ifupdown: strlen(NULL) is a no-no, fixed. Also few micro-optimizations
This commit is contained in:
Denis Vlasenko
parent
6dca70a049
commit
fcfe834d50
@ -25,11 +25,11 @@
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#define EUNDEFVAR 10002
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#define EUNBALPER 10000
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#ifdef CONFIG_FEATURE_IFUPDOWN_MAPPING
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#if ENABLE_FEATURE_IFUPDOWN_MAPPING
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#define MAX_INTERFACE_LENGTH 10
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#endif
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#define debug_noise(fmt, args...)
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#define debug_noise(args...) /*fprintf(stderr, args)*/
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/* Forward declaration */
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struct interface_defn_t;
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@ -109,7 +109,7 @@ static char *startup_PATH;
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#if ENABLE_FEATURE_IFUPDOWN_IPV4 || ENABLE_FEATURE_IFUPDOWN_IPV6
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#ifdef CONFIG_FEATURE_IFUPDOWN_IP
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#if ENABLE_FEATURE_IFUPDOWN_IP
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static unsigned count_bits(unsigned a)
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{
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@ -184,10 +184,10 @@ static char *get_var(const char *id, size_t idlen, struct interface_defn_t *ifd)
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static char *parse(const char *command, struct interface_defn_t *ifd)
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{
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char *result = NULL;
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size_t old_pos[MAX_OPT_DEPTH] = { 0 };
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int okay[MAX_OPT_DEPTH] = { 1 };
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int opt_depth = 1;
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char *result = xstrdup("");
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while (*command) {
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switch (*command) {
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@ -245,10 +245,10 @@ static char *parse(const char *command, struct interface_defn_t *ifd)
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if (varvalue) {
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addstr(&result, varvalue, strlen(varvalue));
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} else {
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#ifdef CONFIG_FEATURE_IFUPDOWN_IP
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#if ENABLE_FEATURE_IFUPDOWN_IP
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/* Sigh... Add a special case for 'ip' to convert from
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* dotted quad to bit count style netmasks. */
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if (strncmp(command, "bnmask", 6)==0) {
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if (strncmp(command, "bnmask", 6) == 0) {
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unsigned res;
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varvalue = get_var("netmask", 7, ifd);
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if (varvalue && (res = count_netmask_bits(varvalue)) > 0) {
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@ -290,7 +290,7 @@ static int execute(const char *command, struct interface_defn_t *ifd, execfn *ex
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int ret;
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out = parse(command, ifd);
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if (!out) {
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if (!out || !out[0]) {
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return 0;
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}
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ret = (*exec)(out);
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@ -303,10 +303,10 @@ static int execute(const char *command, struct interface_defn_t *ifd, execfn *ex
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}
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#endif
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#ifdef CONFIG_FEATURE_IFUPDOWN_IPV6
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#if ENABLE_FEATURE_IFUPDOWN_IPV6
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static int loopback_up6(struct interface_defn_t *ifd, execfn *exec)
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{
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#ifdef CONFIG_FEATURE_IFUPDOWN_IP
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#if ENABLE_FEATURE_IFUPDOWN_IP
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int result;
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result = execute("ip addr add ::1 dev %iface%", ifd, exec);
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result += execute("ip link set %iface% up", ifd, exec);
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@ -318,7 +318,7 @@ static int loopback_up6(struct interface_defn_t *ifd, execfn *exec)
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static int loopback_down6(struct interface_defn_t *ifd, execfn *exec)
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{
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#ifdef CONFIG_FEATURE_IFUPDOWN_IP
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#if ENABLE_FEATURE_IFUPDOWN_IP
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return execute("ip link set %iface% down", ifd, exec);
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#else
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return execute("ifconfig %iface% del ::1", ifd, exec);
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@ -328,36 +328,37 @@ static int loopback_down6(struct interface_defn_t *ifd, execfn *exec)
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static int static_up6(struct interface_defn_t *ifd, execfn *exec)
