23642076215

Committed 27 Mar 2026 10:31AM UTC coverage: 87.863% (-0.3%) from 88.152%

Build # 23642076215

Build Type

Pull #463

github

Committed by

web-flow

Commit Message

Merge 57545c9a9 into fd87284ca

Pull Request Pull Request #463: New option --oiface for outgoing interface

Coverage Stats

49 of 59 new or added lines in 3 files covered. (83.05%)

2 existing lines in 1 file now uncovered.

1665 of 1895 relevant lines covered (87.86%)

346.68 hits per line

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86.08

/src/socket6.c

/*
 * fping: fast-ping, file-ping, favorite-ping, funky-ping
 *
 *   Ping a list of target hosts in a round robin fashion.
 *   A better ping overall.
 *
 * fping website:  http://www.fping.org
 *
 * Current maintainer of fping: David Schweikert
 * Please send suggestions and patches to: david@schweikert.ch
 *
 *
 * Original author:  Roland Schemers  <schemers@stanford.edu>
 * IPv6 Support:     Jeroen Massar    <jeroen@unfix.org / jeroen@ipng.nl>
 * Improved main loop: David Schweikert <david@schweikert.ch>
 * Debian Merge, TOS settings: Tobi Oetiker <tobi@oetiker.ch>
 * Bugfixes, byte order & senseful seq.-numbers: Stephan Fuhrmann (stephan.fuhrmann AT 1und1.de)
 *
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by Stanford University.  The name of the University may not be used
 * to endorse or promote products derived from this software without
 * specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#include "config.h"
#include "fping.h"
#include "flags.h"

#include <fcntl.h>
#include <netdb.h>
#include <netinet/in.h>
#include <net/if.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>

#include <netinet/icmp6.h>

char* ping_buffer_ipv6 = 0;
size_t ping_pkt_size_ipv6;

/* Interface index for outgoing packets (0 = not set, use routing table) */
static int outgoing_iface_idx_ipv6 = 0;

int open_ping_socket_ipv6(int *socktype)
{
    struct protoent* proto;
    int s;

    /* confirm that ICMP6 is available on this machine */
    if ((proto = getprotobyname("ipv6-icmp")) == NULL)
        crash_and_burn("ipv6-icmp: unknown protocol");

    /* create raw socket for ICMP6 calls (ping) */
    *socktype = SOCK_RAW;
    s = socket(AF_INET6, *socktype, proto->p_proto);
    if (s < 0) {
        /* try non-privileged icmp6 (works on Mac OSX without privileges, for example) */
        *socktype = SOCK_DGRAM;
        s = socket(AF_INET6, *socktype, proto->p_proto);
        if (s < 0) {
            return -1;
        }
    } else {
        /* receive only ICMP6 messages relevant for fping on raw socket */
        struct icmp6_filter recv_filter;

        ICMP6_FILTER_SETBLOCKALL(&recv_filter);
        ICMP6_FILTER_SETPASS(ICMP6_ECHO_REPLY, &recv_filter);
        ICMP6_FILTER_SETPASS(ICMP6_DST_UNREACH, &recv_filter);
        ICMP6_FILTER_SETPASS(ICMP6_PACKET_TOO_BIG, &recv_filter);
        ICMP6_FILTER_SETPASS(ICMP6_TIME_EXCEEDED, &recv_filter);
        ICMP6_FILTER_SETPASS(ICMP6_PARAM_PROB, &recv_filter);

        if (setsockopt(s, IPPROTO_ICMPV6, ICMP6_FILTER, &recv_filter, sizeof(recv_filter))) {
            errno_crash_and_burn("cannot set icmp6 message type filter");
        }
    }

