2 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version 2
7 * of the License, or (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
24 #include <sys/socket.h>
26 #include <sys/types.h>
30 #include "liblttsessiondcomm.h"
33 * Human readable error message.
35 static const char *lttcomm_readable_code
[] = {
36 [ LTTCOMM_ERR_INDEX(LTTCOMM_OK
) ] = "Success",
37 [ LTTCOMM_ERR_INDEX(LTTCOMM_ERR
) ] = "Unknown error",
38 [ LTTCOMM_ERR_INDEX(LTTCOMM_UND
) ] = "Undefined command",
39 [ LTTCOMM_ERR_INDEX(LTTCOMM_NO_SESSION
) ] = "No session found",
40 [ LTTCOMM_ERR_INDEX(LTTCOMM_LIST_FAIL
) ] = "Unable to list traceable apps",
41 [ LTTCOMM_ERR_INDEX(LTTCOMM_NO_APPS
) ] = "No traceable apps found",
42 [ LTTCOMM_ERR_INDEX(LTTCOMM_NO_SESS
) ] = "No session found",
43 [ LTTCOMM_ERR_INDEX(LTTCOMM_FATAL
) ] = "Fatal error of the session daemon",
44 [ LTTCOMM_ERR_INDEX(LTTCOMM_CREATE_FAIL
) ] = "Create trace failed",
45 [ LTTCOMM_ERR_INDEX(LTTCOMM_START_FAIL
) ] = "Start trace failed",
46 [ LTTCOMM_ERR_INDEX(LTTCOMM_NO_TRACEABLE
) ] = "App is not traceable",
47 [ LTTCOMM_ERR_INDEX(LTTCOMM_SELECT_SESS
) ] = "A session MUST be selected",
48 [ LTTCOMM_ERR_INDEX(LTTCOMM_EXIST_SESS
) ] = "Session name already exist",
52 * lttcom_get_readable_code
54 * Return ptr to string representing a human readable
55 * error code from the lttcomm_return_code enum.
57 * These code MUST be negative in other to treat that
60 const char *lttcomm_get_readable_code(enum lttcomm_return_code code
)
64 if (tmp_code
>= LTTCOMM_OK
&& tmp_code
< LTTCOMM_NR
) {
65 return lttcomm_readable_code
[LTTCOMM_ERR_INDEX(tmp_code
)];
68 return "Unknown error code";
72 * lttcomm_connect_unix_sock
74 * Connect to unix socket using the path name.
76 int lttcomm_connect_unix_sock(const char *pathname
)
78 struct sockaddr_un sun
;
82 fd
= socket(PF_UNIX
, SOCK_STREAM
, 0);
88 memset(&sun
, 0, sizeof(sun
));
89 sun
.sun_family
= AF_UNIX
;
90 strncpy(sun
.sun_path
, pathname
, sizeof(sun
.sun_path
));
92 ret
= connect(fd
, (struct sockaddr
*) &sun
, sizeof(sun
));
105 * lttcomm_accept_unix_sock
107 * Do an accept(2) on the sock and return the
108 * new file descriptor. The socket MUST be bind(2) before.
110 int lttcomm_accept_unix_sock(int sock
)
113 struct sockaddr_un sun
;
117 new_fd
= accept(sock
, (struct sockaddr
*) &sun
, &len
);
130 * lttcomm_create_unix_sock
132 * Creates a AF_UNIX local socket using pathname
133 * bind the socket upon creation and return the fd.
135 int lttcomm_create_unix_sock(const char *pathname
)
137 struct sockaddr_un sun
;
141 /* Create server socket */
142 if ((fd
= socket(PF_UNIX
, SOCK_STREAM
, 0)) < 0) {
147 memset(&sun
, 0, sizeof(sun
));
148 sun
.sun_family
= AF_UNIX
;
149 strncpy(sun
.sun_path
, pathname
, strlen(pathname
));
151 ret
= bind(fd
, (struct sockaddr
*) &sun
, sizeof(sun
));
164 * lttcomm_listen_unix_sock
166 * Make the socket listen using MAX_LISTEN.
168 int lttcomm_listen_unix_sock(int sock
)
172 ret
= listen(sock
, MAX_LISTEN
);
181 * lttcomm_recv_unix_sock
183 * Receive data of size len in put that data into
184 * the buf param. Using recvmsg API.
185 * Return the size of received data.
187 ssize_t
lttcomm_recv_unix_sock(int sock
, void *buf
, size_t len
)
193 memset(&msg
, 0, sizeof(msg
));
195 iov
[0].iov_base
= buf
;
196 iov
[0].iov_len
= len
;
200 ret
= recvmsg(sock
, &msg
, 0);
209 * lttcomm_send_unix_sock
211 * Send buf data of size len. Using sendmsg API.
212 * Return the size of sent data.
214 ssize_t
lttcomm_send_unix_sock(int sock
, void *buf
, size_t len
)
220 memset(&msg
, 0, sizeof(msg
));
222 iov
[0].iov_base
= buf
;
223 iov
[0].iov_len
= len
;
227 ret
= sendmsg(sock
, &msg
, 0);
236 * lttcomm_close_unix_sock
238 * Shutdown cleanly a unix socket.
240 int lttcomm_close_unix_sock(int sock
)
244 /* Shutdown receptions and transmissions */
245 ret
= shutdown(sock
, SHUT_RDWR
);
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