1 /* SPDX-License-Identifier: BSD-2-Clause */ 2 /* 3 * dhcpcd - DHCP client daemon 4 * Copyright (c) 2006-2025 Roy Marples <roy (at) marples.name> 5 * All rights reserved 6 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #ifndef DHCPCD_H 30 #define DHCPCD_H 31 32 #include <sys/socket.h> 33 #include <net/if.h> 34 35 #include <stdio.h> 36 37 #include "config.h" 38 #include "defs.h" 39 #include "control.h" 40 #include "if-options.h" 41 #include "queue.h" 42 43 #define HWADDR_LEN 20 44 #define IF_SSIDLEN 32 45 #define PROFILE_LEN 64 46 #define SECRET_LEN 64 47 48 #define IF_INACTIVE 0 49 #define IF_ACTIVE 1 50 #define IF_ACTIVE_USER 2 51 52 #define LINK_UP 1 53 #define LINK_UNKNOWN 0 54 #define LINK_DOWN -1 55 56 #define IF_DATA_IPV4 0 57 #define IF_DATA_ARP 1 58 #define IF_DATA_IPV4LL 2 59 #define IF_DATA_DHCP 3 60 #define IF_DATA_IPV6 4 61 #define IF_DATA_IPV6ND 5 62 #define IF_DATA_DHCP6 6 63 #define IF_DATA_MAX 7 64 65 #ifdef __QNX__ 66 /* QNX carries defines for, but does not actually support PF_LINK */ 67 #undef IFLR_ACTIVE 68 #endif 69 70 struct interface { 71 struct dhcpcd_ctx *ctx; 72 TAILQ_ENTRY(interface) next; 73 char name[IF_NAMESIZE]; 74 unsigned int index; 75 unsigned int active; 76 unsigned int flags; 77 uint16_t hwtype; /* ARPHRD_ETHER for example */ 78 unsigned char hwaddr[HWADDR_LEN]; 79 uint8_t hwlen; 80 int mtu; 81 unsigned short vlanid; 82 unsigned int metric; 83 int carrier; 84 bool wireless; 85 uint8_t ssid[IF_SSIDLEN]; 86 unsigned int ssid_len; 87 88 int argc; 89 char **argv; 90 91 char profile[PROFILE_LEN]; 92 struct if_options *options; 93 void *if_data[IF_DATA_MAX]; 94 }; 95 TAILQ_HEAD(if_head, interface); 96 97 #include "privsep.h" 98 99 /* dhcpcd requires CMSG_SPACE to evaluate to a compile time constant. */ 100 #if defined(__QNX) || \ 101 (defined(__NetBSD_Version__) && __NetBSD_Version__ < 600000000) 102 #undef CMSG_SPACE 103 #endif 104 105 #ifndef ALIGNBYTES 106 #define ALIGNBYTES (sizeof(int) - 1) 107 #endif 108 #ifndef ALIGN 109 #define ALIGN(p) (((unsigned int)(p) + ALIGNBYTES) & ~ALIGNBYTES) 110 #endif 111 #ifndef CMSG_SPACE 112 #define CMSG_SPACE(len) (ALIGN(sizeof(struct cmsghdr)) + ALIGN(len)) 113 #endif 114 115 struct passwd; 116 117 struct dhcpcd_ctx { 118 char pidfile[sizeof(PIDFILE) + IF_NAMESIZE + 1]; 119 char vendor[256]; 120 int fork_fd; /* FD for the fork init signal pipe */ 121 const char *cffile; 122 unsigned long long options; 123 char *logfile; 124 int argc; 125 char **argv; 126 int ifac; /* allowed interfaces */ 127 char **ifav; /* allowed interfaces */ 128 int ifdc; /* denied interfaces */ 129 char **ifdv; /* denied interfaces */ 130 int ifc; /* listed interfaces */ 131 char **ifv; /* listed interfaces */ 132 int ifcc; /* configured interfaces */ 133 char **ifcv; /* configured interfaces */ 134 uint8_t duid_type; 135 unsigned char *duid; 136 size_t duid_len; 137 struct if_head *ifaces; 138 139 char *ctl_buf; 140 size_t ctl_buflen; 141 size_t ctl_bufpos; 142 size_t ctl_extra; 143 144 rb_tree_t routes; /* our routes */ 145 #ifdef RT_FREE_ROUTE_TABLE 146 rb_tree_t froutes; /* free routes for re-use */ 147 #endif 148 size_t rt_order; /* route order storage */ 149 150 int pf_inet_fd; 151 #ifdef PF_LINK 152 int pf_link_fd; 153 #endif 154 void *priv; 155 int link_fd; 156 #ifndef SMALL 157 int link_rcvbuf; 158 #endif 159 int seq; /* route message sequence no */ 160 int sseq; /* successful