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[/] [or1k_old/] [trunk/] [uclinux/] [uClinux-2.0.x/] [net/] [ipv4/] [ip_sockglue.c] - Blame information for rev 1782

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/*
 * INET         An implementation of the TCP/IP protocol suite for the LINUX
 *              operating system.  INET is implemented using the  BSD Socket
 *              interface as the means of communication with the user level.
 *
 *              The IP to API glue.
 *
 * Authors:     see ip.c
 *
 * Fixes:
 *              Many            :       Split from ip.c , see ip.c for history.
 *              Martin Mares    :       TOS setting fixed.
 *              Alan Cox        :       Fixed a couple of oopses in Martin's
 *                                      TOS tweaks.
 *              Elliot Poger    :       Added support for SO_BINDTODEVICE.
 */
 
 
#include <linux/config.h>
#include <linux/types.h>
#include <linux/mm.h>
#include <linux/sched.h>
#include <linux/skbuff.h>
#include <linux/ip.h>
#include <linux/icmp.h>
#include <linux/netdevice.h>
#include <net/sock.h>
#include <net/ip.h>
#include <net/icmp.h>
#include <linux/tcp.h>
#include <linux/udp.h>
#include <linux/firewall.h>
#include <linux/ip_fw.h>
#include <net/checksum.h>
#include <linux/route.h>
#include <linux/mroute.h>
#include <net/route.h>
 
#include <asm/segment.h>
 
#ifdef CONFIG_IP_MULTICAST
 
/*
 *      Write an multicast group list table for the IGMP daemon to
 *      read.
 */
 
int ip_mc_procinfo(char *buffer, char **start, off_t offset, int length, int dummy)
{
        off_t pos=0, begin=0;
        struct ip_mc_list *im;
        unsigned long flags;
        int len=0;
        struct device *dev;
 
        len=sprintf(buffer,"Device    : Count\tGroup    Users Timer\n");
        save_flags(flags);
        cli();
 
        for(dev = dev_base; dev; dev = dev->next)
        {
                if((dev->flags&IFF_UP)&&(dev->flags&IFF_MULTICAST))
                {
                        len+=sprintf(buffer+len,"%-10s: %5d\n",
                                        dev->name, dev->mc_count);
                        for(im = dev->ip_mc_list; im; im = im->next)
                        {
                                len+=sprintf(buffer+len,
                                        "\t\t\t%08lX %5d %d:%08lX\n",
                                        im->multiaddr, im->users,
                                        im->tm_running, im->timer.expires-jiffies);
                                pos=begin+len;
                                if(pos<offset)
                                {
                                        len=0;
                                        begin=pos;
                                }
                                if(pos>offset+length)
                                        break;
                        }
                }
        }
        restore_flags(flags);
        *start=buffer+(offset-begin);
        len-=(offset-begin);
        if(len>length)
                len=length;
        return len;
}
 
 
/*
 *      Socket option code for IP. This is the end of the line after any TCP,UDP etc options on
 *      an IP socket.
 *
 *      We implement IP_TOS (type of service), IP_TTL (time to live).
 */
 
static struct device *ip_mc_find_devfor(unsigned long addr)
{
        struct device *dev;
        for(dev = dev_base; dev; dev = dev->next)
        {
                if((dev->flags&IFF_UP)&&(dev->flags&IFF_MULTICAST)&&
                        (dev->pa_addr==addr))
                        return dev;
        }
 
        return NULL;
}
 
#endif
 
int ip_setsockopt(struct sock *sk, int level, int optname, char *optval, int optlen)
{
        int val,err;
        unsigned char ucval;
#if defined(CONFIG_IP_FIREWALL) || defined(CONFIG_IP_ACCT)
        struct ip_fw tmp_fw;
#endif  
        if (optval == NULL)
        {
                val=0;
                ucval=0;
        }
        else
        {
                err=verify_area(VERIFY_READ, optval, sizeof(int));
                if(err)
                        return err;
                val = get_user((int *) optval);
                ucval=get_user((unsigned char *) optval);
        }
 
        if(level!=SOL_IP)
                return -EOPNOTSUPP;
#ifdef CONFIG_IP_MROUTE
        if(optname>=MRT_BASE && optname <=MRT_BASE+10)
        {
                return ip_mroute_setsockopt(sk,optname,optval,optlen);
        }
#endif
 
