From b564819c4856b666e0a7d40b6f25ba84c120bcd7 Mon Sep 17 00:00:00 2001 From: Steven Barth Date: Thu, 20 Aug 2015 10:42:02 +0200 Subject: [PATCH] Revert "RFC: dhcpv4 support openwrt alias ip addr" --- src/dhcpv4.c | 66 ++++++++++++++++------------------------------ src/odhcpd.h | 4 --- src/ubus.c | 74 ---------------------------------------------------- 3 files changed, 23 insertions(+), 121 deletions(-) diff --git a/src/dhcpv4.c b/src/dhcpv4.c index 26cd5e1..a657e13 100644 --- a/src/dhcpv4.c +++ b/src/dhcpv4.c @@ -118,41 +118,19 @@ int setup_dhcpv4_interface(struct interface *iface, bool enable) return -1; } -#ifndef WITH_UBUS + // Create a range if not specified struct ifreq ifreq; strncpy(ifreq.ifr_name, iface->ifname, sizeof(ifreq.ifr_name)); struct sockaddr_in *saddr = (struct sockaddr_in*)&ifreq.ifr_addr; struct sockaddr_in *smask = (struct sockaddr_in*)&ifreq.ifr_netmask; - - if (!ioctl(sock, SIOCGIFADDR, &ifreq)) { + if (!(iface->dhcpv4_start.s_addr & htonl(0xffff0000)) && + !(iface->dhcpv4_end.s_addr & htonl(0xffff0000)) && + !ioctl(sock, SIOCGIFADDR, &ifreq)) { struct in_addr addr = saddr->sin_addr; - iface->dhcpv4_addr.s_addr = addr.s_addr; + ioctl(sock, SIOCGIFNETMASK, &ifreq); struct in_addr mask = smask->sin_addr; - iface->dhcpv4_mask.s_addr = mask.s_addr; - } -#else - const char* saddr = ubus_get_address4(iface->name); - struct in_addr addr; - inet_pton(AF_INET,saddr, &addr); - iface->dhcpv4_addr.s_addr = addr.s_addr; - int bits = ubus_get_mask4(iface->name); - struct in_addr mask; - if (bits < -32 || bits > 32) - bits = 0; - - mask.s_addr = bits ? htonl(~((1 << (32 - abs(bits))) - 1)) : 0; - if (bits < 0) - mask.s_addr = ~mask.s_addr; - - iface->dhcpv4_mask.s_addr = mask.s_addr; -#endif - - // Create a range if not specified - if (!(iface->dhcpv4_start.s_addr & htonl(0xffff0000)) && - !(iface->dhcpv4_end.s_addr & htonl(0xffff0000)) && - iface->dhcpv4_addr.s_addr) { uint32_t start = ntohl(iface->dhcpv4_start.s_addr); uint32_t end = ntohl(iface->dhcpv4_end.s_addr); @@ -186,11 +164,6 @@ int setup_dhcpv4_interface(struct interface *iface, bool enable) } - syslog(LOG_WARNING, "DHCPv4 dhcp addr %s", inet_ntoa(iface->dhcpv4_addr)); - syslog(LOG_WARNING, "DHCPv4 dhcp mask %s", inet_ntoa(iface->dhcpv4_mask)); - syslog(LOG_WARNING, "DHCPv4 dhcp start %s", inet_ntoa(iface->dhcpv4_start)); - syslog(LOG_WARNING, "DHCPv4 dhcp end %s", inet_ntoa(iface->dhcpv4_end)); - // Parse static entries struct lease *lease; @@ -230,8 +203,8 @@ int setup_dhcpv4_interface(struct interface *iface, bool enable) // Clean invalid assignments struct dhcpv4_assignment *a, *n; list_for_each_entry_safe(a, n, &iface->dhcpv4_assignments, head) { - if ((htonl(a->addr) & mask.s_addr) != - (iface->dhcpv4_start.s_addr & mask.s_addr)) { + if ((htonl(a->addr) & smask->sin_addr.s_addr) != + (iface->dhcpv4_start.s_addr & smask->sin_addr.s_addr)) { list_del(&a->head); free(a); } @@ -285,6 +258,8 @@ static void handle_dhcpv4(void *addr, void *data, size_t len, return; int sock = iface->dhcpv4_event.uloop.fd; + struct sockaddr_in ifaddr; + struct sockaddr_in