Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 1 | /* |
| 2 | * |
Craig Tiller | 0605995 | 2015-02-18 08:34:56 -0800 | [diff] [blame] | 3 | * Copyright 2015, Google Inc. |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 4 | * All rights reserved. |
| 5 | * |
| 6 | * Redistribution and use in source and binary forms, with or without |
| 7 | * modification, are permitted provided that the following conditions are |
| 8 | * met: |
| 9 | * |
| 10 | * * Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * * Redistributions in binary form must reproduce the above |
| 13 | * copyright notice, this list of conditions and the following disclaimer |
| 14 | * in the documentation and/or other materials provided with the |
| 15 | * distribution. |
| 16 | * * Neither the name of Google Inc. nor the names of its |
| 17 | * contributors may be used to endorse or promote products derived from |
| 18 | * this software without specific prior written permission. |
| 19 | * |
| 20 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 21 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 22 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 23 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 24 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 25 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 26 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 27 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 28 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 29 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 30 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 31 | * |
| 32 | */ |
| 33 | |
Nicolas "Pixel" Noble | d5a9985 | 2015-01-24 01:27:48 -0800 | [diff] [blame] | 34 | #include "src/core/iomgr/sockaddr.h" |
| 35 | |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 36 | #include <grpc/grpc.h> |
| 37 | |
| 38 | #include <stdlib.h> |
| 39 | #include <string.h> |
| 40 | |
| 41 | #include "src/core/channel/census_filter.h" |
| 42 | #include "src/core/channel/channel_args.h" |
| 43 | #include "src/core/channel/client_channel.h" |
| 44 | #include "src/core/channel/client_setup.h" |
| 45 | #include "src/core/channel/connected_channel.h" |
| 46 | #include "src/core/channel/http_client_filter.h" |
ctiller | 18b49ab | 2014-12-09 14:39:16 -0800 | [diff] [blame] | 47 | #include "src/core/iomgr/resolve_address.h" |
| 48 | #include "src/core/iomgr/tcp_client.h" |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 49 | #include "src/core/security/auth.h" |
Julien Boeuf | 7d1d9ca | 2015-04-17 14:38:48 -0700 | [diff] [blame] | 50 | #include "src/core/security/credentials.h" |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 51 | #include "src/core/security/secure_transport_setup.h" |
Craig Tiller | 485d776 | 2015-01-23 12:54:05 -0800 | [diff] [blame] | 52 | #include "src/core/support/string.h" |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 53 | #include "src/core/surface/channel.h" |
| 54 | #include "src/core/surface/client.h" |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 55 | #include "src/core/transport/chttp2_transport.h" |
| 56 | #include <grpc/grpc_security.h> |
| 57 | #include <grpc/support/alloc.h> |
| 58 | #include <grpc/support/log.h> |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 59 | #include <grpc/support/sync.h> |
| 60 | #include <grpc/support/useful.h> |
| 61 | #include "src/core/tsi/transport_security_interface.h" |
| 62 | |
| 63 | typedef struct setup setup; |
| 64 | |
| 65 | /* A single setup request (started via initiate) */ |
| 66 | typedef struct { |
| 67 | grpc_client_setup_request *cs_request; |
| 68 | setup *setup; |
| 69 | /* Resolved addresses, or null if resolution not yet completed. */ |
| 70 | grpc_resolved_addresses *resolved; |
| 71 | /* which address in resolved should we pick for the next connection attempt */ |
| 72 | size_t resolved_index; |
| 73 | } request; |
| 74 | |
| 75 | struct setup { |
Julien Boeuf | 7d1d9ca | 2015-04-17 14:38:48 -0700 | [diff] [blame] | 76 | grpc_channel_security_connector *security_connector; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 77 | const char *target; |
| 78 | grpc_transport_setup_callback setup_callback; |
| 79 | void *setup_user_data; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 80 | }; |
| 81 | |
| 82 | static int maybe_try_next_resolved(request *r); |
| 83 | |
| 84 | static void done(request *r, int was_successful) { |
| 85 | grpc_client_setup_request_finish(r->cs_request, was_successful); |
