* Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
-#define _GNU_SOURCE
+#define _LGPL_SOURCE
+#include <assert.h>
#include <arpa/inet.h>
-#include <netdb.h>
+#include <common/compat/netdb.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include "uri.h"
+#define LOOPBACK_ADDR_IPV4 "127.0.0.1"
+#define LOOPBACK_ADDR_IPV6 "::1"
+
enum uri_proto_code {
P_NET, P_NET6, P_FILE, P_TCP, P_TCP6,
};
static const struct uri_proto proto_uri[] = {
{ .name = "file", .leading_string = "file://", .code = P_FILE, .type = 0, .dtype = LTTNG_DST_PATH },
{ .name = "net", .leading_string = "net://", .code = P_NET, .type = LTTNG_TCP, .dtype = LTTNG_DST_IPV4 },
+ { .name = "net4", .leading_string = "net4://", .code = P_NET, .type = LTTNG_TCP, .dtype = LTTNG_DST_IPV4 },
{ .name = "net6", .leading_string = "net6://", .code = P_NET6, .type = LTTNG_TCP, .dtype = LTTNG_DST_IPV6 },
{ .name = "tcp", .leading_string = "tcp://", .code = P_TCP, .type = LTTNG_TCP, .dtype = LTTNG_DST_IPV4 },
+ { .name = "tcp4", .leading_string = "tcp4://", .code = P_TCP, .type = LTTNG_TCP, .dtype = LTTNG_DST_IPV4 },
{ .name = "tcp6", .leading_string = "tcp6://", .code = P_TCP6, .type = LTTNG_TCP, .dtype = LTTNG_DST_IPV6 },
/* Invalid proto marking the end of the array. */
{ NULL, NULL, 0, 0, 0 }
* Return pointer to the character in s matching one of the characters in
* accept. If nothing is found, return pointer to the end of string (eos).
*/
-const inline char *strpbrk_or_eos(const char *s, const char *accept)
+static const inline char *strpbrk_or_eos(const char *s, const char *accept)
{
char *p = strpbrk(s, accept);
if (p == NULL) {
return p;
}
-
/*
* Validate if proto is a supported protocol from proto_uri array.
*/
unsigned char buf[sizeof(struct in6_addr)];
struct hostent *record;
+ assert(addr);
+ assert(dst);
+
+ memset(dst, 0, size);
+
/* Network protocol */
ret = inet_pton(af, addr, buf);
if (ret < 1) {
/* We consider the dst to be an hostname or an invalid IP char */
- record = gethostbyname2(addr, af);
- if (record == NULL) {
+ record = lttng_gethostbyname2(addr, af);
+ if (record) {
+ /* Translate IP to string */
+ if (!inet_ntop(af, record->h_addr_list[0], dst, size)) {
+ PERROR("inet_ntop");
+ goto error;
+ }
+ } else if (!strcmp(addr, "localhost") &&
+ (af == AF_INET || af == AF_INET6)) {
+ /*
+ * Some systems may not have "localhost" defined in
+ * accordance with IETF RFC 6761. According to this RFC,
+ * applications may recognize "localhost" names as
+ * special and resolve to the appropriate loopback
+ * address.
+ *
+ * We choose to use the system name resolution API first
+ * to honor its network configuration. If this fails, we
+ * resolve to the appropriate loopback address. This is
+ * done to accomodate systems which may want to start
+ * tracing before their network configured.
+ */
+ const char *loopback_addr = af == AF_INET ?
+ LOOPBACK_ADDR_IPV4 : LOOPBACK_ADDR_IPV6;
+ const size_t loopback_addr_len = af == AF_INET ?
+ sizeof(LOOPBACK_ADDR_IPV4) :
+ sizeof(LOOPBACK_ADDR_IPV6);
+
+ DBG2("Could not resolve localhost address, using fallback");
+ if (loopback_addr_len > size) {
+ ERR("Could not resolve localhost address; destination string is too short");
+ goto error;
+ }
+ strcpy(dst, loopback_addr);
+ } else {
/* At this point, the IP or the hostname is bad */
- ERR("URI parse bad hostname %s for af %d", addr, af);
goto error;
}
-
- /* Translate IP to string */
- (void) inet_ntop(af, record->h_addr_list[0], dst, size);
} else {
- memcpy(dst, addr, size);
+ if (size > 0) {
+ strncpy(dst, addr, size);
+ dst[size - 1] = '\0';
+ }
}
DBG2("IP address resolved to %s", dst);
-
return 0;
error:
+ ERR("URI parse bad hostname %s for af %d", addr, af);
return -1;
}
+/*
+ * Set default URI attribute which is basically the given stream type and the
+ * default port if none is set in the URI.
