annotate netio.c @ 1072:686cd3e8e13e

avoid malloc for iovec
author Matt Johnston <matt@ucc.asn.au>
date Fri, 20 Mar 2015 22:53:32 +0800
parents ce21d0bfaf98
children 88043f9d40bd
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1 #include "netio.h"
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
2 #include "list.h"
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
3 #include "dbutil.h"
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
4 #include "session.h"
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
5 #include "debug.h"
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
6
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
7 struct dropbear_progress_connection {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
8 struct addrinfo *res;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
9 struct addrinfo *res_iter;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
10
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
11 char *remotehost, *remoteport; /* For error reporting */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
12
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
13 connect_callback cb;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
14 void *cb_data;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
15
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
16 struct Queue *writequeue; /* A queue of encrypted packets to send with TCP fastopen,
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
17 or NULL. */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
18
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
19 int sock;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
20
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
21 char* errstring;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
22 };
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
23
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
24 #if defined(__linux__) && defined(TCP_DEFER_ACCEPT)
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
25 static void set_piggyback_ack(int sock) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
26 /* Undocumented Linux feature - set TCP_DEFER_ACCEPT and data will be piggybacked
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
27 on the 3rd packet (ack) of the TCP handshake. Saves a IP packet.
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
28 http://thread.gmane.org/gmane.linux.network/224627/focus=224727
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
29 "Piggyback the final ACK of the three way TCP connection establishment with the data" */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
30 int val = 1;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
31 /* No error checking, this is opportunistic */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
32 int err = setsockopt(sock, IPPROTO_TCP, TCP_DEFER_ACCEPT, (void*)&val, sizeof(val));
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
33 if (err)
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
34 {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
35 TRACE(("Failed setsockopt TCP_DEFER_ACCEPT: %s", strerror(errno)))
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
36 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
37 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
38 #endif
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
39
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
40
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
41 /* Deallocate a progress connection. Removes from the pending list if iter!=NULL.
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
42 Does not close sockets */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
43 static void remove_connect(struct dropbear_progress_connection *c, m_list_elem *iter) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
44 if (c->res) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
45 freeaddrinfo(c->res);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
46 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
47 m_free(c->remotehost);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
48 m_free(c->remoteport);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
49 m_free(c->errstring);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
50 m_free(c);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
51
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
52 if (iter) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
53 list_remove(iter);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
54 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
55 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
56
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
57 static void cancel_callback(int result, int sock, void* UNUSED(data), const char* UNUSED(errstring)) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
58 if (result == DROPBEAR_SUCCESS)
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
59 {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
60 m_close(sock);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
61 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
62 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
63
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
64 void cancel_connect(struct dropbear_progress_connection *c) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
65 c->cb = cancel_callback;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
66 c->cb_data = NULL;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
67 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
68
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
69 static void connect_try_next(struct dropbear_progress_connection *c) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
70 struct addrinfo *r;
1033
ca71904cf3ee Fixes for backwards compatibility
Matt Johnston <matt@ucc.asn.au>
parents: 1032
diff changeset
71 int res = 0;
ca71904cf3ee Fixes for backwards compatibility
Matt Johnston <matt@ucc.asn.au>
parents: 1032
diff changeset
72 int fastopen = 0;
ca71904cf3ee Fixes for backwards compatibility
Matt Johnston <matt@ucc.asn.au>
parents: 1032
diff changeset
73 #ifdef DROPBEAR_TCP_FAST_OPEN
