217 lines
4.7 KiB
C
217 lines
4.7 KiB
C
#include <sys/cdefs.h>
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#include "namespace.h"
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#ifdef __weak_alias
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__weak_alias(bind, _bind)
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#endif
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#include <unistd.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <limits.h>
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#include <errno.h>
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#include <stdio.h>
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#include <string.h>
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#include <sys/ioctl.h>
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#include <sys/socket.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <netinet/in.h>
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#include <net/gen/in.h>
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#include <net/gen/tcp.h>
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#include <net/gen/tcp_io.h>
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#include <net/gen/udp.h>
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#include <net/gen/udp_io.h>
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#include <sys/un.h>
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#include <minix/config.h>
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#include <minix/const.h>
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#define DEBUG 0
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static int _tcp_bind(int sock, const struct sockaddr *address,
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socklen_t address_len, nwio_tcpconf_t *tcpconfp);
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static int _udp_bind(int sock, const struct sockaddr *address,
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socklen_t address_len, nwio_udpopt_t *udpoptp);
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static int _uds_bind(int sock, const struct sockaddr *address,
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socklen_t address_len, struct sockaddr_un *uds_addr);
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int bind(int sock, const struct sockaddr *address, socklen_t address_len)
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{
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int r;
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nwio_tcpconf_t tcpconf;
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nwio_udpopt_t udpopt;
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struct sockaddr_un uds_addr;
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r= ioctl(sock, NWIOGTCPCONF, &tcpconf);
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if (r != -1 || errno != ENOTTY)
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{
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if (r == -1)
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return r;
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r= _tcp_bind(sock, address, address_len, &tcpconf);
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#if DEBUG
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if (r == -1)
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{
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int t_errno= errno;
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fprintf(stderr, "bind(tcp) failed: %s\n",
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strerror(errno));
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errno= t_errno;
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}
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#endif
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return r;
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}
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r= ioctl(sock, NWIOGUDPOPT, &udpopt);
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if (r != -1 || errno != ENOTTY)
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{
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if (r == -1)
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return r;
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return _udp_bind(sock, address, address_len, &udpopt);
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}
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r= ioctl(sock, NWIOGUDSADDR, &uds_addr);
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if (r != -1 || errno != ENOTTY)
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{
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if (r == -1)
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return r;
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return _uds_bind(sock, address, address_len, &uds_addr);
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}
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#if DEBUG
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fprintf(stderr, "bind: not implemented for fd %d\n", sock);
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#endif
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errno= ENOSYS;
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return -1;
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}
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static int _tcp_bind(int sock, const struct sockaddr *address,
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socklen_t address_len, nwio_tcpconf_t *tcpconfp)
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{
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int r;
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nwio_tcpconf_t tcpconf;
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struct sockaddr_in *sinp;
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sinp= (struct sockaddr_in *) __UNCONST(address);
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if (sinp->sin_family != AF_INET || address_len < sizeof(*sinp))
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{
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#if DEBUG
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fprintf(stderr, "bind(tcp): sin_family = %d, len = %d\n",
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sinp->sin_family, address_len);
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#endif
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errno= EAFNOSUPPORT;
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return -1;
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}
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if (sinp->sin_addr.s_addr != INADDR_ANY &&
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sinp->sin_addr.s_addr != tcpconfp->nwtc_locaddr)
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{
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errno= EADDRNOTAVAIL;
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return -1;
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}
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tcpconf.nwtc_flags= 0;
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if (sinp->sin_port == 0)
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tcpconf.nwtc_flags |= NWTC_LP_SEL;
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else
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{
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tcpconf.nwtc_flags |= NWTC_LP_SET;
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tcpconf.nwtc_locport= sinp->sin_port;
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}
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r= ioctl(sock, NWIOSTCPCONF, &tcpconf);
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return r;
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}
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static int _udp_bind(int sock, const struct sockaddr *address,
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socklen_t address_len, nwio_udpopt_t *udpoptp)
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{
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int r;
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unsigned long curr_flags;
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nwio_udpopt_t udpopt;
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struct sockaddr_in *sinp;
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sinp= (struct sockaddr_in *) __UNCONST(address);
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if (sinp->sin_family != AF_INET || address_len < sizeof(*sinp))
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{
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#if DEBUG
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fprintf(stderr, "bind(udp): sin_family = %d, len = %d\n",
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sinp->sin_family, address_len);
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#endif
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errno= EAFNOSUPPORT;
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return -1;
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}
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if (sinp->sin_addr.s_addr != INADDR_ANY &&
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sinp->sin_addr.s_addr != udpoptp->nwuo_locaddr)
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{
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errno= EADDRNOTAVAIL;
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return -1;
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}
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udpopt.nwuo_flags= 0;
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if (sinp->sin_port == 0)
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udpopt.nwuo_flags |= NWUO_LP_SEL;
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else
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{
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udpopt.nwuo_flags |= NWUO_LP_SET;
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udpopt.nwuo_locport= sinp->sin_port;
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}
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curr_flags= udpoptp->nwuo_flags;
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if (!(curr_flags & NWUO_ACC_MASK))
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udpopt.nwuo_flags |= NWUO_EXCL;
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if (!(curr_flags & (NWUO_EN_LOC|NWUO_DI_LOC)))
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udpopt.nwuo_flags |= NWUO_EN_LOC;
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if (!(curr_flags & (NWUO_EN_BROAD|NWUO_DI_BROAD)))
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udpopt.nwuo_flags |= NWUO_EN_BROAD;
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if (!(curr_flags & (NWUO_RP_SET|NWUO_RP_ANY)))
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udpopt.nwuo_flags |= NWUO_RP_ANY;
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if (!(curr_flags & (NWUO_RA_SET|NWUO_RA_ANY)))
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udpopt.nwuo_flags |= NWUO_RA_ANY;
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if (!(curr_flags & (NWUO_RWDATONLY|NWUO_RWDATALL)))
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udpopt.nwuo_flags |= NWUO_RWDATALL;
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if (!(curr_flags & (NWUO_EN_IPOPT|NWUO_DI_IPOPT)))
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udpopt.nwuo_flags |= NWUO_DI_IPOPT;
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r= ioctl(sock, NWIOSUDPOPT, &udpopt);
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return r;
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}
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static int _uds_bind(int sock, const struct sockaddr *address,
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socklen_t address_len, struct sockaddr_un *uds_addr)
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{
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int r;
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int did_mknod;
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if (address == NULL) {
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errno = EFAULT;
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return -1;
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}
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did_mknod = 0;
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r = mknod(((struct sockaddr_un *) __UNCONST(address))->sun_path,
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S_IFSOCK|S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH, 0);
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if (r == -1 && errno != EEXIST) {
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return -1;
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} else if (r == 0) {
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did_mknod = 1;
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}
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/* perform the bind */
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r= ioctl(sock, NWIOSUDSADDR, (void *) __UNCONST(address));
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if (r == -1 && did_mknod) {
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/* bind() failed in pfs, so we roll back the
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* file system change
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*/
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unlink(((struct sockaddr_un *) __UNCONST(address))->sun_path);
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}
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return r;
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}
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