        switch(optname)
        {
                case IP_OPTIONS:
                  {
                          struct options * opt = NULL;
                          struct options * old_opt;
                          if (optlen > 40 || optlen < 0)
                                return -EINVAL;
                          err = verify_area(VERIFY_READ, optval, optlen);
                          if (err)
                                return err;
                          opt = kmalloc(sizeof(struct options)+((optlen+3)&~3), GFP_KERNEL);
                          if (!opt)
                                return -ENOMEM;
                          memset(opt, 0, sizeof(struct options));
                          if (optlen)
                                memcpy_fromfs(opt->__data, optval, optlen);
                          while (optlen & 3)
                                opt->__data[optlen++] = IPOPT_END;
                          opt->optlen = optlen;
                          opt->is_data = 1;
                          opt->is_setbyuser = 1;
                          if (optlen && ip_options_compile(opt, NULL))
                          {
                                  kfree_s(opt, sizeof(struct options) + optlen);
                                  return -EINVAL;
                          }
                          /*
                           * ANK: I'm afraid that receive handler may change
                           * options from under us.
                           */
                          cli();
                          old_opt = sk->opt;
                          sk->opt = opt;
                          sti();
                          if (old_opt)
                                kfree_s(old_opt, sizeof(struct optlen) + old_opt->optlen);
                          return 0;
                  }
                case IP_TOS:                    /* This sets both TOS and Precedence */
                        if (val & ~0xfe)        /* Reject setting of unused bits */
                                return -EINVAL;
                        if ((val>>5) > 4 && !suser())   /* Only root can set Prec>4 */
                                return -EPERM;
                        sk->ip_tos=val;
                        switch (val & 0x1E) {
                                case IPTOS_LOWDELAY:
                                        sk->priority=SOPRI_INTERACTIVE;
                                        break;
                                case IPTOS_THROUGHPUT:
                                case IPTOS_MINCOST:
                                        sk->priority=SOPRI_BACKGROUND;
                                        break;
                                default:
                                        sk->priority=SOPRI_NORMAL;
                                        break;
                        }
                        return 0;
                case IP_TTL:
                        if(val<1||val>255)
                                return -EINVAL;
                        sk->ip_ttl=val;
                        return 0;
                case IP_HDRINCL:
                        if(sk->type!=SOCK_RAW)
                                return -ENOPROTOOPT;
                        sk->ip_hdrincl=val?1:0;
                        return 0;
#ifdef CONFIG_IP_MULTICAST
                case IP_MULTICAST_TTL:
                {
                        sk->ip_mc_ttl=(int)ucval;
                        return 0;
                }
                case IP_MULTICAST_LOOP:
                {
                        if(ucval!=0 && ucval!=1)
                                 return -EINVAL;
                        sk->ip_mc_loop=(int)ucval;
                        return 0;
                }
                case IP_MULTICAST_IF:
                {
                        struct in_addr addr;
                        struct device *dev=NULL;
 
                        /*
                         *      Check the arguments are allowable
                         */
 
                        err=verify_area(VERIFY_READ, optval, sizeof(addr));
                        if(err)
                                return err;
 
                        memcpy_fromfs(&addr,optval,sizeof(addr));
 
 
                        /*
                         *      What address has been requested
                         */
 
                        if(addr.s_addr==INADDR_ANY)     /* Default */
                        {
                                sk->ip_mc_name[0]=0;
                                return 0;
                        }
 
                        /*
                         *      Find the device
                         */
 
                        dev=ip_mc_find_devfor(addr.s_addr);
 
                        /*
                         *      Did we find one
                         */
 
                        if(dev)
                        {
                                strcpy(sk->ip_mc_name,dev->name);
                                return 0;
                        }
                        return -EADDRNOTAVAIL;
                }
 
                case IP_ADD_MEMBERSHIP:
                {
 
/*
 *      FIXME: Add/Del membership should have a semaphore protecting them from re-entry
 */
                        struct ip_mreq mreq;
                        struct rtable *rt;
                        struct device *dev=NULL;
 
                        /*
                         *      Check the arguments.
                         */
 
                        err=verify_area(VERIFY_READ, optval, sizeof(mreq));
                        if(err)
                                return err;
 
                        memcpy_fromfs(&mreq,optval,sizeof(mreq));
 
                        /*
                         *      Get device for use later
                         */
 
                        if(mreq.imr_interface.s_addr==INADDR_ANY)
                        {
                                /*
                                 *      Not set so scan.
                                 */
                                if((rt=ip_rt_route(mreq.imr_multiaddr.s_addr,0,sk->bound_device))!=NULL)
                                {
                                        dev=rt->rt_dev;
                                        atomic_dec(&rt->rt_use);
                                        ip_rt_put(rt);
                                }
                        }
                        else
                        {
                                /*
                                 *      Find a suitable device.
                                 */
 
                                dev=ip_mc_find_devfor(mreq.imr_interface.s_addr);
                        }
 
                        /*
                         *      No device, no cookies.
                         */
 
                        if(!dev)
                                return -ENODEV;
 
                        /*
                         *      Join group.
                         */
 
                        return ip_mc_join_group(sk,dev,mreq.imr_multiaddr.s_addr);
                }
 
                case IP_DROP_MEMBERSHIP:
                {
                        struct ip_mreq mreq;
                        struct rtable *rt;
                        struct device *dev=NULL;
 
                        /*
                         *      Check the arguments
                         */
 
                        err=verify_area(VERIFY_READ, optval, sizeof(mreq));
                        if(err)
                                return err;
 
                        memcpy_fromfs(&mreq,optval,sizeof(mreq));
 
                        /*
                         *      Get device for use later
                         */
 
                        if(mreq.imr_interface.s_addr==INADDR_ANY)
                        {
                                if((rt=ip_rt_route(mreq.imr_multiaddr.s_addr,0,sk->bound_device))!=NULL)
                                {
                                        dev=rt->rt_dev;
                                        atomic_dec(&rt->rt_use);
                                        ip_rt_put(rt);
                                }
                        }
                        else
                        {
 