+ */
+static void set_default_uri_attr(struct lttng_uri *uri,
+ enum lttng_stream_type stype)
+{
+ uri->stype = stype;
+ if (uri->dtype != LTTNG_DST_PATH && uri->port == 0) {
+ uri->port = (stype == LTTNG_STREAM_CONTROL) ?
+ DEFAULT_NETWORK_CONTROL_PORT : DEFAULT_NETWORK_DATA_PORT;
+ }
+}
+
+/*
+ * Compare two URL destination.
+ *
+ * Return 0 is equal else is not equal.
+ */
+static int compare_destination(struct lttng_uri *ctrl, struct lttng_uri *data)
+{
+ int ret;
+
+ assert(ctrl);
+ assert(data);
+
+ switch (ctrl->dtype) {
+ case LTTNG_DST_IPV4:
+ ret = strncmp(ctrl->dst.ipv4, data->dst.ipv4, sizeof(ctrl->dst.ipv4));
+ break;
+ case LTTNG_DST_IPV6:
+ ret = strncmp(ctrl->dst.ipv6, data->dst.ipv6, sizeof(ctrl->dst.ipv6));
+ break;
+ default:
+ ret = -1;
+ break;
+ }
+
+ return ret;
+}
+
+/*
+ * Build a string URL from a lttng_uri object.
+ */
+LTTNG_HIDDEN
+int uri_to_str_url(struct lttng_uri *uri, char *dst, size_t size)
+{
+ int ipver, ret;
+ const char *addr;
+ char proto[5], port[7];
+
+ assert(uri);
+ assert(dst);
+
+ if (uri->dtype == LTTNG_DST_PATH) {
+ ipver = 0;
+ addr = uri->dst.path;
+ (void) snprintf(proto, sizeof(proto), "file");
+ (void) snprintf(port, sizeof(port), "%s", "");
+ } else {
+ ipver = (uri->dtype == LTTNG_DST_IPV4) ? 4 : 6;
+ addr = (ipver == 4) ? uri->dst.ipv4 : uri->dst.ipv6;
+ (void) snprintf(proto, sizeof(proto), "tcp%d", ipver);
+ (void) snprintf(port, sizeof(port), ":%d", uri->port);
+ }
+
+ ret = snprintf(dst, size, "%s://%s%s%s%s/%s", proto,
+ (ipver == 6) ? "[" : "", addr, (ipver == 6) ? "]" : "",
+ port, uri->subdir);
+ if (ret < 0) {
+ PERROR("snprintf uri to url");
+ }
+
+ return ret;
+}
+
/*
* Compare two URIs.
*
* Return 0 if equal else 1.
*/
+LTTNG_HIDDEN
int uri_compare(struct lttng_uri *uri1, struct lttng_uri *uri2)
{
return memcmp(uri1, uri2, sizeof(struct lttng_uri));
/*
* Free URI memory.
*/
+LTTNG_HIDDEN
void uri_free(struct lttng_uri *uri)
{
- /* Safety check */
- if (uri != NULL) {
- free(uri);
- }
+ free(uri);
}
/*
* Return an allocated URI.
*/
+LTTNG_HIDDEN
struct lttng_uri *uri_create(void)
{
struct lttng_uri *uri;
* This code was originally licensed GPLv2 so we acknolwedge the Free Software
* Foundation here for the work and to make sure we are compliant with it.
*/
+LTTNG_HIDDEN
ssize_t uri_parse(const char *str_uri, struct lttng_uri **uris)
{
int ret, i = 0;
* so we can define the control and data port.
*/
while (*purl == ':') {
- int port;
const char *port_b, *port_e;
char *port_f;
port_e = purl;
if (port_b != port_e) {
+ int port;
+
port_f = utils_strdupdelim(port_b, port_e);
if (port_f == NULL) {
goto free_error;
error:
return -1;
}
+
+/*
+ * Parse a string URL and creates URI(s) returning the size of the populated
+ * array.