| 86 | if (r->resolved) { |
| 87 | grpc_resolved_addresses_destroy(r->resolved); |
| 88 | } |
| 89 | gpr_free(r); |
| 90 | } |
| 91 | |
| 92 | static void on_secure_transport_setup_done(void *rp, |
| 93 | grpc_security_status status, |
| 94 | grpc_endpoint *secure_endpoint) { |
| 95 | request *r = rp; |
| 96 | if (status != GRPC_SECURITY_OK) { |
| 97 | gpr_log(GPR_ERROR, "Secure transport setup failed with error %d.", status); |
| 98 | done(r, 0); |
Craig Tiller | 43a2b17 | 2015-02-18 17:17:51 -0800 | [diff] [blame] | 99 | } else if (grpc_client_setup_cb_begin(r->cs_request)) { |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 100 | grpc_create_chttp2_transport( |
| 101 | r->setup->setup_callback, r->setup->setup_user_data, |
| 102 | grpc_client_setup_get_channel_args(r->cs_request), secure_endpoint, |
| 103 | NULL, 0, grpc_client_setup_get_mdctx(r->cs_request), 1); |
Craig Tiller | 43a2b17 | 2015-02-18 17:17:51 -0800 | [diff] [blame] | 104 | grpc_client_setup_cb_end(r->cs_request); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 105 | done(r, 1); |
Craig Tiller | 43a2b17 | 2015-02-18 17:17:51 -0800 | [diff] [blame] | 106 | } else { |
| 107 | done(r, 0); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 108 | } |
| 109 | } |
| 110 | |
| 111 | /* connection callback: tcp is either valid, or null on error */ |
| 112 | static void on_connect(void *rp, grpc_endpoint *tcp) { |
| 113 | request *r = rp; |
| 114 | |
| 115 | if (!grpc_client_setup_request_should_continue(r->cs_request)) { |
| 116 | if (tcp) { |
| 117 | grpc_endpoint_shutdown(tcp); |
| 118 | grpc_endpoint_destroy(tcp); |
| 119 | } |
| 120 | done(r, 0); |
| 121 | return; |
| 122 | } |
| 123 | |
| 124 | if (!tcp) { |
| 125 | if (!maybe_try_next_resolved(r)) { |
| 126 | done(r, 0); |
| 127 | return; |
| 128 | } else { |
| 129 | return; |
| 130 | } |
| 131 | } else { |
Julien Boeuf | 7d1d9ca | 2015-04-17 14:38:48 -0700 | [diff] [blame] | 132 | grpc_setup_secure_transport(&r->setup->security_connector->base, tcp, |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 133 | on_secure_transport_setup_done, r); |
| 134 | } |
| 135 | } |
| 136 | |
| 137 | /* attempt to connect to the next available resolved address */ |
| 138 | static int maybe_try_next_resolved(request *r) { |
| 139 | grpc_resolved_address *addr; |
| 140 | if (!r->resolved) return 0; |
| 141 | if (r->resolved_index == r->resolved->naddrs) return 0; |
| 142 | addr = &r->resolved->addrs[r->resolved_index++]; |
ctiller | 18b49ab | 2014-12-09 14:39:16 -0800 | [diff] [blame] | 143 | grpc_tcp_client_connect(on_connect, r, (struct sockaddr *)&addr->addr, |
| 144 | addr->len, |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 145 | grpc_client_setup_request_deadline(r->cs_request)); |
| 146 | return 1; |
| 147 | } |
| 148 | |
| 149 | /* callback for when our target address has been resolved */ |
| 150 | static void on_resolved(void *rp, grpc_resolved_addresses *resolved) { |
| 151 | request *r = rp; |
| 152 | |
| 153 | /* if we're not still the active request, abort */ |
| 154 | if (!grpc_client_setup_request_should_continue(r->cs_request)) { |
| 155 | if (resolved) { |
| 156 | grpc_resolved_addresses_destroy(resolved); |
| 157 | } |
| 158 | done(r, 0); |
| 159 | return; |
| 160 | } |
| 161 | |
| 162 | if (!resolved) { |
| 163 | done(r, 0); |
| 164 | return; |
| 165 | } else { |
| 166 | r->resolved = resolved; |
| 167 | r->resolved_index = 0; |
| 168 | if (!maybe_try_next_resolved(r)) { |
| 169 | done(r, 0); |
| 170 | } |
| 171 | } |
| 172 | } |
| 173 | |
| 174 | static void initiate_setup(void *sp, grpc_client_setup_request *cs_request) { |
| 175 | request *r = gpr_malloc(sizeof(request)); |
| 176 | r->setup = sp; |
| 177 | r->cs_request = cs_request; |
| 178 | r->resolved = NULL; |
| 179 | r->resolved_index = 0; |
| 180 | /* TODO(klempner): Make grpc_resolve_address respect deadline */ |
| 181 | grpc_resolve_address(r->setup->target, "https", on_resolved, r); |
| 182 | } |
| 183 | |
| 184 | static void done_setup(void *sp) { |
| 185 | setup *s = sp; |
| 186 | gpr_free((void *)s->target); |
Julien Boeuf | 7d1d9ca | 2015-04-17 14:38:48 -0700 | [diff] [blame] | 187 | grpc_security_connector_unref(&s->security_connector->base); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 188 | gpr_free(s); |
| 189 | } |
| 190 | |
| 191 | static grpc_transport_setup_result complete_setup(void *channel_stack, |
| 192 | grpc_transport *transport, |
| 193 | grpc_mdctx *mdctx) { |
