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fix ping loss, add ttl from ip header compile .h file to detect changes

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tomoron
2025-05-22 15:30:34 +02:00
parent b96652f9a4
commit 94085f5bb2
6 changed files with 44 additions and 31 deletions
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10
Makefile
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@ -1,8 +1,9 @@
NAME = ft_ping NAME = ft_ping
CC=cc CC=cc
FLAGS=-Werror -Wextra -Wall -g -Wno-unused-result FLAGS=-Werror -Wextra -Wall -g -Wno-unused-result -Qunused-arguments
SRCS_DIR = srcs SRCS_DIR = srcs
INCLUDES_DIR = srcs/includes
OBJS_DIR = .objs OBJS_DIR = .objs
SRCS = main.c\ SRCS = main.c\
@ -13,7 +14,10 @@ SRCS = main.c\
stats.c\ stats.c\
waitlist_utils.c waitlist_utils.c
OBJS = $(addprefix $(OBJS_DIR)/,$(SRCS:.c=.o)) INCLUDES = ft_ping.h
OBJS = $(addprefix $(OBJS_DIR)/,$(SRCS:.c=.o))\
$(addprefix $(OBJS_DIR)/,$(INCLUDES:.h=.pch))
all: $(NAME) all: $(NAME)
@ -25,6 +29,8 @@ $(OBJS_DIR):
$(OBJS_DIR)/%.o: $(SRCS_DIR)/%.c $(OBJS_DIR)/%.o: $(SRCS_DIR)/%.c
$(CC) $(FLAGS) -c $< -o $@ $(CC) $(FLAGS) -c $< -o $@
$(OBJS_DIR)/%.pch: $(INCLUDES_DIR)/%.h
$(CC) $(FLAGS) -c $< -o $@
clean: clean:
rm -rf $(OBJS_DIR) rm -rf $(OBJS_DIR)

4
srcs/ft_ping.c
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@ -6,7 +6,7 @@
/* By: tomoron <tomoron@student.42angouleme.fr> +#+ +:+ +#+ */ /* By: tomoron <tomoron@student.42angouleme.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */ /* +#+#+#+#+#+ +#+ */
/* Created: 2025/04/26 19:54:25 by tomoron #+# #+# */ /* Created: 2025/04/26 19:54:25 by tomoron #+# #+# */
/* Updated: 2025/05/02 23:55:50 by tomoron ### ########.fr */ /* Updated: 2025/05/22 15:24:43 by tomoron ### ########.fr */
/* */ /* */
/* ************************************************************************** */ /* ************************************************************************** */
@ -53,7 +53,7 @@ void ping_end_print(t_settings *set, char *host, t_stats *stats)
if(isnan(stddev) || isinf(stddev)) if(isnan(stddev) || isinf(stddev))
stddev = 0.0f; stddev = 0.0f;
printf("--- %s ping statistics ---\n", host); printf("--- %s ping statistics ---\n", host);
percent = ((double)stats->sent / 100) * stats->received; percent = ((double)(stats->sent - stats->received) / stats->sent) * 100.0;
printf("%lu packets transmitted, %lu packets received, %d%% packet loss\n", stats->sent, stats->received, percent); printf("%lu packets transmitted, %lu packets received, %d%% packet loss\n", stats->sent, stats->received, percent);
printf("round-trip min/avg/max/stddev = %.3f/%.3f/%.3f/%.3f ms\n", stats->min, stats->avg, stats->max, stddev); printf("round-trip min/avg/max/stddev = %.3f/%.3f/%.3f/%.3f ms\n", stats->min, stats->avg, stats->max, stddev);
} }

