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Intel O-RAN/X-RAN Generated Doxygen Documentation
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xran_sync_api.c
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1 /******************************************************************************
2 *
3 * Copyright (c) 2019 Intel.
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 *
17 *******************************************************************************/
28 #include <assert.h>
29 #include <dirent.h>
30 #include <stdio.h>
31 #include <stdlib.h>
32 #include <string.h>
33 
34 #include "xran_sync_api.h"
35 #include "xran_printf.h"
36 
37 #define BUF_LEN 256
38 #define PROC_DIR "/proc"
39 #define COMM_FILE "comm"
40 #define PMC_CMD "pmc -u -b 0 'GET PORT_DATA_SET'"
41 #define PTP4L_PROC_NAME "ptp4l"
42 #define PHC2SYS_PROC_NAME "phc2sys"
43 
44 static int find_substr(const char *str, const unsigned int str_len,
45  const char *substr, const unsigned int substr_len)
46 {
47  assert(str);
48  assert(substr);
49  unsigned int ind = 0;
50 
51  while (ind + substr_len <= str_len) {
52  if (0 == strncmp(&str[ind], substr, substr_len))
53  return 0;
54  ++ind;
55  }
56  return 1;
57 }
58 
59 static int is_process_running(char *pname)
60 {
61  char full_path[BUF_LEN] = {0};
62  char read_proc_name[BUF_LEN] = {0};
63  int res = 1;
64  DIR *dir = opendir(PROC_DIR);
65  if (NULL == dir) {
66  return 1;
67  }
68 
69  struct dirent *entry = NULL;
70  while (entry = readdir(dir)) {
71  long pid = atol(entry->d_name);
72  if (0 == pid)
73  continue;
74  sprintf(full_path, "%s/%ld/%s", PROC_DIR, pid, COMM_FILE);
75  FILE *proc_name_file = fopen(full_path, "r");
76  if (NULL == proc_name_file)
77  continue;
78  fgets( read_proc_name, BUF_LEN, proc_name_file);
79  if (0 == strncmp(read_proc_name, pname, strlen(pname))) {
80  res = 0;
81  fclose(proc_name_file);
82  break;
83  }
84  fclose(proc_name_file);
85  }
86  closedir(dir);
87  return res;
88 }
89 
90 static int check_ptp_status()
91 {
92  char pmc_out_line[BUF_LEN];
93  const char *keywords[2] = {"portState", "SLAVE"};
94  int res = 1;
95  FILE *pmc_pipe = popen(PMC_CMD, "r");
96  if (NULL == pmc_pipe)
97  return 1;
98 
99  while(fgets(pmc_out_line, BUF_LEN, pmc_pipe)) {
100  if (0 == find_substr(pmc_out_line, strlen(pmc_out_line), keywords[0],
101  strlen(keywords[0]))) {
102  if (0 == find_substr(pmc_out_line, strlen(pmc_out_line),
103  keywords[1], strlen(keywords[1]))) {
104  res = 0;
105  break;
106  }
107  }
108  }
109  fclose(pmc_pipe);
110  return res;
111 }
112 
113 int xran_is_synchronized()
114 {
115  int res = 0;
116  res |= is_process_running(PTP4L_PROC_NAME);
117  print_dbg("PTP4L_PROC_NAME %d\n", res);
118  res |= is_process_running(PHC2SYS_PROC_NAME);
119  print_dbg("PHC2SYS_PROC_NAME %d\n", res);
120  res |= check_ptp_status();
121  print_dbg("check_ptp_status %d\n", res);
122  return res;
123 }
print_dbg
#define print_dbg(fmt, args...)
Definition: xran_printf.h:54
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fclose
fclose(fileID)
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PHC2SYS_PROC_NAME
#define PHC2SYS_PROC_NAME
Definition: xran_sync_api.c:42
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xran_sync_api.h
This file provides interface to synchronization related APIs (PTP/1588) for XRAN. ...
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COMM_FILE
#define COMM_FILE
Definition: xran_sync_api.c:39
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PMC_CMD
#define PMC_CMD
Definition: xran_sync_api.c:40
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PTP4L_PROC_NAME
#define PTP4L_PROC_NAME
Definition: xran_sync_api.c:41
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xran_printf.h
Modules provide debug prints and utility functions.
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BUF_LEN
#define BUF_LEN
Definition: xran_sync_api.c:37
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xran_is_synchronized
int xran_is_synchronized()
Function checks if machine is synchronized using PTP for Linux software.
Definition: xran_sync_api.c:113
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PROC_DIR
#define PROC_DIR
Definition: xran_sync_api.c:38
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master.res
def res
Definition: master.py:498
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