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kamailio/ip_addr.h

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/* $Id$
*
* ip address family related structures
*
* Copyright (C) 2001-2003 FhG Fokus
*
* This file is part of ser, a free SIP server.
*
* ser is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version
*
* For a license to use the ser software under conditions
* other than those described here, or to purchase support for this
* software, please contact iptel.org by e-mail at the following addresses:
* info@iptel.org
*
* ser is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
* History:
* --------
* 2003-02-13 added struct dest_info (andrei)
* 2003-04-06 all ports are stored/passed in host byte order now (andrei)
* 2006-04-20 comp support in recv_info and dest_info (andrei)
* 2006-04-21 added init_dst_from_rcv (andrei)
* 2007-06-26 added ip_addr_mk_any() (andrei)
* 2008-05-21 added su2a(), ip_addr2sbuf(), ip4tosbuf(), ip62sbuf() (andrei)
* 2009-09-14 added send flags support to dest_info (andrei)
*/
#ifndef ip_addr_h
#define ip_addr_h
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include "str.h"
#include "compiler_opt.h"
#include "ut.h"
#include "dprint.h"
enum sip_protos { PROTO_NONE, PROTO_UDP, PROTO_TCP, PROTO_TLS, PROTO_SCTP, PROTO_WS, PROTO_WSS, PROTO_OTHER };
#define PROTO_LAST PROTO_OTHER
#ifdef USE_COMP
enum comp_methods { COMP_NONE, COMP_SIGCOMP, COMP_SERGZ };
#endif
struct ip_addr{
unsigned int af; /* address family: AF_INET6 or AF_INET */
unsigned int len; /* address len, 16 or 4 */
/* 64 bits aligned address */
union {
unsigned long addrl[16/sizeof(long)]; /* long format*/
unsigned int addr32[4];
unsigned short addr16[8];
unsigned char addr[16];
}u;
};
typedef struct ip_addr ip_addr_t;
struct net{
struct ip_addr ip;
struct ip_addr mask;
};
union sockaddr_union{
struct sockaddr s;
struct sockaddr_in sin;
struct sockaddr_in6 sin6;
};
enum si_flags { SI_NONE=0, SI_IS_IP=1, SI_IS_LO=2, SI_IS_MCAST=4,
SI_IS_ANY=8, SI_IS_MHOMED=16 };
struct addr_info{
str name; /* name - eg.: foo.bar or 10.0.0.1 */
struct ip_addr address; /*ip address */
str address_str; /*ip address converted to string -- optimization*/
enum si_flags flags; /* SI_IS_IP | SI_IS_LO | SI_IS_MCAST */
union sockaddr_union su;
struct addr_info* next;
struct addr_info* prev;
};
struct advertise_info {
str name; /* name - eg.: foo.bar or 10.0.0.1 */
unsigned short port_no; /* port number */
str port_no_str; /* port number converted to string -- optimization*/
str address_str; /*ip address converted to string -- optimization*/
struct ip_addr address; /* ip address */
str sock_str; /* Socket proto, ip, and port as string */
};
struct socket_info{
int socket;
str name; /* name - eg.: foo.bar or 10.0.0.1 */
struct ip_addr address; /* ip address */
str address_str; /*ip address converted to string -- optimization*/
str port_no_str; /* port number converted to string -- optimization*/
enum si_flags flags; /* SI_IS_IP | SI_IS_LO | SI_IS_MCAST */
union sockaddr_union su;
