diff options
Diffstat (limited to 'src/core/client_config/resolvers')
| -rw-r--r-- | src/core/client_config/resolvers/dns_resolver.c | 246 | ||||
| -rw-r--r-- | src/core/client_config/resolvers/dns_resolver.h | 42 | ||||
| -rw-r--r-- | src/core/client_config/resolvers/unix_resolver_posix.c | 195 | ||||
| -rw-r--r-- | src/core/client_config/resolvers/unix_resolver_posix.h | 44 |
4 files changed, 527 insertions, 0 deletions
diff --git a/src/core/client_config/resolvers/dns_resolver.c b/src/core/client_config/resolvers/dns_resolver.c new file mode 100644 index 0000000000..ac401bc4d3 --- /dev/null +++ b/src/core/client_config/resolvers/dns_resolver.c @@ -0,0 +1,246 @@ +/* + * + * Copyright 2015, Google Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following disclaimer + * in the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Google Inc. nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#include "src/core/client_config/resolvers/dns_resolver.h" + +#include <string.h> + +#include <grpc/support/alloc.h> +#include <grpc/support/string_util.h> + +#include "src/core/client_config/lb_policies/pick_first.h" +#include "src/core/iomgr/resolve_address.h" +#include "src/core/support/string.h" + +typedef struct { + /** base class: must be first */ + grpc_resolver base; + /** refcount */ + gpr_refcount refs; + /** name to resolve */ + char *name; + /** default port to use */ + char *default_port; + /** subchannel factory */ + grpc_subchannel_factory *subchannel_factory; + /** load balancing policy factory */ + grpc_lb_policy *(*lb_policy_factory)(grpc_subchannel **subchannels, + size_t num_subchannels); + + /** mutex guarding the rest of the state */ + gpr_mu mu; + /** are we currently resolving? */ + int resolving; + /** which version of resolved_config have we published? */ + int published_version; + /** which version of resolved_config is current? */ + int resolved_version; + /** pending next completion, or NULL */ + grpc_iomgr_closure *next_completion; + /** target config address for next completion */ + grpc_client_config **target_config; + /** current (fully resolved) config */ + grpc_client_config *resolved_config; +} dns_resolver; + +static void dns_destroy(grpc_resolver *r); + +static void dns_start_resolving_locked(dns_resolver *r); +static void dns_maybe_finish_next_locked(dns_resolver *r); + +static void dns_shutdown(grpc_resolver *r); +static void dns_channel_saw_error(grpc_resolver *r, + struct sockaddr *failing_address, + int failing_address_len); +static void dns_next(grpc_resolver *r, grpc_client_config **target_config, + grpc_iomgr_closure *on_complete); + +static const grpc_resolver_vtable dns_resolver_vtable = { + dns_destroy, dns_shutdown, dns_channel_saw_error, dns_next}; + +static void dns_shutdown(grpc_resolver *resolver) { + dns_resolver *r = (dns_resolver *)resolver; + gpr_mu_lock(&r->mu); + if (r->next_completion != NULL) { + *r->target_config = NULL; + grpc_iomgr_add_callback(r->next_completion); + r->next_completion = NULL; + } + gpr_mu_unlock(&r->mu); +} + +static void dns_channel_saw_error(grpc_resolver *resolver, struct sockaddr *sa, + int len) { + dns_resolver *r = (dns_resolver *)resolver; + gpr_mu_lock(&r->mu); + if (!r->resolving) { + dns_start_resolving_locked(r); + } + gpr_mu_unlock(&r->mu); +} + +static void dns_next(grpc_resolver *resolver, + grpc_client_config **target_config, + grpc_iomgr_closure *on_complete) { + dns_resolver *r = (dns_resolver *)resolver; + gpr_mu_lock(&r->mu); + GPR_ASSERT(!r->next_completion); + r->next_completion = on_complete; + r->target_config = target_config; + if (r->resolved_version == 0 && !r->resolving) { + dns_start_resolving_locked(r); + } else { + dns_maybe_finish_next_locked(r); + } + gpr_mu_unlock(&r->mu); +} + +static void dns_on_resolved(void *arg, grpc_resolved_addresses *addresses) { + dns_resolver *r = arg; + grpc_client_config *config = NULL; + grpc_subchannel **subchannels; + grpc_subchannel_args args; + grpc_lb_policy *lb_policy; + size_t i; + if (addresses) { + config = grpc_client_config_create(); + subchannels = gpr_malloc(sizeof(grpc_subchannel *) * addresses->naddrs); + for (i = 0; i < addresses->naddrs; i++) { + memset(&args, 0, sizeof(args)); + args.addr = (struct sockaddr *)(addresses->addrs[i].addr); + args.addr_len = addresses->addrs[i].len; + subchannels[i] = grpc_subchannel_factory_create_subchannel( + r->subchannel_factory, &args); + } + lb_policy = r->lb_policy_factory(subchannels, addresses->naddrs); + grpc_client_config_set_lb_policy(config, lb_policy); + GRPC_LB_POLICY_UNREF(lb_policy, "construction"); + grpc_resolved_addresses_destroy(addresses); + gpr_free(subchannels); + } + gpr_mu_lock(&r->mu); + GPR_ASSERT(r->resolving); + r->resolving = 0; + if (r->resolved_config) { + grpc_client_config_unref(r->resolved_config); + } + r->resolved_config = config; + r->resolved_version++; + dns_maybe_finish_next_locked(r); + gpr_mu_unlock(&r->mu); + + GRPC_RESOLVER_UNREF(&r->base, "dns-resolving"); +} + +static void dns_start_resolving_locked(dns_resolver *r) { + GRPC_RESOLVER_REF(&r->base, "dns-resolving"); + GPR_ASSERT(!r->resolving); + r->resolving = 1; + grpc_resolve_address(r->name, r->default_port, dns_on_resolved, r); +} + +static void dns_maybe_finish_next_locked(dns_resolver *r) { + if (r->next_completion != NULL && + r->resolved_version != r->published_version) { + *r->target_config = r->resolved_config; + if (r->resolved_config) { + grpc_client_config_ref(r->resolved_config); + } + grpc_iomgr_add_callback(r->next_completion); + r->next_completion = NULL; + r->published_version = r->resolved_version; + } +} + +static void dns_destroy(grpc_resolver *gr) { + dns_resolver *r = (dns_resolver *)gr; + gpr_mu_destroy(&r->mu); + if (r->resolved_config) { + grpc_client_config_unref(r->resolved_config); + } + grpc_subchannel_factory_unref(r->subchannel_factory); + gpr_free(r->name); + gpr_free(r->default_port); + gpr_free(r); +} + +static grpc_resolver *dns_create( + grpc_uri *uri, const char *default_port, + grpc_lb_policy *(*lb_policy_factory)(grpc_subchannel **subchannels, + size_t num_subchannels), + grpc_subchannel_factory *subchannel_factory) { + dns_resolver *r; + const char *path = uri->path; + + if (0 != strcmp(uri->authority, "")) { + gpr_log(GPR_ERROR, "authority based uri's not supported"); + return NULL; + } + + if (path[0] == '/') ++path; + + r = gpr_malloc(sizeof(dns_resolver)); + memset(r, 0, sizeof(*r)); + gpr_ref_init(&r->refs, 1); + gpr_mu_init(&r->mu); + grpc_resolver_init(&r->base, &dns_resolver_vtable); + r->name = gpr_strdup(path); + r->default_port = gpr_strdup(default_port); + r->subchannel_factory = subchannel_factory; + r->lb_policy_factory = lb_policy_factory; + grpc_subchannel_factory_ref(subchannel_factory); + return &r->base; +} + +/* + * FACTORY + */ + +static void dns_factory_ref(grpc_resolver_factory *factory) {} + +static void dns_factory_unref(grpc_resolver_factory *factory) {} + +static grpc_resolver *dns_factory_create_resolver( + grpc_resolver_factory *factory, grpc_uri *uri, + grpc_subchannel_factory *subchannel_factory) { + return dns_create(uri, "https", grpc_create_pick_first_lb_policy, + subchannel_factory); +} + +static const grpc_resolver_factory_vtable dns_factory_vtable = { + dns_factory_ref, dns_factory_unref, dns_factory_create_resolver}; +static grpc_resolver_factory