dropbear: netio.c annotate

annotate netio.c @ 1078:b3b772646974

Should be AF_UNSPEC not PF_UNSPEC

author	Matt Johnston <matt@ucc.asn.au>
date	Fri, 17 Apr 2015 20:59:32 +0800
parents	d92597ef089e
children	2265d7ebfdeb c45d65392c1a

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;
1033 ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	75 #endif
1032 0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	76
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	77 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	78 {
1067 ce21d0bfaf98 dropbear_assert() rather than assert() Matt Johnston <matt@ucc.asn.au> parents: 1066 diff changeset	79 dropbear_assert(c->sock == -1);
1032 0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	80
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	81 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	82 if (c->sock < 0) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	83 continue;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	84 }
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 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	87 set_sock_nodelay(c->sock);
1032 0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	88 setnonblocking(c->sock);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	89
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	90 #if defined(__linux__) && defined(TCP_DEFER_ACCEPT)
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	91 set_piggyback_ack(c->sock);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	92 #endif
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	93
1033 ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	94 #ifdef DROPBEAR_TCP_FAST_OPEN
ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	95 fastopen = (c->writequeue != NULL);
1032 0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	96
1033 ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	97 memset(&message, 0x0, sizeof(message));
ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	98 message.msg_name = r->ai_addr;
ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	99 message.msg_namelen = r->ai_addrlen;
1032 0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	100
1033 ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	101 if (c->writequeue) {
1072 686cd3e8e13e avoid malloc for iovec Matt Johnston <matt@ucc.asn.au> parents: 1067 diff changeset	102 /* 6 is arbitrary, enough to hold initial packets */
686cd3e8e13e avoid malloc for iovec Matt Johnston <matt@ucc.asn.au> parents: 1067 diff changeset	103 int iovlen = 6; /* Linux msg_iovlen is a size_t */
1076 d92597ef089e fastopen code was totally broken Matt Johnston <matt@ucc.asn.au> parents: 1073 diff changeset	104 struct iovec iov[6];
1072 686cd3e8e13e avoid malloc for iovec Matt Johnston <matt@ucc.asn.au> parents: 1067 diff changeset	105 packet_queue_to_iovec(c->writequeue, iov, &iovlen);
1076 d92597ef089e fastopen code was totally broken Matt Johnston <matt@ucc.asn.au> parents: 1073 diff changeset	106 message.msg_iov = iov;
1033 ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	107 message.msg_iovlen = iovlen;
ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	108 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	109 if (res < 0 && errno != EINPROGRESS) {
1065 23103e1e9548 Fix error handling for dbclient async connect Matt Johnston <matt@ucc.asn.au> parents: 1053 diff changeset	110 m_free(c->errstring);
23103e1e9548 Fix error handling for dbclient async connect Matt Johnston <matt@ucc.asn.au> parents: 1053 diff changeset	111 c->errstring = m_strdup(strerror(errno));
1047 e6c4cd0510d9 ignore any sendmsg() errors Matt Johnston <matt@ucc.asn.au> parents: 1035 diff changeset	112 /* 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	113 return EPIPE for any (nonblocking?) sendmsg(). just fall back */
e6c4cd0510d9 ignore any sendmsg() errors Matt Johnston <matt@ucc.asn.au> parents: 1035 diff changeset	114 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	115 /* No kernel MSG_FASTOPEN support. Fall back below */
ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	116 fastopen = 0;
ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	117 /* Set to NULL to avoid trying again */
ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	118 c->writequeue = NULL;
1032 0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	119 }
1035 8ed1d37e75a6 get rid of some unnecessary code Matt Johnston <matt@ucc.asn.au> parents: 1034 diff changeset	120 packet_queue_consume(c->writequeue, res);
1032 0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	121 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	122 #endif
1033 ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	123
ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	124 /* Normal connect(), used as fallback for TCP fastopen too */
ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	125 if (!fastopen) {
ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	126 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	127 }
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 if (res < 0 && errno != EINPROGRESS) {
1035 8ed1d37e75a6 get rid of some unnecessary code Matt Johnston <matt@ucc.asn.au> parents: 1034 diff changeset	130 /* failure */
1065 23103e1e9548 Fix error handling for dbclient async connect Matt Johnston <matt@ucc.asn.au> parents: 1053 diff changeset	131 m_free(c->errstring);
23103e1e9548 Fix error handling for dbclient async connect Matt Johnston <matt@ucc.asn.au> parents: 1053 diff changeset	132 c->errstring = m_strdup(strerror(errno));
1033 ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	133 close(c->sock);
ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	134 c->sock = -1;
ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	135 continue;
ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	136 } else {
1035 8ed1d37e75a6 get rid of some unnecessary code Matt Johnston <matt@ucc.asn.au> parents: 1034 diff changeset	137 /* 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	138 break;
ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	139 }
1032 0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	140 }
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 if (r) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	143 c->res_iter = r->ai_next;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	144 } else {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	145 c->res_iter = NULL;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	146 }
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 /* Connect via TCP to a host. */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	150 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	151 connect_callback cb, void* cb_data)
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	152 {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	153 struct dropbear_progress_connection *c = NULL;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	154 int err;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	155 struct addrinfo hints;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	156
