
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 }
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 /* Listen on address:port.
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
354 * 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
355 * 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
356 * 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
357 * 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
358 * string.*/
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
359 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
360 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
361
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
362 struct addrinfo hints, *res = NULL, *res0 = NULL;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
363 int err;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
364 unsigned int nsock;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
365 struct linger linger;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
366 int val;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
367 int sock;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
368
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
369 TRACE(("enter dropbear_listen"))
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
370
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
371 memset(&hints, 0, sizeof(hints));
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
372 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
373 hints.ai_socktype = SOCK_STREAM;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
374
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
375 /* for calling getaddrinfo:
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
376 address == NULL and !AI_PASSIVE: local loopback
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
377 address == NULL and AI_PASSIVE: all interfaces
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
378 address != NULL: whatever the address says */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
379 if (!address) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
380 TRACE(("dropbear_listen: local loopback"))
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
381 } else {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
382 if (address[0] == '\0') {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
383 TRACE(("dropbear_listen: all interfaces"))
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
384 address = NULL;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
385 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
386 hints.ai_flags = AI_PASSIVE;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
387 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
388 err = getaddrinfo(address, port, &hints, &res0);
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 (err) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
391 if (errstring != NULL && *errstring == NULL) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
392 int len;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
393 len = 20 + strlen(gai_strerror(err));
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
394 *errstring = (char*)m_malloc(len);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
395 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
396 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
397 if (res0) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
398 freeaddrinfo(res0);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
399 res0 = NULL;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
400 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
401 TRACE(("leave dropbear_listen: failed resolving"))
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
402 return -1;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
403 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
404
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
405
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
406 nsock = 0;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
407 for (res = res0; res != NULL && nsock < sockcount;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
408 res = res->ai_next) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
409
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
410 /* Get a socket */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
411 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
412 res->ai_protocol);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
413
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
414 sock = socks[nsock]; /* For clarity */
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 if (sock < 0) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
417 err = errno;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
418 TRACE(("socket() failed"))
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
419 continue;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
420 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
421
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
422 /* Various useful socket options */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
423 val = 1;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
424 /* set to reuse, quick timeout */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
425 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
426 linger.l_onoff = 1;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
427 linger.l_linger = 5;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
428 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
429
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
430 #if defined(IPPROTO_IPV6) && defined(IPV6_V6ONLY)
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
431 if (res->ai_family == AF_INET6) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
432 int on = 1;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
433 if (setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY,
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
434 &on, sizeof(on)) == -1) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
435 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
436 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
437 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
438 #endif
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
439
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
440 set_sock_nodelay(sock);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
441
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
442 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
443 err = errno;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
444 close(sock);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
445 TRACE(("bind(%s) failed", port))
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
446 continue;
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
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
449 if (listen(sock, DROPBEAR_LISTEN_BACKLOG) < 0) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
450 err = errno;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
451 close(sock);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
452 TRACE(("listen() failed"))
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
453 continue;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
454 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
455
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
456 *maxfd = MAX(*maxfd, sock);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
457
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
458 nsock++;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
459 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
460
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
461 if (res0) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
462 freeaddrinfo(res0);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
463 res0 = 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
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
466 if (nsock == 0) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
467 if (errstring != NULL && *errstring == NULL) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
468 int len;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
469 len = 20 + strlen(strerror(err));
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
470 *errstring = (char*)m_malloc(len);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
471 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
472 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
473 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
474 return -1;
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
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
477 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
478 return nsock;
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
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
481 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
482 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
483 {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
484 struct sockaddr_storage addr;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
485 socklen_t addrlen;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
486
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
487 if (local_host || local_port) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
488 addrlen = sizeof(addr);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
489 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
490 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
491 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
492 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
493 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
494 if (remote_host || remote_port) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
495 addrlen = sizeof(addr);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
496 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
497 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
498 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
499 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
500 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
501 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
502
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
503 /* 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
504 * value is allocated with malloc() */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
505 void getaddrstring(struct sockaddr_storage* addr,
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
506 char **ret_host, char **ret_port,
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
507 int host_lookup) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
508
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
509 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
510 unsigned int len;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
511 int ret;
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 int flags = NI_NUMERICSERV | NI_NUMERICHOST;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
514
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
515 #ifndef DO_HOST_LOOKUP
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
516 host_lookup = 0;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
517 #endif
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 if (host_lookup) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
520 flags = NI_NUMERICSERV;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
521 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
522
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
523 len = sizeof(struct sockaddr_storage);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
524 /* 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
525 * 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
526 * 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
527 * but we'll ignore them */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
528 #ifdef HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
529 if (addr->ss_family == AF_INET) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
530 len = sizeof(struct sockaddr_in);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
531 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
532 #ifdef AF_INET6
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
533 if (addr->ss_family == AF_INET6) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
534 len = sizeof(struct sockaddr_in6);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
535 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
536 #endif
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
537 #endif
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 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
540 serv, sizeof(serv)-1, flags);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
541
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
542 if (ret != 0) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
543 if (host_lookup) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
544 /* 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
545 * 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
546 * to exhibit that behaviour. */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
547 getaddrstring(addr, ret_host, ret_port, 0);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
548 return;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
549 } else {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
550 /* 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
551 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
552 }
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
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
555 if (ret_host) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
556 *ret_host = m_strdup(host);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
557 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
558 if (ret_port) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
559 *ret_port = m_strdup(serv);
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