    /* Make sure that we use non-blocking IO */
    {
        int flags;

        if ((flags = fcntl(s, F_GETFL, 0)) < 0)
            perror("fcntl");

        if (fcntl(s, F_SETFL, flags | O_NONBLOCK) < 0)
            perror("fcntl");
    }

    return s;
}

void socket_set_outgoing_iface_ipv6(int s, const char *iface_name)
{
    unsigned int idx = if_nametoindex(iface_name);
    if (idx == 0) {
        fprintf(stderr, "fping: unknown interface '%s'\n", iface_name);
        exit(1);
    }
    outgoing_iface_idx_ipv6 = (int)idx;

    int on = 1;
    if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVPKTINFO, &on, sizeof(on)) < 0) {
        perror("setsockopt IPV6_RECVPKTINFO");
        exit(1);
    }
}

void init_ping_buffer_ipv6(size_t ping_data_size)
{
    /* allocate ping buffer */
    ping_pkt_size_ipv6 = ping_data_size + sizeof(struct icmp6_hdr);
    ping_buffer_ipv6 = (char*)calloc(1, ping_pkt_size_ipv6);
    if (!ping_buffer_ipv6)
        crash_and_burn("can't malloc ping packet");
}

void socket_set_src_addr_ipv6(int s, struct in6_addr* src_addr, int *ident)
{
    struct sockaddr_in6 sa;
    socklen_t len = sizeof(sa);

    memset(&sa, 0, sizeof(sa));
    sa.sin6_family = AF_INET6;
    sa.sin6_addr = *src_addr;
    if (bind(s, (struct sockaddr*)&sa, sizeof(sa)) < 0)
        errno_crash_and_burn("cannot bind source address");

    if (ident) {
        memset(&sa, 0, len);
        if (getsockname(s, (struct sockaddr *)&sa, &len) < 0)
            errno_crash_and_burn("can't get ICMP6 socket identity");

        if (sa.sin6_port)
            *ident = sa.sin6_port;
    }
}

int socket_sendto_ping_ipv6(int s, struct sockaddr* saddr, socklen_t saddr_len, uint16_t icmp_seq_nr, uint16_t icmp_id_nr)
{
    struct icmp6_hdr* icp;
    int n;

    icp = (struct icmp6_hdr*)ping_buffer_ipv6;
    icp->icmp6_type = ICMP6_ECHO_REQUEST;
    icp->icmp6_code = 0;
    icp->icmp6_seq = htons(icmp_seq_nr);
    icp->icmp6_id = icmp_id_nr;

    if (opt_random_data_on) {
        for (n = sizeof(struct icmp6_hdr); n < ping_pkt_size_ipv6; ++n) {
            ping_buffer_ipv6[n] = random() & 0xFF;
        }
    }

    icp->icmp6_cksum = 0; /* The IPv6 stack calculates the checksum for us... */

    if (outgoing_iface_idx_ipv6 > 0) {
        struct iovec iov = {
            .iov_base = icp,
            .iov_len  = ping_pkt_size_ipv6
        };

        char cmsg_buf[CMSG_SPACE(sizeof(struct in6_pktinfo))];
        memset(cmsg_buf, 0, sizeof(cmsg_buf));

        struct msghdr msg = {
            .msg_name       = saddr,
            .msg_namelen    = saddr_len,
            .msg_iov        = &iov,
            .msg_iovlen     = 1,
            .msg_control    = cmsg_buf,
            .msg_controllen = sizeof(cmsg_buf),
            .msg_flags      = 0
        };

        struct cmsghdr *cmsg = CMSG_FIRSTHDR(&msg);
        cmsg->cmsg_level = IPPROTO_IPV6;
        cmsg->cmsg_type  = IPV6_PKTINFO;
        cmsg->cmsg_len   = CMSG_LEN(sizeof(struct in6_pktinfo));

        struct in6_pktinfo *pktinfo = (struct in6_pktinfo *)CMSG_DATA(cmsg);
        memset(pktinfo, 0, sizeof(*pktinfo));
        pktinfo->ipi6_ifindex = outgoing_iface_idx_ipv6;

        n = sendmsg(s, &msg, 0);
    } else {
        n = sendto(s, icp, ping_pkt_size_ipv6, 0, saddr, saddr_len);
    }

