chore: re-indent code (linux style)

CMakeLists.txt

@@ -33,6 +33,9 @@ target_link_libraries(igmpgen ${LIBNET_LIBRARY})
 # Installation instructions
 install(TARGETS igmpgen DESTINATION bin)
 
+# Install the man page
+install(FILES misc/igmpgen.man.1 DESTINATION share/man/man1 RENAME igmpgen.1)
+
 # Include CPack for packaging
 include(InstallRequiredSystemLibraries)
 set(CPACK_RESOURCE_FILE_LICENSE "${CMAKE_CURRENT_SOURCE_DIR}/LICENSE.txt")

Makefile

@@ -0,0 +1,24 @@
+
+BUILD_DIR=_build
+
+all: build
+
+$(BUILD_DIR):
+	mkdir -p $(BUILD_DIR)
+	cmake -S . -B _build -D CMAKE_BUILD_TYPE=Debug
+
+build: | $(BUILD_DIR)
+	cmake --build _build
+
+debug: | $(BUILD_DIR)
+	gdb _build/igmpgen 
+
+run: | $(BUILD_DIR)
+	_build/igmpgen
+
+install: | $(BUILD_DIR)
+	cmake --install _build
+
+package: | $(BUILD_DIR)
+	make -C _build package
+

build.sh

@@ -1,5 +0,0 @@
-#!/bin/sh
-
-mkdir -p _build
-cmake -S . -B _build -D CMAKE_BUILD_TYPE=Debug
-cmake --build _build

misc/igmpgen.man.1

@@ -0,0 +1,86 @@
+.TH IGMPGEN 1 "Your Date Here" "Version Number Here" "IGMPGEN Manual"
+.SH NAME
+igmpgen \- IGMP packet generator
+
+.SH SYNOPSIS
+.B igmpgen
+[options]
+
+.SH DESCRIPTION
+.PP
+The
+.B igmpgen
+utility is used to generate IGMP (Internet Group Management Protocol) network packets.
+
+.SH OPTIONS
+.TP
+.B \-i <interface>
+Specify the network interface (e.g., eth0).
+
+.TP
+.B \-t <type>
+Specify the IGMP packet type and version (e.g., 1.query).
+
+.TP
+.B \-g <group>
+Specify the destination IGMP group (e.g., 224.0.0.1).
+
+.TP
+.B \-s <source>
+Specify the source IP and port (e.g., 192.168.1.1:1234).
+
+.TP
+.B \-d <destination>
+Specify the destination IP and port (e.g., 224.0.0.2:5678).
+
+.TP
+.B \-n <number>
+Specify delay between packets in seconds (optional).
+
+.SH AVAILABLE IGMP PACKET TYPES
+.PP
+The following IGMP packet types are available:
+.PP
+\- 1.query
+.br
+\- 1.report
+.br
+\- 1.dvmrp
+.br
+\- 2.query
+.br
+\- 2.report
+.br
+\- 2.leave
+.br
+\- 3.report
+
+.SH EXAMPLES
+.PP
+To generate a 1.query IGMP packet on eth0:
+.PP
+.nf
+\fB$ igmpgen -i eth0 -t 1.query\fR
+.fi
+
+.SH AUTHOR
+.PP
+Written by Your Name.
+
+.SH "SEE ALSO"
+.PP
+Related commands or documentation.
+
+.SH BUGS
+.PP
+No known bugs.
+
+.SH LICENSE
+.PP
+Specify license information or refer to the LICENSE file.
+
+.SH "REPORTING BUGS"
+.PP
+Provide information on how to report bugs.
+
+

run.sh

@@ -1,3 +0,0 @@
-#!/bin/sh
-
-gdb _build/igmpgen 

src/ipg_types.h

@@ -29,4 +29,3 @@ typedef struct {
 extern ipg_igmp_extra_t g_igmp_pkts[];
 
