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Diffstat (limited to 'networking/libiproute/iptunnel.c')
-rw-r--r--networking/libiproute/iptunnel.c117
1 files changed, 75 insertions, 42 deletions
diff --git a/networking/libiproute/iptunnel.c b/networking/libiproute/iptunnel.c
index 3327b27..b12bceb 100644
--- a/networking/libiproute/iptunnel.c
+++ b/networking/libiproute/iptunnel.c
@@ -137,6 +137,23 @@ static void parse_args(int argc, char **argv, int cmd, struct ip_tunnel_parm *p)
{
int count = 0;
char medium[IFNAMSIZ];
+ static const char * const keywords[] = {
+ "mode", "ipip", "ip/ip", "gre", "gre/ip", "sit", "ipv6/ip",
+ "key", "ikey", "okey", "seq", "iseq", "oseq",
+ "csum", "icsum", "ocsum", "nopmtudisc", "pmtudisc",
+ "remote", "any", "local", "dev",
+ "ttl", "inherit", "tos", "dsfield",
+ "name", NULL
+ };
+ enum {
+ ARG_mode, ARG_ipip, ARG_ip_ip, ARG_gre, ARG_gre_ip, ARG_sit, ARG_ip6_ip,
+ ARG_key, ARG_ikey, ARG_okey, ARG_seq, ARG_iseq, ARG_oseq,
+ ARG_csum, ARG_icsum, ARG_ocsum, ARG_nopmtudisc, ARG_pmtudisc,
+ ARG_remote, ARG_any, ARG_local, ARG_dev,
+ ARG_ttl, ARG_inherit, ARG_tos, ARG_dsfield,
+ ARG_name
+ };
+ int key;
memset(p, 0, sizeof(*p));
memset(&medium, 0, sizeof(medium));
@@ -148,22 +165,24 @@ static void parse_args(int argc, char **argv, int cmd, struct ip_tunnel_parm *p)
p->iph.frag_off = htons(IP_DF);
while (argc > 0) {
- if (strcmp(*argv, "mode") == 0) {
+ key = index_in_str_array(keywords, *argv);
+ if (key == ARG_mode) {
NEXT_ARG();
- if (strcmp(*argv, "ipip") == 0 ||
- strcmp(*argv, "ip/ip") == 0) {
+ key = index_in_str_array(keywords, *argv);
+ if (key == ARG_ipip ||
+ key == ARG_ip_ip) {
if (p->iph.protocol && p->iph.protocol != IPPROTO_IPIP) {
bb_error_msg_and_die("you managed to ask for more than one tunnel mode");
}
p->iph.protocol = IPPROTO_IPIP;
- } else if (strcmp(*argv, "gre") == 0 ||
- strcmp(*argv, "gre/ip") == 0) {
+ } else if (key == ARG_gre ||
+ key == ARG_gre_ip) {
if (p->iph.protocol && p->iph.protocol != IPPROTO_GRE) {
bb_error_msg_and_die("you managed to ask for more than one tunnel mode");
}
p->iph.protocol = IPPROTO_GRE;
- } else if (strcmp(*argv, "sit") == 0 ||
- strcmp(*argv, "ipv6/ip") == 0) {
+ } else if (key == ARG_sit ||
+ key == ARG_ip6_ip) {
if (p->iph.protocol && p->iph.protocol != IPPROTO_IPV6) {
bb_error_msg_and_die("you managed to ask for more than one tunnel mode");
}
@@ -171,7 +190,7 @@ static void parse_args(int argc, char **argv, int cmd, struct ip_tunnel_parm *p)
} else {
bb_error_msg_and_die("cannot guess tunnel mode");
}
- } else if (strcmp(*argv, "key") == 0) {
+ } else if (key == ARG_key) {
unsigned uval;
NEXT_ARG();
p->i_flags |= GRE_KEY;
@@ -184,7 +203,7 @@ static void parse_args(int argc, char **argv, int cmd, struct ip_tunnel_parm *p)
}
p->i_key = p->o_key = htonl(uval);
}
- } else if (strcmp(*argv, "ikey") == 0) {
+ } else if (key == ARG_ikey) {
unsigned uval;
NEXT_ARG();
p->i_flags |= GRE_KEY;
@@ -196,7 +215,7 @@ static void parse_args(int argc, char **argv, int cmd, struct ip_tunnel_parm *p)
}
p->i_key = htonl(uval);
}
- } else if (strcmp(*argv, "okey") == 0) {
+ } else if (key == ARG_okey) {
unsigned uval;
NEXT_ARG();
p->o_flags |= GRE_KEY;
@@ -208,57 +227,61 @@ static void parse_args(int argc, char **argv, int cmd, struct ip_tunnel_parm *p)
}
p->o_key = htonl(uval);
}
- } else if (strcmp(*argv, "seq") == 0) {
+ } else if (key == ARG_seq) {
p->i_flags |= GRE_SEQ;
p->o_flags |= GRE_SEQ;
- } else if (strcmp(*argv, "iseq") == 0) {
+ } else if (key == ARG_iseq) {
p->i_flags |= GRE_SEQ;
- } else if (strcmp(*argv, "oseq") == 0) {
+ } else if (key == ARG_oseq) {
p->o_flags |= GRE_SEQ;
- } else if (strcmp(*argv, "csum") == 0) {
