*/
#define _GNU_SOURCE
+#include <assert.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <stdlib.h>
#include <common/common.h>
#include <common/defaults.h>
+#include <common/utils.h>
#include "uri.h"
};
struct uri_proto {
- char *name;
+ const char *name;
+ const char *leading_string;
enum uri_proto_code code;
enum lttng_proto_type type;
enum lttng_dst_type dtype;
/* Supported protocols */
static const struct uri_proto proto_uri[] = {
- { .name = "file", .code = P_FILE, .type = 0, .dtype = LTTNG_DST_PATH},
- { .name = "net", .code = P_NET, .type = LTTNG_TCP, .dtype = LTTNG_DST_IPV4 },
- { .name = "net6", .code = P_NET6, .type = LTTNG_TCP, .dtype = LTTNG_DST_IPV6 },
- { .name = "tcp", .code = P_TCP, .type = LTTNG_TCP, .dtype = LTTNG_DST_IPV4 },
- { .name = "tcp6", .code = P_TCP6, .type = LTTNG_TCP, .dtype = LTTNG_DST_IPV6 },
- { .name = NULL }
+ { .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 = "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 = "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).
+ */
+static const inline char *strpbrk_or_eos(const char *s, const char *accept)
+{
+ char *p = strpbrk(s, accept);
+ if (p == NULL) {
+ p = strchr(s, '\0');
+ }
+
+ return p;
+}
+
+
/*
* Validate if proto is a supported protocol from proto_uri array.
*/
-static const struct uri_proto *validate_protocol(char *proto)
+static const struct uri_proto *get_uri_proto(const char *uri_str)
{
- const struct uri_proto *supported;
+ const struct uri_proto *supported = NULL;
/* Safety net */
- if (proto == NULL) {
+ if (uri_str == NULL) {
goto end;
}
for (supported = &proto_uri[0];
- supported->name != NULL; ++supported) {
- if (strncmp(proto, supported->name, strlen(proto)) == 0) {
+ supported->leading_string != NULL; ++supported) {
+ if (strncasecmp(uri_str, supported->leading_string,
+ strlen(supported->leading_string)) == 0) {
goto end;
}
}
return supported;
}
+/*
+ * Set network address from string into dst. Supports both IP string and
+ * hostname.
+ */
+static int set_ip_address(const char *addr, int af, char *dst, size_t size)
+{
+ int ret;
+ 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) {
+ /* 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 {
+ if (size > 0) {
+ strncpy(dst, addr, size);
+ dst[size - 1] = '\0';
+ }
+ }
+
+ DBG2("IP address resolved to %s", dst);
+
+ return 0;
+
+error:
+ return -1;
+}
+
+/*
+ * Build a string URL from a lttng_uri object.
+ */
+__attribute__((visibility("hidden")))
+int uri_to_str_url(struct lttng_uri *uri, char *dst, size_t size)
+{
+ int ipver, ret;
+ const char *addr;
+ char proto[4], 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), "net%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.
*/
+__attribute__((visibility("hidden")))
int uri_compare(struct lttng_uri *uri1, struct lttng_uri *uri2)
{
return memcmp(uri1, uri2, sizeof(struct lttng_uri));
/*
* Free URI memory.
*/
+__attribute__((visibility("hidden")))
void uri_free(struct lttng_uri *uri)
{
/* Safety check */
/*
* Return an allocated URI.
*/
+__attribute__((visibility("hidden")))
struct lttng_uri *uri_create(void)
{
struct lttng_uri *uri;
return uri;
}
-static int set_ip_address(const char *addr, int af, char *dst, size_t size)
-{
- int ret;
- unsigned char buf[sizeof(struct in6_addr)];
- struct hostent *record;
-
- /* 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) {
- /* At this point, the IP or the hostname is bad */
- printf("bad hostname\n");
- goto error;
- }
-
- /* Translate IP to string */
- (void) inet_ntop(af, record->h_addr_list[0], dst, size);
- } else {
- memcpy(dst, addr, size);
- }
-
- return 0;
-
-error:
- return -1;
-}
-
+/*
+ * Parses a string URI to a lttng_uri. This function can potentially return
+ * more than one URI in uris so the size of the array is returned and uris is
+ * allocated and populated. Caller must free(3) the array.
