/* $Id: sock_linux_kernel.c 3553 2011-05-05 06:14:19Z nanang $ */ /* * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com) * Copyright (C) 2003-2008 Benny Prijono * * This program 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. * * This program 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 */ #include #include #include /* pj_memcpy() */ #include /* PJ_CHECK_STACK() */ #include /* pj_gethostbyname() */ #include #include #include #include /* Linux kernel specific. */ #include #include //#include #include #include /* sys_xxx() */ #include /* FIONBIO */ #include /* for pj_gethostname() */ /* * Address families conversion. * The values here are indexed based on pj_addr_family-0xFF00. */ const pj_uint16_t PJ_AF_UNIX = AF_UNIX; const pj_uint16_t PJ_AF_INET = AF_INET; const pj_uint16_t PJ_AF_INET6 = AF_INET6; #ifdef AF_PACKET const pj_uint16_t PJ_AF_PACKET = AF_PACKET; #else # error "AF_PACKET undeclared!" #endif #ifdef AF_IRDA const pj_uint16_t PJ_AF_IRDA = AF_IRDA; #else # error "AF_IRDA undeclared!" #endif /* * Socket types conversion. * The values here are indexed based on pj_sock_type-0xFF00 */ const pj_uint16_t PJ_SOCK_STREAM= SOCK_STREAM; const pj_uint16_t PJ_SOCK_DGRAM = SOCK_DGRAM; const pj_uint16_t PJ_SOCK_RAW = SOCK_RAW; const pj_uint16_t PJ_SOCK_RDM = SOCK_RDM; /* * Socket level values. */ const pj_uint16_t PJ_SOL_SOCKET = SOL_SOCKET; #ifdef SOL_IP const pj_uint16_t PJ_SOL_IP = SOL_IP; #else # error "SOL_IP undeclared!" #endif /* SOL_IP */ #if defined(SOL_TCP) const pj_uint16_t PJ_SOL_TCP = SOL_TCP; #else # error "SOL_TCP undeclared!" #endif /* SOL_TCP */ #ifdef SOL_UDP const pj_uint16_t PJ_SOL_UDP = SOL_UDP; #else # error "SOL_UDP undeclared!" #endif #ifdef SOL_IPV6 const pj_uint16_t PJ_SOL_IPV6 = SOL_IPV6; #else # error "SOL_IPV6 undeclared!" #endif /* optname values. */ const pj_uint16_t PJ_SO_TYPE = SO_TYPE; const pj_uint16_t PJ_SO_RCVBUF = SO_RCVBUF; const pj_uint16_t PJ_SO_SNDBUF = SO_SNDBUF; /* * Convert 16-bit value from network byte order to host byte order. */ PJ_DEF(pj_uint16_t) pj_ntohs(pj_uint16_t netshort) { return ntohs(netshort); } /* * Convert 16-bit value from host byte order to network byte order. */ PJ_DEF(pj_uint16_t) pj_htons(pj_uint16_t hostshort) { return htons(hostshort); } /* * Convert 32-bit value from network byte order to host byte order. */ PJ_DEF(pj_uint32_t) pj_ntohl(pj_uint32_t netlong) { return ntohl(netlong); } /* * Convert 32-bit value from host byte order to network byte order. */ PJ_DEF(pj_uint32_t) pj_htonl(pj_uint32_t hostlong) { return htonl(hostlong); } /* * Convert an Internet host address given in network byte order * to string in standard numbers and dots notation. */ PJ_DEF(char*) pj_inet_ntoa(pj_in_addr in) { #define UC(b) (((int)b)&0xff) static char b[18]; char *p; p = (char *)∈ pj_snprintf(b, sizeof(b), "%d.%d.%d.%d", UC(p[0]), UC(p[1]), UC(p[2]), UC(p[3])); return b; } /* * This function converts the Internet host address ccp from the standard * numbers-and-dots notation into binary data and stores it in the structure * that inp points to. */ PJ_DEF(int) pj_inet_aton(const pj_str_t *ccp, struct pj_in_addr *addr) { pj_uint32_t val; int base, n; char c; unsigned parts[4]; unsigned *pp = parts; char cp_copy[18]; char *cp = cp_copy; addr->s_addr = PJ_INADDR_NONE; if (ccp->slen > 15) return 0; pj_memcpy(cp, ccp->ptr, ccp->slen); cp[ccp->slen] = '\0'; c = *cp; for (;;) { /* * Collect number up to ``.''