struct socket_info* next;
struct socket_info* prev;
unsigned short port_no; /* port number */
char proto; /* tcp or udp*/
str sock_str; /* Socket proto, ip, and port as string */
struct addr_info* addr_info_lst; /* extra addresses (e.g. SCTP mh) */
int workers; /* number of worker processes for this socket */
int workers_tcpidx; /* index of workers in tcp children array */
struct advertise_info useinfo; /* details to be used in SIP msg */
};
struct receive_info{
struct ip_addr src_ip;
struct ip_addr dst_ip;
unsigned short src_port; /* host byte order */
unsigned short dst_port; /* host byte order */
int proto_reserved1; /* tcp stores the connection id here */
int proto_reserved2;
union sockaddr_union src_su; /* useful for replies*/
struct socket_info* bind_address; /* sock_info structure on which
the msg was received*/
char proto;
#ifdef USE_COMP
short comp; /* compression */
#endif
/* no need for dst_su yet */
};
/* send flags */
#define SND_F_FORCE_CON_REUSE 1 /* reuse an existing connection or fail */
#define SND_F_CON_CLOSE 2 /* close the connection after sending */
#define SND_F_FORCE_SOCKET 4 /* send socket in dst is forced */
struct snd_flags {
unsigned char f; /* snd flags */
unsigned char blst_imask; /* blacklist ignore mask */
};
typedef struct snd_flags snd_flags_t;
#define SND_FLAGS_INIT(sflags) \
do{ \
(sflags)->f=0; \
(sflags)->blst_imask=0; \
}while(0)
#define SND_FLAGS_OR(dst, src1, src2) \
do{ \
(dst)->f = (src1)->f | (src2)->f; \
(dst)->blst_imask = (src1)->blst_imask | (src2)->blst_imask; \
}while(0)
#define SND_FLAGS_AND(dst, src1, src2) \
do{ \
(dst)->f = (src1)->f & (src2)->f; \
(dst)->blst_imask = (src1)->blst_imask & (src2)->blst_imask; \
}while(0)
struct dest_info{
struct socket_info* send_sock;
union sockaddr_union to;
int id; /* tcp stores the connection id here */
char proto;
snd_flags_t send_flags;
#ifdef USE_COMP
short comp;
#endif
};
/* list of names for multi-homed sockets that need to bind on
* multiple addresses in the same time (sctp ) */
struct name_lst{
char* name;
struct name_lst* next;
int flags;
};
struct socket_id{
struct name_lst* addr_lst; /* address list, the first one must
be present and is the main one
(in case of multihoming sctp)*/
int flags;
int proto;
int port;
struct socket_id* next;
};
/* len of the sockaddr */
#ifdef HAVE_SOCKADDR_SA_LEN
#define sockaddru_len(su) ((su).s.sa_len)
#else
#define sockaddru_len(su) \
(((su).s.sa_family==AF_INET6)?sizeof(struct sockaddr_in6):\
sizeof(struct sockaddr_in))
#endif /* HAVE_SOCKADDR_SA_LEN*/
/* inits an ip_addr with the addr. info from a hostent structure
* ip = struct ip_addr*
* he= struct hostent*
*/
#define hostent2ip_addr(ip, he, addr_no) \
do{ \
(ip)->af=(he)->h_addrtype; \
(ip)->len=(he)->h_length; \
memcpy((ip)->u.addr, (he)->h_addr_list[(addr_no)], (ip)->len); \
}while(0)
/* gets the protocol family corresponding to a specific address family
* ( PF_INET - AF_INET, PF_INET6 - AF_INET6, af for others)
*/
#define AF2PF(af) (((af)==AF_INET)?PF_INET:((af)==AF_INET6)?PF_INET6:(af))
