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authorDaniel Baumann <daniel.baumann@progress-linux.org>2021-12-01 06:15:04 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2021-12-01 06:15:04 +0000
commite970e0b37b8bd7f246feb3f70c4136418225e434 (patch)
tree0b67c0ca45f56f2f9d9c5c2e725279ecdf52d2eb /aclk/aclk_proxy.c
parentAdding upstream version 1.31.0. (diff)
downloadnetdata-e970e0b37b8bd7f246feb3f70c4136418225e434.tar.xz
netdata-e970e0b37b8bd7f246feb3f70c4136418225e434.zip
Adding upstream version 1.32.0.upstream/1.32.0
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'aclk/aclk_proxy.c')
-rw-r--r--aclk/aclk_proxy.c186
1 files changed, 186 insertions, 0 deletions
diff --git a/aclk/aclk_proxy.c b/aclk/aclk_proxy.c
new file mode 100644
index 000000000..1701eb8e8
--- /dev/null
+++ b/aclk/aclk_proxy.c
@@ -0,0 +1,186 @@
+#include "aclk_proxy.h"
+
+#include "daemon/common.h"
+
+#define ACLK_PROXY_ENV "env"
+#define ACLK_PROXY_CONFIG_VAR "proxy"
+
+struct {
+ ACLK_PROXY_TYPE type;
+ const char *url_str;
+} supported_proxy_types[] = {
+ { .type = PROXY_TYPE_SOCKS5, .url_str = "socks5" ACLK_PROXY_PROTO_ADDR_SEPARATOR },
+ { .type = PROXY_TYPE_SOCKS5, .url_str = "socks5h" ACLK_PROXY_PROTO_ADDR_SEPARATOR },
+ { .type = PROXY_TYPE_HTTP, .url_str = "http" ACLK_PROXY_PROTO_ADDR_SEPARATOR },
+ { .type = PROXY_TYPE_UNKNOWN, .url_str = NULL },
+};
+
+const char *aclk_proxy_type_to_s(ACLK_PROXY_TYPE *type)
+{
+ switch (*type) {
+ case PROXY_DISABLED:
+ return "disabled";
+ case PROXY_TYPE_HTTP:
+ return "HTTP";
+ case PROXY_TYPE_SOCKS5:
+ return "SOCKS";
+ default:
+ return "Unknown";
+ }
+}
+
+static inline ACLK_PROXY_TYPE aclk_find_proxy(const char *string)
+{
+ int i = 0;
+ while (supported_proxy_types[i].url_str) {
+ if (!strncmp(supported_proxy_types[i].url_str, string, strlen(supported_proxy_types[i].url_str)))
+ return supported_proxy_types[i].type;
+ i++;
+ }
+ return PROXY_TYPE_UNKNOWN;
+}
+
+ACLK_PROXY_TYPE aclk_verify_proxy(const char *string)
+{
+ if (!string)
+ return PROXY_TYPE_UNKNOWN;
+
+ while (*string == 0x20)
+ string++;
+
+ if (!*string)
+ return PROXY_TYPE_UNKNOWN;
+
+ return aclk_find_proxy(string);
+}
+
+// helper function to censor user&password
+// for logging purposes
+void safe_log_proxy_censor(char *proxy)
+{
+ size_t length = strlen(proxy);
+ char *auth = proxy + length - 1;
+ char *cur;
+
+ while ((auth >= proxy) && (*auth != '@'))
+ auth--;
+
+ //if not found or @ is first char do nothing
+ if (auth <= proxy)
+ return;
+
+ cur = strstr(proxy, ACLK_PROXY_PROTO_ADDR_SEPARATOR);
+ if (!cur)
+ cur = proxy;
+ else
+ cur += strlen(ACLK_PROXY_PROTO_ADDR_SEPARATOR);
+
+ while (cur < auth) {
+ *cur = 'X';
+ cur++;
+ }
+}
+
+static inline void safe_log_proxy_error(char *str, const char *proxy)
+{
+ char *log = strdupz(proxy);
+ safe_log_proxy_censor(log);
+ error("%s Provided Value:\"%s\"", str, log);
+ freez(log);
+}
+
+static inline int check_socks_enviroment(const char **proxy)
+{
+ char *tmp = getenv("socks_proxy");
+
+ if (!tmp)
+ return 1;
+
+ if (aclk_verify_proxy(tmp) == PROXY_TYPE_SOCKS5) {
+ *proxy = tmp;
+ return 0;
+ }
+
+ safe_log_proxy_error(
+ "Environment var \"socks_proxy\" defined but of unknown format. Supported syntax: \"socks5[h]://[user:pass@]host:ip\".",
+ tmp);
+ return 1;
+}
+
+static inline int check_http_enviroment(const char **proxy)
+{
+ char *tmp = getenv("http_proxy");
+
+ if (!tmp)
+ return 1;
+
+ if (aclk_verify_proxy(tmp) == PROXY_TYPE_HTTP) {
+ *proxy = tmp;
+ return 0;
+ }
+
+ safe_log_proxy_error(
+ "Environment var \"http_proxy\" defined but of unknown format. Supported syntax: \"http[s]://[user:pass@]host:ip\".",
+ tmp);
+ return 1;
+}
+
+const char *aclk_lws_wss_get_proxy_setting(ACLK_PROXY_TYPE *type)
+{
+ const char *proxy = config_get(CONFIG_SECTION_CLOUD, ACLK_PROXY_CONFIG_VAR, ACLK_PROXY_ENV);
+ *type = PROXY_DISABLED;
+
+ if (strcmp(proxy, "none") == 0)
+ return proxy;
+
+ if (strcmp(proxy, ACLK_PROXY_ENV) == 0) {
+ if (check_socks_enviroment(&proxy) == 0) {
+#ifdef LWS_WITH_SOCKS5
+ *type = PROXY_TYPE_SOCKS5;
+ return proxy;
+#else
+ safe_log_proxy_error("socks_proxy environment variable set to use SOCKS5 proxy "
+ "but Libwebsockets used doesn't have SOCKS5 support built in. "
+ "Ignoring and checking for other options.",
+ proxy);
+#endif
+ }
+ if (check_http_enviroment(&proxy) == 0)
+ *type = PROXY_TYPE_HTTP;
+ return proxy;
+ }
+
+ *type = aclk_verify_proxy(proxy);
+#ifndef LWS_WITH_SOCKS5
+ if (*type == PROXY_TYPE_SOCKS5) {
+ safe_log_proxy_error(
+ "Config var \"" ACLK_PROXY_CONFIG_VAR
+ "\" set to use SOCKS5 proxy but Libwebsockets used is built without support for SOCKS proxy. ACLK will be disabled.",
+ proxy);
+ }
+#endif
+ if (*type == PROXY_TYPE_UNKNOWN) {
+ *type = PROXY_DISABLED;
+ safe_log_proxy_error(
+ "Config var \"" ACLK_PROXY_CONFIG_VAR
+ "\" defined but of unknown format. Supported syntax: \"socks5[h]://[user:pass@]host:ip\".",
+ proxy);
+ }
+
+ return proxy;
+}
+
+// helper function to read settings only once (static)
+// as claiming, challenge/response and ACLK
+// read the same thing, no need to parse again
+const char *aclk_get_proxy(ACLK_PROXY_TYPE *type)
+{
+ static const char *proxy = NULL;
+ static ACLK_PROXY_TYPE proxy_type = PROXY_NOT_SET;
+
+ if (proxy_type == PROXY_NOT_SET)
+ proxy = aclk_lws_wss_get_proxy_setting(&proxy_type);
+
+ *type = proxy_type;
+ return proxy;
+}