Afs Binary Options Ifm

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/* * Copyright (c) 1983, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1.

Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer.

* 2.

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Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission.

* * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE.

*/#ifndef lintstaticconstcharcopyright[]="@(#) Copyright (c) 1983, 1993\n\ The Regents of the University of California.

All rights reserved.\n";#endif /* not lint */#ifndef lint#if 0staticcharsccsid[]="@(#)ifconfig.c 8.2 (Berkeley) 2/16/94";#endifstaticconstcharrcsid[]="$FreeBSD: src/sbin/ifconfig/ifconfig.c,v 1.113.2.6 2007/10/11 20:20:39 thompsa Exp $";#endif /* not lint */#include <sys/param.h>#include <sys/ioctl.h>#include <sys/socket.h>#include <sys/sysctl.h>#include <sys/time.h>#include <sys/module.h>#include <sys/linker.h>#include <net/ethernet.h>#include <net/if.h>#include <net/if_var.h>#include <net/if_dl.h>#include <net/if_types.h>#include <net/route.h>/* IP */#include <netinet/in.h>#include <netinet/in_var.h>#include <arpa/inet.h>#include <netdb.h>#include <ctype.h>#include <err.h>#include <errno.h>#include <fcntl.h>#include <stdio.h>#include <stdlib.h>#include <string.h>#include <unistd.h>#include "ifconfig.h"/* * Since "struct ifreq" is composed of various union members, callers * should pay special attention to interprete the value.

* (.e.g. little/big endian difference in the structure.) */structifreqifr;charname[IFNAMSIZ];intflags;intsetaddr;intsetipdst;intsetmask;intdoalias;intclearaddr;intnewaddr=1;intverbose;intnoload;intsupmedia=0;intprintkeys=0;/* Print keying material for interfaces.

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*/intprintname=0;/* Print the name of the created interface. */staticintifconfig(intargc, char*const*argv, conststructafswtch*afp);staticvoidstatus(conststructafswtch*afp, intaddrcount, structsockaddr_dl*sdl, structif_msghdr*ifm, structifa_msghdr*ifam);staticvoidtunnel_status(ints);staticvoidusage(void);staticstructafswtch*af_getbyname(constchar*name);staticstructafswtch*af_getbyfamily(intaf);staticvoidaf_other_status(int);staticstructoption*opts=NULL;voidopt_register(structoption*p){p->next=opts;opts=p;}staticvoidusage(void){charoptions[1024];structoption*p;/* XXX not right but close enough for now */options[0]='\0';for(p=opts;p!=NULL;p=p->next){strlcat(options, p->opt_usage, sizeof(options));strlcat(options, " ", sizeof(options));}fprintf(stderr, "usage: ifconfig %sinterface address_family [address [dest_address]]\n"" [parameters]\n"" ifconfig interface create\n"" ifconfig -a %s[-d] [-m] [-u] [-v] [address_family]\n"" ifconfig -l [-d] [-u] [address_family]\n"" ifconfig %s[-d] [-m] [-u] [-v]\n", options, options, options);exit(1);}intmain(intargc, char*argv[]){intc, all, namesonly, downonly, uponly;intneed_nl=0, count=0;conststructafswtch*afp=NULL;intaddrcount, ifindex;structif_msghdr*ifm, *nextifm;structifa_msghdr*ifam;structsockaddr_dl*sdl;char*buf, *lim, *next;size_tneeded;intmib[6];charoptions[1024];structoption*p;all=downonly=uponly=namesonly=noload=verbose=0;/* Parse leading line options */strlcpy(options, "adklmnuv", sizeof(options));for(p=opts;p!=NULL;p=p->next)strlcat(options, p->opt, sizeof(options));while((c=getopt(argc, argv, options))!=-1){switch(c){case'a':/* scan all interfaces */all++;break;case'd':/* restrict scan to "down" interfaces */downonly++;break;case'k':printkeys++;break;case'l':/* scan interface names only */namesonly++;break;case'm':/* show media choices in status */supmedia=1;break;case'n':/* suppress module loading */noload++;break;case'u':/* restrict scan to "up" interfaces */uponly++;break;case'v':verbose++;break;default:for(p=opts;p!=NULL;p=p->next)if(p->opt[0]==c){p->cb(optarg);break;}if(p==NULL)usage();break;}}argc-=optind;argv+=optind;/* -l cannot be used with -a or -m */if(namesonly&&(all||supmedia))usage();/* nonsense..