+ *
+ * This function can not detect the stream type of the URI so the caller has to
+ * make sure the correct type (stype) is set on the return URI(s). The default
+ * port must also be set by the caller if the returned URI has its port set to
+ * zero.
+ *
+ * NOTE: A good part of the following code was inspired from the "wget" source
+ * tree from the src/url.c file and url_parse() function. Also, the
+ * strpbrk_or_eos() function found above is also inspired by the same code.
+ * 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.
+ */
+__attribute__((visibility("hidden")))
ssize_t uri_parse(const char *str_uri, struct lttng_uri **uris)
{
- int ret;
+ int ret, i = 0;
/* Size of the uris array. Default is 1 */
ssize_t size = 1;
- char net[6], dst[LTTNG_MAX_DNNAME + 1];
- unsigned int ctrl_port = DEFAULT_NETWORK_CONTROL_PORT;
- unsigned int data_port = DEFAULT_NETWORK_DATA_PORT;
- struct lttng_uri *uri;
+ char subdir[PATH_MAX];
+ unsigned int ctrl_port = 0;
+ unsigned int data_port = 0;
+ struct lttng_uri *tmp_uris;
+ char *addr_f = NULL;
const struct uri_proto *proto;
+ const char *purl, *addr_e, *addr_b, *subdir_b = NULL;
+ const char *seps = ":/\0";
/*
* The first part is the protocol portion of a maximum of 5 bytes for now.
- * (tcp, tcp6, udp, udp6, file, net). The second part is the hostname or IP
- * address. The 255 bytes size is the limit found in the RFC 1035 for the
- * total length of a domain name (https://www.ietf.org/rfc/rfc1035.txt).
- * Finally, with the net:// protocol, two ports can be specified.
+ * The second part is the hostname or IP address. The 255 bytes size is the
+ * limit found in the RFC 1035 for the total length of a domain name
+ * (https://www.ietf.org/rfc/rfc1035.txt). Finally, for the net://
+ * protocol, two ports CAN be specified.
*/
- ret = sscanf(str_uri, "%5[^:]://", net);
- if (ret < 1) {
- printf("bad protocol\n");
- goto error;
- }
-
- DBG3("URI protocol : %s", str_uri);
+ DBG3("URI string: %s", str_uri);
- proto = validate_protocol(net);
+ proto = get_uri_proto(str_uri);
if (proto == NULL) {
- printf("no protocol\n");
- ret = -1;
+ ERR("URI parse unknown protocol %s", str_uri);
goto error;
}
+ purl = str_uri;
+
if (proto->code == P_NET || proto->code == P_NET6) {
- /* Special case for net:// which requires two URI object */
+ /* Special case for net:// which requires two URI objects */
size = 2;
}
- /* Parse the rest of the URI */
- ret = sscanf(str_uri + strlen(net), "://%255[^:]:%u:%u", dst,
- &ctrl_port, &data_port);
- if (ret < 0) {
- printf("bad URI\n");
+ /* Allocate URI array */
+ tmp_uris = zmalloc(sizeof(struct lttng_uri) * size);
+ if (tmp_uris == NULL) {
+ PERROR("zmalloc uri");
goto error;
}
- /* We have enough valid information to create URI(s) object */
+ memset(subdir, 0, sizeof(subdir));
+ purl += strlen(proto->leading_string);
- /* Allocate URI array */
- uri = zmalloc(sizeof(struct lttng_uri) * size);
- if (uri == NULL) {
- PERROR("zmalloc uri");
- goto error;
+ /* Copy known value to the first URI. */
+ tmp_uris[0].dtype = proto->dtype;
+ tmp_uris[0].proto = proto->type;
+
+ if (proto->code == P_FILE) {
+ if (*purl != '/') {
+ ERR("Missing destination full path.");
+ goto free_error;
+ }
+
+ strncpy(tmp_uris[0].dst.path, purl, sizeof(tmp_uris[0].dst.path));
+ tmp_uris[0].dst.path[sizeof(tmp_uris[0].dst.path) - 1] = '\0';
+ DBG3("URI file destination: %s", purl);
+ goto end;
+ }
+
+ /* Assume we are at the beginning of an address or host of some sort. */
+ addr_b = purl;
+
+ /*
+ * Handle IPv6 address inside square brackets as mention by RFC 2732. IPv6
+ * address that does not start AND end with brackets will be rejected even
+ * if valid.