1035
8ed1d37e75a6 get rid of some unnecessary code
Matt Johnston <matt@ucc.asn.au>
parents: 1034
diff changeset
74 struct msghdr message;
1072
686cd3e8e13e avoid malloc for iovec
Matt Johnston <matt@ucc.asn.au>
parents: 1067
diff changeset
75 struct iovec message;
1033
ca71904cf3ee Fixes for backwards compatibility
Matt Johnston <matt@ucc.asn.au>
parents: 1032
diff changeset
76 #endif
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
77
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
78 for (r = c->res_iter; r; r = r->ai_next)
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
79 {
1067
ce21d0bfaf98 dropbear_assert() rather than assert()
Matt Johnston <matt@ucc.asn.au>
parents: 1066
diff changeset
80 dropbear_assert(c->sock == -1);
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
81
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
82 c->sock = socket(c->res_iter->ai_family, c->res_iter->ai_socktype, c->res_iter->ai_protocol);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
83 if (c->sock < 0) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
84 continue;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
85 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
86
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
87 ses.maxfd = MAX(ses.maxfd, c->sock);
1035
8ed1d37e75a6 get rid of some unnecessary code
Matt Johnston <matt@ucc.asn.au>
parents: 1034
diff changeset
88 set_sock_nodelay(c->sock);
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
89 setnonblocking(c->sock);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
90
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
91 #if defined(__linux__) && defined(TCP_DEFER_ACCEPT)
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
92 set_piggyback_ack(c->sock);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
93 #endif
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
94
1033
ca71904cf3ee Fixes for backwards compatibility
Matt Johnston <matt@ucc.asn.au>
parents: 1032
diff changeset
95 #ifdef DROPBEAR_TCP_FAST_OPEN
ca71904cf3ee Fixes for backwards compatibility
Matt Johnston <matt@ucc.asn.au>
parents: 1032
diff changeset
96 fastopen = (c->writequeue != NULL);
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
97
1033
ca71904cf3ee Fixes for backwards compatibility
Matt Johnston <matt@ucc.asn.au>
parents: 1032
diff changeset
98 memset(&message, 0x0, sizeof(message));
ca71904cf3ee Fixes for backwards compatibility
Matt Johnston <matt@ucc.asn.au>
parents: 1032
diff changeset
99 message.msg_name = r->ai_addr;
ca71904cf3ee Fixes for backwards compatibility
Matt Johnston <matt@ucc.asn.au>
parents: 1032
diff changeset
100 message.msg_namelen = r->ai_addrlen;
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
101
1033
ca71904cf3ee Fixes for backwards compatibility
Matt Johnston <matt@ucc.asn.au>
parents: 1032
diff changeset
102 if (c->writequeue) {
1072
686cd3e8e13e avoid malloc for iovec
Matt Johnston <matt@ucc.asn.au>
parents: 1067
diff changeset
103 /* 6 is arbitrary, enough to hold initial packets */
686cd3e8e13e avoid malloc for iovec
Matt Johnston <matt@ucc.asn.au>
parents: 1067
diff changeset
104 int iovlen = 6; /* Linux msg_iovlen is a size_t */
686cd3e8e13e avoid malloc for iovec
Matt Johnston <matt@ucc.asn.au>
parents: 1067
diff changeset
105 struct iov[6];
686cd3e8e13e avoid malloc for iovec
Matt Johnston <matt@ucc.asn.au>
parents: 1067
diff changeset
106 packet_queue_to_iovec(c->writequeue, iov, &iovlen);
686cd3e8e13e avoid malloc for iovec
Matt Johnston <matt@ucc.asn.au>
parents: 1067
diff changeset
107 message.msg_iov = &iov;
1033
ca71904cf3ee Fixes for backwards compatibility
Matt Johnston <matt@ucc.asn.au>
parents: 1032
diff changeset
108 message.msg_iovlen = iovlen;
ca71904cf3ee Fixes for backwards compatibility
Matt Johnston <matt@ucc.asn.au>
parents: 1032
diff changeset
109 res = sendmsg(c->sock, &message, MSG_FASTOPEN);
1048
9cec9ed503bb EINPROGRESS for sendmsg() means it's working OK
Matt Johnston <matt@ucc.asn.au>
parents: 1047
diff changeset
110 if (res < 0 && errno != EINPROGRESS) {
1065
23103e1e9548 Fix error handling for dbclient async connect
Matt Johnston <matt@ucc.asn.au>
parents: 1053
diff changeset
111 m_free(c->errstring);
23103e1e9548 Fix error handling for dbclient async connect
Matt Johnston <matt@ucc.asn.au>
parents: 1053
diff changeset
112 c->errstring = m_strdup(strerror(errno));
1047
e6c4cd0510d9 ignore any sendmsg() errors
Matt Johnston <matt@ucc.asn.au>
parents: 1035
diff changeset
113 /* Not entirely sure which kind of errors are normal - 2.6.32 seems to
e6c4cd0510d9 ignore any sendmsg() errors
Matt Johnston <matt@ucc.asn.au>
parents: 1035
diff changeset
114 return EPIPE for any (nonblocking?) sendmsg(). just fall back */
e6c4cd0510d9 ignore any sendmsg() errors
Matt Johnston <matt@ucc.asn.au>
parents: 1035
diff changeset
115 TRACE(("sendmsg tcp_fastopen failed, falling back. %s", strerror(errno)));
1033
ca71904cf3ee Fixes for backwards compatibility
Matt Johnston <matt@ucc.asn.au>
parents: 1032
diff changeset
116 /* No kernel MSG_FASTOPEN support. Fall back below */
ca71904cf3ee Fixes for backwards compatibility
Matt Johnston <matt@ucc.asn.au>
parents: 1032
diff changeset
117 fastopen = 0;
ca71904cf3ee Fixes for backwards compatibility
Matt Johnston <matt@ucc.asn.au>
parents: 1032
diff changeset
118 /* Set to NULL to avoid trying again */
ca71904cf3ee Fixes for backwards compatibility
Matt Johnston <matt@ucc.asn.au>
parents: 1032
diff changeset
119 c->writequeue = NULL;
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
120 }
1035
8ed1d37e75a6 get rid of some unnecessary code
Matt Johnston <matt@ucc.asn.au>
parents: 1034
diff changeset
121 packet_queue_consume(c->writequeue, res);
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
122 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
123 #endif
1033
ca71904cf3ee Fixes for backwards compatibility
Matt Johnston <matt@ucc.asn.au>
parents: 1032
diff changeset
124
ca71904cf3ee Fixes for backwards compatibility
Matt Johnston <matt@ucc.asn.au>
parents: 1032
diff changeset
125 /* Normal connect(), used as fallback for TCP fastopen too */
ca71904cf3ee Fixes for backwards compatibility
Matt Johnston <matt@ucc.asn.au>