*/if(uponly&&downonly)usage();/* no arguments is equivalent to '-a' */if(!namesonly&&argc<1)all=1;/* -a and -l allow an address family arg to limit the output */if(all||namesonly){if(argc>1)usage();ifindex=0;if(argc==1){afp=af_getbyname(*argv);if(afp==NULL)usage();if(afp->af_name!=NULL)argc--, argv++;/* leave with afp non-zero */}}else{/* not listing, need an argument */if(argc<1)usage();strncpy(name, *argv, sizeof(name));argc--, argv++;/* check and maybe load support for this interface */ifmaybeload(name);/* * NOTE: We must special-case the `create' command right * here as we would otherwise fail when trying to find * the interface.

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*/if(argc>0&&(strcmp(argv[0], "create")==0||strcmp(argv[0], "plumb")==0)){clone_create();argc--, argv++;if(argc==0)gotoend;}ifindex=if_nametoindex(name);if(ifindex==0)errx(1, "interface %s does not exist", name);}/* Check for address family */if(argc>0){afp=af_getbyname(*argv);if(afp!=NULL)argc--, argv++;}retry:mib[0]=CTL_NET;mib[1]=PF_ROUTE;mib[2]=0;mib[3]=0;/* address family */mib[4]=NET_RT_IFLIST;mib[5]=ifindex;/* interface index *//* if particular family specified, only ask about it */if(afp!=NULL)mib[3]=afp->af_af;if(sysctl(mib, 6, NULL, &needed, NULL, 0)<0)errx(1, "iflist-sysctl-estimate");if((buf=malloc(needed))==NULL)errx(1, "malloc");if(sysctl(mib, 6, buf, &needed, NULL, 0)<0){if(errno==ENOMEM&&count++<10){warnx("Routing table grew, retrying");free(buf);sleep(1);gotoretry;}errx(1, "actual retrieval of interface table");}lim=buf+needed;next=buf;while(next<lim){ifm=(structif_msghdr*)next;if(ifm->ifm_type==RTM_IFINFO){if(ifm->ifm_data.ifi_datalen==0)ifm->ifm_data.ifi_datalen=sizeof(structif_data);sdl=(structsockaddr_dl*)((char*)ifm+sizeof(structif_msghdr)-sizeof(structif_data)+ifm->ifm_data.ifi_datalen);flags=ifm->ifm_flags;}else{fprintf(stderr, "out of sync parsing NET_RT_IFLIST\n");fprintf(stderr, "expected %d, got %d\n", RTM_IFINFO, ifm->ifm_type);fprintf(stderr, "msglen = %d\n", ifm->ifm_msglen);fprintf(stderr, "buf:%p, next:%p, lim:%p\n", buf, next, lim);exit(1);}next+=ifm->ifm_msglen;ifam=NULL;addrcount=0;while(next<lim){nextifm=(structif_msghdr*)next;if(nextifm->ifm_type!=RTM_NEWADDR)break;if(ifam==NULL)ifam=(structifa_msghdr*)nextifm;addrcount++;next+=nextifm->ifm_msglen;}memcpy(name, sdl->sdl_data, sizeof(name)<sdl->sdl_nlen ?