+ *
+ * proto://[<addr>]...
+ * ^
+ */
+ if (*purl == '[') {
+ /* Address begins after '[' */
+ addr_b = purl + 1;
+ addr_e = strchr(addr_b, ']');
+ if (addr_e == NULL || addr_b == addr_e) {
+ ERR("Broken IPv6 address %s", addr_b);
+ goto free_error;
+ }
+
+ /* Moving parsed URL pointer after the final bracket ']' */
+ purl = addr_e + 1;
+
+ /*
+ * The closing bracket must be followed by a seperator or NULL char.
+ */
+ if (strchr(seps, *purl) == NULL) {
+ ERR("Unknown symbol after IPv6 address: %s", purl);
+ goto free_error;
+ }
+ } else {
+ purl = strpbrk_or_eos(purl, seps);
+ addr_e = purl;
+ }
+
+ /* Check if we at least have a char for the addr or hostname. */
+ if (addr_b == addr_e) {
+ ERR("No address or hostname detected.");
+ goto free_error;
}
+ addr_f = utils_strdupdelim(addr_b, addr_e);
+ if (addr_f == NULL) {
+ goto free_error;
+ }
+
+ /*
+ * Detect PORT after address. The net/net6 protocol allows up to two port
+ * so we can define the control and data port.
+ */
+ while (*purl == ':') {
+ int port;
+ const char *port_b, *port_e;
+ char *port_f;
+
+ /* Update pass counter */
+ i++;
+
+ /*
+ * Maximum of two ports is possible if P_NET/NET6. Bigger than that,
+ * two much stuff.
+ */
+ if ((i == 2 && (proto->code != P_NET && proto->code != P_NET6))
+ || i > 2) {
+ break;
+ }
+
+ /*
+ * Move parsed URL to port value.
+ * proto://addr_host:PORT1:PORT2/foo/bar
+ * ^
+ */
+ ++purl;
+ port_b = purl;
+ purl = strpbrk_or_eos(purl, seps);
+ port_e = purl;
+
+ if (port_b != port_e) {
+ port_f = utils_strdupdelim(port_b, port_e);
+ if (port_f == NULL) {
+ goto free_error;
+ }
+
+ port = atoi(port_f);
+ if (port > 0xffff || port <= 0x0) {
+ ERR("Invalid port number %d", port);
+ free(port_f);
+ goto free_error;
+ }
+ free(port_f);
+
+ if (i == 1) {
+ ctrl_port = port;
+ } else {
+ data_port = port;
+ }
+ }
+ };
+
+ /* Check for a valid subdir or trailing garbage */
+ if (*purl == '/') {
+ /*
+ * Move to subdir value.
