static void set_tunnel_proto(struct ip_tunnel_parm *p, int proto)
{
if (p->iph.protocol && p->iph.protocol != proto) {
- fprintf(stderr,"You managed to ask for more than one tunnel mode.\n");
+ fprintf(stderr,
+ "You managed to ask for more than one tunnel mode.\n");
exit(-1);
}
p->iph.protocol = proto;
static int parse_args(int argc, char **argv, int cmd, struct ip_tunnel_parm *p)
{
int count = 0;
- char medium[IFNAMSIZ];
+ const char *medium = NULL;
int isatap = 0;
memset(p, 0, sizeof(*p));
- memset(&medium, 0, sizeof(medium));
-
p->iph.version = 4;
p->iph.ihl = 5;
#ifndef IP_DF
set_tunnel_proto(p, IPPROTO_IPIP);
p->i_flags |= VTI_ISVTI;
} else {
- fprintf(stderr,"Unknown tunnel mode \"%s\"\n", *argv);
+ fprintf(stderr,
+ "Unknown tunnel mode \"%s\"\n", *argv);
exit(-1);
}
} else if (strcmp(*argv, "key") == 0) {
p->iph.frag_off = htons(IP_DF);
} else if (strcmp(*argv, "remote") == 0) {
NEXT_ARG();
- if (strcmp(*argv, "any"))
- p->iph.daddr = get_addr32(*argv);
- else
- p->iph.daddr = htonl(INADDR_ANY);
+ p->iph.daddr = get_addr32(*argv);
} else if (strcmp(*argv, "local") == 0) {
NEXT_ARG();
- if (strcmp(*argv, "any"))
- p->iph.saddr = get_addr32(*argv);
- else
- p->iph.saddr = htonl(INADDR_ANY);
+ p->iph.saddr = get_addr32(*argv);
} else if (strcmp(*argv, "dev") == 0) {
NEXT_ARG();
- strncpy(medium, *argv, IFNAMSIZ - 1);
+ medium = *argv;
} else if (strcmp(*argv, "ttl") == 0 ||
strcmp(*argv, "hoplimit") == 0 ||
strcmp(*argv, "hlim") == 0) {
__u8 uval;
+
NEXT_ARG();
if (strcmp(*argv, "inherit") != 0) {
if (get_u8(&uval, *argv, 0))
matches(*argv, "dsfield") == 0) {
char *dsfield;
__u32 uval;
+
NEXT_ARG();
dsfield = *argv;
strsep(&dsfield, "/");
p->iph.tos |= uval;
}
} else {
- if (strcmp(*argv, "name") == 0) {
+ if (strcmp(*argv, "name") == 0)
NEXT_ARG();
- } else if (matches(*argv, "help") == 0)
+ else if (matches(*argv, "help") == 0)
usage();
+
if (p->name[0])
duparg2("name", *argv);
- strncpy(p->name, *argv, IFNAMSIZ - 1);
+ if (get_ifname(p->name, *argv))
+ invarg("\"name\" not a valid ifname", *argv);
if (cmd == SIOCCHGTUNNEL && count == 0) {
- struct ip_tunnel_parm old_p;
- memset(&old_p, 0, sizeof(old_p));
+ struct ip_tunnel_parm old_p = {};
+
if (tnl_get_ioctl(*argv, &old_p))
return -1;
*p = old_p;
}
}
- if (medium[0]) {
+ if (medium) {
p->link = ll_name_to_index(medium);
- if (p->link == 0) {
- fprintf(stderr, "Cannot find device \"%s\"\n", medium);
- return -1;
- }
+ if (!p->link)
+ return nodev(medium);
}
if (p->i_key == 0 && IN_MULTICAST(ntohl(p->iph.daddr))) {
return -1;
}
- if (!(basedev = tnl_defname(&p))) {
- fprintf(stderr, "cannot determine tunnel mode (ipip, gre, vti or sit)\n");
+ basedev = tnl_defname(&p);
+ if (!basedev) {
+ fprintf(stderr,
+ "cannot determine tunnel mode (ipip, gre, vti or sit)\n");
return -1;
}
return tnl_del_ioctl(tnl_defname(&p) ? : p.name, p.name, &p);
}
-static void print_tunnel(struct ip_tunnel_parm *p)
+static void print_tunnel(const void *t)
{
- struct ip_tunnel_6rd ip6rd;
+ const struct ip_tunnel_parm *p = t;
+ struct ip_tunnel_6rd ip6rd = {};
char s1[1024];
char s2[1024];
- memset(&ip6rd, 0, sizeof(ip6rd));
-
/* Do not use format_host() for local addr,
* symbolic name will not be useful.
