2 * Copyright (c) 2018, JANET(UK)
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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42 #include <mon_internal.h>
43 #include <tr_socket.h>
47 #include "mons_handlers.h"
50 * Allocate a new MONS_INSTANCE
52 * @param mem_ctx talloc context for allocation
53 * @return new MONS_INSTANCE or null on failure
55 MONS_INSTANCE *mons_new(TALLOC_CTX *mem_ctx)
57 MONS_INSTANCE *mons = talloc(mem_ctx, MONS_INSTANCE);
60 mons->hostname = NULL;
64 mons->req_handler = NULL;
65 mons->auth_handler = NULL;
67 mons->authorized_gss_names = tr_gss_names_new(mons);
68 if (mons->authorized_gss_names == NULL) {
77 * Callback to process a request and produce a response
79 * @param req_str JSON-encoded request
80 * @param data pointer to a MONS_INSTANCE
81 * @return pointer to the response string or null to send no response
83 static TR_MSG *mons_req_cb(TALLOC_CTX *mem_ctx, TR_MSG *req_msg, void *data)
85 TALLOC_CTX *tmp_ctx = talloc_new(NULL);
86 //MONS_INSTANCE *mons = talloc_get_type_abort(data, MONS_INSTANCE);
88 TR_MSG *resp_msg = NULL; /* This is the response value */
94 req = tr_msg_get_mon_req(req_msg);
96 /* this is an internal error */
97 tr_err("mons_req_cb: Received incorrect message type (was %d, expected %d)",
98 tr_msg_get_msg_type(req_msg),
100 /* TODO send an error response */
105 talloc_free(tmp_ctx);
110 * Create a listener for monitoring requests
112 * Accept connections with mons_accept()
114 * @param mons monitoring server instance
116 * @param auth_handler
124 int mons_get_listener(MONS_INSTANCE *mons, MONS_REQ_FUNC *req_handler, MONS_AUTH_FUNC *auth_handler, const char *hostname,
125 unsigned int port, void *cookie, int *fd_out, size_t max_fd)
131 n_fd = tr_sock_listen_all(port, fd_out, max_fd);
133 tr_err("mons_get_listener: Error opening port %d");
135 /* opening port succeeded */
136 tr_info("mons_get_listener: Opened port %d.", port);
138 /* make this socket non-blocking */
139 for (ii=0; ii<n_fd; ii++) {
140 if (0 != fcntl(fd_out[ii], F_SETFL, O_NONBLOCK)) {
141 tr_err("mons_get_listener: Error setting O_NONBLOCK.");
142 for (ii=0; ii<n_fd; ii++) {
153 /* store the caller's request handler & cookie */
154 mons->req_handler = req_handler;
155 mons->auth_handler = auth_handler;
156 mons->hostname = hostname;
157 mons->cookie = cookie;
164 * Accept and process a connection on a port opened with mons_get_listener()
166 * @param mons monitoring interface instance
167 * @param listen FD of the connection socket
168 * @return 0 on success
170 int mons_accept(MONS_INSTANCE *mons, int listen)
175 if (0 > (conn = accept(listen, NULL, NULL))) {
176 perror("Error from monitoring interface accept()");
180 if (0 > (pid = fork())) {
181 perror("Error on fork()");
187 tr_gss_handle_connection(conn,
188 "trustmonitor", mons->hostname, /* acceptor name */
189 mons->auth_handler, mons->cookie, /* auth callback and cookie */
190 mons_req_cb, mons /* req callback and cookie */
193 exit(0); /* exit to kill forked child process */
198 /* clean up any processes that have completed */
199 while (waitpid(-1, 0, WNOHANG) > 0);