    return n;
}

1	/*
2	* fping: fast-ping, file-ping, favorite-ping, funky-ping
3	*
4	* Ping a list of target hosts in a round robin fashion.
5	* A better ping overall.
6	*
7	* fping website: http://www.fping.org
8	*
9	* Current maintainer of fping: David Schweikert
10	* Please send suggestions and patches to: david@schweikert.ch
11	*
12	*
13	* Original author: Roland Schemers <schemers@stanford.edu>
14	* IPv6 Support: Jeroen Massar <jeroen@unfix.org / jeroen@ipng.nl>
15	* Improved main loop: David Schweikert <david@schweikert.ch>
16	* Debian Merge, TOS settings: Tobi Oetiker <tobi@oetiker.ch>
17	* Bugfixes, byte order & senseful seq.-numbers: Stephan Fuhrmann (stephan.fuhrmann AT 1und1.de)
18	*
19	*
20	* Redistribution and use in source and binary forms are permitted
21	* provided that the above copyright notice and this paragraph are
22	* duplicated in all such forms and that any documentation,
23	* advertising materials, and other materials related to such
24	* distribution and use acknowledge that the software was developed
25	* by Stanford University. The name of the University may not be used
26	* to endorse or promote products derived from this software without
27	* specific prior written permission.
28	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
29	* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
30	* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
31	*/
32
33	#include "config.h"
34	#include "fping.h"
35	#include "flags.h"
36
37	#include <fcntl.h>
38	#include <netdb.h>
39	#include <netinet/in.h>
40	#include <net/if.h>
41	#include <stdio.h>
42	#include <stdlib.h>
43	#include <string.h>
44	#include <sys/socket.h>
45
46	#include <netinet/icmp6.h>
47
48	char* ping_buffer_ipv6 = 0;
49	size_t ping_pkt_size_ipv6;
50
51	/* Interface index for outgoing packets (0 = not set, use routing table) */
52	static int outgoing_iface_idx_ipv6 = 0;
53
54	int open_ping_socket_ipv6(int *socktype)	881✔
55	{
56	struct protoent* proto;
57	int s;
58
59	/* confirm that ICMP6 is available on this machine */
60	if ((proto = getprotobyname("ipv6-icmp")) == NULL)	881✔
61	crash_and_burn("ipv6-icmp: unknown protocol");	×
62
63	/* create raw socket for ICMP6 calls (ping) */
64	*socktype = SOCK_RAW;	881✔
65	s = socket(AF_INET6, *socktype, proto->p_proto);	881✔
66	if (s < 0) {	881✔
67	/* try non-privileged icmp6 (works on Mac OSX without privileges, for example) */
68	*socktype = SOCK_DGRAM;	12✔
69	s = socket(AF_INET6, *socktype, proto->p_proto);	12✔
70	if (s < 0) {	12✔
71	return -1;	×
72	}
73	} else {
74	/* receive only ICMP6 messages relevant for fping on raw socket */
75	struct icmp6_filter recv_filter;
76
77	ICMP6_FILTER_SETBLOCKALL(&recv_filter);	869✔
78	ICMP6_FILTER_SETPASS(ICMP6_ECHO_REPLY, &recv_filter);	869✔
79	ICMP6_FILTER_SETPASS(ICMP6_DST_UNREACH, &recv_filter);	869✔
80	ICMP6_FILTER_SETPASS(ICMP6_PACKET_TOO_BIG, &recv_filter);	869✔
81	ICMP6_FILTER_SETPASS(ICMP6_TIME_EXCEEDED, &recv_filter);	869✔
82	ICMP6_FILTER_SETPASS(ICMP6_PARAM_PROB, &recv_filter);	869✔
83
84	if (setsockopt(s, IPPROTO_ICMPV6, ICMP6_FILTER, &recv_filter, sizeof(recv_filter))) {	869✔
85	errno_crash_and_burn("cannot set icmp6 message type filter");	×
86	}
87	}
88
89	/* Make sure that we use non-blocking IO */
90	{
91	int flags;
92
93	if ((flags = fcntl(s, F_GETFL, 0)) < 0)	881✔
94	perror("fcntl");	×
95