                                dev=ip_mc_find_devfor(mreq.imr_interface.s_addr);
                        }
 
                        /*
                         *      Did we find a suitable device.
                         */
 
                        if(!dev)
                                return -ENODEV;
 
                        /*
                         *      Leave group
                         */
 
                        return ip_mc_leave_group(sk,dev,mreq.imr_multiaddr.s_addr);
                }
#endif                  
#ifdef CONFIG_IP_FIREWALL
                case IP_FW_INSERT_IN:
                case IP_FW_INSERT_OUT:
                case IP_FW_INSERT_FWD:
                case IP_FW_APPEND_IN:
                case IP_FW_APPEND_OUT:
                case IP_FW_APPEND_FWD:
                case IP_FW_DELETE_IN:
                case IP_FW_DELETE_OUT:
                case IP_FW_DELETE_FWD:
                case IP_FW_CHECK_IN:
                case IP_FW_CHECK_OUT:
                case IP_FW_CHECK_FWD:
                case IP_FW_FLUSH_IN:
                case IP_FW_FLUSH_OUT:
                case IP_FW_FLUSH_FWD:
                case IP_FW_ZERO_IN:
                case IP_FW_ZERO_OUT:
                case IP_FW_ZERO_FWD:
                case IP_FW_POLICY_IN:
                case IP_FW_POLICY_OUT:
                case IP_FW_POLICY_FWD:
                case IP_FW_MASQ_TIMEOUTS:
                        if(!suser())
                                return -EPERM;
                        if(optlen>sizeof(tmp_fw) || optlen<1)
                                return -EINVAL;
                        err=verify_area(VERIFY_READ,optval,optlen);
                        if(err)
                                return err;
                        memcpy_fromfs(&tmp_fw,optval,optlen);
                        err=ip_fw_ctl(optname, &tmp_fw,optlen);
                        return -err;    /* -0 is 0 after all */
 
#endif
#ifdef CONFIG_IP_MASQUERADE_IPAUTOFW
                case IP_AUTOFW_ADD:
                case IP_AUTOFW_DEL:
                case IP_AUTOFW_FLUSH:
                        if(!suser())
                                return -EPERM;
                        if(optlen>sizeof(tmp_fw) || optlen<1)
                                return -EINVAL;
                        err=verify_area(VERIFY_READ,optval,optlen);
                        if(err)
                                return err;
                        memcpy_fromfs(&tmp_fw,optval,optlen);
                        err=ip_autofw_ctl(optname, &tmp_fw,optlen);
                        return -err;    /* -0 is 0 after all */
 
#endif
#ifdef CONFIG_IP_MASQUERADE_IPPORTFW
               case IP_PORTFW_ADD:
               case IP_PORTFW_DEL:
               case IP_PORTFW_FLUSH:
                       if(!suser())
                               return -EPERM;
                       if(optlen>sizeof(tmp_fw) || optlen<1)
                               return -EINVAL;
                       err=verify_area(VERIFY_READ,optval,optlen);
                       if(err)
                               return err;
                       memcpy_fromfs(&tmp_fw,optval,optlen);
                       err=ip_portfw_ctl(optname, &tmp_fw,optlen);
                       return -err;    /* -0 is 0 after all */
 
#endif
#ifdef CONFIG_IP_ACCT
                case IP_ACCT_INSERT:
                case IP_ACCT_APPEND:
                case IP_ACCT_DELETE:
                case IP_ACCT_FLUSH:
                case IP_ACCT_ZERO:
                        if(!suser())
                                return -EPERM;
                        if(optlen>sizeof(tmp_fw) || optlen<1)
                                return -EINVAL;
                        err=verify_area(VERIFY_READ,optval,optlen);
                        if(err)
                                return err;
                        memcpy_fromfs(&tmp_fw, optval,optlen);
                        err=ip_acct_ctl(optname, &tmp_fw,optlen);
                        return -err;    /* -0 is 0 after all */
#endif
                /* IP_OPTIONS and friends go here eventually */
                default:
                        return(-ENOPROTOOPT);
        }
}
 
/*
 *      Get the options. Note for future reference. The GET of IP options gets the
 *      _received_ ones. The set sets the _sent_ ones.
 */
 
int ip_getsockopt(struct sock *sk, int level, int optname, char *optval, int *optlen)
{
        int val,err;
 
        if(level!=SOL_IP)
                return -EOPNOTSUPP;
 