parents: 1032
diff changeset
126 if (!fastopen) {
ca71904cf3ee Fixes for backwards compatibility
Matt Johnston <matt@ucc.asn.au>
parents: 1032
diff changeset
127 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
128 }
ca71904cf3ee Fixes for backwards compatibility
Matt Johnston <matt@ucc.asn.au>
parents: 1032
diff changeset
129
ca71904cf3ee Fixes for backwards compatibility
Matt Johnston <matt@ucc.asn.au>
parents: 1032
diff changeset
130 if (res < 0 && errno != EINPROGRESS) {
1035
8ed1d37e75a6 get rid of some unnecessary code
Matt Johnston <matt@ucc.asn.au>
parents: 1034
diff changeset
131 /* failure */
1065
23103e1e9548 Fix error handling for dbclient async connect
Matt Johnston <matt@ucc.asn.au>
parents: 1053
diff changeset
132 m_free(c->errstring);
23103e1e9548 Fix error handling for dbclient async connect
Matt Johnston <matt@ucc.asn.au>
parents: 1053
diff changeset
133 c->errstring = m_strdup(strerror(errno));
1033
ca71904cf3ee Fixes for backwards compatibility
Matt Johnston <matt@ucc.asn.au>
parents: 1032
diff changeset
134 close(c->sock);
ca71904cf3ee Fixes for backwards compatibility
Matt Johnston <matt@ucc.asn.au>
parents: 1032
diff changeset
135 c->sock = -1;
ca71904cf3ee Fixes for backwards compatibility
Matt Johnston <matt@ucc.asn.au>
parents: 1032
diff changeset
136 continue;
ca71904cf3ee Fixes for backwards compatibility
Matt Johnston <matt@ucc.asn.au>
parents: 1032
diff changeset
137 } else {
1035
8ed1d37e75a6 get rid of some unnecessary code
Matt Johnston <matt@ucc.asn.au>
parents: 1034
diff changeset
138 /* 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
139 break;
ca71904cf3ee Fixes for backwards compatibility
Matt Johnston <matt@ucc.asn.au>
parents: 1032
diff changeset
140 }
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
141 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
142
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
143 if (r) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
144 c->res_iter = r->ai_next;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
145 } else {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
146 c->res_iter = NULL;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
147 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
148 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
149
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
150 /* Connect via TCP to a host. */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
151 struct dropbear_progress_connection *connect_remote(const char* remotehost, const char* remoteport,
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
152 connect_callback cb, void* cb_data)
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
153 {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
154 struct dropbear_progress_connection *c = NULL;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
155 int err;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
156 struct addrinfo hints;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
157
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
158 c = m_malloc(sizeof(*c));
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
159 c->remotehost = m_strdup(remotehost);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
160 c->remoteport = m_strdup(remoteport);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
161 c->sock = -1;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
162 c->cb = cb;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
163 c->cb_data = cb_data;
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 list_append(&ses.conn_pending, c);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
166
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
167 memset(&hints, 0, sizeof(hints));
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
168 hints.ai_socktype = SOCK_STREAM;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
169 hints.ai_family = PF_UNSPEC;
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 err = getaddrinfo(remotehost, remoteport, &hints, &c->res);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
172 if (err) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
173 int len;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
174 len = 100 + strlen(gai_strerror(err));
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
175 c->errstring = (char*)m_malloc(len);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
176 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
177 remotehost, remoteport, gai_strerror(err));
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
178 TRACE(("Error resolving: %s", gai_strerror(err)))
1053
fd3712d1ff7f Better failure handling
Matt Johnston <matt@ucc.asn.au>
parents: 1050
diff changeset
179 } else {
fd3712d1ff7f Better failure handling
Matt Johnston <matt@ucc.asn.au>
parents: 1050
diff changeset
180 c->res_iter = c->res;
1032
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
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
183 return 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
1050
c2a50c9f509e Add cleanup
Matt Johnston <matt@ucc.asn.au>
parents: 1048
diff changeset
186 void remove_connect_pending() {
c2a50c9f509e Add cleanup
Matt Johnston <matt@ucc.asn.au>
parents: 1048
diff changeset
187 while (ses.conn_pending.first) {
c2a50c9f509e Add cleanup
Matt Johnston <matt@ucc.asn.au>
parents: 1048
diff changeset
188 struct dropbear_progress_connection *c = ses.conn_pending.first->item;
c2a50c9f509e Add cleanup
Matt Johnston <matt@ucc.asn.au>
parents: 1048
diff changeset
189 remove_connect(c, ses.conn_pending.first);
c2a50c9f509e Add cleanup
Matt Johnston <matt@ucc.asn.au>
parents: 1048
diff changeset
190 }
c2a50c9f509e Add cleanup
Matt Johnston <matt@ucc.asn.au>
parents: 1048
diff changeset
191 }
c2a50c9f509e Add cleanup
Matt Johnston <matt@ucc.asn.au>
parents: 1048
diff changeset
192
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
193
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
194 void set_connect_fds(fd_set *writefd) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
195 m_list_elem *iter;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
196 TRACE(("enter handle_connect_fds"))