seq no sent */ 161 162 struct eloop *eloop; 163 164 char *script; 165 #ifdef HAVE_OPEN_MEMSTREAM 166 FILE *script_fp; 167 #endif 168 char *script_buf; 169 size_t script_buflen; 170 char **script_env; 171 size_t script_envlen; 172 173 int control_fd; 174 int control_unpriv_fd; 175 struct fd_list_head control_fds; 176 char control_sock[sizeof(CONTROLSOCKET) + IF_NAMESIZE]; 177 char control_sock_unpriv[sizeof(CONTROLSOCKET) + IF_NAMESIZE + 7]; 178 gid_t control_group; 179 180 /* DHCP Enterprise options, RFC3925 */ 181 struct dhcp_opt *vivso; 182 size_t vivso_len; 183 184 char *randomstate; /* original state */ 185 186 /* For filtering RTM_MISS messages per router */ 187 #ifdef BSD 188 uint8_t *rt_missfilter; 189 size_t rt_missfilterlen; 190 size_t rt_missfiltersize; 191 #endif 192 193 #ifdef PRIVSEP 194 struct passwd *ps_user; /* struct passwd for privsep user */ 195 struct ps_process_head ps_processes; /* List of spawned processes */ 196 struct ps_process *ps_root; 197 struct ps_process *ps_inet; 198 struct ps_process *ps_ctl; 199 int ps_data_fd; /* data returned from processes */ 200 int ps_log_fd; /* chroot logging */ 201 int ps_log_root_fd; /* outside chroot log reader */ 202 struct fd_list *ps_control; /* Queue for the above */ 203 struct fd_list *ps_control_client; /* Queue for the above */ 204 #endif 205 206 #ifdef INET 207 struct dhcp_opt *dhcp_opts; 208 size_t dhcp_opts_len; 209 210 int udp_rfd; 211 int udp_wfd; 212 213 /* Our aggregate option buffer. 214 * We ONLY use this when options are split, which for most purposes is 215 * practically never. See RFC3396 for details. */ 216 uint8_t *opt_buffer; 217 size_t opt_buffer_len; 218 #endif 219 #ifdef INET6 220 uint8_t *secret; 221 size_t secret_len; 222 223 #ifndef __sun 224 int nd_fd; 225 #endif 226 struct ra_head *ra_routers; 227 228 struct dhcp_opt *nd_opts; 229 size_t nd_opts_len; 230 #ifdef DHCP6 231 int dhcp6_rfd; 232 int dhcp6_wfd; 233 struct dhcp_opt *dhcp6_opts; 234 size_t dhcp6_opts_len; 235 #endif 236 237 #ifndef __linux__ 238 int ra_global; 239 #endif 240 #endif /* INET6 */ 241 242 #ifdef PLUGIN_DEV 243 char *dev_load; 244 int dev_fd; 245 struct dev *dev; 246 void *dev_handle; 247 #endif 248 }; 249 250 #ifdef USE_SIGNALS 251 extern const int dhcpcd_signals[]; 252 extern const size_t dhcpcd_signals_len; 253 extern const int dhcpcd_signals_ignore[]; 254 extern const size_t dhcpcd_signals_ignore_len; 255 #endif 256 257 extern const char *dhcpcd_default_script; 258 259 int dhcpcd_ifafwaiting(const struct interface *); 260 int dhcpcd_afwaiting(const struct dhcpcd_ctx *); 261 void dhcpcd_daemonised(struct dhcpcd_ctx *); 262 void dhcpcd_daemonise(struct dhcpcd_ctx *); 263 264 void dhcpcd_linkoverflow(struct dhcpcd_ctx *); 265 int dhcpcd_handleargs(struct dhcpcd_ctx *, struct fd_list *, int, char **); 266 void dhcpcd_handlecarrier(struct interface *, int, unsigned int); 267 int dhcpcd_handleinterface(void *, int, const char *); 268 void dhcpcd_handlehwaddr(struct interface *, uint16_t, const void *, uint8_t); 269 void dhcpcd_dropinterface(struct interface *, const char *); 270 void dhcpcd_dropped(struct interface *); 271 int dhcpcd_selectprofile(struct interface *, const char *); 272 273 void dhcpcd_startinterface(void *); 274 void dhcpcd_activateinterface(struct interface *, unsigned long long); 275 276 #endif 277
Indexes created Mon May 25 00:24:39 UTC 2026