25
srcs/icmp.c
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@ -6,7 +6,7 @@
/* By: tomoron <tomoron@student.42angouleme.fr> +#+ +:+ +#+ */ /* By: tomoron <tomoron@student.42angouleme.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */ /* +#+#+#+#+#+ +#+ */
/* Created: 2025/04/24 22:49:22 by tomoron #+# #+# */ /* Created: 2025/04/24 22:49:22 by tomoron #+# #+# */
/* Updated: 2025/05/01 20:19:41 by tomoron ### ########.fr */ /* Updated: 2025/05/22 15:26:40 by tomoron ### ########.fr */
/* */ /* */
/* ************************************************************************** */ /* ************************************************************************** */
#include "includes/ft_ping.h" #include "includes/ft_ping.h"
@ -87,20 +87,21 @@ t_waitlist *send_icmp(t_settings *set, struct addrinfo *host, uint16_t *seq, str
void receive_icmp(t_settings *set, struct addrinfo *info, t_waitlist **wl, t_stats *stats) void receive_icmp(t_settings *set, struct addrinfo *info, t_waitlist **wl, t_stats *stats)
{ {
size_t len; size_t len;
char buf[256]; t_icmp_ip_reply res;
t_icmp_echo *res;
uint16_t checksum; uint16_t checksum;
len = recvfrom(set->socket, buf, sizeof(t_icmp_echo) + 20, 0, info->ai_addr, &info->ai_addrlen); len = recvfrom(set->socket, &res, sizeof(t_icmp_ip_reply), 0, info->ai_addr, &info->ai_addrlen);
res = (void*)(buf + 20);
if(len == (size_t)-1 || len < 84) if(len < sizeof(t_icmp_ip_reply))
return; return;
if(res->type != 0 && res->identifier != set->id) if(len == (size_t)-1 )
return; return;
checksum = res->checksum; if(res.icmp.type != 0 && res.icmp.identifier != set->id)
res->checksum = 0;
if(calc_checksum(res, sizeof(t_icmp_echo)) != checksum)
return ; return ;
res->sequence = htons(res->sequence); checksum = res.icmp.checksum;
waitlist_remove(wl, res->sequence, set, stats); res.icmp.checksum = 0;
if(calc_checksum(&res.icmp, sizeof(t_icmp_echo)) != checksum)
return ;
res.icmp.sequence = htons(res.icmp.sequence);
waitlist_remove(wl, res.icmp.sequence, set, stats, res.header.ttl);
} }

24
srcs/includes/ft_ping.h
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@ -15,6 +15,7 @@
#include <errno.h> #include <errno.h>
#include <sys/param.h> #include <sys/param.h>
#include <math.h> #include <math.h>
#include <netinet/ip.h>
#include <fcntl.h> #include <fcntl.h>
@ -23,13 +24,13 @@
#define HELP_MESSAGE " [OPTION...] HOST ...\n\ #define HELP_MESSAGE " [OPTION...] HOST ...\n\
Send ICMP ECHO_REQUEST packets to network hosts.\n\ Send ICMP ECHO_REQUEST packets to network hosts.\n\
\n\ \n\
-c, --count=N stop after sending NUMBER packets\n\ -c, --count=N Stop after sending NUMBER packets\n\
--ttl=N specify N as time-to-live\n\ --ttl=N Specify N as time-to-live\n\
-w, --timeout=N stop after N seconds\n\ -i, --interval=N Wait N seconds between sending each packet\n\
-i, --interval=N wait N seconds between sending each packet\n\ -w, --timeout=N Stop after N seconds\n\
-W, --linger=N number of seconds to wait for response\n\ -W, --linger=N Number of seconds to wait for response\n\
\n\ \n\
-?, --help give this help list\n" -?, --help Give this help list\n"
extern int g_stop; extern int g_stop;
@ -63,7 +64,6 @@ typedef struct s_settings
char *name; char *name;
char current_ip[INET_ADDRSTRLEN]; char current_ip[INET_ADDRSTRLEN];
} t_settings; } t_settings;
@ -78,6 +78,12 @@ typedef struct s_icmp_echo
uint8_t data[40]; uint8_t data[40];
} t_icmp_echo; } t_icmp_echo;
typedef struct __attribute__((__packed__))
{
struct iphdr header;
t_icmp_echo icmp;
} t_icmp_ip_reply;
typedef struct s_stats typedef struct s_stats
{ {
size_t sent; size_t sent;
@ -99,8 +105,8 @@ void show_help(t_settings *set, char *name);
void send_pings(t_settings *set); void send_pings(t_settings *set);
uint16_t calc_checksum(void *ptr, size_t len); uint16_t calc_checksum(void *ptr, size_t len);
double timediff(struct timeval *from); double timediff(struct timeval *from);
void waitlist_remove(t_waitlist **lst, uint16_t seq, t_settings *set, t_stats *stats); void waitlist_remove(t_waitlist **lst, uint16_t seq, t_settings *set, t_stats *stats, uint8_t ttl);
void show_ping_res_line(t_waitlist *cur, t_settings *set, uint16_t seq, t_stats *stats); void show_ping_res_line(t_waitlist *cur, t_settings *set, uint16_t seq, t_stats *stats, uint8_t ttl);
void waitlist_free(t_waitlist *lst); void waitlist_free(t_waitlist *lst);
t_waitlist *send_icmp(t_settings *set, struct addrinfo *host, uint16_t *seq, struct timeval *last, t_stats *stats); t_waitlist *send_icmp(t_settings *set, struct addrinfo *host, uint16_t *seq, struct timeval *last, t_stats *stats);
void waitlist_add(t_waitlist **waitlist, t_waitlist *elem); void waitlist_add(t_waitlist **waitlist, t_waitlist *elem);