+ } else if (key == ARG_csum) {
p->i_flags |= GRE_CSUM;
p->o_flags |= GRE_CSUM;
- } else if (strcmp(*argv, "icsum") == 0) {
+ } else if (key == ARG_icsum) {
p->i_flags |= GRE_CSUM;
- } else if (strcmp(*argv, "ocsum") == 0) {
+ } else if (key == ARG_ocsum) {
p->o_flags |= GRE_CSUM;
- } else if (strcmp(*argv, "nopmtudisc") == 0) {
+ } else if (key == ARG_nopmtudisc) {
p->iph.frag_off = 0;
- } else if (strcmp(*argv, "pmtudisc") == 0) {
+ } else if (key == ARG_pmtudisc) {
p->iph.frag_off = htons(IP_DF);
- } else if (strcmp(*argv, "remote") == 0) {
+ } else if (key == ARG_remote) {
NEXT_ARG();
- if (strcmp(*argv, "any"))
+ key = index_in_str_array(keywords, *argv);
+ if (key == ARG_any)
p->iph.daddr = get_addr32(*argv);
- } else if (strcmp(*argv, "local") == 0) {
+ } else if (key == ARG_local) {
NEXT_ARG();
- if (strcmp(*argv, "any"))
+ key = index_in_str_array(keywords, *argv);
+ if (key == ARG_any)
p->iph.saddr = get_addr32(*argv);
- } else if (strcmp(*argv, "dev") == 0) {
+ } else if (key == ARG_dev) {
NEXT_ARG();
strncpy(medium, *argv, IFNAMSIZ-1);
- } else if (strcmp(*argv, "ttl") == 0) {
+ } else if (key == ARG_ttl) {
unsigned uval;
NEXT_ARG();
- if (strcmp(*argv, "inherit") != 0) {
+ key = index_in_str_array(keywords, *argv);
+ if (key != ARG_inherit) {
if (get_unsigned(&uval, *argv, 0))
invarg(*argv, "TTL");
if (uval > 255)
invarg(*argv, "TTL must be <=255");
p->iph.ttl = uval;
}
- } else if (strcmp(*argv, "tos") == 0 ||
- matches(*argv, "dsfield") == 0) {
+ } else if (key == ARG_tos ||
+ key == ARG_dsfield) {
uint32_t uval;
NEXT_ARG();
- if (strcmp(*argv, "inherit") != 0) {
+ key = index_in_str_array(keywords, *argv);
+ if (key != ARG_inherit) {
if (rtnl_dsfield_a2n(&uval, *argv))
invarg(*argv, "TOS");
p->iph.tos = uval;
} else
p->iph.tos = 1;
} else {
- if (strcmp(*argv, "name") == 0) {
+ if (key == ARG_name) {
NEXT_ARG();
}
if (p->name[0])
@@ -438,7 +461,7 @@ static void do_tunnels_list(struct ip_tunnel_parm *p)
ptr = strchr(buf, ':');
if (ptr == NULL ||
(*ptr++ = 0, sscanf(buf, "%s", name) != 1)) {
- bb_error_msg("wrong format of /proc/net/dev. Sorry");
+ bb_error_msg("wrong format of /proc/net/dev");
return;
}
if (sscanf(ptr, "%lu%lu%lu%lu%lu%lu%lu%*d%lu%lu%lu%lu%lu%lu%lu",
@@ -503,19 +526,29 @@ static int do_show(int argc, char **argv)
/* Return value becomes exitcode. It's okay to not return at all */
int do_iptunnel(int argc, char **argv)
{
+ static const char * const keywords[] = {
+ "add", "change", "delete", "show", "list", "lst", NULL
+ };
+ enum {ARG_add = 1, ARG_change, ARG_del, ARG_show, ARG_list, ARG_lst};
+ smalluint key = 4; /* show */
if (argc > 0) {
- if (matches(*argv, "add") == 0)
- return do_add(SIOCADDTUNNEL, argc-1, argv+1);
- if (matches(*argv, "change") == 0)
- return do_add(SIOCCHGTUNNEL, argc-1, argv+1);
- if (matches(*argv, "del") == 0)
- return do_del(argc-1, argv+1);
- if (matches(*argv, "show") == 0 ||
- matches(*argv, "lst") == 0 ||
- matches(*argv, "list") == 0)
- return do_show(argc-1, argv+1);
+ key = index_in_substr_array(keywords, *argv) +1;
+ --argc;
+ ++argv;
} else
return do_show(0, NULL);
-
- bb_error_msg_and_die("command \"%s\" is unknown", *argv);
+ if (key < ARG_add)
+ bail:
+ bb_error_msg_and_die(bb_msg_invalid_arg, *argv, applet_name);
+
+ if (key == ARG_add)
+ return do_add(SIOCADDTUNNEL, argc, argv);
+ if (key == ARG_change)
+ return do_add(SIOCCHGTUNNEL, argc, argv);
+ if (key == ARG_del)
+ return do_del(argc, argv);
+ if (key == ARG_show || key == ARG_list || key == ARG_lst)
+ return do_show(argc, argv);
+ /* be gentle to gcc; avoid warning about non returning */
+ goto bail; /* never reached */
}
generated by cgit v1.1 at 2024-11-06 11:37:43 +0000