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	157 c = m_malloc(sizeof(*c));
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	158 c->remotehost = m_strdup(remotehost);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	159 c->remoteport = m_strdup(remoteport);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	160 c->sock = -1;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	161 c->cb = cb;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	162 c->cb_data = cb_data;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	163
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	164 list_append(&ses.conn_pending, 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 Matt Johnston <matt@ucc.asn.au> parents: diff changeset	166 memset(&hints, 0, sizeof(hints));
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	167 hints.ai_socktype = SOCK_STREAM;
1078 b3b772646974 Should be AF_UNSPEC not PF_UNSPEC Matt Johnston <matt@ucc.asn.au> parents: 1076 diff changeset	168 hints.ai_family = AF_UNSPEC;
1032 0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	169
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	170 err = getaddrinfo(remotehost, remoteport, &hints, &c->res);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	171 if (err) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	172 int len;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	173 len = 100 + strlen(gai_strerror(err));
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	174 c->errstring = (char*)m_malloc(len);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	175 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	176 remotehost, remoteport, gai_strerror(err));
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	177 TRACE(("Error resolving: %s", gai_strerror(err)))
1053 fd3712d1ff7f Better failure handling Matt Johnston <matt@ucc.asn.au> parents: 1050 diff changeset	178 } else {
fd3712d1ff7f Better failure handling Matt Johnston <matt@ucc.asn.au> parents: 1050 diff changeset	179 c->res_iter = c->res;
1032 0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	180 }
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 return c;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	183 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	184
1050 c2a50c9f509e Add cleanup Matt Johnston <matt@ucc.asn.au> parents: 1048 diff changeset	185 void remove_connect_pending() {
c2a50c9f509e Add cleanup Matt Johnston <matt@ucc.asn.au> parents: 1048 diff changeset	186 while (ses.conn_pending.first) {
c2a50c9f509e Add cleanup Matt Johnston <matt@ucc.asn.au> parents: 1048 diff changeset	187 struct dropbear_progress_connection *c = ses.conn_pending.first->item;
c2a50c9f509e Add cleanup Matt Johnston <matt@ucc.asn.au> parents: 1048 diff changeset	188 remove_connect(c, ses.conn_pending.first);
c2a50c9f509e Add cleanup Matt Johnston <matt@ucc.asn.au> parents: 1048 diff changeset	189 }
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
1032 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 void set_connect_fds(fd_set *writefd) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	194 m_list_elem *iter;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	195 TRACE(("enter handle_connect_fds"))
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	196 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	197 struct dropbear_progress_connection *c = iter->item;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	198 /* Set one going */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	199 while (c->res_iter && c->sock < 0)
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 connect_try_next(c);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	202 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	203 if (c->sock >= 0) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	204 FD_SET(c->sock, writefd);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	205 } else {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	206 m_list_elem *remove_iter;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	207 /* Final failure */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	208 if (!c->errstring) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	209 c->errstring = m_strdup("unexpected failure");
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	210 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	211 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	212 /* Safely remove without invalidating iter */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	213 remove_iter = iter;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	214 iter = iter->prev;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	215 remove_connect(c, remove_iter);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	216 }
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 void handle_connect_fds(fd_set *writefd) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	221 m_list_elem *iter;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	222 TRACE(("enter handle_connect_fds"))
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	223 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	224 int val;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	225 socklen_t vallen = sizeof(val);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	226 struct dropbear_progress_connection *c = iter->item;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	227
1053 fd3712d1ff7f Better failure handling Matt Johnston <matt@ucc.asn.au> parents: 1050 diff changeset	228 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	229 continue;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	230 }
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 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	233
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	234 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	235 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	236 /* 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	237 m_close(c->sock);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	238 c->sock = -1;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	239 } else if (val != 0) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	240 /* Connect failed */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	241 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	242 m_close(c->sock);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	243 c->sock = -1;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	244
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	245 m_free(c->errstring);
1066 cce03ea8e6eb strdup strerror Matt Johnston <matt@ucc.asn.au> parents: 1065 diff changeset	246 c->errstring = m_strdup(strerror(val));
1032 0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	247 } else {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	248 /* New connection has been established */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	249 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	250 remove_connect(c, iter);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	251 TRACE(("leave handle_connect_fds - success"))
