dropbear: netio.c annotate

annotate netio.c @ 1145:5709b15a1b57

Fix segfault with restricted authorized_key files without forced command

author	Guilhem Moulin <guilhem@fripost.org>
date	Fri, 07 Aug 2015 23:00:08 +0800
parents	a7c4a70ae495
children	57d09741d46d

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 /* 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	25 Does not close sockets */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	26 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	27 if (c->res) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	28 freeaddrinfo(c->res);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	29 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	30 m_free(c->remotehost);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	31 m_free(c->remoteport);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	32 m_free(c->errstring);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	33 m_free(c);
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 if (iter) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	36 list_remove(iter);
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 }
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 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	41 if (result == DROPBEAR_SUCCESS)
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	42 {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	43 m_close(sock);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	44 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	45 }
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 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	48 c->cb = cancel_callback;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	49 c->cb_data = NULL;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	50 }
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 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	53 struct addrinfo *r;
1033 ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	54 int res = 0;
ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	55 int fastopen = 0;
1084 2265d7ebfdeb separate client/server fastopen options Matt Johnston <matt@ucc.asn.au> parents: 1078 diff changeset	56 #ifdef DROPBEAR_CLIENT_TCP_FAST_OPEN
1035 8ed1d37e75a6 get rid of some unnecessary code Matt Johnston <matt@ucc.asn.au> parents: 1034 diff changeset	57 struct msghdr message;
1033 ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	58 #endif
1032 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 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	61 {
1067 ce21d0bfaf98 dropbear_assert() rather than assert() Matt Johnston <matt@ucc.asn.au> parents: 1066 diff changeset	62 dropbear_assert(c->sock == -1);
1032 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 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	65 if (c->sock < 0) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	66 continue;
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 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	70 set_sock_nodelay(c->sock);
1032 0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	71 setnonblocking(c->sock);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	72
1084 2265d7ebfdeb separate client/server fastopen options Matt Johnston <matt@ucc.asn.au> parents: 1078 diff changeset	73 #ifdef DROPBEAR_CLIENT_TCP_FAST_OPEN
1033 ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	74 fastopen = (c->writequeue != NULL);
1032 0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	75
1084 2265d7ebfdeb separate client/server fastopen options Matt Johnston <matt@ucc.asn.au> parents: 1078 diff changeset	76 if (fastopen) {
2265d7ebfdeb separate client/server fastopen options Matt Johnston <matt@ucc.asn.au> parents: 1078 diff changeset	77 memset(&message, 0x0, sizeof(message));
2265d7ebfdeb separate client/server fastopen options Matt Johnston <matt@ucc.asn.au> parents: 1078 diff changeset	78 message.msg_name = r->ai_addr;
2265d7ebfdeb separate client/server fastopen options Matt Johnston <matt@ucc.asn.au> parents: 1078 diff changeset	79 message.msg_namelen = r->ai_addrlen;
1072 686cd3e8e13e avoid malloc for iovec Matt Johnston <matt@ucc.asn.au> parents: 1067 diff changeset	80 /* 6 is arbitrary, enough to hold initial packets */
1094 c45d65392c1a Fix pointer differ in signess warnings [-Werror=pointer-sign] Gaël PORTAY <gael.portay@gmail.com> parents: 1078 diff changeset	81 unsigned 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	82 struct iovec iov[6];
1072 686cd3e8e13e avoid malloc for iovec Matt Johnston <matt@ucc.asn.au> parents: 1067 diff changeset	83 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	84 message.msg_iov = iov;
1033 ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	85 message.msg_iovlen = iovlen;
ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	86 res = sendmsg(c->sock, &message, MSG_FASTOPEN);
1084 2265d7ebfdeb separate client/server fastopen options Matt Johnston <matt@ucc.asn.au> parents: 1078 diff changeset	87 /* Returns EINPROGRESS if FASTOPEN wasn't available */
2265d7ebfdeb separate client/server fastopen options Matt Johnston <matt@ucc.asn.au> parents: 1078 diff changeset	88 if (res < 0) {
2265d7ebfdeb separate client/server fastopen options Matt Johnston <matt@ucc.asn.au> parents: 1078 diff changeset	89 if (errno != EINPROGRESS) {
2265d7ebfdeb separate client/server fastopen options Matt Johnston <matt@ucc.asn.au> parents: 1078 diff changeset	90 m_free(c->errstring);
2265d7ebfdeb separate client/server fastopen options Matt Johnston <matt@ucc.asn.au> parents: 1078 diff changeset	91 c->errstring = m_strdup(strerror(errno));
2265d7ebfdeb separate client/server fastopen options Matt Johnston <matt@ucc.asn.au> parents: 1078 diff changeset	92 /* Not entirely sure which kind of errors are normal - 2.6.32 seems to