. * Values are specified as for C: * 0x=hex, 0=octal, isdigit=decimal. */ if (!pj_isdigit((int)c)) return (0); val = 0; base = 10; if (c == '0') { c = *++cp; if (c == 'x' || c == 'X') base = 16, c = *++cp; else base = 8; } for (;;) { if (pj_isascii((int)c) && pj_isdigit((int)c)) { val = (val * base) + (c - '0'); c = *++cp; } else if (base==16 && pj_isascii((int)c) && pj_isxdigit((int)c)) { val = (val << 4) | (c + 10 - (pj_islower((int)c) ? 'a' : 'A')); c = *++cp; } else break; } if (c == '.') { /* * Internet format: * a.b.c.d * a.b.c (with c treated as 16 bits) * a.b (with b treated as 24 bits) */ if (pp >= parts + 3) return (0); *pp++ = val; c = *++cp; } else break; } /* * Check for trailing characters. */ if (c != '\0' && (!pj_isascii((int)c) || !pj_isspace((int)c))) return (0); /* * Concoct the address according to * the number of parts specified. */ n = pp - parts + 1; switch (n) { case 0: return (0); /* initial nondigit */ case 1: /* a -- 32 bits */ break; case 2: /* a.b -- 8.24 bits */ if (val > 0xffffff) return (0); val |= parts[0] << 24; break; case 3: /* a.b.c -- 8.8.16 bits */ if (val > 0xffff) return (0); val |= (parts[0] << 24) | (parts[1] << 16); break; case 4: /* a.b.c.d -- 8.8.8.8 bits */ if (val > 0xff) return (0); val |= (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8); break; } if (addr) addr->s_addr = pj_htonl(val); return (1); } /* * Convert address string with numbers and dots to binary IP address. */ PJ_DEF(pj_in_addr) pj_inet_addr(const pj_str_t *cp) { pj_in_addr addr; pj_inet_aton(cp, &addr); return addr; } /* * Set the IP address of an IP socket address from string address, * with resolving the host if necessary. The string address may be in a * standard numbers and dots notation or may be a hostname. If hostname * is specified, then the function will resolve the host into the IP * address. */ PJ_DEF(pj_status_t) pj_sockaddr_in_set_str_addr( pj_sockaddr_in *addr, const pj_str_t *str_addr) { PJ_CHECK_STACK(); pj_assert(str_addr && str_addr->slen < PJ_MAX_HOSTNAME); addr->sin_family = AF_INET; if (str_addr && str_addr->slen) { addr->sin_addr = pj_inet_addr(str_addr); if (addr->sin_addr.s_addr == PJ_INADDR_NONE) { pj_hostent he; if (pj_gethostbyname(str_addr, &he) == 0) { addr->sin_addr.s_addr = *(pj_uint32_t*)he.h_addr; } else { addr->sin_addr.s_addr = PJ_INADDR_NONE; return -1; } } } else { addr->sin_addr.s_addr = 0; } return PJ_SUCCESS; } /* * Set the IP address and port of an IP socket address. * The string address may be in a standard numbers and dots notation or * may be a hostname. If hostname is specified, then the function will * resolve the host into the IP address. */ PJ_DEF(pj_status_t) pj_sockaddr_in_init( pj_sockaddr_in *addr, const pj_str_t *str_addr, pj_uint16_t port) { pj_assert(addr && str_addr); addr->sin_family = PJ_AF_INET; pj_sockaddr_in_set_port(addr, port); return pj_sockaddr_in_set_str_addr(addr, str_addr); } /* * Get