struct net* mk_new_net(struct ip_addr* ip, struct ip_addr* mask);
struct net* mk_new_net_bitlen(struct ip_addr* ip, unsigned int bitlen);
int mk_net(struct net* n, struct ip_addr* ip, struct ip_addr* mask);
int mk_net_bitlen(struct net* n, struct ip_addr* ip, unsigned int bitlen);
int mk_net_str(struct net* dst, str* s);
void print_ip(char* prefix, struct ip_addr* ip, char* suffix);
void stdout_print_ip(struct ip_addr* ip);
void print_net(struct net* net);
char* get_proto_name(unsigned int proto);
#define proto2a get_proto_name
#ifdef USE_MCAST
/* Returns 1 if the given address is a multicast address */
int is_mcast(struct ip_addr* ip);
#endif /* USE_MCAST */
/* returns 1 if the given ip address is INADDR_ANY or IN6ADDR_ANY,
* 0 otherwise */
inline static int ip_addr_any(struct ip_addr* ip)
{
int r;
int l;
l=ip->len/4;
for (r=0; r<l; r++)
if (ip->u.addr32[r]!=0)
return 0;
return 1;
}
/* returns 1 if the given ip address is a loopback address
* 0 otherwise */
inline static int ip_addr_loopback(struct ip_addr* ip)
{
if (ip->af==AF_INET)
return ip->u.addr32[0]==htonl(INADDR_LOOPBACK);
else if (ip->af==AF_INET6)
return IN6_IS_ADDR_LOOPBACK((struct in6_addr*)ip->u.addr32);
return 0;
}
/* creates an ANY ip_addr (filled with 0, af and len properly set) */
inline static void ip_addr_mk_any(int af, struct ip_addr* ip)
{
ip->af=af;
if (likely(af==AF_INET)){
ip->len=4;
ip->u.addr32[0]=0;
}
else{
ip->len=16;
#if (defined (ULONG_MAX) && ULONG_MAX > 4294967295) || defined LP64
/* long is 64 bits */
ip->u.addrl[0]=0;
ip->u.addrl[1]=0;
#else
ip->u.addr32[0]=0;
ip->u.addr32[1]=0;
ip->u.addr32[2]=0;
ip->u.addr32[3]=0;
#endif /* ULONG_MAX */
}
}
/* returns 1 if ip & net.mask == net.ip ; 0 otherwise & -1 on error
[ diff. address families ]) */
inline static int matchnet(struct ip_addr* ip, struct net* net)
{
unsigned int r;
if (ip->af == net->ip.af){
for(r=0; r<ip->len/4; r++){ /* ipv4 & ipv6 addresses are
all multiple of 4*/
if ((ip->u.addr32[r]&net->mask.u.addr32[r])!=
net->ip.u.addr32[r]){
return 0;
}
}
return 1;
};
return -1;
}
/* inits an ip_addr pointer from a sockaddr structure*/
static inline void sockaddr2ip_addr(struct ip_addr* ip, struct sockaddr* sa)
{
switch(sa->sa_family){
case AF_INET:
ip->af=AF_INET;
ip->len=4;
memcpy(ip->u.addr, &((struct sockaddr_in*)sa)->sin_addr, 4);
break;
case AF_INET6:
ip->af=AF_INET6;
ip->len=16;
memcpy(ip->u.addr, &((struct sockaddr_in6*)sa)->sin6_addr, 16);
break;
default:
LOG(L_CRIT, "sockaddr2ip_addr: BUG: unknown address family %d\n",
sa->sa_family);
}
}
/* compare 2 ip_addrs (both args are pointers)*/
#define ip_addr_cmp(ip1, ip2) \
(((ip1)->af==(ip2)->af)&& \
(memcmp((ip1)->u.addr, (ip2)->u.addr, (ip1)->len)==0))
/* compare 2 sockaddr_unions */
static inline int su_cmp(const union sockaddr_union* s1,
const union sockaddr_union* s2)
{
if (s1->s.sa_family!=s2->s.sa_family) return 0;
switch(s1->s.sa_family){
case AF_INET:
return (s1->sin.sin_port==s2->sin.sin_port)&&
(memcmp(&s1->sin.sin_addr, &s2->sin.sin_addr, 4)==0);
case AF_INET6:
