1 /* 2 * dhcpcd - DHCP client daemon 3 * Copyright (c) 2006-2015 Roy Marples <roy@marples.name> 4 * All rights reserved 5 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #ifndef DHCPCD_H 29 #define DHCPCD_H 30 31 #include <sys/socket.h> 32 #include <net/if.h> 33 34 #include "config.h" 35 #include "defs.h" 36 #include "control.h" 37 #include "if-options.h" 38 39 #define HWADDR_LEN 20 40 #define IF_SSIDSIZE 33 41 #define PROFILE_LEN 64 42 #define SECRET_LEN 64 43 #define LEASE_IDENTIFIER_LEN (PATH_MAX - sizeof(LEASEFILE)) 44 45 #define LINK_UP 1 46 #define LINK_UNKNOWN 0 47 #define LINK_DOWN -1 48 49 #define IF_DATA_IPV4 0 50 #define IF_DATA_DHCP 1 51 #define IF_DATA_IPV6 2 52 #define IF_DATA_IPV6ND 3 53 #define IF_DATA_DHCP6 4 54 #define IF_DATA_MAX 5 55 56 /* If the interface does not support carrier status (ie PPP), 57 * dhcpcd can poll it for the relevant flags periodically */ 58 #define IF_POLL_UP 100 /* milliseconds */ 59 60 struct interface { 61 struct dhcpcd_ctx *ctx; 62 TAILQ_ENTRY(interface) next; 63 char name[IF_NAMESIZE]; 64 #ifdef __linux__ 65 char alias[IF_NAMESIZE]; 66 #endif 67 unsigned int index; 68 unsigned int flags; 69 sa_family_t family; 70 unsigned char hwaddr[HWADDR_LEN]; 71 uint8_t hwlen; 72 unsigned int metric; 73 int carrier; 74 int wireless; 75 uint8_t ssid[IF_SSIDSIZE]; 76 unsigned int ssid_len; 77 char lease_identifier[LEASE_IDENTIFIER_LEN]; 78 79 char profile[PROFILE_LEN]; 80 struct if_options *options; 81 void *if_data[IF_DATA_MAX]; 82 }; 83 TAILQ_HEAD(if_head, interface); 84 85 struct dhcpcd_ctx { 86 int pid_fd; 87 char pidfile[sizeof(PIDFILE) + IF_NAMESIZE + 1]; 88 const char *cffile; 89 unsigned long long options; 90 char *logfile; 91 int log_fd; 92 int argc; 93 char **argv; 94 int ifac; /* allowed interfaces */ 95 char **ifav; /* allowed interfaces */ 96 int ifdc; /* denied interfaces */ 97 char **ifdv; /* denied interfaces */ 98 int ifc; /* listed interfaces */ 99 char **ifv; /* listed interfaces */ 100 int ifcc; /* configured interfaces */ 101 char **ifcv; /* configured interfaces */ 102 unsigned char *duid; 103 size_t duid_len; 104 int link_fd; 105 struct if_head *ifaces; 106 107 #ifdef USE_SIGNALS 108 sigset_t sigset; 109 #endif 110 struct eloop_ctx *eloop; 111 112 int control_fd; 113 int control_unpriv_fd; 114 struct fd_list_head control_fds; 115 char control_sock[sizeof(CONTROLSOCKET) + IF_NAMESIZE]; 116 gid_t control_group; 117 118 /* DHCP Enterprise options, RFC3925 */ 119 struct dhcp_opt *vivso; 120 size_t vivso_len; 121 122 #ifdef INET 123 struct dhcp_opt *dhcp_opts; 124 size_t dhcp_opts_len; 125 struct rt_head *ipv4_routes; 126 struct rt_head *ipv4_kroutes; 127 128 int udp_fd; 129 uint8_t *packet; 130 131 /* Our aggregate option buffer. 132 * We ONLY use this when options are split, which for most purposes is 133 * practically never. See RFC3396 for details. */ 134 uint8_t *opt_buffer; 135 #endif 136 #ifdef INET6 137 unsigned char secret[SECRET_LEN]; 138 size_t secret_len; 139 140 struct dhcp_opt *dhcp6_opts; 141 size_t dhcp6_opts_len; 142 struct ipv6_ctx *ipv6; 143 #ifndef __linux__ 144 int ra_global; 145 #endif 146 #endif /* INET6 */ 147 148 #ifdef PLUGIN_DEV 149 char *dev_load; 150 int dev_fd; 151 struct dev *dev; 152 void *dev_handle; 153 #endif 154 }; 155 156 #ifdef USE_SIGNALS 157 struct dhcpcd_siginfo { 158 int signo; 159 }; 160 161 extern const int dhcpcd_handlesigs[]; 162 void dhcpcd_handle_signal(void *); 163 #endif 164 165 int dhcpcd_oneup(struct dhcpcd_ctx *); 166 int dhcpcd_ipwaited(struct dhcpcd_ctx *); 167 pid_t dhcpcd_daemonise(struct dhcpcd_ctx *); 168 169 int dhcpcd_handleargs(struct dhcpcd_ctx *, struct fd_list *, int, char **); 170 void dhcpcd_handlecarrier(struct dhcpcd_ctx *, int, unsigned int, const char *); 171 int dhcpcd_handleinterface(void *, int, const char *); 172 void dhcpcd_handlehwaddr(struct dhcpcd_ctx *, const char *, 173 const unsigned char *, uint8_t); 174 void dhcpcd_dropinterface(struct interface *, const char *); 175 int dhcpcd_selectprofile(struct interface *, const char *); 176 177 void dhcpcd_startinterface(void *); 178 void dhcpcd_initstate(struct interface *, unsigned long long); 179 180 void dhcpcd_start_interface(struct dhcpcd_ctx *, const char *); 181 void dhcpcd_stop_interface(struct dhcpcd_ctx *, const char *); 182 void dhcpcd_release_ipv4(struct dhcpcd_ctx *, const char *); 183 void dhcpcd_stop_interfaces(struct dhcpcd_ctx *); 184 185 #endif 186