dropbear: netio.c annotate

annotate netio.c @ 1060:4c733310c21d nocircbuffer

reword comment for clarity

author	Matt Johnston <matt@ucc.asn.au>
date	Sun, 01 Mar 2015 23:26:42 +0800
parents	fd3712d1ff7f
children	23103e1e9548

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 {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	79 assert(c->sock == -1);
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) {
ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	102 int iovlen; /* Linux msg_iovlen is a size_t */
ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	103 message.msg_iov = packet_queue_to_iovec(c->writequeue, &iovlen);
ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	104 message.msg_iovlen = iovlen;
ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	105 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	106 if (res < 0 && errno != EINPROGRESS) {
1047 e6c4cd0510d9 ignore any sendmsg() errors Matt Johnston <matt@ucc.asn.au> parents: 1035 diff changeset	107 /* 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	108 return EPIPE for any (nonblocking?) sendmsg(). just fall back */
e6c4cd0510d9 ignore any sendmsg() errors Matt Johnston <matt@ucc.asn.au> parents: 1035 diff changeset	109 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	110 /* No kernel MSG_FASTOPEN support. Fall back below */
ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	111 fastopen = 0;
ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	112 /* Set to NULL to avoid trying again */
ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	113 c->writequeue = NULL;
1032 0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	114 }
1033 ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	115 m_free(message.msg_iov);
1035 8ed1d37e75a6 get rid of some unnecessary code Matt Johnston <matt@ucc.asn.au> parents: 1034 diff changeset	116 packet_queue_consume(c->writequeue, res);
1032 0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	117 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	118 #endif
1033 ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	119
ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	120 /* Normal connect(), used as fallback for TCP fastopen too */
ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	121 if (!fastopen) {
ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	122 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	123 }
ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	124
ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	125 if (res < 0 && errno != EINPROGRESS) {
1035 8ed1d37e75a6 get rid of some unnecessary code Matt Johnston <matt@ucc.asn.au> parents: 1034 diff changeset	126 /* failure */
1033 ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	127 close(c->sock);
ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	128 c->sock = -1;
ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	129 continue;
ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	130 } else {
1035 8ed1d37e75a6 get rid of some unnecessary code Matt Johnston <matt@ucc.asn.au> parents: 1034 diff changeset	131 /* 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	132 break;
ca71904cf3ee Fixes for backwards compatibility Matt Johnston <matt@ucc.asn.au> parents: 1032 diff changeset	133 }
1032 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
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	136 if (r) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	137 c->res_iter = r->ai_next;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	138 } else {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	139 c->res_iter = NULL;
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
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	143 /* Connect via TCP to a host. */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	144 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	145 connect_callback cb, void* cb_data)
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 struct dropbear_progress_connection *c = NULL;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	148 int err;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	149 struct addrinfo hints;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	150
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	151 c = m_malloc(sizeof(*c));
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	152 c->remotehost = m_strdup(remotehost);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	153 c->remoteport = m_strdup(remoteport);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	154 c->sock = -1;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	155 c->cb = cb;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	156 c->cb_data = cb_data;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	157
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	158 list_append(&ses.conn_pending, c);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	159
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	160 memset(&hints, 0, sizeof(hints));
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	161 hints.ai_socktype = SOCK_STREAM;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	162 hints.ai_family = PF_UNSPEC;
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 err = getaddrinfo(remotehost, remoteport, &hints, &c->res);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	165 if (err) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	166 int len;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	167 len = 100 + strlen(gai_strerror(err));
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	168 c->errstring = (char*)m_malloc(len);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	169 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	170 remotehost, remoteport, gai_strerror(err));
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	171 TRACE(("Error resolving: %s", gai_strerror(err)))
1053 fd3712d1ff7f Better failure handling Matt Johnston <matt@ucc.asn.au> parents: 1050 diff changeset	172 } else {
fd3712d1ff7f Better failure handling Matt Johnston <matt@ucc.asn.au> parents: 1050 diff changeset	173 c->res_iter = c->res;
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
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	176 return c;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	177 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	178
1050 c2a50c9f509e Add cleanup Matt Johnston <matt@ucc.asn.au> parents: 1048 diff changeset	179 void remove_connect_pending() {
c2a50c9f509e Add cleanup Matt Johnston <matt@ucc.asn.au> parents: 1048 diff changeset	180 while (ses.conn_pending.first) {