Julien Boeuf | 54b2192 | 2015-02-04 16:39:35 -0800 | [diff] [blame] | 194 | static grpc_channel_filter const *extra_filters[] = { |
Craig Tiller | 6e84aba | 2015-04-23 15:08:17 -0700 | [diff] [blame] | 195 | &grpc_client_auth_filter, &grpc_http_client_filter}; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 196 | return grpc_client_channel_transport_setup_complete( |
| 197 | channel_stack, transport, extra_filters, GPR_ARRAY_SIZE(extra_filters), |
| 198 | mdctx); |
| 199 | } |
| 200 | |
| 201 | /* Create a secure client channel: |
| 202 | Asynchronously: - resolve target |
| 203 | - connect to it (trying alternatives as presented) |
| 204 | - perform handshakes */ |
Julien Boeuf | 7d1d9ca | 2015-04-17 14:38:48 -0700 | [diff] [blame] | 205 | grpc_channel *grpc_secure_channel_create(grpc_credentials *creds, |
| 206 | const char *target, |
| 207 | const grpc_channel_args *args) { |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 208 | setup *s; |
| 209 | grpc_channel *channel; |
Julien Boeuf | 7d1d9ca | 2015-04-17 14:38:48 -0700 | [diff] [blame] | 210 | grpc_arg connector_arg; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 211 | grpc_channel_args *args_copy; |
Julien Boeuf | 7d1d9ca | 2015-04-17 14:38:48 -0700 | [diff] [blame] | 212 | grpc_channel_args *new_args_from_connector; |
Craig Tiller | 1a727fd | 2015-04-24 13:21:22 -0700 | [diff] [blame] | 213 | grpc_channel_security_connector *connector; |
Julien Boeuf | 7d1d9ca | 2015-04-17 14:38:48 -0700 | [diff] [blame] | 214 | grpc_mdctx *mdctx; |
Julien Boeuf | 54b2192 | 2015-02-04 16:39:35 -0800 | [diff] [blame] | 215 | #define MAX_FILTERS 3 |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 216 | const grpc_channel_filter *filters[MAX_FILTERS]; |
| 217 | int n = 0; |
Julien Boeuf | 7d1d9ca | 2015-04-17 14:38:48 -0700 | [diff] [blame] | 218 | |
| 219 | if (grpc_find_security_connector_in_args(args) != NULL) { |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 220 | gpr_log(GPR_ERROR, "Cannot set security context in channel args."); |
Julien Boeuf | 7d1d9ca | 2015-04-17 14:38:48 -0700 | [diff] [blame] | 221 | return grpc_lame_client_channel_create(); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 222 | } |
| 223 | |
Julien Boeuf | 7d1d9ca | 2015-04-17 14:38:48 -0700 | [diff] [blame] | 224 | if (grpc_credentials_create_security_connector( |
| 225 | creds, target, args, NULL, &connector, &new_args_from_connector) != |
| 226 | GRPC_SECURITY_OK) { |
| 227 | return grpc_lame_client_channel_create(); |
| 228 | } |
| 229 | mdctx = grpc_credentials_get_or_create_metadata_context(creds); |
| 230 | |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 231 | s = gpr_malloc(sizeof(setup)); |
Julien Boeuf | 7d1d9ca | 2015-04-17 14:38:48 -0700 | [diff] [blame] | 232 | connector_arg = grpc_security_connector_to_arg(&connector->base); |
| 233 | args_copy = grpc_channel_args_copy_and_add( |
| 234 | new_args_from_connector != NULL ? new_args_from_connector : args, |
| 235 | &connector_arg); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 236 | filters[n++] = &grpc_client_surface_filter; |
| 237 | if (grpc_channel_args_is_census_enabled(args)) { |
| 238 | filters[n++] = &grpc_client_census_filter; |
| 239 | } |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 240 | filters[n++] = &grpc_client_channel_filter; |
| 241 | GPR_ASSERT(n <= MAX_FILTERS); |
| 242 | channel = grpc_channel_create_from_filters(filters, n, args_copy, mdctx, 1); |
| 243 | grpc_channel_args_destroy(args_copy); |
Julien Boeuf | 7d1d9ca | 2015-04-17 14:38:48 -0700 | [diff] [blame] | 244 | if (new_args_from_connector != NULL) { |
| 245 | grpc_channel_args_destroy(new_args_from_connector); |
| 246 | } |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 247 | |
| 248 | s->target = gpr_strdup(target); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 249 | s->setup_callback = complete_setup; |
| 250 | s->setup_user_data = grpc_channel_get_channel_stack(channel); |
Julien Boeuf | 7d1d9ca | 2015-04-17 14:38:48 -0700 | [diff] [blame] | 251 | s->security_connector = connector; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 252 | grpc_client_setup_create_and_attach(grpc_channel_get_channel_stack(channel), |
| 253 | args, mdctx, initiate_setup, done_setup, |
ctiller | 18b49ab | 2014-12-09 14:39:16 -0800 | [diff] [blame] | 254 | s); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 255 | return channel; |
Craig Tiller | 190d360 | 2015-02-18 09:23:38 -0800 | [diff] [blame] | 256 | } |