6
srcs/stats.c
View File

@ -6,7 +6,7 @@
/* By: tomoron <tomoron@student.42angouleme.fr> +#+ +:+ +#+ */ /* By: tomoron <tomoron@student.42angouleme.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */ /* +#+#+#+#+#+ +#+ */
/* Created: 2025/05/01 17:41:42 by tomoron #+# #+# */ /* Created: 2025/05/01 17:41:42 by tomoron #+# #+# */
/* Updated: 2025/05/02 23:53:28 by tomoron ### ########.fr */ /* Updated: 2025/05/22 15:28:03 by tomoron ### ########.fr */
/* */ /* */
/* ************************************************************************** */ /* ************************************************************************** */
@ -28,12 +28,12 @@ void update_stats(t_stats *stats, double time)
stats->prev = time; stats->prev = time;
} }
void show_ping_res_line(t_waitlist *cur, t_settings *set, uint16_t seq, t_stats *stats) void show_ping_res_line(t_waitlist *cur, t_settings *set, uint16_t seq, t_stats *stats, uint8_t ttl)
{ {
double diff; double diff;
diff = timediff(&cur->time) * 1000; diff = timediff(&cur->time) * 1000;
update_stats(stats, diff); update_stats(stats, diff);
printf("%d bytes from %s: icmp_seq=%d ttl=??? time=%.3f ms\n", 64, set->current_ip, seq, diff); printf("%d bytes from %s: icmp_seq=%d ttl=%u time=%.3f ms\n", 64, set->current_ip, seq, ttl, diff);
} }

6
srcs/waitlist_utils.c
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@ -6,7 +6,7 @@
/* By: tomoron <tomoron@student.42angouleme.fr> +#+ +:+ +#+ */ /* By: tomoron <tomoron@student.42angouleme.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */ /* +#+#+#+#+#+ +#+ */
/* Created: 2025/05/01 17:38:58 by tomoron #+# #+# */ /* Created: 2025/05/01 17:38:58 by tomoron #+# #+# */
/* Updated: 2025/05/02 01:06:21 by tomoron ### ########.fr */ /* Updated: 2025/05/22 15:25:38 by tomoron ### ########.fr */
/* */ /* */
/* ************************************************************************** */ /* ************************************************************************** */
@ -38,7 +38,7 @@ void waitlist_free(t_waitlist *lst)
} }
} }
void waitlist_remove(t_waitlist **lst, uint16_t seq, t_settings *set, t_stats *stats) void waitlist_remove(t_waitlist **lst, uint16_t seq, t_settings *set, t_stats *stats, uint8_t ttl)
{ {
t_waitlist *prev; t_waitlist *prev;
t_waitlist *cur; t_waitlist *cur;
@ -57,7 +57,7 @@ void waitlist_remove(t_waitlist **lst, uint16_t seq, t_settings *set, t_stats *s
*lst = cur->next; *lst = cur->next;
else else
prev->next = cur->next; prev->next = cur->next;
show_ping_res_line(cur, set, seq, stats); show_ping_res_line(cur, set, seq, stats, ttl);
free(cur); free(cur);
} }