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{
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int result;
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#ifdef CONFIG_FEATURE_IFUPDOWN_IP
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result = execute("ip addr add %address%/%netmask% dev %iface% [[label %label%]]", ifd, exec);
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result += execute("ip link set [[mtu %mtu%]] [[address %hwaddress%]] %iface% up", ifd, exec);
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result += execute("[[ ip route add ::/0 via %gateway% ]]", ifd, exec);
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#if ENABLE_FEATURE_IFUPDOWN_IP
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result = execute("ip addr add %address%/%netmask% dev %iface%[[ label %label%]]", ifd, exec);
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result += execute("ip link set[[ mtu %mtu%]][[ address %hwaddress%]] %iface% up", ifd, exec);
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/* Was: "[[ ip ....%gateway% ]]". Removed extra spaces w/o checking */
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result += execute("[[ip route add ::/0 via %gateway%]]", ifd, exec);
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#else
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result = execute("ifconfig %iface% [[media %media%]] [[hw %hwaddress%]] [[mtu %mtu%]] up", ifd, exec);
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result = execute("ifconfig %iface%[[ media %media%]][[ hw %hwaddress%]][[ mtu %mtu%]] up", ifd, exec);
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result += execute("ifconfig %iface% add %address%/%netmask%", ifd, exec);
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result += execute("[[ route -A inet6 add ::/0 gw %gateway% ]]", ifd, exec);
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result += execute("[[route -A inet6 add ::/0 gw %gateway%]]", ifd, exec);
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#endif
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return ((result == 3) ? 3 : 0);
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}
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static int static_down6(struct interface_defn_t *ifd, execfn *exec)
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{
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#ifdef CONFIG_FEATURE_IFUPDOWN_IP
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#if ENABLE_FEATURE_IFUPDOWN_IP
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return execute("ip link set %iface% down", ifd, exec);
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#else
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return execute("ifconfig %iface% down", ifd, exec);
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#endif
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}
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#ifdef CONFIG_FEATURE_IFUPDOWN_IP
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#if ENABLE_FEATURE_IFUPDOWN_IP
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static int v4tunnel_up(struct interface_defn_t *ifd, execfn *exec)
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{
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int result;
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result = execute("ip tunnel add %iface% mode sit remote "
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"%endpoint% [[local %local%]] [[ttl %ttl%]]", ifd, exec);
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"%endpoint%[[ local %local%]][[ ttl %ttl%]]", ifd, exec);
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result += execute("ip link set %iface% up", ifd, exec);
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result += execute("ip addr add %address%/%netmask% dev %iface%", ifd, exec);
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result += execute("[[ ip route add ::/0 via %gateway% ]]", ifd, exec);
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result += execute("[[ip route add ::/0 via %gateway%]]", ifd, exec);
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return ((result == 4) ? 4 : 0);
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}
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@ -368,7 +369,7 @@ static int v4tunnel_down(struct interface_defn_t * ifd, execfn * exec)
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#endif
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static const struct method_t methods6[] = {
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#ifdef CONFIG_FEATURE_IFUPDOWN_IP
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#if ENABLE_FEATURE_IFUPDOWN_IP
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{ "v4tunnel", v4tunnel_up, v4tunnel_down, },
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#endif
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{ "static", static_up6, static_down6, },
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@ -380,12 +381,12 @@ static const struct address_family_t addr_inet6 = {
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sizeof(methods6) / sizeof(struct method_t),
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methods6
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};
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#endif /* CONFIG_FEATURE_IFUPDOWN_IPV6 */
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#endif /* FEATURE_IFUPDOWN_IPV6 */
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#ifdef CONFIG_FEATURE_IFUPDOWN_IPV4
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#if ENABLE_FEATURE_IFUPDOWN_IPV4
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static int loopback_up(struct interface_defn_t *ifd, execfn *exec)
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{
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#ifdef CONFIG_FEATURE_IFUPDOWN_IP
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#if ENABLE_FEATURE_IFUPDOWN_IP
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int result;
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result = execute("ip addr add 127.0.0.1/8 dev %iface%", ifd, exec);
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result += execute("ip link set %iface% up", ifd, exec);
