X-Git-Url: https://git.archive.openwrt.org/?p=project%2Fnetifd.git;a=blobdiff_plain;f=system-linux.c;h=9d2e92f22b4fa05ed49fdacb42acab5e34685744;hp=3175d922b1b6638a454c4b1581611807776cbd79;hb=57419bcad1d86c41e906ce2adda33516881cb9f1;hpb=05b414d194e99d2f06c4325e2e5d856bec922eac diff --git a/system-linux.c b/system-linux.c index 3175d92..9d2e92f 100644 --- a/system-linux.c +++ b/system-linux.c @@ -1,6 +1,8 @@ /* * netifd - network interface daemon * Copyright (C) 2012 Felix Fietkau + * Copyright (C) 2013 Jo-Philipp Wich + * Copyright (C) 2013 Steven Barth * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 @@ -31,6 +33,7 @@ #include #include #include +#include #include #include @@ -396,6 +399,11 @@ static bool check_route(struct nlmsghdr *hdr, int ifindex) return *(int *)RTA_DATA(tb[RTA_OIF]) == ifindex; } +static bool check_rule(struct nlmsghdr *hdr, int ifindex) +{ + return true; +} + static int cb_clear_event(struct nl_msg *msg, void *arg) { struct clear_data *clr = arg; @@ -418,16 +426,26 @@ static int cb_clear_event(struct nl_msg *msg, void *arg) cb = check_route; break; + case RTM_GETRULE: + type = RTM_DELRULE; + if (hdr->nlmsg_type != RTM_NEWRULE) + return NL_SKIP; + + cb = check_rule; + break; default: return NL_SKIP; } - if (!cb(hdr, clr->dev->ifindex)) + if (!cb(hdr, clr->dev ? clr->dev->ifindex : 0)) return NL_SKIP; - D(SYSTEM, "Remove %s from device %s\n", - type == RTM_DELADDR ? "an address" : "a route", - clr->dev->ifname); + if (type == RTM_DELRULE) + D(SYSTEM, "Remove a rule\n"); + else + D(SYSTEM, "Remove %s from device %s\n", + type == RTM_DELADDR ? "an address" : "a route", + clr->dev->ifname); memcpy(nlmsg_hdr(clr->msg), hdr, hdr->nlmsg_len); hdr = nlmsg_hdr(clr->msg); hdr->nlmsg_type = type; @@ -472,6 +490,7 @@ system_if_clear_entries(struct device *dev, int type, int af) clr.type = type; switch (type) { case RTM_GETADDR: + case RTM_GETRULE: clr.size = sizeof(struct rtgenmsg); break; case RTM_GETROUTE: @@ -562,6 +581,10 @@ int system_bridge_addbr(struct device *bridge, struct bridge_config *cfg) system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_snooping", bridge->ifname, cfg->igmp_snoop ? "1" : "0"); + args[0] = BRCTL_SET_BRIDGE_PRIORITY; + args[1] = cfg->priority; + system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args); + if (cfg->flags & BRIDGE_OPT_AGEING_TIME) { args[0] = BRCTL_SET_AGEING_TIME; args[1] = sec_to_jiffies(cfg->ageing_time); @@ -867,6 +890,7 @@ static int system_addr(struct device *dev, struct device_addr *addr, int cmd) { bool v4 = ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET4); int alen = v4 ? 4 : 16; + unsigned int flags = 0; struct ifaddrmsg ifa = { .ifa_family = (alen == 4) ? AF_INET : AF_INET6, .ifa_prefixlen = addr->mask, @@ -874,8 +898,10 @@ static int system_addr(struct device *dev, struct device_addr *addr, int cmd) }; struct nl_msg *msg; + if (cmd == RTM_NEWADDR) + flags |= NLM_F_CREATE | NLM_F_REPLACE; - msg = nlmsg_alloc_simple(cmd, 0); + msg = nlmsg_alloc_simple(cmd, flags); if (!msg) return -1; @@ -886,6 +912,27 @@ static int system_addr(struct device *dev, struct device_addr *addr, int cmd) nla_put_u32(msg, IFA_BROADCAST, addr->broadcast); if (addr->point_to_point) nla_put_u32(msg, IFA_ADDRESS, addr->point_to_point); + } else { + time_t now = system_get_rtime(); + struct ifa_cacheinfo cinfo = {0xffffffffU, 0xffffffffU, 0, 0}; + + if (addr->preferred_until) { + int preferred = addr->preferred_until - now; + if (preferred < 0) + preferred = 0; + + cinfo.ifa_prefered = preferred; + } + + if (addr->valid_until) { + int valid = addr->valid_until - now; + if (valid <= 0) + return -1; + + cinfo.ifa_valid = valid; + } + + nla_put(msg, IFA_CACHEINFO, sizeof(cinfo), &cinfo); } return system_rtnl_call(msg); @@ -906,7 +953,6 @@ static int system_rt(struct device *dev, struct device_route *route, int cmd) int alen = ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16; bool have_gw; unsigned int flags = 0; - int ifindex = dev->ifindex; if (alen == 4) have_gw = !!route->nexthop.in.s_addr; @@ -919,19 +965,27 @@ static int system_rt(struct device *dev, struct device_route *route, int cmd) unsigned char scope = (cmd == RTM_DELROUTE) ? RT_SCOPE_NOWHERE : (have_gw) ? RT_SCOPE_UNIVERSE : RT_SCOPE_LINK; + unsigned int table = (route->flags & DEVROUTE_TABLE) ? route->table : RT_TABLE_MAIN; + struct rtmsg rtm = { .rtm_family = (alen == 4) ? AF_INET : AF_INET6, .rtm_dst_len = route->mask, - .rtm_table = RT_TABLE_MAIN, + .rtm_table = (table < 256) ? table : RT_TABLE_UNSPEC, .rtm_protocol = (route->flags & DEVADDR_KERNEL) ? RTPROT_KERNEL : RTPROT_STATIC, .rtm_scope = scope, .rtm_type = (cmd == RTM_DELROUTE) ? 0: RTN_UNICAST, }; struct nl_msg *msg; - if (cmd == RTM_NEWROUTE) + if (cmd == RTM_NEWROUTE) { flags |= NLM_F_CREATE | NLM_F_REPLACE; + if (!dev) { // Add null-route + rtm.rtm_scope = RT_SCOPE_UNIVERSE; + rtm.rtm_type = RTN_UNREACHABLE; + } + } + msg = nlmsg_alloc_simple(cmd, flags); if (!msg) return -1; @@ -947,7 +1001,11 @@ static int system_rt(struct device *dev, struct device_route *route, int cmd) if (have_gw) nla_put(msg, RTA_GATEWAY, alen, &route->nexthop); - nla_put_u32(msg, RTA_OIF, ifindex); + if (dev) + nla_put_u32(msg, RTA_OIF, dev->ifindex); + + if (table >= 256) + nla_put_u32(msg, RTA_TABLE, table); return system_rtnl_call(msg); } @@ -981,6 +1039,226 @@ int system_flush_routes(void) return 0; } +bool system_resolve_rt_table(const char *name, unsigned int *id) +{ + FILE *f; + char *e, buf[128]; + unsigned int n, table = RT_TABLE_UNSPEC; + + /* first try to parse table as number */ + if ((n = strtoul(name, &e, 0)) > 0 && !*e) + table = n; + + /* handle well known aliases */ + else if (!strcmp(name, "default")) + table = RT_TABLE_DEFAULT; + else if (!strcmp(name, "main")) + table = RT_TABLE_MAIN; + else if (!strcmp(name, "local")) + table = RT_TABLE_LOCAL; + + /* try to look up name in /etc/iproute2/rt_tables */ + else if ((f = fopen("/etc/iproute2/rt_tables", "r")) != NULL) + { + while (fgets(buf, sizeof(buf) - 1, f) != NULL) + { + if ((e = strtok(buf, " \t\n")) == NULL || *e == '#') + continue; + + n = strtoul(e, NULL, 10); + e = strtok(NULL, " \t\n"); + + if (e && !strcmp(e, name)) + { + table = n; + break; + } + } + + fclose(f); + } + + if (table == RT_TABLE_UNSPEC) + return false; + + /* do not consider main table special */ + if (table == RT_TABLE_MAIN) + table = RT_TABLE_UNSPEC; + + *id = table; + return true; +} + +static int system_iprule(struct iprule *rule, int cmd) +{ + int alen = ((rule->flags & IPRULE_FAMILY) == IPRULE_INET4) ? 4 : 16; + + struct nl_msg *msg; + struct rtmsg rtm = { + .rtm_family = (alen == 4) ? AF_INET : AF_INET6, + .rtm_protocol = RTPROT_STATIC, + .rtm_scope = RT_SCOPE_UNIVERSE, + .rtm_table = RT_TABLE_UNSPEC, + .rtm_type = RTN_UNSPEC, + .rtm_flags = 0, + }; + + if (cmd == RTM_NEWRULE) { + rtm.rtm_type = RTN_UNICAST; + rtm.rtm_flags |= NLM_F_REPLACE | NLM_F_EXCL; + } + + if (rule->invert) + rtm.rtm_flags |= FIB_RULE_INVERT; + + if (rule->flags & IPRULE_SRC) + rtm.rtm_src_len = rule->src_mask; + + if (rule->flags & IPRULE_DEST) + rtm.rtm_dst_len = rule->dest_mask; + + if (rule->flags & IPRULE_TOS) + rtm.rtm_tos = rule->tos; + + if (rule->flags & IPRULE_LOOKUP) { + if (rule->lookup < 256) + rtm.rtm_table = rule->lookup; + } + + if (rule->flags & IPRULE_ACTION) + rtm.rtm_type = rule->action; + else if (rule->flags & IPRULE_GOTO) + rtm.rtm_type = FR_ACT_GOTO; + else if (!