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
197 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
198 struct dropbear_progress_connection *c = iter->item;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
199 /* Set one going */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
200 while (c->res_iter && c->sock < 0)
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 connect_try_next(c);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
203 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
204 if (c->sock >= 0) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
205 FD_SET(c->sock, writefd);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
206 } else {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
207 m_list_elem *remove_iter;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
208 /* Final failure */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
209 if (!c->errstring) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
210 c->errstring = m_strdup("unexpected failure");
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
211 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
212 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
213 /* Safely remove without invalidating iter */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
214 remove_iter = iter;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
215 iter = iter->prev;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
216 remove_connect(c, remove_iter);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
217 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
218 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
219 }
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 void handle_connect_fds(fd_set *writefd) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
222 m_list_elem *iter;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
223 TRACE(("enter handle_connect_fds"))
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
224 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
225 int val;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
226 socklen_t vallen = sizeof(val);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
227 struct dropbear_progress_connection *c = iter->item;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
228
1053
fd3712d1ff7f Better failure handling
Matt Johnston <matt@ucc.asn.au>
parents: 1050
diff changeset
229 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
230 continue;
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
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
233 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
234
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
235 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
236 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
237 /* 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
238 m_close(c->sock);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
239 c->sock = -1;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
240 } else if (val != 0) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
241 /* Connect failed */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
242 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
243 m_close(c->sock);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
244 c->sock = -1;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
245
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
246 m_free(c->errstring);
1066
cce03ea8e6eb strdup strerror
Matt Johnston <matt@ucc.asn.au>
parents: 1065
diff changeset
247 c->errstring = m_strdup(strerror(val));
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
248 } else {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
249 /* New connection has been established */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
250 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
251 remove_connect(c, iter);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
252 TRACE(("leave handle_connect_fds - success"))
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
253 /* Must return here - remove_connect() invalidates iter */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
254 return;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
255 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
256 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
257 TRACE(("leave handle_connect_fds - end iter"))
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
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
260 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
261 c->writequeue = writequeue;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
262 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
263
1072
686cd3e8e13e avoid malloc for iovec
Matt Johnston <matt@ucc.asn.au>
parents: 1067
diff changeset
264 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
265 struct Link *l;
1034
107b013e9d9d avoid some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1033
diff changeset
266 unsigned int i;
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
267 int len;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
268 buffer *writebuf;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
269
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
270 #ifndef IOV_MAX
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
271 #define IOV_MAX UIO_MAXIOV
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
272 #endif
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
273
1072
686cd3e8e13e avoid malloc for iovec
Matt Johnston <matt@ucc.asn.au>
parents: 1067
diff changeset
274 *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
275
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
276 for (l = queue->head, i = 0; l; l = l->link, i++)
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
277 {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
278 writebuf = (buffer*)l->item;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
279 len = writebuf->len - 1 - writebuf->pos;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
280 dropbear_assert(len > 0);
1034
107b013e9d9d avoid some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1033
diff changeset
