2 * Copyright (C) 2012 - David Goulet <dgoulet@efficios.com>
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License, version 2 only, as
6 * published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * You should have received a copy of the GNU General Public License along with
14 * this program; if not, write to the Free Software Foundation, Inc., 51
15 * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
20 #include <arpa/inet.h>
24 #include <sys/socket.h>
26 #include <common/common.h>
27 #include <common/defaults.h>
28 #include <common/utils.h>
33 P_NET
, P_NET6
, P_FILE
, P_TCP
, P_TCP6
,
38 const char *leading_string
;
39 enum uri_proto_code code
;
40 enum lttng_proto_type type
;
41 enum lttng_dst_type dtype
;
44 /* Supported protocols */
45 static const struct uri_proto proto_uri
[] = {
46 { .name
= "file", .leading_string
= "file://", .code
= P_FILE
, .type
= 0, .dtype
= LTTNG_DST_PATH
},
47 { .name
= "net", .leading_string
= "net://", .code
= P_NET
, .type
= LTTNG_TCP
, .dtype
= LTTNG_DST_IPV4
},
48 { .name
= "net6", .leading_string
= "net6://", .code
= P_NET6
, .type
= LTTNG_TCP
, .dtype
= LTTNG_DST_IPV6
},
49 { .name
= "tcp", .leading_string
= "tcp://", .code
= P_TCP
, .type
= LTTNG_TCP
, .dtype
= LTTNG_DST_IPV4
},
50 { .name
= "tcp6", .leading_string
= "tcp6://", .code
= P_TCP6
, .type
= LTTNG_TCP
, .dtype
= LTTNG_DST_IPV6
},
51 /* Invalid proto marking the end of the array. */
52 { NULL
, NULL
, 0, 0, 0 }
56 * Return pointer to the character in s matching one of the characters in
57 * accept. If nothing is found, return pointer to the end of string (eos).
59 const inline char *strpbrk_or_eos(const char *s
, const char *accept
)
61 char *p
= strpbrk(s
, accept
);
71 * Validate if proto is a supported protocol from proto_uri array.
73 static const struct uri_proto
*get_uri_proto(const char *uri_str
)
75 const struct uri_proto
*supported
= NULL
;
78 if (uri_str
== NULL
) {
82 for (supported
= &proto_uri
[0];
83 supported
->leading_string
!= NULL
; ++supported
) {
84 if (strncasecmp(uri_str
, supported
->leading_string
,
85 strlen(supported
->leading_string
)) == 0) {
98 * Set network address from string into dst. Supports both IP string and
101 static int set_ip_address(const char *addr
, int af
, char *dst
, size_t size
)
104 unsigned char buf
[sizeof(struct in6_addr
)];
105 struct hostent
*record
;
110 memset(dst
, 0, size
);
112 /* Network protocol */
113 ret
= inet_pton(af
, addr
, buf
);
115 /* We consider the dst to be an hostname or an invalid IP char */
116 record
= gethostbyname2(addr
, af
);
117 if (record
== NULL
) {
118 /* At this point, the IP or the hostname is bad */
119 ERR("URI parse bad hostname %s for af %d", addr
, af
);
123 /* Translate IP to string */
124 (void) inet_ntop(af
, record
->h_addr_list
[0], dst
, size
);
127 strncpy(dst
, addr
, size
);
128 dst
[size
- 1] = '\0';
132 DBG2("IP address resolved to %s", dst
);
143 * Return 0 if equal else 1.
145 int uri_compare(struct lttng_uri
*uri1
, struct lttng_uri
*uri2
)
147 return memcmp(uri1
, uri2
, sizeof(struct lttng_uri
));
153 void uri_free(struct lttng_uri
*uri
)
162 * Return an allocated URI.
164 struct lttng_uri
*uri_create(void)
166 struct lttng_uri
*uri
;
168 uri
= zmalloc(sizeof(struct lttng_uri
));
170 PERROR("zmalloc uri");
177 * Parses a string URI to a lttng_uri. This function can potentially return
178 * more than one URI in uris so the size of the array is returned and uris is
179 * allocated and populated. Caller must free(3) the array.
181 * This function can not detect the stream type of the URI so the caller has to
182 * make sure the correct type (stype) is set on the return URI(s). The default
183 * port must also be set by the caller if the returned URI has its port set to
186 * NOTE: A good part of the following code was inspired from the "wget" source
187 * tree from the src/url.c file and url_parse() function. Also, the
188 * strpbrk_or_eos() function found above is also inspired by the same code.
189 * This code was originally licensed GPLv2 so we acknolwedge the Free Software
190 * Foundation here for the work and to make sure we are compliant with it.
192 ssize_t
uri_parse(const char *str_uri
, struct lttng_uri
**uris
)
195 /* Size of the uris array. Default is 1 */
197 char subdir
[PATH_MAX
];
198 unsigned int ctrl_port
= 0;
199 unsigned int data_port
= 0;
200 struct lttng_uri
*tmp_uris
;
202 const struct uri_proto
*proto
;
203 const char *purl
, *addr_e
, *addr_b
, *subdir_b
= NULL
;
204 const char *seps
= ":/\0";
207 * The first part is the protocol portion of a maximum of 5 bytes for now.
208 * The second part is the hostname or IP address. The 255 bytes size is the
209 * limit found in the RFC 1035 for the total length of a domain name
210 * (https://www.ietf.org/rfc/rfc1035.txt). Finally, for the net://
211 * protocol, two ports CAN be specified.