 #endif				/* IGP_TYPES_H */
-

src/main.c

@@ -18,28 +18,30 @@ typedef unsigned long           ulong;
 /* global table of IGMP packet types*/
 ipg_igmp_extra_t g_igmp_pkts[] = {
 	/* name,  type (or version+type), code */
-    { 1, "query",  0x11, 0, "224.0.0.1", 0 },
+	{1, "query", 0x11, 0, "224.0.0.1", 0},
-    { 1, "report", 0x12, 0, "224.0.0.1", 1 },
+	{1, "report", 0x12, 0, "224.0.0.1", 1},
-    { 1, "dvmrp",  0x13, 0, "224.0.0.1", 0 },
+	{1, "dvmrp", 0x13, 0, "224.0.0.1", 0},
-    { 2, "query",  0x11, 1, "224.0.0.1", 0 },
+	{2, "query", 0x11, 1, "224.0.0.1", 0},
-    { 2, "report", 0x16, 1, "224.0.0.2", 1 },
+	{2, "report", 0x16, 1, "224.0.0.2", 1},
-    { 2, "leave",  0x17, 1, "224.0.0.2", 0 },
+	{2, "leave", 0x17, 1, "224.0.0.2", 0},
-    { 3, "report", 0x22, 1, "224.0.0.22", 0 },
+	{3, "report", 0x22, 1, "224.0.0.22", 0},
 
 	/* Note: end of list (please keep) */
-    { 0, 0, 0, 0, 0, 0 },
+	{0, 0, 0, 0, 0, 0},
 };
 
 void usage(char *);
 
-ipg_igmp_extra_t * igmp_packet_type_find(u_int8_t igmp_version, char *igmp_request) {
+ipg_igmp_extra_t *igmp_packet_type_find(u_int8_t igmp_version,
+					char *igmp_request)
+{
 	ipg_igmp_extra_t *pkt_ptr;
 
 	pkt_ptr = g_igmp_pkts;
-    while(pkt_ptr->igmp_version || pkt_ptr->igmp_tag){
+	while (pkt_ptr->igmp_version || pkt_ptr->igmp_tag) {
 		// if ((strcasecmp(pkt_ptr->igmp_tag, optarg) == 0) 
 		if ((strcasecmp(pkt_ptr->igmp_tag, igmp_request) == 0)
-                && (igmp_version == pkt_ptr->igmp_version)){
+		    && (igmp_version == pkt_ptr->igmp_version)) {
 			return pkt_ptr;
 		}
 		pkt_ptr++;
@@ -69,7 +71,7 @@ int main(int argc, char **argv)
 
 	int ip_src_test = 1;
 	int ip_dst_test = 1;
-    int igmp_group_test =1;
+	int igmp_group_test = 1;
 
 	/* libnet stuff */
 	char neterr[LIBNET_ERRBUF_SIZE];
@@ -85,12 +87,10 @@ int main(int argc, char **argv)
 	printf("Detected options:\n");
 
 	/* Parsing command line */
-    while((c = getopt(argc, argv, "i:t:g:d:s:")) != EOF)
+	while ((c = getopt(argc, argv, "i:t:g:d:s:")) != EOF) {
-    {
+		switch (c) {
-        switch (c)
-        {
 		case 'i':
-                printf("  Net interface = [%s]\n",optarg);
+			printf("  Net interface = [%s]\n", optarg);
 			device = optarg;
 			break;
 
@@ -101,11 +101,12 @@ int main(int argc, char **argv)
 			}
 			*cp++ = 0;
 