return (s1->sin6.sin6_port==s2->sin6.sin6_port)&&
(memcmp(&s1->sin6.sin6_addr, &s2->sin6.sin6_addr, 16)==0);
default:
LOG(L_CRIT,"su_cmp: BUG: unknown address family %d\n",
s1->s.sa_family);
return 0;
}
}
/* gets the port number (host byte order) */
static inline unsigned short su_getport(const union sockaddr_union* su)
{
switch(su->s.sa_family){
case AF_INET:
return ntohs(su->sin.sin_port);
case AF_INET6:
return ntohs(su->sin6.sin6_port);
default:
LOG(L_CRIT,"su_get_port: BUG: unknown address family %d\n",
su->s.sa_family);
return 0;
}
}
/* sets the port number (host byte order) */
static inline void su_setport(union sockaddr_union* su, unsigned short port)
{
switch(su->s.sa_family){
case AF_INET:
su->sin.sin_port=htons(port);
break;
case AF_INET6:
su->sin6.sin6_port=htons(port);
break;
default:
LOG(L_CRIT,"su_set_port: BUG: unknown address family %d\n",
su->s.sa_family);
}
}
/* inits an ip_addr pointer from a sockaddr_union ip address */
static inline void su2ip_addr(struct ip_addr* ip, union sockaddr_union* su)
{
switch(su->s.sa_family){
case AF_INET:
ip->af=AF_INET;
ip->len=4;
memcpy(ip->u.addr, &su->sin.sin_addr, 4);
break;
case AF_INET6:
ip->af=AF_INET6;
ip->len=16;
memcpy(ip->u.addr, &su->sin6.sin6_addr, 16);
break;
default:
LOG(L_CRIT,"su2ip_addr: BUG: unknown address family %d\n",
su->s.sa_family);
}
}
/* ip_addr2su -> the same as init_su*/
#define ip_addr2su init_su
/* inits a struct sockaddr_union from a struct ip_addr and a port no
* returns 0 if ok, -1 on error (unknown address family)
* the port number is in host byte order */
static inline int init_su( union sockaddr_union* su,
struct ip_addr* ip,
unsigned short port )
{
memset(su, 0, sizeof(union sockaddr_union));/*needed on freebsd*/
su->s.sa_family=ip->af;
switch(ip->af){
case AF_INET6:
memcpy(&su->sin6.sin6_addr, ip->u.addr, ip->len);
#ifdef HAVE_SOCKADDR_SA_LEN
su->sin6.sin6_len=sizeof(struct sockaddr_in6);
#endif
su->sin6.sin6_port=htons(port);
break;
case AF_INET:
memcpy(&su->sin.sin_addr, ip->u.addr, ip->len);
#ifdef HAVE_SOCKADDR_SA_LEN
su->sin.sin_len=sizeof(struct sockaddr_in);
#endif
su->sin.sin_port=htons(port);
break;
default:
LOG(L_CRIT, "init_ss: BUG: unknown address family %d\n", ip->af);
return -1;
}
return 0;
}
/* inits a struct sockaddr_union from a struct hostent, an address index in
* the hostent structure and a port no. (host byte order)
* WARNING: no index overflow checks!
* returns 0 if ok, -1 on error (unknown address family) */
static inline int hostent2su( union sockaddr_union* su,
struct hostent* he,
unsigned int idx,
unsigned short port )
{
memset(su, 0, sizeof(union sockaddr_union)); /*needed on freebsd*/
su->s.sa_family=he->h_addrtype;
switch(he->h_addrtype){
case AF_INET6:
memcpy(&su->sin6.sin6_addr, he->h_addr_list[idx], he->h_length);
#ifdef HAVE_SOCKADDR_SA_LEN
su->sin6.sin6_len=sizeof(struct sockaddr_in6);
#endif
su->sin6.sin6_port=htons(port);
break;
case AF_INET:
memcpy(&su->sin.sin_addr, he->h_addr_list[idx], he->h_length);
#ifdef HAVE_SOCKADDR_SA_LEN
