| /* |
| * |
| * Copyright 2014, 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 _POSIX_SOURCE |
| #define _POSIX_SOURCE |
| #endif |
| |
| #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/log.h> |
| #include <grpc/support/thd.h> |
| #include <grpc/support/time.h> |
| |
| typedef struct { |
| char *name; |
| char *default_port; |
| grpc_resolve_cb cb; |
| void *arg; |
| } request; |
| |
| static void split_host_port(const char *name, char **host, char **port) { |
| const char *host_start; |
| size_t host_len; |
| const char *port_start; |
| |
| *host = NULL; |
| *port = NULL; |
| |
| if (name[0] == '[') { |
| /* Parse a bracketed host, typically an IPv6 literal. */ |
| const char *rbracket = strchr(name, ']'); |
| if (rbracket == NULL) { |
| /* Unmatched [ */ |
| return; |
| } |
| if (rbracket[1] == '\0') { |
| /* ]<end> */ |
| port_start = NULL; |
| } else if (rbracket[1] == ':') { |
| /* ]:<port?> */ |
| port_start = rbracket + 2; |
| } else { |
| /* ]<invalid> */ |
| return; |
| } |
| host_start = name + 1; |
| host_len = rbracket - host_start; |
| if (memchr(host_start, ':', host_len) == NULL) { |
| /* Require all bracketed hosts to contain a colon, because a hostname or |
| IPv4 address should never use brackets. */ |
| return; |
| } |
| } else { |
| const char *colon = strchr(name, ':'); |
| if (colon != NULL && strchr(colon + 1, ':') == NULL) { |
| /* Exactly 1 colon. Split into host:port. */ |
| host_start = name; |
| host_len = colon - name; |
| port_start = colon + 1; |
| } else { |
| /* 0 or 2+ colons. Bare hostname or IPv6 litearal. */ |
| host_start = name; |
| host_len = strlen(name); |
| port_start = NULL; |
| } |
| } |
| |
| /* Allocate return values. */ |
| *host = gpr_malloc(host_len + 1); |
| memcpy(*host, host_start, host_len); |
| (*host)[host_len] = '\0'; |
| |
| if (port_start != NULL) { |
| *port = gpr_strdup(port_start); |
| } |
| } |
| |
| 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; |
| const gpr_timespec start_time = gpr_now(); |
| 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); |
| return addrs; |
| } |
| |
| /* parse name, splitting it into host and port parts */ |
| 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) { |
| 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++; |
| } |
| |
| /* Temporary logging, to help identify flakiness in dualstack_socket_test. */ |
| { |
| const gpr_timespec delay = gpr_time_sub(gpr_now(), start_time); |
| const int delay_ms = |
| delay.tv_sec * GPR_MS_PER_SEC + delay.tv_nsec / GPR_NS_PER_MS; |
| gpr_log(GPR_INFO, "logspam: getaddrinfo(%s, %s) resolved %d addrs in %dms:", |
| host, port, addrs->naddrs, delay_ms); |
| for (i = 0; i < addrs->naddrs; i++) { |
| char *buf; |
| grpc_sockaddr_to_string(&buf, (struct sockaddr *)&addrs->addrs[i].addr, |
| 0); |
| gpr_log(GPR_INFO, "logspam: [%d] %s", i, buf); |
| gpr_free(buf); |
| } |
| } |
| |
| 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(void *rp) { |
| request *r = rp; |
| 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); |
| gpr_free(r); |
| cb(arg, resolved); |
| grpc_iomgr_unref(); |
| } |
| |
| 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; |
| grpc_iomgr_ref(); |
| r->name = gpr_strdup(name); |
| r->default_port = gpr_strdup(default_port); |
| r->cb = cb; |
| r->arg = arg; |
| gpr_thd_new(&id, do_request, r, NULL); |
| } |