#ifdef CONFIG_IP_MROUTE
        if(optname>=MRT_BASE && optname <=MRT_BASE+10)
        {
                return ip_mroute_getsockopt(sk,optname,optval,optlen);
        }
#endif
 
        switch(optname)
        {
                case IP_OPTIONS:
                        {
                                unsigned char optbuf[sizeof(struct options)+40];
                                struct options * opt = (struct options*)optbuf;
                                err = verify_area(VERIFY_WRITE, optlen, sizeof(int));
                                if (err)
                                        return err;
                                cli();
                                opt->optlen = 0;
                                if (sk->opt)
                                        memcpy(optbuf, sk->opt, sizeof(struct options)+sk->opt->optlen);
                                sti();
                                if (opt->optlen == 0)
                                {
                                        put_fs_long(0,(unsigned long *) optlen);
                                        return 0;
                                }
                                err = verify_area(VERIFY_WRITE, optval, opt->optlen);
                                if (err)
                                        return err;
/*
 * Now we should undo all the changes done by ip_options_compile().
 */
                                if (opt->srr)
                                {
                                        unsigned  char * optptr = opt->__data+opt->srr-sizeof(struct  iphdr);
                                        memmove(optptr+7, optptr+3, optptr[1]-7);
                                        memcpy(optptr+3, &opt->faddr, 4);
                                }
                                if (opt->rr_needaddr)
                                {
                                        unsigned  char * optptr = opt->__data+opt->rr-sizeof(struct  iphdr);
                                        memset(&optptr[optptr[2]-1], 0, 4);
                                        optptr[2] -= 4;
                                }
                                if (opt->ts)
                                {
                                        unsigned  char * optptr = opt->__data+opt->ts-sizeof(struct  iphdr);
                                        if (opt->ts_needtime)
                                        {
                                                memset(&optptr[optptr[2]-1], 0, 4);
                                                optptr[2] -= 4;
                                        }
                                        if (opt->ts_needaddr)
                                        {
                                                memset(&optptr[optptr[2]-1], 0, 4);
                                                optptr[2] -= 4;
                                        }
                                }
                                put_fs_long(opt->optlen, (unsigned long *) optlen);
                                memcpy_tofs(optval, opt->__data, opt->optlen);
                        }
                        return 0;
                case IP_TOS:
                        val=sk->ip_tos;
                        break;
                case IP_TTL:
                        val=sk->ip_ttl;
                        break;
                case IP_HDRINCL:
                        val=sk->ip_hdrincl;
                        break;
#ifdef CONFIG_IP_MULTICAST                      
                case IP_MULTICAST_TTL:
                        val=sk->ip_mc_ttl;
                        break;
                case IP_MULTICAST_LOOP:
                        val=sk->ip_mc_loop;
                        break;
                case IP_MULTICAST_IF:
                {
                        struct device *dev;
                        struct in_addr ia;
 
                        err=verify_area(VERIFY_WRITE, optlen, sizeof(int));
                        if(err)
                                return err;
                        err=verify_area(VERIFY_WRITE, optval, sizeof(ia));
                        if(err)
                                return err;
 
                        if(*sk->ip_mc_name)
                        {
                                dev=dev_get(sk->ip_mc_name);
                                /* Someone ran off with the interface, its probably
                                   been downed. */
                                if(dev==NULL)
                                        return -ENODEV;
                                ia.s_addr = dev->pa_addr;
                        }
                        else
                                ia.s_addr = 0L;
 
                        put_user(sizeof(ia),(int *) optlen);
                        memcpy_tofs((void *)optval, &ia, sizeof(ia));
                        return 0;
                }
#endif
                default:
                        return(-ENOPROTOOPT);
        }
        err=verify_area(VERIFY_WRITE, optlen, sizeof(int));
        if(err)
                return err;
        put_user(sizeof(int),(int *) optlen);
 
        err=verify_area(VERIFY_WRITE, optval, sizeof(int));
        if(err)
                return err;
        put_user(val,(int *) optval);
 
        return(0);
}

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[/] [or1k_old/] [trunk/] [uclinux/] [uClinux-2.0.x/] [net/] [ipv4/] [ip_sockglue.c] - Blame information for rev 1782

