int netlink_slot_allocate( sd_netlink *nl, bool floating, NetlinkSlotType type, size_t extra, sd_netlink_destroy_t destroy_callback, void *userdata, const char *description, sd_netlink_slot **ret) { _cleanup_free_ sd_netlink_slot *slot = NULL; assert(nl); assert(ret); slot = malloc0(offsetof(sd_netlink_slot, reply_callback) + extra); if (!slot) return -ENOMEM; slot->n_ref = 1; slot->netlink = nl; slot->userdata = userdata; slot->destroy_callback = destroy_callback; slot->type = type; slot->floating = floating; if (description) { slot->description = strdup(description); if (!slot->description) return -ENOMEM; } if (!floating) sd_netlink_ref(nl); LIST_PREPEND(slots, nl->slots, slot); *ret = TAKE_PTR(slot); return 0; }
int sd_netlink_slot_set_floating(sd_netlink_slot *slot, int b) { assert_return(slot, -EINVAL); if (slot->floating == !!b) return 0; if (!slot->netlink) /* Already disconnected */ return -ESTALE; slot->floating = b; if (b) { sd_netlink_slot_ref(slot); sd_netlink_unref(slot->netlink); } else { sd_netlink_ref(slot->netlink); sd_netlink_slot_unref(slot); } return 1; }
int local_addresses(sd_netlink *context, int ifindex, int af, struct local_address **ret) { _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL; _cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL; _cleanup_free_ struct local_address *list = NULL; size_t n_list = 0, n_allocated = 0; sd_netlink_message *m; int r; assert(ret); if (context) rtnl = sd_netlink_ref(context); else { r = sd_netlink_open(&rtnl); if (r < 0) return r; } r = sd_rtnl_message_new_addr(rtnl, &req, RTM_GETADDR, 0, af); if (r < 0) return r; r = sd_netlink_call(rtnl, req, 0, &reply); if (r < 0) return r; for (m = reply; m; m = sd_netlink_message_next(m)) { struct local_address *a; unsigned char flags; uint16_t type; int ifi, family; r = sd_netlink_message_get_errno(m); if (r < 0) return r; r = sd_netlink_message_get_type(m, &type); if (r < 0) return r; if (type != RTM_NEWADDR) continue; r = sd_rtnl_message_addr_get_ifindex(m, &ifi); if (r < 0) return r; if (ifindex > 0 && ifi != ifindex) continue; r = sd_rtnl_message_addr_get_family(m, &family); if (r < 0) return r; if (af != AF_UNSPEC && af != family) continue; r = sd_rtnl_message_addr_get_flags(m, &flags); if (r < 0) return r; if (flags & IFA_F_DEPRECATED) continue; if (!GREEDY_REALLOC0(list, n_allocated, n_list+1)) return -ENOMEM; a = list + n_list; r = sd_rtnl_message_addr_get_scope(m, &a->scope); if (r < 0) return r; if (ifindex == 0 && IN_SET(a->scope, RT_SCOPE_HOST, RT_SCOPE_NOWHERE)) continue; switch (family) { case AF_INET: r = sd_netlink_message_read_in_addr(m, IFA_LOCAL, &a->address.in); if (r < 0) { r = sd_netlink_message_read_in_addr(m, IFA_ADDRESS, &a->address.in); if (r < 0) continue; } break; case AF_INET6: r = sd_netlink_message_read_in6_addr(m, IFA_LOCAL, &a->address.in6); if (r < 0) { r = sd_netlink_message_read_in6_addr(m, IFA_ADDRESS, &a->address.in6); if (r < 0) continue; } break; default: continue; } a->ifindex = ifi; a->family = family; n_list++; }; qsort_safe(list, n_list, sizeof(struct local_address), address_compare); *ret = TAKE_PTR(list); return (int) n_list; }
int local_gateways(sd_netlink *context, int ifindex, int af, struct local_address **ret) { _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL; _cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL; _cleanup_free_ struct local_address *list = NULL; sd_netlink_message *m = NULL; size_t n_list = 0, n_allocated = 0; int r; assert(ret); if (context) rtnl = sd_netlink_ref(context); else { r = sd_netlink_open(&rtnl); if (r < 0) return r; } r = sd_rtnl_message_new_route(rtnl, &req, RTM_GETROUTE, af, RTPROT_UNSPEC); if (r < 0) return r; r = sd_netlink_message_request_dump(req, true); if (r < 0) return r; r = sd_netlink_call(rtnl, req, 0, &reply); if (r < 0) return r; for (m = reply; m; m = sd_netlink_message_next(m)) { struct local_address *a; uint16_t type; unsigned char dst_len, src_len; uint32_t ifi; int family; r = sd_netlink_message_get_errno(m); if (r < 0) return r; r = sd_netlink_message_get_type(m, &type); if (r < 0) return r; if (type != RTM_NEWROUTE) continue; /* We only care for default routes */ r = sd_rtnl_message_route_get_dst_prefixlen(m, &dst_len); if (r < 0) return r; if (dst_len != 0) continue; r = sd_rtnl_message_route_get_src_prefixlen(m, &src_len); if (r < 0) return r; if (src_len != 0) continue; r = sd_netlink_message_read_u32(m, RTA_OIF, &ifi); if (r == -ENODATA) /* Not all routes have an RTA_OIF attribute (for example nexthop ones) */ continue; if (r < 0) return r; if (ifindex > 0 && (int) ifi != ifindex) continue; r = sd_rtnl_message_route_get_family(m, &family); if (r < 0) return r; if (af != AF_UNSPEC && af != family) continue; if (!GREEDY_REALLOC0(list, n_allocated, n_list + 1)) return -ENOMEM; a = list + n_list; switch (family) { case AF_INET: r = sd_netlink_message_read_in_addr(m, RTA_GATEWAY, &a->address.in); if (r < 0) continue; break; case AF_INET6: r = sd_netlink_message_read_in6_addr(m, RTA_GATEWAY, &a->address.in6); if (r < 0) continue; break; default: continue; } sd_netlink_message_read_u32(m, RTA_PRIORITY, &a->metric); a->ifindex = ifi; a->family = family; n_list++; } if (n_list > 0) qsort(list, n_list, sizeof(struct local_address), address_compare); *ret = TAKE_PTR(list); return (int) n_list; }