214 DBG3("URI string: %s", str_uri
);
216 proto
= get_uri_proto(str_uri
);
218 ERR("URI parse unknown protocol %s", str_uri
);
224 if (proto
->code
== P_NET
|| proto
->code
== P_NET6
) {
225 /* Special case for net:// which requires two URI objects */
229 /* Allocate URI array */
230 tmp_uris
= zmalloc(sizeof(struct lttng_uri
) * size
);
231 if (tmp_uris
== NULL
) {
232 PERROR("zmalloc uri");
236 memset(subdir
, 0, sizeof(subdir
));
237 purl
+= strlen(proto
->leading_string
);
239 /* Copy known value to the first URI. */
240 tmp_uris
[0].dtype
= proto
->dtype
;
241 tmp_uris
[0].proto
= proto
->type
;
243 if (proto
->code
== P_FILE
) {
245 ERR("Missing destination full path.");
249 strncpy(tmp_uris
[0].dst
.path
, purl
, sizeof(tmp_uris
[0].dst
.path
));
250 tmp_uris
[0].dst
.path
[sizeof(tmp_uris
[0].dst
.path
) - 1] = '\0';
251 DBG3("URI file destination: %s", purl
);
255 /* Assume we are at the beginning of an address or host of some sort. */
259 * Handle IPv6 address inside square brackets as mention by RFC 2732. IPv6
260 * address that does not start AND end with brackets will be rejected even
263 * proto://[<addr>]...
267 /* Address begins after '[' */
269 addr_e
= strchr(addr_b
, ']');
270 if (addr_e
== NULL
|| addr_b
== addr_e
) {
271 ERR("Broken IPv6 address %s", addr_b
);
275 /* Moving parsed URL pointer after the final bracket ']' */
279 * The closing bracket must be followed by a seperator or NULL char.
281 if (strchr(seps
, *purl
) == NULL
) {
282 ERR("Unknown symbol after IPv6 address: %s", purl
);
286 purl
= strpbrk_or_eos(purl
, seps
);
290 /* Check if we at least have a char for the addr or hostname. */
291 if (addr_b
== addr_e
) {
292 ERR("No address or hostname detected.");
296 addr_f
= utils_strdupdelim(addr_b
, addr_e
);
297 if (addr_f
== NULL
) {
302 * Detect PORT after address. The net/net6 protocol allows up to two port
303 * so we can define the control and data port.
305 while (*purl
== ':') {
307 const char *port_b
, *port_e
;
310 /* Update pass counter */
314 * Maximum of two ports is possible if P_NET/NET6. Bigger than that,
317 if ((i
== 2 && (proto
->code
!= P_NET
&& proto
->code
!= P_NET6
))
323 * Move parsed URL to port value.
324 * proto://addr_host:PORT1:PORT2/foo/bar
329 purl
= strpbrk_or_eos(purl
, seps
);
332 if (port_b
!= port_e
) {
333 port_f
= utils_strdupdelim(port_b
, port_e
);
334 if (port_f
== NULL
) {
339 if (port
> 0xffff || port
<= 0x0) {
340 ERR("Invalid port number %d", port
);
354 /* Check for a valid subdir or trailing garbage */
357 * Move to subdir value.
358 * proto://addr_host:PORT1:PORT2/foo/bar
363 } else if (*purl
!= '\0') {
364 ERR("Trailing characters not recognized: %s", purl
);
368 /* We have enough valid information to create URI(s) object */
370 /* Copy generic information */
371 tmp_uris
[0].port
= ctrl_port
;
373 /* Copy subdirectory if one. */
375 strncpy(tmp_uris
[0].subdir
, subdir_b
, sizeof(tmp_uris
[0].subdir
));
376 tmp_uris
[0].subdir
[sizeof(tmp_uris
[0].subdir
) - 1] = '\0';
379 switch (proto
->code
) {
381 ret
= set_ip_address(addr_f
, AF_INET
, tmp_uris
[0].dst
.ipv4
,
382 sizeof(tmp_uris
[0].dst
.ipv4
));
387 memcpy(tmp_uris
[1].dst
.ipv4
, tmp_uris
[0].dst
.ipv4
, sizeof(tmp_uris
[1].dst
.ipv4
));
389 tmp_uris
[1].dtype
= proto
->dtype
;
390 tmp_uris
[1].proto
= proto
->type
;
391 tmp_uris
[1].port
= data_port
;
394 ret
= set_ip_address(addr_f
, AF_INET6
, tmp_uris
[0].dst
.ipv6
,
395 sizeof(tmp_uris
[0].dst
.ipv6
));
400 memcpy(tmp_uris
[1].dst
.ipv6
, tmp_uris
[0].dst
.ipv6
, sizeof(tmp_uris
[1].dst
.ipv6
));
402 tmp_uris
[1].dtype
= proto
->dtype
;
403 tmp_uris
[1].proto
= proto
->type
;
404 tmp_uris
[1].port
= data_port
;
407 ret
= set_ip_address(addr_f
, AF_INET
, tmp_uris
[0].dst
.ipv4
,
408 sizeof(tmp_uris
[0].dst
.ipv4
));
414 ret
= set_ip_address(addr_f
, AF_INET6
, tmp_uris
[0].dst
.ipv6
,
415 sizeof(tmp_uris
[0].dst
.ipv6
));
425 DBG3("URI dtype: %d, proto: %d, host: %s, subdir: %s, ctrl: %d, data: %d",
426 proto
->dtype
, proto
->type
, (addr_f
== NULL
) ? "" : addr_f
,
427 (subdir_b
== NULL
) ? "" : subdir_b
, ctrl_port
, data_port
);
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