c2a50c9f509e Add cleanup Matt Johnston <matt@ucc.asn.au> parents: 1048 diff changeset	181 struct dropbear_progress_connection *c = ses.conn_pending.first->item;
c2a50c9f509e Add cleanup Matt Johnston <matt@ucc.asn.au> parents: 1048 diff changeset	182 remove_connect(c, ses.conn_pending.first);
c2a50c9f509e Add cleanup Matt Johnston <matt@ucc.asn.au> parents: 1048 diff changeset	183 }
c2a50c9f509e Add cleanup Matt Johnston <matt@ucc.asn.au> parents: 1048 diff changeset	184 }
c2a50c9f509e Add cleanup Matt Johnston <matt@ucc.asn.au> parents: 1048 diff changeset	185
1032 0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	186
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	187 void set_connect_fds(fd_set *writefd) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	188 m_list_elem *iter;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	189 TRACE(("enter handle_connect_fds"))
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	190 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	191 struct dropbear_progress_connection *c = iter->item;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	192 /* Set one going */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	193 while (c->res_iter && c->sock < 0)
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	194 {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	195 connect_try_next(c);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	196 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	197 if (c->sock >= 0) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	198 FD_SET(c->sock, writefd);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	199 } else {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	200 m_list_elem *remove_iter;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	201 /* Final failure */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	202 if (!c->errstring) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	203 c->errstring = m_strdup("unexpected failure");
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	204 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	205 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	206 /* Safely remove without invalidating iter */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	207 remove_iter = iter;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	208 iter = iter->prev;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	209 remove_connect(c, remove_iter);
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 }
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 void handle_connect_fds(fd_set *writefd) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	215 m_list_elem *iter;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	216 TRACE(("enter handle_connect_fds"))
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	217 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	218 int val;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	219 socklen_t vallen = sizeof(val);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	220 struct dropbear_progress_connection *c = iter->item;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	221
1053 fd3712d1ff7f Better failure handling Matt Johnston <matt@ucc.asn.au> parents: 1050 diff changeset	222 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	223 continue;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	224 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	225
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	226 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	227
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	228 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	229 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	230 /* 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	231 m_close(c->sock);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	232 c->sock = -1;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	233 } else if (val != 0) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	234 /* Connect failed */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	235 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	236 m_close(c->sock);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	237 c->sock = -1;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	238
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	239 m_free(c->errstring);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	240 c->errstring = strerror(val);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	241 } else {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	242 /* New connection has been established */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	243 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	244 remove_connect(c, iter);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	245 TRACE(("leave handle_connect_fds - success"))
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	246 /* Must return here - remove_connect() invalidates iter */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	247 return;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	248 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	249 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	250 TRACE(("leave handle_connect_fds - end iter"))
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	251 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	252
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	253 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	254 c->writequeue = writequeue;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	255 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	256
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	257 struct iovec * packet_queue_to_iovec(struct Queue queue, int ret_iov_count) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	258 struct iovec *iov = NULL;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	259 struct Link *l;
1034 107b013e9d9d avoid some warnings Matt Johnston <matt@ucc.asn.au> parents: 1033 diff changeset	260 unsigned int i;
1032 0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	261 int len;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	262 buffer *writebuf;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	263
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	264 #ifndef IOV_MAX
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	265 #define IOV_MAX UIO_MAXIOV
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	266 #endif
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 *ret_iov_count = MIN(queue->count, IOV_MAX);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	269
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	270 iov = m_malloc(sizeof(iov) *ret_iov_count);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	271 for (l = queue->head, i = 0; l; l = l->link, i++)