*/
printf("%s: %s/ip remote %s local %s",
p->name,
tnl_strproto(p->iph.protocol),
- p->iph.daddr ? format_host(AF_INET, 4, &p->iph.daddr, s1, sizeof(s1)) : "any",
- p->iph.saddr ? rt_addr_n2a(AF_INET, 4, &p->iph.saddr, s2, sizeof(s2)) : "any");
+ p->iph.daddr ? format_host_r(AF_INET, 4, &p->iph.daddr, s1, sizeof(s1)) : "any",
+ p->iph.saddr ? rt_addr_n2a_r(AF_INET, 4, &p->iph.saddr, s2, sizeof(s2)) : "any");
if (p->iph.protocol == IPPROTO_IPV6 && (p->i_flags & SIT_ISATAP)) {
- struct ip_tunnel_prl prl[16];
+ struct ip_tunnel_prl prl[16] = {};
int i;
- memset(prl, 0, sizeof(prl));
prl[0].datalen = sizeof(prl) - sizeof(prl[0]);
prl[0].addr = htonl(INADDR_ANY);
if (!tnl_prl_ioctl(SIOCGETPRL, p->name, prl))
- for (i = 1; i < sizeof(prl) / sizeof(prl[0]); i++)
- {
- if (prl[i].addr != htonl(INADDR_ANY)) {
- printf(" %s %s ",
- (prl[i].flags & PRL_DEFAULT) ? "pdr" : "pr",
- format_host(AF_INET, 4, &prl[i].addr, s1, sizeof(s1)));
+ for (i = 1; i < ARRAY_SIZE(prl); i++) {
+ if (prl[i].addr != htonl(INADDR_ANY)) {
+ printf(" %s %s ",
+ (prl[i].flags & PRL_DEFAULT) ? "pdr" : "pr",
+ format_host(AF_INET, 4, &prl[i].addr));
+ }
}
- }
}
if (p->link) {
const char *n = ll_index_to_name(p->link);
+
if (n)
printf(" dev %s", n);
}
if (p->iph.ttl)
- printf(" ttl %d", p->iph.ttl);
+ printf(" ttl %u", p->iph.ttl);
else
printf(" ttl inherit");
ip6rd.prefixlen);
if (ip6rd.relay_prefix) {
printf(" 6rd-relay_prefix %s/%u",
- format_host(AF_INET, 4, &ip6rd.relay_prefix, s1, sizeof(s1)),
+ format_host(AF_INET, 4, &ip6rd.relay_prefix),
ip6rd.relay_prefixlen);
}
}
printf("%s Checksum output packets.", _SL_);
}
-static int do_tunnels_list(struct ip_tunnel_parm *p)
+
+static void ip_tunnel_parm_initialize(const struct tnl_print_nlmsg_info *info)
{
- char buf[512];
- int err = -1;
- FILE *fp = fopen("/proc/net/dev", "r");
- if (fp == NULL) {
- perror("fopen");
- return -1;
- }
+ struct ip_tunnel_parm *p2 = info->p2;
- /* skip header lines */
- if (!fgets(buf, sizeof(buf), fp) ||
- !fgets(buf, sizeof(buf), fp)) {
- fprintf(stderr, "/proc/net/dev read error\n");
- goto end;
- }
+ memset(p2, 0, sizeof(*p2));
+}
- while (fgets(buf, sizeof(buf), fp) != NULL) {
- char name[IFNAMSIZ];
- int index, type;
- unsigned long rx_bytes, rx_packets, rx_errs, rx_drops,
- rx_fifo, rx_frame,
- tx_bytes, tx_packets, tx_errs, tx_drops,
- tx_fifo, tx_colls, tx_carrier, rx_multi;
- struct ip_tunnel_parm p1;
- char *ptr;
-
- buf[sizeof(buf) - 1] = 0;
