Premier commit

Co-authored-by: Côme Thuret

Optimisation/stats.c

@@ -0,0 +1,256 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <regex.h>
+
+#include "../include/utils.h"
+#include "../include/stats.h"
+#include "../include/db-sqlite.h"
+
+/*
+    -- get_ping_from_temp_log --
+    Desc :
+        Function which get the ping from a temp log containing the last ping did by the program
+    In-param :
+        None
+    Out-param :
+        None
+    Return value :
+        Ping value as a string or NULL if an error occured
+*/
+
+/*@null@*/char* get_ping_from_temp_log(){
+
+    /* Variables */
+    FILE* fd = NULL;
+    char* read_line = NULL;
+    size_t n = 0;
+    size_t nmatch = 2;
+    regex_t *p_reg;
+    regmatch_t* pmatch;
+    char* ping = NULL;
+    int start;
+    int end;
+    size_t size_ping;
+
+    /* regex struct memory allocation */
+    p_reg = (regex_t *) malloc(sizeof(*p_reg));
+    if(p_reg == NULL){
+        return ping; /* NULL */
+    }
+
+    /* Open ping log file */
+    fd = fopen("/var/log/ping-report/last-ping.log","r");
+    if(fd == NULL){
+        free(p_reg);
+        return ping; /* NULL */
+    }
+
+    /* Construct regex to get ping from log file */
+    if(regcomp(p_reg,"time=(.*) ms",REG_EXTENDED) != 0){
+        if(p_reg != NULL){
+            free(p_reg);
+        }
+        (void) fclose(fd);
+        return ping; /* NULL */
+    }
+
+    /* match info memory allocation */
+    pmatch = malloc(sizeof(*pmatch) * nmatch);
+    if(pmatch == NULL){
+        (void) fclose(fd);
+        regfree(p_reg);
+        free(p_reg);
+        return ping; /* NULL */
+    }
+
+    /* Read file */
+    while_stat(getline(&read_line,&n,fd));
+    
+    /* free allocated memory */
+    regfree(p_reg);
+    free(p_reg);
+    free(pmatch);
+    if(read_line != NULL){
+        free(read_line);
+    }
+
+    (void) fclose(fd);
+
+    /* ping may be null, then it must mean that the ping request was lost */
+    return ping;
+}
+
+void while_stat(int test){
+        
+    if(read_line == NULL){
+        return;
+    }
+
+    /* Exec regex to find ping */
+
+    if(regexec(p_reg,read_line,nmatch,pmatch,0) == 0){
+
+        /* Extract ping position from read line */
+        start = (int) pmatch[1].rm_so;
+        end = (int) pmatch[1].rm_eo;
+        size_ping = (size_t) (end - start);
+
+        /* ping string memory allocation */
+        ping = malloc(sizeof(char) * (size_ping+2));
+        if(ping == NULL){
+            free(read_line);
+            read_line = NULL;
+            n = 0;
+            return;
+        }
+
+        /* Create ping string */
+        (void) strncpy(ping, &read_line[start], size_ping);
+        ping[size_ping]='\n';
+        ping[size_ping+1]='\0';
+
+        /* Free memory */
+        free(read_line);
+         read_line = NULL;
+        n = 0;
+        return;
+    }
+
+    free(read_line);
+    read_line = NULL;
+    n = 0;
+    
+    if (test != -1){
+        while_stat(test);
+    }
+}
+
+/*
+    -- write_ping_log --
+    Desc :
+        Function which write a given ping in log file
+    In-param :
+        new_ping : string value of a ping
+    Out-param :
+        None
+    Return value :
+        None
+*/
+void write_ping_log(char* new_ping){
+    
+    /* Variables */
+    FILE* fd;
+
+    /* Open log file */
+    fd = fopen("/var/log/ping-report/all-ping.log","a+");
+    
+    if(fd != NULL){
+        if(new_ping == NULL){
+            new_ping = (char *) malloc(5*sizeof(char));