281 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
282 len, writebuf->len-1))
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
283 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
284 iov[i].iov_len = len;
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
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
288 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
289 buffer *writebuf;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
290 int len;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
291 while (written > 0) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
292 writebuf = (buffer*)examine(queue);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
293 len = writebuf->len - 1 - writebuf->pos;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
294 if (len > written) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
295 /* partial buffer write */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
296 buf_incrpos(writebuf, written);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
297 written = 0;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
298 } else {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
299 written -= len;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
300 dequeue(queue);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
301 buf_free(writebuf);
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 }
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
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
306 void set_sock_nodelay(int sock) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
307 int val;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
308
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
309 /* disable nagle */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
310 val = 1;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
311 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
312 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
313
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
314 #ifdef DROPBEAR_TCP_FAST_OPEN
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
315 void set_listen_fast_open(int sock) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
316 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
317 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
318 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
319 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
320 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
321
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
322 #endif
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
323
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
324 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
325
1034
107b013e9d9d avoid some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1033
diff changeset
326 int rc;
107b013e9d9d avoid some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1033
diff changeset
327 #ifdef IPTOS_LOWDELAY
107b013e9d9d avoid some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1033
diff changeset
328 int iptos_val = 0;
107b013e9d9d avoid some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1033
diff changeset
329 #endif
107b013e9d9d avoid some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1033
diff changeset
330 #ifdef SO_PRIORITY
107b013e9d9d avoid some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1033
diff changeset
331 int so_prio_val = 0;
107b013e9d9d avoid some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1033
diff changeset
332 #endif
107b013e9d9d avoid some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1033
diff changeset
333
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
334
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
335 /* 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
336 * on a client '-J' proxy pipe */
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 /* 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
339 #ifdef IPTOS_LOWDELAY
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
340 if (prio == DROPBEAR_PRIO_LOWDELAY) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
341 iptos_val = IPTOS_LOWDELAY;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
342 } else if (prio == DROPBEAR_PRIO_BULK) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
343 iptos_val = IPTOS_THROUGHPUT;
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 #if defined(IPPROTO_IPV6) && defined(IPV6_TCLASS)
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
346 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
347 if (rc < 0 && errno != ENOTSOCK) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
348 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
349 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
350 #endif
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
351 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
352 if (rc < 0 && errno != ENOTSOCK) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
353 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
354 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
355 #endif
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
356
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
357 #ifdef SO_PRIORITY
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
358 if (prio == DROPBEAR_PRIO_LOWDELAY) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
359 so_prio_val = TC_PRIO_INTERACTIVE;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
360 } else if (prio == DROPBEAR_PRIO_BULK) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
361 so_prio_val = TC_PRIO_BULK;
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 /* 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
364 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
365 if (rc < 0 && errno != ENOTSOCK)
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
366 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
367 strerror(errno));
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
368 #endif
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
369
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
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
372 /* Listen on address:port.