Line No.	Rev	Author	Line
1	199	simons	`/*`
2			`* INET An implementation of the TCP/IP protocol suite for the LINUX`
3			`* operating system. INET is implemented using the BSD Socket`
4			`* interface as the means of communication with the user level.`
5			`*`
6			`* The IP to API glue.`
7			`*`
8			`* Authors: see ip.c`
9			`*`
10			`* Fixes:`
11			`* Many : Split from ip.c , see ip.c for history.`
12			`* Martin Mares : TOS setting fixed.`
13			`* Alan Cox : Fixed a couple of oopses in Martin's`
14			`* TOS tweaks.`
15			`* Elliot Poger : Added support for SO_BINDTODEVICE.`
16			`*/`
17
18
19			`#include <linux/config.h>`
20			`#include <linux/types.h>`
21			`#include <linux/mm.h>`
22			`#include <linux/sched.h>`
23			`#include <linux/skbuff.h>`
24			`#include <linux/ip.h>`
25			`#include <linux/icmp.h>`
26			`#include <linux/netdevice.h>`
27			`#include <net/sock.h>`
28			`#include <net/ip.h>`
29			`#include <net/icmp.h>`
30			`#include <linux/tcp.h>`
31			`#include <linux/udp.h>`
32			`#include <linux/firewall.h>`
33			`#include <linux/ip_fw.h>`
34			`#include <net/checksum.h>`
35			`#include <linux/route.h>`
36			`#include <linux/mroute.h>`
37			`#include <net/route.h>`
38
39			`#include <asm/segment.h>`
40
41			`#ifdef CONFIG_IP_MULTICAST`
42
43			`/*`
44			`* Write an multicast group list table for the IGMP daemon to`
45			`* read.`
46			`*/`
47
48			`int ip_mc_procinfo(char buffer, char *start, off_t offset, int length, int dummy)`
49			`{`
50			`off_t pos=0, begin=0;`
51			`struct ip_mc_list *im;`
52			`unsigned long flags;`
53			`int len=0;`
54			`struct device *dev;`
55
56			`len=sprintf(buffer,"Device : Count\tGroup Users Timer\n");`
57			`save_flags(flags);`
58			`cli();`
59
60			`for(dev = dev_base; dev; dev = dev->next)`
61			`{`
62			`if((dev->flags&IFF_UP)&&(dev->flags&IFF_MULTICAST))`
63			`{`
64			`len+=sprintf(buffer+len,"%-10s: %5d\n",`
65			`dev->name, dev->mc_count);`
66			`for(im = dev->ip_mc_list; im; im = im->next)`
67			`{`
68			`len+=sprintf(buffer+len,`
69			`"\t\t\t%08lX %5d %d:%08lX\n",`
70			`im->multiaddr, im->users,`
71			`im->tm_running, im->timer.expires-jiffies);`
72			`pos=begin+len;`
73			`if(pos<offset)`
74			`{`
75			`len=0;`
76			`begin=pos;`
77			`}`
78			`if(pos>offset+length)`
79			`break;`
80			`}`
81			`}`
82			`}`
83			`restore_flags(flags);`
84			`*start=buffer+(offset-begin);`
85			`len-=(offset-begin);`
86			`if(len>length)`
87			`len=length;`
88			`return len;`
89			`}`
90
91
92			`/*`
93			`* Socket option code for IP. This is the end of the line after any TCP,UDP etc options on`
94			`* an IP socket.`
95			`*`
96			`* We implement IP_TOS (type of service), IP_TTL (time to live).`
97			`*/`
98
99			`static struct device *ip_mc_find_devfor(unsigned long addr)`
100			`{`
101			`struct device *dev;`
102			`for(dev = dev_base; dev; dev = dev->next)`
103			`{`
104			`if((dev->flags&IFF_UP)&&(dev->flags&IFF_MULTICAST)&&`
105			`(dev->pa_addr==addr))`
106			`return dev;`
107			`}`
108
109			`return NULL;`
110			`}`
111
112			`#endif`
113
114			`int ip_setsockopt(struct sock sk, int level, int optname, char optval, int optlen)`
115			`{`
116			`int val,err;`
117			`unsigned char ucval;`
118			`#if defined(CONFIG_IP_FIREWALL) \|\| defined(CONFIG_IP_ACCT)`
119			`struct ip_fw tmp_fw;`
120			`#endif`
121			`if (optval == NULL)`
122			`{`
123			`val=0;`
124			`ucval=0;`
125			`}`
126			`else`
127			`{`
128			`err=verify_area(VERIFY_READ, optval, sizeof(int));`
129			`if(err)`
130			`return err;`
131			`val = get_user((int *) optval);`
132			`ucval=get_user((unsigned char *) optval);`
133			`}`
134
135			`if(level!=SOL_IP)`
136			`return -EOPNOTSUPP;`
137			`#ifdef CONFIG_IP_MROUTE`
138			`if(optname>=MRT_BASE && optname <=MRT_BASE+10)`
139			`{`
140			`return ip_mroute_setsockopt(sk,optname,optval,optlen);`
141			`}`
142			`#endif`
143
144			`switch(optname)`
145			`{`