- if ((ptr = strchr(buf, ':')) == NULL ||
- (*ptr++ = 0, sscanf(buf, "%s", name) != 1)) {
- fprintf(stderr, "Wrong format for /proc/net/dev. Giving up.\n");
- goto end;
- }
- if (sscanf(ptr, "%ld%ld%ld%ld%ld%ld%ld%*d%ld%ld%ld%ld%ld%ld%ld",
- &rx_bytes, &rx_packets, &rx_errs, &rx_drops,
- &rx_fifo, &rx_frame, &rx_multi,
- &tx_bytes, &tx_packets, &tx_errs, &tx_drops,
- &tx_fifo, &tx_colls, &tx_carrier) != 14)
- continue;
- if (p->name[0] && strcmp(p->name, name))
- continue;
- index = ll_name_to_index(name);
- if (index == 0)
- continue;
- type = ll_index_to_type(index);
- if (type == -1) {
- fprintf(stderr, "Failed to get type of \"%s\"\n", name);
- continue;
- }
- if (type != ARPHRD_TUNNEL && type != ARPHRD_IPGRE && type != ARPHRD_SIT)
- continue;
- memset(&p1, 0, sizeof(p1));
- if (tnl_get_ioctl(name, &p1))
- continue;
- if ((p->link && p1.link != p->link) ||
- (p->name[0] && strcmp(p1.name, p->name)) ||
- (p->iph.daddr && p1.iph.daddr != p->iph.daddr) ||
- (p->iph.saddr && p1.iph.saddr != p->iph.saddr) ||
- (p->i_key && p1.i_key != p->i_key))
- continue;
- print_tunnel(&p1);
- if (show_stats) {
- printf("%s", _SL_);
- printf("RX: Packets Bytes Errors CsumErrs OutOfSeq Mcasts%s", _SL_);
- printf(" %-10ld %-12ld %-6ld %-8ld %-8ld %-8ld%s",
- rx_packets, rx_bytes, rx_errs, rx_frame, rx_fifo, rx_multi, _SL_);
- printf("TX: Packets Bytes Errors DeadLoop NoRoute NoBufs%s", _SL_);
- printf(" %-10ld %-12ld %-6ld %-8ld %-8ld %-6ld",
- tx_packets, tx_bytes, tx_errs, tx_colls, tx_carrier, tx_drops);
- }
- printf("\n");
- }
- err = 0;
- end:
- fclose(fp);
- return err;
+static bool ip_tunnel_parm_match(const struct tnl_print_nlmsg_info *info)
+{
+ const struct ip_tunnel_parm *p1 = info->p1;
+ const struct ip_tunnel_parm *p2 = info->p2;
+
+ return ((!p1->link || p1->link == p2->link) &&
+ (!p1->name[0] || strcmp(p1->name, p2->name) == 0) &&
+ (!p1->iph.daddr || p1->iph.daddr == p2->iph.daddr) &&
+ (!p1->iph.saddr || p1->iph.saddr == p2->iph.saddr) &&
+ (!p1->i_key || p1->i_key == p2->i_key));
}
static int do_show(int argc, char **argv)
{
- struct ip_tunnel_parm p;
+ struct ip_tunnel_parm p, p1;
const char *basedev;
- ll_init_map(&rth);
if (parse_args(argc, argv, SIOCGETTUNNEL, &p) < 0)
return -1;
- if (!(basedev = tnl_defname(&p)))
- return do_tunnels_list(&p);
+ basedev = tnl_defname(&p);
+ if (!basedev) {
+ struct tnl_print_nlmsg_info info = {
+ .p1 = &p,
+ .p2 = &p1,
+ .init = ip_tunnel_parm_initialize,
+ .match = ip_tunnel_parm_match,