hostname. */ PJ_DEF(const pj_str_t*) pj_gethostname(void) { static char buf[PJ_MAX_HOSTNAME]; static pj_str_t hostname; PJ_CHECK_STACK(); if (hostname.ptr == NULL) { hostname.ptr = buf; down_read(&uts_sem); hostname.slen = strlen(system_utsname.nodename); if (hostname.slen > PJ_MAX_HOSTNAME) { hostname.ptr[0] = '\0'; hostname.slen = 0; } else { pj_memcpy(hostname.ptr, system_utsname.nodename, hostname.slen); } up_read(&uts_sem); } return &hostname; } /* * Get first IP address associated with the hostname. */ PJ_DEF(pj_in_addr) pj_gethostaddr(void) { pj_sockaddr_in addr; const pj_str_t *hostname = pj_gethostname(); pj_sockaddr_in_set_str_addr(&addr, hostname); return addr.sin_addr; } /* * Create new socket/endpoint for communication and returns a descriptor. */ PJ_DEF(pj_status_t) pj_sock_socket(int af, int type, int proto, pj_sock_t *sock_fd) { long result; PJ_CHECK_STACK(); /* Sanity checks. */ PJ_ASSERT_RETURN(PJ_INVALID_SOCKET == -1 && sock_fd != NULL, PJ_EINVAL); /* Initialize returned socket */ *sock_fd = PJ_INVALID_SOCKET; /* Create socket. */ result = sys_socket(af, type, proto); if (result < 0) { return PJ_RETURN_OS_ERROR((-result)); } *sock_fd = result; return PJ_SUCCESS; } /* * Bind socket. */ PJ_DEF(pj_status_t) pj_sock_bind( pj_sock_t sockfd, const pj_sockaddr_t *addr, int len) { long err; mm_segment_t oldfs; PJ_CHECK_STACK(); PJ_ASSERT_RETURN(addr!=NULL && len >= sizeof(struct pj_sockaddr), PJ_EINVAL); oldfs = get_fs(); set_fs(KERNEL_DS); err = sys_bind(sockfd, (struct sockaddr*)addr, len); set_fs(oldfs); if (err) return PJ_RETURN_OS_ERROR(-err); else return PJ_SUCCESS; } /* * Bind socket. */ PJ_DEF(pj_status_t) pj_sock_bind_in( pj_sock_t sockfd, pj_uint32_t addr32, pj_uint16_t port) { pj_sockaddr_in addr; PJ_CHECK_STACK(); addr.sin_family = PJ_AF_INET; addr.sin_addr.s_addr = pj_htonl(addr32); addr.sin_port = pj_htons(port); return pj_sock_bind(sockfd, &addr, sizeof(pj_sockaddr_in)); } /* * Close socket. */ PJ_DEF(pj_status_t) pj_sock_close(pj_sock_t sockfd) { long err; err = sys_close(sockfd); if (err != 0) return PJ_RETURN_OS_ERROR(-err); else return PJ_SUCCESS; } /* * Get remote's name. */ PJ_DEF(pj_status_t) pj_sock_getpeername( pj_sock_t sockfd, pj_sockaddr_t *addr, int *namelen) { mm_segment_t oldfs; long err; PJ_CHECK_STACK(); oldfs = get_fs(); set_fs(KERNEL_DS); err = sys_getpeername( sockfd, addr, namelen); set_fs(oldfs); if (err) return PJ_RETURN_OS_ERROR(-err); else return PJ_SUCCESS; } /* * Get socket name. */ PJ_DEF(pj_status_t) pj_sock_getsockname( pj_sock_t sockfd, pj_sockaddr_t *addr, int *namelen) { mm_segment_t oldfs; int err; PJ_CHECK_STACK(); oldfs = get_fs(); set_fs(KERNEL_DS); err = sys_getsockname( sockfd, addr, namelen ); set_fs(oldfs); if (err) return PJ_RETURN_OS_ERROR(-err); else return PJ_SUCCESS; } /* * Send data */ PJ_DEF(pj_status_t) pj_sock_send( pj_sock_t sockfd, const void *buf, pj_ssize_t *len, unsigned flags) { return pj_sock_sendto(sockfd, buf, len, flags, NULL, 0); } /* * Send data. */ PJ_DEF(pj_status_t) pj_sock_sendto( pj_sock_t sockfd, const void *buff, pj_ssize_t *len, unsigned flags, const pj_sockaddr_t *addr, int addr_len) { long