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@ -397,7 +398,7 @@ static int loopback_up(struct interface_defn_t *ifd, execfn *exec)
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static int loopback_down(struct interface_defn_t *ifd, execfn *exec)
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{
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#ifdef CONFIG_FEATURE_IFUPDOWN_IP
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#if ENABLE_FEATURE_IFUPDOWN_IP
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int result;
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result = execute("ip addr flush dev %iface%", ifd, exec);
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result += execute("ip link set %iface% down", ifd, exec);
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@ -410,21 +411,21 @@ static int loopback_down(struct interface_defn_t *ifd, execfn *exec)
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static int static_up(struct interface_defn_t *ifd, execfn *exec)
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{
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int result;
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#ifdef CONFIG_FEATURE_IFUPDOWN_IP
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result = execute("ip addr add %address%/%bnmask% [[broadcast %broadcast%]] "
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"dev %iface% [[peer %pointopoint%]] [[label %label%]]", ifd, exec);
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result += execute("ip link set [[mtu %mtu%]] [[address %hwaddress%]] %iface% up", ifd, exec);
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result += execute("[[ ip route add default via %gateway% dev %iface% ]]", ifd, exec);
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#if ENABLE_FEATURE_IFUPDOWN_IP
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result = execute("ip addr add %address%/%bnmask%[[ broadcast %broadcast%]] "
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"dev %iface%[[ peer %pointopoint%]][[ label %label%]]", ifd, exec);
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result += execute("ip link set[[ mtu %mtu%]][[ address %hwaddress%]] %iface% up", ifd, exec);
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result += execute("[[ip route add default via %gateway% dev %iface%]]", ifd, exec);
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return ((result == 3) ? 3 : 0);
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#else
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/* ifconfig said to set iface up before it processes hw %hwaddress%,
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* which then of course fails. Thus we run two separate ifconfig */
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result = execute("ifconfig %iface% [[hw %hwaddress%]] [[media %media%]] [[mtu %mtu%]] up",
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result = execute("ifconfig %iface%[[ hw %hwaddress%]][[ media %media%]][[ mtu %mtu%]] up",
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ifd, exec);
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result += execute("ifconfig %iface% %address% netmask %netmask% "
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"[[broadcast %broadcast%]] [[pointopoint %pointopoint%]] ",
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result += execute("ifconfig %iface% %address% netmask %netmask%"
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"[[ broadcast %broadcast%]][[ pointopoint %pointopoint%]] ",
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ifd, exec);
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result += execute("[[ route add default gw %gateway% %iface% ]]", ifd, exec);
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result += execute("[[route add default gw %gateway% %iface%]]", ifd, exec);
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return ((result == 3) ? 3 : 0);
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#endif
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}
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@ -432,17 +433,17 @@ static int static_up(struct interface_defn_t *ifd, execfn *exec)
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static int static_down(struct interface_defn_t *ifd, execfn *exec)
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{
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int result;
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#ifdef CONFIG_FEATURE_IFUPDOWN_IP
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#if ENABLE_FEATURE_IFUPDOWN_IP
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result = execute("ip addr flush dev %iface%", ifd, exec);
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result += execute("ip link set %iface% down", ifd, exec);
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#else
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result = execute("[[ route del default gw %gateway% %iface% ]]", ifd, exec);
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result = execute("[[route del default gw %gateway% %iface%]]", ifd, exec);
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result += execute("ifconfig %iface% down", ifd, exec);
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#endif
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return ((result == 2) ? 2 : 0);
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}
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#ifndef CONFIG_APP_UDHCPC
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#if !ENABLE_APP_UDHCPC
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struct dhcp_client_t
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{
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const char *name;
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@ -452,11 +453,11 @@ struct dhcp_client_t
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static const struct dhcp_client_t ext_dhcp_clients[] = {
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{ "udhcpc",
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"udhcpc -R -n -p /var/run/udhcpc.%iface%.pid -i %iface% [[-H %hostname%]] [[-c %clientid%]] [[-s %script%]]",