su->sin.sin_len=sizeof(struct sockaddr_in);
#endif
su->sin.sin_port=htons(port);
break;
default:
LOG(L_CRIT, "hostent2su: BUG: unknown address family %d\n",
he->h_addrtype);
return -1;
}
return 0;
}
/* maximum size of a str returned by ip_addr2str */
#define IP6_MAX_STR_SIZE 39 /*1234:5678:9012:3456:7890:1234:5678:9012*/
#define IP4_MAX_STR_SIZE 15 /*123.456.789.012*/
/* converts a raw ipv6 addr (16 bytes) to ascii */
static inline int ip6tosbuf(unsigned char* ip6, char* buff, int len)
{
int offset;
register unsigned char a,b,c;
register unsigned char d;
register unsigned short hex4;
int r;
#define HEXDIG(x) (((x)>=10)?(x)-10+'A':(x)+'0')
offset=0;
if (unlikely(len<IP6_MAX_STR_SIZE))
return 0;
for(r=0;r<7;r++){
hex4=((unsigned char)ip6[r*2]<<8)+(unsigned char)ip6[r*2+1];
a=hex4>>12;
b=(hex4>>8)&0xf;
c=(hex4>>4)&0xf;
d=hex4&0xf;
if (a){
buff[offset]=HEXDIG(a);
buff[offset+1]=HEXDIG(b);
buff[offset+2]=HEXDIG(c);
buff[offset+3]=HEXDIG(d);
buff[offset+4]=':';
offset+=5;
}else if(b){
buff[offset]=HEXDIG(b);
buff[offset+1]=HEXDIG(c);
buff[offset+2]=HEXDIG(d);
buff[offset+3]=':';
offset+=4;
}else if(c){
buff[offset]=HEXDIG(c);
buff[offset+1]=HEXDIG(d);
buff[offset+2]=':';
offset+=3;
}else{
buff[offset]=HEXDIG(d);
buff[offset+1]=':';
offset+=2;
}
}
/* last int16*/
hex4=((unsigned char)ip6[r*2]<<8)+(unsigned char)ip6[r*2+1];
a=hex4>>12;
b=(hex4>>8)&0xf;
c=(hex4>>4)&0xf;
d=hex4&0xf;
if (a){
buff[offset]=HEXDIG(a);
buff[offset+1]=HEXDIG(b);
buff[offset+2]=HEXDIG(c);
buff[offset+3]=HEXDIG(d);
offset+=4;
}else if(b){
buff[offset]=HEXDIG(b);
buff[offset+1]=HEXDIG(c);
buff[offset+2]=HEXDIG(d);
offset+=3;
}else if(c){
buff[offset]=HEXDIG(c);
buff[offset+1]=HEXDIG(d);
offset+=2;
}else{
buff[offset]=HEXDIG(d);
offset+=1;
}
return offset;
}
/* converts a raw ipv4 addr (4 bytes) to ascii */
static inline int ip4tosbuf(unsigned char* ip4, char* buff, int len)
{
int offset;
register unsigned char a,b,c;
int r;
offset=0;
if (unlikely(len<IP4_MAX_STR_SIZE))
return 0;
for(r=0;r<3;r++){
a=(unsigned char)ip4[r]/100;
c=(unsigned char)ip4[r]%10;
b=(unsigned char)ip4[r]%100/10;
if (a){
buff[offset]=a+'0';
buff[offset+1]=b+'0';
buff[offset+2]=c+'0';
buff[offset+3]='.';
offset+=4;
}else if (b){
buff[offset]=b+'0';
buff[offset+1]=c+'0';
buff[offset+2]='.';
offset+=3;
}else{
buff[offset]=c+'0';
buff[offset+1]='.';
offset+=2;
}
}
/* last number */
a=(unsigned char)ip4[r]/100;
c=(unsigned char)ip4[r]%10;
b=(unsigned char)ip4[r]%100/10;
if (a){
buff[offset]=a+'0';
buff[offset+1]=b+'0';
buff[offset+2]=c+'0';
offset+=3;
}else if (b){
buff[offset]=b+'0';
buff[offset+1]=c+'0';
offset+=2;
}else{
buff[offset]=c+'0';
offset+=1;
}
return offset;
}
/* fast ip_addr -> string converter;
* returns number of bytes written in buf on success, <=0 on error
* The buffer must have enough space to hold the maximum size ip address
* of the corresponding address (see IP[46] above) or else the function
* will return error (no detailed might fit checks are made, for example
* if len==7 the function will fail even for 1.2.3.4).