-                igmp_version = (u_short)atoi(optarg);
+			igmp_version = (u_short) atoi(optarg);
 
 			pkt_ptr = igmp_packet_type_find(igmp_version, cp);
 			if (!pkt_ptr) {
-                    printf("ERROR: Packet type %d.%s not found!\n", igmp_version, cp);
+				printf("ERROR: Packet type %d.%s not found!\n",
+				       igmp_version, cp);
 				usage(argv[0]);
 				exit(1);
 			}
@@ -114,7 +115,8 @@ int main(int argc, char **argv)
 			igmp_code = pkt_ptr->igmp_code;
 			ip_dst_str = pkt_ptr->igmp_dst;
 			igmp_override = pkt_ptr->group_override_dst;
-                printf("  Packet = [%s] version [%d]\n", pkt_ptr->igmp_tag, igmp_version);
+			printf("  Packet = [%s] version [%d]\n",
+			       pkt_ptr->igmp_tag, igmp_version);
 			break;
 
 		case 'g':
@@ -135,27 +137,27 @@ int main(int argc, char **argv)
 			 *  just the IP address, and cp points to the port.
 			 */
 
-                if ((cp = strrchr(optarg, ':')))
+			if ((cp = strrchr(optarg, ':'))) {
-                {
 				*cp++ = 0;
-                    dst_prt = (u_short)atoi(cp);
+				dst_prt = (u_short) atoi(cp);
 			} else {
 				dst_prt = 0;
 			}
 			ip_dst_str = strdup(optarg);
-                printf("  Destination = ip [%s] port [%d]\n", ip_dst_str, dst_prt);
+			printf("  Destination = ip [%s] port [%d]\n",
+			       ip_dst_str, dst_prt);
 			break;
 
 		case 's':
-                if ((cp = strrchr(optarg, ':')))
+			if ((cp = strrchr(optarg, ':'))) {
-                {
 				*cp++ = 0;
-                    src_prt = (u_short)atoi(cp);
+				src_prt = (u_short) atoi(cp);
 			} else {
 				src_prt = 0;
 			}
 			ip_src_str = strdup(optarg);
-                printf("  Source = ip [%s] port [%d]\n", ip_src_str, src_prt);
+			printf("  Source = ip [%s] port [%d]\n", ip_src_str,
+			       src_prt);
 			break;
 
 		default:
@@ -164,15 +166,13 @@ int main(int argc, char **argv)
 		}
 	}
 
-    if (!igmp_group_str)
+	if (!igmp_group_str) {
-    {
 		usage(argv[0]);
 		fprintf(stderr, "ERROR: missing destination IGMP group\n");
 		exit(EXIT_FAILURE);
 	}
 
-    if (!device)
+	if (!device) {
-    {
 		usage(argv[0]);
 		fprintf(stderr, "ERROR: missing device\n");
 		exit(EXIT_FAILURE);
@@ -198,8 +198,7 @@ int main(int argc, char **argv)
 
 	/* Packet construction: IGMP */
 	printf("  Building IGMP content...\n");
-    ptag = libnet_build_igmp(
+	ptag = libnet_build_igmp(igmp_type,	// IGMP type
-        igmp_type,        // IGMP type
 				 igmp_code,	// IGMP code
 				 0,	// checksum
 				 0,	// group address
@@ -209,7 +208,8 @@ int main(int argc, char **argv)
 				 0	// ptag
 	    );
 	if (ptag == -1) {
-        fprintf(stderr, "Error building IGMP header: %s\n", libnet_geterror(netcontext));
+		fprintf(stderr, "Error building IGMP header: %s\n",
+			libnet_geterror(netcontext));
 		libnet_destroy(netcontext);
 		exit(EXIT_FAILURE);
 	}
@@ -218,7 +218,8 @@ int main(int argc, char **argv)
 
 	/* Send packet */
 	if (libnet_write(netcontext) == -1) {
-        fprintf(stderr, "Error sending packet: %s\n", libnet_geterror(netcontext));
+		fprintf(stderr, "Error sending packet: %s\n",
+			libnet_geterror(netcontext));
 	} else {
 		printf("Packet sent successfully.\n");
 	}
@@ -235,9 +236,9 @@ int main(int argc, char **argv)
 		ip_dst_str = igmp_group_str;
 	}
 