+ .print = print_tunnel,
+ };
+
+ return do_tunnels_list(&info);
+ }
if (tnl_get_ioctl(p.name[0] ? p.name : basedev, &p))
return -1;
print_tunnel(&p);
- printf("\n");
+ fputc('\n', stdout);
return 0;
}
static int do_prl(int argc, char **argv)
{
- struct ip_tunnel_prl p;
+ struct ip_tunnel_prl p = {};
int count = 0;
- int devname = 0;
int cmd = 0;
- char medium[IFNAMSIZ];
-
- memset(&p, 0, sizeof(p));
- memset(&medium, 0, sizeof(medium));
+ const char *medium = NULL;
while (argc > 0) {
if (strcmp(*argv, "prl-default") == 0) {
count++;
} else if (strcmp(*argv, "dev") == 0) {
NEXT_ARG();
- strncpy(medium, *argv, IFNAMSIZ-1);
- devname++;
+ if (check_ifname(*argv))
+ invarg("\"dev\" not a valid ifname", *argv);
+ medium = *argv;
} else {
- fprintf(stderr,"Invalid PRL parameter \"%s\"\n", *argv);
+ fprintf(stderr,
+ "Invalid PRL parameter \"%s\"\n", *argv);
exit(-1);
}
if (count > 1) {
- fprintf(stderr,"One PRL entry at a time\n");
+ fprintf(stderr,
+ "One PRL entry at a time\n");
exit(-1);
}
argc--; argv++;
}
- if (devname == 0) {
+ if (!medium) {
fprintf(stderr, "Must specify device\n");
exit(-1);
}
static int do_6rd(int argc, char **argv)
{
- struct ip_tunnel_6rd ip6rd;
- int devname = 0;
+ struct ip_tunnel_6rd ip6rd = {};
int cmd = 0;
- char medium[IFNAMSIZ];
+ const char *medium = NULL;
inet_prefix prefix;
- memset(&ip6rd, 0, sizeof(ip6rd));
- memset(&medium, 0, sizeof(medium));
-
while (argc > 0) {
if (strcmp(*argv, "6rd-prefix") == 0) {
NEXT_ARG();
cmd = SIOCDEL6RD;
} else if (strcmp(*argv, "dev") == 0) {
NEXT_ARG();
- strncpy(medium, *argv, IFNAMSIZ-1);
- devname++;
+ if (check_ifname(*argv))
+ invarg("\"dev\" not a valid ifname", *argv);
+ medium = *argv;
} else {
- fprintf(stderr,"Invalid 6RD parameter \"%s\"\n", *argv);
+ fprintf(stderr,
+ "Invalid 6RD parameter \"%s\"\n", *argv);
exit(-1);
}
argc--; argv++;
}
- if (devname == 0) {
+ if (!medium) {
fprintf(stderr, "Must specify device\n");
exit(-1);
}
return tnl_6rd_ioctl(cmd, medium, &ip6rd);
}
-static int tunnel_mode_is_ipv6(char *tunnel_mode) {
- static const char *ipv6_modes[] = {
+static int tunnel_mode_is_ipv6(char *tunnel_mode)
+{
+ static const char * const ipv6_modes[] = {
"ipv6/ipv6", "ip6ip6",
"vti6",
"ip/ipv6", "ipv4/ipv6", "ipip6", "ip4ip6",
};
int i;
- for (i = 0; i < sizeof(ipv6_modes) / sizeof(ipv6_modes[0]); i++) {
+ for (i = 0; i < ARRAY_SIZE(ipv6_modes); i++) {
if (strcmp(ipv6_modes[i], tunnel_mode) == 0)
return 1;
}