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	272 {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	273 writebuf = (buffer*)l->item;
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 dropbear_assert(len > 0);
1034 107b013e9d9d avoid some warnings Matt Johnston <matt@ucc.asn.au> parents: 1033 diff changeset	276 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	277 len, writebuf->len-1))
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	278 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	279 iov[i].iov_len = len;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	280 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	281
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	282 return iov;
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 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	286 buffer *writebuf;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	287 int len;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	288 while (written > 0) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	289 writebuf = (buffer*)examine(queue);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	290 len = writebuf->len - 1 - writebuf->pos;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	291 if (len > written) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	292 /* partial buffer write */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	293 buf_incrpos(writebuf, written);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	294 written = 0;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	295 } else {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	296 written -= len;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	297 dequeue(queue);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	298 buf_free(writebuf);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	299 }
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 void set_sock_nodelay(int sock) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	304 int val;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	305
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	306 /* disable nagle */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	307 val = 1;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	308 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	309 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	310
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	311 #ifdef DROPBEAR_TCP_FAST_OPEN
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	312 void set_listen_fast_open(int sock) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	313 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	314 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	315 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	316 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	317 }
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 #endif
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 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	322
1034 107b013e9d9d avoid some warnings Matt Johnston <matt@ucc.asn.au> parents: 1033 diff changeset	323 int rc;
107b013e9d9d avoid some warnings Matt Johnston <matt@ucc.asn.au> parents: 1033 diff changeset	324 #ifdef IPTOS_LOWDELAY
107b013e9d9d avoid some warnings Matt Johnston <matt@ucc.asn.au> parents: 1033 diff changeset	325 int iptos_val = 0;
107b013e9d9d avoid some warnings Matt Johnston <matt@ucc.asn.au> parents: 1033 diff changeset	326 #endif
107b013e9d9d avoid some warnings Matt Johnston <matt@ucc.asn.au> parents: 1033 diff changeset	327 #ifdef SO_PRIORITY
107b013e9d9d avoid some warnings Matt Johnston <matt@ucc.asn.au> parents: 1033 diff changeset	328 int so_prio_val = 0;
107b013e9d9d avoid some warnings Matt Johnston <matt@ucc.asn.au> parents: 1033 diff changeset	329 #endif
107b013e9d9d avoid some warnings Matt Johnston <matt@ucc.asn.au> parents: 1033 diff changeset	330
1032 0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	331
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	332 /* 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	333 * on a client '-J' proxy pipe */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	334
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	335 /* 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	336 #ifdef IPTOS_LOWDELAY
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	337 if (prio == DROPBEAR_PRIO_LOWDELAY) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	338 iptos_val = IPTOS_LOWDELAY;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	339 } else if (prio == DROPBEAR_PRIO_BULK) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	340 iptos_val = IPTOS_THROUGHPUT;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	341 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	342 #if defined(IPPROTO_IPV6) && defined(IPV6_TCLASS)
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	343 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	344 if (rc < 0 && errno != ENOTSOCK) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	345 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	346 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	347 #endif
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	348 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	349 if (rc < 0 && errno != ENOTSOCK) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	350 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	351 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	352 #endif
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 #ifdef SO_PRIORITY
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	355 if (prio == DROPBEAR_PRIO_LOWDELAY) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	356 so_prio_val = TC_PRIO_INTERACTIVE;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	357 } else if (prio == DROPBEAR_PRIO_BULK) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	358 so_prio_val = TC_PRIO_BULK;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	359 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	360 /* 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	361 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	362 if (rc < 0 && errno != ENOTSOCK)
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	363 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	364 strerror(errno));
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	365 #endif
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	366
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	367 }
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 /* Listen on address:port.