146			`case IP_OPTIONS:`
147			`{`
148			`struct options * opt = NULL;`
149			`struct options * old_opt;`
150			`if (optlen > 40 \|\| optlen < 0)`
151			`return -EINVAL;`
152			`err = verify_area(VERIFY_READ, optval, optlen);`
153			`if (err)`
154			`return err;`
155			`opt = kmalloc(sizeof(struct options)+((optlen+3)&~3), GFP_KERNEL);`
156			`if (!opt)`
157			`return -ENOMEM;`
158			`memset(opt, 0, sizeof(struct options));`
159			`if (optlen)`
160			`memcpy_fromfs(opt->__data, optval, optlen);`
161			`while (optlen & 3)`
162			`opt->__data[optlen++] = IPOPT_END;`
163			`opt->optlen = optlen;`
164			`opt->is_data = 1;`
165			`opt->is_setbyuser = 1;`
166			`if (optlen && ip_options_compile(opt, NULL))`
167			`{`
168			`kfree_s(opt, sizeof(struct options) + optlen);`
169			`return -EINVAL;`
170			`}`
171			`/*`
172			`* ANK: I'm afraid that receive handler may change`
173			`* options from under us.`
174			`*/`
175			`cli();`
176			`old_opt = sk->opt;`
177			`sk->opt = opt;`
178			`sti();`
179			`if (old_opt)`
180			`kfree_s(old_opt, sizeof(struct optlen) + old_opt->optlen);`
181			`return 0;`
182			`}`
183			`case IP_TOS: /* This sets both TOS and Precedence */`
184			`if (val & ~0xfe) /* Reject setting of unused bits */`
185			`return -EINVAL;`
186			`if ((val>>5) > 4 && !suser()) /* Only root can set Prec>4 */`
187			`return -EPERM;`
188			`sk->ip_tos=val;`
189			`switch (val & 0x1E) {`
190			`case IPTOS_LOWDELAY:`
191			`sk->priority=SOPRI_INTERACTIVE;`
192			`break;`
193			`case IPTOS_THROUGHPUT:`
194			`case IPTOS_MINCOST:`
195			`sk->priority=SOPRI_BACKGROUND;`
196			`break;`
197			`default:`
198			`sk->priority=SOPRI_NORMAL;`
199			`break;`
200			`}`
201			`return 0;`
202			`case IP_TTL:`
203			`if(val<1\|\|val>255)`
204			`return -EINVAL;`
205			`sk->ip_ttl=val;`
206			`return 0;`
207			`case IP_HDRINCL:`
208			`if(sk->type!=SOCK_RAW)`
209			`return -ENOPROTOOPT;`
210			`sk->ip_hdrincl=val?1:0;`
211			`return 0;`
212			`#ifdef CONFIG_IP_MULTICAST`
213			`case IP_MULTICAST_TTL:`
214			`{`
215			`sk->ip_mc_ttl=(int)ucval;`
216			`return 0;`
217			`}`
218			`case IP_MULTICAST_LOOP:`
219			`{`
220			`if(ucval!=0 && ucval!=1)`
221			`return -EINVAL;`
222			`sk->ip_mc_loop=(int)ucval;`
223			`return 0;`
224			`}`
225			`case IP_MULTICAST_IF:`
226			`{`
227			`struct in_addr addr;`
228			`struct device *dev=NULL;`
229
230			`/*`
231			`* Check the arguments are allowable`
232			`*/`
233
234			`err=verify_area(VERIFY_READ, optval, sizeof(addr));`
235			`if(err)`
236			`return err;`
237
238			`memcpy_fromfs(&addr,optval,sizeof(addr));`
239
240
241			`/*`
242			`* What address has been requested`
243			`*/`
244
245			`if(addr.s_addr==INADDR_ANY) /* Default */`
246			`{`
247			`sk->ip_mc_name[0]=0;`
248			`return 0;`
249			`}`
250
251			`/*`
252			`* Find the device`
253			`*/`
254
255			`dev=ip_mc_find_devfor(addr.s_addr);`
256
257			`/*`
258			`* Did we find one`
259			`*/`
260
261			`if(dev)`
262			`{`
263			`strcpy(sk->ip_mc_name,dev->name);`
264			`return 0;`
265			`}`
266			`return -EADDRNOTAVAIL;`
267			`}`
268
269			`case IP_ADD_MEMBERSHIP:`
270			`{`
271
272			`/*`
273			`* FIXME: Add/Del membership should have a semaphore protecting them from re-entry`
274			`*/`
275			`struct ip_mreq mreq;`
276			`struct rtable *rt;`
277			`struct device *dev=NULL;`
278
279			`/*`
280			`* Check the arguments.`
281			`*/`
282
283			`err=verify_area(VERIFY_READ, optval, sizeof(mreq));`
284			`if(err)`
285			`return err;`
286
287			`memcpy_fromfs(&mreq,optval,sizeof(mreq));`
288
289			`/*`
290			`* Get device for use later`
291			`*/`
292
293			`if(mreq.imr_interface.s_addr==INADDR_ANY)`
294			`{`
295			`/*`
296			`* Not set so scan.`
297			`*/`
298			`if((rt=ip_rt_route(mreq.imr_multiaddr.s_addr,0,sk->bound_device))!=NULL)`
299			`{`
300			`dev=rt->rt_dev;`
301			`atomic_dec(&rt->rt_use);`
302			`ip_rt_put(rt);`
303			`}`