2265d7ebfdeb separate client/server fastopen options Matt Johnston <matt@ucc.asn.au> parents: 1078 diff changeset	93 return EPIPE for any (nonblocking?) sendmsg(). just fall back */
2265d7ebfdeb separate client/server fastopen options Matt Johnston <matt@ucc.asn.au> parents: 1078 diff changeset	94 TRACE(("sendmsg tcp_fastopen failed, falling back. %s", strerror(errno)));
2265d7ebfdeb separate client/server fastopen options Matt Johnston <matt@ucc.asn.au> parents: 1078 diff changeset	95 /* No kernel MSG_FASTOPEN support. Fall back below */
2265d7ebfdeb separate client/server fastopen options Matt Johnston <matt@ucc.asn.au> parents: 1078 diff changeset	96 fastopen = 0;
2265d7ebfdeb separate client/server fastopen options Matt Johnston <matt@ucc.asn.au> parents: 1078 diff changeset	97 /* Set to NULL to avoid trying again */
2265d7ebfdeb separate client/server fastopen options Matt Johnston <matt@ucc.asn.au> parents: 1078 diff changeset	98 c->writequeue = NULL;
2265d7ebfdeb separate client/server fastopen options Matt Johnston <matt@ucc.asn.au> parents: 1078 diff changeset	99 }
2265d7ebfdeb separate client/server fastopen options Matt Johnston <matt@ucc.asn.au> parents: 1078 diff changeset	100 } else {
2265d7ebfdeb separate client/server fastopen options Matt Johnston <matt@ucc.asn.au> parents: 1078 diff changeset	101 packet_queue_consume(c->writequeue, res);
1032 0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	102 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	103 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	104 #endif
1033 ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	105
ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	106 /* Normal connect(), used as fallback for TCP fastopen too */
ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	107 if (!fastopen) {
ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	108 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	109 }
ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	110
ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	111 if (res < 0 && errno != EINPROGRESS) {
1035 8ed1d37e75a6 get rid of some unnecessary code Matt Johnston <matt@ucc.asn.au> parents: 1034 diff changeset	112 /* failure */
1065 23103e1e9548 Fix error handling for dbclient async connect Matt Johnston <matt@ucc.asn.au> parents: 1053 diff changeset	113 m_free(c->errstring);
23103e1e9548 Fix error handling for dbclient async connect Matt Johnston <matt@ucc.asn.au> parents: 1053 diff changeset	114 c->errstring = m_strdup(strerror(errno));
1033 ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	115 close(c->sock);
ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	116 c->sock = -1;
ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	117 continue;
ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	118 } else {
1035 8ed1d37e75a6 get rid of some unnecessary code Matt Johnston <matt@ucc.asn.au> parents: 1034 diff changeset	119 /* 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	120 break;
ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	121 }
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
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	124 if (r) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	125 c->res_iter = r->ai_next;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	126 } else {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	127 c->res_iter = NULL;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	128 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	129 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	130
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	131 /* Connect via TCP to a host. */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	132 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	133 connect_callback cb, void* cb_data)
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	134 {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	135 struct dropbear_progress_connection *c = NULL;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	136 int err;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	137 struct addrinfo hints;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	138
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	139 c = m_malloc(sizeof(*c));
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	140 c->remotehost = m_strdup(remotehost);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	141 c->remoteport = m_strdup(remoteport);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	142 c->sock = -1;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	143 c->cb = cb;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	144 c->cb_data = cb_data;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	145
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	146 list_append(&ses.conn_pending, c);
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 memset(&hints, 0, sizeof(hints));
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	149 hints.ai_socktype = SOCK_STREAM;
1078 b3b772646974 Should be AF_UNSPEC not PF_UNSPEC Matt Johnston <matt@ucc.asn.au> parents: 1076 diff changeset	150 hints.ai_family = AF_UNSPEC;
1032 0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	151
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	152 err = getaddrinfo(remotehost, remoteport, &hints, &c->res);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	153 if (err) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	154 int len;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	155 len = 100 + strlen(gai_strerror(err));