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	370 * 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	371 * 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	372 * 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	373 * 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	374 * string.*/
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	375 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	376 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	377
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	378 struct addrinfo hints, res = NULL, res0 = NULL;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	379 int err;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	380 unsigned int nsock;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	381 struct linger linger;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	382 int val;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	383 int sock;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	384
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	385 TRACE(("enter dropbear_listen"))
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 memset(&hints, 0, sizeof(hints));
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	388 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	389 hints.ai_socktype = SOCK_STREAM;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	390
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	391 /* for calling getaddrinfo:
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	392 address == NULL and !AI_PASSIVE: local loopback
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	393 address == NULL and AI_PASSIVE: all interfaces
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	394 address != NULL: whatever the address says */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	395 if (!address) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	396 TRACE(("dropbear_listen: local loopback"))
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	397 } else {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	398 if (address[0] == '\0') {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	399 TRACE(("dropbear_listen: all interfaces"))
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	400 address = NULL;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	401 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	402 hints.ai_flags = AI_PASSIVE;
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 err = getaddrinfo(address, port, &hints, &res0);
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 if (err) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	407 if (errstring != NULL && *errstring == NULL) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	408 int len;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	409 len = 20 + strlen(gai_strerror(err));
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	410 errstring = (char)m_malloc(len);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	411 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	412 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	413 if (res0) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	414 freeaddrinfo(res0);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	415 res0 = NULL;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	416 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	417 TRACE(("leave dropbear_listen: failed resolving"))
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	418 return -1;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	419 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	420
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 nsock = 0;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	423 for (res = res0; res != NULL && nsock < sockcount;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	424 res = res->ai_next) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	425
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	426 /* Get a socket */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	427 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	428 res->ai_protocol);
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 sock = socks[nsock]; /* For clarity */
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 if (sock < 0) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	433 err = errno;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	434 TRACE(("socket() failed"))
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	435 continue;
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 /* Various useful socket options */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	439 val = 1;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	440 /* set to reuse, quick timeout */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	441 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	442 linger.l_onoff = 1;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	443 linger.l_linger = 5;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	444 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	445
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	446 #if defined(IPPROTO_IPV6) && defined(IPV6_V6ONLY)
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	447 if (res->ai_family == AF_INET6) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	448 int on = 1;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	449 if (setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY,
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	450 &on, sizeof(on)) == -1) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	451 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	452 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	453 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	454 #endif
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 set_sock_nodelay(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 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	459 err = errno;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	460 close(sock);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	461 TRACE(("bind(%s) failed", port))
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	462 continue;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	463 }
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 if (listen(sock, DROPBEAR_LISTEN_BACKLOG) < 0) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	466 err = errno;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	467 close(sock);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	468 TRACE(("listen() failed"))
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	469 continue;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	470 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	471
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	472 maxfd = MAX(maxfd, sock);
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 nsock++;
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 if (res0) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	478 freeaddrinfo(res0);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	479 res0 = NULL;
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
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	482 if (nsock == 0) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	483 if (errstring != NULL && *errstring == NULL) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	484 int len;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	485 len = 20 + strlen(strerror(err));
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	486 errstring = (char)m_malloc(len);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	487 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	488 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	489 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	490 return -1;
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
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	493 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	494 return nsock;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	495 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	496
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	497 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	498 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	499 {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	500 struct sockaddr_storage addr;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	501 socklen_t addrlen;
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 if (local_host \|\| local_port) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	504 addrlen = sizeof(addr);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	505 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	506 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	507 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	508 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	509 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	510 if (remote_host \|\| remote_port) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	511 addrlen = sizeof(addr);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	512 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	513 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	514 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	515 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	516 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	517 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	518
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	519 /* 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	520 * value is allocated with malloc() */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	521 void getaddrstring(struct sockaddr_storage* addr,
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	522 char ret_host, char ret_port,
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	523 int host_lookup) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	524
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	525 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	526 unsigned int len;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	527 int ret;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	528
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	529 int flags = NI_NUMERICSERV \| NI_NUMERICHOST;
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 #ifndef DO_HOST_LOOKUP
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	532 host_lookup = 0;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	533 #endif
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	534
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	535 if (host_lookup) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	536 flags = NI_NUMERICSERV;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	537 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	538
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	539 len = sizeof(struct sockaddr_storage);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	540 /* 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	541 * 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	542 * 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	543 * but we'll ignore them */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	544 #ifdef HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	545 if (addr->ss_family == AF_INET) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	546 len = sizeof(struct sockaddr_in);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	547 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	548 #ifdef AF_INET6
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	549 if (addr->ss_family == AF_INET6) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	550 len = sizeof(struct sockaddr_in6);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	551 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	552 #endif
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	553 #endif
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 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	556 serv, sizeof(serv)-1, flags);
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 != 0) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	559 if (host_lookup) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	560 /* 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	561 * 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	562 * to exhibit that behaviour. */
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	563 getaddrstring(addr, ret_host, ret_port, 0);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	564 return;
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	565 } else {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	566 /* 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	567 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	568 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	569 }
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 if (ret_host) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	572 *ret_host = m_strdup(host);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	573 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	574 if (ret_port) {
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	575 *ret_port = m_strdup(serv);
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	576 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	577 }
0da8ba489c23 Move generic network routines to netio.c Matt Johnston <matt@ucc.asn.au> parents: diff changeset	578

Mercurial > dropbear

annotate netio.c @ 1060:4c733310c21d nocircbuffer