304			`}`
305			`else`
306			`{`
307			`/*`
308			`* Find a suitable device.`
309			`*/`
310
311			`dev=ip_mc_find_devfor(mreq.imr_interface.s_addr);`
312			`}`
313
314			`/*`
315			`* No device, no cookies.`
316			`*/`
317
318			`if(!dev)`
319			`return -ENODEV;`
320
321			`/*`
322			`* Join group.`
323			`*/`
324
325			`return ip_mc_join_group(sk,dev,mreq.imr_multiaddr.s_addr);`
326			`}`
327
328			`case IP_DROP_MEMBERSHIP:`
329			`{`
330			`struct ip_mreq mreq;`
331			`struct rtable *rt;`
332			`struct device *dev=NULL;`
333
334			`/*`
335			`* Check the arguments`
336			`*/`
337
338			`err=verify_area(VERIFY_READ, optval, sizeof(mreq));`
339			`if(err)`
340			`return err;`
341
342			`memcpy_fromfs(&mreq,optval,sizeof(mreq));`
343
344			`/*`
345			`* Get device for use later`
346			`*/`
347
348			`if(mreq.imr_interface.s_addr==INADDR_ANY)`
349			`{`
350			`if((rt=ip_rt_route(mreq.imr_multiaddr.s_addr,0,sk->bound_device))!=NULL)`
351			`{`
352			`dev=rt->rt_dev;`
353			`atomic_dec(&rt->rt_use);`
354			`ip_rt_put(rt);`
355			`}`
356			`}`
357			`else`
358			`{`
359
360			`dev=ip_mc_find_devfor(mreq.imr_interface.s_addr);`
361			`}`
362
363			`/*`
364			`* Did we find a suitable device.`
365			`*/`
366
367			`if(!dev)`
368			`return -ENODEV;`
369
370			`/*`
371			`* Leave group`
372			`*/`
373
374			`return ip_mc_leave_group(sk,dev,mreq.imr_multiaddr.s_addr);`
375			`}`
376			`#endif`
377			`#ifdef CONFIG_IP_FIREWALL`
378			`case IP_FW_INSERT_IN:`
379			`case IP_FW_INSERT_OUT:`
380			`case IP_FW_INSERT_FWD:`
381			`case IP_FW_APPEND_IN:`
382			`case IP_FW_APPEND_OUT:`
383			`case IP_FW_APPEND_FWD:`
384			`case IP_FW_DELETE_IN:`
385			`case IP_FW_DELETE_OUT:`
386			`case IP_FW_DELETE_FWD:`
387			`case IP_FW_CHECK_IN:`
388			`case IP_FW_CHECK_OUT:`
389			`case IP_FW_CHECK_FWD:`
390			`case IP_FW_FLUSH_IN:`
391			`case IP_FW_FLUSH_OUT:`
392			`case IP_FW_FLUSH_FWD:`
393			`case IP_FW_ZERO_IN:`
394			`case IP_FW_ZERO_OUT:`
395			`case IP_FW_ZERO_FWD:`
396			`case IP_FW_POLICY_IN:`
397			`case IP_FW_POLICY_OUT:`
398			`case IP_FW_POLICY_FWD:`
399			`case IP_FW_MASQ_TIMEOUTS:`
400			`if(!suser())`
401			`return -EPERM;`
402			`if(optlen>sizeof(tmp_fw) \|\| optlen<1)`
403			`return -EINVAL;`
404			`err=verify_area(VERIFY_READ,optval,optlen);`
405			`if(err)`
406			`return err;`
407			`memcpy_fromfs(&tmp_fw,optval,optlen);`
408			`err=ip_fw_ctl(optname, &tmp_fw,optlen);`
409			`return -err; /* -0 is 0 after all */`
410
411			`#endif`
412			`#ifdef CONFIG_IP_MASQUERADE_IPAUTOFW`
413			`case IP_AUTOFW_ADD:`
414			`case IP_AUTOFW_DEL:`
415			`case IP_AUTOFW_FLUSH:`
416			`if(!suser())`
417			`return -EPERM;`
418			`if(optlen>sizeof(tmp_fw) \|\| optlen<1)`
419			`return -EINVAL;`
420			`err=verify_area(VERIFY_READ,optval,optlen);`
421			`if(err)`
422			`return err;`
423			`memcpy_fromfs(&tmp_fw,optval,optlen);`
424			`err=ip_autofw_ctl(optname, &tmp_fw,optlen);`
425			`return -err; /* -0 is 0 after all */`
426
427			`#endif`
428			`#ifdef CONFIG_IP_MASQUERADE_IPPORTFW`
429			`case IP_PORTFW_ADD:`
430			`case IP_PORTFW_DEL:`
431			`case IP_PORTFW_FLUSH:`
432			`if(!suser())`
433			`return -EPERM;`
434			`if(optlen>sizeof(tmp_fw) \|\| optlen<1)`
435			`return -EINVAL;`
436			`err=verify_area(VERIFY_READ,optval,optlen);`
437			`if(err)`
438			`return err;`
439			`memcpy_fromfs(&tmp_fw,optval,optlen);`
440			`err=ip_portfw_ctl(optname, &tmp_fw,optlen);`
441			`return -err; /* -0 is 0 after all */`
442
443			`#endif`
444			`#ifdef CONFIG_IP_ACCT`
445			`case IP_ACCT_INSERT:`
446			`case IP_ACCT_APPEND:`
447			`case IP_ACCT_DELETE:`
448			`case IP_ACCT_FLUSH:`
449			`case IP_ACCT_ZERO:`
450			`if(!suser())`
451			`return -EPERM;`
452			`if(optlen>sizeof(tmp_fw) \|\| optlen<1)`
453			`return -EINVAL;`
454			`err=verify_area(VERIFY_READ,optval,optlen);`
455			`if(err)`
456			`return err;`
457			`memcpy_fromfs(&tmp_fw, optval,optlen);`