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	156 c->errstring = (char*)m_malloc(len);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	157 snprintf(c->errstring, len, "Error resolving '%s' port '%s'. %s",
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	158 remotehost, remoteport, gai_strerror(err));
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	159 TRACE(("Error resolving: %s", gai_strerror(err)))
1053 fd3712d1ff7f Better failure handling Matt Johnston <matt@ucc.asn.au> parents: 1050 diff changeset	160 } else {
fd3712d1ff7f Better failure handling Matt Johnston <matt@ucc.asn.au> parents: 1050 diff changeset	161 c->res_iter = c->res;
1032 0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	162 }
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 return c;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	165 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	166
1050 c2a50c9f509e Add cleanup Matt Johnston <matt@ucc.asn.au> parents: 1048 diff changeset	167 void remove_connect_pending() {
c2a50c9f509e Add cleanup Matt Johnston <matt@ucc.asn.au> parents: 1048 diff changeset	168 while (ses.conn_pending.first) {
c2a50c9f509e Add cleanup Matt Johnston <matt@ucc.asn.au> parents: 1048 diff changeset	169 struct dropbear_progress_connection *c = ses.conn_pending.first->item;
c2a50c9f509e Add cleanup Matt Johnston <matt@ucc.asn.au> parents: 1048 diff changeset	170 remove_connect(c, ses.conn_pending.first);
c2a50c9f509e Add cleanup Matt Johnston <matt@ucc.asn.au> parents: 1048 diff changeset	171 }
c2a50c9f509e Add cleanup Matt Johnston <matt@ucc.asn.au> parents: 1048 diff changeset	172 }
c2a50c9f509e Add cleanup Matt Johnston <matt@ucc.asn.au> parents: 1048 diff changeset	173
1032 0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	174
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	175 void set_connect_fds(fd_set *writefd) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	176 m_list_elem *iter;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	177 TRACE(("enter handle_connect_fds"))
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	178 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	179 struct dropbear_progress_connection *c = iter->item;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	180 /* Set one going */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	181 while (c->res_iter && c->sock < 0)
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	182 {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	183 connect_try_next(c);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	184 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	185 if (c->sock >= 0) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	186 FD_SET(c->sock, writefd);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	187 } else {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	188 m_list_elem *remove_iter;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	189 /* Final failure */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	190 if (!c->errstring) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	191 c->errstring = m_strdup("unexpected failure");
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	192 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	193 c->cb(DROPBEAR_FAILURE, -1, c->cb_data, c->errstring);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	194 /* Safely remove without invalidating iter */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	195 remove_iter = iter;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	196 iter = iter->prev;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	197 remove_connect(c, remove_iter);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	198 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	199 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	200 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	201
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	202 void handle_connect_fds(fd_set *writefd) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	203 m_list_elem *iter;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	204 TRACE(("enter handle_connect_fds"))
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	205 for (iter = ses.conn_pending.first; iter; iter = iter->next) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	206 int val;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	207 socklen_t vallen = sizeof(val);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	208 struct dropbear_progress_connection *c = iter->item;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	209
1053 fd3712d1ff7f Better failure handling Matt Johnston <matt@ucc.asn.au> parents: 1050 diff changeset	210 if (c->sock < 0 \|\| !FD_ISSET(c->sock, writefd)) {
1032 0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	211 continue;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	212 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	213
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	214 TRACE(("handling %s port %s socket %d", c->remotehost, c->remoteport, c->sock));
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	215
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	216 if (getsockopt(c->sock, SOL_SOCKET, SO_ERROR, &val, &vallen) != 0) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	217 TRACE(("handle_connect_fds getsockopt(%d) SO_ERROR failed: %s", c->sock, strerror(errno)))
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	218 /* This isn't expected to happen - Unix has surprises though, continue gracefully. */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	219 m_close(c->sock);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	220 c->sock = -1;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	221 } else if (val != 0) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	222 /* Connect failed */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	223 TRACE(("connect to %s port %s failed.", c->remotehost, c->remoteport))