+            if(new_ping == NULL){
+                (void) fclose(fd);
+                return;
+            }
+            (void) snprintf(new_ping,5*sizeof(char),"LOSS");
+        }
+        (void) fwrite(new_ping, sizeof(char), strlen(new_ping), fd);
+        (void) fclose(fd);
+    }else{
+        perror("write ping : ");
+    }
+
+    free(new_ping);
+}
+
+/*
+    -- set_stats_ping --
+    Desc :
+        Function which calculate statistics about ping values, from log file.
+    In-param :
+        None
+    Out-param :
+        None
+    Return value :
+        None
+*/
+void set_stats_ping(){
+    
+    /* Variables */
+    FILE* fd;
+    /* Open log file */
+    fd = fopen("/var/log/ping-report/all-ping.log","r");
+    
+    if(fd != NULL){
+        /* Stats variables */
+        double ping = 0.0;
+        double sum = 0.0;
+        double max = 0.0;
+        double min = 100.0;
+        double mean = 0.0;
+        int nb_high = 0;
+        int nb_loss = 0;
+        int nb_ping = 0;
+        char* read_line = NULL;    
+        size_t n = 0;
+    
+        /* Read file */
+        while(getline(&read_line,&n,fd) != -1){
+            
+            /* Check getline error */
+            if(read_line == NULL){
+                break;
+            }
+
+            /* Check if the ping is flagged as LOSS */
+            if(strcmp(read_line,"LOSS") == 0){
+                nb_loss++;
+            }else{
+                /* Evaluate the ping as a double */
+                ping = strtod(read_line,NULL);
+                /* Test null ping */
+                if(ping < 0.1){
+                    /* Ignore null ping */
+                }else{
+                    /* Number of ping readed (for mean calculation) */
+                    nb_ping++;
+                    /* Max ping */
+                    if(ping > max){
+                        max = ping;
+                    }
+                    /* Min ping */
+                    if(ping < min){
+                        min = ping;
+                    }
+                    /* Number of ping above 100 ms */
+                    if(ping > 100.0){
+                        nb_high++;
+                    }
+                    /* Sum (for mean calculation) */
+                    sum += ping;
+                }
+            } 
+            free(read_line);
+            n = 0;
+        }
+    
+        /* Mean calculation */
+        mean = sum / (double) nb_ping;
+        (void) fclose(fd);
+
+        insert_hourly_report(mean,max,min,nb_high,nb_loss,nb_ping);
+
+        if(read_line != NULL){
+            free(read_line);
+        }
+
+    }else{
+        perror("stats : ");
+    }
+}
+
+

compte_rendu.md

@@ -0,0 +1,73 @@
+# Compte rendu TD2 :
+
+## fichier *daemon.c*
+
+**create_daemon**
+<br>
+```M = 4 ```
+
+**ping_request**
+<br>
+```M = 2```
+
+**send_check**
+<br>
+```M = 4```
+
+**check_keep_working**
+<br>
+```M = 4```
+
+**daemon_work**
+<br>
+```M = 3```
+
+## fichier *db-sqlite.c*
+
+**db_connect**
+<br>
+```M = 1```
+
+**db_disconnect**
+<br>
+```M = 1```
+
+**insert_hourly_report**
+<br>
+```M = 1```
+
+## fichier *ping-report.c*
+
+**main**
+<br>
+```M = 5```
+
+## fichier *stats.c*
+
+**get_ping_from_temp_log**
+<br>
+```M = 15```
+
+Graph :
+<br>
+<img src="./src/Capture_decran_2024-09-17_115202.png" />
+
+**write_ping_log**
+<br>
+```M = 4```
+
+**set_stats_ping**
+<br>
+```M =```
+
+## fichier *ping-report.c*
+
+**write_pid_file**
+<br>
+```M = 2```
+
+**remove_file**
+<br>
+```M = 1```
+
+## Optimisation