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/*
*
* 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/iomgr/sockaddr.h"
#include "src/core/iomgr/resolve_address.h"
#include <sys/types.h>
#include <sys/un.h>
#include <string.h>
#include "src/core/iomgr/iomgr_internal.h"
#include "src/core/iomgr/sockaddr_utils.h"
#include "src/core/support/string.h"
#include <grpc/support/alloc.h>
#include <grpc/support/host_port.h>
#include <grpc/support/log.h>
#include <grpc/support/string_util.h>
#include <grpc/support/thd.h>
#include <grpc/support/time.h>
#include <grpc/support/useful.h>
typedef struct {
char *name;
char *default_port;
grpc_resolve_cb cb;
void *arg;
grpc_iomgr_object iomgr_object;
} request;
grpc_resolved_addresses *grpc_blocking_resolve_address(
const char *name, const char *default_port) {
struct addrinfo hints;
struct addrinfo *result = NULL, *resp;
char *host;
char *port;
int s;
size_t i;
grpc_resolved_addresses *addrs = NULL;
struct sockaddr_un *un;
if (name[0] == 'u' && name[1] == 'n' && name[2] == 'i' && name[3] == 'x' &&
name[4] == ':' && name[5] != 0) {
addrs = gpr_malloc(sizeof(grpc_resolved_addresses));
addrs->naddrs = 1;
addrs->addrs = gpr_malloc(sizeof(grpc_resolved_address));
un = (struct sockaddr_un *)addrs->addrs->addr;
un->sun_family = AF_UNIX;
strcpy(un->sun_path, name + 5);
addrs->addrs->len = strlen(un->sun_path) + sizeof(un->sun_family) + 1;
return addrs;
}
/* parse name, splitting it into host and port parts */
gpr_split_host_port(name, &host, &port);
if (host == NULL) {
gpr_log(GPR_ERROR, "unparseable host:port: '%s'", name);
goto done;
}
if (port == NULL) {
if (default_port == NULL) {
gpr_log(GPR_ERROR, "no port in name '%s'", name);
goto done;
}
port = gpr_strdup(default_port);
}
/* Call getaddrinfo */
memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_UNSPEC; /* ipv4 or ipv6 */
hints.ai_socktype = SOCK_STREAM; /* stream socket */
hints.ai_flags = AI_PASSIVE; /* for wildcard IP address */
s = getaddrinfo(host, port, &hints, &result);
if (s != 0) {
/* Retry if well-known service name is recognized */
char *svc[][2] = {{"http", "80"}, {"https", "443"}};
for (i = 0; i < GPR_ARRAY_SIZE(svc); i++) {
if (strcmp(port, svc[i][0]) == 0) {
s = getaddrinfo(host, svc[i][1], &hints, &result);
break;
}
}
}
if (s != 0) {
gpr_log(GPR_ERROR, "getaddrinfo: %s", gai_strerror(s));
goto done;
}
/* Success path: set addrs non-NULL, fill it in */
addrs = gpr_malloc(sizeof(grpc_resolved_addresses));
addrs->naddrs = 0;
for (resp = result; resp != NULL; resp = resp->ai_next) {
addrs->naddrs++;
}
addrs->addrs = gpr_malloc(sizeof(grpc_resolved_address) * addrs->naddrs);
i = 0;
for (resp = result; resp != NULL; resp = resp->ai_next) {
memcpy(&addrs->addrs[i].addr, resp->ai_addr, resp->ai_addrlen);
addrs->addrs[i].len = resp->ai_addrlen;
i++;
}
done:
gpr_free(host);
gpr_free(port);
if (result) {
freeaddrinfo(result);
}
return addrs;
}
/* Thread function to asynch-ify grpc_blocking_resolve_address */
static void do_request_thread(void *rp) {
request *r = rp;
grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
grpc_resolved_addresses *resolved =
grpc_blocking_resolve_address(r->name, r->default_port);
void *arg = r->arg;
grpc_resolve_cb cb = r->cb;
gpr_free(r->name);
gpr_free(r->default_port);
cb(&exec_ctx, arg, resolved);
grpc_iomgr_unregister_object(&r->iomgr_object);
gpr_free(r);
grpc_exec_ctx_finish(&exec_ctx);
}
void grpc_resolved_addresses_destroy(grpc_resolved_addresses *addrs) {
gpr_free(addrs->addrs);
gpr_free(addrs);
}
void grpc_resolve_address(const char *name, const char *default_port,
grpc_resolve_cb cb, void *arg) {
request *r = gpr_malloc(sizeof(request));
gpr_thd_id id;
char *tmp;
gpr_asprintf(&tmp, "resolve_address:name='%s':default_port='%s'", name,
default_port);
grpc_iomgr_register_object(&r->iomgr_object, tmp);
gpr_free(tmp);
r->name = gpr_strdup(name);
r->default_port = gpr_strdup(default_port);
r->cb = cb;
r->arg = arg;
gpr_thd_new(&id, do_request_thread, r, NULL);
}
#endif
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