sizeof(name)-1:sdl->sdl_nlen);name[sizeof(name)<sdl->sdl_nlen ? sizeof(name)-1:sdl->sdl_nlen]='\0';if(all||namesonly){if(uponly)if((flags&IFF_UP)==0)continue;/* not up */if(downonly)if(flags&IFF_UP)continue;/* not down */if(namesonly){if(afp==NULL||afp->af_af!=AF_LINK||sdl->sdl_type==IFT_ETHER){if(need_nl)putchar(' ');fputs(name, stdout);need_nl++;}continue;}}if(argc>0)ifconfig(argc, argv, afp);elsestatus(afp, addrcount, sdl, ifm, ifam);}free(buf);if(namesonly&&need_nl>0)putchar('\n');end:if(printname)printf("%s\n", name);exit(0);}staticstructafswtch*afs=NULL;voidaf_register(structafswtch*p){p->af_next=afs;afs=p;}staticstructafswtch*af_getbyname(constchar*name){structafswtch*afp;for(afp=afs;afp!=NULL;afp=afp->af_next)if(strcmp(afp->af_name, name)==0)returnafp;returnNULL;}staticstructafswtch*af_getbyfamily(intaf){structafswtch*afp;for(afp=afs;afp!=NULL;afp=afp->af_next)if(afp->af_af==af)returnafp;returnNULL;}staticvoidaf_other_status(ints){structafswtch*afp;uint8_tafmask[howmany(AF_MAX, NBBY)];memset(afmask, 0, sizeof(afmask));for(afp=afs;afp!=NULL;afp=afp->af_next){if(afp->af_other_status==NULL)continue;if(afp->af_af!=AF_UNSPEC&&isset(afmask, afp->af_af))continue;afp->af_other_status(s);setbit(afmask, afp->af_af);}}staticvoidaf_all_tunnel_status(ints){structafswtch*afp;uint8_tafmask[howmany(AF_MAX, NBBY)];memset(afmask, 0, sizeof(afmask));for(afp=afs;afp!=NULL;afp=afp->af_next){if(afp->af_status_tunnel==NULL)continue;if(afp->af_af!=AF_UNSPEC&&isset(afmask, afp->af_af))continue;afp->af_status_tunnel(s);setbit(afmask, afp->af_af);}}staticstructcmd*cmds=NULL;voidcmd_register(structcmd*p){p->c_next=cmds;cmds=p;}staticconststructcmd*cmd_lookup(constchar*name){#define N(a) (sizeof(a)/sizeof(a[0]))conststructcmd*p;for(p=cmds;p!=NULL;p=p->c_next)if(strcmp(name, p->c_name)==0)returnp;returnNULL;#undef N}structcallback{callback_func*cb_func;void*cb_arg;structcallback*cb_next;};staticstructcallback*callbacks=NULL;voidcallback_register(callback_func*func, void*arg){structcallback*cb;cb=malloc(sizeof(structcallback));if(cb==NULL)errx(1, "unable to allocate memory for callback");cb->cb_func=func;cb->cb_arg=arg;cb->cb_next=callbacks;callbacks=cb;}/* specially-handled commands */staticvoidsetifaddr(constchar*, int, int, conststructafswtch*);staticconststructcmdsetifaddr_cmd=DEF_CMD("ifaddr", 0, setifaddr);staticvoidsetifdstaddr(constchar*, int, int, conststructafswtch*);staticconststructcmdsetifdstaddr_cmd=DEF_CMD("ifdstaddr", 0, setifdstaddr);staticintifconfig(intargc, char*const*argv, conststructafswtch*afp){structcallback*cb;ints;if(afp==NULL)afp=af_getbyname("inet");ifr.ifr_addr.sa_family=afp->af_af==AF_LINK||afp->af_af==AF_UNSPEC ?

AF_INET:afp->af_af;strncpy(ifr.ifr_name, name, sizeofifr.ifr_name);if((s=socket(ifr.ifr_addr.sa_family, SOCK_DGRAM, 0))<0)err(1, "socket(family %u,SOCK_DGRAM", ifr.ifr_addr.sa_family);while(argc>0){conststructcmd*p;p=cmd_lookup(*argv);if(p==NULL){/* * Not a recognized command, choose between setting * the interface address and the dst address.

