ref: bafc196c4b07261923d4f197659a26d0919cdeae
dir: /sys/src/ape/lib/bsd/getpeername.c/
/* posix */ #include <sys/types.h> #include <unistd.h> #include <stdlib.h> #include <stdio.h> #include <fcntl.h> #include <string.h> #include <errno.h> /* bsd extensions */ #include <sys/uio.h> #include <sys/socket.h> #include <netinet/in.h> #include <sys/un.h> #include "priv.h" int getpeername(int fd, struct sockaddr *addr, int *alen) { Rock *r; int olen, len; struct sockaddr_un *runix; r = _sock_findrock(fd, 0); if(r == 0){ errno = ENOTSOCK; return -1; } switch(r->domain){ case PF_INET: len = sizeof(struct sockaddr_in); break; case PF_INET6: len = sizeof(struct sockaddr_in6); break; case PF_UNIX: runix = (struct sockaddr_un*)&r->raddr; len = &runix->sun_path[strlen(runix->sun_path)] - (char*)runix; break; default: errno = EAFNOSUPPORT; return -1; } if(alen != 0){ olen = *alen; *alen = len; if(olen < len) len = olen; } if(addr != 0 && len > 0) memmove(addr, &r->raddr, len); return 0; }