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/** \file servport.c Resolve service name to port number. |
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* \author Matthias Andree |
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* \date 2005 - 2006 |
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* |
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* Copyright (C) 2005 by Matthias Andree |
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* For license terms, see the file COPYING in this directory. |
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*/ |
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#include "fetchmail.h" |
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#include "getaddrinfo.h" |
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#include "i18n.h" |
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|
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#include <errno.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <sys/types.h> |
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#include <netdb.h> |
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#if defined(HAVE_NETINET_IN_H) |
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#include <netinet/in.h> |
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#endif |
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#ifdef HAVE_ARPA_INET_H |
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#include <arpa/inet.h> |
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#endif |
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#include <sys/socket.h> |
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|
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int servport(const char *service) { |
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int port, e; |
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unsigned long u; |
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char *end; |
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|
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if (service == 0) |
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return -1; |
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|
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/* |
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* Check if the service is a number. If so, convert it. |
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* If it isn't a number, call getservbyname to resolve it. |
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*/ |
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errno = 0; |
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u = strtoul(service, &end, 10); |
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if (errno || end[strspn(end, POSIX_space)] != '\0') { |
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struct addrinfo hints, *res; |
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|
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/* hardcode kpop to port 1109 as per fetchmail(1) |
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* manual page, it's not a IANA registered service */ |
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if (strcmp(service, "kpop") == 0) |
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return 1109; |
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|
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memset(&hints, 0, sizeof hints); |
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hints.ai_family = AF_UNSPEC; |
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hints.ai_socktype = SOCK_STREAM; |
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hints.ai_protocol = IPPROTO_TCP; |
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e = fm_getaddrinfo(NULL, service, &hints, &res); |
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if (e) { |
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report(stderr, GT_("getaddrinfo(NULL, \"%s\") error: %s\n"), |
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service, gai_strerror(e)); |
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goto err; |
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} else { |
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switch(res->ai_addr->sa_family) { |
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case AF_INET: |
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port = ntohs(((struct sockaddr_in *)res->ai_addr)->sin_port); |
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break; |
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#ifdef AF_INET6 |
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case AF_INET6: |
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port = ntohs(((struct sockaddr_in6 *)res->ai_addr)->sin6_port); |
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break; |
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#endif |
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default: |
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fm_freeaddrinfo(res); |
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goto err; |
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} |
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fm_freeaddrinfo(res); |
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} |
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} else { |
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if (u == 0 || u > 65535) |
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goto err; |
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port = u; |
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} |
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|
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return port; |
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err: |
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report(stderr, GT_("Cannot resolve service %s to port number.\n"), service); |
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report(stderr, GT_("Please specify the service as decimal port number.\n")); |
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return -1; |
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} |
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/* end of servport.c */ |
