/*- * Copyright (c) 1998 Dag-Erling Coïdan Smørgrav * 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 * in this position and unchanged. * 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. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. * * $FreeBSD: head/lib/libfetch/common.c 60924 2000-05-25 16:24:31Z des $ */ #include #include #include #include #include #include #include #include #include #include #include #include "fetch.h" #include "common.h" /*** Local data **************************************************************/ /* * Error messages for resolver errors */ static struct fetcherr _netdb_errlist[] = { { EAI_NODATA, FETCH_RESOLV, "Host not found" }, { EAI_AGAIN, FETCH_TEMP, "Transient resolver failure" }, { EAI_FAIL, FETCH_RESOLV, "Non-recoverable resolver failure" }, { EAI_NONAME, FETCH_RESOLV, "No address record" }, { -1, FETCH_UNKNOWN, "Unknown resolver error" } }; /*** Error-reporting functions ***********************************************/ /* * Map error code to string */ static struct fetcherr * _fetch_finderr(struct fetcherr *p, int e) { while (p->num != -1 && p->num != e) p++; return p; } /* * Set error code */ void _fetch_seterr(struct fetcherr *p, int e) { p = _fetch_finderr(p, e); fetchLastErrCode = p->cat; snprintf(fetchLastErrString, MAXERRSTRING, "%s", p->string); } /* * Set error code according to errno */ void _fetch_syserr(void) { int e; e = errno; switch (errno) { case 0: fetchLastErrCode = FETCH_OK; break; case EPERM: case EACCES: case EROFS: case EAUTH: case ENEEDAUTH: fetchLastErrCode = FETCH_AUTH; break; case ENOENT: case EISDIR: /* XXX */ fetchLastErrCode = FETCH_UNAVAIL; break; case ENOMEM: fetchLastErrCode = FETCH_MEMORY; break; case EBUSY: case EAGAIN: fetchLastErrCode = FETCH_TEMP; break; case EEXIST: fetchLastErrCode = FETCH_EXISTS; break; case ENOSPC: fetchLastErrCode = FETCH_FULL; break; case EADDRINUSE: case EADDRNOTAVAIL: case ENETDOWN: case ENETUNREACH: case ENETRESET: case EHOSTUNREACH: fetchLastErrCode = FETCH_NETWORK; break; case ECONNABORTED: case ECONNRESET: fetchLastErrCode = FETCH_ABORT; break; case ETIMEDOUT: fetchLastErrCode = FETCH_TIMEOUT; break; case ECONNREFUSED: case EHOSTDOWN: fetchLastErrCode = FETCH_DOWN; break; default: fetchLastErrCode = FETCH_UNKNOWN; } snprintf(fetchLastErrString, MAXERRSTRING, "%s", strerror(e)); } /* * Emit status message */ void _fetch_info(char *fmt, ...) { va_list ap; va_start(ap, fmt); vfprintf(stderr, fmt, ap); va_end(ap); } /*** Network-related utility functions ***************************************/ /* * Establish a TCP connection to the specified port on the specified host. */ int _fetch_connect(char *host, int port, int af, int verbose) { char pbuf[10]; struct addrinfo hints, *res, *res0; int sd, err; #ifndef NDEBUG fprintf(stderr, "\033[1m---> %s:%d\033[m\n", host, port); #endif if (verbose) _fetch_info("looking up %s", host); /* look up host name and set up socket address structure */ snprintf(pbuf, sizeof(pbuf), "%d", port); memset(&hints, 0, sizeof(hints)); hints.ai_family = af; hints.ai_socktype = SOCK_STREAM; hints.ai_protocol = 0; if ((err = getaddrinfo(host, pbuf, &hints, &res0)) != 0) { _netdb_seterr(err); return -1; } if (verbose) _fetch_info("connecting to %s:%d", host, port); /* try to connect */ sd = -1; for (res = res0; res; res = res->ai_next) { if ((sd = socket(res->ai_family, res->ai_socktype, res->ai_protocol)) < 0) continue; if (connect(sd, res->ai_addr, res->ai_addrlen) >= 0) break; close(sd); sd = -1; } if (sd < 0) { _fetch_syserr(); return -1; } return sd; } /* * Read a line of text from a socket w/ timeout */ #define MIN_BUF_SIZE 1024 int _fetch_getln(int fd, char **buf, size_t *size, size_t *len) { struct timeval now, timeout, wait; fd_set readfds; int r; char c; if (*buf == NULL) { if ((*buf = malloc(MIN_BUF_SIZE)) == NULL) { errno = ENOMEM; return -1; } *size = MIN_BUF_SIZE; } **buf = '\0'; *len = 0; if (fetchTimeout) { gettimeofday(&timeout, NULL); timeout.tv_sec += fetchTimeout; FD_ZERO(&readfds); } do { if (fetchTimeout) { FD_SET(fd, &readfds); gettimeofday(&now, NULL); wait.tv_sec = timeout.tv_sec - now.tv_sec; wait.tv_usec = timeout.tv_usec - now.tv_usec; if (wait.tv_usec < 0) { wait.tv_usec += 1000000; wait.tv_sec--; } if (wait.tv_sec < 0) { errno = ETIMEDOUT; return -1; } r = select(fd+1, &readfds, NULL, NULL, &wait); if (r == -1) { if (errno == EINTR) continue; /* EBADF or EINVAL: shouldn't happen */ return -1; } if (!FD_ISSET(fd, &readfds)) continue; } r = read(fd, &c, 1); if (r == 0) break; if (r == -1) { if (errno == EINTR) continue; /* any other error is bad news */ return -1; } (*buf)[*len] = c; *len += 1; if (*len == *size) { char *tmp; if ((tmp = realloc(*buf, *size * 2 + 1)) == NULL) { errno = ENOMEM; return -1; } *buf = tmp; *size = *size * 2 + 1; } } while (c != '\n'); return 0; } /*** Directory-related utility functions *************************************/ int _fetch_add_entry(struct url_ent **p, int *size, int *len, char *name, struct url_stat *stat) { struct url_ent *tmp; if (*p == NULL) { #define INITIAL_SIZE 8 if ((*p = malloc(INITIAL_SIZE * sizeof **p)) == NULL) { errno = ENOMEM; _fetch_syserr(); return -1; } *size = INITIAL_SIZE; *len = 0; #undef INITIAL_SIZE } if (*len >= *size - 1) { tmp = realloc(*p, *size * 2 * sizeof **p); if (tmp == NULL) { errno = ENOMEM; _fetch_syserr(); return -1; } *size *= 2; *p = tmp; } tmp = *p + *len; snprintf(tmp->name, MAXPATHLEN, "%s", name); bcopy(stat, &tmp->stat, sizeof *stat); (*len)++; (++tmp)->name[0] = 0; return 0; }