ifnetmask; syslog(LOG_NOTICE, "Got DHCPv4 request"); @@ -295,10 +270,15 @@ static void handle_dhcpv4(void *addr, void *data, size_t len, return; } - uint32_t network = iface->dhcpv4_addr.s_addr & iface->dhcpv4_mask.s_addr; + memcpy(&ifaddr, &ifreq.ifr_addr, sizeof(ifaddr)); + if (ioctl(sock, SIOCGIFNETMASK, &ifreq)) + return; + + memcpy(&ifnetmask, &ifreq.ifr_netmask, sizeof(ifnetmask)); + uint32_t network = ifaddr.sin_addr.s_addr & ifnetmask.sin_addr.s_addr; - if ((iface->dhcpv4_start.s_addr & iface->dhcpv4_mask.s_addr) != network || - (iface->dhcpv4_end.s_addr & iface->dhcpv4_mask.s_addr) != network) { + if ((iface->dhcpv4_start.s_addr & ifnetmask.sin_addr.s_addr) != network || + (iface->dhcpv4_end.s_addr & ifnetmask.sin_addr.s_addr) != network) { syslog(LOG_WARNING, "DHCPv4 range out of assigned network"); return; } @@ -316,7 +296,7 @@ static void handle_dhcpv4(void *addr, void *data, size_t len, .flags = req->flags, .ciaddr = {INADDR_ANY}, .giaddr = req->giaddr, - .siaddr = iface->dhcpv4_addr, + .siaddr = ifaddr.sin_addr, }; memcpy(reply.chaddr, req->chaddr, sizeof(reply.chaddr)); @@ -345,7 +325,7 @@ static void handle_dhcpv4(void *addr, void *data, size_t len, } else if (opt->type == DHCPV4_OPT_IPADDRESS && opt->len == 4) { memcpy(&reqaddr, opt->data, 4); } else if (opt->type == DHCPV4_OPT_SERVERID && opt->len == 4) { - if (memcmp(opt->data, &iface->dhcpv4_addr, 4)) + if (memcmp(opt->data, &ifaddr.sin_addr, 4)) return; } else if (iface->filter_class && opt->type == DHCPV4_OPT_USER_CLASS) { uint8_t *c = opt->data, *cend = &opt->data[opt->len]; @@ -397,7 +377,7 @@ static void handle_dhcpv4(void *addr, void *data, size_t len, return; dhcpv4_put(&reply, &cookie, DHCPV4_OPT_MESSAGE, 1, &msg); - dhcpv4_put(&reply, &cookie, DHCPV4_OPT_SERVERID, 4, &iface->dhcpv4_addr); + dhcpv4_put(&reply, &cookie, DHCPV4_OPT_SERVERID, 4, &ifaddr.sin_addr); if (lease) { reply.yiaddr.s_addr = htonl(lease->addr); @@ -411,7 +391,7 @@ static void handle_dhcpv4(void *addr, void *data, size_t len, val = htonl(875 * iface->dhcpv4_leasetime / 1000); dhcpv4_put(&reply, &cookie, DHCPV4_OPT_REBIND, 4, &val); - dhcpv4_put(&reply, &cookie, DHCPV4_OPT_NETMASK, 4, &iface->dhcpv4_mask); + dhcpv4_put(&reply, &cookie, DHCPV4_OPT_NETMASK, 4, &ifnetmask.sin_addr); if (lease->hostname[0]) dhcpv4_put(&reply, &cookie, DHCPV4_OPT_HOSTNAME, @@ -441,14 +421,14 @@ static void handle_dhcpv4(void *addr, void *data, size_t len, } if (iface->dhcpv4_router_cnt == 0) - dhcpv4_put(&reply, &cookie, DHCPV4_OPT_ROUTER, 4, &iface->dhcpv4_addr); + dhcpv4_put(&reply, &cookie, DHCPV4_OPT_ROUTER, 4, &ifaddr.sin_addr); else dhcpv4_put(&reply, &cookie, DHCPV4_OPT_ROUTER, 4 * iface->dhcpv4_router_cnt, iface->dhcpv4_router); if (iface->dhcpv4_dns_cnt == 0) - dhcpv4_put(&reply, &cookie, DHCPV4_OPT_DNSSERVER, 4, &iface->dhcpv4_addr); + dhcpv4_put(&reply, &cookie, DHCPV4_OPT_DNSSERVER, 4, &ifaddr.sin_addr); else dhcpv4_put(&reply, &cookie, DHCPV4_OPT_DNSSERVER, 4 * iface->dhcpv4_dns_cnt, iface->dhcpv4_dns); diff --git a/src/odhcpd.h b/src/odhcpd.h index 759fb04..ab24674 100644 --- a/src/odhcpd.h +++ b/src/odhcpd.h @@ -146,8 +146,6 @@ struct interface { int ra_maxinterval; // DHCPv4 - struct in_addr dhcpv4_addr; - struct in_addr dhcpv4_mask; struct in_addr dhcpv4_start; struct in_addr dhcpv4_end; struct in_addr *dhcpv4_router; @@ -213,8 +211,6 @@ int init_ubus(void); const char* ubus_get_ifname(const char *name); void ubus_apply_network(void); bool ubus_has_prefix(const char *name, const char *ifname); -const char* ubus_get_address4(const char *name); -int ubus_get_mask4(const char *name); #endif diff --git a/src/ubus.c b/src/ubus.c index 0ef3153..0b51183 100644 --- a/src/ubus.c +++ b/src/ubus.c @@ -163,7 +163,6 @@ enum { IFACE_ATTR_DATA, IFACE_ATTR_PREFIX, IFACE_ATTR_ADDRESS, - IFACE_ATTR_ADDRESS4, IFACE_ATTR_MAX, }; @@ -174,7 +173,6 @@ static const struct blobmsg_policy iface_attrs[IFACE_ATTR_MAX] = { [IFACE_ATTR_DATA] = { .name = "data", .type = BLOBMSG_TYPE_TABLE }, [IFACE_ATTR_PREFIX] = { .name = "ipv6-prefix", .type = BLOBMSG_TYPE_ARRAY }, [IFACE_ATTR_ADDRESS] = { .name = "ipv6-address", .type = BLOBMSG_TYPE_ARRAY }, - [IFACE_ATTR_ADDRESS4] = { .name = "ipv4-address", .type = BLOBMSG_TYPE_ARRAY }, }; static void handle_dump(_unused struct ubus_request *req, _unused int type, struct blob_attr *msg) @@ -361,78 +359,6 @@ bool ubus_has_prefix(const char *name, const char *ifname) return false; } -const char* ubus_get_address4(const char *name) -{ - struct blob_attr *c, *cur; - unsigned rem; - - if (!dump) - return NULL; - - blobmsg_for_each_attr(c, dump, rem) { - struct blob_attr *tb[IFACE_ATTR_MAX]; - blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb, blobmsg_data(c), blobmsg_data_len(c)); - - if (!tb[IFACE_ATTR_INTERFACE] || strcmp(name, - blobmsg_get_string(tb[IFACE_ATTR_INTERFACE]))) - continue; - - if ((cur = tb[IFACE_ATTR_ADDRESS4])) { - if (blobmsg_type(cur) != BLOBMSG_TYPE_ARRAY || !blobmsg_check_attr(cur, NULL)) - continue; - - struct blob_attr *d; - unsigned drem; - blobmsg_for_each_attr(d, cur, drem) { - struct blob_attr *ccur; - unsigned ddrem; - struct blob_attr *dict = blobmsg_data(cur); - blobmsg_for_each_attr(ccur, dict, ddrem) { - if (!strcmp(blobmsg_name(ccur), "address")) - return blobmsg_get_string(ccur); - } - } - } - } - - return NULL; -} - -int ubus_get_mask4(const char *name) -{ - struct blob_attr *c, *cur; - unsigned rem; - if (!dump) - return 0; - - blobmsg_for_each_attr(c, dump, rem) { - struct blob_attr *tb[IFACE_ATTR_MAX]; - blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb, blobmsg_data(c), blobmsg_data_len(c)); - - if (!tb[IFACE_ATTR_INTERFACE] || strcmp(name, - blobmsg_get_string(tb[IFACE_ATTR_INTERFACE]))) - continue; - - if ((cur = tb[IFACE_ATTR_ADDRESS4])) { - if (blobmsg_type(cur) != BLOBMSG_TYPE_ARRAY || !blobmsg_check_attr(cur, NULL)) - continue; - - struct blob_attr *d; - unsigned drem; - blobmsg_for_each_attr(d, cur, drem) { - struct blob_attr *ccur; - unsigned ddrem; - struct blob_attr *dict = blobmsg_data(cur); - blobmsg_for_each_attr(ccur, dict, ddrem) { - if (!strcmp(blobmsg_name(ccur), "mask")) - return blobmsg_get_u32(ccur); - } - } - } - } - - return 0; -} int init_ubus(void) { -- 2.25.1