dns_resolver_factory = {&dns_factory_vtable}; + +grpc_resolver_factory *grpc_dns_resolver_factory_create() { + return &dns_resolver_factory; +} diff --git a/src/core/client_config/resolvers/dns_resolver.h b/src/core/client_config/resolvers/dns_resolver.h new file mode 100644 index 0000000000..09322b16cf --- /dev/null +++ b/src/core/client_config/resolvers/dns_resolver.h @@ -0,0 +1,42 @@ +/* + * + * Copyright 2015, Google Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following disclaimer + * in the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Google Inc. nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifndef GRPC_INTERNAL_CORE_CLIENT_CONFIG_RESOLVERS_DNS_RESOLVER_H +#define GRPC_INTERNAL_CORE_CLIENT_CONFIG_RESOLVERS_DNS_RESOLVER_H + +#include "src/core/client_config/resolver_factory.h" + +/** Create a dns resolver for \a name */ +grpc_resolver_factory *grpc_dns_resolver_factory_create(void); + +#endif /* GRPC_INTERNAL_CORE_CLIENT_CONFIG_RESOLVERS_DNS_RESOLVER_H */ diff --git a/src/core/client_config/resolvers/unix_resolver_posix.c b/src/core/client_config/resolvers/unix_resolver_posix.c new file mode 100644 index 0000000000..be515d2689 --- /dev/null +++ b/src/core/client_config/resolvers/unix_resolver_posix.c @@ -0,0 +1,195 @@ +/* + * + * Copyright 2015, Google Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following disclaimer + * in the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Google Inc. nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#include <grpc/support/port_platform.h> +#ifdef GPR_POSIX_SOCKET + +#include "src/core/client_config/resolvers/unix_resolver_posix.h" + +#include <string.h> +#include <sys/un.h> + +#include <grpc/support/alloc.h> +#include <grpc/support/string_util.h> + +#include "src/core/client_config/lb_policies/pick_first.h" +#include "src/core/iomgr/resolve_address.h" +#include "src/core/support/string.h" + +typedef struct { + /** base class: must be first */ + grpc_resolver base; + /** refcount */ + gpr_refcount refs; + /** subchannel factory */ + grpc_subchannel_factory *subchannel_factory; + /** load balancing policy factory */ + grpc_lb_policy *(*lb_policy_factory)(grpc_subchannel **subchannels, + size_t num_subchannels); + + /** the address that we've 'resolved' */ + struct sockaddr_un addr; + int addr_len; + + /** mutex guarding the rest of the state */ + gpr_mu mu; + /** have we published? */ + int published; + /** pending next completion, or NULL */ + grpc_iomgr_closure *next_completion; + /** target config address for next completion */ + grpc_client_config **target_config; +} unix_resolver; + +static void unix_destroy(grpc_resolver *r); + +static void unix_maybe_finish_next_locked(unix_resolver *r); + +static void unix_shutdown(grpc_resolver *r); +static void unix_channel_saw_error(grpc_resolver *r, + struct sockaddr *failing_address, + int failing_address_len); +static void unix_next(grpc_resolver *r, grpc_client_config **target_config, + grpc_iomgr_closure *on_complete); + +static const grpc_resolver_vtable unix_resolver_vtable = { + unix_destroy, unix_shutdown, unix_channel_saw_error, unix_next}; + +static void unix_shutdown(grpc_resolver *resolver) { + unix_resolver *r = (unix_resolver *)resolver; + gpr_mu_lock(&r->mu); + if (r->next_completion != NULL) { + *r->target_config = NULL; + /* TODO(ctiller): add delayed callback */ + grpc_iomgr_add_callback(r->next_completion); + r->next_completion = NULL; + } + gpr_mu_unlock(&r->mu); +} + +static void unix_channel_saw_error(grpc_resolver *resolver, struct sockaddr *sa, + int len) {} + +static void unix_next(grpc_resolver *resolver, + grpc_client_config **target_config, + grpc_iomgr_closure *on_complete) { + unix_resolver *r = (unix_resolver *)resolver; + gpr_mu_lock(&r->mu); + GPR_ASSERT(!r->next_completion); + r->next_completion = on_complete; + r->target_config = target_config; + unix_maybe_finish_next_locked(r); + gpr_mu_unlock(&r->mu); +} + +static void unix_maybe_finish_next_locked(unix_resolver *r) { + grpc_client_config *cfg; + grpc_lb_policy *lb_policy; + grpc_subchannel *subchannel; + grpc_subchannel_args args; + + if (r->next_completion != NULL && !r->published) { + cfg = grpc_client_config_create(); + memset(&args, 0, sizeof(args)); + args.addr = (struct sockaddr *)&r->addr; + args.addr_len = r->addr_len; + subchannel = + grpc_subchannel_factory_create_subchannel(r->subchannel_factory, &args); + lb_policy = r->lb_policy_factory(&subchannel, 1); + grpc_client_config_set_lb_policy(cfg, lb_policy); + GRPC_LB_POLICY_UNREF(lb_policy, "unix"); + r->published = 1; + *r->target_config = cfg; + grpc_iomgr_add_callback(r->next_completion); + r->next_completion = NULL; + } +} + +static void unix_destroy(grpc_resolver *gr) { + unix_resolver *r = (unix_resolver *)gr; + gpr_mu_destroy(&r->mu); + grpc_subchannel_factory_unref(r->subchannel_factory); + gpr_free(r); +} + +static grpc_resolver *unix_create( + grpc_uri *uri, + grpc_lb_policy *(*lb_policy_factory)(grpc_subchannel **subchannels, + size_t num_subchannels), + grpc_subchannel_factory *subchannel_factory) { + unix_resolver *r; + + if (0 != strcmp(uri->authority, "")) { + gpr_log(GPR_ERROR, "authority based uri's not supported"); + return NULL; + } + + r = gpr_malloc(sizeof(unix_resolver)); + memset(r, 0, sizeof(*r)); + gpr_ref_init(&r->refs, 1); + gpr_mu_init(&r->mu); + grpc_resolver_init(&r->base, &unix_resolver_vtable); + r->subchannel_factory = subchannel_factory; + r->lb_policy_factory = lb_policy_factory; + + r->addr.sun_family = AF_UNIX; + strcpy(r->addr.sun_path, uri->path); + r->addr_len = strlen(r->addr.sun_path) + sizeof(r->addr.sun_family) + 1; + + grpc_subchannel_factory_ref(subchannel_factory); + return &r->base; +} + +/* + * FACTORY + */ + +static void unix_factory_ref(grpc_resolver_factory *factory) {} + +static void unix_factory_unref(grpc_resolver_factory *factory) {} + +static grpc_resolver *unix_factory_create_resolver( + grpc_resolver_factory *factory, grpc_uri *uri, + grpc_subchannel_factory *subchannel_factory) { + return unix_create(uri, grpc_create_pick_first_lb_policy, subchannel_factory); +} + +static const grpc_resolver_factory_vtable unix_factory_vtable = { + unix_factory_ref, unix_factory_unref, unix_factory_create_resolver}; +static grpc_resolver_factory unix_resolver_factory = {&unix_factory_vtable}; + +grpc_resolver_factory *grpc_unix_resolver_factory_create() { + return &unix_resolver_factory; +} + +#endif diff --git a/src/core/client_config/resolvers/unix_resolver_posix.h b/src/core/client_config/resolvers/unix_resolver_posix.h new file mode 100644 index 0000000000..a84906f4d6 --- /dev/null +++ b/src/core/client_config/resolvers/unix_resolver_posix.h @@ -0,0 +1,44 @@ +/* + * + * Copyright 2015, Google Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following disclaimer + * in the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Google Inc. nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifndef GRPC_INTERNAL_CORE_CLIENT_CONFIG_RESOLVERS_UNIX_RESOLVER_H +#define GRPC_INTERNAL_CORE_CLIENT_CONFIG_RESOLVERS_UNIX_RESOLVER_H + +#include <grpc/support/port_platform.h> + +#include "src/core/client_config/resolver_factory.h" + +/** Create a dns resolver for \a name */ +grpc_resolver_factory *grpc_unix_resolver_factory_create(void); + +#endif /* GRPC_INTERNAL_CORE_CLIENT_CONFIG_RESOLVERS_UNIX_RESOLVER_H */ |