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"udhcpc -R -n -p /var/run/udhcpc.%iface%.pid -i %iface%[[ -H %hostname%]][[ -c %clientid%]][[ -s %script%]]",
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"kill -TERM `cat /var/run/udhcpc.%iface%.pid` 2>/dev/null",
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},
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{ "pump",
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"pump -i %iface% [[-h %hostname%]] [[-l %leasehours%]]",
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"pump -i %iface%[[ -h %hostname%]][[ -l %leasehours%]]",
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"pump -i %iface% -k",
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},
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{ "dhclient",
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@ -464,7 +465,7 @@ static const struct dhcp_client_t ext_dhcp_clients[] = {
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"kill -9 `cat /var/run/dhclient.%iface%.pid` 2>/dev/null",
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},
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{ "dhcpcd",
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"dhcpcd [[-h %hostname%]] [[-i %vendor%]] [[-I %clientid%]] [[-l %leasetime%]] %iface%",
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"dhcpcd[[ -h %hostname%]][[ -i %vendor%]][[ -I %clientid%]][[ -l %leasetime%]] %iface%",
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"dhcpcd -k %iface%",
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},
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};
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@ -472,9 +473,9 @@ static const struct dhcp_client_t ext_dhcp_clients[] = {
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static int dhcp_up(struct interface_defn_t *ifd, execfn *exec)
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{
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#ifdef CONFIG_APP_UDHCPC
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#if ENABLE_APP_UDHCPC
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return execute("udhcpc -R -n -p /var/run/udhcpc.%iface%.pid "
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"-i %iface% [[-H %hostname%]] [[-c %clientid%]] [[-s %script%]]",
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"-i %iface%[[ -H %hostname%]][[ -c %clientid%]][[ -s %script%]]",
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ifd, exec);
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#else
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int i, nclients = sizeof(ext_dhcp_clients) / sizeof(ext_dhcp_clients[0]);
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@ -489,7 +490,7 @@ static int dhcp_up(struct interface_defn_t *ifd, execfn *exec)
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static int dhcp_down(struct interface_defn_t *ifd, execfn *exec)
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{
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#ifdef CONFIG_APP_UDHCPC
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#if ENABLE_APP_UDHCPC
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return execute("kill -TERM "
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"`cat /var/run/udhcpc.%iface%.pid` 2>/dev/null", ifd, exec);
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#else
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@ -510,30 +511,30 @@ static int manual_up_down(struct interface_defn_t *ifd, execfn *exec)
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static int bootp_up(struct interface_defn_t *ifd, execfn *exec)
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{
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return execute("bootpc [[--bootfile %bootfile%]] --dev %iface% "
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"[[--server %server%]] [[--hwaddr %hwaddr%]] "
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return execute("bootpc[[ --bootfile %bootfile%]] --dev %iface%"
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"[[ --server %server%]][[ --hwaddr %hwaddr%]] "
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"--returniffail --serverbcast", ifd, exec);
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}
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static int ppp_up(struct interface_defn_t *ifd, execfn *exec)
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{
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return execute("pon [[%provider%]]", ifd, exec);
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return execute("pon[[ %provider%]]", ifd, exec);
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}
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static int ppp_down(struct interface_defn_t *ifd, execfn *exec)
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{
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return execute("poff [[%provider%]]", ifd, exec);
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return execute("poff[[ %provider%]]", ifd, exec);
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}
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static int wvdial_up(struct interface_defn_t *ifd, execfn *exec)
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{
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return execute("/sbin/start-stop-daemon --start -x /usr/bin/wvdial "
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"-p /var/run/wvdial.%iface% -b -m -- [[ %provider% ]]", ifd, exec);
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return execute("start-stop-daemon --start -x wvdial "
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"-p /var/run/wvdial.%iface% -b -m --[[ %provider%]]", ifd, exec);
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}
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static int wvdial_down(struct interface_defn_t *ifd, execfn *exec)
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{
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return execute("/sbin/start-stop-daemon --stop -x /usr/bin/wvdial "
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return execute("start-stop-daemon --stop -x wvdial "