+ */
+LTTNG_HIDDEN
+ssize_t uri_parse_str_urls(const char *ctrl_url, const char *data_url,
+ struct lttng_uri **uris)
+{
+ unsigned int equal = 1, idx = 0;
+ /* Add the "file://" size to the URL maximum size */
+ char url[PATH_MAX + 7];
+ ssize_t size_ctrl = 0, size_data = 0, size;
+ struct lttng_uri *ctrl_uris = NULL, *data_uris = NULL;
+ struct lttng_uri *tmp_uris = NULL;
+
+ /* No URL(s) is allowed. This means that the consumer will be disabled. */
+ if (ctrl_url == NULL && data_url == NULL) {
+ return 0;
+ }
+
+ /* Check if URLs are equal and if so, only use the control URL */
+ if ((ctrl_url && *ctrl_url != '\0') && (data_url && *data_url != '\0')) {
+ equal = !strcmp(ctrl_url, data_url);
+ }
+
+ /*
+ * Since we allow the str_url to be a full local filesystem path, we are
+ * going to create a valid file:// URL if it's the case.
+ *
+ * Check if first character is a '/' or else reject the URL.
+ */
+ if (ctrl_url && ctrl_url[0] == '/') {
+ int ret;
+
+ ret = snprintf(url, sizeof(url), "file://%s", ctrl_url);
+ if (ret < 0) {
+ PERROR("snprintf file url");
+ goto parse_error;
+ }
+ ctrl_url = url;
+ }
+
+ /* Parse the control URL if there is one */
+ if (ctrl_url && *ctrl_url != '\0') {
+ size_ctrl = uri_parse(ctrl_url, &ctrl_uris);
+ if (size_ctrl < 1) {
+ ERR("Unable to parse the URL %s", ctrl_url);
+ goto parse_error;
+ }
+
+ /* At this point, we know there is at least one URI in the array */
+ set_default_uri_attr(&ctrl_uris[0], LTTNG_STREAM_CONTROL);
+
+ if (ctrl_uris[0].dtype == LTTNG_DST_PATH &&
+ (data_url && *data_url != '\0')) {
+ ERR("Can not have a data URL when destination is file://");
+ goto error;
+ }
+
+ /* URL are not equal but the control URL uses a net:// protocol */
+ if (size_ctrl == 2) {
+ if (!equal) {
+ ERR("Control URL uses the net:// protocol and the data URL is "
+ "different. Not allowed.");
+ goto error;
+ } else {
+ set_default_uri_attr(&ctrl_uris[1], LTTNG_STREAM_DATA);
+ /*
+ * The data_url and ctrl_url are equal and the ctrl_url
+ * contains a net:// protocol so we just skip the data part.
+ */
+ data_url = NULL;
+ }
+ }
+ }
+
+ if (data_url && *data_url != '\0') {
+ int ret;
+
+ /* We have to parse the data URL in this case */
+ size_data = uri_parse(data_url, &data_uris);
+ if (size_data < 1) {
+ ERR("Unable to parse the URL %s", data_url);
+ goto error;
+ } else if (size_data == 2) {
+ ERR("Data URL can not be set with the net[4|6]:// protocol");
+ goto error;
+ }
+
+ set_default_uri_attr(&data_uris[0], LTTNG_STREAM_DATA);
+
+ ret = compare_destination(&ctrl_uris[0], &data_uris[0]);
+ if (ret != 0) {
+ ERR("Control and data destination mismatch");
+ goto error;
+ }
+ }
+
+ /* Compute total size */
+ size = size_ctrl + size_data;
+
+ tmp_uris = zmalloc(sizeof(struct lttng_uri) * size);
+ if (tmp_uris == NULL) {
+ PERROR("zmalloc uris");
+ goto error;
+ }
+
+ if (ctrl_uris) {
+ /* It's possible the control URIs array contains more than one URI */
+ memcpy(tmp_uris, ctrl_uris, sizeof(struct lttng_uri) * size_ctrl);
+ ++idx;
+ free(ctrl_uris);
+ }
+
+ if (data_uris) {
+ memcpy(&tmp_uris[idx], data_uris, sizeof(struct lttng_uri));
+ free(data_uris);
+ }
+
+ *uris = tmp_uris;
+
+ return size;
+
+error:
+ free(ctrl_uris);
+ free(data_uris);
+ free(tmp_uris);
+parse_error:
+ return -1;
+}
projects / lttng-tools.git / blobdiff