first commit
This commit is contained in:
Jack Halford
commit
5cd2bf7039
5 changed files with 276 additions and 0 deletions
3
nmap/.gitmodules
vendored
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3
nmap/.gitmodules
vendored
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@ -0,0 +1,3 @@
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[submodule "libft"]
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path = libft
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url = https://github.com/jzck/libft
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93
nmap/Makefile
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93
nmap/Makefile
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@ -0,0 +1,93 @@
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# **************************************************************************** #
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# #
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# ::: :::::::: #
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# Makefile :+: :+: :+: #
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# +:+ +:+ +:+ #
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# By: wescande <wescande@student.42.fr> +#+ +:+ +#+ #
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# +#+#+#+#+#+ +#+ #
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# Created: 2016/08/29 21:32:58 by wescande #+# #+# #
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# Updated: 2017/04/22 19:26:34 by jhalford ### ########.fr #
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# #
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# **************************************************************************** #
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NAME = ft_ping
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CC = gcc
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W_FLAGS = -Wall -Wextra -Werror
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D_FLAGS =
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FLAGS = $(W_FLAGS) $(D_FLAGS)
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LEN_NAME = `printf "%s" $(NAME) |wc -c`
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DELTA = $$(echo "$$(tput cols)-31-$(LEN_NAME)"|bc)
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LIBFT_DIR = libft/
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LIBFT_LIB = $(LIBFT_DIR)libft.a
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LIBFT_INC = $(LIBFT_DIR)includes/
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SRC_DIR = srcs/
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INC_DIR = includes/
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OBJ_DIR = objs/
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SRC_BASE = \
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ping.c\
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SRCS = $(addprefix $(SRC_DIR), $(SRC_BASE))
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OBJS = $(addprefix $(OBJ_DIR), $(SRC_BASE:.c=.o))
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NB = $(words $(SRC_BASE))
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INDEX = 0
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all :
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@make -C $(LIBFT_DIR)
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@make -j $(NAME)
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$(NAME): $(LIBFT_LIB) $(OBJ_DIR) $(OBJS) $(CLIENT_OBJ)
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@$(CC) $(OBJS) -o $@ \
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-I $(INC_DIR) \
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-I $(LIBFT_INC) \
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$(LIBFT_LIB) $(CLIENT_OBJ) $(FLAGS)
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@printf "\r\033[38;5;117m✓ MAKE $@ \033[0m\033[K\n"
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$(LIBFT_LIB):
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@make -C $(LIBFT_DIR)
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$(OBJ_DIR) :
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@mkdir -p $(OBJ_DIR)
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$(OBJ_DIR)%.o : $(SRC_DIR)%.c | $(OBJ_DIR)
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@$(eval DONE=$(shell echo $$(($(INDEX)*20/$(NB)))))
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@$(eval PERCENT=$(shell echo $$(($(INDEX)*100/$(NB)))))
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@$(eval TO_DO=$(shell echo $$((20-$(INDEX)*20/$(NB) - 1))))
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@$(eval COLOR=$(shell list=(160 196 202 208 215 221 226 227 190 154 118 82 46); index=$$(($(PERCENT) * $${#list[@]} / 100)); echo "$${list[$$index]}"))
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@printf "\r\033[38;5;%dm⌛ [%s]: %2d%% `printf '█%.0s' {0..$(DONE)}`%*s❙%*.*s\033[0m\033[K" $(COLOR) ft_p $(PERCENT) $(TO_DO) "" $(DELTA) $(DELTA) "$(shell echo "$@" | sed 's/^.*\///')"
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@$(CC) $(FLAGS) $(OBJ_FLAG) -MMD -c $< -o $@\
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-I $(INC_DIR)\
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-I $(LIBFT_INC)
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@$(eval INDEX=$(shell echo $$(($(INDEX)+1))))
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clean: cleanlib
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@if [ -e $(OBJ_DIR) ]; then \
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rm -rf $(OBJ_DIR); \
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printf "\r\033[38;5;202m✗ clean $(NAME) \033[0m\033[K\n"; \
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fi;
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cleanlib:
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@make -C $(LIBFT_DIR) clean
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fclean: clean fcleanlib
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@for file in $(NAME); do \
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if [ -e $$file ]; then \
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rm -f $$file ; \
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printf "\r\033[38;5;196m✗ fclean $$file\033[0m\033[K\n"; \
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fi; \
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done;
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fcleanlib: cleanlib
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@make -C $(LIBFT_DIR) fclean
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re: fclean all
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relib: fcleanlib $(LIBFT_LIB)
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.PHONY : fclean clean re relib cleanlib fcleanlib
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-include $(OBJS:.o=.d)
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33
nmap/includes/ft_ping.h
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33
nmap/includes/ft_ping.h
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/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* ft_ping.h :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: jhalford <jack@crans.org> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2017/04/22 14:10:24 by jhalford #+# #+# */
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/* Updated: 2017/04/22 15:52:07 by jhalford ### ########.fr */
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/* */
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/* ************************************************************************** */
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#ifndef FT_PING_H
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# define FT_PING_H
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# include "libft.h"
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# include <fcntl.h>
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# include <errno.h>
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# include <sys/socket.h>
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# include <resolv.h>
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# include <netdb.h>
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# include <netinet/in.h>
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# include <netinet/ip.h>
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# include <netinet/ip_icmp.h>
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#define PACKETSIZE 64
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struct s_packet
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{
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struct icmp icmp;
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char msg[PACKETSIZE-sizeof(struct icmp)];
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};
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#endif
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1
nmap/libft
Submodule
1
nmap/libft
Submodule
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@ -0,0 +1 @@
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Subproject commit 61ecc913bbc31dafab3fff2386e1cbfffd34596a
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146
nmap/srcs/ping.c
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146
nmap/srcs/ping.c
Normal file
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@ -0,0 +1,146 @@
