[sr-dev] git:3.1: modules_k/nathelper: add_contact_alias adds <>s around contact URI

Module: sip-router Branch: 3.1 Commit: f5ef15fee0c3bf09adf2506effa0895f72af9034 URL: http://git.sip-router.org/cgi-bin/gitweb.cgi/sip-router/?a=commit;h=f5ef15f… Author: Juha Heinanen &lt;jh(a)tutpro.com&gt; Committer: Juha Heinanen &lt;jh(a)tutpro.com&gt; Date: Fri Nov 26 10:37:30 2010 +0200 modules_k/nathelper: add_contact_alias adds <>s around contact URI Make sure that Contact URI is surrounded by <> when adding ;alias parameter. Otherwise, ;alias parameter may be interpreted as header parameter, because the syntax seems to be ambiguous. --- modules_k/nathelper/nathelper.c | 69 +++++++++++++++++++++++++++++++------- 1 files changed, 56 insertions(+), 13 deletions(-) diff --git a/modules_k/nathelper/nathelper.c b/modules_k/nathelper/nathelper.c index 82c6528..dd737a3 100644 --- a/modules_k/nathelper/nathelper.c +++ b/modules_k/nathelper/nathelper.c @@ -786,7 +786,7 @@ add_contact_alias_f(struct sip_msg* msg, char* str1, char* str2) struct lump *anchor; struct sip_uri uri; struct ip_addr *ip; - char *param, *at, *port, *start; + char *lt, *gt, *param, *at, *port, *start; /* Do nothing if Contact header does not exist */ if (!msg->contact) { @@ -816,25 +816,63 @@ add_contact_alias_f(struct sip_msg* msg, char* str1, char* str2) return 2; } - /* Add alias param */ + /* Check if function has been called already */ if ((c->uri.s < msg->buf) || (c->uri.s > (msg->buf + msg->len))) { LM_ERR("you can't call alias_contact twice, check your config!\n"); return -1; } + + /* Check if Contact URI needs to be enclosed in <>s */ + lt = gt = param = NULL; + at = memchr(msg->contact->body.s, '<', msg->contact->body.len); + if (at == NULL) { + lt = (char*)pkg_malloc(1); + if (!lt) { + LM_ERR("no pkg memory left for lt sign\n"); + goto err; + } + *lt = '<'; + anchor = anchor_lump(msg, msg->contact->body.s - msg->buf, 0, 0); + if (anchor == NULL) { + LM_ERR("anchor_lump for beginning of contact body failed\n"); + goto err; + } + if (insert_new_lump_before(anchor, lt, 1, 0) == 0) { + LM_ERR("insert_new_lump_before for \"<\" failed\n"); + goto err; + } + gt = (char*)pkg_malloc(1); + if (!gt) { + LM_ERR("no pkg memory left for gt sign\n"); + goto err; + } + *gt = '>'; + anchor = anchor_lump(msg, msg->contact->body.s + + msg->contact->body.len - msg->buf, 0, 0); + if (anchor == NULL) { + LM_ERR("anchor_lump for end of contact body failed\n"); + goto err; + } + if (insert_new_lump_before(anchor, gt, 1, 0) == 0) { + LM_ERR("insert_new_lump_before for \">\" failed\n"); + goto err; + } + } + + /* Create ;alias param */ param_len = SALIAS_LEN + IP6_MAX_STR_SIZE + 1 /* ~ */ + 5 /* port */ + 1 /* ~ */ + 1 /* proto */; param = (char*)pkg_malloc(param_len); if (!param) { LM_ERR("no pkg memory left for alias param\n"); - return -1; + goto err; } at = param; append_str(at, SALIAS, SALIAS_LEN); ip_len = ip_addr2sbuf(&(msg->rcv.src_ip), at, param_len - SALIAS_LEN); if (ip_len <= 0) { - pkg_free(param); LM_ERR("failed to copy source ip\n"); - return -1; + goto err; } at = at + ip_len; append_chr(at, '~'); @@ -842,9 +880,8 @@ add_contact_alias_f(struct sip_msg* msg, char* str1, char* str2) append_str(at, port, len); append_chr(at, '~'); if ((msg->rcv.proto < PROTO_UDP) || (msg->rcv.proto > PROTO_SCTP)) { - pkg_free(param); LM_ERR("invalid transport protocol\n"); - return -1; + goto err; } append_chr(at, msg->rcv.proto + '0'); param_len = at - param; @@ -854,18 +891,24 @@ add_contact_alias_f(struct sip_msg* msg, char* str1, char* str2) } else { start = uri.host.s + uri.host.len; } + + /* Add ;alias param */ anchor = anchor_lump(msg, start - msg->buf, 0, 0); if (anchor == NULL) { - pkg_free(param); - LM_ERR("anchor_lump failed\n"); - return -1; + LM_ERR("anchor_lump for ;alias param failed\n"); + goto err; } if (insert_new_lump_after(anchor, param, param_len, 0) == 0) { - LM_ERR("insert_new_lump_after failed\n"); - pkg_free(param); - return -1; + LM_ERR("insert_new_lump_after for ;alias param failed\n"); + goto err; } return 1; + + err: + if (lt) pkg_free(lt); + if (gt) pkg_free(gt); + if (param) pkg_free(param); + return -1; }