458			`err=ip_acct_ctl(optname, &tmp_fw,optlen);`
459			`return -err; /* -0 is 0 after all */`
460			`#endif`
461			`/* IP_OPTIONS and friends go here eventually */`
462			`default:`
463			`return(-ENOPROTOOPT);`
464			`}`
465			`}`
466
467			`/*`
468			`* Get the options. Note for future reference. The GET of IP options gets the`
469			`* _received_ ones. The set sets the _sent_ ones.`
470			`*/`
471
472			`int ip_getsockopt(struct sock sk, int level, int optname, char optval, int *optlen)`
473			`{`
474			`int val,err;`
475
476			`if(level!=SOL_IP)`
477			`return -EOPNOTSUPP;`
478
479			`#ifdef CONFIG_IP_MROUTE`
480			`if(optname>=MRT_BASE && optname <=MRT_BASE+10)`
481			`{`
482			`return ip_mroute_getsockopt(sk,optname,optval,optlen);`
483			`}`
484			`#endif`
485
486			`switch(optname)`
487			`{`
488			`case IP_OPTIONS:`
489			`{`
490			`unsigned char optbuf[sizeof(struct options)+40];`
491			`struct options * opt = (struct options*)optbuf;`
492			`err = verify_area(VERIFY_WRITE, optlen, sizeof(int));`
493			`if (err)`
494			`return err;`
495			`cli();`
496			`opt->optlen = 0;`
497			`if (sk->opt)`
498			`memcpy(optbuf, sk->opt, sizeof(struct options)+sk->opt->optlen);`
499			`sti();`
500			`if (opt->optlen == 0)`
501			`{`
502			`put_fs_long(0,(unsigned long *) optlen);`
503			`return 0;`
504			`}`
505			`err = verify_area(VERIFY_WRITE, optval, opt->optlen);`
506			`if (err)`
507			`return err;`
508			`/*`
509			`* Now we should undo all the changes done by ip_options_compile().`
510			`*/`
511			`if (opt->srr)`
512			`{`
513			`unsigned char * optptr = opt->__data+opt->srr-sizeof(struct iphdr);`
514			`memmove(optptr+7, optptr+3, optptr[1]-7);`
515			`memcpy(optptr+3, &opt->faddr, 4);`
516			`}`
517			`if (opt->rr_needaddr)`
518			`{`
519			`unsigned char * optptr = opt->__data+opt->rr-sizeof(struct iphdr);`
520			`memset(&optptr[optptr[2]-1], 0, 4);`
521			`optptr[2] -= 4;`
522			`}`
523			`if (opt->ts)`
524			`{`
525			`unsigned char * optptr = opt->__data+opt->ts-sizeof(struct iphdr);`
526			`if (opt->ts_needtime)`
527			`{`
528			`memset(&optptr[optptr[2]-1], 0, 4);`
529			`optptr[2] -= 4;`
530			`}`
531			`if (opt->ts_needaddr)`
532			`{`
533			`memset(&optptr[optptr[2]-1], 0, 4);`
534			`optptr[2] -= 4;`
535			`}`
536			`}`
537			`put_fs_long(opt->optlen, (unsigned long *) optlen);`
538			`memcpy_tofs(optval, opt->__data, opt->optlen);`
539			`}`
540			`return 0;`
541			`case IP_TOS:`
542			`val=sk->ip_tos;`
543			`break;`
544			`case IP_TTL:`
545			`val=sk->ip_ttl;`
546			`break;`
547			`case IP_HDRINCL:`
548			`val=sk->ip_hdrincl;`
549			`break;`
550			`#ifdef CONFIG_IP_MULTICAST`
551			`case IP_MULTICAST_TTL:`
552			`val=sk->ip_mc_ttl;`
553			`break;`
554			`case IP_MULTICAST_LOOP:`
555			`val=sk->ip_mc_loop;`
556			`break;`
557			`case IP_MULTICAST_IF:`
558			`{`
559			`struct device *dev;`
560			`struct in_addr ia;`
561
562			`err=verify_area(VERIFY_WRITE, optlen, sizeof(int));`
563			`if(err)`
564			`return err;`
565			`err=verify_area(VERIFY_WRITE, optval, sizeof(ia));`
566			`if(err)`
567			`return err;`
568
569			`if(*sk->ip_mc_name)`
570			`{`
571			`dev=dev_get(sk->ip_mc_name);`
572			`/* Someone ran off with the interface, its probably`
573			`been downed. */`
574			`if(dev==NULL)`
575			`return -ENODEV;`
576			`ia.s_addr = dev->pa_addr;`
577			`}`
578			`else`
579			`ia.s_addr = 0L;`
580
581			`put_user(sizeof(ia),(int *) optlen);`
582			`memcpy_tofs((void *)optval, &ia, sizeof(ia));`
583			`return 0;`
584			`}`
585			`#endif`
586			`default:`
587			`return(-ENOPROTOOPT);`
588			`}`
589			`err=verify_area(VERIFY_WRITE, optlen, sizeof(int));`
590			`if(err)`
591			`return err;`
592			`put_user(sizeof(int),(int *) optlen);`
593
594			`err=verify_area(VERIFY_WRITE, optval, sizeof(int));`
595			`if(err)`
596			`return err;`
597			`put_user(val,(int *) optval);`
598
599			`return(0);`
600			`}`