96	if (fcntl(s, F_SETFL, flags \| O_NONBLOCK) < 0)	881✔
97	perror("fcntl");	×
98	}
99
100	return s;	881✔
101	}	239✔
102
103	void socket_set_outgoing_iface_ipv6(int s, const char *iface_name)	4✔
104	{
105	unsigned int idx = if_nametoindex(iface_name);	4✔
106	if (idx == 0) {	4✔
NEW 107	fprintf(stderr, "fping: unknown interface '%s'\n", iface_name);	×
NEW 108	exit(1);	×
109	}
110	outgoing_iface_idx_ipv6 = (int)idx;	4✔
111
112	int on = 1;	4✔
113	if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVPKTINFO, &on, sizeof(on)) < 0) {	4✔
NEW 114	perror("setsockopt IPV6_RECVPKTINFO");	×
NEW 115	exit(1);	×
116	}
117	}	4✔
118
119	void init_ping_buffer_ipv6(size_t ping_data_size)	392✔
120	{
121	/* allocate ping buffer */
122	ping_pkt_size_ipv6 = ping_data_size + sizeof(struct icmp6_hdr);	392✔
123	ping_buffer_ipv6 = (char*)calloc(1, ping_pkt_size_ipv6);	392✔
124	if (!ping_buffer_ipv6)	392✔
125	crash_and_burn("can't malloc ping packet");	×
126	}	392✔
127
128	void socket_set_src_addr_ipv6(int s, struct in6_addr* src_addr, int *ident)	16✔
129	{
130	struct sockaddr_in6 sa;
131	socklen_t len = sizeof(sa);	16✔
132
133	memset(&sa, 0, sizeof(sa));	16✔
134	sa.sin6_family = AF_INET6;	16✔
135	sa.sin6_addr = *src_addr;	16✔
136	if (bind(s, (struct sockaddr*)&sa, sizeof(sa)) < 0)	16✔
137	errno_crash_and_burn("cannot bind source address");	2✔
138
139	if (ident) {	14✔
140	memset(&sa, 0, len);	12✔
141	if (getsockname(s, (struct sockaddr *)&sa, &len) < 0)	12✔
142	errno_crash_and_burn("can't get ICMP6 socket identity");	×
143
144	if (sa.sin6_port)	12✔
145	*ident = sa.sin6_port;	12✔
146	}
147	}	14✔
148
149	int socket_sendto_ping_ipv6(int s, struct sockaddr* saddr, socklen_t saddr_len, uint16_t icmp_seq_nr, uint16_t icmp_id_nr)	123✔
150	{
151	struct icmp6_hdr* icp;
152	int n;
153
154	icp = (struct icmp6_hdr*)ping_buffer_ipv6;	123✔
155	icp->icmp6_type = ICMP6_ECHO_REQUEST;	123✔
156	icp->icmp6_code = 0;	123✔
157	icp->icmp6_seq = htons(icmp_seq_nr);	123✔
158	icp->icmp6_id = icmp_id_nr;	123✔
159
160	if (opt_random_data_on) {	123✔
161	for (n = sizeof(struct icmp6_hdr); n < ping_pkt_size_ipv6; ++n) {	342✔
162	ping_buffer_ipv6[n] = random() & 0xFF;	336✔
163	}
164	}
165
166	icp->icmp6_cksum = 0; /* The IPv6 stack calculates the checksum for us... */	123✔
167
168	if (outgoing_iface_idx_ipv6 > 0) {	123✔
169	struct iovec iov = {	2✔
170	.iov_base = icp,
171	.iov_len = ping_pkt_size_ipv6
172	};
173
174	char cmsg_buf[CMSG_SPACE(sizeof(struct in6_pktinfo))];
175	memset(cmsg_buf, 0, sizeof(cmsg_buf));	2✔
176
177	struct msghdr msg = {	2✔
178	.msg_name = saddr,
179	.msg_namelen = saddr_len,
180	.msg_iov = &iov,
181	.msg_iovlen = 1,
182	.msg_control = cmsg_buf,
183	.msg_controllen = sizeof(cmsg_buf),
184	.msg_flags = 0
185	};
186
187	struct cmsghdr *cmsg = CMSG_FIRSTHDR(&msg);	2✔
188	cmsg->cmsg_level = IPPROTO_IPV6;	2✔
189	cmsg->cmsg_type = IPV6_PKTINFO;	2✔
190	cmsg->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo));	2✔
191
192	struct in6_pktinfo pktinfo = (struct in6_pktinfo )CMSG_DATA(cmsg);	2✔
193	memset(pktinfo, 0, sizeof(*pktinfo));	2✔
194	pktinfo->ipi6_ifindex = outgoing_iface_idx_ipv6;	2✔
195
196	n = sendmsg(s, &msg, 0);	2✔
197	} else {
198	n = sendto(s, icp, ping_pkt_size_ipv6, 0, saddr, saddr_len);	121✔
199	}
200
201	return n;	123✔
202	}

schweikert / fping / 23642076215

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