+ * proto://addr_host:PORT1:PORT2/foo/bar
+ * ^
+ */
+ ++purl;
+ subdir_b = purl;
+ } else if (*purl != '\0') {
+ ERR("Trailing characters not recognized: %s", purl);
+ goto free_error;
+ }
+
+ /* We have enough valid information to create URI(s) object */
+
/* Copy generic information */
- uri[0].dtype = proto->dtype;
- uri[0].proto = proto->type;
- uri[0].port = ctrl_port;
+ tmp_uris[0].port = ctrl_port;
- DBG3("URI dtype: %d, proto: %d, port: %d", proto->dtype, proto->type,
- ctrl_port);
+ /* Copy subdirectory if one. */
+ if (subdir_b) {
+ strncpy(tmp_uris[0].subdir, subdir_b, sizeof(tmp_uris[0].subdir));
+ tmp_uris[0].subdir[sizeof(tmp_uris[0].subdir) - 1] = '\0';
+ }
switch (proto->code) {
- case P_FILE:
- memcpy(uri[0].dst.path, dst, sizeof(uri[0].dst.path));
- /* Reset port for the file:// URI */
- uri[0].port = 0;
- DBG3("URI file destination: %s", dst);
- break;
case P_NET:
- ret = set_ip_address(dst, AF_INET, uri[0].dst.ipv4,
- sizeof(uri[0].dst.ipv4));
+ ret = set_ip_address(addr_f, AF_INET, tmp_uris[0].dst.ipv4,
+ sizeof(tmp_uris[0].dst.ipv4));
if (ret < 0) {
goto free_error;
}
- memcpy(uri[1].dst.ipv4, uri[0].dst.ipv4, sizeof(uri[1].dst.ipv4));
+ memcpy(tmp_uris[1].dst.ipv4, tmp_uris[0].dst.ipv4, sizeof(tmp_uris[1].dst.ipv4));
- uri[1].dtype = proto->dtype;
- uri[1].proto = proto->type;
- uri[1].port = data_port;
+ tmp_uris[1].dtype = proto->dtype;
+ tmp_uris[1].proto = proto->type;
+ tmp_uris[1].port = data_port;
break;
case P_NET6:
- ret = set_ip_address(dst, AF_INET6, uri[0].dst.ipv6,
- sizeof(uri[0].dst.ipv6));
+ ret = set_ip_address(addr_f, AF_INET6, tmp_uris[0].dst.ipv6,
+ sizeof(tmp_uris[0].dst.ipv6));
if (ret < 0) {
goto free_error;
}
- memcpy(uri[1].dst.ipv6, uri[0].dst.ipv6, sizeof(uri[1].dst.ipv6));
+ memcpy(tmp_uris[1].dst.ipv6, tmp_uris[0].dst.ipv6, sizeof(tmp_uris[1].dst.ipv6));
- uri[1].dtype = proto->dtype;
- uri[1].proto = proto->type;
- uri[1].port = data_port;
+ tmp_uris[1].dtype = proto->dtype;
+ tmp_uris[1].proto = proto->type;
+ tmp_uris[1].port = data_port;
break;
case P_TCP:
- ret = set_ip_address(dst, AF_INET, uri[0].dst.ipv4,
- sizeof(uri[0].dst.ipv4));
+ ret = set_ip_address(addr_f, AF_INET, tmp_uris[0].dst.ipv4,
+ sizeof(tmp_uris[0].dst.ipv4));
if (ret < 0) {
goto free_error;
}
break;
case P_TCP6:
- ret = set_ip_address(dst, AF_INET6, uri[0].dst.ipv6,
- sizeof(uri[0].dst.ipv6));
+ ret = set_ip_address(addr_f, AF_INET6, tmp_uris[0].dst.ipv6,
+ sizeof(tmp_uris[0].dst.ipv6));
if (ret < 0) {
goto free_error;
}
goto free_error;
}
- *uris = uri;
+end:
+ DBG3("URI dtype: %d, proto: %d, host: %s, subdir: %s, ctrl: %d, data: %d",
+ proto->dtype, proto->type, (addr_f == NULL) ? "" : addr_f,
+ (subdir_b == NULL) ? "" : subdir_b, ctrl_port, data_port);
+
+ free(addr_f);
+ *uris = tmp_uris;
return size;
free_error:
- free(uri);
+ free(addr_f);
+ free(tmp_uris);
error:
return -1;
}
projects / lttng-tools.git / blobdiff