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	252 /* Must return here - remove_connect() invalidates iter */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	253 return;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	254 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	255 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	256 TRACE(("leave handle_connect_fds - end iter"))
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	257 }
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 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	260 c->writequeue = writequeue;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	261 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	262
1072 686cd3e8e13e avoid malloc for iovec Matt Johnston <matt@ucc.asn.au> parents: 1067 diff changeset	263 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	264 struct Link *l;
1034 107b013e9d9d avoid some warnings Matt Johnston <matt@ucc.asn.au> parents: 1033 diff changeset	265 unsigned int i;
1032 0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	266 int len;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	267 buffer *writebuf;
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 #ifndef IOV_MAX
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	270 #define IOV_MAX UIO_MAXIOV
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	271 #endif
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	272
1072 686cd3e8e13e avoid malloc for iovec Matt Johnston <matt@ucc.asn.au> parents: 1067 diff changeset	273 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	274
1073 88043f9d40bd Fix when iov queue is large Matt Johnston <matt@ucc.asn.au> parents: 1072 diff changeset	275 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	276 {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	277 writebuf = (buffer*)l->item;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	278 len = writebuf->len - 1 - writebuf->pos;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	279 dropbear_assert(len > 0);
1034 107b013e9d9d avoid some warnings Matt Johnston <matt@ucc.asn.au> parents: 1033 diff changeset	280 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	281 len, writebuf->len-1))
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	282 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	283 iov[i].iov_len = len;
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 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	288 buffer *writebuf;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	289 int len;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	290 while (written > 0) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	291 writebuf = (buffer*)examine(queue);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	292 len = writebuf->len - 1 - writebuf->pos;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	293 if (len > written) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	294 /* partial buffer write */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	295 buf_incrpos(writebuf, written);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	296 written = 0;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	297 } else {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	298 written -= len;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	299 dequeue(queue);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	300 buf_free(writebuf);
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 }
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_nodelay(int sock) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	306 int val;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	307
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	308 /* disable nagle */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	309 val = 1;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	310 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	311 }
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 #ifdef DROPBEAR_TCP_FAST_OPEN
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	314 void set_listen_fast_open(int sock) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	315 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	316 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	317 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	318 }
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 #endif
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	322
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	323 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	324
1034 107b013e9d9d avoid some warnings Matt Johnston <matt@ucc.asn.au> parents: 1033 diff changeset	325 int rc;
107b013e9d9d avoid some warnings Matt Johnston <matt@ucc.asn.au> parents: 1033 diff changeset	326 #ifdef IPTOS_LOWDELAY
107b013e9d9d avoid some warnings Matt Johnston <matt@ucc.asn.au> parents: 1033 diff changeset	327 int iptos_val = 0;
107b013e9d9d avoid some warnings Matt Johnston <matt@ucc.asn.au> parents: 1033 diff changeset	328 #endif
107b013e9d9d avoid some warnings Matt Johnston <matt@ucc.asn.au> parents: 1033 diff changeset	329 #ifdef SO_PRIORITY
107b013e9d9d avoid some warnings Matt Johnston <matt@ucc.asn.au> parents: 1033 diff changeset	330 int so_prio_val = 0;
107b013e9d9d avoid some warnings Matt Johnston <matt@ucc.asn.au> parents: 1033 diff changeset	331 #endif
107b013e9d9d avoid some warnings Matt Johnston <matt@ucc.asn.au> parents: 1033 diff changeset	332
1032 0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	333
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	334 /* 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	335 * on a client '-J' proxy pipe */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	336
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	337 /* 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	338 #ifdef IPTOS_LOWDELAY
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 iptos_val = IPTOS_LOWDELAY;
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 iptos_val = IPTOS_THROUGHPUT;
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 #if defined(IPPROTO_IPV6) && defined(IPV6_TCLASS)
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	345 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	346 if (rc < 0 && errno != ENOTSOCK) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	347 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	348 }
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 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	351 if (rc < 0 && errno != ENOTSOCK) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	352 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	353 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	354 #endif
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	355
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	356 #ifdef SO_PRIORITY
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	357 if (prio == DROPBEAR_PRIO_LOWDELAY) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	358 so_prio_val = TC_PRIO_INTERACTIVE;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	359 } else if (prio == DROPBEAR_PRIO_BULK) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	360 so_prio_val = TC_PRIO_BULK;