-    switch ( igmp_type ) {
+	switch (igmp_type) {
 	case 0x11:		// IGMP_MEMBERSHIP_QUERY
-            if (igmp_version == 2){
+		if (igmp_version == 2) {
 			// group specific
 		} else if (igmp_version == 1) {
 			// general
@@ -255,25 +256,27 @@ int main(int argc, char **argv)
 	}
 
 	if (ip_src_test
-            && !(ip_src = libnet_name2addr4(netcontext, ip_src_str, LIBNET_RESOLVE)))
+	    && !(ip_src =
-    {
+		 libnet_name2addr4(netcontext, ip_src_str, LIBNET_RESOLVE))) {
-        fprintf(stderr,"Bad source IP address: %s\n", ip_src_str);
+		fprintf(stderr, "Bad source IP address: %s\n", ip_src_str);
-        fprintf(stderr,"%s\n", libnet_geterror(netcontext));
+		fprintf(stderr, "%s\n", libnet_geterror(netcontext));
 		exit(1);
 	}
 
 	if (ip_dst_test
-            && !(ip_dst = libnet_name2addr4(netcontext, ip_dst_str, LIBNET_RESOLVE)))
+	    && !(ip_dst =
-    {
+		 libnet_name2addr4(netcontext, ip_dst_str, LIBNET_RESOLVE))) {
-        fprintf(stderr,"Bad destination IP address: %s\n", ip_dst_str);
+		fprintf(stderr, "Bad destination IP address: %s\n", ip_dst_str);
-        fprintf(stderr,"%s\n", libnet_geterror(netcontext));
+		fprintf(stderr, "%s\n", libnet_geterror(netcontext));
 		exit(1);
 	}
 
-    if (igmp_group_test && !(igmp_group = libnet_name2addr4(netcontext, igmp_group_str, LIBNET_RESOLVE)))
+	if (igmp_group_test
+	    && !(igmp_group =
+		 libnet_name2addr4(netcontext, igmp_group_str, LIBNET_RESOLVE)))
 	{
-        fprintf(stderr,"Bad group IP address: %s\n", optarg);
+		fprintf(stderr, "Bad group IP address: %s\n", optarg);
-        fprintf(stderr,"%s\n", libnet_geterror(netcontext));
+		fprintf(stderr, "%s\n", libnet_geterror(netcontext));
 		exit(1);
 	}
 
@@ -295,8 +298,7 @@ int main(int argc, char **argv)
 	   }
 	 */
 
-    ptag = libnet_build_igmp(
+	ptag = libnet_build_igmp(igmp_type,	// IGMP type 
-            igmp_type,              // IGMP type 
 				 igmp_code,	// IGMP code or TTL 
 				 0,	// checksum
 				 htonl(igmp_group),	// ip addr 
@@ -304,26 +306,26 @@ int main(int argc, char **argv)
 				 0,	// Packet payload length 
 				 netcontext,	// Ptr to libnet context
 				 0);	// Build a new packet header
-    if (ptag < 0)
+	if (ptag < 0) {
-    { 
+		fprintf(stderr,
-        fprintf(stderr, "Error while building IGMP header data (err %d)\n", ptag);
+			"Error while building IGMP header data (err %d)\n",
-        fprintf(stderr,"%s\n", libnet_geterror(netcontext));
+			ptag);
+		fprintf(stderr, "%s\n", libnet_geterror(netcontext));
 		exit(1);
 	}
 