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/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* main.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: jhalford <jack@crans.org> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2017/04/22 14:10:24 by jhalford #+# #+# */
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/* Updated: 2017/04/23 18:18:41 by jhalford ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "ft_ping.h"
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int g_pid=-1;
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unsigned short checksum(void *b, int len)
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{
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unsigned short *buf = b;
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unsigned int sum=0;
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unsigned short result;
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for (sum = 0; len > 1; len -= 2)
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sum += *buf++;
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if (len == 1)
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sum += *(unsigned char*)buf;
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sum = (sum >> 16) + (sum & 0xFFFF);
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sum += (sum >> 16);
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result = ~sum;
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return (result);
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}
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void display(void *buf, int bytes, struct sockaddr_in *addr)
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{
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int i;
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struct ip *ip = buf;
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struct icmp *icmp = buf + ip->ip_hl*4;
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printf("%d bytes from %s: ttl=%i\n",
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ip->ip_len, inet_ntoa(addr->sin_addr), ip->ip_ttl);
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printf("IPv%d: hrd-size=%d, pkt-size=%d, id=%d, frag-off=%d, protocol=%c\n, ttl=%i",
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ip->ip_v, ip->ip_hl, ip->ip_len, ip->ip_id, ip->ip_off, ip->ip_p, ip->ip_ttl);
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if (icmp->icmp_hun.ih_idseq.icd_id == g_pid)
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{
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printf("ICMP: type[%d/%d] checksum[%d] id[%d] seq[%d]\n",
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icmp->icmp_type, icmp->icmp_code, ntohs(icmp->icmp_cksum),
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icmp->icmp_hun.ih_idseq.icd_id, icmp->icmp_hun.ih_idseq.icd_seq);
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(void)bytes;
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}
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for (i=0; i < bytes; i++)
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{
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if ( !(i & 15) ) printf("\n%i: ", i);
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printf("%c ", ((char*)buf)[i]);
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}
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printf("\n");
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}
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void listener(struct sockaddr_in *addr)
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{
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int sd;
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struct sockaddr_in r_addr;
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int bytes;
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socklen_t len;
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unsigned char buf[1024];
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if ((sd = socket(PF_INET, SOCK_DGRAM, IPPROTO_ICMP)) < 0)
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{
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perror("socket");
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exit(0);
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}
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for (;;)
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{
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bzero(buf, sizeof(buf));
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len = sizeof(r_addr);
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bytes = recvfrom(sd, buf, sizeof(buf), 0, (struct sockaddr*)&r_addr, &len);
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if (bytes > 0)
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display(buf, bytes, addr);
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else
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perror("recvfrom");
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}
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}
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void ping(struct sockaddr_in *addr)
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{
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const int val;
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int i;
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int sd;
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int cnt;
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socklen_t len;
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struct s_packet pkt;
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struct sockaddr_in r_addr;
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if ((sd = socket(PF_INET, SOCK_DGRAM, IPPROTO_ICMP)) < 0)
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{
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perror("socket");
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return ;
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}
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if (setsockopt(sd, 0, IP_TTL, &val, sizeof(val)) != 0)
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perror("set TTL option");
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if (fcntl(sd, F_SETFL, O_NONBLOCK) != 0)
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perror("Request non blocking IO");
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cnt = 1;
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while (1)
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{
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len = sizeof(r_addr);
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recvfrom(sd, &pkt, sizeof(pkt), 0, (struct sockaddr*)&r_addr, &len);
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bzero(&pkt, sizeof(pkt));
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pkt.icmp.icmp_type = ICMP_ECHO;
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pkt.icmp.icmp_hun.ih_idseq.icd_id = g_pid;
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for (i=0; i < (int)sizeof(pkt.msg); i++)
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pkt.msg[i] = i+'0';
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pkt.msg[i] = 0;
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pkt.icmp.icmp_hun.ih_idseq.icd_seq = cnt++;
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pkt.icmp.icmp_cksum = checksum(&pkt, sizeof(pkt));
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if (sendto(sd, &pkt, sizeof(pkt), 0, (struct sockaddr*)addr, sizeof(*addr)) <= 0)
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perror("sendto");
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sleep(1);
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}
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}
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int main(int ac, char **av)
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{
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struct sockaddr_in *addr;
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struct addrinfo *result;
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if (ac != 2)
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{
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printf("usage: %s <addr>\n", av[0]);
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exit(1);
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}
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if (getaddrinfo(av[1], NULL, NULL, &result) != 0)
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{
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perror("getaddrinfo");
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exit(1);
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}
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addr = (struct sockaddr_in*)result->ai_addr;
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if (fork() == 0)
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{
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listener(addr);
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exit(0);
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}
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else
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ping(addr);
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wait(0);
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return (0);
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}
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