(rule->flags & (IPRULE_LOOKUP | IPRULE_ACTION | IPRULE_GOTO))) + rtm.rtm_type = FR_ACT_NOP; + + msg = nlmsg_alloc_simple(cmd, NLM_F_REQUEST); + + if (!msg) + return -1; + + nlmsg_append(msg, &rtm, sizeof(rtm), 0); + + if (rule->flags & IPRULE_IN) + nla_put(msg, FRA_IFNAME, strlen(rule->in_dev) + 1, rule->in_dev); + + if (rule->flags & IPRULE_OUT) + nla_put(msg, FRA_OIFNAME, strlen(rule->out_dev) + 1, rule->out_dev); + + if (rule->flags & IPRULE_SRC) + nla_put(msg, FRA_SRC, alen, &rule->src_addr); + + if (rule->flags & IPRULE_DEST) + nla_put(msg, FRA_DST, alen, &rule->dest_addr); + + if (rule->flags & IPRULE_PRIORITY) + nla_put_u32(msg, FRA_PRIORITY, rule->priority); + else if (cmd == RTM_NEWRULE) + nla_put_u32(msg, FRA_PRIORITY, rule->order); + + if (rule->flags & IPRULE_FWMARK) + nla_put_u32(msg, FRA_FWMARK, rule->fwmark); + + if (rule->flags & IPRULE_FWMASK) + nla_put_u32(msg, FRA_FWMASK, rule->fwmask); + + if (rule->flags & IPRULE_LOOKUP) { + if (rule->lookup >= 256) + nla_put_u32(msg, FRA_TABLE, rule->lookup); + } + + if (rule->flags & IPRULE_GOTO) + nla_put_u32(msg, FRA_GOTO, rule->gotoid); + + return system_rtnl_call(msg); +} + +int system_add_iprule(struct iprule *rule) +{ + return system_iprule(rule, RTM_NEWRULE); +} + +int system_del_iprule(struct iprule *rule) +{ + return system_iprule(rule, RTM_DELRULE); +} + +int system_flush_iprules(void) +{ + int rv = 0; + struct iprule rule; + + system_if_clear_entries(NULL, RTM_GETRULE, AF_INET); + system_if_clear_entries(NULL, RTM_GETRULE, AF_INET6); + + memset(&rule, 0, sizeof(rule)); + + + rule.flags = IPRULE_INET4 | IPRULE_PRIORITY | IPRULE_LOOKUP; + + rule.priority = 0; + rule.lookup = RT_TABLE_LOCAL; + rv |= system_iprule(&rule, RTM_NEWRULE); + + rule.priority = 32766; + rule.lookup = RT_TABLE_MAIN; + rv |= system_iprule(&rule, RTM_NEWRULE); + + rule.priority = 32767; + rule.lookup = RT_TABLE_DEFAULT; + rv |= system_iprule(&rule, RTM_NEWRULE); + + + rule.flags = IPRULE_INET6 | IPRULE_PRIORITY | IPRULE_LOOKUP; + + rule.priority = 0; + rule.lookup = RT_TABLE_LOCAL; + rv |= system_iprule(&rule, RTM_NEWRULE); + + rule.priority = 32766; + rule.lookup = RT_TABLE_MAIN; + rv |= system_iprule(&rule, RTM_NEWRULE); + + return rv; +} + +bool system_resolve_iprule_action(const char *action, unsigned int *id) +{ + char *e; + unsigned int n; + + if (!strcmp(action, "local")) + n = RTN_LOCAL; + else if (!strcmp(action, "nat")) + n = RTN_NAT; + else if (!strcmp(action, "broadcast")) + n = RTN_BROADCAST; + else if (!strcmp(action, "anycast")) + n = RTN_ANYCAST; + else if (!strcmp(action, "multicast")) + n = RTN_MULTICAST; + else if (!strcmp(action, "prohibit")) + n = RTN_PROHIBIT; + else if (!strcmp(action, "unreachable")) + n = RTN_UNREACHABLE; + else if (!strcmp(action, "blackhole")) + n = RTN_BLACKHOLE; + else if (!strcmp(action, "xresolve")) + n = RTN_XRESOLVE; + else if (!strcmp(action, "unicast")) + n = RTN_UNICAST; + else if (!strcmp(action, "throw")) + n = RTN_THROW; + else { + n = strtoul(action, &e, 0); + if (!e || *e || e == action || n > 255) + return false; + } + + *id = n; + return true; +} + time_t system_get_rtime(void) { struct timespec ts; @@ -1025,6 +1303,33 @@ int system_del_ip_tunnel(const char *name) return tunnel_ioctl(name, SIOCDELTUNNEL, &p); } +int system_update_ipv6_mtu(struct device *dev, int mtu) +{ + int ret = -1; + char buf[64]; + snprintf(buf, sizeof(buf), "/proc/sys/net/ipv6/conf/%s/mtu", + dev->ifname); + + int fd = open(buf, O_RDWR); + ssize_t len = read(fd, buf, sizeof(buf) - 1); + if (len < 0) + goto out; + + buf[len] = 0; + ret = atoi(buf); + + if (!mtu || ret <= mtu) + goto out; + + lseek(fd, 0, SEEK_SET); + if (write(fd, buf, snprintf(buf, sizeof(buf), "%i", mtu)) <= 0) + ret = -1; + +out: + close(fd); + return ret; +} + static int parse_ipaddr(struct blob_attr *attr, __be32 *addr) { if (!attr)