path: root/jni/src/pppoe_ctrl.c (plain)
blob: a1ef8447aa266846a2d09ac6bf5d837fccec6d18

1	#include <stdlib.h>
2	#include <stdio.h>
3	#include <stdarg.h>
4	#include <string.h>
5
6	#include <sys/types.h>
7	#include <errno.h>
8
9	#include <unistd.h>
10
11	#include <sys/socket.h>
12	#include <netinet/in.h>
13
14	#include <sys/un.h>
15	#include <android/log.h>
16	#include "pppoe_ctrl.h"
17
18
19	#define LOCAL_TAG "PPPOE_CTRL"
20
21	struct pppoe_ctrl * pppoe_ctrl_open(const char *ctrl_path)
22	{
23	struct pppoe_ctrl *ctrl;
24	static int counter = 0;
25	int ret;
26	size_t res;
27	int tries = 0;
28
29	__android_log_print(ANDROID_LOG_INFO, LOCAL_TAG,"%s(ctrl_path = %s)\n", __FUNCTION__, ctrl_path);
30	ctrl = malloc(sizeof(*ctrl));
31	if (ctrl == NULL)
32	return NULL;
33	memset(ctrl, 0, sizeof(*ctrl));
34
35	ctrl->s = socket(PF_UNIX, SOCK_DGRAM, 0);
36	if (ctrl->s < 0) {
37	free(ctrl);
38	return NULL;
39	}
40	__android_log_print(ANDROID_LOG_INFO, LOCAL_TAG,"%s(ctrl->s = %d)\n", __FUNCTION__, ctrl->s);
41
42	ctrl->local.sun_family = AF_UNIX;
43	counter++;
44	try_again:
45	ret = snprintf(ctrl->local.sun_path, sizeof(ctrl->local.sun_path),
46	"/dev/socket/ppp_cli-%d", getpid());
47
48	__android_log_print(ANDROID_LOG_INFO, LOCAL_TAG,"%s: ctrl->local.sun_path: %s\n", __FUNCTION__, ctrl->local.sun_path);
49	if (ret < 0 || (size_t) ret >= sizeof(ctrl->local.sun_path)) {
50	close(ctrl->s);
51	free(ctrl);
52	return NULL;
53	}
54	tries++;
55	if (bind(ctrl->s, (struct sockaddr *) &ctrl->local,
56	sizeof(ctrl->local)) < 0) {
57	#if 0
58	if (errno == EADDRINUSE && tries < 2) {
59	/*
60	* getpid() returns unique identifier for this instance
61	* of pppoe_ctrl, so the existing socket file must have
62	* been left by unclean termination of an earlier run.
63	* Remove the file and try again.
64	*/
65	unlink(ctrl->local.sun_path);
66	goto try_again;
67	}
68
69	__android_log_print(ANDROID_LOG_ERROR, LOCAL_TAG,"%s: bind failed(%s)\n", __FUNCTION__, strerror(errno));
70	close(ctrl->s);
71	free(ctrl);
72	return NULL;
73	#endif
74	}
75
76	ctrl->dest.sun_family = AF_UNIX;
77	res = strlcpy(ctrl->dest.sun_path, ctrl_path,
78	sizeof(ctrl->dest.sun_path));
79	if (res >= sizeof(ctrl->dest.sun_path)) {
80	close(ctrl->s);
81	free(ctrl);
82	return NULL;
83	}
84
85	__android_log_print(ANDROID_LOG_INFO, LOCAL_TAG,"%s: ctrl->dest.sun_path: %s\n", __FUNCTION__, ctrl->dest.sun_path);
86	if (connect(ctrl->s, (struct sockaddr *) &ctrl->dest,
87	sizeof(ctrl->dest)) < 0) {
88	close(ctrl->s);
89	__android_log_print(ANDROID_LOG_ERROR, LOCAL_TAG,"%s: connection failed\n", __FUNCTION__);
90	unlink(ctrl->local.sun_path);
91	free(ctrl);
92	return NULL;
93	}
94
95	__android_log_print(ANDROID_LOG_INFO, LOCAL_TAG,"connection to ppp_wrapper OK\n");
96	return ctrl;
97	}
98
99
100	void pppoe_ctrl_close(struct pppoe_ctrl *ctrl)
101	{
102	if (ctrl == NULL)
103	return;
104	unlink(ctrl->local.sun_path);
105	if (ctrl->s >= 0)
106	close(ctrl->s);
107	free(ctrl);
108	}
109
110
111
112	int pppoe_ctrl_request(struct pppoe_ctrl *ctrl, const char *cmd, size_t cmd_len)
113	{
114	if (send(ctrl->s, cmd, cmd_len, 0) < 0) {
115	__android_log_print(ANDROID_LOG_ERROR, LOCAL_TAG,"send command[%s] failed\n", cmd);
116	return -1;
117	}
118
119	__android_log_print(ANDROID_LOG_INFO, LOCAL_TAG,"send command[%s] OK\n", cmd);
120	return 0;
121	}
122
123
124	int pppoe_ctrl_get_fd(struct pppoe_ctrl *ctrl)
125	{
126	return ctrl->s;
127	}
128
129
130