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	224 m_close(c->sock);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	225 c->sock = -1;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	226
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	227 m_free(c->errstring);
1066 cce03ea8e6eb strdup strerror Matt Johnston <matt@ucc.asn.au> parents: 1065 diff changeset	228 c->errstring = m_strdup(strerror(val));
1032 0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	229 } else {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	230 /* New connection has been established */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	231 c->cb(DROPBEAR_SUCCESS, c->sock, c->cb_data, NULL);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	232 remove_connect(c, iter);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	233 TRACE(("leave handle_connect_fds - success"))
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	234 /* Must return here - remove_connect() invalidates iter */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	235 return;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	236 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	237 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	238 TRACE(("leave handle_connect_fds - end iter"))
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	239 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	240
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	241 void connect_set_writequeue(struct dropbear_progress_connection c, struct Queue writequeue) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	242 c->writequeue = writequeue;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	243 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	244
1072 686cd3e8e13e avoid malloc for iovec Matt Johnston <matt@ucc.asn.au> parents: 1067 diff changeset	245 void packet_queue_to_iovec(struct Queue queue, struct iovec iov, unsigned int *iov_count) {
1032 0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	246 struct Link *l;
1034 107b013e9d9d avoid some warnings Matt Johnston <matt@ucc.asn.au> parents: 1033 diff changeset	247 unsigned int i;
1032 0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	248 int len;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	249 buffer *writebuf;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	250
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	251 #ifndef IOV_MAX
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	252 #define IOV_MAX UIO_MAXIOV
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	253 #endif
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	254
1072 686cd3e8e13e avoid malloc for iovec Matt Johnston <matt@ucc.asn.au> parents: 1067 diff changeset	255 iov_count = MIN(MIN(queue->count, IOV_MAX), iov_count);
1032 0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	256
1073 88043f9d40bd Fix when iov queue is large Matt Johnston <matt@ucc.asn.au> parents: 1072 diff changeset	257 for (l = queue->head, i = 0; i < *iov_count; l = l->link, i++)
1032 0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	258 {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	259 writebuf = (buffer*)l->item;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	260 len = writebuf->len - 1 - writebuf->pos;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	261 dropbear_assert(len > 0);
1034 107b013e9d9d avoid some warnings Matt Johnston <matt@ucc.asn.au> parents: 1033 diff changeset	262 TRACE2(("write_packet writev #%d type %d len %d/%d", i, writebuf->data[writebuf->len-1],
1032 0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	263 len, writebuf->len-1))
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	264 iov[i].iov_base = buf_getptr(writebuf, len);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	265 iov[i].iov_len = len;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	266 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	267 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	268
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	269 void packet_queue_consume(struct Queue *queue, ssize_t written) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	270 buffer *writebuf;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	271 int len;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	272 while (written > 0) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	273 writebuf = (buffer*)examine(queue);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	274 len = writebuf->len - 1 - writebuf->pos;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	275 if (len > written) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	276 /* partial buffer write */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	277 buf_incrpos(writebuf, written);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	278 written = 0;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	279 } else {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	280 written -= len;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	281 dequeue(queue);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	282 buf_free(writebuf);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	283 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	284 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	285 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	286
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	287 void set_sock_nodelay(int sock) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	288 int val;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	289
