upstream: convert channels.c to new packet API

with & ok markus@

OpenBSD-Commit-ID: 0b8279b56113cbd4011fc91315c0796b63dc862c

diff --git a/channels.c b/channels.c
index dcda44b07970ac755b9cf8d31dde14abf6160d73..19da16eb3706117ae006eb3093bd794e9c63d846 100644 (file)
--- a/channels.c
+++ b/channels.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: channels.c,v 1.388 2019/01/19 21:31:32 djm Exp $ */
+/* $OpenBSD: channels.c,v 1.389 2019/01/19 21:37:13 djm Exp $ */
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -84,9 +84,6 @@
 #include "pathnames.h"
 #include "match.h"
 
-#include "opacket.h" /* XXX */
-extern struct ssh *active_state; /* XXX */
-
 /* -- agent forwarding */
 #define        NUM_SOCKS       10
 
@@ -2994,10 +2991,10 @@ channel_input_data(int type, u_int32_t seq, struct ssh *ssh)
                return 0;
 
        /* Get the data. */
-       if ((r = sshpkt_get_string_direct(ssh, &data, &data_len)) != 0)
+       if ((r = sshpkt_get_string_direct(ssh, &data, &data_len)) != 0 ||
+            (r = sshpkt_get_end(ssh)) != 0)
                fatal("%s: channel %d: get data: %s", __func__,
                    c->self, ssh_err(r));
-       ssh_packet_check_eom(ssh);
 
        win_len = data_len;
        if (c->datagram)
@@ -3071,11 +3068,11 @@ channel_input_extended_data(int type, u_int32_t seq, struct ssh *ssh)
                logit("channel %d: bad ext data", c->self);
                return 0;
        }
-       if ((r = sshpkt_get_string_direct(ssh, &data, &data_len)) != 0) {
+       if ((r = sshpkt_get_string_direct(ssh, &data, &data_len)) != 0 ||
+            (r = sshpkt_get_end(ssh)) != 0) {
                error("%s: parse data: %s", __func__, ssh_err(r));
                ssh_packet_disconnect(ssh, "Invalid extended_data message");
        }
-       ssh_packet_check_eom(ssh);
 
        if (data_len > c->local_window) {
                logit("channel %d: rcvd too much extended_data %zu, win %u",
@@ -3094,8 +3091,12 @@ int
 channel_input_ieof(int type, u_int32_t seq, struct ssh *ssh)
 {
        Channel *c = channel_from_packet_id(ssh, __func__, "ieof");
+       int r;
 
-       ssh_packet_check_eom(ssh);
+        if ((r = sshpkt_get_end(ssh)) != 0) {
+               error("%s: parse data: %s", __func__, ssh_err(r));
+               ssh_packet_disconnect(ssh, "Invalid ieof message");
+       }
 
        if (channel_proxy_upstream(c, type, seq, ssh))
                return 0;
@@ -3115,10 +3116,14 @@ int
 channel_input_oclose(int type, u_int32_t seq, struct ssh *ssh)
 {
        Channel *c = channel_from_packet_id(ssh, __func__, "oclose");
+       int r;
 
        if (channel_proxy_upstream(c, type, seq, ssh))
                return 0;
-       ssh_packet_check_eom(ssh);
+        if ((r = sshpkt_get_end(ssh)) != 0) {
+               error("%s: parse data: %s", __func__, ssh_err(r));
+               ssh_packet_disconnect(ssh, "Invalid oclose message");
+       }
        chan_rcvd_oclose(ssh, c);
        return 0;
 }
@@ -3133,7 +3138,7 @@ channel_input_open_confirmation(int type, u_int32_t seq, struct ssh *ssh)
        if (channel_proxy_upstream(c, type, seq, ssh))
                return 0;
        if (c->type != SSH_CHANNEL_OPENING)
-               packet_disconnect("Received open confirmation for "
+               ssh_packet_disconnect(ssh, "Received open confirmation for "
                    "non-opening channel %d.", c->self);
        /*
         * Record the remote channel number and mark that the channel
@@ -3141,11 +3146,11 @@ channel_input_open_confirmation(int type, u_int32_t seq, struct ssh *ssh)
         */
        if ((r = sshpkt_get_u32(ssh, &c->remote_id)) != 0 ||
            (r = sshpkt_get_u32(ssh, &remote_window)) != 0 ||
-           (r = sshpkt_get_u32(ssh, &remote_maxpacket)) != 0) {
+           (r = sshpkt_get_u32(ssh, &remote_maxpacket)) != 0 ||
+            (r = sshpkt_get_end(ssh)) != 0) {
                error("%s: window/maxpacket: %s", __func__, ssh_err(r));
-               packet_disconnect("Invalid open confirmation message");
+               ssh_packet_disconnect(ssh, "Invalid open confirmation message");
        }
-       ssh_packet_check_eom(ssh);
 
        c->have_remote_id = 1;
        c->remote_window = remote_window;
@@ -3188,19 +3193,19 @@ channel_input_open_failure(int type, u_int32_t seq, struct ssh *ssh)
        if (channel_proxy_upstream(c, type, seq, ssh))
                return 0;
        if (c->type != SSH_CHANNEL_OPENING)
-               packet_disconnect("Received open failure for "
+               ssh_packet_disconnect(ssh, "Received open failure for "
                    "non-opening channel %d.", c->self);
        if ((r = sshpkt_get_u32(ssh, &reason)) != 0) {
                error("%s: reason: %s", __func__, ssh_err(r));
-               packet_disconnect("Invalid open failure message");
+               ssh_packet_disconnect(ssh, "Invalid open failure message");
        }
        /* skip language */
        if ((r = sshpkt_get_cstring(ssh, &msg, NULL)) != 0 ||
-           (r = sshpkt_get_string_direct(ssh, NULL, NULL)) != 0) {
+           (r = sshpkt_get_string_direct(ssh, NULL, NULL)) != 0 ||
+            (r = sshpkt_get_end(ssh)) != 0) {
                error("%s: message/lang: %s", __func__, ssh_err(r));
-               packet_disconnect("Invalid open failure message");
+               ssh_packet_disconnect(ssh, "Invalid open failure message");
        }
-       ssh_packet_check_eom(ssh);
        logit("channel %d: open failed: %s%s%s", c->self,
            reason2txt(reason), msg ? ": ": "", msg ? msg : "");
        free(msg);
@@ -3230,11 +3235,11 @@ channel_input_window_adjust(int type, u_int32_t seq, struct ssh *ssh)
 
