// vim: noet sw=4 ts=4: /* ================================================================================== Copyright (c) 2020 Nokia Copyright (c) 2020 AT&T Intellectual Property. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. ================================================================================== */ /* ************************************************************************** * * Mnemonic: SIaddress * Abstract: This routine will convert a sockaddr_in structure to a * dotted decimal address, or visa versa. * If type == AC_TOADDR the src string may be: * xxx.xxx.xxx.xxx.portnumber or host-name.portnumber * xxx.xxx.xxx.xxx.service[.protocol] or hostname;service[;protocol] * if protocol is not supplied then tcp is assumed. * hostname may be something like godzilla.moviemania.com * Parms: src - Pointer to source buffer * dest- Pointer to dest buffer pointer * type- Type of conversion AC_TODOT converts sockaddr to human readable. AC_TOADDR * converts character buffer to sockaddr. * Returns: Nothing. * Date: 19 January 1995 * Author: E. Scott Daniels * * Modified: 22 Mar 1995 - To add support for ipx addresses. * 18 Oct 2020 - drop old port separator (;) * * CAUTION: The netdb.h header file is a bit off when it sets up the * hostent structure. It claims that h_addr_list is a pointer * to character pointers, but it is really a pointer to a list * of pointers to integers!!! * *************************************************************************** */ #include "sisetup.h" // get necessary defs and other stuff #include #include #include /* target: buffer with address e.g. 192.168.0.1:4444 :4444 (listen) [::1]4444 family: PF_INET[6] (let it be 0 to select based on addr in buffer proto: IPPROTO_TCP IPPROTO_UDP type: SOCK_STREAM SOCK_DGRAM returns length of struct pointed to by rap (return addr blockpointer) */ extern int SIgenaddr( char *target, int proto, int family, int socktype, struct sockaddr **rap ) { struct addrinfo hint; // hints to give getaddrinfo struct addrinfo *list = NULL; // list of what comes back int ga_flags = 0; // flags to pass to getaddrinfo in hints int error = 0; int rlen = 0; // length of the addr that rap points to on return char *pstr; // port string char *dstr; // a copy of the users target that we can destroy char* fptr; // ptr we allocated and need to free (we may adjust dstr) fptr = dstr = strdup( (char *) target ); // copy so we can destroy it with strtok *rap = NULL; // ensure null incase something breaks while( isspace( *dstr ) ) { dstr++; } if( *dstr == ':' ) { // user passed in :port -- so we assume this is for bind pstr = dstr; *(pstr++) = 0; ga_flags = AI_PASSIVE; } else { if( *dstr == '[' ) { // strip [ and ] from v6 and point pstring if port there dstr++; pstr = strchr( dstr, ']' ); if( !pstr || *pstr != ']' ) { free( fptr ); return -1; } *(pstr++) = 0; if( *pstr == ':' ) { *(pstr++) = 0; } else { pstr = NULL; } } else { // assume name or v4; point at port if there pstr = strchr( dstr, ':' ); if( pstr != NULL ) { *(pstr++) = 0; } } ga_flags = AI_ADDRCONFIG; // don't return IPVx addresses unless one such address is configured } memset( &hint, 0, sizeof( hint ) ); hint.ai_family = family; // AF_INET AF_INET6... let this be 0 to select best based on addr hint.ai_socktype = socktype; // SOCK_DGRAM SOCK_STREAM hint.ai_protocol = proto; // IPPROTO_TCP IPPROTO_UDP hint.ai_flags = ga_flags; if( DEBUG ) rmr_vlog( RMR_VL_DEBUG, "siaddress: calling getaddrinfo flags=%x sockty=%d proto=%d family=%d target=%s host=%s port=%s\n", ga_flags, socktype, proto, family, target, dstr, pstr ); if( (error = getaddrinfo( dstr, pstr, &hint, &list )) ) { fprintf( stderr, "sigenaddr: error from getaddrinfo: target=%s host=%s port=%s(port): error=(%d) %s\n", target, dstr, pstr, error, gai_strerror( error ) ); } else { *rap = (struct sockaddr *) malloc( list->ai_addrlen ); // alloc a buffer and give address to caller memcpy( *rap, list->ai_addr, list->ai_addrlen ); rlen = list->ai_addrlen; freeaddrinfo( list ); // ditch system allocated memory } free( fptr ); return rlen; } /* Given a source address convert from one form to another based on type constant. Type const == AC_TODOT Convert source address structure to human readable string. Type const == AC_TOADDR6 Convert source string (host:port or ipv6 address [n:n...:n]:port) to an address struct Type const == AC_TOADDR Convert source string (host:port or ipv4 dotted decimal address) to an address struct */ extern int SIaddress( void *src, void **dest, int type ) { struct sockaddr_in *addr; // pointer to the address struct sockaddr_in6 *addr6; // ip6 has a different layout unsigned char *num; // pointer at the address number uint8_t* byte; // pointer at the ipv6 address byte values char wbuf[256]; // work buffer int i; int rlen = 0; // return len - len of address struct or string if( src == NULL || dest == NULL ) { return rlen; } switch( type ) { case AC_TODOT: // convert from a struct to human readable "dotted decimal" addr = (struct sockaddr_in *) src; if( addr->sin_family == AF_INET6 ) { addr6 = (struct sockaddr_in6 *) src; // really an ip6 struct byte = (uint8_t *) &addr6->sin6_addr; snprintf( wbuf, sizeof( wbuf ), "[%u:%u:%u:%u:%u:%u]:%d", *(byte+0), *(byte+1), *(byte+2), *(byte+3), *(byte+4), *(byte+5) , (int) ntohs( addr6->sin6_port ) ); } else { num = (char *) &addr->sin_addr.s_addr; // point at the long snprintf( wbuf, sizeof( wbuf ), "%u.%u.%u.%u:%d", *(num+0), *(num+1), *(num+2), *(num+3), (int) ntohs(addr->sin_port) ); } *dest = (void *) strdup( wbuf ); rlen = strlen( *dest ); break; case AC_TOADDR6: // from hostname:port string to address for send etc return SIgenaddr( src, IPPROTO_TCP, AF_INET6, SOCK_STREAM, (struct sockaddr **) dest ); case AC_TOADDR: // from dotted decimal to address struct ip4 return SIgenaddr( src, IPPROTO_TCP, AF_INET, SOCK_STREAM, (struct sockaddr **) dest ); } return rlen; }