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	290 /* disable nagle */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	291 val = 1;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	292 setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, (void*)&val, sizeof(val));
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	293 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	294
1084 2265d7ebfdeb separate client/server fastopen options Matt Johnston <matt@ucc.asn.au> parents: 1078 diff changeset	295 #ifdef DROPBEAR_SERVER_TCP_FAST_OPEN
1032 0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	296 void set_listen_fast_open(int sock) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	297 int qlen = MAX(MAX_UNAUTH_PER_IP, 5);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	298 if (setsockopt(sock, SOL_TCP, TCP_FASTOPEN, &qlen, sizeof(qlen)) != 0) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	299 TRACE(("set_listen_fast_open failed for socket %d: %s", sock, strerror(errno)))
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	300 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	301 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	302
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	303 #endif
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	304
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	305 void set_sock_priority(int sock, enum dropbear_prio prio) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	306
1034 107b013e9d9d avoid some warnings Matt Johnston <matt@ucc.asn.au> parents: 1033 diff changeset	307 int rc;
107b013e9d9d avoid some warnings Matt Johnston <matt@ucc.asn.au> parents: 1033 diff changeset	308 #ifdef IPTOS_LOWDELAY
107b013e9d9d avoid some warnings Matt Johnston <matt@ucc.asn.au> parents: 1033 diff changeset	309 int iptos_val = 0;
107b013e9d9d avoid some warnings Matt Johnston <matt@ucc.asn.au> parents: 1033 diff changeset	310 #endif
107b013e9d9d avoid some warnings Matt Johnston <matt@ucc.asn.au> parents: 1033 diff changeset	311 #ifdef SO_PRIORITY
107b013e9d9d avoid some warnings Matt Johnston <matt@ucc.asn.au> parents: 1033 diff changeset	312 int so_prio_val = 0;
107b013e9d9d avoid some warnings Matt Johnston <matt@ucc.asn.au> parents: 1033 diff changeset	313 #endif
107b013e9d9d avoid some warnings Matt Johnston <matt@ucc.asn.au> parents: 1033 diff changeset	314
1032 0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	315
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	316 /* Don't log ENOTSOCK errors so that this can harmlessly be called
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	317 * on a client '-J' proxy pipe */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	318
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	319 /* set the TOS bit for either ipv4 or ipv6 */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	320 #ifdef IPTOS_LOWDELAY
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	321 if (prio == DROPBEAR_PRIO_LOWDELAY) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	322 iptos_val = IPTOS_LOWDELAY;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	323 } else if (prio == DROPBEAR_PRIO_BULK) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	324 iptos_val = IPTOS_THROUGHPUT;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	325 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	326 #if defined(IPPROTO_IPV6) && defined(IPV6_TCLASS)
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	327 rc = setsockopt(sock, IPPROTO_IPV6, IPV6_TCLASS, (void*)&iptos_val, sizeof(iptos_val));
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	328 if (rc < 0 && errno != ENOTSOCK) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	329 TRACE(("Couldn't set IPV6_TCLASS (%s)", strerror(errno)));
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	330 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	331 #endif
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	332 rc = setsockopt(sock, IPPROTO_IP, IP_TOS, (void*)&iptos_val, sizeof(iptos_val));
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	333 if (rc < 0 && errno != ENOTSOCK) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	334 TRACE(("Couldn't set IP_TOS (%s)", strerror(errno)));
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	335 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	336 #endif
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	337
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	338 #ifdef SO_PRIORITY
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	339 if (prio == DROPBEAR_PRIO_LOWDELAY) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	340 so_prio_val = TC_PRIO_INTERACTIVE;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	341 } else if (prio == DROPBEAR_PRIO_BULK) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	342 so_prio_val = TC_PRIO_BULK;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	343 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	344 /* linux specific, sets QoS class. see tc-prio(8) */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	345 rc = setsockopt(sock, SOL_SOCKET, SO_PRIORITY, (void*) &so_prio_val, sizeof(so_prio_val));
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	346 if (rc < 0 && errno != ENOTSOCK)
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	347 dropbear_log(LOG_WARNING, "Couldn't set SO_PRIORITY (%s)",
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	348 strerror(errno));
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	349 #endif
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	350
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	351 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	352
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	353 /* Listen on address:port.
