aboutsummaryrefslogtreecommitdiffhomepage
path: root/src/core/ext/filters/client_channel/parse_address.c
blob: 18381eec552e5a72a05ffd884870d44fd3b79f2b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
/*
 *
 * Copyright 2016, 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/ext/filters/client_channel/parse_address.h"
#include "src/core/lib/iomgr/sockaddr.h"

#include <stdio.h>
#include <string.h>
#ifdef GRPC_HAVE_UNIX_SOCKET
#include <sys/un.h>
#endif

#include <grpc/support/alloc.h>
#include <grpc/support/host_port.h>
#include <grpc/support/log.h>
#include <grpc/support/string_util.h>
#include "src/core/lib/support/string.h"

#ifdef GRPC_HAVE_UNIX_SOCKET

bool grpc_parse_unix(const grpc_uri *uri,
                     grpc_resolved_address *resolved_addr) {
  if (strcmp("unix", uri->scheme) != 0) {
    gpr_log(GPR_ERROR, "Expected 'unix' scheme, got '%s'", uri->scheme);
    return false;
  }
  struct sockaddr_un *un = (struct sockaddr_un *)resolved_addr->addr;
  const size_t maxlen = sizeof(un->sun_path);
  const size_t path_len = strnlen(uri->path, maxlen);
  if (path_len == maxlen) return false;
  un->sun_family = AF_UNIX;
  strcpy(un->sun_path, uri->path);
  resolved_addr->len = sizeof(*un);
  return true;
}

#else /* GRPC_HAVE_UNIX_SOCKET */

bool grpc_parse_unix(const grpc_uri *uri,
                     grpc_resolved_address *resolved_addr) {
  abort();
}

#endif /* GRPC_HAVE_UNIX_SOCKET */

bool grpc_parse_ipv4_hostport(const char *hostport, grpc_resolved_address *addr,
                              bool log_errors) {
  bool success = false;
  // Split host and port.
  char *host;
  char *port;
  if (!gpr_split_host_port(hostport, &host, &port)) return false;
  // Parse IP address.
  memset(addr, 0, sizeof(*addr));
  addr->len = sizeof(struct sockaddr_in);
  struct sockaddr_in *in = (struct sockaddr_in *)addr->addr;
  in->sin_family = AF_INET;
  if (inet_pton(AF_INET, host, &in->sin_addr) == 0) {
    if (log_errors) gpr_log(GPR_ERROR, "invalid ipv4 address: '%s'", host);
    goto done;
  }
  // Parse port.
  if (port == NULL) {
    if (log_errors) gpr_log(GPR_ERROR, "no port given for ipv4 scheme");
    goto done;
  }
  int port_num;
  if (sscanf(port, "%d", &port_num) != 1 || port_num < 0 || port_num > 65535) {
    if (log_errors) gpr_log(GPR_ERROR, "invalid ipv4 port: '%s'", port);
    goto done;
  }
  in->sin_port = htons((uint16_t)port_num);
  success = true;
done:
  gpr_free(host);
  gpr_free(port);
  return success;
}

bool grpc_parse_ipv4(const grpc_uri *uri,
                     grpc_resolved_address *resolved_addr) {
  if (strcmp("ipv4", uri->scheme) != 0) {
    gpr_log(GPR_ERROR, "Expected 'ipv4' scheme, got '%s'", uri->scheme);
    return false;
  }
  const char *host_port = uri->path;
  if (*host_port == '/') ++host_port;
  return grpc_parse_ipv4_hostport(host_port, resolved_addr,
                                  true /* log_errors */);
}

bool grpc_parse_ipv6_hostport(const char *hostport, grpc_resolved_address *addr,
                              bool log_errors) {
  bool success = false;
  // Split host and port.
  char *host;
  char *port;
  if (!gpr_split_host_port(hostport, &host, &port)) return false;
  // Parse IP address.
  memset(addr, 0, sizeof(*addr));
  addr->len = sizeof(struct sockaddr_in6);
  struct sockaddr_in6 *in6 = (struct sockaddr_in6 *)addr->addr;
  in6->sin6_family = AF_INET6;
  // Handle the RFC6874 syntax for IPv6 zone identifiers.
  char *host_end = (char *)gpr_memrchr(host, '%', strlen(host));
  if (host_end != NULL) {
    GPR_ASSERT(host_end >= host);
    char host_without_scope[INET6_ADDRSTRLEN];
    size_t host_without_scope_len = (size_t)(host_end - host);
    uint32_t sin6_scope_id = 0;
    strncpy(host_without_scope, host, host_without_scope_len);
    host_without_scope[host_without_scope_len] = '\0';
    if (inet_pton(AF_INET6, host_without_scope, &in6->sin6_addr) == 0) {
      gpr_log(GPR_ERROR, "invalid ipv6 address: '%s'", host_without_scope);
      goto done;
    }
    if (gpr_parse_bytes_to_uint32(host_end + 1,
                                  strlen(host) - host_without_scope_len - 1,
                                  &sin6_scope_id) == 0) {
      gpr_log(GPR_ERROR, "invalid ipv6 scope id: '%s'", host_end + 1);
      goto done;
    }
    // Handle "sin6_scope_id" being type "u_long". See grpc issue #10027.
    in6->sin6_scope_id = sin6_scope_id;
  } else {
    if (inet_pton(AF_INET6, host, &in6->sin6_addr) == 0) {
      gpr_log(GPR_ERROR, "invalid ipv6 address: '%s'", host);
      goto done;
    }
  }
  // Parse port.
  if (port == NULL) {
    if (log_errors) gpr_log(GPR_ERROR, "no port given for ipv6 scheme");
    goto done;
  }
  int port_num;
  if (sscanf(port, "%d", &port_num) != 1 || port_num < 0 || port_num > 65535) {
    if (log_errors) gpr_log(GPR_ERROR, "invalid ipv6 port: '%s'", port);
    goto done;
  }
  in6->sin6_port = htons((uint16_t)port_num);
  success = true;
done:
  gpr_free(host);
  gpr_free(port);
  return success;
}

bool grpc_parse_ipv6(const grpc_uri *uri,
                     grpc_resolved_address *resolved_addr) {
  if (strcmp("ipv6", uri->scheme) != 0) {
    gpr_log(GPR_ERROR, "Expected 'ipv6' scheme, got '%s'", uri->scheme);
    return false;
  }
  const char *host_port = uri->path;
  if (*host_port == '/') ++host_port;
  return grpc_parse_ipv6_hostport(host_port, resolved_addr,
                                  true /* log_errors */);
}

bool grpc_parse_uri(const grpc_uri *uri, grpc_resolved_address *resolved_addr) {
  if (strcmp("unix", uri->scheme) == 0) {
    return grpc_parse_unix(uri, resolved_addr);
  } else if (strcmp("ipv4", uri->scheme) == 0) {
    return grpc_parse_ipv4(uri, resolved_addr);
  } else if (strcmp("ipv6", uri->scheme) == 0) {
    return grpc_parse_ipv6(uri, resolved_addr);
  }
  gpr_log(GPR_ERROR, "Can't parse scheme '%s'", uri->scheme);
  return false;
}