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"-p /var/run/wvdial.%iface% -s 2", ifd, exec);
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}
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@ -553,7 +554,7 @@ static const struct address_family_t addr_inet = {
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methods
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};
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#endif /* ifdef CONFIG_FEATURE_IFUPDOWN_IPV4 */
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#endif /* if ENABLE_FEATURE_IFUPDOWN_IPV4 */
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static char *next_word(char **buf)
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{
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@ -633,7 +634,7 @@ static const llist_t *find_list_string(const llist_t *list, const char *string)
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static struct interfaces_file_t *read_interfaces(const char *filename)
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{
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#ifdef CONFIG_FEATURE_IFUPDOWN_MAPPING
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#if ENABLE_FEATURE_IFUPDOWN_MAPPING
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struct mapping_defn_t *currmap = NULL;
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#endif
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struct interface_defn_t *currif = NULL;
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@ -658,7 +659,7 @@ static struct interfaces_file_t *read_interfaces(const char *filename)
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}
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if (strcmp(firstword, "mapping") == 0) {
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#ifdef CONFIG_FEATURE_IFUPDOWN_MAPPING
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#if ENABLE_FEATURE_IFUPDOWN_MAPPING
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currmap = xzalloc(sizeof(struct mapping_defn_t));
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while ((firstword = next_word(&buf_ptr)) != NULL) {
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@ -686,10 +687,10 @@ static struct interfaces_file_t *read_interfaces(const char *filename)
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currently_processing = MAPPING;
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} else if (strcmp(firstword, "iface") == 0) {
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static const struct address_family_t *const addr_fams[] = {
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#ifdef CONFIG_FEATURE_IFUPDOWN_IPV4
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#if ENABLE_FEATURE_IFUPDOWN_IPV4
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&addr_inet,
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#endif
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#ifdef CONFIG_FEATURE_IFUPDOWN_IPV6
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#if ENABLE_FEATURE_IFUPDOWN_IPV6
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&addr_inet6,
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#endif
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NULL
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@ -802,7 +803,7 @@ static struct interfaces_file_t *read_interfaces(const char *filename)
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currif->n_options++;
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break;
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case MAPPING:
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#ifdef CONFIG_FEATURE_IFUPDOWN_MAPPING
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#if ENABLE_FEATURE_IFUPDOWN_MAPPING
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if (strcmp(firstword, "script") == 0) {
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if (currmap->script != NULL) {
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bb_error_msg("duplicate script in mapping \"%s\"", buf);
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@ -908,9 +909,9 @@ static int doit(char *str)
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fflush(NULL);
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switch (child = fork()) {
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case -1: /* failure */
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case -1: /* failure */
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return 0;
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case 0: /* child */
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case 0: /* child */
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execle(DEFAULT_SHELL, DEFAULT_SHELL, "-c", str, NULL, __myenviron);
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exit(127);
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}
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@ -941,13 +942,14 @@ static int execute_all(struct interface_defn_t *ifd, const char *opt)
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return 1;
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}
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static int check(char *str) {
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static int check(char *str)
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{
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return str != NULL;
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}
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static int iface_up(struct interface_defn_t *iface)
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{
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if (!iface->method->up(iface,check)) return -1;
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if (!iface->method->up(iface, check)) return -1;
|
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set_environ(iface, "start");
|
||||
if (!execute_all(iface, "pre-up")) return 0;
|
||||
if (!iface->method->up(iface, doit)) return 0;
|
||||
@ -965,7 +967,7 @@ static int iface_down(struct interface_defn_t *iface)
|
||||
return 1;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_FEATURE_IFUPDOWN_MAPPING
|
||||
#if ENABLE_FEATURE_IFUPDOWN_MAPPING
|
||||
static int popen2(FILE **in, FILE **out, char *command, ...)