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	354 * Special cases are address of "" listening on everything,
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	355 * and address of NULL listening on localhost only.
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	356 * Returns the number of sockets bound on success, or -1 on failure. On
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	357 * failure, if errstring wasn't NULL, it'll be a newly malloced error
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	358 * string.*/
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	359 int dropbear_listen(const char* address, const char* port,
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	360 int socks, unsigned int sockcount, char errstring, int maxfd) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	361
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	362 struct addrinfo hints, res = NULL, res0 = NULL;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	363 int err;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	364 unsigned int nsock;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	365 struct linger linger;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	366 int val;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	367 int sock;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	368
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	369 TRACE(("enter dropbear_listen"))
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	370
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	371 memset(&hints, 0, sizeof(hints));
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	372 hints.ai_family = AF_UNSPEC; /* TODO: let them flag v4 only etc */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	373 hints.ai_socktype = SOCK_STREAM;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	374
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	375 /* for calling getaddrinfo:
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	376 address == NULL and !AI_PASSIVE: local loopback
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	377 address == NULL and AI_PASSIVE: all interfaces
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	378 address != NULL: whatever the address says */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	379 if (!address) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	380 TRACE(("dropbear_listen: local loopback"))
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	381 } else {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	382 if (address[0] == '\0') {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	383 TRACE(("dropbear_listen: all interfaces"))
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	384 address = NULL;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	385 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	386 hints.ai_flags = AI_PASSIVE;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	387 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	388 err = getaddrinfo(address, port, &hints, &res0);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	389
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	390 if (err) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	391 if (errstring != NULL && *errstring == NULL) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	392 int len;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	393 len = 20 + strlen(gai_strerror(err));
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	394 errstring = (char)m_malloc(len);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	395 snprintf(*errstring, len, "Error resolving: %s", gai_strerror(err));
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	396 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	397 if (res0) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	398 freeaddrinfo(res0);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	399 res0 = NULL;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	400 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	401 TRACE(("leave dropbear_listen: failed resolving"))
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	402 return -1;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	403 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	404
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	405
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	406 nsock = 0;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	407 for (res = res0; res != NULL && nsock < sockcount;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	408 res = res->ai_next) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	409
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	410 /* Get a socket */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	411 socks[nsock] = socket(res->ai_family, res->ai_socktype,
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	412 res->ai_protocol);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	413
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	414 sock = socks[nsock]; /* For clarity */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	415
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	416 if (sock < 0) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	417 err = errno;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	418 TRACE(("socket() failed"))
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	419 continue;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	420 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	421
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	422 /* Various useful socket options */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	423 val = 1;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	424 /* set to reuse, quick timeout */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	425 setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (void*) &val, sizeof(val));
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	426 linger.l_onoff = 1;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	427 linger.l_linger = 5;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	428 setsockopt(sock, SOL_SOCKET, SO_LINGER, (void*)&linger, sizeof(linger));
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	429
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	430 #if defined(IPPROTO_IPV6) && defined(IPV6_V6ONLY)
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	431 if (res->ai_family == AF_INET6) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	432 int on = 1;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	433 if (setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY,
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	434 &on, sizeof(on)) == -1) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	435 dropbear_log(LOG_WARNING, "Couldn't set IPV6_V6ONLY");
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	436 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	437 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	438 #endif
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	439
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	440 set_sock_nodelay(sock);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	441
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	442 if (bind(sock, res->ai_addr, res->ai_addrlen) < 0) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	443 err = errno;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	444 close(sock);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	445 TRACE(("bind(%s) failed", port))
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	446 continue;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	447 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	448
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	449 if (listen(sock, DROPBEAR_LISTEN_BACKLOG) < 0) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	450 err = errno;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	451 close(sock);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	452 TRACE(("listen() failed"))
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	453 continue;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	454 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	455
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	456 maxfd = MAX(maxfd, sock);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	457