*/
static inline int ip_addr2sbuf(struct ip_addr* ip, char* buff, int len)
{
switch(ip->af){
case AF_INET6:
return ip6tosbuf(ip->u.addr, buff, len);
break;
case AF_INET:
return ip4tosbuf(ip->u.addr, buff, len);
break;
default:
LOG(L_CRIT, "BUG: ip_addr2sbuf: unknown address family %d\n",
ip->af);
return 0;
}
return 0;
}
/* maximum size of a str returned by ip_addr2a (including \0) */
#define IP_ADDR_MAX_STR_SIZE (IP6_MAX_STR_SIZE+1) /* ip62ascii + \0*/
/* fast ip_addr -> string converter;
* it uses an internal buffer
*/
static inline char* ip_addr2a(struct ip_addr* ip)
{
static char buff[IP_ADDR_MAX_STR_SIZE];
int len;
len=ip_addr2sbuf(ip, buff, sizeof(buff)-1);
buff[len]=0;
return buff;
}
#define SU2A_MAX_STR_SIZE (IP6_MAX_STR_SIZE + 2 /* [] */+\
1 /* : */ + USHORT2SBUF_MAX_LEN + 1 /* \0 */)
/* returns an asciiz string containing the ip and the port
* (<ip_addr>:port or [<ipv6_addr>]:port)
*/
static inline char* su2a(union sockaddr_union* su, int su_len)
{
static char buf[SU2A_MAX_STR_SIZE];
int offs;
if (unlikely(su->s.sa_family==AF_INET6)){
if (unlikely(su_len<sizeof(su->sin6)))
return "<addr. error>";
buf[0]='[';
offs=1+ip6tosbuf((unsigned char*)su->sin6.sin6_addr.s6_addr, &buf[1],
sizeof(buf)-4);
buf[offs]=']';
offs++;
}else
if (unlikely(su_len<sizeof(su->sin)))
return "<addr. error>";
else
offs=ip4tosbuf((unsigned char*)&su->sin.sin_addr, buf, sizeof(buf)-2);
buf[offs]=':';
offs+=1+ushort2sbuf(su_getport(su), &buf[offs+1], sizeof(buf)-(offs+1)-1);
buf[offs]=0;
return buf;
}
#define SUIP2A_MAX_STR_SIZE (IP6_MAX_STR_SIZE + 2 /* [] */ + 1 /* \0 */)
/* returns an asciiz string containing the ip
* (<ipv4_addr> or [<ipv6_addr>])
*/
static inline char* suip2a(union sockaddr_union* su, int su_len)
{
static char buf[SUIP2A_MAX_STR_SIZE];
int offs;
if (unlikely(su->s.sa_family==AF_INET6)){
if (unlikely(su_len<sizeof(su->sin6)))
return "<addr. error>";
buf[0]='[';
offs=1+ip6tosbuf((unsigned char*)su->sin6.sin6_addr.s6_addr, &buf[1],
sizeof(buf)-4);
buf[offs]=']';
offs++;
}else
if (unlikely(su_len<sizeof(su->sin)))
return "<addr. error>";
else
offs=ip4tosbuf((unsigned char*)&su->sin.sin_addr, buf, sizeof(buf)-2);
buf[offs]=0;
return buf;
}
/* converts an ip_addr structure to a hostent, returns pointer to internal
* statical structure */
static inline struct hostent* ip_addr2he(str* name, struct ip_addr* ip)
{
static struct hostent he;
static char hostname[256];
static char* p_aliases[1];
static char* p_addr[2];
static char address[16];
p_aliases[0]=0; /* no aliases*/
p_addr[1]=0; /* only one address*/
p_addr[0]=address;
strncpy(hostname, name->s, (name->len<256)?(name->len)+1:256);
if (ip->len>16) return 0;
memcpy(address, ip->u.addr, ip->len);
he.h_addrtype=ip->af;
he.h_length=ip->len;
he.h_addr_list=p_addr;
he.h_aliases=p_aliases;
he.h_name=hostname;
return &he;
}
/* init a dest_info structure */
#define init_dest_info(dst) \
do{ \
memset((dst), 0, sizeof(struct dest_info)); \
} while(0)
/* init a dest_info structure from a recv_info structure */
inline static void init_dst_from_rcv(struct dest_info* dst,
struct receive_info* rcv)
{
dst->send_sock=rcv->bind_address;
dst->to=rcv->src_su;
dst->id=rcv->proto_reserved1;
dst->proto=rcv->proto;
dst->send_flags.f=0;
dst->send_flags.blst_imask=0;
#ifdef USE_COMP
dst->comp=rcv->comp;
#endif
}
/**
* match ip address with net address and bitmask
* - return 0 on match, -1 otherwise
*/
int ip_addr_match_net(ip_addr_t *iaddr, ip_addr_t *naddr, int mask);
#endif
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