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 /* 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	363 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	364 if (rc < 0 && errno != ENOTSOCK)
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	365 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	366 strerror(errno));
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	367 #endif
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 }
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 /* Listen on address:port.
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	372 * 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	373 * 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	374 * 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	375 * 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	376 * string.*/
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	377 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	378 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	379
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	380 struct addrinfo hints, res = NULL, res0 = NULL;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	381 int err;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	382 unsigned int nsock;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	383 struct linger linger;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	384 int val;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	385 int sock;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	386
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	387 TRACE(("enter dropbear_listen"))
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	388
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	389 memset(&hints, 0, sizeof(hints));
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	390 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	391 hints.ai_socktype = SOCK_STREAM;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	392
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	393 /* for calling getaddrinfo:
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	394 address == NULL and !AI_PASSIVE: local loopback
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	395 address == NULL and AI_PASSIVE: all interfaces
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	396 address != NULL: whatever the address says */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	397 if (!address) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	398 TRACE(("dropbear_listen: local loopback"))
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	399 } else {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	400 if (address[0] == '\0') {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	401 TRACE(("dropbear_listen: all interfaces"))
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	402 address = NULL;
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 hints.ai_flags = AI_PASSIVE;
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 err = getaddrinfo(address, port, &hints, &res0);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	407
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	408 if (err) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	409 if (errstring != NULL && *errstring == NULL) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	410 int len;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	411 len = 20 + strlen(gai_strerror(err));
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	412 errstring = (char)m_malloc(len);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	413 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	414 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	415 if (res0) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	416 freeaddrinfo(res0);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	417 res0 = NULL;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	418 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	419 TRACE(("leave dropbear_listen: failed resolving"))
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	420 return -1;
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
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 nsock = 0;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	425 for (res = res0; res != NULL && nsock < sockcount;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	426 res = res->ai_next) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	427
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	428 /* Get a socket */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	429 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	430 res->ai_protocol);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	431
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	432 sock = socks[nsock]; /* For clarity */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	433
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	434 if (sock < 0) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	435 err = errno;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	436 TRACE(("socket() failed"))
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	437 continue;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	438 }
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 /* Various useful socket options */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	441 val = 1;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	442 /* set to reuse, quick timeout */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	443 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	444 linger.l_onoff = 1;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	445 linger.l_linger = 5;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	446 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	447
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	448 #if defined(IPPROTO_IPV6) && defined(IPV6_V6ONLY)
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	449 if (res->ai_family == AF_INET6) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	450 int on = 1;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	451 if (setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY,
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	452 &on, sizeof(on)) == -1) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	453 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	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 #endif
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 set_sock_nodelay(sock);
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 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	461 err = errno;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	462 close(sock);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	463 TRACE(("bind(%s) failed", port))
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	464 continue;
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