err; mm_segment_t oldfs; PJ_CHECK_STACK(); oldfs = get_fs(); set_fs(KERNEL_DS); err = *len = sys_sendto( sockfd, (void*)buff, *len, flags, (void*)addr, addr_len ); set_fs(oldfs); if (err >= 0) { return PJ_SUCCESS; } else { return PJ_RETURN_OS_ERROR(-err); } } /* * Receive data. */ PJ_DEF(pj_status_t) pj_sock_recv( pj_sock_t sockfd, void *buf, pj_ssize_t *len, unsigned flags) { return pj_sock_recvfrom(sockfd, buf, len, flags, NULL, NULL); } /* * Receive data. */ PJ_DEF(pj_status_t) pj_sock_recvfrom( pj_sock_t sockfd, void *buff, pj_ssize_t *size, unsigned flags, pj_sockaddr_t *from, int *fromlen) { mm_segment_t oldfs; long err; PJ_CHECK_STACK(); oldfs = get_fs(); set_fs(KERNEL_DS); err = *size = sys_recvfrom( sockfd, buff, *size, flags, from, fromlen); set_fs(oldfs); if (err >= 0) { return PJ_SUCCESS; } else { return PJ_RETURN_OS_ERROR(-err); } } /* * Get socket option. */ PJ_DEF(pj_status_t) pj_sock_getsockopt( pj_sock_t sockfd, pj_uint16_t level, pj_uint16_t optname, void *optval, int *optlen) { mm_segment_t oldfs; long err; PJ_CHECK_STACK(); oldfs = get_fs(); set_fs(KERNEL_DS); err = sys_getsockopt( sockfd, level, optname, optval, optlen); set_fs(oldfs); if (err) return PJ_RETURN_OS_ERROR(-err); else return PJ_SUCCESS; } /* * Set socket option. */ PJ_DEF(pj_status_t) pj_sock_setsockopt( pj_sock_t sockfd, pj_uint16_t level, pj_uint16_t optname, const void *optval, int optlen) { long err; mm_segment_t oldfs; PJ_CHECK_STACK(); oldfs = get_fs(); set_fs(KERNEL_DS); err = sys_setsockopt( sockfd, level, optname, (void*)optval, optlen); set_fs(oldfs); if (err) return PJ_RETURN_OS_ERROR(-err); else return PJ_SUCCESS; } /* * Shutdown socket. */ #if PJ_HAS_TCP PJ_DEF(pj_status_t) pj_sock_shutdown( pj_sock_t sockfd, int how) { long err; PJ_CHECK_STACK(); err = sys_shutdown(sockfd, how); if (err) return PJ_RETURN_OS_ERROR(-err); else return PJ_SUCCESS; } /* * Start listening to incoming connections. */ PJ_DEF(pj_status_t) pj_sock_listen( pj_sock_t sockfd, int backlog) { long err; PJ_CHECK_STACK(); err = sys_listen( sockfd, backlog ); if (err) return PJ_RETURN_OS_ERROR(-err); else return PJ_SUCCESS; } /* * Connect socket. */ PJ_DEF(pj_status_t) pj_sock_connect( pj_sock_t sockfd, const pj_sockaddr_t *addr, int namelen) { long err; mm_segment_t oldfs; PJ_CHECK_STACK(); oldfs = get_fs(); set_fs(KERNEL_DS); err = sys_connect( sockfd, (void*)addr, namelen ); set_fs(oldfs); if (err) return PJ_RETURN_OS_ERROR(-err); else return PJ_SUCCESS; } /* * Accept incoming connections */ PJ_DEF(pj_status_t) pj_sock_accept( pj_sock_t sockfd, pj_sock_t *newsockfd, pj_sockaddr_t *addr, int *addrlen) { long err; PJ_CHECK_STACK(); PJ_ASSERT_RETURN(newsockfd != NULL, PJ_EINVAL); err = sys_accept( sockfd, addr, addrlen); if (err < 0) { *newsockfd = PJ_INVALID_SOCKET; return PJ_RETURN_OS_ERROR(-err); } else { *newsockfd = err; return PJ_SUCCESS; } } #endif /* PJ_HAS_TCP */ /* * Permission to steal inet_ntoa() and inet_aton() as long as this notice below * is included: */ /* * 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. 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 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. */