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
373 * 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
374 * 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
375 * 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
376 * 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
377 * string.*/
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
378 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
379 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
380
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
381 struct addrinfo hints, *res = NULL, *res0 = NULL;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
382 int err;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
383 unsigned int nsock;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
384 struct linger linger;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
385 int val;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
386 int sock;
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 TRACE(("enter dropbear_listen"))
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 memset(&hints, 0, sizeof(hints));
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
391 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
392 hints.ai_socktype = SOCK_STREAM;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
393
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
394 /* for calling getaddrinfo:
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
395 address == NULL and !AI_PASSIVE: local loopback
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
396 address == NULL and AI_PASSIVE: all interfaces
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
397 address != NULL: whatever the address says */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
398 if (!address) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
399 TRACE(("dropbear_listen: local loopback"))
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
400 } else {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
401 if (address[0] == '\0') {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
402 TRACE(("dropbear_listen: all interfaces"))
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
403 address = NULL;
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 hints.ai_flags = AI_PASSIVE;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
406 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
407 err = getaddrinfo(address, port, &hints, &res0);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
408
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
409 if (err) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
410 if (errstring != NULL && *errstring == NULL) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
411 int len;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
412 len = 20 + strlen(gai_strerror(err));
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
413 *errstring = (char*)m_malloc(len);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
414 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
415 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
416 if (res0) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
417 freeaddrinfo(res0);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
418 res0 = NULL;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
419 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
420 TRACE(("leave dropbear_listen: failed resolving"))
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
421 return -1;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
422 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
423
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
424
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
425 nsock = 0;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
426 for (res = res0; res != NULL && nsock < sockcount;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
427 res = res->ai_next) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
428
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
429 /* Get a socket */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
430 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
431 res->ai_protocol);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
432
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
433 sock = socks[nsock]; /* For clarity */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
434
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
435 if (sock < 0) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
436 err = errno;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
437 TRACE(("socket() failed"))
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
438 continue;
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
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
441 /* Various useful socket options */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
442 val = 1;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
443 /* set to reuse, quick timeout */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
444 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
445 linger.l_onoff = 1;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
446 linger.l_linger = 5;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
447 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
448
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
449 #if defined(IPPROTO_IPV6) && defined(IPV6_V6ONLY)
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
450 if (res->ai_family == AF_INET6) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
451 int on = 1;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
452 if (setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY,
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
453 &on, sizeof(on)) == -1) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
454 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
455 }
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 #endif
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
458
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
459 set_sock_nodelay(sock);
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 (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
462 err = errno;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
463 close(sock);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
464 TRACE(("bind(%s) failed", port))
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
465 continue;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
466 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
467
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
468 if (listen(sock, DROPBEAR_LISTEN_BACKLOG) < 0) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
469 err = errno;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
470 close(sock);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
471 TRACE(("listen() failed"))
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
472 continue;
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
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
475 *maxfd = MAX(*maxfd, sock);
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 nsock++;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
478 }
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 if (res0) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
481 freeaddrinfo(res0);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
482 res0 = NULL;
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
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
485 if (nsock == 0) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
486 if (errstring != NULL && *errstring == NULL) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
487 int len;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
488 len = 20 + strlen(strerror(err));
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
489 *errstring = (char*)m_malloc(len);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
490 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
491 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
492 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
493 return -1;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
494 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
495
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
496 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
497 return nsock;
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
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
500 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
501 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
502 {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
503 struct sockaddr_storage addr;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
504 socklen_t addrlen;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
505
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
506 if (local_host || local_port) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
507 addrlen = sizeof(addr);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
508 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
509 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
510 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
511 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
512 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
513 if (remote_host || remote_port) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
514 addrlen = sizeof(addr);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
515 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
516 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
517 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
518 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
519 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
520 }
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 /* 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
523 * value is allocated with malloc() */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
524 void getaddrstring(struct sockaddr_storage* addr,
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
525 char **ret_host, char **ret_port,
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
526 int host_lookup) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
527
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
528 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
529 unsigned int len;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
530 int ret;
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 int flags = NI_NUMERICSERV | NI_NUMERICHOST;
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 #ifndef DO_HOST_LOOKUP
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
535 host_lookup = 0;
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
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
538 if (host_lookup) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
539 flags = NI_NUMERICSERV;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
540 }
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 len = sizeof(struct sockaddr_storage);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
543 /* 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
544 * 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
545 * 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
546 * but we'll ignore them */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
547 #ifdef HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
548 if (addr->ss_family == AF_INET) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
549 len = sizeof(struct sockaddr_in);
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 #ifdef AF_INET6
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
552 if (addr->ss_family == AF_INET6) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
553 len = sizeof(struct sockaddr_in6);
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 #endif
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
556 #endif
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 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
559 serv, sizeof(serv)-1, flags);
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 (ret != 0) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
562 if (host_lookup) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
563 /* 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
564 * 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
565 * to exhibit that behaviour. */
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
566 getaddrstring(addr, ret_host, ret_port, 0);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
567 return;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
568 } else {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
569 /* 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
570 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
571 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
572 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
573
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
574 if (ret_host) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
575 *ret_host = m_strdup(host);
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
576 }
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
577 if (ret_port) {
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
578 *ret_port = m_strdup(serv);
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