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	467 if (listen(sock, DROPBEAR_LISTEN_BACKLOG) < 0) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	468 err = errno;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	469 close(sock);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	470 TRACE(("listen() failed"))
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	471 continue;
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
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	474 maxfd = MAX(maxfd, sock);
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 nsock++;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	477 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	478
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	479 if (res0) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	480 freeaddrinfo(res0);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	481 res0 = NULL;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	482 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	483
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	484 if (nsock == 0) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	485 if (errstring != NULL && *errstring == NULL) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	486 int len;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	487 len = 20 + strlen(strerror(err));
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	488 errstring = (char)m_malloc(len);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	489 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	490 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	491 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	492 return -1;
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
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	495 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	496 return nsock;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	497 }
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 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	500 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	501 {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	502 struct sockaddr_storage addr;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	503 socklen_t addrlen;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	504
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	505 if (local_host \|\| local_port) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	506 addrlen = sizeof(addr);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	507 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	508 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	509 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	510 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	511 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	512 if (remote_host \|\| remote_port) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	513 addrlen = sizeof(addr);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	514 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	515 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	516 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	517 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	518 }
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 /* 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	522 * value is allocated with malloc() */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	523 void getaddrstring(struct sockaddr_storage* addr,
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	524 char ret_host, char ret_port,
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	525 int host_lookup) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	526
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	527 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	528 unsigned int len;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	529 int ret;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	530
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	531 int flags = NI_NUMERICSERV \| NI_NUMERICHOST;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	532
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	533 #ifndef DO_HOST_LOOKUP
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	534 host_lookup = 0;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	535 #endif
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	536
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	537 if (host_lookup) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	538 flags = NI_NUMERICSERV;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	539 }
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 len = sizeof(struct sockaddr_storage);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	542 /* 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	543 * 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	544 * 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	545 * but we'll ignore them */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	546 #ifdef HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	547 if (addr->ss_family == AF_INET) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	548 len = sizeof(struct sockaddr_in);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	549 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	550 #ifdef AF_INET6
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	551 if (addr->ss_family == AF_INET6) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	552 len = sizeof(struct sockaddr_in6);
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 #endif
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
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	557 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	558 serv, sizeof(serv)-1, flags);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	559
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	560 if (ret != 0) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	561 if (host_lookup) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	562 /* 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	563 * 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	564 * to exhibit that behaviour. */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	565 getaddrstring(addr, ret_host, ret_port, 0);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	566 return;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	567 } else {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	568 /* 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	569 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	570 }
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 if (ret_host) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	574 *ret_host = m_strdup(host);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	575 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	576 if (ret_port) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	577 *ret_port = m_strdup(serv);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	578 }
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

Mercurial > dropbear

annotate netio.c @ 1078:b3b772646974