-
 	u_int8_t ipopt[2];
 	ipopt[0] = IPOPT_RA;
 	ipopt[1] = 4;
-    ptag = libnet_build_ipv4_options(
+	ptag = libnet_build_ipv4_options(ipopt,	// options
-            ipopt,       // options
 					 2,	// options_s (length of option string)
 					 netcontext,	// libnet context
 					 0	// ptag
 	    );
-    if (ptag < 0)
+	if (ptag < 0) {
-    { 
+		fprintf(stderr,
-        fprintf(stderr, "Error while building IPv4 options data (err %d)\n", ptag);
+			"Error while building IPv4 options data (err %d)\n",
+			ptag);
 	}
 
 	ptag = libnet_build_ipv4(LIBNET_IPV4_H + LIBNET_IGMP_H,	// pkg size + data
@@ -340,23 +342,23 @@ int main(int argc, char **argv)
 				 netcontext,	// libnet context
 				 0	// build a new header
 	    );
-    if (ptag < 0)
+	if (ptag < 0) {
-    { 
+		fprintf(stderr,
-        fprintf(stderr, "Error while building IPv4 header data (err %d)\n", ptag);
+			"Error while building IPv4 header data (err %d)\n",
-        fprintf(stderr,"%s\n", libnet_geterror(netcontext));
+			ptag);
+		fprintf(stderr, "%s\n", libnet_geterror(netcontext));
 		exit(1);
 	}
 
 	printf("  done\n");	//IGMP content
 
 	c = libnet_write(netcontext);
-    if (c < 0)
+	if (c < 0) {
-    {
+		fprintf(stderr, "%s\n", libnet_geterror(netcontext));
-        fprintf(stderr,"%s\n", libnet_geterror(netcontext));
+	} else {
-    }
+		printf
-    else
+		    ("construction and injection completed, wrote all %d bytes\n",
-    {
+		     c);
-        printf("construction and injection completed, wrote all %d bytes\n", c);
 	}
 
 	/*

src/usage.c

@@ -11,20 +11,26 @@ void usage(const char *name)
 
 	fprintf(stderr, "Usage: %s [options]\n", basename(name));
 	fprintf(stderr, "\nOptions:\n");
-    fprintf(stderr, "  -i <interface>   Specify the network interface (e.g., eth0)\n");
+	fprintf(stderr,
-    fprintf(stderr, "  -t <type>        Specify the IGMP packet type and version (e.g., 1.query)\n");
+		"  -i <interface>   Specify the network interface (e.g., eth0)\n");
-    fprintf(stderr, "  -g <group>       Specify the destination IGMP group (e.g., 224.0.0.1)\n");
+	fprintf(stderr,
-    fprintf(stderr, "  -s <source>      Specify the source IP and port (e.g., 192.168.1.1:1234)\n");
+		"  -t <type>        Specify the IGMP packet type and version (e.g., 1.query)\n");
-    fprintf(stderr, "  -d <destination> Specify the destination IP and port (e.g., 224.0.0.2:5678)\n");
+	fprintf(stderr,
-    fprintf(stderr, "  -n <number>      Specify delay between packets in seconds (optional)\n");
+		"  -g <group>       Specify the destination IGMP group (e.g., 224.0.0.1)\n");
+	fprintf(stderr,
+		"  -s <source>      Specify the source IP and port (e.g., 192.168.1.1:1234)\n");
+	fprintf(stderr,
+		"  -d <destination> Specify the destination IP and port (e.g., 224.0.0.2:5678)\n");
+	fprintf(stderr,
+		"  -n <number>      Specify delay between packets in seconds (optional)\n");
 
 	fprintf(stderr, "\nAvailable IGMP packet types:\n");
 
 	pkt_ptr = g_igmp_pkts;
-    while(pkt_ptr->igmp_version || pkt_ptr->igmp_tag){
+	while (pkt_ptr->igmp_version || pkt_ptr->igmp_tag) {
-        fprintf(stderr," - %d.%s\n", pkt_ptr->igmp_version, pkt_ptr->igmp_tag);
+		fprintf(stderr, " - %d.%s\n", pkt_ptr->igmp_version,
+			pkt_ptr->igmp_tag);
 		pkt_ptr++;
 	}
 	fprintf(stderr, "\n");
 }
-