        if (channel_proxy_upstream(c, type, seq, ssh))
                return 0;
-       if ((r = sshpkt_get_u32(ssh, &adjust)) != 0) {
+       if ((r = sshpkt_get_u32(ssh, &adjust)) != 0 ||
+            (r = sshpkt_get_end(ssh)) != 0) {
                error("%s: adjust: %s", __func__, ssh_err(r));
-               packet_disconnect("Invalid window adjust message");
+               ssh_packet_disconnect(ssh, "Invalid window adjust message");
        }
-       ssh_packet_check_eom(ssh);
        debug2("channel %d: rcvd adjust %u", c->self, adjust);
        if ((new_rwin = c->remote_window + adjust) < c->remote_window) {
                fatal("channel %d: adjust %u overflows remote window %u",
@@ -3250,9 +3255,10 @@ channel_input_status_confirm(int type, u_int32_t seq, struct ssh *ssh)
        int id = channel_parse_id(ssh, __func__, "status confirm");
        Channel *c;
        struct channel_confirm *cc;
+       int r;
 
        /* Reset keepalive timeout */
-       packet_set_alive_timeouts(0);
+       ssh_packet_set_alive_timeouts(ssh, 0);
 
        debug2("%s: type %d id %d", __func__, type, id);
 
@@ -3262,7 +3268,8 @@ channel_input_status_confirm(int type, u_int32_t seq, struct ssh *ssh)
        }
        if (channel_proxy_upstream(c, type, seq, ssh))
                return 0;
-       ssh_packet_check_eom(ssh);
+        if ((r = sshpkt_get_end(ssh)) != 0)
+               ssh_packet_disconnect(ssh, "Invalid status confirm message");
        if ((cc = TAILQ_FIRST(&c->status_confirms)) == NULL)
                return 0;
        cc->cb(ssh, type, c, cc->ctx);
@@ -3297,7 +3304,7 @@ channel_set_af(struct ssh *ssh, int af)
  * "127.0.0.1" / "::1"     -> accepted even if gateway_ports isn't set
  */
 static const char *
-channel_fwd_bind_addr(const char *listen_addr, int *wildcardp,
+channel_fwd_bind_addr(struct ssh *ssh, const char *listen_addr, int *wildcardp,
     int is_client, struct ForwardOptions *fwd_opts)
 {
        const char *addr = NULL;
@@ -3320,7 +3327,8 @@ channel_fwd_bind_addr(const char *listen_addr, int *wildcardp,
                        if (*listen_addr != '\0' &&
                            strcmp(listen_addr, "0.0.0.0") != 0 &&
                            strcmp(listen_addr, "*") != 0) {
-                               packet_send_debug("Forwarding listen address "
+                               ssh_packet_send_debug(ssh,
+                                   "Forwarding listen address "
                                    "\"%s\" overridden by server "
                                    "GatewayPorts", listen_addr);
                        }
@@ -3374,7 +3382,7 @@ channel_setup_fwd_listener_tcpip(struct ssh *ssh, int type,
        }
 
        /* Determine the bind address, cf. channel_fwd_bind_addr() comment */
-       addr = channel_fwd_bind_addr(fwd->listen_host, &wildcard,
+       addr = channel_fwd_bind_addr(ssh, fwd->listen_host, &wildcard,
            is_client, fwd_opts);
        debug3("%s: type %d wildcard %d addr %s", __func__,
            type, wildcard, (addr == NULL) ? "NULL" : addr);
@@ -3391,7 +3399,7 @@ channel_setup_fwd_listener_tcpip(struct ssh *ssh, int type,
        if ((r = getaddrinfo(addr, strport, &hints, &aitop)) != 0) {
                if (addr == NULL) {
                        /* This really shouldn't happen */
-                       packet_disconnect("getaddrinfo: fatal error: %s",
+                       ssh_packet_disconnect(ssh, "getaddrinfo: fatal error: %s",
                            ssh_gai_strerror(r));
                } else {
                        error("%s: getaddrinfo(%.64s): %s", __func__, addr,
@@ -3640,7 +3648,7 @@ channel_cancel_lport_listener_tcpip(struct ssh *ssh,
 {
        u_int i;
        int found = 0;
-       const char *addr = channel_fwd_bind_addr(lhost, NULL, 1, fwd_opts);
+       const char *addr = channel_fwd_bind_addr(ssh, lhost, NULL, 1, fwd_opts);
 
        for (i = 0; i < ssh->chanctxt->channels_alloc; i++) {
                Channel *c = ssh->chanctxt->channels[i];
@@ -3792,7 +3800,7 @@ channel_setup_remote_fwd_listener(struct ssh *ssh, struct Forward *fwd,
     int *allocated_listen_port, struct ForwardOptions *fwd_opts)
 {
        if (!check_rfwd_permission(ssh, fwd)) {
-               packet_send_debug("port forwarding refused");
+               ssh_packet_send_debug(ssh, "port forwarding refused");
                return 0;
        }
        if (fwd->listen_path != NULL) {