|
||||
{
|
||||
va_list ap;
|
||||
@ -1069,7 +1071,7 @@ static char *run_mapping(char *physical, struct mapping_defn_t * map)
|
||||
|
||||
return logical;
|
||||
}
|
||||
#endif /* CONFIG_FEATURE_IFUPDOWN_MAPPING */
|
||||
#endif /* FEATURE_IFUPDOWN_MAPPING */
|
||||
|
||||
static llist_t *find_iface_state(llist_t *state_list, const char *iface)
|
||||
{
|
||||
@ -1088,8 +1090,6 @@ static llist_t *find_iface_state(llist_t *state_list, const char *iface)
|
||||
|
||||
int ifupdown_main(int argc, char **argv)
|
||||
{
|
||||
static const char statefile[] = "/var/run/ifstate";
|
||||
|
||||
int (*cmds)(struct interface_defn_t *) = NULL;
|
||||
struct interfaces_file_t *defn;
|
||||
llist_t *state_list = NULL;
|
||||
@ -1097,26 +1097,25 @@ int ifupdown_main(int argc, char **argv)
|
||||
const char *interfaces = "/etc/network/interfaces";
|
||||
int any_failures = 0;
|
||||
|
||||
cmds = iface_down;
|
||||
if (applet_name[2] == 'u') {
|
||||
/* ifup command */
|
||||
cmds = iface_up;
|
||||
} else {
|
||||
/* ifdown command */
|
||||
cmds = iface_down;
|
||||
}
|
||||
|
||||
getopt32(argc, argv, OPTION_STR, &interfaces);
|
||||
if (argc - optind > 0) {
|
||||
if (DO_ALL) bb_show_usage();
|
||||
} else
|
||||
} else {
|
||||
if (!DO_ALL) bb_show_usage();
|
||||
}
|
||||
|
||||
debug_noise("reading %s file:\n", interfaces);
|
||||
defn = read_interfaces(interfaces);
|
||||
debug_noise("\ndone reading %s\n\n", interfaces);
|
||||
|
||||
if (!defn) {
|
||||
exit(EXIT_FAILURE);
|
||||
return EXIT_FAILURE;
|
||||
}
|
||||
|
||||
startup_PATH = getenv("PATH");
|
||||
@ -1179,7 +1178,7 @@ int ifupdown_main(int argc, char **argv)
|
||||
}
|
||||
}
|
||||
|
||||
#ifdef CONFIG_FEATURE_IFUPDOWN_MAPPING
|
||||
#if ENABLE_FEATURE_IFUPDOWN_MAPPING
|
||||
if ((cmds == iface_up) && !NO_MAPPINGS) {
|
||||
struct mapping_defn_t *currmap;
|
||||
|
||||
@ -1198,7 +1197,6 @@ int ifupdown_main(int argc, char **argv)
|
||||
}
|
||||
#endif
|
||||
|
||||
|
||||
iface_list = defn->ifaces;
|
||||
while (iface_list) {
|
||||
currif = (struct interface_defn_t *) iface_list->data;
|
||||
@ -1208,16 +1206,16 @@ int ifupdown_main(int argc, char **argv)
|
||||
okay = 1;
|
||||
currif->iface = iface;
|
||||
|
||||
debug_noise("\nConfiguring interface %s (%s)\n", liface, currif->address_family->name);
|
||||
debug_noise("\nZ Configuring interface %s (%s)\n", liface, currif->address_family->name);
|
||||
|
||||
/* Call the cmds function pointer, does either iface_up() or iface_down() */
|
||||
cmds_ret = cmds(currif);
|
||||
if (cmds_ret == -1) {
|
||||
bb_error_msg("don't seem to have all the variables for %s/%s",
|
||||
liface, currif->address_family->name);
|
||||
any_failures += 1;
|
||||
any_failures = 1;
|
||||
} else if (cmds_ret == 0) {
|
||||
any_failures += 1;
|
||||
any_failures = 1;
|
||||
}
|
||||
|
||||
currif->iface = oldiface;
|
||||
@ -1230,7 +1228,7 @@ int ifupdown_main(int argc, char **argv)
|
||||
|
||||
if (!okay && !FORCE) {
|
||||
bb_error_msg("ignoring unknown interface %s", liface);
|
||||
any_failures += 1;
|
||||
any_failures = 1;
|
||||
} else {
|
||||
llist_t *iface_state = find_iface_state(state_list, iface);
|
||||
|
||||
@ -1251,9 +1249,9 @@ int ifupdown_main(int argc, char **argv)
|
||||
|
||||
/* Actually write the new state */
|
||||
if (!NO_ACT) {
|
||||
FILE *state_fp = NULL;
|
||||
FILE *state_fp;
|
||||
|
||||
state_fp = xfopen(statefile, "w");
|
||||
state_fp = xfopen("/var/run/ifstate", "w");
|
||||
while (state_list) {
|
||||
if (state_list->data) {
|
||||
fputs(state_list->data, state_fp);
|
||||
@ -1264,7 +1262,5 @@ int ifupdown_main(int argc, char **argv)
|
||||
fclose(state_fp);
|
||||
}
|
||||
|
||||
if (any_failures)
|
||||
return 1;
|
||||
return 0;
|
||||
return any_failures;
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user