mirror of
https://github.com/matrix-construct/construct
synced 2024-08-31 05:45:16 +02:00
239 lines
5.2 KiB
C
239 lines
5.2 KiB
C
/*
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* charybdis - an advanced ircd.
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* Copyright (c) 2016 William Pitcock <nenolod@dereferenced.org>.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice is present in all copies.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "stdinc.h"
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#include "ircd_defs.h"
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#include "msgbuf.h"
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#include "client.h"
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#include "ircd.h"
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/*
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* parse a message into a MsgBuf.
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* returns 0 on success, 1 on error.
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*/
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int
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msgbuf_parse(struct MsgBuf *msgbuf, char *line)
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{
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char *ch;
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char *parv[MAXPARA];
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size_t n_para;
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/* skip any leading spaces */
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for (ch = line; *ch && *ch == ' '; ch++)
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;
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msgbuf_init(msgbuf);
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if (*ch == '@')
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{
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char *t = ch + 1;
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ch = strchr(ch, ' ');
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if (ch != NULL)
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{
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while (1)
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{
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char *next = strchr(t, ';');
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char *eq = strchr(t, '=');
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if (next != NULL)
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{
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*next = '\0';
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if (eq > next)
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eq = NULL;
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}
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if (eq != NULL)
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*eq++ = '\0';
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if (*t && *t != ' ')
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msgbuf_append_tag(msgbuf, t, eq, 0);
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else
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break;
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if (next != NULL)
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t = next + 1;
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else
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break;
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}
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*ch++ = '\0';
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}
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}
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/* skip any whitespace between tags and origin */
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for (; *ch && *ch == ' '; ch++)
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;
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if (*ch == ':')
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{
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ch++;
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msgbuf->origin = ch;
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char *end = strchr(ch, ' ');
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if (end == NULL)
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return 1;
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*end = '\0';
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for (ch = end + 1; *ch && *ch == ' '; ch++)
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;
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}
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if (*ch == '\0')
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return 1;
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n_para = rb_string_to_array(ch, parv, MAXPARA);
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if (n_para == 0)
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return 1;
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msgbuf->cmd = parv[0];
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for (size_t i = 0; i < n_para; i++)
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msgbuf_append_para(msgbuf, parv[i]);
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return 0;
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}
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static int
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msgbuf_has_matching_tags(struct MsgBuf *msgbuf, unsigned int capmask)
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{
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for (size_t i = 0; i < msgbuf->n_tags; i++)
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{
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if ((msgbuf->tags[i].capmask & capmask) != 0)
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return 1;
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}
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return 0;
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}
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static void
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msgbuf_unparse_tags(char *buf, size_t buflen, struct MsgBuf *msgbuf, unsigned int capmask)
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{
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if (!msgbuf_has_matching_tags(msgbuf, capmask))
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return;
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*buf = '@';
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for (size_t i = 0; i < msgbuf->n_tags; i++)
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{
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if ((msgbuf->tags[i].capmask & capmask) == 0)
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continue;
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if (i != 0)
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rb_strlcat(buf, ";", buflen);
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rb_strlcat(buf, msgbuf->tags[i].key, buflen);
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/* XXX properly handle escaping */
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if (msgbuf->tags[i].value)
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{
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rb_strlcat(buf, "=", buflen);
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rb_strlcat(buf, msgbuf->tags[i].value, buflen);
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}
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}
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rb_strlcat(buf, " ", buflen);
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}
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void
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msgbuf_unparse_prefix(char *buf, size_t buflen, struct MsgBuf *msgbuf, unsigned int capmask)
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{
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memset(buf, 0, buflen);
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if (msgbuf->n_tags > 0)
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msgbuf_unparse_tags(buf, buflen, msgbuf, capmask);
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rb_snprintf_append(buf, buflen, ":%s ", msgbuf->origin != NULL ? msgbuf->origin : me.name);
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if (msgbuf->cmd != NULL)
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rb_snprintf_append(buf, buflen, "%s ", msgbuf->cmd);
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if (msgbuf->target != NULL)
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rb_snprintf_append(buf, buflen, "%s ", msgbuf->target);
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}
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/*
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* unparse a pure MsgBuf into a buffer.
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* if origin is NULL, me.name will be used.
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* cmd may not be NULL.
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* returns 0 on success, 1 on error.
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*/
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int
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msgbuf_unparse(char *buf, size_t buflen, struct MsgBuf *msgbuf, unsigned int capmask)
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{
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msgbuf_unparse_prefix(buf, buflen, msgbuf, capmask);
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for (size_t i = msgbuf->cmd != NULL ? 0 : 1; i < msgbuf->n_para; i++)
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{
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if (i == (msgbuf->n_para - 1))
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{
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if (strchr(msgbuf->para[i], ' ') != NULL)
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rb_snprintf_append(buf, buflen, ":%s", msgbuf->para[i]);
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else
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rb_strlcat(buf, msgbuf->para[i], buflen);
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}
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else
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rb_strlcat(buf, msgbuf->para[i], buflen);
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}
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return 0;
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}
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/*
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* unparse a MsgBuf stem + format string into a buffer
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* if origin is NULL, me.name will be used.
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* cmd may not be NULL.
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* returns 0 on success, 1 on error.
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*/
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int
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msgbuf_vunparse_fmt(char *buf, size_t buflen, struct MsgBuf *head, unsigned int capmask, const char *fmt, va_list va)
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{
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char *ws;
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size_t prefixlen;
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msgbuf_unparse_prefix(buf, buflen, head, capmask);
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prefixlen = strlen(buf);
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ws = buf + prefixlen;
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vsnprintf(ws, buflen - prefixlen, fmt, va);
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return 0;
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}
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/*
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* unparse a MsgBuf stem + format string into a buffer (with va_list handling)
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* if origin is NULL, me.name will be used.
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* cmd may not be NULL.
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* returns 0 on success, 1 on error.
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*/
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int
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msgbuf_unparse_fmt(char *buf, size_t buflen, struct MsgBuf *head, unsigned int capmask, const char *fmt, ...)
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{
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va_list va;
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int res;
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va_start(va, fmt);
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res = msgbuf_vunparse_fmt(buf, buflen, head, capmask, fmt, va);
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va_end(va);
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return res;
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}
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