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*/p=(setaddr ? &setifdstaddr_cmd:&setifaddr_cmd);}if(p->c_u.c_func||p->c_u.c_func2){if(p->c_parameter==NEXTARG){if(argv[1]==NULL)errx(1, "'%s' requires argument", p->c_name);p->c_u.c_func(argv[1], 0, s, afp);argc--, argv++;}elseif(p->c_parameter==OPTARG){p->c_u.c_func(argv[1], 0, s, afp);if(argv[1]!=NULL)argc--, argv++;}elseif(p->c_parameter==NEXTARG2){if(argc<3)errx(1, "'%s' requires 2 arguments", p->c_name);p->c_u.c_func2(argv[1], argv[2], s, afp);argc-=2, argv+=2;}elsep->c_u.c_func(*argv, p->c_parameter, s, afp);}argc--, argv++;}/* * Do any post argument processing required by the address family.

*/if(afp->af_postproc!=NULL)afp->af_postproc(s, afp);/* * Do deferred callbacks registered while processing * command-line arguments. */for(cb=callbacks;cb!=NULL;cb=cb->cb_next)cb->cb_func(s, cb->cb_arg);/* * Do deferred operations.

*/if(clearaddr){if(afp->af_ridreq==NULL||afp->af_difaddr==0){warnx("interface %s cannot change %s addresses!", name, afp->af_name);clearaddr=0;}}if(clearaddr){intret;strncpy(afp->af_ridreq, name, sizeofifr.ifr_name);ret=ioctl(s, afp->af_difaddr, afp->af_ridreq);if(ret<0){if(errno==EADDRNOTAVAIL&&(doalias>=0)){/* means no previous address for interface */}elsePerror("ioctl (SIOCDIFADDR)");}}if(newaddr){if(afp->af_addreq==NULL||afp->af_aifaddr==0){warnx("interface %s cannot change %s addresses!", name, afp->af_name);newaddr=0;}}if(newaddr&&(setaddr||setmask)){strncpy(afp->af_addreq, name, sizeofifr.ifr_name);if(ioctl(s, afp->af_aifaddr, afp->af_addreq)<0)Perror("ioctl (SIOCAIFADDR)");}close(s);return(0);}/*ARGSUSED*/staticvoidsetifaddr(constchar*addr, intparam, ints, conststructafswtch*afp){if(afp->af_getaddr==NULL)return;/* * Delay the ioctl to set the interface addr until flags are all set.

* The address interpretation may depend on the flags, * and the flags may change when the address is set.

*/setaddr++;if(doalias==0&&afp->af_af!=AF_LINK)clearaddr=1;afp->af_getaddr(addr, (doalias>=0 ? ADDR:RIDADDR));}staticvoidsettunnel(constchar*src, constchar*dst, ints, conststructafswtch*afp){structaddrinfo*srcres, *dstres;intecode;if(afp->af_settunnel==NULL){warn("address family %s does not support tunnel setup", afp->af_name);return;}if((ecode=getaddrinfo(src, NULL, NULL, &srcres))!=0)errx(1, "error in parsing address string: %s", gai_strerror(ecode));if((ecode=getaddrinfo(dst, NULL, NULL, &dstres))!=0)errx(1, "error in parsing address string: %s", gai_strerror(ecode));if(srcres->ai_addr->sa_family!=dstres->ai_addr->sa_family)errx(1, "source and destination address families do not match");afp->af_settunnel(s, srcres, dstres);freeaddrinfo(srcres);freeaddrinfo(dstres);}/* ARGSUSED */staticvoiddeletetunnel(constchar*vname, intparam, ints, conststructafswtch*afp){if(ioctl(s, SIOCDIFPHYADDR, &ifr)<0)err(1, "SIOCDIFPHYADDR");}staticvoidsetifnetmask(constchar*addr, intdummy__unused, ints, conststructafswtch*afp){if(afp->af_getaddr!=NULL){setmask++;afp->af_getaddr(addr, MASK);}}staticvoidsetifbroadaddr(constchar*addr, intdummy__unused, ints, conststructafswtch*afp){if(afp->af_getaddr!=NULL)afp