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	458 nsock++;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	459 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	460
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	461 if (res0) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	462 freeaddrinfo(res0);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	463 res0 = NULL;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	464 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	465
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	466 if (nsock == 0) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	467 if (errstring != NULL && *errstring == NULL) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	468 int len;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	469 len = 20 + strlen(strerror(err));
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	470 errstring = (char)m_malloc(len);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	471 snprintf(*errstring, len, "Error listening: %s", strerror(err));
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	472 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	473 TRACE(("leave dropbear_listen: failure, %s", strerror(err)))
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	474 return -1;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	475 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	476
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	477 TRACE(("leave dropbear_listen: success, %d socks bound", nsock))
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	478 return nsock;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	479 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	480
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	481 void get_socket_address(int fd, char local_host, char local_port,
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	482 char remote_host, char remote_port, int host_lookup)
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	483 {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	484 struct sockaddr_storage addr;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	485 socklen_t addrlen;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	486
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	487 if (local_host \|\| local_port) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	488 addrlen = sizeof(addr);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	489 if (getsockname(fd, (struct sockaddr*)&addr, &addrlen) < 0) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	490 dropbear_exit("Failed socket address: %s", strerror(errno));
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	491 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	492 getaddrstring(&addr, local_host, local_port, host_lookup);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	493 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	494 if (remote_host \|\| remote_port) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	495 addrlen = sizeof(addr);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	496 if (getpeername(fd, (struct sockaddr*)&addr, &addrlen) < 0) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	497 dropbear_exit("Failed socket address: %s", strerror(errno));
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	498 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	499 getaddrstring(&addr, remote_host, remote_port, host_lookup);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	500 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	501 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	502
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	503 /* Return a string representation of the socket address passed. The return
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	504 * value is allocated with malloc() */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	505 void getaddrstring(struct sockaddr_storage* addr,
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	506 char ret_host, char ret_port,
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	507 int host_lookup) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	508
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	509 char host[NI_MAXHOST+1], serv[NI_MAXSERV+1];
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	510 unsigned int len;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	511 int ret;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	512
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	513 int flags = NI_NUMERICSERV \| NI_NUMERICHOST;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	514
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	515 #ifndef DO_HOST_LOOKUP
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	516 host_lookup = 0;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	517 #endif
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	518
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	519 if (host_lookup) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	520 flags = NI_NUMERICSERV;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	521 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	522
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	523 len = sizeof(struct sockaddr_storage);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	524 /* Some platforms such as Solaris 8 require that len is the length
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	525 * of the specific structure. Some older linux systems (glibc 2.1.3
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	526 * such as debian potato) have sockaddr_storage.__ss_family instead
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	527 * but we'll ignore them */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	528 #ifdef HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	529 if (addr->ss_family == AF_INET) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	530 len = sizeof(struct sockaddr_in);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	531 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	532 #ifdef AF_INET6
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	533 if (addr->ss_family == AF_INET6) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	534 len = sizeof(struct sockaddr_in6);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	535 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	536 #endif
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	537 #endif
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	538
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	539 ret = getnameinfo((struct sockaddr*)addr, len, host, sizeof(host)-1,
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	540 serv, sizeof(serv)-1, flags);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	541
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	542 if (ret != 0) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	543 if (host_lookup) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	544 /* On some systems (Darwin does it) we get EINTR from getnameinfo
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	545 * somehow. Eew. So we'll just return the IP, since that doesn't seem
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	546 * to exhibit that behaviour. */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	547 getaddrstring(addr, ret_host, ret_port, 0);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	548 return;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	549 } else {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	550 /* if we can't do a numeric lookup, something's gone terribly wrong */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	551 dropbear_exit("Failed lookup: %s", gai_strerror(ret));
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	552 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	553 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	554
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	555 if (ret_host) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	556 *ret_host = m_strdup(host);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	557 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	558 if (ret_port) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	559 *ret_port = m_strdup(serv);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	560 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	561 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	562

Mercurial > dropbear

annotate netio.c @ 1145:5709b15a1b57